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qt3/src/kernel/qimage.cpp

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/****************************************************************************
**
** Implementation of QImage and QImageIO classes
**
** Created : 950207
**
** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
**
** This file is part of the kernel module of the Qt GUI Toolkit.
**
** This file may be used under the terms of the GNU General
** Public License versions 2.0 or 3.0 as published by the Free
** Software Foundation and appearing in the files LICENSE.GPL2
** and LICENSE.GPL3 included in the packaging of this file.
** Alternatively you may (at your option) use any later version
** of the GNU General Public License if such license has been
** publicly approved by Trolltech ASA (or its successors, if any)
** and the KDE Free Qt Foundation.
**
** Please review the following information to ensure GNU General
** Public Licensing requirements will be met:
** http://trolltech.com/products/qt/licenses/licensing/opensource/.
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
** or contact the sales department at sales@trolltech.com.
**
** This file may be used under the terms of the Q Public License as
** defined by Trolltech ASA and appearing in the file LICENSE.QPL
** included in the packaging of this file. Licensees holding valid Qt
** Commercial licenses may use this file in accordance with the Qt
** Commercial License Agreement provided with the Software.
**
** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
** herein.
**
**********************************************************************/
#include "qimage.h"
#include "qregexp.h"
#include "qfile.h"
#include "qdatastream.h"
#include "qtextstream.h"
#include "qbuffer.h"
#include "qptrlist.h"
#include "qasyncimageio.h"
#include "qpngio.h"
#include "qmngio.h"
#include "qjpegio.h"
#include "qmap.h"
#include <private/qpluginmanager_p.h>
#include "qimageformatinterface_p.h"
#include "qwmatrix.h"
#include "qapplication.h"
#include "qmime.h"
#include "qdragobject.h"
#include <ctype.h>
#include <stdlib.h>
#ifdef Q_WS_QWS
#include "qgfx_qws.h"
#endif
// 16bpp images on supported on Qt/Embedded
#if !defined( Q_WS_QWS ) && !defined(QT_NO_IMAGE_16_BIT)
#define QT_NO_IMAGE_16_BIT
#endif
/*!
\class QImage
\brief The QImage class provides a hardware-independent pixmap
representation with direct access to the pixel data.
\ingroup images
\ingroup graphics
\ingroup shared
\mainclass
It is one of the two classes Qt provides for dealing with images,
the other being QPixmap. QImage is designed and optimized for I/O
and for direct pixel access/manipulation. QPixmap is designed and
optimized for drawing. There are (slow) functions to convert
between QImage and QPixmap: QPixmap::convertToImage() and
QPixmap::convertFromImage().
An image has the parameters \link width() width\endlink, \link
height() height\endlink and \link depth() depth\endlink (bits per
pixel, bpp), a color table and the actual \link bits()
pixels\endlink. QImage supports 1-bpp, 8-bpp and 32-bpp image
data. 1-bpp and 8-bpp images use a color lookup table; the pixel
value is a color table index.
32-bpp images encode an RGB value in 24 bits and ignore the color
table. The most significant byte is used for the \link
setAlphaBuffer() alpha buffer\endlink.
An entry in the color table is an RGB triplet encoded as a \c
uint. Use the \link ::qRed() qRed()\endlink, \link ::qGreen()
qGreen()\endlink and \link ::qBlue() qBlue()\endlink functions (\c
qcolor.h) to access the components, and \link ::qRgb()
qRgb\endlink to make an RGB triplet (see the QColor class
documentation).
1-bpp (monochrome) images have a color table with a most two
colors. There are two different formats: big endian (MSB first) or
little endian (LSB first) bit order. To access a single bit you
will must do some bit shifts:
\code
QImage image;
// sets bit at (x,y) to 1
if ( image.bitOrder() == QImage::LittleEndian )
*(image.scanLine(y) + (x >> 3)) |= 1 << (x & 7);
else
*(image.scanLine(y) + (x >> 3)) |= 1 << (7 - (x & 7));
\endcode
If this looks complicated, it might be a good idea to convert the
1-bpp image to an 8-bpp image using convertDepth().
8-bpp images are much easier to work with than 1-bpp images
because they have a single byte per pixel:
\code
QImage image;
// set entry 19 in the color table to yellow
image.setColor( 19, qRgb(255,255,0) );
// set 8 bit pixel at (x,y) to value yellow (in color table)
*(image.scanLine(y) + x) = 19;
\endcode
32-bpp images ignore the color table; instead, each pixel contains
the RGB triplet. 24 bits contain the RGB value; the most
significant byte is reserved for the alpha buffer.
\code
QImage image;
// sets 32 bit pixel at (x,y) to yellow.
uint *p = (uint *)image.scanLine(y) + x;
*p = qRgb(255,255,0);
\endcode
On Qt/Embedded, scanlines are aligned to the pixel depth and may
be padded to any degree, while on all other platforms, the
scanlines are 32-bit aligned for all depths. The constructor
taking a \c{uchar*} argument always expects 32-bit aligned data.
On Qt/Embedded, an additional constructor allows the number of
bytes-per-line to be specified.
QImage supports a variety of methods for getting information about
the image, for example, colorTable(), allGray(), isGrayscale(),
bitOrder(), bytesPerLine(), depth(), dotsPerMeterX() and
dotsPerMeterY(), hasAlphaBuffer(), numBytes(), numColors(), and
width() and height().
Pixel colors are retrieved with pixel() and set with setPixel().
QImage also supports a number of functions for creating a new
image that is a transformed version of the original. For example,
copy(), convertBitOrder(), convertDepth(), createAlphaMask(),
createHeuristicMask(), mirror(), scale(), smoothScale(), swapRGB()
and xForm(). There are also functions for changing attributes of
an image in-place, for example, setAlphaBuffer(), setColor(),
setDotsPerMeterX() and setDotsPerMeterY() and setNumColors().
Images can be loaded and saved in the supported formats. Images
are saved to a file with save(). Images are loaded from a file
with load() (or in the constructor) or from an array of data with
loadFromData(). The lists of supported formats are available from
inputFormatList() and outputFormatList().
Strings of text may be added to images using setText().
The QImage class uses explicit \link shclass.html sharing\endlink,
similar to that used by QMemArray.
New image formats can be added as \link plugins-howto.html
plugins\endlink.
\sa QImageIO QPixmap \link shclass.html Shared Classes\endlink
*/
/*!
\enum QImage::Endian
This enum type is used to describe the endianness of the CPU and
graphics hardware.
\value IgnoreEndian Endianness does not matter. Useful for some
operations that are independent of endianness.
\value BigEndian Network byte order, as on SPARC and Motorola CPUs.
\value LittleEndian PC/Alpha byte order.
*/
/*!
\enum Qt::ImageConversionFlags
The conversion flag is a bitwise-OR of the following values. The
options marked "(default)" are set if no other values from the
list are included (since the defaults are zero):
Color/Mono preference (ignored for QBitmap)
\value AutoColor (default) - If the image has \link
QImage::depth() depth\endlink 1 and contains only
black and white pixels, the pixmap becomes monochrome.
\value ColorOnly The pixmap is dithered/converted to the
\link QPixmap::defaultDepth() native display depth\endlink.
\value MonoOnly The pixmap becomes monochrome. If necessary,
it is dithered using the chosen dithering algorithm.
Dithering mode preference for RGB channels
\value DiffuseDither (default) - A high-quality dither.
\value OrderedDither A faster, more ordered dither.
\value ThresholdDither No dithering; closest color is used.
Dithering mode preference for alpha channel
\value ThresholdAlphaDither (default) - No dithering.
\value OrderedAlphaDither A faster, more ordered dither.
\value DiffuseAlphaDither A high-quality dither.
\value NoAlpha Not supported.
Color matching versus dithering preference
\value PreferDither (default when converting to a pixmap) - Always dither
32-bit images when the image is converted to 8 bits.
\value AvoidDither (default when converting for the purpose of saving to
file) - Dither 32-bit images only if the image has more than 256
colors and it is being converted to 8 bits.
\value AutoDither Not supported.
The following are not values that are used directly, but masks for
the above classes:
\value ColorMode_Mask Mask for the color mode.
\value Dither_Mask Mask for the dithering mode for RGB channels.
\value AlphaDither_Mask Mask for the dithering mode for the alpha channel.
\value DitherMode_Mask Mask for the mode that determines the preference of
color matching versus dithering.
Using 0 as the conversion flag sets all the default options.
*/
#if defined(Q_CC_DEC) && defined(__alpha) && (__DECCXX_VER-0 >= 50190001)
#pragma message disable narrowptr
#endif
#ifndef QT_NO_IMAGE_TEXT
class QImageDataMisc {
public:
QImageDataMisc() { }
QImageDataMisc( const QImageDataMisc& o ) :
text_lang(o.text_lang) { }
QImageDataMisc& operator=(const QImageDataMisc& o)
{
text_lang = o.text_lang;
return *this;
}
QValueList<QImageTextKeyLang> list()
{
return text_lang.keys();
}
QStringList languages()
{
QStringList r;
QMap<QImageTextKeyLang,QString>::Iterator it = text_lang.begin();
for ( ; it != text_lang.end(); ++it ) {
r.remove( it.key().lang );
r.append( it.key().lang );
}
return r;
}
QStringList keys()
{
QStringList r;
QMap<QImageTextKeyLang,QString>::Iterator it = text_lang.begin();
for ( ; it != text_lang.end(); ++it ) {
r.remove( it.key().key );
r.append( it.key().key );
}
return r;
}
QMap<QImageTextKeyLang,QString> text_lang;
};
#endif // QT_NO_IMAGE_TEXT
/*****************************************************************************
QImage member functions
*****************************************************************************/
// table to flip bits
static const uchar bitflip[256] = {
/*
open OUT, "| fmt";
for $i (0..255) {
print OUT (($i >> 7) & 0x01) | (($i >> 5) & 0x02) |
(($i >> 3) & 0x04) | (($i >> 1) & 0x08) |
(($i << 7) & 0x80) | (($i << 5) & 0x40) |
(($i << 3) & 0x20) | (($i << 1) & 0x10), ", ";
}
close OUT;
*/
0, 128, 64, 192, 32, 160, 96, 224, 16, 144, 80, 208, 48, 176, 112, 240,
8, 136, 72, 200, 40, 168, 104, 232, 24, 152, 88, 216, 56, 184, 120, 248,
4, 132, 68, 196, 36, 164, 100, 228, 20, 148, 84, 212, 52, 180, 116, 244,
12, 140, 76, 204, 44, 172, 108, 236, 28, 156, 92, 220, 60, 188, 124, 252,
2, 130, 66, 194, 34, 162, 98, 226, 18, 146, 82, 210, 50, 178, 114, 242,
10, 138, 74, 202, 42, 170, 106, 234, 26, 154, 90, 218, 58, 186, 122, 250,
6, 134, 70, 198, 38, 166, 102, 230, 22, 150, 86, 214, 54, 182, 118, 246,
14, 142, 78, 206, 46, 174, 110, 238, 30, 158, 94, 222, 62, 190, 126, 254,
1, 129, 65, 193, 33, 161, 97, 225, 17, 145, 81, 209, 49, 177, 113, 241,
9, 137, 73, 201, 41, 169, 105, 233, 25, 153, 89, 217, 57, 185, 121, 249,
5, 133, 69, 197, 37, 165, 101, 229, 21, 149, 85, 213, 53, 181, 117, 245,
13, 141, 77, 205, 45, 173, 109, 237, 29, 157, 93, 221, 61, 189, 125, 253,
3, 131, 67, 195, 35, 163, 99, 227, 19, 147, 83, 211, 51, 179, 115, 243,
11, 139, 75, 203, 43, 171, 107, 235, 27, 155, 91, 219, 59, 187, 123, 251,
7, 135, 71, 199, 39, 167, 103, 231, 23, 151, 87, 215, 55, 183, 119, 247,
15, 143, 79, 207, 47, 175, 111, 239, 31, 159, 95, 223, 63, 191, 127, 255
};
const uchar *qt_get_bitflip_array() // called from QPixmap code
{
return bitflip;
}
/*!
Constructs a null image.
\sa isNull()
*/
QImage::QImage()
{
init();
}
/*!
Constructs an image with \a w width, \a h height, \a depth bits
per pixel, \a numColors colors and bit order \a bitOrder.
Using this constructor is the same as first constructing a null
image and then calling the create() function.
\sa create()
*/
QImage::QImage( int w, int h, int depth, int numColors, Endian bitOrder )
{
init();
create( w, h, depth, numColors, bitOrder );
}
/*!
Constructs an image with size \a size pixels, depth \a depth bits,
\a numColors and \a bitOrder endianness.
Using this constructor is the same as first constructing a null
image and then calling the create() function.
\sa create()
*/
QImage::QImage( const QSize& size, int depth, int numColors, Endian bitOrder )
{
init();
create( size, depth, numColors, bitOrder );
}
#ifndef QT_NO_IMAGEIO
/*!
Constructs an image and tries to load the image from the file \a
fileName.
If \a format is specified, the loader attempts to read the image
using the specified format. If \a format is not specified (which
is the default), the loader reads a few bytes from the header to
guess the file format.
If the loading of the image failed, this object is a \link
isNull() null\endlink image.
The QImageIO documentation lists the supported image formats and
explains how to add extra formats.
\sa load() isNull() QImageIO
*/
QImage::QImage( const QString &fileName, const char* format )
{
init();
load( fileName, format );
}
#ifndef QT_NO_IMAGEIO_XPM
// helper
static void read_xpm_image_or_array( QImageIO *, const char * const *, QImage & );
#endif
/*!
Constructs an image from \a xpm, which must be a valid XPM image.
Errors are silently ignored.
Note that it's possible to squeeze the XPM variable a little bit
by using an unusual declaration:
\code
static const char * const start_xpm[]={
"16 15 8 1",
"a c #cec6bd",
....
\endcode
The extra \c const makes the entire definition read-only, which is
slightly more efficient (e.g. when the code is in a shared
library) and ROMable when the application is to be stored in ROM.
*/
QImage::QImage( const char * const xpm[] )
{
init();
#ifndef QT_NO_IMAGEIO_XPM
read_xpm_image_or_array( 0, xpm, *this );
#else
Undo prior accidental commit
13 years ago
// We use a qFatal rather than disabling the whole function, as this
Add Qt3 development HEAD version
14 years ago
// constructor may be ambiguous.
Undo prior accidental commit
13 years ago
qFatal("XPM not supported");
Add Qt3 development HEAD version
14 years ago
#endif
}
/*!
Constructs an image from the binary data \a array. It tries to
guess the file format.
If the loading of the image failed, this object is a \link
isNull() null\endlink image.
\sa loadFromData() isNull() imageFormat()
*/
QImage::QImage( const QByteArray &array )
{
init();
loadFromData(array);
}
#endif //QT_NO_IMAGEIO
/*!
Constructs a \link shclass.html shallow copy\endlink of \a image.
*/
QImage::QImage( const QImage &image )
{
data = image.data;
data->ref();
}
/*!
Constructs an image \a w pixels wide, \a h pixels high with a
color depth of \a depth, that uses an existing memory buffer, \a
yourdata. The buffer must remain valid throughout the life of the
QImage. The image does not delete the buffer at destruction.
If \a colortable is 0, a color table sufficient for \a numColors
will be allocated (and destructed later).
Note that \a yourdata must be 32-bit aligned.
The endianness is given in \a bitOrder.
*/
QImage::QImage( uchar* yourdata, int w, int h, int depth,
QRgb* colortable, int numColors,
Endian bitOrder )
{
init();
int bpl = ((w*depth+31)/32)*4; // bytes per scanline
if ( w <= 0 || h <= 0 || depth <= 0 || numColors < 0
|| INT_MAX / sizeof(uchar *) < uint(h)
|| INT_MAX / uint(depth) < uint(w)
|| bpl <= 0
|| INT_MAX / uint(bpl) < uint(h) )
return; // invalid parameter(s)
data->w = w;
data->h = h;
data->d = depth;
data->ncols = depth != 32 ? numColors : 0;
if ( !yourdata )
return; // Image header info can be saved without needing to allocate memory.
data->nbytes = bpl*h;
if ( colortable || !data->ncols ) {
data->ctbl = colortable;
data->ctbl_mine = FALSE;
} else {
// calloc since we realloc, etc. later (ick)
data->ctbl = (QRgb*)calloc( data->ncols*sizeof(QRgb), data->ncols );
Q_CHECK_PTR(data->ctbl);
data->ctbl_mine = TRUE;
}
uchar** jt = (uchar**)malloc(h*sizeof(uchar*));
Q_CHECK_PTR(jt);
for (int j=0; j<h; j++) {
jt[j] = yourdata+j*bpl;
}
data->bits = jt;
data->bitordr = bitOrder;
}
#ifdef Q_WS_QWS
/*!
Constructs an image that uses an existing memory buffer. The
buffer must remain valid for the life of the QImage. The image
does not delete the buffer at destruction. The buffer is passed as
\a yourdata. The image's width is \a w and its height is \a h. The
color depth is \a depth. \a bpl specifies the number of bytes per
line.
If \a colortable is 0, a color table sufficient for \a numColors
will be allocated (and destructed later).
The endianness is specified by \a bitOrder.
\warning This constructor is only available on Qt/Embedded.
*/
QImage::QImage( uchar* yourdata, int w, int h, int depth,
int bpl, QRgb* colortable, int numColors,
Endian bitOrder )
{
init();
if ( !yourdata || w <= 0 || h <= 0 || depth <= 0 || numColors < 0
|| INT_MAX / sizeof(uchar *) < uint(h)
|| INT_MAX / uint(bpl) < uint(h)
)
return; // invalid parameter(s)
data->w = w;
data->h = h;
data->d = depth;
data->ncols = numColors;
data->nbytes = bpl * h;
if ( colortable || !numColors ) {
data->ctbl = colortable;
data->ctbl_mine = FALSE;
} else {
// calloc since we realloc, etc. later (ick)
data->ctbl = (QRgb*)calloc( numColors*sizeof(QRgb), numColors );
Q_CHECK_PTR(data->ctbl);
data->ctbl_mine = TRUE;
}
uchar** jt = (uchar**)malloc(h*sizeof(uchar*));
Q_CHECK_PTR(jt);
for (int j=0; j<h; j++) {
jt[j] = yourdata+j*bpl;
}
data->bits = jt;
data->bitordr = bitOrder;
}
#endif // Q_WS_QWS
/*!
Destroys the image and cleans up.
*/
QImage::~QImage()
{
if ( data && data->deref() ) {
reset();
delete data;
}
}
/*! Convenience function. Gets the data associated with the absolute
name \a abs_name from the default mime source factory and decodes it
to an image.
\sa QMimeSourceFactory, QImage::fromMimeSource(), QImageDrag::decode()
*/
#ifndef QT_NO_MIME
QImage QImage::fromMimeSource( const QString &abs_name )
{
const QMimeSource *m = QMimeSourceFactory::defaultFactory()->data( abs_name );
if ( !m ) {
#if defined(QT_CHECK_STATE)
Undo prior accidental commit
13 years ago
qWarning("QImage::fromMimeSource: Cannot find image \"%s\" in the mime source factory", abs_name.latin1() );
Add Qt3 development HEAD version
14 years ago
#endif
return QImage();
}
QImage img;
QImageDrag::decode( m, img );
return img;
}
#endif
/*!
Assigns a \link shclass.html shallow copy\endlink of \a image to
this image and returns a reference to this image.
\sa copy()
*/
QImage &QImage::operator=( const QImage &image )
{
image.data->ref(); // avoid 'x = x'
if ( data->deref() ) {
reset();
delete data;
}
data = image.data;
return *this;
}
/*!
\overload
Sets the image bits to the \a pixmap contents and returns a
reference to the image.
If the image shares data with other images, it will first
dereference the shared data.
Makes a call to QPixmap::convertToImage().
*/
QImage &QImage::operator=( const QPixmap &pixmap )
{
*this = pixmap.convertToImage();
return *this;
}
/*!
Detaches from shared image data and makes sure that this image is
the only one referring to the data.
If multiple images share common data, this image makes a copy of
the data and detaches itself from the sharing mechanism.
Nothing is done if there is just a single reference.
\sa copy()
*/
void QImage::detach()
{
if ( data->count != 1 )
*this = copy();
}
/*!
Returns a \link shclass.html deep copy\endlink of the image.
\sa detach()
*/
QImage QImage::copy() const
{
if ( isNull() ) {
// maintain the fields of invalid QImages when copied
return QImage( 0, width(), height(), depth(), colorTable(), numColors(), bitOrder() );
} else {
QImage image;
image.create( width(), height(), depth(), numColors(), bitOrder() );
#ifdef Q_WS_QWS
// Qt/Embedded can create images with non-default bpl
// make sure we don't crash.
if ( image.numBytes() != numBytes() )
for ( int i = 0; i < height(); i++ )
memcpy( image.scanLine(i), scanLine(i), image.bytesPerLine() );
else
#endif
memcpy( image.bits(), bits(), numBytes() );
memcpy( image.colorTable(), colorTable(), numColors() * sizeof(QRgb) );
image.setAlphaBuffer( hasAlphaBuffer() );
image.data->dpmx = dotsPerMeterX();
image.data->dpmy = dotsPerMeterY();
image.data->offset = offset();
#ifndef QT_NO_IMAGE_TEXT
if ( data->misc ) {
image.data->misc = new QImageDataMisc;
*image.data->misc = misc();
}
#endif
return image;
}
}
/*!
\overload
Returns a \link shclass.html deep copy\endlink of a sub-area of
the image.
The returned image is always \a w by \a h pixels in size, and is
copied from position \a x, \a y in this image. In areas beyond
this image pixels are filled with pixel 0.
If the image needs to be modified to fit in a lower-resolution
result (e.g. converting from 32-bit to 8-bit), use the \a
conversion_flags to specify how you'd prefer this to happen.
\sa bitBlt() Qt::ImageConversionFlags
*/
QImage QImage::copy(int x, int y, int w, int h, int conversion_flags) const
{
int dx = 0;
int dy = 0;
if ( w <= 0 || h <= 0 ) return QImage(); // Nothing to copy
QImage image( w, h, depth(), numColors(), bitOrder() );
if ( x < 0 || y < 0 || x + w > width() || y + h > height() ) {
// bitBlt will not cover entire image - clear it.
// ### should deal with each side separately for efficiency
image.fill(0);
if ( x < 0 ) {
dx = -x;
x = 0;
}
if ( y < 0 ) {
dy = -y;
y = 0;
}
}
bool has_alpha = hasAlphaBuffer();
if ( has_alpha ) {
// alpha channel should be only copied, not used by bitBlt(), and
// this is mutable, we will restore the image state before returning
QImage *that = (QImage *) this;
that->setAlphaBuffer( FALSE );
}
memcpy( image.colorTable(), colorTable(), numColors()*sizeof(QRgb) );
bitBlt( &image, dx, dy, this, x, y, -1, -1, conversion_flags );
if ( has_alpha ) {
// restore image state
QImage *that = (QImage *) this;
that->setAlphaBuffer( TRUE );
}
image.setAlphaBuffer(hasAlphaBuffer());
image.data->dpmx = dotsPerMeterX();
image.data->dpmy = dotsPerMeterY();
image.data->offset = offset();
#ifndef QT_NO_IMAGE_TEXT
if ( data->misc ) {
image.data->misc = new QImageDataMisc;
*image.data->misc = misc();
}
#endif
return image;
}
/*!
