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< td align = "right" valign = "center" > < img src = "logo32.png" align = "right" width = "64" height = "32" border = "0" > < / td > < / tr > < / table > < h1 align = center > TQBitmap Class Reference< / h1 >
< p > The TQBitmap class provides monochrome (1-bit depth) pixmaps.
< a href = "#details" > More...< / a >
< p > < tt > #include < < a href = "qbitmap-h.html" > ntqbitmap.h< / a > > < / tt >
< p > Inherits < a href = "ntqpixmap.html" > TQPixmap< / a > .
< p > < a href = "qbitmap-members.html" > List of all member functions.< / a >
< h2 > Public Members< / h2 >
< ul >
< li class = fn > < a href = "#TQBitmap" > < b > TQBitmap< / b > < / a > ()< / li >
< li class = fn > < a href = "#TQBitmap-2" > < b > TQBitmap< / b > < / a > ( int w, int h, bool clear = FALSE, TQPixmap::Optimization optimization = TQPixmap::DefaultOptim )< / li >
< li class = fn > < a href = "#TQBitmap-3" > < b > TQBitmap< / b > < / a > ( const TQSize & size, bool clear = FALSE, TQPixmap::Optimization optimization = TQPixmap::DefaultOptim )< / li >
< li class = fn > < a href = "#TQBitmap-4" > < b > TQBitmap< / b > < / a > ( int w, int h, const uchar * bits, bool isXbitmap = FALSE )< / li >
< li class = fn > < a href = "#TQBitmap-5" > < b > TQBitmap< / b > < / a > ( const TQSize & size, const uchar * bits, bool isXbitmap = FALSE )< / li >
< li class = fn > < a href = "#TQBitmap-6" > < b > TQBitmap< / b > < / a > ( const TQBitmap & bitmap )< / li >
< li class = fn > < a href = "#TQBitmap-7" > < b > TQBitmap< / b > < / a > ( const TQString & fileName, const char * format = 0 )< / li >
< li class = fn > TQBitmap & < a href = "#operator-eq" > < b > operator=< / b > < / a > ( const TQBitmap & bitmap )< / li >
< li class = fn > TQBitmap & < a href = "#operator-eq-2" > < b > operator=< / b > < / a > ( const TQPixmap & pixmap )< / li >
< li class = fn > TQBitmap & < a href = "#operator-eq-3" > < b > operator=< / b > < / a > ( const TQImage & image )< / li >
< li class = fn > TQBitmap < a href = "#xForm" > < b > xForm< / b > < / a > ( const TQWMatrix & matrix ) const< / li >
< / ul >
< hr > < a name = "details" > < / a > < h2 > Detailed Description< / h2 >
The TQBitmap class provides monochrome (1-bit depth) pixmaps.
< p >
< p > The TQBitmap class is a monochrome off-screen paint device used
mainly for creating custom < a href = "ntqcursor.html" > TQCursor< / a > and < a href = "ntqbrush.html" > TQBrush< / a > objects, in
< a href = "ntqpixmap.html#setMask" > TQPixmap::setMask< / a > () and for < a href = "ntqregion.html" > TQRegion< / a > .
< p > A TQBitmap is a < a href = "ntqpixmap.html" > TQPixmap< / a > with a < a href = "ntqpixmap.html#depth" > depth< / a >
of 1. If a pixmap with a depth greater than 1 is assigned to a
bitmap, the bitmap will be dithered automatically. A TQBitmap is
guaranteed to always have the depth 1, unless it is
< a href = "ntqpixmap.html#isNull" > TQPixmap::isNull< / a > () which has depth 0.
< p > When drawing in a TQBitmap (or TQPixmap with depth 1), we recommend
using the < a href = "ntqcolor.html" > TQColor< / a > objects < tt > TQt::color0< / tt > and < tt > TQt::color1< / tt > .
Painting with < tt > color0< / tt > sets the bitmap bits to 0, and painting
with < tt > color1< / tt > sets the bits to 1. For a bitmap, 0-bits indicate
background (or transparent) and 1-bits indicate foreground (or
opaque). Using the < tt > black< / tt > and < tt > white< / tt > TQColor objects make no
sense because the < a href = "ntqcolor.html#pixel" > TQColor::pixel< / a > () value is not necessarily 0 for
black and 1 for white.
< p > The TQBitmap can be transformed (translated, scaled, sheared or
rotated) using < a href = "#xForm" > xForm< / a > ().
< p > Just like the < a href = "ntqpixmap.html" > TQPixmap< / a > class, TQBitmap is optimized by the use of
< a href = "shclass.html" > implicit sharing< / a > , so it is very
efficient to pass TQBitmap objects as arguments.
< p > < p > See also < a href = "ntqpixmap.html" > TQPixmap< / a > , < a href = "ntqpainter.html#drawPixmap" > TQPainter::drawPixmap< / a > (), < a href = "ntqpaintdevice.html#bitBlt" > bitBlt< / a > (), < a href = "shclass.html" > Shared Classes< / a > , < a href = "graphics.html" > Graphics Classes< / a > , < a href = "images.html" > Image Processing Classes< / a > , and < a href = "shared.html" > Implicitly and Explicitly Shared Classes< / a > .
< hr > < h2 > Member Function Documentation< / h2 >
< h3 class = fn > < a name = "TQBitmap" > < / a > TQBitmap::TQBitmap ()
< / h3 >
Constructs a null bitmap.