\overload QImage QImage::copy(const QRect& r) const
Returns a \link shclass.html deep copy\endlink of a sub-area of
the image.
The returned image always has the size of the rectangle \a r. In
areas beyond this image pixels are filled with pixel 0.
*/
/*!
\fn bool QImage::isNull() const
Returns TRUE if it is a null image; otherwise returns FALSE.
A null image has all parameters set to zero and no allocated data.
*/
/*!
\fn int QImage::width() const
Returns the width of the image.
\sa height() size() rect()
*/
/*!
\fn int QImage::height() const
Returns the height of the image.
\sa width() size() rect()
*/
/*!
\fn QSize QImage::size() const
Returns the size of the image, i.e. its width and height.
\sa width() height() rect()
*/
/*!
\fn QRect QImage::rect() const
Returns the enclosing rectangle (0, 0, width(), height()) of the
image.
\sa width() height() size()
*/
/*!
\fn int QImage::depth() const
Returns the depth of the image.
The image depth is the number of bits used to encode a single
pixel, also called bits per pixel (bpp) or bit planes of an image.
The supported depths are 1, 8, 16 (Qt/Embedded only) and 32.
\sa convertDepth()
*/
/*!
\fn int QImage::numColors() const
Returns the size of the color table for the image.
Notice that numColors() returns 0 for 16-bpp (Qt/Embedded only)
and 32-bpp images because these images do not use color tables,
but instead encode pixel values as RGB triplets.
\sa setNumColors() colorTable()
*/
/*!
\fn QImage::Endian QImage::bitOrder() const
Returns the bit order for the image.
If it is a 1-bpp image, this function returns either
QImage::BigEndian or QImage::LittleEndian.
If it is not a 1-bpp image, this function returns
QImage::IgnoreEndian.
\sa depth()
*/
/*!
\fn uchar **QImage::jumpTable() const
Returns a pointer to the scanline pointer table.
This is the beginning of the data block for the image.
\sa bits() scanLine()
*/
/*!
\fn QRgb *QImage::colorTable() const
Returns a pointer to the color table.
\sa numColors()
*/
/*!
\fn int QImage::numBytes() const
Returns the number of bytes occupied by the image data.
\sa bytesPerLine() bits()
*/
/*!
\fn int QImage::bytesPerLine() const
Returns the number of bytes per image scanline. This is equivalent
to numBytes()/height().
\sa numBytes() scanLine()
*/
/*!
\fn QRgb QImage::color( int i ) const
Returns the color in the color table at index \a i. The first
color is at index 0.
A color value is an RGB triplet. Use the \link ::qRed()
qRed()\endlink, \link ::qGreen() qGreen()\endlink and \link
::qBlue() qBlue()\endlink functions (defined in \c qcolor.h) to
get the color value components.
\sa setColor() numColors() QColor
*/
/*!
\fn void QImage::setColor( int i, QRgb c )
Sets a color in the color table at index \a i to \a c.
A color value is an RGB triplet. Use the \link ::qRgb()
qRgb()\endlink function (defined in \c qcolor.h) to make RGB
triplets.
\sa color() setNumColors() numColors()
*/
/*!
\fn uchar *QImage::scanLine( int i ) const
Returns a pointer to the pixel data at the scanline with index \a
i. The first scanline is at index 0.
The scanline data is aligned on a 32-bit boundary.
\warning If you are accessing 32-bpp image data, cast the returned
pointer to \c{QRgb*} (QRgb has a 32-bit size) and use it to
read/write the pixel value. You cannot use the \c{uchar*} pointer
directly, because the pixel format depends on the byte order on
the underlying platform. Hint: use \link ::qRed() qRed()\endlink,
\link ::qGreen() qGreen()\endlink and \link ::qBlue()
qBlue()\endlink, etc. (qcolor.h) to access the pixels.
\warning If you are accessing 16-bpp image data, you must handle
endianness yourself. (Qt/Embedded only)
\sa bytesPerLine() bits() jumpTable()
*/
/*!
\fn uchar *QImage::bits() const
Returns a pointer to the first pixel data. This is equivalent to
scanLine(0).
\sa numBytes() scanLine() jumpTable()
*/
void QImage::warningIndexRange( const char *func, int i )
{
#if defined(QT_CHECK_RANGE)
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qWarning( "QImage::%s: Index %d out of range", func, i );
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#else
Q_UNUSED( func )
Q_UNUSED( i )
#endif
}
/*!
Resets all image parameters and deallocates the image data.
*/
void QImage::reset()
{
freeBits();
setNumColors( 0 );
#ifndef QT_NO_IMAGE_TEXT
delete data->misc;
#endif
reinit();
}
/*!
Fills the entire image with the pixel value \a pixel.
If the \link depth() depth\endlink of this image is 1, only the
lowest bit is used. If you say fill(0), fill(2), etc., the image
is filled with 0s. If you say fill(1), fill(3), etc., the image is
filled with 1s. If the depth is 8, the lowest 8 bits are used.
If the depth is 32 and the image has no alpha buffer, the \a pixel
value is written to each pixel in the image. If the image has an
alpha buffer, only the 24 RGB bits are set and the upper 8 bits
(alpha value) are left unchanged.
Note: QImage::pixel() returns the color of the pixel at the given
coordinates; QColor::pixel() returns the pixel value of the
underlying window system (essentially an index value), so normally
you will want to use QImage::pixel() to use a color from an
existing image or QColor::rgb() to use a specific color.
\sa invertPixels() depth() hasAlphaBuffer() create()
*/
void QImage::fill( uint pixel )
{
if ( depth() == 1 || depth() == 8 ) {
if ( depth() == 1 ) {
if ( pixel & 1 )
pixel = 0xffffffff;
else
pixel = 0;
} else {
uint c = pixel & 0xff;
pixel = c | ((c << 8) & 0xff00) | ((c << 16) & 0xff0000) |
((c << 24) & 0xff000000);
}
int bpl = bytesPerLine();
for ( int i=0; i<height(); i++ )
memset( scanLine(i), pixel, bpl );
#ifndef QT_NO_IMAGE_16_BIT
} else if ( depth() == 16 ) {
for ( int i=0; i<height(); i++ ) {
//optimize with 32-bit writes, since image is always aligned
uint *p = (uint *)scanLine(i);
uint *end = (uint*)(((ushort*)p) + width());
uint fill;
ushort *f = (ushort*)&fill;
f[0]=pixel;
f[1]=pixel;
while ( p < end )
*p++ = fill;
}
#endif // QT_NO_IMAGE_16_BIT
#ifndef QT_NO_IMAGE_TRUECOLOR
} else if ( depth() == 32 ) {
if ( hasAlphaBuffer() ) {
pixel &= 0x00ffffff;
for ( int i=0; i<height(); i++ ) {
uint *p = (uint *)scanLine(i);
uint *end = p + width();
while ( p < end ) {
*p = (*p & 0xff000000) | pixel;
p++;
}
}
} else {
for ( int i=0; i<height(); i++ ) {
uint *p = (uint *)scanLine(i);
uint *end = p + width();
while ( p < end )
*p++ = pixel;
}
}
#endif // QT_NO_IMAGE_TRUECOLOR
}
}
/*!
Inverts all pixel values in the image.
If the depth is 32: if \a invertAlpha is TRUE, the alpha bits are
also inverted, otherwise they are left unchanged.
If the depth is not 32, the argument \a invertAlpha has no
meaning.
Note that inverting an 8-bit image means to replace all pixels
using color index \e i with a pixel using color index 255 minus \e
i. Similarly for a 1-bit image. The color table is not changed.
\sa fill() depth() hasAlphaBuffer()
*/
void QImage::invertPixels( bool invertAlpha )
{
Q_UINT32 n = numBytes();
if ( n % 4 ) {
Q_UINT8 *p = (Q_UINT8*)bits();
Q_UINT8 *end = p + n;
while ( p < end )
*p++ ^= 0xff;
} else {
Q_UINT32 *p = (Q_UINT32*)bits();
Q_UINT32 *end = p + n/4;
uint xorbits = invertAlpha && depth() == 32 ? 0x00ffffff : 0xffffffff;
while ( p < end )
*p++ ^= xorbits;
}
}
/*!
Determines the host computer byte order. Returns
QImage::LittleEndian (LSB first) or QImage::BigEndian (MSB first).
\sa systemBitOrder()
*/
QImage::Endian QImage::systemByteOrder()
{
static Endian sbo = IgnoreEndian;
if ( sbo == IgnoreEndian ) { // initialize
int ws;
bool be;
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qSysInfo( &ws, &be );
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sbo = be ? BigEndian : LittleEndian;
}
return sbo;
}
#if defined(Q_WS_X11)
#include <X11/Xlib.h> // needed for systemBitOrder
#include <X11/Xutil.h>
#include <X11/Xos.h>
#if defined(Q_OS_WIN32)
#undef open
#undef close
#undef read
#undef write
#endif
#endif
// POSIX Large File Support redefines open -> open64
#if defined(open)
# undef open
#endif
// POSIX Large File Support redefines truncate -> truncate64
#if defined(truncate)
# undef truncate
#endif
/*!
Determines the bit order of the display hardware. Returns
QImage::LittleEndian (LSB first) or QImage::BigEndian (MSB first).
\sa systemByteOrder()
*/
QImage::Endian QImage::systemBitOrder()
{
#if defined(Q_WS_X11)
return BitmapBitOrder(qt_xdisplay()) == MSBFirst ? BigEndian :LittleEndian;
#else
return BigEndian;
#endif
}
/*!
Resizes the color table to \a numColors colors.
If the color table is expanded all the extra colors will be set to
black (RGB 0,0,0).
\sa numColors() color() setColor() colorTable()
*/
void QImage::setNumColors( int numColors )
{
if ( numColors == data->ncols )
return;
if ( numColors == 0 ) { // use no color table
if ( data->ctbl ) {
if ( data->ctbl_mine )
free( data->ctbl );
else
data->ctbl_mine = TRUE;
data->ctbl = 0;
}
data->ncols = 0;
return;
}
if ( data->ctbl && data->ctbl_mine ) { // already has color table
data->ctbl = (QRgb*)realloc( data->ctbl, numColors*sizeof(QRgb) );
if ( data->ctbl && numColors > data->ncols )
memset( (char *)&data->ctbl[data->ncols], 0,
(numColors-data->ncols)*sizeof(QRgb) );
} else { // create new color table
data->ctbl = (QRgb*)calloc( numColors*sizeof(QRgb), 1 );
Q_CHECK_PTR(data->ctbl);
data->ctbl_mine = TRUE;
}
data->ncols = data->ctbl == 0 ? 0 : numColors;
}
/*!
\fn bool QImage::hasAlphaBuffer() const
Returns TRUE if alpha buffer mode is enabled; otherwise returns
FALSE.
\sa setAlphaBuffer()
*/
/*!
Enables alpha buffer mode if \a enable is TRUE, otherwise disables
it. The default setting is disabled.
An 8-bpp image has 8-bit pixels. A pixel is an index into the
\link color() color table\endlink, which contains 32-bit color
values. In a 32-bpp image, the 32-bit pixels are the color values.
This 32-bit value is encoded as follows: The lower 24 bits are
used for the red, green, and blue components. The upper 8 bits
contain the alpha component.
The alpha component specifies the transparency of a pixel. 0 means
completely transparent and 255 means opaque. The alpha component
is ignored if you do not enable alpha buffer mode.
The alpha buffer is used to set a mask when a QImage is translated
to a QPixmap.
\sa hasAlphaBuffer() createAlphaMask()
*/
void QImage::setAlphaBuffer( bool enable )
{
data->alpha = enable;
}
/*!
Sets the image \a width, \a height, \a depth, its number of colors
(in \a numColors), and bit order. Returns TRUE if successful, or
FALSE if the parameters are incorrect or if memory cannot be
allocated.
The \a width and \a height is limited to 32767. \a depth must be
1, 8, or 32. If \a depth is 1, \a bitOrder must be set to
either QImage::LittleEndian or QImage::BigEndian. For other depths
\a bitOrder must be QImage::IgnoreEndian.
This function allocates a color table and a buffer for the image
data. The image data is not initialized.
The image buffer is allocated as a single block that consists of a
table of \link scanLine() scanline\endlink pointers (jumpTable())
and the image data (bits()).
\sa fill() width() height() depth() numColors() bitOrder()
jumpTable() scanLine() bits() bytesPerLine() numBytes()
*/
bool QImage::create( int width, int height, int depth, int numColors,
Endian bitOrder )
{
reset(); // reset old data
if ( width <= 0 || height <= 0 || depth <= 0 || numColors < 0 )
return FALSE; // invalid parameter(s)
if ( depth == 1 && bitOrder == IgnoreEndian ) {
#if defined(QT_CHECK_RANGE)
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qWarning( "QImage::create: Bit order is required for 1 bpp images" );
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#endif
return FALSE;
}
if ( depth != 1 )
bitOrder = IgnoreEndian;
#if defined(QT_CHECK_RANGE)
if ( depth == 24 )
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qWarning( "QImage::create: 24-bpp images no longer supported, "
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"use 32-bpp instead" );
#endif
switch ( depth ) {
case 1:
case 8:
#ifndef QT_NO_IMAGE_16_BIT
case 16:
#endif
#ifndef QT_NO_IMAGE_TRUECOLOR
case 32:
#endif
break;
default: // invalid depth
return FALSE;
}
if ( depth == 32 )
numColors = 0;
setNumColors( numColors );
if ( data->ncols != numColors ) // could not alloc color table
return FALSE;
if ( INT_MAX / uint(depth) < uint(width) ) { // sanity check for potential overflow
setNumColors( 0 );
return FALSE;
}
// Qt/Embedded doesn't waste memory on unnecessary padding.
#ifdef Q_WS_QWS
const int bpl = (width*depth+7)/8; // bytes per scanline
const int pad = 0;
#else
const int bpl = ((width*depth+31)/32)*4; // bytes per scanline
// #### WWA: shouldn't this be (width*depth+7)/8:
const int pad = bpl - (width*depth)/8; // pad with zeros
#endif
if ( INT_MAX / uint(bpl) < uint(height)
|| bpl < 0
|| INT_MAX / sizeof(uchar *) < uint(height) ) { // sanity check for potential overflow
setNumColors( 0 );
return FALSE;
}
int nbytes = bpl*height; // image size
int ptbl = height*sizeof(uchar*); // pointer table size
int size = nbytes + ptbl; // total size of data block
uchar **p = (uchar **)malloc( size ); // alloc image bits
Q_CHECK_PTR(p);
if ( !p ) { // no memory
setNumColors( 0 );
return FALSE;
}
data->w = width;
data->h = height;
data->d = depth;
data->nbytes = nbytes;
data->bitordr = bitOrder;
data->bits = p; // set image pointer
//uchar *d = (uchar*)p + ptbl; // setup scanline pointers
uchar *d = (uchar*)(p + height); // setup scanline pointers
while ( height-- ) {
*p++ = d;
if ( pad )
memset( d+bpl-pad, 0, pad );
d += bpl;
}
return TRUE;
}
/*!
\overload bool QImage::create( const QSize&, int depth, int numColors, Endian bitOrder )
*/
bool QImage::create( const QSize& size, int depth, int numColors,
QImage::Endian bitOrder )
{
return create(size.width(), size.height(), depth, numColors, bitOrder);
}
/*!
\internal
Initializes the image data structure.
*/
void QImage::init()
{
data = new QImageData;
Q_CHECK_PTR( data );
reinit();
}
void QImage::reinit()
{
data->w = data->h = data->d = data->ncols = 0;
data->nbytes = 0;
data->ctbl = 0;
data->bits = 0;
data->bitordr = QImage::IgnoreEndian;
data->alpha = FALSE;
#ifndef QT_NO_IMAGE_TEXT
data->misc = 0;
#endif
data->dpmx = 0;
data->dpmy = 0;
data->offset = QPoint(0,0);
}
/*!
\internal
Deallocates the image data and sets the bits pointer to 0.
*/
void QImage::freeBits()
{
if ( data->bits ) { // dealloc image bits
free( data->bits );
data->bits = 0;
}
}
/*****************************************************************************
Internal routines for converting image depth.
*****************************************************************************/
//
// convert_32_to_8: Converts a 32 bits depth (true color) to an 8 bit
// image with a colormap. If the 32 bit image has more than 256 colors,
// we convert the red,green and blue bytes into a single byte encoded
// as 6 shades of each of red, green and blue.
//
// if dithering is needed, only 1 color at most is available for alpha.
//
#ifndef QT_NO_IMAGE_TRUECOLOR
struct QRgbMap {
QRgbMap() : rgb(0xffffffff) { }
bool used() const { return rgb!=0xffffffff; }
uchar pix;
QRgb rgb;
};
static bool convert_32_to_8( const QImage *src, QImage *dst, int conversion_flags, QRgb* palette=0, int palette_count=0 )
{
Removed explicit usage of the 'register' keyword. Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
5 years ago
QRgb *p;
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uchar *b;
bool do_quant = FALSE;
int y, x;
if ( !dst->create(src->width(), src->height(), 8, 256) )
return FALSE;
const int tablesize = 997; // prime
QRgbMap table[tablesize];
int pix=0;
QRgb amask = src->hasAlphaBuffer() ? 0xffffffff : 0x00ffffff;
if ( src->hasAlphaBuffer() )
dst->setAlphaBuffer(TRUE);
if ( palette ) {
// Preload palette into table.
p = palette;
// Almost same code as pixel insertion below
while ( palette_count-- > 0 ) {
// Find in table...
int hash = (*p & amask) % tablesize;
for (;;) {
if ( table[hash].used() ) {
if ( table[hash].rgb == (*p & amask) ) {
// Found previous insertion - use it
break;
} else {
// Keep searching...
if (++hash == tablesize) hash = 0;
}
} else {
// Cannot be in table
Q_ASSERT ( pix != 256 ); // too many colors
// Insert into table at this unused position
dst->setColor( pix, (*p & amask) );
table[hash].pix = pix++;
table[hash].rgb = *p & amask;
break;
}
}
p++;
}
}
if ( (conversion_flags & Qt::DitherMode_Mask) == Qt::PreferDither ) {
do_quant = TRUE;
} else {
for ( y=0; y<src->height(); y++ ) { // check if <= 256 colors
p = (QRgb *)src->scanLine(y);
b = dst->scanLine(y);
x = src->width();
while ( x-- ) {
// Find in table...
int hash = (*p & amask) % tablesize;
for (;;) {
if ( table[hash].used() ) {
if ( table[hash].rgb == (*p & amask) ) {
// Found previous insertion - use it
break;
} else {
// Keep searching...
if (++hash == tablesize) hash = 0;
}
} else {
// Cannot be in table
if ( pix == 256 ) { // too many colors
do_quant = TRUE;
// Break right out
x = 0;
y = src->height();
} else {
// Insert into table at this unused position
dst->setColor( pix, (*p & amask) );
table[hash].pix = pix++;
table[hash].rgb = (*p & amask);
}
break;
}
}
*b++ = table[hash].pix; // May occur once incorrectly
p++;
}
}
}
int ncols = do_quant ? 256 : pix;
static uint bm[16][16];
static int init=0;
if (!init) {
// Build a Bayer Matrix for dithering
init = 1;
int n, i, j;
bm[0][0]=0;
for (n=1; n<16; n*=2) {
for (i=0; i<n; i++) {
for (j=0; j<n; j++) {
bm[i][j]*=4;
bm[i+n][j]=bm[i][j]+2;
bm[i][j+n]=bm[i][j]+3;
bm[i+n][j+n]=bm[i][j]+1;
}
}
}
for (i=0; i<16; i++)
for (j=0; j<16; j++)
bm[i][j]<<=8;
}
dst->setNumColors( ncols );
if ( do_quant ) { // quantization needed
#define MAX_R 5
#define MAX_G 5
#define MAX_B 5
#define INDEXOF(r,g,b) (((r)*(MAX_G+1)+(g))*(MAX_B+1)+(b))
int rc, gc, bc;
for ( rc=0; rc<=MAX_R; rc++ ) // build 6x6x6 color cube
for ( gc=0; gc<=MAX_G; gc++ )
for ( bc=0; bc<=MAX_B; bc++ ) {
dst->setColor( INDEXOF(rc,gc,bc),
(amask&0xff000000)
| qRgb( rc*255/MAX_R, gc*255/MAX_G, bc*255/MAX_B ) );
}
int sw = src->width();
int* line1[3];
int* line2[3];
int* pv[3];
if ( ( conversion_flags & Qt::Dither_Mask ) == Qt::DiffuseDither ) {
Fix overwriting memory for an application icon This resolves Bug 2033
11 years ago
line1[0] = new int[sw];
line2[0] = new int[sw];
line1[1] = new int[sw];
line2[1] = new int[sw];
line1[2] = new int[sw];
line2[2] = new int[sw];
Add Qt3 development HEAD version
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pv[0] = new int[sw];
pv[1] = new int[sw];
pv[2] = new int[sw];
}
for ( y=0; y < src->height(); y++ ) {
p = (QRgb *)src->scanLine(y);
b = dst->scanLine(y);
QRgb *end = p + sw;
// perform quantization
if ( ( conversion_flags & Qt::Dither_Mask ) == Qt::ThresholdDither ) {
#define DITHER(p,m) ((uchar) ((p * (m) + 127) / 255))
while ( p < end ) {
rc = qRed( *p );
gc = qGreen( *p );
bc = qBlue( *p );
*b++ =
INDEXOF(
DITHER(rc, MAX_R),
DITHER(gc, MAX_G),
DITHER(bc, MAX_B)
);
p++;
}
#undef DITHER
} else if ( ( conversion_flags & Qt::Dither_Mask ) == Qt::OrderedDither ) {
#define DITHER(p,d,m) ((uchar) ((((256 * (m) + (m) + 1)) * (p) + (d)) / 65536 ))
int x = 0;
while ( p < end ) {
uint d = bm[y&15][x&15];
rc = qRed( *p );
gc = qGreen( *p );
bc = qBlue( *p );
*b++ =
INDEXOF(
DITHER(rc, d, MAX_R),
DITHER(gc, d, MAX_G),
DITHER(bc, d, MAX_B)
);
p++;
x++;
}
#undef DITHER
} else { // Diffuse
int endian = (QImage::systemByteOrder() == QImage::BigEndian);
int x;
uchar* q = src->scanLine(y);
uchar* q2 = src->scanLine(y+1 < src->height() ? y + 1 : 0);
for (int chan = 0; chan < 3; chan++) {
b = dst->scanLine(y);
int *l1 = (y&1) ? line2[chan] : line1[chan];
int *l2 = (y&1) ? line1[chan] : line2[chan];
if ( y == 0 ) {
for (int i=0; i<sw; i++)
l1[i] = q[i*4+chan+endian];
}
if ( y+1 < src->height() ) {
for (int i=0; i<sw; i++)
l2[i] = q2[i*4+chan+endian];
}
// Bi-directional error diffusion
if ( y&1 ) {
for (x=0; x<sw; x++) {
int pix = QMAX(QMIN(5, (l1[x] * 5 + 128)/ 255), 0);
int err = l1[x] - pix * 255 / 5;
pv[chan][x] = pix;
// Spread the error around...
if ( x+1<sw ) {
l1[x+1] += (err*7)>>4;
l2[x+1] += err>>4;
}
l2[x]+=(err*5)>>4;
if (x>1)
l2[x-1]+=(err*3)>>4;
}
} else {
for (x=sw; x-->0; ) {
int pix = QMAX(QMIN(5, (l1[x] * 5 + 128)/ 255), 0);
int err = l1[x] - pix * 255 / 5;
pv[chan][x] = pix;
// Spread the error around...
if ( x > 0 ) {
l1[x-1] += (err*7)>>4;
l2[x-1] += err>>4;
}
l2[x]+=(err*5)>>4;
if (x+1 < sw)
l2[x+1]+=(err*3)>>4;
}
}
}
if (endian) {
for (x=0; x<sw; x++) {
*b++ = INDEXOF(pv[0][x],pv[1][x],pv[2][x]);
}
} else {
for (x=0; x<sw; x++) {
*b++ = INDEXOF(pv[2][x],pv[1][x],pv[0][x]);
}
}
}
}
#ifndef QT_NO_IMAGE_DITHER_TO_1
if ( src->hasAlphaBuffer() ) {
const int trans = 216;
dst->setColor(trans, 0x00000000); // transparent
QImage mask = src->createAlphaMask(conversion_flags);
uchar* m;
for ( y=0; y < src->height(); y++ ) {
uchar bit = 0x80;
m = mask.scanLine(y);
b = dst->scanLine(y);
int w = src->width();
for ( x = 0; x<w; x++ ) {
if ( !(*m&bit) )
b[x] = trans;
if (!(bit >>= 1)) {
bit = 0x80;
while ( x<w-1 && *++m == 0xff ) // skip chunks
x+=8;
}
}
}
}
#endif
if ( ( conversion_flags & Qt::Dither_Mask ) == Qt::DiffuseDither ) {
delete [] line1[0];
delete [] line2[0];
delete [] line1[1];
delete [] line2[1];
delete [] line1[2];
delete [] line2[2];
delete [] pv[0];
delete [] pv[1];
delete [] pv[2];
}
#undef MAX_R
#undef MAX_G
#undef MAX_B
#undef INDEXOF
}
return TRUE;
}
static bool convert_8_to_32( const QImage *src, QImage *dst )
{
if ( !dst->create(src->width(), src->height(), 32) )
return FALSE; // create failed
dst->setAlphaBuffer( src->hasAlphaBuffer() );
for ( int y=0; y<dst->height(); y++ ) { // for each scan line...
Removed explicit usage of the 'register' keyword. Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
5 years ago
uint *p = (uint *)dst->scanLine(y);
Add Qt3 development HEAD version
14 years ago
uchar *b = src->scanLine(y);
uint *end = p + dst->width();
while ( p < end )
*p++ = src->color(*b++);
}
return TRUE;
}
static bool convert_1_to_32( const QImage *src, QImage *dst )
{
if ( !dst->create(src->width(), src->height(), 32) )
return FALSE; // could not create
dst->setAlphaBuffer( src->hasAlphaBuffer() );
for ( int y=0; y<dst->height(); y++ ) { // for each scan line...
Removed explicit usage of the 'register' keyword. Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
5 years ago
uint *p = (uint *)dst->scanLine(y);
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uchar *b = src->scanLine(y);
int x;
if ( src->bitOrder() == QImage::BigEndian ) {
for ( x=0; x<dst->width(); x++ ) {
*p++ = src->color( (*b >> (7 - (x & 7))) & 1 );
if ( (x & 7) == 7 )
b++;
}
} else {
for ( x=0; x<dst->width(); x++ ) {
*p++ = src->color( (*b >> (x & 7)) & 1 );
if ( (x & 7) == 7 )
b++;
}
}
}
return TRUE;
}
#endif // QT_NO_IMAGE_TRUECOLOR
static bool convert_1_to_8( const QImage *src, QImage *dst )
{
if ( !dst->create(src->width(), src->height(), 8, 2) )
return FALSE; // something failed
dst->setAlphaBuffer( src->hasAlphaBuffer() );
if (src->numColors() >= 2) {
dst->setColor( 0, src->color(0) ); // copy color table
dst->setColor( 1, src->color(1) );
} else {
// Unlikely, but they do exist
if (src->numColors() >= 1)
dst->setColor( 0, src->color(0) );
else
dst->setColor( 0, 0xffffffff );
dst->setColor( 1, 0xff000000 );
}
for ( int y=0; y<dst->height(); y++ ) { // for each scan line...
Removed explicit usage of the 'register' keyword. Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
5 years ago
uchar *p = dst->scanLine(y);
Add Qt3 development HEAD version
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uchar *b = src->scanLine(y);
int x;
if ( src->bitOrder() == QImage::BigEndian ) {
for ( x=0; x<dst->width(); x++ ) {
*p++ = (*b >> (7 - (x & 7))) & 1;
if ( (x & 7) == 7 )
b++;
}
} else {
for ( x=0; x<dst->width(); x++ ) {
*p++ = (*b >> (x & 7)) & 1;
if ( (x & 7) == 7 )
b++;
}
}
}
return TRUE;
}
#ifndef QT_NO_IMAGE_DITHER_TO_1
//
// dither_to_1: Uses selected dithering algorithm.
//
static bool dither_to_1( const QImage *src, QImage *dst,
int conversion_flags, bool fromalpha )
{
if ( !dst->create(src->width(), src->height(), 1, 2, QImage::BigEndian) )
return FALSE; // something failed
enum { Threshold, Ordered, Diffuse } dithermode;
if ( fromalpha ) {
if ( ( conversion_flags & Qt::AlphaDither_Mask ) == Qt::DiffuseAlphaDither )
dithermode = Diffuse;
else if ( ( conversion_flags & Qt::AlphaDither_Mask ) == Qt::OrderedAlphaDither )
dithermode = Ordered;
else
dithermode = Threshold;
} else {
if ( ( conversion_flags & Qt::Dither_Mask ) == Qt::ThresholdDither )
dithermode = Threshold;
else if ( ( conversion_flags & Qt::Dither_Mask ) == Qt::OrderedDither )
dithermode = Ordered;
else
dithermode = Diffuse;
}
dst->setColor( 0, qRgb(255, 255, 255) );
dst->setColor( 1, qRgb( 0, 0, 0) );
int w = src->width();
int h = src->height();
int d = src->depth();
uchar gray[256]; // gray map for 8 bit images
bool use_gray = d == 8;
if ( use_gray ) { // make gray map
if ( fromalpha ) {
// Alpha 0x00 -> 0 pixels (white)
// Alpha 0xFF -> 1 pixels (black)
for ( int i=0; i<src->numColors(); i++ )
gray[i] = (255 - (src->color(i) >> 24));
} else {
// Pixel 0x00 -> 1 pixels (black)
// Pixel 0xFF -> 0 pixels (white)
for ( int i=0; i<src->numColors(); i++ )
gray[i] = qGray( src->color(i) & 0x00ffffff );
}
}
switch ( dithermode ) {
case Diffuse: {
int *line1 = new int[w];
int *line2 = new int[w];
int bmwidth = (w+7)/8;
if ( !(line1 && line2) )
return FALSE;
Removed explicit usage of the 'register' keyword. Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
5 years ago
uchar *p;
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uchar *end;
int *b1, *b2;
int wbytes = w * (d/8);
p = src->bits();
end = p + wbytes;
b2 = line2;
if ( use_gray ) { // 8 bit image
while ( p < end )
*b2++ = gray[*p++];
#ifndef QT_NO_IMAGE_TRUECOLOR
} else { // 32 bit image
if ( fromalpha ) {
while ( p < end ) {
*b2++ = 255 - (*(uint*)p >> 24);
p += 4;
}
} else {
while ( p < end ) {
*b2++ = qGray(*(uint*)p);
p += 4;
}
}
#endif
}
int x, y;
for ( y=0; y<h; y++ ) { // for each scan line...
int *tmp = line1; line1 = line2; line2 = tmp;
bool not_last_line = y < h - 1;
if ( not_last_line ) { // calc. grayvals for next line
p = src->scanLine(y+1);
end = p + wbytes;
b2 = line2;
if ( use_gray ) { // 8 bit image
while ( p < end )
*b2++ = gray[*p++];
#ifndef QT_NO_IMAGE_TRUECOLOR
} else { // 24 bit image
if ( fromalpha ) {
while ( p < end ) {
*b2++ = 255 - (*(uint*)p >> 24);
p += 4;
}
} else {
while ( p < end ) {
*b2++ = qGray(*(uint*)p);
p += 4;
}
}
#endif
}
}
int err;
p = dst->scanLine( y );
memset( p, 0, bmwidth );
b1 = line1;
b2 = line2;
int bit = 7;
for ( x=1; x<=w; x++ ) {
if ( *b1 < 128 ) { // black pixel
err = *b1++;
*p |= 1 << bit;
} else { // white pixel
err = *b1++ - 255;
}
if ( bit == 0 ) {
p++;
bit = 7;
} else {
bit--;
}
if ( x < w )
*b1 += (err*7)>>4; // spread error to right pixel
if ( not_last_line ) {
b2[0] += (err*5)>>4; // pixel below
if ( x > 1 )
b2[-1] += (err*3)>>4; // pixel below left
if ( x < w )
b2[1] += err>>4; // pixel below right
}
b2++;
}
}
delete [] line1;
delete [] line2;
} break;
case Ordered: {
static uint bm[16][16];
static int init=0;
if (!init) {
// Build a Bayer Matrix for dithering
init = 1;
int n, i, j;
bm[0][0]=0;
for (n=1; n<16; n*=2) {
for (i=0; i<n; i++) {
for (j=0; j<n; j++) {
bm[i][j]*=4;
bm[i+n][j]=bm[i][j]+2;
bm[i][j+n]=bm[i][j]+3;
bm[i+n][j+n]=bm[i][j]+1;
}
}
}
// Force black to black
bm[0][0]=1;
}
dst->fill( 0 );
uchar** mline = dst->jumpTable();
#ifndef QT_NO_IMAGE_TRUECOLOR
if ( d == 32 ) {
uint** line = (uint**)src->jumpTable();
for ( int i=0; i<h; i++ ) {
uint *p = line[i];
uint *end = p + w;
uchar *m = mline[i];
int bit = 7;
int j = 0;
if ( fromalpha ) {
while ( p < end ) {
if ( (*p++ >> 24) >= bm[j++&15][i&15] )
*m |= 1 << bit;
if ( bit == 0 ) {
m++;
bit = 7;
} else {
bit--;
}
}
} else {
while ( p < end ) {
if ( (uint)qGray(*p++) < bm[j++&15][i&15] )
*m |= 1 << bit;
if ( bit == 0 ) {
m++;
bit = 7;
} else {
bit--;
}
}
}
}
} else
#endif // QT_NO_IMAGE_TRUECOLOR
/* ( d == 8 ) */ {
uchar** line = src->jumpTable();
for ( int i=0; i<h; i++ ) {
uchar *p = line[i];
uchar *end = p + w;
uchar *m = mline[i];
int bit = 7;
int j = 0;
while ( p < end ) {
if ( (uint)gray[*p++] < bm[j++&15][i&15] )
*m |= 1 << bit;
if ( bit == 0 ) {
m++;
bit = 7;
} else {
bit--;
}
}
}
}
} break;
default: { // Threshold:
dst->fill( 0 );
uchar** mline = dst->jumpTable();
#ifndef QT_NO_IMAGE_TRUECOLOR
if ( d == 32 ) {
uint** line = (uint**)src->jumpTable();
for ( int i=0; i<h; i++ ) {
uint *p = line[i];
uint *end = p + w;
uchar *m = mline[i];
int bit = 7;
if ( fromalpha ) {
while ( p < end ) {
if ( (*p++ >> 24) >= 128 )
*m |= 1 << bit; // Set mask "on"
if ( bit == 0 ) {
m++;
bit = 7;
} else {
bit--;
}
}
} else {
while ( p < end ) {
if ( qGray(*p++) < 128 )
*m |= 1 << bit; // Set pixel "black"
if ( bit == 0 ) {
m++;
bit = 7;
} else {
bit--;
}
}
}
}
} else
#endif //QT_NO_IMAGE_TRUECOLOR
if ( d == 8 ) {
uchar** line = src->jumpTable();
for ( int i=0; i<h; i++ ) {
uchar *p = line[i];
uchar *end = p + w;
uchar *m = mline[i];
int bit = 7;
while ( p < end ) {
if ( gray[*p++] < 128 )
*m |= 1 << bit; // Set mask "on"/ pixel "black"
if ( bit == 0 ) {
m++;
bit = 7;
} else {
bit--;
}
}
}
}
}
}
return TRUE;
}
#endif
#ifndef QT_NO_IMAGE_16_BIT
//###### Endianness issues!
static inline bool is16BitGray( ushort c )
{
int r=(c & 0xf800) >> 11;
int g=(c & 0x07e0) >> 6; //green/2
int b=(c & 0x001f);
return r == g && g == b;
}
static bool convert_16_to_32( const QImage *src, QImage *dst )
{
if ( !dst->create(src->width(), src->height(), 32) )
return FALSE; // create failed
dst->setAlphaBuffer( src->hasAlphaBuffer() );
for ( int y=0; y<dst->height(); y++ ) { // for each scan line...
Removed explicit usage of the 'register' keyword. Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
5 years ago
uint *p = (uint *)dst->scanLine(y);
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ushort *s = (ushort*)src->scanLine(y);
uint *end = p + dst->width();
while ( p < end )
*p++ = qt_conv16ToRgb( *s++ );
}
return TRUE;
}
static bool convert_32_to_16( const QImage *src, QImage *dst )
{
if ( !dst->create(src->width(), src->height(), 16) )
return FALSE; // create failed
dst->setAlphaBuffer( src->hasAlphaBuffer() );
for ( int y=0; y<dst->height(); y++ ) { // for each scan line...
Removed explicit usage of the 'register' keyword. Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
5 years ago
ushort *p = (ushort *)dst->scanLine(y);
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uint *s = (uint*)src->scanLine(y);
ushort *end = p + dst->width();
while ( p < end )
*p++ = qt_convRgbTo16( *s++ );
}
return TRUE;
}
#endif
/*!
Converts the depth (bpp) of the image to \a depth and returns the
converted image. The original image is not changed.
The \a depth argument must be 1, 8, 16 (Qt/Embedded only) or 32.
Returns \c *this if \a depth is equal to the image depth, or a
\link isNull() null\endlink image if this image cannot be
converted.
If the image needs to be modified to fit in a lower-resolution
result (e.g. converting from 32-bit to 8-bit), use the \a
conversion_flags to specify how you'd prefer this to happen.
\sa Qt::ImageConversionFlags depth() isNull()
*/
QImage QImage::convertDepth( int depth, int conversion_flags ) const
{
QImage image;
if ( data->d == depth )
image = *this; // no conversion
#ifndef QT_NO_IMAGE_DITHER_TO_1
else if ( (data->d == 8 || data->d == 32) && depth == 1 ) // dither
dither_to_1( this, &image, conversion_flags, FALSE );
#endif
#ifndef QT_NO_IMAGE_TRUECOLOR
else if ( data->d == 32 && depth == 8 ) // 32 -> 8
convert_32_to_8( this, &image, conversion_flags );
else if ( data->d == 8 && depth == 32 ) // 8 -> 32
convert_8_to_32( this, &image );
#endif
else if ( data->d == 1 && depth == 8 ) // 1 -> 8
convert_1_to_8( this, &image );
#ifndef QT_NO_IMAGE_TRUECOLOR
else if ( data->d == 1 && depth == 32 ) // 1 -> 32
convert_1_to_32( this, &image );
#endif
#ifndef QT_NO_IMAGE_16_BIT
else if ( data->d == 16 && depth != 16 ) {
QImage tmp;
convert_16_to_32( this, &tmp );
image = tmp.convertDepth( depth, conversion_flags );
} else if ( data->d != 16 && depth == 16 ) {
QImage tmp = convertDepth( 32, conversion_flags );
convert_32_to_16( &tmp, &image );
}
#endif
else {
#if defined(QT_CHECK_RANGE)
if ( isNull() )
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qWarning( "QImage::convertDepth: Image is a null image" );
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else
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qWarning( "QImage::convertDepth: Depth %d not supported", depth );
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#endif
}
return image;
}
/*!
\overload
*/
QImage QImage::convertDepth( int depth ) const
{
return convertDepth( depth, 0 );
}
/*!
Returns TRUE if ( \a x, \a y ) is a valid coordinate in the image;
otherwise returns FALSE.
\sa width() height() pixelIndex()
*/
bool QImage::valid( int x, int y ) const
{
return x >= 0 && x < width()
&& y >= 0 && y < height();
}
/*!
Returns the pixel index at the given coordinates.
If (\a x, \a y) is not \link valid() valid\endlink, or if the
image is not a paletted image (depth() \> 8), the results are
undefined.
\sa valid() depth()
*/
int QImage::pixelIndex( int x, int y ) const
{
#if defined(QT_CHECK_RANGE)
if ( x < 0 || x >= width() ) {
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qWarning( "QImage::pixel: x=%d out of range", x );
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return -12345;
}
#endif
uchar * s = scanLine( y );
switch( depth() ) {
case 1:
if ( bitOrder() == QImage::LittleEndian )
return (*(s + (x >> 3)) >> (x & 7)) & 1;
else
return (*(s + (x >> 3)) >> (7- (x & 7))) & 1;
case 8:
return (int)s[x];
#ifndef QT_NO_IMAGE_TRUECOLOR
#ifndef QT_NO_IMAGE_16_BIT
case 16:
#endif
case 32:
#if defined(QT_CHECK_RANGE)
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qWarning( "QImage::pixelIndex: Not applicable for %d-bpp images "
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"(no palette)", depth() );
#endif
return 0;
#endif //QT_NO_IMAGE_TRUECOLOR
}
return 0;
}
/*!
Returns the color of the pixel at the coordinates (\a x, \a y).
If (\a x, \a y) is not \link valid() on the image\endlink, the
results are undefined.
\sa setPixel() qRed() qGreen() qBlue() valid()
*/
QRgb QImage::pixel( int x, int y ) const
{
#if defined(QT_CHECK_RANGE)
if ( x < 0 || x >= width() ) {
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qWarning( "QImage::pixel: x=%d out of range", x );
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return 12345;
}
#endif
uchar * s = scanLine( y );
switch( depth() ) {
case 1:
if ( bitOrder() == QImage::LittleEndian )
return color( (*(s + (x >> 3)) >> (x & 7)) & 1 );
else
return color( (*(s + (x >> 3)) >> (7- (x & 7))) & 1 );
case 8:
return color( (int)s[x] );
#ifndef QT_NO_IMAGE_16_BIT
case 16:
return qt_conv16ToRgb(((ushort*)s)[x]);
#endif
#ifndef QT_NO_IMAGE_TRUECOLOR
case 32:
return ((QRgb*)s)[x];
#endif
default:
return 100367;
}
}
/*!
Sets the pixel index or color at the coordinates (\a x, \a y) to
\a index_or_rgb.
If (\a x, \a y) is not \link valid() valid\endlink, the result is
undefined.
If the image is a paletted image (depth() \<= 8) and \a
index_or_rgb \>= numColors(), the result is undefined.
\sa pixelIndex() pixel() qRgb() qRgba() valid()
*/
void QImage::setPixel( int x, int y, uint index_or_rgb )
{
if ( x < 0 || x >= width() ) {
#if defined(QT_CHECK_RANGE)
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qWarning( "QImage::setPixel: x=%d out of range", x );
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#endif
return;
}
if ( depth() == 1 ) {
uchar * s = scanLine( y );
if ( index_or_rgb > 1) {
#if defined(QT_CHECK_RANGE)
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qWarning( "QImage::setPixel: index=%d out of range",
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index_or_rgb );
#endif
} else if ( bitOrder() == QImage::LittleEndian ) {
if (index_or_rgb==0)
*(s + (x >> 3)) &= ~(1 << (x & 7));
else
*(s + (x >> 3)) |= (1 << (x & 7));
} else {
if (index_or_rgb==0)
*(s + (x >> 3)) &= ~(1 << (7-(x & 7)));
else
*(s + (x >> 3)) |= (1 << (7-(x & 7)));
}
} else if ( depth() == 8 ) {
if (index_or_rgb > (uint)numColors()) {
#if defined(QT_CHECK_RANGE)
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qWarning( "QImage::setPixel: index=%d out of range",
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index_or_rgb );
#endif
return;
}
uchar * s = scanLine( y );
s[x] = index_or_rgb;
#ifndef QT_NO_IMAGE_16_BIT
} else if ( depth() == 16 ) {
ushort * s = (ushort*)scanLine( y );
s[x] = qt_convRgbTo16(index_or_rgb);
#endif
#ifndef QT_NO_IMAGE_TRUECOLOR
} else if ( depth() == 32 ) {
QRgb * s = (QRgb*)scanLine( y );
s[x] = index_or_rgb;
#endif
}
}
/*!
Converts the bit order of the image to \a bitOrder and returns the
converted image. The original image is not changed.
Returns \c *this if the \a bitOrder is equal to the image bit
order, or a \link isNull() null\endlink image if this image cannot
be converted.
\sa bitOrder() systemBitOrder() isNull()
*/
QImage QImage::convertBitOrder( Endian bitOrder ) const
{
if ( isNull() || data->d != 1 || // invalid argument(s)
!(bitOrder == BigEndian || bitOrder == LittleEndian) ) {
QImage nullImage;
return nullImage;
}
if ( data->bitordr == bitOrder ) // nothing to do
return copy();
QImage image( data->w, data->h, 1, data->ncols, bitOrder );
int bpl = (width() + 7) / 8;
for ( int y = 0; y < data->h; y++ ) {
Removed explicit usage of the 'register' keyword. Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
5 years ago
uchar *p = jumpTable()[y];
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uchar *end = p + bpl;
uchar *b = image.jumpTable()[y];
while ( p < end )
*b++ = bitflip[*p++];
}
memcpy( image.colorTable(), colorTable(), numColors()*sizeof(QRgb) );
return image;
}
// ### Candidate (renamed) for qcolor.h
static
bool isGray(QRgb c)
{
return qRed(c) == qGreen(c)
&& qRed(c) == qBlue(c);
}
/*!
Returns TRUE if all the colors in the image are shades of gray
(i.e. their red, green and blue components are equal); otherwise
returns FALSE.
This function is slow for large 16-bit (Qt/Embedded only) and 32-bit images.
\sa isGrayscale()
*/
bool QImage::allGray() const
{
#ifndef QT_NO_IMAGE_TRUECOLOR
if (depth()==32) {
int p = width()*height();
QRgb* b = (QRgb*)bits();
while (p--)
if (!isGray(*b++))
return FALSE;
#ifndef QT_NO_IMAGE_16_BIT
} else if (depth()==16) {
int p = width()*height();
ushort* b = (ushort*)bits();
while (p--)
if (!is16BitGray(*b++))
return FALSE;
#endif
} else
#endif //QT_NO_IMAGE_TRUECOLOR
{
if (!data->ctbl) return TRUE;
for (int i=0; i<numColors(); i++)
if (!isGray(data->ctbl[i]))
return FALSE;
}
return TRUE;
}
/*!
For 16-bit (Qt/Embedded only) and 32-bit images, this function is
equivalent to allGray().
For 8-bpp images, this function returns TRUE if color(i) is
QRgb(i,i,i) for all indices of the color table; otherwise returns
FALSE.
\sa allGray() depth()
*/
bool QImage::isGrayscale() const
{
switch (depth()) {
#ifndef QT_NO_IMAGE_TRUECOLOR
case 32:
#ifndef QT_NO_IMAGE_16_BIT
case 16:
#endif
return allGray();
#endif //QT_NO_IMAGE_TRUECOLOR
case 8: {
for (int i=0; i<numColors(); i++)
if (data->ctbl[i] != qRgb(i,i,i))
return FALSE;
return TRUE;
}
}
return FALSE;
}
#ifndef QT_NO_IMAGE_SMOOTHSCALE
static
void pnmscale(const QImage& src, QImage& dst)
{
QRgb* xelrow = 0;
QRgb* tempxelrow = 0;
Removed explicit usage of the 'register' keyword. Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
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QRgb* xP;
QRgb* nxP;
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int rows, cols, rowsread, newrows, newcols;
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5 years ago
int row, col, needtoreadrow;
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const uchar maxval = 255;
double xscale, yscale;
long sxscale, syscale;
Removed explicit usage of the 'register' keyword. Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
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long fracrowtofill, fracrowleft;
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long* as;
long* rs;
long* gs;
long* bs;
int rowswritten = 0;
cols = src.width();
rows = src.height();
newcols = dst.width();
newrows = dst.height();
long SCALE;
long HALFSCALE;
if (cols > 4096)
{
SCALE = 4096;
HALFSCALE = 2048;
}
else
{
int fac = 4096;
while (cols * fac > 4096)
{
fac /= 2;
}
SCALE = fac * cols;
HALFSCALE = fac * cols / 2;
}
xscale = (double) newcols / (double) cols;
yscale = (double) newrows / (double) rows;
sxscale = (long)(xscale * SCALE);
syscale = (long)(yscale * SCALE);
if ( newrows != rows ) /* shortcut Y scaling if possible */
tempxelrow = new QRgb[cols];
if ( src.hasAlphaBuffer() ) {
dst.setAlphaBuffer(TRUE);
as = new long[cols];
for ( col = 0; col < cols; ++col )
as[col] = HALFSCALE;
} else {
as = 0;
}
rs = new long[cols];
gs = new long[cols];
bs = new long[cols];
rowsread = 0;
fracrowleft = syscale;
needtoreadrow = 1;
for ( col = 0; col < cols; ++col )
rs[col] = gs[col] = bs[col] = HALFSCALE;
fracrowtofill = SCALE;
for ( row = 0; row < newrows; ++row ) {
/* First scale Y from xelrow into tempxelrow. */
if ( newrows == rows ) {
/* shortcut Y scaling if possible */
tempxelrow = xelrow = (QRgb*)src.scanLine(rowsread++);
} else {
while ( fracrowleft < fracrowtofill ) {
if ( needtoreadrow && rowsread < rows )
xelrow = (QRgb*)src.scanLine(rowsread++);
for ( col = 0, xP = xelrow; col < cols; ++col, ++xP ) {
if (as) {
as[col] += fracrowleft * qAlpha( *xP );
rs[col] += fracrowleft * qRed( *xP ) * qAlpha( *xP ) / 255;
gs[col] += fracrowleft * qGreen( *xP ) * qAlpha( *xP ) / 255;
bs[col] += fracrowleft * qBlue( *xP ) * qAlpha( *xP ) / 255;
} else {
rs[col] += fracrowleft * qRed( *xP );
gs[col] += fracrowleft * qGreen( *xP );
bs[col] += fracrowleft * qBlue( *xP );
}
}
fracrowtofill -= fracrowleft;
fracrowleft = syscale;
needtoreadrow = 1;
}
/* Now fracrowleft is >= fracrowtofill, so we can produce a row. */
if ( needtoreadrow && rowsread < rows ) {
xelrow = (QRgb*)src.scanLine(rowsread++);
needtoreadrow = 0;
}
Removed explicit usage of the 'register' keyword. Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
5 years ago
long a=0;
Add Qt3 development HEAD version
14 years ago
for ( col = 0, xP = xelrow, nxP = tempxelrow;
col < cols; ++col, ++xP, ++nxP )
{
Removed explicit usage of the 'register' keyword. Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
5 years ago
long r, g, b;
Add Qt3 development HEAD version
14 years ago
if ( as ) {
r = rs[col] + fracrowtofill * qRed( *xP ) * qAlpha( *xP ) / 255;
g = gs[col] + fracrowtofill * qGreen( *xP ) * qAlpha( *xP ) / 255;
b = bs[col] + fracrowtofill * qBlue( *xP ) * qAlpha( *xP ) / 255;
a = as[col] + fracrowtofill * qAlpha( *xP );
if ( a ) {
r = r * 255 / a * SCALE;
g = g * 255 / a * SCALE;
b = b * 255 / a * SCALE;
}
} else {
r = rs[col] + fracrowtofill * qRed( *xP );
g = gs[col] + fracrowtofill * qGreen( *xP );
b = bs[col] + fracrowtofill * qBlue( *xP );
}
r /= SCALE;
if ( r > maxval ) r = maxval;
g /= SCALE;
if ( g > maxval ) g = maxval;
b /= SCALE;
if ( b > maxval ) b = maxval;
if ( as ) {
a /= SCALE;
if ( a > maxval ) a = maxval;
*nxP = qRgba( (int)r, (int)g, (int)b, (int)a );
as[col] = HALFSCALE;
} else {
*nxP = qRgb( (int)r, (int)g, (int)b );
}
rs[col] = gs[col] = bs[col] = HALFSCALE;
}
fracrowleft -= fracrowtofill;
if ( fracrowleft == 0 ) {
fracrowleft = syscale;
needtoreadrow = 1;
}
fracrowtofill = SCALE;
}
/* Now scale X from tempxelrow into dst and write it out. */
if ( newcols == cols ) {
/* shortcut X scaling if possible */
memcpy(dst.scanLine(rowswritten++), tempxelrow, newcols*4);
} else {
Removed explicit usage of the 'register' keyword. Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
5 years ago
long a, r, g, b;
long fraccoltofill, fraccolleft = 0;
int needcol;
Add Qt3 development HEAD version
14 years ago
nxP = (QRgb*)dst.scanLine(rowswritten++);
fraccoltofill = SCALE;
a = r = g = b = HALFSCALE;
needcol = 0;
for ( col = 0, xP = tempxelrow; col < cols; ++col, ++xP ) {
fraccolleft = sxscale;
while ( fraccolleft >= fraccoltofill ) {
if ( needcol ) {
++nxP;
a = r = g = b = HALFSCALE;
}
if ( as ) {
r += fraccoltofill * qRed( *xP ) * qAlpha( *xP ) / 255;
g += fraccoltofill * qGreen( *xP ) * qAlpha( *xP ) / 255;
b += fraccoltofill * qBlue( *xP ) * qAlpha( *xP ) / 255;
a += fraccoltofill * qAlpha( *xP );
if ( a ) {
r = r * 255 / a * SCALE;
g = g * 255 / a * SCALE;
b = b * 255 / a * SCALE;
}
} else {
r += fraccoltofill * qRed( *xP );
g += fraccoltofill * qGreen( *xP );
b += fraccoltofill * qBlue( *xP );
}
r /= SCALE;
if ( r > maxval ) r = maxval;
g /= SCALE;
if ( g > maxval ) g = maxval;
b /= SCALE;
if ( b > maxval ) b = maxval;
if (as) {
a /= SCALE;
if ( a > maxval ) a = maxval;
*nxP = qRgba( (int)r, (int)g, (int)b, (int)a );
} else {
*nxP = qRgb( (int)r, (int)g, (int)b );
}
fraccolleft -= fraccoltofill;
fraccoltofill = SCALE;
needcol = 1;
}
if ( fraccolleft > 0 ) {
if ( needcol ) {
++nxP;
a = r = g = b = HALFSCALE;
needcol = 0;
}
if (as) {
a += fraccolleft * qAlpha( *xP );
r += fraccolleft * qRed( *xP ) * qAlpha( *xP ) / 255;
g += fraccolleft * qGreen( *xP ) * qAlpha( *xP ) / 255;
b += fraccolleft * qBlue( *xP ) * qAlpha( *xP ) / 255;
} else {
r += fraccolleft * qRed( *xP );
g += fraccolleft * qGreen( *xP );
b += fraccolleft * qBlue( *xP );
}
fraccoltofill -= fraccolleft;
}
}
if ( fraccoltofill > 0 ) {
--xP;
if (as) {
a += fraccolleft * qAlpha( *xP );
r += fraccoltofill * qRed( *xP ) * qAlpha( *xP ) / 255;
g += fraccoltofill * qGreen( *xP ) * qAlpha( *xP ) / 255;
b += fraccoltofill * qBlue( *xP ) * qAlpha( *xP ) / 255;
if ( a ) {
r = r * 255 / a * SCALE;
g = g * 255 / a * SCALE;
b = b * 255 / a * SCALE;
}
} else {
r += fraccoltofill * qRed( *xP );
g += fraccoltofill * qGreen( *xP );
b += fraccoltofill * qBlue( *xP );
}
}
if ( ! needcol ) {
r /= SCALE;
if ( r > maxval ) r = maxval;
g /= SCALE;
if ( g > maxval ) g = maxval;
b /= SCALE;
if ( b > maxval ) b = maxval;
if (as) {
a /= SCALE;
if ( a > maxval ) a = maxval;
*nxP = qRgba( (int)r, (int)g, (int)b, (int)a );
} else {
*nxP = qRgb( (int)r, (int)g, (int)b );
}
}
}
}
if ( newrows != rows && tempxelrow )// Robust, tempxelrow might be 0 1 day
delete [] tempxelrow;
if ( as ) // Avoid purify complaint
delete [] as;
if ( rs ) // Robust, rs might be 0 one day
delete [] rs;
if ( gs ) // Robust, gs might be 0 one day
delete [] gs;
if ( bs ) // Robust, bs might be 0 one day
delete [] bs;
}
#endif
/*!
\enum QImage::ScaleMode
The functions scale() and smoothScale() use different modes for
scaling the image. The purpose of these modes is to retain the
ratio of the image if this is required.
\img scaling.png
\value ScaleFree The image is scaled freely: the resulting image
fits exactly into the specified size; the ratio will not
necessarily be preserved.
\value ScaleMin The ratio of the image is preserved and the
resulting image is guaranteed to fit into the specified size
(it is as large as possible within these constraints) - the
image might be smaller than the requested size.
\value ScaleMax The ratio of the image is preserved and the
resulting image fills the whole specified rectangle (it is as
small as possible within these constraints) - the image might
be larger than the requested size.
*/
#ifndef QT_NO_IMAGE_SMOOTHSCALE
/*!
Returns a smoothly scaled copy of the image. The returned image
has a size of width \a w by height \a h pixels if \a mode is \c
ScaleFree. The modes \c ScaleMin and \c ScaleMax may be used to
preserve the ratio of the image: if \a mode is \c ScaleMin, the
returned image is guaranteed to fit into the rectangle specified
by \a w and \a h (it is as large as possible within the
constraints); if \a mode is \c ScaleMax, the returned image fits
at least into the specified rectangle (it is a small as possible
within the constraints).
For 32-bpp images and 1-bpp/8-bpp color images the result will be
32-bpp, whereas \link allGray() all-gray \endlink images
(including black-and-white 1-bpp) will produce 8-bit \link
isGrayscale() grayscale \endlink images with the palette spanning
256 grays from black to white.
This function uses code based on pnmscale.c by Jef Poskanzer.
pnmscale.c - read a portable anymap and scale it
\legalese
Copyright (C) 1989, 1991 by Jef Poskanzer.
Permission to use, copy, modify, and distribute this software and
its documentation for any purpose and without fee is hereby
granted, provided that the above copyright notice appear in all
copies and that both that copyright notice and this permission
notice appear in supporting documentation. This software is
provided "as is" without express or implied warranty.
\sa scale() mirror()
*/
QImage QImage::smoothScale( int w, int h, ScaleMode mode ) const
{
return smoothScale( QSize( w, h ), mode );
}
#endif
#ifndef QT_NO_IMAGE_SMOOTHSCALE
/*!
\overload
The requested size of the image is \a s.
*/
QImage QImage::smoothScale( const QSize& s, ScaleMode mode ) const
{
if ( isNull() ) {
#if defined(QT_CHECK_RANGE)
Undo prior accidental commit
13 years ago
qWarning( "QImage::smoothScale: Image is a null image" );
Add Qt3 development HEAD version
14 years ago
#endif
return copy();
}
QSize newSize = size();
newSize.scale( s, (QSize::ScaleMode)mode ); // ### remove cast in Qt 4.0
if ( newSize == size() )
return copy();
if ( depth() == 32 ) {
QImage img( newSize, 32 );
// 32-bpp to 32-bpp
pnmscale( *this, img );
return img;
} else if ( depth() != 16 && allGray() && !hasAlphaBuffer() ) {
// Inefficient
return convertDepth(32).smoothScale(newSize, mode).convertDepth(8);
} else {
// Inefficient
return convertDepth(32).smoothScale(newSize, mode);
}
}
#endif
/*!
Returns a copy of the image scaled to a rectangle of width \a w
and height \a h according to the ScaleMode \a mode.
\list
\i If \a mode is \c ScaleFree, the image is scaled to (\a w,
\a h).
\i If \a mode is \c ScaleMin, the image is scaled to a rectangle
as large as possible inside (\a w, \a h), preserving the aspect
ratio.
\i If \a mode is \c ScaleMax, the image is scaled to a rectangle
as small as possible outside (\a w, \a h), preserving the aspect
ratio.
\endlist
If either the width \a w or the height \a h is 0 or negative, this
function returns a \link isNull() null\endlink image.
This function uses a simple, fast algorithm. If you need better
quality, use smoothScale() instead.
\sa scaleWidth() scaleHeight() smoothScale() xForm()
*/
#ifndef QT_NO_IMAGE_TRANSFORMATION
QImage QImage::scale( int w, int h, ScaleMode mode ) const
{
return scale( QSize( w, h ), mode );
}
#endif
/*!
\overload
The requested size of the image is \a s.
*/
#ifndef QT_NO_IMAGE_TRANSFORMATION
QImage QImage::scale( const QSize& s, ScaleMode mode ) const
{
if ( isNull() ) {
#if defined(QT_CHECK_RANGE)
Undo prior accidental commit
13 years ago
qWarning( "QImage::scale: Image is a null image" );
Add Qt3 development HEAD version
14 years ago
#endif
return copy();
}
if ( s.isEmpty() )
return QImage();
QSize newSize = size();
newSize.scale( s, (QSize::ScaleMode)mode ); // ### remove cast in Qt 4.0
if ( newSize == size() )
return copy();
QImage img;
QWMatrix wm;
wm.scale( (double)newSize.width() / width(), (double)newSize.height() / height() );
img = xForm( wm );
// ### I should test and resize the image if it has not the right size
// if ( img.width() != newSize.width() || img.height() != newSize.height() )
// img.resize( newSize.width(), newSize.height() );
return img;
}
#endif
/*!
Returns a scaled copy of the image. The returned image has a width
of \a w pixels. This function automatically calculates the height
of the image so that the ratio of the image is preserved.
If \a w is 0 or negative a \link isNull() null\endlink image is
returned.
\sa scale() scaleHeight() smoothScale() xForm()
*/
#ifndef QT_NO_IMAGE_TRANSFORMATION
QImage QImage::scaleWidth( int w ) const
{
if ( isNull() ) {
#if defined(QT_CHECK_RANGE)
Undo prior accidental commit
13 years ago
qWarning( "QImage::scaleWidth: Image is a null image" );
Add Qt3 development HEAD version
14 years ago
#endif
return copy();
}
if ( w <= 0 )
return QImage();
QWMatrix wm;
double factor = (double) w / width();
wm.scale( factor, factor );
return xForm( wm );
}
#endif
/*!
Returns a scaled copy of the image. The returned image has a
height of \a h pixels. This function automatically calculates the
width of the image so that the ratio of the image is preserved.
If \a h is 0 or negative a \link isNull() null\endlink image is
returned.
\sa scale() scaleWidth() smoothScale() xForm()
*/
#ifndef QT_NO_IMAGE_TRANSFORMATION
QImage QImage::scaleHeight( int h ) const
{
if ( isNull() ) {
#if defined(QT_CHECK_RANGE)
Undo prior accidental commit
13 years ago
qWarning( "QImage::scaleHeight: Image is a null image" );
Add Qt3 development HEAD version
14 years ago
#endif
return copy();
}
if ( h <= 0 )
return QImage();
QWMatrix wm;
double factor = (double) h / height();
wm.scale( factor, factor );
return xForm( wm );
}
#endif
/*!
Returns a copy of the image that is transformed using the
transformation matrix, \a matrix.
The transformation \a matrix is internally adjusted to compensate
for unwanted translation, i.e. xForm() returns the smallest image
that contains all the transformed points of the original image.
\sa scale() QPixmap::xForm() QPixmap::trueMatrix() QWMatrix
*/
#ifndef QT_NO_IMAGE_TRANSFORMATION
QImage QImage::xForm( const QWMatrix &matrix ) const
{
// This function uses the same algorithm as (and steals quite some
// code from) QPixmap::xForm().
if ( isNull() )
return copy();
if ( depth() == 16 ) {
// inefficient
return convertDepth( 32 ).xForm( matrix );
}
// source image data
int ws = width();
int hs = height();
int sbpl = bytesPerLine();
uchar *sptr = bits();
// target image data
int wd;
int hd;
int bpp = depth();
// compute size of target image
QWMatrix mat = QPixmap::trueMatrix( matrix, ws, hs );
if ( mat.m12() == 0.0F && mat.m21() == 0.0F ) {
if ( mat.m11() == 1.0F && mat.m22() == 1.0F ) // identity matrix
return copy();
hd = qRound( mat.m22() * hs );
wd = qRound( mat.m11() * ws );
hd = QABS( hd );
wd = QABS( wd );
} else { // rotation or shearing
QPointArray a( QRect(0, 0, ws, hs) );
a = mat.map( a );
QRect r = a.boundingRect().normalize();
wd = r.width();
hd = r.height();
}
bool invertible;
mat = mat.invert( &invertible ); // invert matrix
if ( hd == 0 || wd == 0 || !invertible ) // error, return null image
return QImage();
// create target image (some of the code is from QImage::copy())
QImage dImage( wd, hd, depth(), numColors(), bitOrder() );
// If the image allocation failed, we need to gracefully abort.
if (dImage.isNull())
return dImage;
memcpy( dImage.colorTable(), colorTable(), numColors()*sizeof(QRgb) );
dImage.setAlphaBuffer( hasAlphaBuffer() );
dImage.data->dpmx = dotsPerMeterX();
dImage.data->dpmy = dotsPerMeterY();
switch ( bpp ) {
// initizialize the data
case 1:
memset( dImage.bits(), 0, dImage.numBytes() );
break;
case 8:
if ( dImage.data->ncols < 256 ) {
// colors are left in the color table, so pick that one as transparent
dImage.setNumColors( dImage.data->ncols+1 );
dImage.setColor( dImage.data->ncols-1, 0x00 );
memset( dImage.bits(), dImage.data->ncols-1, dImage.numBytes() );
} else {
memset( dImage.bits(), 0, dImage.numBytes() );
}
break;
case 16:
memset( dImage.bits(), 0xff, dImage.numBytes() );
break;
case 32:
memset( dImage.bits(), 0x00, dImage.numBytes() );
break;
}
int type;
if ( bitOrder() == BigEndian )
type = QT_XFORM_TYPE_MSBFIRST;
else
type = QT_XFORM_TYPE_LSBFIRST;
int dbpl = dImage.bytesPerLine();
qt_xForm_helper( mat, 0, type, bpp, dImage.bits(), dbpl, 0, hd, sptr, sbpl,
ws, hs );
return dImage;
}
#endif
/*!
Builds and returns a 1-bpp mask from the alpha buffer in this
image. Returns a \link isNull() null\endlink image if \link
setAlphaBuffer() alpha buffer mode\endlink is disabled.
See QPixmap::convertFromImage() for a description of the \a
conversion_flags argument.
The returned image has little-endian bit order, which you can
convert to big-endianness using convertBitOrder().
\sa createHeuristicMask() hasAlphaBuffer() setAlphaBuffer()
*/
#ifndef QT_NO_IMAGE_DITHER_TO_1
QImage QImage::createAlphaMask( int conversion_flags ) const
{
if ( conversion_flags == 1 ) {
// Old code is passing "TRUE".
conversion_flags = Qt::DiffuseAlphaDither;
}
if ( isNull() || !hasAlphaBuffer() )
return QImage();
if ( depth() == 1 ) {
// A monochrome pixmap, with alpha channels on those two colors.
// Pretty unlikely, so use less efficient solution.
return convertDepth(8, conversion_flags)
.createAlphaMask( conversion_flags );
}
QImage mask1;
dither_to_1( this, &mask1, conversion_flags, TRUE );
return mask1;
}
#endif
#ifndef QT_NO_IMAGE_HEURISTIC_MASK
/*!
Creates and returns a 1-bpp heuristic mask for this image. It
works by selecting a color from one of the corners, then chipping
away pixels of that color starting at all the edges.
The four corners vote for which color is to be masked away. In
case of a draw (this generally means that this function is not
applicable to the image), the result is arbitrary.
The returned image has little-endian bit order, which you can
convert to big-endianness using convertBitOrder().
If \a clipTight is TRUE the mask is just large enough to cover the
pixels; otherwise, the mask is larger than the data pixels.
This function disregards the \link hasAlphaBuffer() alpha buffer
\endlink.
\sa createAlphaMask()
*/
QImage QImage::createHeuristicMask( bool clipTight ) const
{
if ( isNull() ) {
QImage nullImage;
return nullImage;
}
if ( depth() != 32 ) {
QImage img32 = convertDepth(32);
return img32.createHeuristicMask(clipTight);
}
#define PIX(x,y) (*((QRgb*)scanLine(y)+x) & 0x00ffffff)
int w = width();
int h = height();
QImage m(w, h, 1, 2, QImage::LittleEndian);
m.setColor( 0, 0xffffff );
m.setColor( 1, 0 );
m.fill( 0xff );
QRgb background = PIX(0,0);
if ( background != PIX(w-1,0) &&
background != PIX(0,h-1) &&
background != PIX(w-1,h-1) ) {
background = PIX(w-1,0);
if ( background != PIX(w-1,h-1) &&
background != PIX(0,h-1) &&
PIX(0,h-1) == PIX(w-1,h-1) ) {
background = PIX(w-1,h-1);
}
}
int x,y;
bool done = FALSE;
uchar *ypp, *ypc, *ypn;
while( !done ) {
done = TRUE;
ypn = m.scanLine(0);
ypc = 0;
for ( y = 0; y < h; y++ ) {
ypp = ypc;
ypc = ypn;
ypn = (y == h-1) ? 0 : m.scanLine(y+1);
QRgb *p = (QRgb *)scanLine(y);
for ( x = 0; x < w; x++ ) {
// slowness here - it's possible to do six of these tests
// together in one go. oh well.
if ( ( x == 0 || y == 0 || x == w-1 || y == h-1 ||
!(*(ypc + ((x-1) >> 3)) & (1 << ((x-1) & 7))) ||
!(*(ypc + ((x+1) >> 3)) & (1 << ((x+1) & 7))) ||
!(*(ypp + (x >> 3)) & (1 << (x & 7))) ||
!(*(ypn + (x >> 3)) & (1 << (x & 7))) ) &&
( (*(ypc + (x >> 3)) & (1 << (x & 7))) ) &&
( (*p & 0x00ffffff) == background ) ) {
done = FALSE;
*(ypc + (x >> 3)) &= ~(1 << (x & 7));
}
p++;
}
}
}
if ( !clipTight ) {
ypn = m.scanLine(0);
ypc = 0;
for ( y = 0; y < h; y++ ) {
ypp = ypc;
ypc = ypn;
ypn = (y == h-1) ? 0 : m.scanLine(y+1);
QRgb *p = (QRgb *)scanLine(y);
for ( x = 0; x < w; x++ ) {
if ( (*p & 0x00ffffff) != background ) {
if ( x > 0 )
*(ypc + ((x-1) >> 3)) |= (1 << ((x-1) & 7));
if ( x < w-1 )
*(ypc + ((x+1) >> 3)) |= (1 << ((x+1) & 7));
if ( y > 0 )
*(ypp + (x >> 3)) |= (1 << (x & 7));
if ( y < h-1 )
*(ypn + (x >> 3)) |= (1 << (x & 7));
}
p++;
}
}
}
#undef PIX
return m;
}
#endif //QT_NO_IMAGE_HEURISTIC_MASK
#ifndef QT_NO_IMAGE_MIRROR
/*
This code is contributed by Philipp Lang,
GeneriCom Software Germany (www.generi.com)
under the terms of the QPL, Version 1.0
*/
/*!
\overload
Returns a mirror of the image, mirrored in the horizontal and/or
the vertical direction depending on whether \a horizontal and \a
vertical are set to TRUE or FALSE. The original image is not
changed.
\sa smoothScale()
*/
QImage QImage::mirror(bool horizontal, bool vertical) const
{
int w = width();
int h = height();
if ( (w <= 1 && h <= 1) || (!horizontal && !vertical) )
return copy();
// Create result image, copy colormap
QImage result(w, h, depth(), numColors(), bitOrder());
memcpy(result.colorTable(), colorTable(), numColors()*sizeof(QRgb));
result.setAlphaBuffer(hasAlphaBuffer());
if (depth() == 1)
w = (w+7)/8;
int dxi = horizontal ? -1 : 1;
int dxs = horizontal ? w-1 : 0;
int dyi = vertical ? -1 : 1;
int dy = vertical ? h-1: 0;
// 1 bit, 8 bit
if (depth() == 1 || depth() == 8) {
for (int sy = 0; sy < h; sy++, dy += dyi) {
Q_UINT8* ssl = (Q_UINT8*)(data->bits[sy]);
Q_UINT8* dsl = (Q_UINT8*)(result.data->bits[dy]);
int dx = dxs;
for (int sx = 0; sx < w; sx++, dx += dxi)
dsl[dx] = ssl[sx];
}
}
#ifndef QT_NO_IMAGE_TRUECOLOR
#ifndef QT_NO_IMAGE_16_BIT
// 16 bit
else if (depth() == 16) {
for (int sy = 0; sy < h; sy++, dy += dyi) {
Q_UINT16* ssl = (Q_UINT16*)(data->bits[sy]);
Q_UINT16* dsl = (Q_UINT16*)(result.data->bits[dy]);
int dx = dxs;
for (int sx = 0; sx < w; sx++, dx += dxi)
dsl[dx] = ssl[sx];
}
}
#endif
// 32 bit
else if (depth() == 32) {
for (int sy = 0; sy < h; sy++, dy += dyi) {
Q_UINT32* ssl = (Q_UINT32*)(data->bits[sy]);
Q_UINT32* dsl = (Q_UINT32*)(result.data->bits[dy]);
int dx = dxs;
for (int sx = 0; sx < w; sx++, dx += dxi)
dsl[dx] = ssl[sx];
}
}
#endif
// special handling of 1 bit images for horizontal mirroring
if (horizontal && depth() == 1) {
int shift = width() % 8;
for (int y = h-1; y >= 0; y--) {
Q_UINT8* a0 = (Q_UINT8*)(result.data->bits[y]);
// Swap bytes
Q_UINT8* a = a0+dxs;
while (a >= a0) {
*a = bitflip[*a];
a--;
}
// Shift bits if unaligned
if (shift != 0) {
a = a0+dxs;
Q_UINT8 c = 0;
if (bitOrder() == QImage::LittleEndian) {
while (a >= a0) {
Q_UINT8 nc = *a << shift;
*a = (*a >> (8-shift)) | c;
--a;
c = nc;
}
} else {
while (a >= a0) {
Q_UINT8 nc = *a >> shift;
*a = (*a << (8-shift)) | c;
--a;
c = nc;
}
}
}
}
}
return result;
}
/*!
Returns a QImage which is a vertically mirrored copy of this
image. The original QImage is not changed.
*/
QImage QImage::mirror() const
{
return mirror(FALSE,TRUE);
}
#endif //QT_NO_IMAGE_MIRROR
/*!
Returns a QImage in which the values of the red and blue
components of all pixels have been swapped, effectively converting
an RGB image to a BGR image. The original QImage is not changed.
*/
QImage QImage::swapRGB() const
{
QImage res = copy();
if ( !isNull() ) {
#ifndef QT_NO_IMAGE_TRUECOLOR
if ( depth() == 32 ) {
for ( int i=0; i < height(); i++ ) {
uint *p = (uint*)scanLine( i );
uint *q = (uint*)res.scanLine( i );
uint *end = p + width();
while ( p < end ) {
*q = ((*p << 16) & 0xff0000) | ((*p >> 16) & 0xff) |
(*p & 0xff00ff00);
p++;
q++;
}
}
#ifndef QT_NO_IMAGE_16_BIT
} else if ( depth() == 16 ) {
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qWarning( "QImage::swapRGB not implemented for 16bpp" );
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#endif
} else
#endif //QT_NO_IMAGE_TRUECOLOR
{
uint* p = (uint*)colorTable();
uint* q = (uint*)res.colorTable();
if ( p && q ) {
for ( int i=0; i < numColors(); i++ ) {
*q = ((*p << 16) & 0xff0000) | ((*p >> 16) & 0xff) |
(*p & 0xff00ff00);
p++;
q++;
}
}
}
}
return res;
}
#ifndef QT_NO_IMAGEIO
/*!
Returns a string that specifies the image format of the file \a
fileName, or 0 if the file cannot be read or if the format is not
recognized.
The QImageIO documentation lists the guaranteed supported image
formats, or use QImage::inputFormats() and QImage::outputFormats()
to get lists that include the installed formats.
\sa load() save()
*/
const char* QImage::imageFormat( const QString &fileName )
{
return QImageIO::imageFormat( fileName );
}
/*!
Returns a list of image formats that are supported for image
input.
\sa outputFormats() inputFormatList() QImageIO
*/
QStrList QImage::inputFormats()
{
return QImageIO::inputFormats();
}
#ifndef QT_NO_STRINGLIST
/*!
Returns a list of image formats that are supported for image
input.
Note that if you want to iterate over the list, you should iterate
over a copy, e.g.
\code
QStringList list = myImage.inputFormatList();
QStringList::Iterator it = list.begin();
while( it != list.end() ) {
myProcessing( *it );
++it;
}
\endcode
\sa outputFormatList() inputFormats() QImageIO
*/
QStringList QImage::inputFormatList()
{
return QStringList::fromStrList(QImageIO::inputFormats());
}
/*!
Returns a list of image formats that are supported for image
output.
Note that if you want to iterate over the list, you should iterate
over a copy, e.g.
\code
QStringList list = myImage.outputFormatList();
QStringList::Iterator it = list.begin();
while( it != list.end() ) {
myProcessing( *it );
++it;
}
\endcode
\sa inputFormatList() outputFormats() QImageIO
*/
QStringList QImage::outputFormatList()
{
return QStringList::fromStrList(QImageIO::outputFormats());
}
#endif //QT_NO_STRINGLIST
/*!
Returns a list of image formats that are supported for image
output.
\sa inputFormats() outputFormatList() QImageIO
*/
QStrList QImage::outputFormats()
{
return QImageIO::outputFormats();
}
/*!
Loads an image from the file \a fileName. Returns TRUE if the
image was successfully loaded; otherwise returns FALSE.
If \a format is specified, the loader attempts to read the image
using the specified format. If \a format is not specified (which
is the default), the loader reads a few bytes from the header to
guess the file format.
The QImageIO documentation lists the supported image formats and
explains how to add extra formats.
\sa loadFromData() save() imageFormat() QPixmap::load() QImageIO
*/
bool QImage::load( const QString &fileName, const char* format )
{
QImageIO io( fileName, format );
bool result = io.read();
if ( result )
operator=( io.image() );
return result;
}
/*!
Loads an image from the first \a len bytes of binary data in \a
buf. Returns TRUE if the image was successfully loaded; otherwise
returns FALSE.
If \a format is specified, the loader attempts to read the image
using the specified format. If \a format is not specified (which
is the default), the loader reads a few bytes from the header to
guess the file format.
The QImageIO documentation lists the supported image formats and
explains how to add extra formats.
\sa load() save() imageFormat() QPixmap::loadFromData() QImageIO
*/
bool QImage::loadFromData( const uchar *buf, uint len, const char *format )
{
QByteArray a;
a.setRawData( (char *)buf, len );
QBuffer b( a );
b.open( IO_ReadOnly );
QImageIO io( &b, format );
bool result = io.read();
b.close();
a.resetRawData( (char *)buf, len );
if ( result )
operator=( io.image() );
return result;
}
/*!
\overload
Loads an image from the QByteArray \a buf.
*/
bool QImage::loadFromData( QByteArray buf, const char *format )
{
return loadFromData( (const uchar *)(buf.data()), buf.size(), format );
}
/*!
Saves the image to the file \a fileName, using the image file
format \a format and a quality factor of \a quality. \a quality
must be in the range 0..100 or -1. Specify 0 to obtain small
compressed files, 100 for large uncompressed files, and -1 (the
default) to use the default settings.
Returns TRUE if the image was successfully saved; otherwise
returns FALSE.
\sa load() loadFromData() imageFormat() QPixmap::save() QImageIO
*/
bool QImage::save( const QString &fileName, const char* format, int quality ) const
{
if ( isNull() )
return FALSE; // nothing to save
QImageIO io( fileName, format );
return doImageIO( &io, quality );
}
/*!
\overload
This function writes a QImage to the QIODevice, \a device. This
can be used, for example, to save an image directly into a
QByteArray:
\code
QImage image;
QByteArray ba;
QBuffer buffer( ba );
buffer.open( IO_WriteOnly );
image.save( &buffer, "PNG" ); // writes image into ba in PNG format
\endcode
*/
bool QImage::save( QIODevice* device, const char* format, int quality ) const
{
if ( isNull() )
return FALSE; // nothing to save
QImageIO io( device, format );
return doImageIO( &io, quality );
}
/* \internal
*/
bool QImage::doImageIO( QImageIO* io, int quality ) const
{
if ( !io )
return FALSE;
io->setImage( *this );
#if defined(QT_CHECK_RANGE)
if ( quality > 100 || quality < -1 )
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qWarning( "QPixmap::save: quality out of range [-1,100]" );
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#endif
if ( quality >= 0 )
io->setQuality( QMIN(quality,100) );
return io->write();
}
#endif //QT_NO_IMAGEIO
/*****************************************************************************
QImage stream functions
*****************************************************************************/
#if !defined(QT_NO_DATASTREAM) && !defined(QT_NO_IMAGEIO)
/*!
\relates QImage
Writes the image \a image to the stream \a s as a PNG image, or as a
BMP image if the stream's version is 1.
Note that writing the stream to a file will not produce a valid image file.
\sa QImage::save()
\link datastreamformat.html Format of the QDataStream operators \endlink
*/
QDataStream &operator<<( QDataStream &s, const QImage &image )
{
if ( s.version() >= 5 ) {
if ( image.isNull() ) {
s << (Q_INT32) 0; // null image marker
return s;
} else {
s << (Q_INT32) 1;
// continue ...
}
}
QImageIO io;
io.setIODevice( s.device() );
if ( s.version() == 1 )
io.setFormat( "BMP" );
else
io.setFormat( "PNG" );
io.setImage( image );
io.write();
return s;
}
/*!
\relates QImage
Reads an image from the stream \a s and stores it in \a image.
\sa QImage::load()
\link datastreamformat.html Format of the QDataStream operators \endlink
*/
QDataStream &operator>>( QDataStream &s, QImage &image )
{
if ( s.version() >= 5 ) {
Q_INT32 nullMarker;
s >> nullMarker;
if ( !nullMarker ) {
image = QImage(); // null image
return s;
}
}
QImageIO io( s.device(), 0 );
if ( io.read() )
image = io.image();
return s;
}
#endif
/*****************************************************************************
Standard image io handlers (defined below)
*****************************************************************************/
// standard image io handlers (defined below)
#ifndef QT_NO_IMAGEIO_BMP
static void read_bmp_image( QImageIO * );
static void write_bmp_image( QImageIO * );
#endif
#ifndef QT_NO_IMAGEIO_PPM
static void read_pbm_image( QImageIO * );
static void write_pbm_image( QImageIO * );
#endif
#ifndef QT_NO_IMAGEIO_XBM
static void read_xbm_image( QImageIO * );
static void write_xbm_image( QImageIO * );
#endif
#ifndef QT_NO_IMAGEIO_XPM
static void read_xpm_image( QImageIO * );
static void write_xpm_image( QImageIO * );
#endif
#ifndef QT_NO_ASYNC_IMAGE_IO
static void read_async_image( QImageIO * ); // Not in table of handlers
#endif
/*****************************************************************************
Misc. utility functions
*****************************************************************************/
#if !defined(QT_NO_IMAGEIO_XPM) || !defined(QT_NO_IMAGEIO_XBM)
static QString fbname( const QString &fileName ) // get file basename (sort of)
{
QString s = fileName;
if ( !s.isEmpty() ) {
int i;
if ( (i = s.findRev('/')) >= 0 )
s = s.mid( i );
if ( (i = s.findRev('\\')) >= 0 )
s = s.mid( i );
QRegExp r( QString::fromLatin1("[a-zA-Z][a-zA-Z0-9_]*") );
int p = r.search( s );
if ( p == -1 )
s.truncate( 0 );
else
s = s.mid( p, r.matchedLength() );
}
if ( s.isEmpty() )
s = QString::fromLatin1( "dummy" );
return s;
}
#endif
#ifndef QT_NO_IMAGEIO_BMP
static void swapPixel01( QImage *image ) // 1-bpp: swap 0 and 1 pixels
{
int i;
if ( image->depth() == 1 && image->numColors() == 2 ) {
Removed explicit usage of the 'register' keyword. Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
5 years ago
uint *p = (uint *)image->bits();
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int nbytes = image->numBytes();
for ( i=0; i<nbytes/4; i++ ) {
*p = ~*p;
p++;
}
uchar *p2 = (uchar *)p;
for ( i=0; i<(nbytes&3); i++ ) {
*p2 = ~*p2;
p2++;
}
QRgb t = image->color(0); // swap color 0 and 1
image->setColor( 0, image->color(1) );
image->setColor( 1, t );
}
}
#endif
/*****************************************************************************
QImageIO member functions
*****************************************************************************/
/*!
\class QImageIO qimage.h
\brief The QImageIO class contains parameters for loading and
saving images.
\ingroup images
\ingroup graphics
\ingroup io
QImageIO contains a QIODevice object that is used for image data
I/O. The programmer can install new image file formats in addition
to those that Qt provides.
Qt currently supports the following image file formats: PNG, BMP,
XBM, XPM and PNM. It may also support JPEG, MNG and GIF, if
specially configured during compilation. The different PNM formats
are: PBM (P1 or P4), PGM (P2 or P5), and PPM (P3 or P6).
You don't normally need to use this class; QPixmap::load(),
QPixmap::save(), and QImage contain sufficient functionality.
For image files that contain sequences of images, only the first
is read. See QMovie for loading multiple images.
PBM, PGM, and PPM format \e output is always in the more condensed
raw format. PPM and PGM files with more than 256 levels of
intensity are scaled down when reading.
\warning If you are in a country which recognizes software patents
and in which Unisys holds a patent on LZW compression and/or
decompression and you want to use GIF, Unisys may require you to
license the technology. Such countries include Canada, Japan, the
USA, France, Germany, Italy and the UK.
GIF support may be removed completely in a future version of Qt.
We recommend using the PNG format.
\sa QImage QPixmap QFile QMovie
*/
#ifndef QT_NO_IMAGEIO
struct QImageIOData
{
const char *parameters;
int quality;
float gamma;
};
/*!
Constructs a QImageIO object with all parameters set to zero.
*/
QImageIO::QImageIO()
{
init();
}
/*!
Constructs a QImageIO object with the I/O device \a ioDevice and a
\a format tag.
*/
QImageIO::QImageIO( QIODevice *ioDevice, const char *format )
: frmt(format)
{
init();
iodev = ioDevice;
}
/*!
Constructs a QImageIO object with the file name \a fileName and a
\a format tag.
*/
QImageIO::QImageIO( const QString &fileName, const char* format )
: frmt(format), fname(fileName)
{
init();
}
/*!
Contains initialization common to all QImageIO constructors.
*/
void QImageIO::init()
{
d = new QImageIOData();
d->parameters = 0;
d->quality = -1; // default quality of the current format
d->gamma=0.0f;
iostat = 0;
iodev = 0;
}
/*!
Destroys the object and all related data.
*/
QImageIO::~QImageIO()
{
if ( d->parameters )
delete [] (char*)d->parameters;
delete d;
}
/*****************************************************************************
QImageIO image handler functions
*****************************************************************************/
class QImageHandler
{
public:
QImageHandler( const char *f, const char *h, const QCString& fl,
image_io_handler r, image_io_handler w );
QCString format; // image format
QRegExp header; // image header pattern
enum TMode { Untranslated=0, TranslateIn, TranslateInOut } text_mode;
image_io_handler read_image; // image read function
image_io_handler write_image; // image write function
bool obsolete; // support not "published"
};
QImageHandler::QImageHandler( const char *f, const char *h, const QCString& fl,
image_io_handler r, image_io_handler w )
: format(f), header(QString::fromLatin1(h))
{
text_mode = Untranslated;
if ( fl.contains('t') )
text_mode = TranslateIn;
else if ( fl.contains('T') )
text_mode = TranslateInOut;
obsolete = fl.contains('O');
read_image = r;
write_image = w;
}
typedef QPtrList<QImageHandler> QIHList;// list of image handlers
static QIHList *imageHandlers = 0;
#ifndef QT_NO_COMPONENT
static QPluginManager<QImageFormatInterface> *plugin_manager = 0;
#else
static void *plugin_manager = 0;
#endif
void qt_init_image_plugins()
{
#ifndef QT_NO_COMPONENT
if ( plugin_manager )
return;
plugin_manager = new QPluginManager<QImageFormatInterface>( IID_QImageFormat, QApplication::libraryPaths(), "/imageformats" );
QStringList features = plugin_manager->featureList();
QStringList::Iterator it = features.begin();
while ( it != features.end() ) {
QString str = *it;
++it;
QInterfacePtr<QImageFormatInterface> iface;
plugin_manager->queryInterface( str, &iface );
if ( iface )
iface->installIOHandler( str );
}
#endif
}
static void cleanup()
{
// make sure that image handlers are delete before plugin manager
delete imageHandlers;
imageHandlers = 0;
#ifndef QT_NO_COMPONENT
delete plugin_manager;
plugin_manager = 0;
#endif
}
void qt_init_image_handlers() // initialize image handlers
{
if ( !imageHandlers ) {
imageHandlers = new QIHList;
Q_CHECK_PTR( imageHandlers );
imageHandlers->setAutoDelete( TRUE );
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qAddPostRoutine( cleanup );
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#ifndef QT_NO_IMAGEIO_BMP
QImageIO::defineIOHandler( "BMP", "^BM", 0,
read_bmp_image, write_bmp_image );
#endif
#ifndef QT_NO_IMAGEIO_PPM
QImageIO::defineIOHandler( "PBM", "^P1", "t",
read_pbm_image, write_pbm_image );
QImageIO::defineIOHandler( "PBMRAW", "^P4", "O",
read_pbm_image, write_pbm_image );
QImageIO::defineIOHandler( "PGM", "^P2", "t",
read_pbm_image, write_pbm_image );
QImageIO::defineIOHandler( "PGMRAW", "^P5", "O",
read_pbm_image, write_pbm_image );
QImageIO::defineIOHandler( "PPM", "^P3", "t",
read_pbm_image, write_pbm_image );
QImageIO::defineIOHandler( "PPMRAW", "^P6", "O",
read_pbm_image, write_pbm_image );
#endif
#ifndef QT_NO_IMAGEIO_XBM
QImageIO::defineIOHandler( "XBM", "^((/\\*(?!.XPM.\\*/))|#define)", "T",
read_xbm_image, write_xbm_image );
#endif
#ifndef QT_NO_IMAGEIO_XPM
QImageIO::defineIOHandler( "XPM", "/\\*.XPM.\\*/", "T",
read_xpm_image, write_xpm_image );
#endif
#ifndef QT_NO_IMAGEIO_MNG
qInitMngIO();
#endif
#ifndef QT_NO_IMAGEIO_PNG
qInitPngIO();
#endif
#ifndef QT_NO_IMAGEIO_JPEG
qInitJpegIO();
#endif
}
}
static QImageHandler *get_image_handler( const char *format )
{ // get pointer to handler
qt_init_image_handlers();
qt_init_image_plugins();
Removed explicit usage of the 'register' keyword. Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
5 years ago
QImageHandler *p = imageHandlers->first();
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while ( p ) { // traverse list
if ( p->format == format )
return p;
p = imageHandlers->next();
}
return 0; // no such handler
}
/*!
Defines an image I/O handler for the image format called \a
format, which is recognized using the \link qregexp.html#details
regular expression\endlink \a header, read using \a readImage and
written using \a writeImage.
\a flags is a string of single-character flags for this format.
The only flag defined currently is T (upper case), so the only
legal value for \a flags are "T" and the empty string. The "T"
flag means that the image file is a text file, and Qt should treat
all newline conventions as equivalent. (XPM files and some PPM
files are text files for example.)
\a format is used to select a handler to write a QImage; \a header
is used to select a handler to read an image file.
If \a readImage is a null pointer, the QImageIO will not be able
to read images in \a format. If \a writeImage is a null pointer,
the QImageIO will not be able to write images in \a format. If
both are null, the QImageIO object is valid but useless.
Example:
\code
void readGIF( QImageIO *image )
{
// read the image using the image->ioDevice()
}
void writeGIF( QImageIO *image )
{
// write the image using the image->ioDevice()
}
// add the GIF image handler
QImageIO::defineIOHandler( "GIF",
"^GIF[0-9][0-9][a-z]",
0,
readGIF,
writeGIF );
\endcode
Before the regex test, all the 0 bytes in the file header are
converted to 1 bytes. This is done because when Qt was
ASCII-based, QRegExp could not handle 0 bytes in strings.
The regexp is only applied on the first 14 bytes of the file.
Note that Qt assumes that there is only one handler per format; if
two handlers support the same format, Qt will choose one
arbitrarily. It is not possible to have one handler support
reading, and another support writing.
*/
void QImageIO::defineIOHandler( const char *format,
const char *header,
const char *flags,
image_io_handler readImage,
image_io_handler writeImage )
{
qt_init_image_handlers();
QImageHandler *p;
p = new QImageHandler( format, header, flags,
readImage, writeImage );
Q_CHECK_PTR( p );
imageHandlers->insert( 0, p );
}
/*****************************************************************************
QImageIO normal member functions
*****************************************************************************/
/*!
\fn const QImage &QImageIO::image() const
Returns the image currently set.
\sa setImage()
*/
/*!
\fn int QImageIO::status() const
Returns the image's IO status. A non-zero value indicates an
error, whereas 0 means that the IO operation was successful.
\sa setStatus()
*/
/*!
\fn const char *QImageIO::format() const
Returns the image format string or 0 if no format has been
explicitly set.
*/
/*!
\fn QIODevice *QImageIO::ioDevice() const
Returns the IO device currently set.
\sa setIODevice()
*/
/*!
\fn QString QImageIO::fileName() const
Returns the file name currently set.
\sa setFileName()
*/
/*!
\fn QString QImageIO::description() const
Returns the image description string.
\sa setDescription()
*/
/*!
Sets the image to \a image.
\sa image()
*/
void QImageIO::setImage( const QImage &image )
{
im = image;
}
/*!
Sets the image IO status to \a status. A non-zero value indicates
an error, whereas 0 means that the IO operation was successful.
\sa status()
*/
void QImageIO::setStatus( int status )
{
iostat = status;
}
/*!
Sets the image format to \a format for the image to be read or
written.
It is necessary to specify a format before writing an image, but
it is not necessary to specify a format before reading an image.
If no format has been set, Qt guesses the image format before
reading it. If a format is set the image will only be read if it
has that format.
\sa read() write() format()
*/
void QImageIO::setFormat( const char *format )
{
frmt = format;
}
/*!
Sets the IO device to be used for reading or writing an image.
Setting the IO device allows images to be read/written to any
block-oriented QIODevice.
If \a ioDevice is not null, this IO device will override file name
settings.
\sa setFileName()
*/
void QImageIO::setIODevice( QIODevice *ioDevice )
{
iodev = ioDevice;
}
/*!
Sets the name of the file to read or write an image from to \a
fileName.
\sa setIODevice()
*/
void QImageIO::setFileName( const QString &fileName )
{
fname = fileName;
}
/*!
Returns the quality of the written image, related to the
compression ratio.
\sa setQuality() QImage::save()
*/
int QImageIO::quality() const
{
return d->quality;
}
/*!
Sets the quality of the written image to \a q, related to the
compression ratio.
\a q must be in the range -1..100. Specify 0 to obtain small
compressed files, 100 for large uncompressed files. (-1 signifies
the default compression.)
\sa quality() QImage::save()
*/
void QImageIO::setQuality( int q )
{
d->quality = q;
}
/*!
Returns the image's parameters string.
\sa setParameters()
*/
const char *QImageIO::parameters() const
{
return d->parameters;
}
/*!
Sets the image's parameter string to \a parameters. This is for
image handlers that require special parameters.
Although the current image formats supported by Qt ignore the
parameters string, it may be used in future extensions or by
contributions (for example, JPEG).
\sa parameters()
*/
void QImageIO::setParameters( const char *parameters )
{
if ( d && d->parameters )
delete [] (char*)d->parameters;
Undo prior accidental commit
13 years ago
d->parameters = qstrdup( parameters );
Add Qt3 development HEAD version
14 years ago
}
/*!
Sets the gamma value at which the image will be viewed to \a
gamma. If the image format stores a gamma value for which the
image is intended to be used, then this setting will be used to
modify the image. Setting to 0.0 will disable gamma correction
(i.e. any specification in the file will be ignored).
The default value is 0.0.
\sa gamma()
*/
void QImageIO::setGamma( float gamma )
{
d->gamma=gamma;
}
/*!
Returns the gamma value at which the image will be viewed.
\sa setGamma()
*/
float QImageIO::gamma() const
{
return d->gamma;
}
/*!
Sets the image description string for image handlers that support
image descriptions to \a description.
Currently, no image format supported by Qt uses the description
string.
*/
void QImageIO::setDescription( const QString &description )
{
descr = description;
}
/*!
Returns a string that specifies the image format of the file \a
fileName, or null if the file cannot be read or if the format is
not recognized.
*/
const char* QImageIO::imageFormat( const QString &fileName )
{
QFile file( fileName );
if ( !file.open(IO_ReadOnly) )
return 0;
const char* format = imageFormat( &file );
file.close();
return format;
}
/*!
\overload
Returns a string that specifies the image format of the image read
from IO device \a d, or 0 if the device cannot be read or if the
format is not recognized.
Make sure that \a d is at the right position in the device (for
example, at the beginning of the file).
\sa QIODevice::at()
*/
const char *QImageIO::imageFormat( QIODevice *d )
{
// if you change this change the documentation for defineIOHandler()
const int buflen = 14;
char buf[buflen];
char buf2[buflen];
qt_init_image_handlers();
qt_init_image_plugins();
int pos = d->at(); // save position
int rdlen = d->readBlock( buf, buflen ); // read a few bytes
if ( rdlen != buflen )
return 0;
memcpy( buf2, buf, buflen );
const char* format = 0;
for ( int n = 0; n < rdlen; n++ )
if ( buf[n] == '\0' )
buf[n] = '\001';
if ( d->status() == IO_Ok && rdlen > 0 ) {
buf[rdlen - 1] = '\0';
QString bufStr = QString::fromLatin1(buf);
QImageHandler *p = imageHandlers->first();
int bestMatch = -1;
while ( p ) {
if ( p->read_image && p->header.search(bufStr) != -1 ) {
// try match with header if a read function is available
if (p->header.matchedLength() > bestMatch) {
// keep looking for best match
format = p->format;
bestMatch = p->header.matchedLength();
}
}
p = imageHandlers->next();
}
}
d->at( pos ); // restore position
#ifndef QT_NO_ASYNC_IMAGE_IO
if ( !format )
format = QImageDecoder::formatName( (uchar*)buf2, rdlen );
#endif
return format;
}
/*!
Returns a sorted list of image formats that are supported for
image input.
*/
QStrList QImageIO::inputFormats()
{
QStrList result;
qt_init_image_handlers();
qt_init_image_plugins();
#ifndef QT_NO_ASYNC_IMAGE_IO
// Include asynchronous loaders first.
result = QImageDecoder::inputFormats();
#endif
QImageHandler *p = imageHandlers->first();
while ( p ) {
if ( p->read_image
&& !p->obsolete
&& !result.contains(p->format) )
{
result.inSort(p->format);
}
p = imageHandlers->next();
}
return result;
}
/*!
Returns a sorted list of image formats that are supported for
image output.
*/
QStrList QImageIO::outputFormats()
{
QStrList result;
qt_init_image_handlers();
qt_init_image_plugins();
// Include asynchronous writers (!) first.
// (None)
QImageHandler *p = imageHandlers->first();
while ( p ) {
if ( p->write_image
&& !p->obsolete
&& !result.contains(p->format) )
{
result.inSort(p->format);
}
p = imageHandlers->next();
}
return result;
}
/*!
Reads an image into memory and returns TRUE if the image was
successfully read; otherwise returns FALSE.
Before reading an image you must set an IO device or a file name.
If both an IO device and a file name have been set, the IO device
will be used.
Setting the image file format string is optional.
Note that this function does \e not set the \link format()
format\endlink used to read the image. If you need that
information, use the imageFormat() static functions.
Example:
\code
QImageIO iio;
QPixmap pixmap;
iio.setFileName( "vegeburger.bmp" );
if ( image.read() ) // ok
pixmap = iio.image(); // convert to pixmap
\endcode
\sa setIODevice() setFileName() setFormat() write() QPixmap::load()
*/
bool QImageIO::read()
{
QFile file;
const char *image_format;
QImageHandler *h;
if ( iodev ) { // read from io device
// ok, already open
} else if ( !fname.isEmpty() ) { // read from file
file.setName( fname );
if ( !file.open(IO_ReadOnly) )
return FALSE; // cannot open file
iodev = &file;
} else { // no file name or io device
return FALSE;
}
if (frmt.isEmpty()) {
// Try to guess format
image_format = imageFormat( iodev ); // get image format
if ( !image_format ) {
if ( file.isOpen() ) { // unknown format
file.close();
iodev = 0;
}
return FALSE;
}
} else {
image_format = frmt;
}
h = get_image_handler( image_format );
if ( file.isOpen() ) {
#if !defined(Q_OS_UNIX)
if ( h && h->text_mode ) { // reopen in translated mode
file.close();
file.open( IO_ReadOnly | IO_Translate );
}
else
#endif
file.at( 0 ); // position to start
}
iostat = 1; // assume error
if ( h && h->read_image ) {
(*h->read_image)( this );
}
#ifndef QT_NO_ASYNC_IMAGE_IO
else {
// Format name, but no handler - must be an asychronous reader
read_async_image( this );
}
#endif
if ( file.isOpen() ) { // image was read using file
file.close();
iodev = 0;
}
return iostat == 0; // image successfully read?
}
/*!
Writes an image to an IO device and returns TRUE if the image was
successfully written; otherwise returns FALSE.
Before writing an image you must set an IO device or a file name.
If both an IO device and a file name have been set, the IO device
will be used.
The image will be written using the specified image format.
Example:
\code
QImageIO iio;
QImage im;
im = pixmap; // convert to image
iio.setImage( im );
iio.setFileName( "vegeburger.bmp" );
iio.setFormat( "BMP" );
if ( iio.write() )
// returned TRUE if written successfully
\endcode
\sa setIODevice() setFileName() setFormat() read() QPixmap::save()
*/
bool QImageIO::write()
{
if ( frmt.isEmpty() )
return FALSE;
QImageHandler *h = get_image_handler( frmt );
if ( !h && !plugin_manager) {
qt_init_image_plugins();
h = get_image_handler( frmt );
}
if ( !h || !h->write_image ) {
#if defined(QT_CHECK_RANGE)
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13 years ago
qWarning( "QImageIO::write: No such image format handler: %s",
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format() );
#endif
return FALSE;
}
QFile file;
if ( !iodev && !fname.isEmpty() ) {
file.setName( fname );
bool translate = h->text_mode==QImageHandler::TranslateInOut;
int fmode = translate ? IO_WriteOnly|IO_Translate : IO_WriteOnly;
if ( !file.open(fmode) ) // couldn't create file
return FALSE;
iodev = &file;
}
iostat = 1;
(*h->write_image)( this );
if ( file.isOpen() ) { // image was written using file
file.close();
iodev = 0;
}
return iostat == 0; // image successfully written?
}
#endif //QT_NO_IMAGEIO
#ifndef QT_NO_IMAGEIO_BMP
/*****************************************************************************
BMP (DIB) image read/write functions
*****************************************************************************/
const int BMP_FILEHDR_SIZE = 14; // size of BMP_FILEHDR data
struct BMP_FILEHDR { // BMP file header
char bfType[2]; // "BM"
Q_INT32 bfSize; // size of file
Q_INT16 bfReserved1;
Q_INT16 bfReserved2;
Q_INT32 bfOffBits; // pointer to the pixmap bits
};
QDataStream &operator>>( QDataStream &s, BMP_FILEHDR &bf )
{ // read file header
s.readRawBytes( bf.bfType, 2 );
s >> bf.bfSize >> bf.bfReserved1 >> bf.bfReserved2 >> bf.bfOffBits;
return s;
}
QDataStream &operator<<( QDataStream &s, const BMP_FILEHDR &bf )
{ // write file header
s.writeRawBytes( bf.bfType, 2 );
s << bf.bfSize << bf.bfReserved1 << bf.bfReserved2 << bf.bfOffBits;
return s;
}
const int BMP_OLD = 12; // old Windows/OS2 BMP size
const int BMP_WIN = 40; // new Windows BMP size
const int BMP_OS2 = 64; // new OS/2 BMP size
const int BMP_RGB = 0; // no compression
const int BMP_RLE8 = 1; // run-length encoded, 8 bits
const int BMP_RLE4 = 2; // run-length encoded, 4 bits
const int BMP_BITFIELDS = 3; // RGB values encoded in data as bit-fields
struct BMP_INFOHDR { // BMP information header
Q_INT32 biSize; // size of this struct
Q_INT32 biWidth; // pixmap width
Q_INT32 biHeight; // pixmap height
Q_INT16 biPlanes; // should be 1
Q_INT16 biBitCount; // number of bits per pixel
Q_INT32 biCompression; // compression method
Q_INT32 biSizeImage; // size of image
Q_INT32 biXPelsPerMeter; // horizontal resolution
Q_INT32 biYPelsPerMeter; // vertical resolution
Q_INT32 biClrUsed; // number of colors used
Q_INT32 biClrImportant; // number of important colors
};
QDataStream &operator>>( QDataStream &s, BMP_INFOHDR &bi )
{
s >> bi.biSize;
if ( bi.biSize == BMP_WIN || bi.biSize == BMP_OS2 ) {
s >> bi.biWidth >> bi.biHeight >> bi.biPlanes >> bi.biBitCount;
s >> bi.biCompression >> bi.biSizeImage;
s >> bi.biXPelsPerMeter >> bi.biYPelsPerMeter;
s >> bi.biClrUsed >> bi.biClrImportant;
}
else { // probably old Windows format
Q_INT16 w, h;
s >> w >> h >> bi.biPlanes >> bi.biBitCount;
bi.biWidth = w;
bi.biHeight = h;
bi.biCompression = BMP_RGB; // no compression
bi.biSizeImage = 0;
bi.biXPelsPerMeter = bi.biYPelsPerMeter = 0;
bi.biClrUsed = bi.biClrImportant = 0;
}
return s;
}
QDataStream &operator<<( QDataStream &s, const BMP_INFOHDR &bi )
{
s << bi.biSize;
s << bi.biWidth << bi.biHeight;
s << bi.biPlanes;
s << bi.biBitCount;
s << bi.biCompression;
s << bi.biSizeImage;
s << bi.biXPelsPerMeter << bi.biYPelsPerMeter;
s << bi.biClrUsed << bi.biClrImportant;
return s;
}
static
int calc_shift(int mask)
{
int result = 0;
while (!(mask & 1)) {
result++;
mask >>= 1;
}
return result;
}
static
bool read_dib( QDataStream& s, int offset, int startpos, QImage& image )
{
BMP_INFOHDR bi;
QIODevice* d = s.device();
s >> bi; // read BMP info header
if ( d->atEnd() ) // end of stream/file
return FALSE;
#if 0
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qDebug( "offset...........%d", offset );
qDebug( "startpos.........%d", startpos );
qDebug( "biSize...........%d", bi.biSize );
qDebug( "biWidth..........%d", bi.biWidth );
qDebug( "biHeight.........%d", bi.biHeight );
qDebug( "biPlanes.........%d", bi.biPlanes );
qDebug( "biBitCount.......%d", bi.biBitCount );
qDebug( "biCompression....%d", bi.biCompression );
qDebug( "biSizeImage......%d", bi.biSizeImage );
qDebug( "biXPelsPerMeter..%d", bi.biXPelsPerMeter );
qDebug( "biYPelsPerMeter..%d", bi.biYPelsPerMeter );
qDebug( "biClrUsed........%d", bi.biClrUsed );
qDebug( "biClrImportant...%d", bi.biClrImportant );
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#endif
int w = bi.biWidth, h = bi.biHeight, nbits = bi.biBitCount;
int t = bi.biSize, comp = bi.biCompression;
int red_mask, green_mask, blue_mask;
int red_shift = 0;
int green_shift = 0;
int blue_shift = 0;
int red_scale = 0;
int green_scale = 0;
int blue_scale = 0;
if ( !(nbits == 1 || nbits == 4 || nbits == 8 || nbits == 16 || nbits == 24 || nbits == 32) ||
bi.biPlanes != 1 || comp > BMP_BITFIELDS )
return FALSE; // weird BMP image
if ( !(comp == BMP_RGB || (nbits == 4 && comp == BMP_RLE4) ||
(nbits == 8 && comp == BMP_RLE8) || ((nbits == 16 || nbits == 32) && comp == BMP_BITFIELDS)) )
return FALSE; // weird compression type
bmp image: check for out of range image size. Make the decoder fail early to avoid spending time and memory on attempting to decode a corrupt image file. Based on Qt5 patch for CVE-2018-19873. Signed-off-by: Slávek Banko <slavek.banko@axis.cz>
6 years ago
if ((w < 0) || ((w * abs(h)) > (16384 * 16384)))
return FALSE;
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int ncols;
int depth;
switch ( nbits ) {
case 32:
case 24:
case 16:
depth = 32;
break;
case 8:
case 4:
depth = 8;
break;
default:
depth = 1;
}
if ( depth == 32 ) // there's no colormap
ncols = 0;
else // # colors used
ncols = bi.biClrUsed ? bi.biClrUsed : 1 << nbits;
image.create( w, h, depth, ncols, nbits == 1 ?
QImage::BigEndian : QImage::IgnoreEndian );
if ( image.isNull() ) // could not create image
return FALSE;
image.setDotsPerMeterX( bi.biXPelsPerMeter );
image.setDotsPerMeterY( bi.biYPelsPerMeter );
d->at( startpos + BMP_FILEHDR_SIZE + bi.biSize ); // goto start of colormap
if ( ncols > 0 ) { // read color table
uchar rgb[4];
int rgb_len = t == BMP_OLD ? 3 : 4;
for ( int i=0; i<ncols; i++ ) {
if ( d->readBlock( (char *)rgb, rgb_len ) != rgb_len )
return FALSE;
image.setColor( i, qRgb(rgb[2],rgb[1],rgb[0]) );
if ( d->atEnd() ) // truncated file
return FALSE;
}
} else if (comp == BMP_BITFIELDS && (nbits == 16 || nbits == 32)) {
if ( (Q_ULONG)d->readBlock( (char *)&red_mask, sizeof(red_mask) ) != sizeof(red_mask) )
return FALSE;
if ( (Q_ULONG)d->readBlock( (char *)&green_mask, sizeof(green_mask) ) != sizeof(green_mask) )
return FALSE;
if ( (Q_ULONG)d->readBlock( (char *)&blue_mask, sizeof(blue_mask) ) != sizeof(blue_mask) )
return FALSE;
red_shift = calc_shift(red_mask);
Fix security issue CVE-2015-0295 [taken from RedHat Qt3 patches]
10 years ago
if (((red_mask >> red_shift) + 1) == 0)
return FALSE;
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red_scale = 256 / ((red_mask >> red_shift) + 1);
green_shift = calc_shift(green_mask);
Fix security issue CVE-2015-0295 [taken from RedHat Qt3 patches]
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if (((green_mask >> green_shift) + 1) == 0)
return FALSE;
Add Qt3 development HEAD version
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green_scale = 256 / ((green_mask >> green_shift) + 1);
blue_shift = calc_shift(blue_mask);
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10 years ago
if (((blue_mask >> blue_shift) + 1) == 0)
return FALSE;
Add Qt3 development HEAD version
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blue_scale = 256 / ((blue_mask >> blue_shift) + 1);
} else if (comp == BMP_RGB && (nbits == 24 || nbits == 32)) {
blue_mask = 0x000000ff;
green_mask = 0x0000ff00;
red_mask = 0x00ff0000;
blue_shift = 0;
green_shift = 8;
red_shift = 16;
blue_scale = green_scale = red_scale = 1;
} else if (comp == BMP_RGB && nbits == 16) // don't support RGB values for 15/16 bpp
return FALSE;
// offset can be bogus, be careful
if (offset>=0 && startpos + offset > (Q_LONG)d->at() )
d->at( startpos + offset ); // start of image data
int bpl = image.bytesPerLine();
#ifdef Q_WS_QWS
//
// Guess the number of bytes-per-line if we don't know how much
// image data is in the file (bogus image ?).
//
int bmpbpl = bi.biSizeImage > 0 ?
bi.biSizeImage / bi.biHeight :
(d->size() - offset) / bi.biHeight;
int pad = bmpbpl-bpl;
#endif
uchar **line = image.jumpTable();
if ( nbits == 1 ) { // 1 bit BMP image
while ( --h >= 0 ) {
if ( d->readBlock((char*)line[h],bpl) != bpl )
break;
#ifdef Q_WS_QWS
if ( pad > 0 )
d->at(d->at()+pad);
#endif
}
if ( ncols == 2 && qGray(image.color(0)) < qGray(image.color(1)) )
swapPixel01( &image ); // pixel 0 is white!
}
else if ( nbits == 4 ) { // 4 bit BMP image
int buflen = ((w+7)/8)*4;
uchar *buf = new uchar[buflen];
Q_CHECK_PTR( buf );
if ( comp == BMP_RLE4 ) { // run length compression
int x=0, y=0, b, c, i;
Removed explicit usage of the 'register' keyword. Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
5 years ago
uchar *p = line[h-1];
Add Qt3 development HEAD version
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uchar *endp = line[h-1]+w;
while ( y < h ) {
if ( (b=d->getch()) == EOF )
break;
if ( b == 0 ) { // escape code
switch ( (b=d->getch()) ) {
case 0: // end of line
x = 0;
y++;
p = line[h-y-1];
break;
case 1: // end of image
case EOF: // end of file
y = h; // exit loop
break;
case 2: // delta (jump)
x += d->getch();
y += d->getch();
// Protection
if ( (uint)x >= (uint)w )
x = w-1;
if ( (uint)y >= (uint)h )
y = h-1;
p = line[h-y-1] + x;
break;
default: // absolute mode
// Protection
if ( p + b > endp )
b = endp-p;
i = (c = b)/2;
while ( i-- ) {
b = d->getch();
*p++ = b >> 4;
*p++ = b & 0x0f;
}
if ( c & 1 )
*p++ = d->getch() >> 4;
if ( (((c & 3) + 1) & 2) == 2 )
d->getch(); // align on word boundary
x += c;
}
} else { // encoded mode
// Protection
if ( p + b > endp )
b = endp-p;
i = (c = b)/2;
b = d->getch(); // 2 pixels to be repeated
while ( i-- ) {
*p++ = b >> 4;
*p++ = b & 0x0f;
}
if ( c & 1 )
*p++ = b >> 4;
x += c;
}
}
} else if ( comp == BMP_RGB ) { // no compression
while ( --h >= 0 ) {
if ( d->readBlock((char*)buf,buflen) != buflen )
break;
Removed explicit usage of the 'register' keyword. Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
5 years ago
uchar *p = line[h];
Add Qt3 development HEAD version
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uchar *b = buf;
for ( int i=0; i<w/2; i++ ) { // convert nibbles to bytes
*p++ = *b >> 4;
*p++ = *b++ & 0x0f;
}
if ( w & 1 ) // the last nibble
*p = *b >> 4;
}
}
delete [] buf;
}
else if ( nbits == 8 ) { // 8 bit BMP image
if ( comp == BMP_RLE8 ) { // run length compression
int x=0, y=0, b;
Removed explicit usage of the 'register' keyword. Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
5 years ago
uchar *p = line[h-1];
Add Qt3 development HEAD version
14 years ago
const uchar *endp = line[h-1]+w;
while ( y < h ) {
if ( (b=d->getch()) == EOF )
break;
if ( b == 0 ) { // escape code
switch ( (b=d->getch()) ) {
case 0: // end of line
x = 0;
y++;
p = line[h-y-1];
break;
case 1: // end of image
case EOF: // end of file
y = h; // exit loop
break;
case 2: // delta (jump)
x += d->getch();
y += d->getch();
// Protection
if ( (uint)x >= (uint)w )
x = w-1;
if ( (uint)y >= (uint)h )
y = h-1;
p = line[h-y-1] + x;
break;
default: // absolute mode
// Protection
if ( p + b > endp )
b = endp-p;
if ( d->readBlock( (char *)p, b ) != b )
return FALSE;
if ( (b & 1) == 1 )
d->getch(); // align on word boundary
x += b;
p += b;
}
} else { // encoded mode
// Protection
if ( p + b > endp )
b = endp-p;
memset( p, d->getch(), b ); // repeat pixel
x += b;
p += b;
}
}
} else if ( comp == BMP_RGB ) { // uncompressed
while ( --h >= 0 ) {
if ( d->readBlock((char *)line[h],bpl) != bpl )
break;
#ifdef Q_WS_QWS
if ( pad > 0 )
d->at(d->at()+pad);
#endif
}
}
}
else if ( nbits == 16 || nbits == 24 || nbits == 32 ) { // 16,24,32 bit BMP image
Removed explicit usage of the 'register' keyword. Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
5 years ago
QRgb *p;
Add Qt3 development HEAD version
14 years ago
QRgb *end;
uchar *buf24 = new uchar[bpl];
int bpl24 = ((w*nbits+31)/32)*4;
uchar *b;
int c;
while ( --h >= 0 ) {
p = (QRgb *)line[h];
end = p + w;
if ( d->readBlock( (char *)buf24,bpl24) != bpl24 )
break;
b = buf24;
while ( p < end ) {
c = *(uchar*)b | (*(uchar*)(b+1)<<8);
if (nbits != 16)
c |= *(uchar*)(b+2)<<16;
*p++ = qRgb(((c & red_mask) >> red_shift) * red_scale,
((c & green_mask) >> green_shift) * green_scale,
((c & blue_mask) >> blue_shift) * blue_scale);
b += nbits/8;
}
}
delete[] buf24;
}
return TRUE;
}
bool qt_read_dib( QDataStream& s, QImage& image )
{
return read_dib(s,-1,-BMP_FILEHDR_SIZE,image);
}
static void read_bmp_image( QImageIO *iio )
{
QIODevice *d = iio->ioDevice();
QDataStream s( d );
BMP_FILEHDR bf;
int startpos = d->at();
s.setByteOrder( QDataStream::LittleEndian );// Intel byte order
s >> bf; // read BMP file header
if ( qstrncmp(bf.bfType,"BM",2) != 0 ) // not a BMP image
return;
QImage image;
if (read_dib( s, bf.bfOffBits, startpos, image )) {
iio->setImage( image );
iio->setStatus( 0 ); // image ok
}
}
bool qt_write_dib( QDataStream& s, QImage image )
{
int nbits;
int bpl_bmp;
int bpl = image.bytesPerLine();
QIODevice* d = s.device();
if ( image.depth() == 8 && image.numColors() <= 16 ) {
bpl_bmp = (((bpl+1)/2+3)/4)*4;
nbits = 4;
} else if ( image.depth() == 32 ) {
bpl_bmp = ((image.width()*24+31)/32)*4;
nbits = 24;
#ifdef Q_WS_QWS
} else if ( image.depth() == 1 || image.depth() == 8 ) {
// Qt/E doesn't word align.
bpl_bmp = ((image.width()*image.depth()+31)/32)*4;
nbits = image.depth();
#endif
} else {
bpl_bmp = bpl;
nbits = image.depth();
}
BMP_INFOHDR bi;
bi.biSize = BMP_WIN; // build info header
bi.biWidth = image.width();
bi.biHeight = image.height();
bi.biPlanes = 1;
bi.biBitCount = nbits;
bi.biCompression = BMP_RGB;
bi.biSizeImage = bpl_bmp*image.height();
bi.biXPelsPerMeter = image.dotsPerMeterX() ? image.dotsPerMeterX()
: 2834; // 72 dpi default
bi.biYPelsPerMeter = image.dotsPerMeterY() ? image.dotsPerMeterY() : 2834;
bi.biClrUsed = image.numColors();
bi.biClrImportant = image.numColors();
s << bi; // write info header
if ( image.depth() != 32 ) { // write color table
uchar *color_table = new uchar[4*image.numColors()];
uchar *rgb = color_table;
QRgb *c = image.colorTable();
for ( int i=0; i<image.numColors(); i++ ) {
*rgb++ = qBlue ( c[i] );
*rgb++ = qGreen( c[i] );
*rgb++ = qRed ( c[i] );
*rgb++ = 0;
}
d->writeBlock( (char *)color_table, 4*image.numColors() );
delete [] color_table;
}
if ( image.depth() == 1 && image.bitOrder() != QImage::BigEndian )
image = image.convertBitOrder( QImage::BigEndian );
int y;
if ( nbits == 1 || nbits == 8 ) { // direct output
#ifdef Q_WS_QWS
// Qt/E doesn't word align.
int pad = bpl_bmp - bpl;
char padding[4];
#endif
for ( y=image.height()-1; y>=0; y-- ) {
d->writeBlock( (char*)image.scanLine(y), bpl );
#ifdef Q_WS_QWS
d->writeBlock( padding, pad );
#endif
}
return TRUE;
}
uchar *buf = new uchar[bpl_bmp];
uchar *b, *end;
Removed explicit usage of the 'register' keyword. Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
5 years ago
uchar *p;
Add Qt3 development HEAD version
14 years ago
memset( buf, 0, bpl_bmp );
for ( y=image.height()-1; y>=0; y-- ) { // write the image bits
if ( nbits == 4 ) { // convert 8 -> 4 bits
p = image.scanLine(y);
b = buf;
end = b + image.width()/2;
while ( b < end ) {
*b++ = (*p << 4) | (*(p+1) & 0x0f);
p += 2;
}
if ( image.width() & 1 )
*b = *p << 4;
} else { // 32 bits
QRgb *p = (QRgb *)image.scanLine( y );
QRgb *end = p + image.width();
b = buf;
while ( p < end ) {
*b++ = qBlue(*p);
*b++ = qGreen(*p);
*b++ = qRed(*p);
p++;
}
}
if ( bpl_bmp != d->writeBlock( (char*)buf, bpl_bmp ) ) {
delete[] buf;
return FALSE;
}
}
delete[] buf;
return TRUE;
}
static void write_bmp_image( QImageIO *iio )
{
QIODevice *d = iio->ioDevice();
QImage image = iio->image();
QDataStream s( d );
BMP_FILEHDR bf;
int bpl_bmp;
int bpl = image.bytesPerLine();
// Code partially repeated in qt_write_dib
if ( image.depth() == 8 && image.numColors() <= 16 ) {
bpl_bmp = (((bpl+1)/2+3)/4)*4;
} else if ( image.depth() == 32 ) {
bpl_bmp = ((image.width()*24+31)/32)*4;
} else {
bpl_bmp = bpl;
}
iio->setStatus( 0 );
s.setByteOrder( QDataStream::LittleEndian );// Intel byte order
strncpy( bf.bfType, "BM", 2 ); // build file header
bf.bfReserved1 = bf.bfReserved2 = 0; // reserved, should be zero
bf.bfOffBits = BMP_FILEHDR_SIZE + BMP_WIN + image.numColors()*4;
bf.bfSize = bf.bfOffBits + bpl_bmp*image.height();
s << bf; // write file header
if ( !qt_write_dib( s, image ) )
iio->setStatus( 1 );
}
#endif // QT_NO_IMAGEIO_BMP
#ifndef QT_NO_IMAGEIO_PPM
/*****************************************************************************
PBM/PGM/PPM (ASCII and RAW) image read/write functions
*****************************************************************************/
static int read_pbm_int( QIODevice *d )
{
int c;
int val = -1;
bool digit;
const int buflen = 100;
char buf[buflen];
for ( ;; ) {
if ( (c=d->getch()) == EOF ) // end of file
break;
digit = isdigit( (uchar) c );
if ( val != -1 ) {
if ( digit ) {
val = 10*val + c - '0';
continue;
} else {
if ( c == '#' ) // comment
d->readLine( buf, buflen );
break;
}
}
if ( digit ) // first digit
val = c - '0';
else if ( isspace((uchar) c) )
continue;
else if ( c == '#' )
d->readLine( buf, buflen );
else
break;
}
return val;
}
static void read_pbm_image( QImageIO *iio ) // read PBM image data
{
const int buflen = 300;
char buf[buflen];
QIODevice *d = iio->ioDevice();
int w, h, nbits, mcc, y;
int pbm_bpl;
char type;
bool raw;
QImage image;
if ( d->readBlock( buf, 3 ) != 3 ) // read P[1-6]<white-space>
return;
if ( !(buf[0] == 'P' && isdigit((uchar) buf[1]) && isspace((uchar) buf[2])) )
return;
switch ( (type=buf[1]) ) {
case '1': // ascii PBM
case '4': // raw PBM
nbits = 1;
break;
case '2': // ascii PGM
case '5': // raw PGM
nbits = 8;
break;
case '3': // ascii PPM
case '6': // raw PPM
nbits = 32;
break;
default:
return;
}
raw = type >= '4';
w = read_pbm_int( d ); // get image width
h = read_pbm_int( d ); // get image height
if ( nbits == 1 )
mcc = 1; // ignore max color component
else
mcc = read_pbm_int( d ); // get max color component
Fix crash in tqimage for certain malformed ppm image files The ppm format specifies that the maximum color value field must be less than 65536. The handler did not enforce this, leading to potentional overflow when the value was used in 16 bits context. Based on Qt5 patch for CVE-2018-19872. Signed-off-by: Slávek Banko <slavek.banko@axis.cz>
5 years ago
if ( w <= 0 || w > 32767 || h <= 0 || h > 32767 || mcc <= 0 || mcc > 0xffff )
Add Qt3 development HEAD version
14 years ago
return; // weird P.M image
int maxc = mcc;
if ( maxc > 255 )
maxc = 255;
image.create( w, h, nbits, 0,
nbits == 1 ? QImage::BigEndian : QImage::IgnoreEndian );
if ( image.isNull() )
return;
pbm_bpl = (nbits*w+7)/8; // bytes per scanline in PBM
if ( raw ) { // read raw data
if ( nbits == 32 ) { // type 6
pbm_bpl = 3*w;
uchar *buf24 = new uchar[pbm_bpl], *b;
QRgb *p;
QRgb *end;
for ( y=0; y<h; y++ ) {
if ( d->readBlock( (char *)buf24, pbm_bpl ) != pbm_bpl ) {
delete[] buf24;
return;
}
p = (QRgb *)image.scanLine( y );
end = p + w;
b = buf24;
while ( p < end ) {
*p++ = qRgb(b[0],b[1],b[2]);
b += 3;
}
}
delete[] buf24;
} else { // type 4,5
for ( y=0; y<h; y++ ) {
if ( d->readBlock( (char *)image.scanLine(y), pbm_bpl )
!= pbm_bpl )
return;
}
}
} else { // read ascii data
Removed explicit usage of the 'register' keyword. Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
5 years ago
uchar *p;
Add Qt3 development HEAD version
14 years ago
int n;
for ( y=0; y<h; y++ ) {
p = image.scanLine( y );
n = pbm_bpl;
if ( nbits == 1 ) {
int b;
while ( n-- ) {
b = 0;
for ( int i=0; i<8; i++ )
b = (b << 1) | (read_pbm_int(d) & 1);
*p++ = b;
}
} else if ( nbits == 8 ) {
if ( mcc == maxc ) {
while ( n-- ) {
*p++ = read_pbm_int( d );
}
} else {
while ( n-- ) {
*p++ = read_pbm_int( d ) * maxc / mcc;
}
}
} else { // 32 bits
n /= 4;
int r, g, b;
if ( mcc == maxc ) {
while ( n-- ) {
r = read_pbm_int( d );
g = read_pbm_int( d );
b = read_pbm_int( d );
*((QRgb*)p) = qRgb( r, g, b );
p += 4;
}
} else {
while ( n-- ) {
r = read_pbm_int( d ) * maxc / mcc;
g = read_pbm_int( d ) * maxc / mcc;
b = read_pbm_int( d ) * maxc / mcc;
*((QRgb*)p) = qRgb( r, g, b );
p += 4;
}
}
}
}
}
if ( nbits == 1 ) { // bitmap
image.setNumColors( 2 );
image.setColor( 0, qRgb(255,255,255) ); // white
image.setColor( 1, qRgb(0,0,0) ); // black
} else if ( nbits == 8 ) { // graymap
image.setNumColors( maxc+1 );
for ( int i=0; i<=maxc; i++ )
image.setColor( i, qRgb(i*255/maxc,i*255/maxc,i*255/maxc) );
}
iio->setImage( image );
iio->setStatus( 0 ); // image ok
}
static void write_pbm_image( QImageIO *iio )
{
QIODevice* out = iio->ioDevice();
QCString str;
QImage image = iio->image();
QCString format = iio->format();
format = format.left(3); // ignore RAW part
bool gray = format == "PGM";
if ( format == "PBM" ) {
image = image.convertDepth(1);
} else if ( image.depth() == 1 ) {
image = image.convertDepth(8);
}
if ( image.depth() == 1 && image.numColors() == 2 ) {
if ( qGray(image.color(0)) < qGray(image.color(1)) ) {
// 0=dark/black, 1=light/white - invert
image.detach();
for ( int y=0; y<image.height(); y++ ) {
uchar *p = image.scanLine(y);
uchar *end = p + image.bytesPerLine();
while ( p < end )
*p++ ^= 0xff;
}
}
}
uint w = image.width();
uint h = image.height();
str.sprintf("P\n%d %d\n", w, h);
switch (image.depth()) {
case 1: {
str.insert(1, '4');
if ((uint)out->writeBlock(str, str.length()) != str.length()) {
iio->setStatus(1);
return;
}
w = (w+7)/8;
for (uint y=0; y<h; y++) {
uchar* line = image.scanLine(y);
if ( w != (uint)out->writeBlock((char*)line, w) ) {
iio->setStatus(1);
return;
}
}
}
break;
case 8: {
str.insert(1, gray ? '5' : '6');
str.append("255\n");
if ((uint)out->writeBlock(str, str.length()) != str.length()) {
iio->setStatus(1);
return;
}
QRgb *color = image.colorTable();
uint bpl = w*(gray ? 1 : 3);
uchar *buf = new uchar[bpl];
for (uint y=0; y<h; y++) {
uchar *b = image.scanLine(y);
uchar *p = buf;
uchar *end = buf+bpl;
if ( gray ) {
while ( p < end ) {
uchar g = (uchar)qGray(color[*b++]);
*p++ = g;
}
} else {
while ( p < end ) {
QRgb rgb = color[*b++];
*p++ = qRed(rgb);
*p++ = qGreen(rgb);
*p++ = qBlue(rgb);
}
}
if ( bpl != (uint)out->writeBlock((char*)buf, bpl) ) {
iio->setStatus(1);
return;
}
}
delete [] buf;
}
break;
case 32: {
str.insert(1, gray ? '5' : '6');
str.append("255\n");
if ((uint)out->writeBlock(str, str.length()) != str.length()) {
iio->setStatus(1);
return;
}
uint bpl = w*(gray ? 1 : 3);
uchar *buf = new uchar[bpl];
for (uint y=0; y<h; y++) {
QRgb *b = (QRgb*)image.scanLine(y);
uchar *p = buf;
uchar *end = buf+bpl;
if ( gray ) {
while ( p < end ) {
uchar g = (uchar)qGray(*b++);
*p++ = g;
}
} else {
while ( p < end ) {
QRgb rgb = *b++;
*p++ = qRed(rgb);
*p++ = qGreen(rgb);
*p++ = qBlue(rgb);
}
}
if ( bpl != (uint)out->writeBlock((char*)buf, bpl) ) {
iio->setStatus(1);
return;
}
}
delete [] buf;
}
}
iio->setStatus(0);
}
#endif // QT_NO_IMAGEIO_PPM
#ifndef QT_NO_ASYNC_IMAGE_IO
class QImageIOFrameGrabber : public QImageConsumer {
public:
QImageIOFrameGrabber() : framecount(0) { }
Fix a number of build warnings that could lead to unstable operation This breaks the ABI
12 years ago
virtual ~QImageIOFrameGrabber() { }
Add Qt3 development HEAD version
14 years ago
QImageDecoder *decoder;
int framecount;
void changed(const QRect&) { }
void end() { }
void frameDone(const QPoint&, const QRect&) { framecount++; }
void frameDone() { framecount++; }
void setLooping(int) { }
void setFramePeriod(int) { }
void setSize(int, int) { }
};
static void read_async_image( QImageIO *iio )
{
const int buf_len = 2048;
uchar buffer[buf_len];
QIODevice *d = iio->ioDevice();
QImageIOFrameGrabber* consumer = new QImageIOFrameGrabber();
QImageDecoder *decoder = new QImageDecoder(consumer);
consumer->decoder = decoder;
int startAt = d->at();
int totLen = 0;
for (;;) {
int length = d->readBlock((char*)buffer, buf_len);
if ( length <= 0 ) {
iio->setStatus(length);
break;
}
uchar* b = buffer;
int r = -1;
while (length > 0 && consumer->framecount==0) {
r = decoder->decode(b, length);
if ( r <= 0 ) break;
b += r;
totLen += r;
length -= r;
}
if ( consumer->framecount ) {
// Stopped after first frame
if ( d->isDirectAccess() )
d->at( startAt + totLen );
else {
// ### We have (probably) read too much from the stream into
// the buffer, and there is no way to put it back!
}
iio->setImage(decoder->image());
iio->setStatus(0);
break;
}
if ( r <= 0 ) {
iio->setStatus(r);
break;
}
}
consumer->decoder = 0;
delete decoder;
delete consumer;
}
#endif // QT_NO_ASYNC_IMAGE_IO
#ifndef QT_NO_IMAGEIO_XBM
/*****************************************************************************
X bitmap image read/write functions
*****************************************************************************/
Removed explicit usage of the 'register' keyword. Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
5 years ago
static inline int hex2byte( char *p )
Add Qt3 development HEAD version
14 years ago
{
return ( (isdigit((uchar) *p) ? *p - '0' : toupper((uchar) *p) - 'A' + 10) << 4 ) |
( isdigit((uchar) *(p+1)) ? *(p+1) - '0' : toupper((uchar) *(p+1)) - 'A' + 10 );
}
static void read_xbm_image( QImageIO *iio )
{
const int buflen = 300;
char buf[buflen];
QRegExp r1, r2;
QIODevice *d = iio->ioDevice();
int w=-1, h=-1;
QImage image;
r1 = QString::fromLatin1("^#define[ \t]+[a-zA-Z0-9._]+[ \t]+");
r2 = QString::fromLatin1("[0-9]+");
d->readLine( buf, buflen ); // "#define .._width <num>"
while (!d->atEnd() && buf[0] != '#') //skip leading comment, if any
d->readLine( buf, buflen );
QString sbuf;
sbuf = QString::fromLatin1(buf);
if ( r1.search(sbuf) == 0 &&
r2.search(sbuf, r1.matchedLength()) == r1.matchedLength() )
w = atoi( &buf[r1.matchedLength()] );
d->readLine( buf, buflen ); // "#define .._height <num>"
sbuf = QString::fromLatin1(buf);
if ( r1.search(sbuf) == 0 &&
r2.search(sbuf, r1.matchedLength()) == r1.matchedLength() )
h = atoi( &buf[r1.matchedLength()] );
if ( w <= 0 || w > 32767 || h <= 0 || h > 32767 )
return; // format error
for ( ;; ) { // scan for data
if ( d->readLine(buf, buflen) <= 0 ) // end of file
return;
if ( strstr(buf,"0x") != 0 ) // does line contain data?
break;
}
image.create( w, h, 1, 2, QImage::LittleEndian );
if ( image.isNull() )
return;
image.setColor( 0, qRgb(255,255,255) ); // white
image.setColor( 1, qRgb(0,0,0) ); // black
int x = 0, y = 0;
uchar *b = image.scanLine(0);
char *p = strstr( buf, "0x" );
w = (w+7)/8; // byte width
while ( y < h ) { // for all encoded bytes...
if ( p ) { // p = "0x.."
*b++ = hex2byte(p+2);
p += 2;
if ( ++x == w && ++y < h ) {
b = image.scanLine(y);
x = 0;
}
p = strstr( p, "0x" );
} else { // read another line
if ( d->readLine(buf,buflen) <= 0 ) // EOF ==> truncated image
break;
p = strstr( buf, "0x" );
}
}
iio->setImage( image );
iio->setStatus( 0 ); // image ok
}
static void write_xbm_image( QImageIO *iio )
{
QIODevice *d = iio->ioDevice();
QImage image = iio->image();
int w = image.width();
int h = image.height();
int i;
QString s = fbname(iio->fileName()); // get file base name
char *buf = new char[s.length() + 100];
sprintf( buf, "#define %s_width %d\n", s.ascii(), w );
d->writeBlock( buf, qstrlen(buf) );
sprintf( buf, "#define %s_height %d\n", s.ascii(), h );
d->writeBlock( buf, qstrlen(buf) );
sprintf( buf, "static char %s_bits[] = {\n ", s.ascii() );
d->writeBlock( buf, qstrlen(buf) );
iio->setStatus( 0 );
if ( image.depth() != 1 )
image = image.convertDepth( 1 ); // dither
if ( image.bitOrder() != QImage::LittleEndian )
image = image.convertBitOrder( QImage::LittleEndian );
bool invert = qGray(image.color(0)) < qGray(image.color(1));
char hexrep[16];
for ( i=0; i<10; i++ )
hexrep[i] = '0' + i;
for ( i=10; i<16; i++ )
hexrep[i] = 'a' -10 + i;
if ( invert ) {
char t;
for ( i=0; i<8; i++ ) {
t = hexrep[15-i];
hexrep[15-i] = hexrep[i];
hexrep[i] = t;
}
}
int bcnt = 0;
Removed explicit usage of the 'register' keyword. Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
5 years ago
char *p = buf;
Add Qt3 development HEAD version
14 years ago
int bpl = (w+7)/8;
for (int y = 0; y < h; ++y) {
uchar *b = image.scanLine(y);
for (i = 0; i < bpl; ++i) {
*p++ = '0'; *p++ = 'x';
*p++ = hexrep[*b >> 4];
*p++ = hexrep[*b++ & 0xf];
if ( i < bpl - 1 || y < h - 1 ) {
*p++ = ',';
if ( ++bcnt > 14 ) {
*p++ = '\n';
*p++ = ' ';
*p = '\0';
if ( (int)qstrlen(buf) != d->writeBlock( buf, qstrlen(buf) ) ) {
iio->setStatus( 1 );
delete [] buf;
return;
}
p = buf;
bcnt = 0;
}
}
}
}
strcpy( p, " };\n" );
if ( (int)qstrlen(buf) != d->writeBlock( buf, qstrlen(buf) ) )
iio->setStatus( 1 );
delete [] buf;
}
#endif // QT_NO_IMAGEIO_XBM
#ifndef QT_NO_IMAGEIO_XPM
/*****************************************************************************
XPM image read/write functions
*****************************************************************************/
// Skip until ", read until the next ", return the rest in *buf
// Returns FALSE on error, TRUE on success
static bool read_xpm_string( QCString &buf, QIODevice *d,
const char * const *source, int &index )
{
if ( source ) {
buf = source[index++];
return TRUE;
}
if ( buf.size() < 69 ) //# just an approximation
buf.resize( 123 );
buf[0] = '\0';
int c;
int i;
while ( (c=d->getch()) != EOF && c != '"' ) { }
if ( c == EOF ) {
return FALSE;
}
i = 0;
while ( (c=d->getch()) != EOF && c != '"' ) {
if ( i == (int)buf.size() )
buf.resize( i*2+42 );
buf[i++] = c;
}
if ( c == EOF ) {
return FALSE;
}
if ( i == (int)buf.size() ) // always use a 0 terminator
buf.resize( i+1 );
buf[i] = '\0';
return TRUE;
}
static int nextColorSpec(const QCString & buf)
{
int i = buf.find(" c ");
if (i < 0)
i = buf.find(" g ");
if (i < 0)
i = buf.find(" g4 ");
if (i < 0)
i = buf.find(" m ");
if (i < 0)
i = buf.find(" s ");
return i;
}
//
// INTERNAL
//
// Reads an .xpm from either the QImageIO or from the QString *.
// One of the two HAS to be 0, the other one is used.
//
static void read_xpm_image_or_array( QImageIO * iio, const char * const * source,
QImage & image)
{
QCString buf;
QIODevice *d = 0;
buf.resize( 200 );
int i, cpp, ncols, w, h, index = 0;
if ( iio ) {
iio->setStatus( 1 );
d = iio ? iio->ioDevice() : 0;
d->readLine( buf.data(), buf.size() ); // "/* XPM */"
QRegExp r( QString::fromLatin1("/\\*.XPM.\\*/") );
if ( buf.find(r) == -1 )
return; // bad magic
} else if ( !source ) {
return;
}
if ( !read_xpm_string( buf, d, source, index ) )
return;
if ( sscanf( buf, "%d %d %d %d", &w, &h, &ncols, &cpp ) < 4 )
return; // < 4 numbers parsed
if ( cpp > 15 )
return;
if ( ncols > 256 ) {
image.create( w, h, 32 );
} else {
image.create( w, h, 8, ncols );
}
if (image.isNull())
return;
QMap<QString, int> colorMap;
int currentColor;
for( currentColor=0; currentColor < ncols; ++currentColor ) {
if ( !read_xpm_string( buf, d, source, index ) ) {
#if defined(QT_CHECK_RANGE)
Undo prior accidental commit
13 years ago
qWarning( "QImage: XPM color specification missing");
Add Qt3 development HEAD version
14 years ago
#endif
return;
}
QString index;
index = buf.left( cpp );
buf = buf.mid( cpp ).simplifyWhiteSpace().lower();
buf.prepend( " " );
i = nextColorSpec(buf);
if ( i < 0 ) {
#if defined(QT_CHECK_RANGE)
Undo prior accidental commit
13 years ago
qWarning( "QImage: XPM color specification is missing: %s", buf.data());
Add Qt3 development HEAD version
14 years ago
#endif
return; // no c/g/g4/m/s specification at all
}
buf = buf.mid( i+3 );
// Strip any other colorspec
int end = nextColorSpec(buf);
if (end != -1)
buf.truncate(end);
buf = buf.stripWhiteSpace();
if ( buf == "none" ) {
image.setAlphaBuffer( TRUE );
int transparentColor = currentColor;
if ( image.depth() == 8 ) {
image.setColor( transparentColor,
RGB_MASK & qRgb(198,198,198) );
colorMap.insert( index, transparentColor );
} else {
QRgb rgb = RGB_MASK & qRgb(198,198,198);
colorMap.insert( index, rgb );
}
} else {
if ( ((buf.length()-1) % 3) && (buf[0] == '#') ) {
buf.truncate (((buf.length()-1) / 4 * 3) + 1); // remove alpha channel left by imagemagick
}
QColor c( buf.data() );
if ( image.depth() == 8 ) {
image.setColor( currentColor, 0xff000000 | c.rgb() );
colorMap.insert( index, currentColor );
} else {
QRgb rgb = 0xff000000 | c.rgb();
colorMap.insert( index, rgb );
}
}
}
// Read pixels
for( int y=0; y<h; y++ ) {
if ( !read_xpm_string( buf, d, source, index ) ) {
#if defined(QT_CHECK_RANGE)
Undo prior accidental commit
13 years ago
qWarning( "QImage: XPM pixels missing on image line %d", y);
Add Qt3 development HEAD version
14 years ago
#endif
return;
}
if ( image.depth() == 8 ) {
uchar *p = image.scanLine(y);
uchar *d = (uchar *)buf.data();
uchar *end = d + buf.length();
int x;
if ( cpp == 1 ) {
char b[2];
b[1] = '\0';
for ( x=0; x<w && d<end; x++ ) {
b[0] = *d++;
*p++ = (uchar)colorMap[b];
}
} else {
char b[16];
b[cpp] = '\0';
for ( x=0; x<w && d<end; x++ ) {
strncpy( b, (char *)d, cpp );
*p++ = (uchar)colorMap[b];
d += cpp;
}
}
} else {
QRgb *p = (QRgb*)image.scanLine(y);
uchar *d = (uchar *)buf.data();
uchar *end = d + buf.length();
int x;
char b[16];
b[cpp] = '\0';
for ( x=0; x<w && d<end; x++ ) {
strncpy( b, (char *)d, cpp );
*p++ = (QRgb)colorMap[b];
d += cpp;
}
}
}
if ( iio ) {
iio->setImage( image );
iio->setStatus( 0 ); // image ok
}
}
static void read_xpm_image( QImageIO * iio )
{
QImage i;
(void)read_xpm_image_or_array( iio, 0, i );
return;
}
static const char* xpm_color_name( int cpp, int index )
{
static char returnable[5];
static const char code[] = ".#abcdefghijklmnopqrstuvwxyzABCD"
"EFGHIJKLMNOPQRSTUVWXYZ0123456789";
// cpp is limited to 4 and index is limited to 64^cpp
if ( cpp > 1 ) {
if ( cpp > 2 ) {
if ( cpp > 3 ) {
returnable[3] = code[index % 64];
index /= 64;
} else
returnable[3] = '\0';
returnable[2] = code[index % 64];
index /= 64;
} else
returnable[2] = '\0';
// the following 4 lines are a joke!
if ( index == 0 )
index = 64*44+21;
else if ( index == 64*44+21 )
index = 0;
returnable[1] = code[index % 64];
index /= 64;
} else
returnable[1] = '\0';
returnable[0] = code[index];
return returnable;
}
// write XPM image data
static void write_xpm_image( QImageIO * iio )
{
if ( iio )
iio->setStatus( 1 );
else
return;
// ### 8-bit case could be made faster
QImage image;
if ( iio->image().depth() != 32 )
image = iio->image().convertDepth( 32 );
else
image = iio->image();
QMap<QRgb, int> colorMap;
int w = image.width(), h = image.height(), ncolors = 0;
int x, y;
// build color table
for( y=0; y<h; y++ ) {
QRgb * yp = (QRgb *)image.scanLine( y );
for( x=0; x<w; x++ ) {
QRgb color = *(yp + x);
if ( !colorMap.contains(color) )
colorMap.insert( color, ncolors++ );
}
}
// number of 64-bit characters per pixel needed to encode all colors
int cpp = 1;
for ( int k = 64; ncolors > k; k *= 64 ) {
++cpp;
// limit to 4 characters per pixel
// 64^4 colors is enough for a 4096x4096 image
if ( cpp > 4)
break;
}
QString line;
// write header
QTextStream s( iio->ioDevice() );
s << "/* XPM */" << endl
<< "static char *" << fbname(iio->fileName()) << "[]={" << endl
<< "\"" << w << " " << h << " " << ncolors << " " << cpp << "\"";
// write palette
QMap<QRgb, int>::Iterator c = colorMap.begin();
while ( c != colorMap.end() ) {
QRgb color = c.key();
if ( image.hasAlphaBuffer() && color == (color & RGB_MASK) )
line.sprintf( "\"%s c None\"",
xpm_color_name(cpp, *c) );
else
line.sprintf( "\"%s c #%02x%02x%02x\"",
xpm_color_name(cpp, *c),
qRed(color),
qGreen(color),
qBlue(color) );
++c;
s << "," << endl << line;
}
// write pixels, limit to 4 characters per pixel
line.truncate( cpp*w );
for( y=0; y<h; y++ ) {
QRgb * yp = (QRgb *) image.scanLine( y );
int cc = 0;
for( x=0; x<w; x++ ) {
int color = (int)(*(yp + x));
QCString chars = xpm_color_name( cpp, colorMap[color] );
line[cc++] = chars[0];
if ( cpp > 1 ) {
line[cc++] = chars[1];
if ( cpp > 2 ) {
line[cc++] = chars[2];
if ( cpp > 3 ) {
line[cc++] = chars[3];
}
}
}
}
s << "," << endl << "\"" << line << "\"";
}
s << "};" << endl;
iio->setStatus( 0 );
}
#endif // QT_NO_IMAGEIO_XPM
/*!
Returns an image with depth \a d, using the \a palette_count
colors pointed to by \a palette. If \a d is 1 or 8, the returned
image will have its color table ordered the same as \a palette.
If the image needs to be modified to fit in a lower-resolution
result (e.g. converting from 32-bit to 8-bit), use the \a
conversion_flags to specify how you'd prefer this to happen.
Note: currently no closest-color search is made. If colors are
found that are not in the palette, the palette may not be used at
all. This result should not be considered valid because it may
change in future implementations.
Currently inefficient for non-32-bit images.
\sa Qt::ImageConversionFlags
*/
#ifndef QT_NO_IMAGE_TRUECOLOR
QImage QImage::convertDepthWithPalette( int d, QRgb* palette, int palette_count, int conversion_flags ) const
{
if ( depth() == 1 ) {
return convertDepth( 8, conversion_flags )
.convertDepthWithPalette( d, palette, palette_count, conversion_flags );
} else if ( depth() == 8 ) {
// ### this could be easily made more efficient
return convertDepth( 32, conversion_flags )
.convertDepthWithPalette( d, palette, palette_count, conversion_flags );
} else {
QImage result;
convert_32_to_8( this, &result,
(conversion_flags&~Qt::DitherMode_Mask) | Qt::AvoidDither,
palette, palette_count );
return result.convertDepth( d );
}
}
#endif
static
bool
haveSamePalette(const QImage& a, const QImage& b)
{
if (a.depth() != b.depth()) return FALSE;
if (a.numColors() != b.numColors()) return FALSE;
QRgb* ca = a.colorTable();
QRgb* cb = b.colorTable();
for (int i=a.numColors(); i--; ) {
if (*ca++ != *cb++) return FALSE;
}
return TRUE;
}
/*!
\relates QImage
Copies a block of pixels from \a src to \a dst. The pixels
copied from source (src) are converted according to
\a conversion_flags if it is incompatible with the destination
(\a dst).
\a sx, \a sy is the top-left pixel in \a src, \a dx, \a dy
is the top-left position in \a dst and \a sw, \a sh is the
size of the copied block.
The copying is clipped if areas outside \a src or \a dst are
specified.
If \a sw is -1, it is adjusted to src->width(). Similarly, if \a
sh is -1, it is adjusted to src->height().
Currently inefficient for non 32-bit images.
*/
void bitBlt( QImage* dst, int dx, int dy, const QImage* src,
int sx, int sy, int sw, int sh, int conversion_flags )
{
// Parameter correction
if ( sw < 0 ) sw = src->width();
if ( sh < 0 ) sh = src->height();
if ( sx < 0 ) { dx -= sx; sw += sx; sx = 0; }
if ( sy < 0 ) { dy -= sy; sh += sy; sy = 0; }
if ( dx < 0 ) { sx -= dx; sw += dx; dx = 0; }
if ( dy < 0 ) { sy -= dy; sh += dy; dy = 0; }
if ( sx + sw > src->width() ) sw = src->width() - sx;
if ( sy + sh > src->height() ) sh = src->height() - sy;
if ( dx + sw > dst->width() ) sw = dst->width() - dx;
if ( dy + sh > dst->height() ) sh = dst->height() - dy;
if ( sw <= 0 || sh <= 0 ) return; // Nothing left to copy
if ( (dst->data == src->data) && dx==sx && dy==sy ) return; // Same pixels
// "Easy" to copy if both same depth and one of:
// - 32 bit
// - 8 bit, identical palette
// - 1 bit, identical palette and byte-aligned area
//
if ( haveSamePalette(*dst,*src)
Fix a few more build warnings
13 years ago
&& ( (dst->depth() != 1) ||
(!( (dx&7) || (sx&7) ||
(((sw&7) && (sx+sw < src->width())) ||
(dx+sw < dst->width()) ) )) ) )
Add Qt3 development HEAD version
14 years ago
{
// easy to copy
} else if ( dst->depth() != 32 ) {
#ifndef QT_NO_IMAGE_TRUECOLOR
QImage dstconv = dst->convertDepth( 32 );
bitBlt( &dstconv, dx, dy, src, sx, sy, sw, sh,
(conversion_flags&~Qt::DitherMode_Mask) | Qt::AvoidDither );
*dst = dstconv.convertDepthWithPalette( dst->depth(),
dst->colorTable(), dst->numColors() );
#endif
return;
}
// Now assume palette can be ignored
if ( dst->depth() != src->depth() ) {
Fix a few more build warnings
13 years ago
if ( ((sw == src->width()) && (sh == src->height())) || (dst->depth()==32) ) {
Add Qt3 development HEAD version
14 years ago
QImage srcconv = src->convertDepth( dst->depth(), conversion_flags );
bitBlt( dst, dx, dy, &srcconv, sx, sy, sw, sh, conversion_flags );
} else {
QImage srcconv = src->copy( sx, sy, sw, sh ); // ie. bitBlt
bitBlt( dst, dx, dy, &srcconv, 0, 0, sw, sh, conversion_flags );
}
return;
}
// Now assume both are the same depth.
// Now assume both are 32-bit or 8-bit with compatible palettes.
// "Easy"
switch ( dst->depth() ) {
case 1:
{
uchar* d = dst->scanLine(dy) + dx/8;
uchar* s = src->scanLine(sy) + sx/8;
const int bw = (sw+7)/8;
if ( bw < 64 ) {
// Trust ourselves
const int dd = dst->bytesPerLine() - bw;
const int ds = src->bytesPerLine() - bw;
while ( sh-- ) {
for ( int t=bw; t--; )
*d++ = *s++;
d += dd;
s += ds;
}
} else {
// Trust libc
const int dd = dst->bytesPerLine();
const int ds = src->bytesPerLine();
while ( sh-- ) {
memcpy( d, s, bw );
d += dd;
s += ds;
}
}
}
break;
case 8:
{
uchar* d = dst->scanLine(dy) + dx;
uchar* s = src->scanLine(sy) + sx;
if ( sw < 64 ) {
// Trust ourselves
const int dd = dst->bytesPerLine() - sw;
const int ds = src->bytesPerLine() - sw;
while ( sh-- ) {
for ( int t=sw; t--; )
*d++ = *s++;
d += dd;
s += ds;
}
} else {
// Trust libc
const int dd = dst->bytesPerLine();
const int ds = src->bytesPerLine();
while ( sh-- ) {
memcpy( d, s, sw );
d += dd;
s += ds;
}
}
}
break;
#ifndef QT_NO_IMAGE_TRUECOLOR
case 32:
if ( src->hasAlphaBuffer() ) {
QRgb* d = (QRgb*)dst->scanLine(dy) + dx;
QRgb* s = (QRgb*)src->scanLine(sy) + sx;
const int dd = dst->width() - sw;
const int ds = src->width() - sw;
while ( sh-- ) {
for ( int t=sw; t--; ) {
unsigned char a = qAlpha(*s);
if ( a == 255 )
*d++ = *s++;
else if ( a == 0 )
++d,++s; // nothing
else {
unsigned char r = ((qRed(*s)-qRed(*d)) * a) / 256 + qRed(*d);
unsigned char g = ((qGreen(*s)-qGreen(*d)) * a) / 256 + qGreen(*d);
unsigned char b = ((qBlue(*s)-qBlue(*d)) * a) / 256 + qBlue(*d);
a = QMAX(qAlpha(*d),a); // alternatives...
*d++ = qRgba(r,g,b,a);
++s;
}
}
d += dd;
s += ds;
}
} else {
QRgb* d = (QRgb*)dst->scanLine(dy) + dx;
QRgb* s = (QRgb*)src->scanLine(sy) + sx;
if ( sw < 64 ) {
// Trust ourselves
const int dd = dst->width() - sw;
const int ds = src->width() - sw;
while ( sh-- ) {
for ( int t=sw; t--; )
*d++ = *s++;
d += dd;
s += ds;
}
} else {
// Trust libc
const int dd = dst->width();
const int ds = src->width();
const int b = sw*sizeof(QRgb);
while ( sh-- ) {
memcpy( d, s, b );
d += dd;
s += ds;
}
}
}
break;
#endif // QT_NO_IMAGE_TRUECOLOR
}
}
/*!
Returns TRUE if this image and image \a i have the same contents;
otherwise returns FALSE. The comparison can be slow, unless there
is some obvious difference, such as different widths, in which
case the function will return quickly.
\sa operator=()
*/
bool QImage::operator==( const QImage & i ) const
{
// same object, or shared?
if ( i.data == data )
return TRUE;
// obviously different stuff?
if ( i.data->h != data->h ||
i.data->w != data->w )
return FALSE;
// not equal if one has alphabuffer and the other does not
if ( i.hasAlphaBuffer() != hasAlphaBuffer() )
return FALSE;
// that was the fast bit...
QImage i1 = convertDepth( 32 );
QImage i2 = i.convertDepth( 32 );
int l;
// if no alpha buffer used, there might still be junk in the
// alpha bits; thus, we can't do memcmp-style comparison of scanlines
if ( !hasAlphaBuffer() ) {
int m;
QRgb *i1line;
QRgb *i2line;
for( l=0; l < data->h; l++ ) {
i1line = (uint *)i1.scanLine( l );
i2line = (uint *)i2.scanLine( l );
// compare pixels of scanline individually
for ( m=0; m < data->w; m++ )
if ( (i1line[m] ^ i2line[m]) & 0x00FFFFFF )
return FALSE;
}
} else {
// yay, we can do fast binary comparison on entire scanlines
for( l=0; l < data->h; l++ )
if ( memcmp( i1.scanLine( l ), i2.scanLine( l ), 4*data->w ) )
return FALSE;
}
return TRUE;
}
/*!
Returns TRUE if this image and image \a i have different contents;
otherwise returns FALSE. The comparison can be slow, unless there
is some obvious difference, such as different widths, in which
case the function will return quickly.
\sa operator=()
*/
bool QImage::operator!=( const QImage & i ) const
{
return !(*this == i);
}
/*!
\fn int QImage::dotsPerMeterX() const
Returns the number of pixels that fit horizontally in a physical
meter. This and dotsPerMeterY() define the intended scale and
aspect ratio of the image.
\sa setDotsPerMeterX()
*/
/*!
\fn int QImage::dotsPerMeterY() const
Returns the number of pixels that fit vertically in a physical
meter. This and dotsPerMeterX() define the intended scale and
aspect ratio of the image.
\sa setDotsPerMeterY()
*/
/*!
Sets the value returned by dotsPerMeterX() to \a x.
*/
void QImage::setDotsPerMeterX(int x)
{
data->dpmx = x;
}
/*!
Sets the value returned by dotsPerMeterY() to \a y.
*/
void QImage::setDotsPerMeterY(int y)
{
data->dpmy = y;
}
/*!
\fn QPoint QImage::offset() const
Returns the number of pixels by which the image is intended to be
offset by when positioning relative to other images.
*/
/*!
Sets the value returned by offset() to \a p.
*/
void QImage::setOffset(const QPoint& p)
{
data->offset = p;
}
#ifndef QT_NO_IMAGE_TEXT
/*!
\internal
Returns the internal QImageDataMisc object. This object will be
created if it doesn't already exist.
*/
QImageDataMisc& QImage::misc() const
{
if ( !data->misc )
data->misc = new QImageDataMisc;
return *data->misc;
}
/*!
Returns the string recorded for the keyword \a key in language \a
lang, or in a default language if \a lang is 0.
*/
QString QImage::text(const char* key, const char* lang) const
{
QImageTextKeyLang x(key,lang);
return misc().text_lang[x];
}
/*!
\overload
Returns the string recorded for the keyword and language \a kl.
*/
QString QImage::text(const QImageTextKeyLang& kl) const
{
return misc().text_lang[kl];
}
/*!
Returns the language identifiers for which some texts are
recorded.
Note that if you want to iterate over the list, you should iterate
over a copy, e.g.
\code
QStringList list = myImage.textLanguages();
QStringList::Iterator it = list.begin();
while( it != list.end() ) {
myProcessing( *it );
++it;
}
\endcode
\sa textList() text() setText() textKeys()
*/
QStringList QImage::textLanguages() const
{
if ( !data->misc )
return QStringList();
return misc().languages();
}
/*!
Returns the keywords for which some texts are recorded.
Note that if you want to iterate over the list, you should iterate
over a copy, e.g.
\code
QStringList list = myImage.textKeys();
QStringList::Iterator it = list.begin();
while( it != list.end() ) {
myProcessing( *it );
++it;
}
\endcode
\sa textList() text() setText() textLanguages()
*/
QStringList QImage::textKeys() const
{
if ( !data->misc )
return QStringList();
return misc().keys();
}
/*!
Returns a list of QImageTextKeyLang objects that enumerate all the
texts key/language pairs set by setText() for this image.
Note that if you want to iterate over the list, you should iterate
over a copy, e.g.
\code
QValueList<QImageTextKeyLang> list = myImage.textList();
QValueList<QImageTextKeyLang>::Iterator it = list.begin();
while( it != list.end() ) {
myProcessing( *it );
++it;
}
\endcode
*/
QValueList<QImageTextKeyLang> QImage::textList() const
{
if ( !data->misc )
return QValueList<QImageTextKeyLang>();
return misc().list();
}
/*!
Records string \a s for the keyword \a key. The \a key should be a
portable keyword recognizable by other software - some suggested
values can be found in \link
http://www.libpng.org/pub/png/spec/1.2/png-1.2-pdg.html#C.Anc-text
the PNG specification \endlink. \a s can be any text. \a lang
should specify the language code (see
\link http://www.rfc-editor.org/rfc/rfc1766.txt RFC 1766 \endlink) or 0.
*/
void QImage::setText(const char* key, const char* lang, const QString& s)
{
QImageTextKeyLang x(key,lang);
misc().text_lang.replace(x,s);
}
#endif // QT_NO_IMAGE_TEXT
#ifdef Q_WS_QWS
/*!
\internal
*/
QGfx * QImage::graphicsContext()
{
QGfx * ret=0;
if(depth()) {
int w = qt_screen->mapToDevice( QSize(width(),height()) ).width();
int h = qt_screen->mapToDevice( QSize(width(),height()) ).height();
ret=QGfx::createGfx(depth(),bits(),w,h,bytesPerLine());
} else {
Undo prior accidental commit
13 years ago
qDebug("Trying to create image for null depth");
Add Qt3 development HEAD version
14 years ago
return 0;
}
if(depth()<=8) {
QRgb * tmp=colorTable();
int nc=numColors();
if(tmp==0) {
static QRgb table[2] = { qRgb(255,255,255), qRgb(0,0,0) };
tmp=table;
nc=2;
}
ret->setClut(tmp,nc);
}
return ret;
}
#endif