< p > < p > See also < a href = "ntqpixmap.html#isNull" > TQPixmap::isNull< / a > ().
< h3 class = fn > < a name = "TQBitmap-2" > < / a > TQBitmap::TQBitmap ( int w, int h, bool clear = FALSE, < a href = "ntqpixmap.html#Optimization-enum" > TQPixmap::Optimization< / a > optimization = TQPixmap::DefaultOptim )
< / h3 >
Constructs a bitmap with width < em > w< / em > and height < em > h< / em > .
< p > The contents of the bitmap is uninitialized if < em > clear< / em > is FALSE;
otherwise it is filled with pixel value 0 (the < a href = "ntqcolor.html" > TQColor< / a > < tt > TQt::color0< / tt > ).
< p > The optional < em > optimization< / em > argument specifies the optimization
setting for the bitmap. The default optimization should be used in
most cases. Games and other pixmap-intensive applications may
benefit from setting this argument; see < a href = "ntqpixmap.html#Optimization-enum" > TQPixmap::Optimization< / a > .
< p > < p > See also < a href = "ntqpixmap.html#setOptimization" > TQPixmap::setOptimization< / a > () and < a href = "ntqpixmap.html#setDefaultOptimization" > TQPixmap::setDefaultOptimization< / a > ().
< h3 class = fn > < a name = "TQBitmap-3" > < / a > TQBitmap::TQBitmap ( const < a href = "ntqsize.html" > TQSize< / a > & size, bool clear = FALSE, < a href = "ntqpixmap.html#Optimization-enum" > TQPixmap::Optimization< / a > optimization = TQPixmap::DefaultOptim )
< / h3 >
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
< p > Constructs a bitmap with the size < em > size< / em > .
< p > The contents of the bitmap is uninitialized if < em > clear< / em > is FALSE;
otherwise it is filled with pixel value 0 (the < a href = "ntqcolor.html" > TQColor< / a > < tt > TQt::color0< / tt > ).
< p > The optional < em > optimization< / em > argument specifies the optimization
setting for the bitmap. The default optimization should be used in
most cases. Games and other pixmap-intensive applications may
benefit from setting this argument; see < a href = "ntqpixmap.html#Optimization-enum" > TQPixmap::Optimization< / a > .
< h3 class = fn > < a name = "TQBitmap-4" > < / a > TQBitmap::TQBitmap ( int w, int h, const uchar * bits, bool isXbitmap = FALSE )
< / h3 >
Constructs a bitmap with width < em > w< / em > and height < em > h< / em > and sets the
contents to < em > bits< / em > .
< p > The < em > isXbitmap< / em > flag should be TRUE if < em > bits< / em > was generated by
the X11 bitmap program. The X bitmap bit order is little endian.
The < a href = "tqimage.html" > TQImage< / a > documentation discusses bit order of monochrome images.
< p > Example (creates an arrow bitmap):
< pre >
uchar arrow_bits[] = { 0x3f, 0x1f, 0x0f, 0x1f, 0x3b, 0x71, 0xe0, 0xc0 };
TQBitmap bm( 8, 8, arrow_bits, TRUE );
< / pre >
< h3 class = fn > < a name = "TQBitmap-5" > < / a > TQBitmap::TQBitmap ( const < a href = "ntqsize.html" > TQSize< / a > & size, const uchar * bits, bool isXbitmap = FALSE )
< / h3 >
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
< p > Constructs a bitmap with the size < em > size< / em > and sets the contents to
< em > bits< / em > .
< p > The < em > isXbitmap< / em > flag should be TRUE if < em > bits< / em > was generated by
the X11 bitmap program. The X bitmap bit order is little endian.
The < a href = "tqimage.html" > TQImage< / a > documentation discusses bit order of monochrome images.
< h3 class = fn > < a name = "TQBitmap-6" > < / a > TQBitmap::TQBitmap ( const < a href = "ntqbitmap.html" > TQBitmap< / a > & bitmap )
< / h3 >
Constructs a bitmap that is a copy of < em > bitmap< / em > .
< h3 class = fn > < a name = "TQBitmap-7" > < / a > TQBitmap::TQBitmap ( const < a href = "tqstring.html" > TQString< / a > & fileName, const char * format = 0 )
< / h3 >
Constructs a bitmap from the file < em > fileName< / em > . If the file does
not exist or is of an unknown format, the bitmap becomes a null
bitmap.
< p > The parameters < em > fileName< / em > and < em > format< / em > are passed on to
< a href = "ntqpixmap.html#load" > TQPixmap::load< / a > (). Dithering will be performed if the file format
uses more than 1 bit per pixel.
< p > < p > See also < a href = "ntqpixmap.html#isNull" > TQPixmap::isNull< / a > (), < a href = "ntqpixmap.html#load" > TQPixmap::load< / a > (), < a href = "ntqpixmap.html#loadFromData" > TQPixmap::loadFromData< / a > (), < a href = "ntqpixmap.html#save" > TQPixmap::save< / a > (), and < a href = "ntqpixmap.html#imageFormat" > TQPixmap::imageFormat< / a > ().
< h3 class = fn > < a href = "ntqbitmap.html" > TQBitmap< / a > & < a name = "operator-eq" > < / a > TQBitmap::operator= ( const < a href = "ntqbitmap.html" > TQBitmap< / a > & bitmap )
< / h3 >
Assigns the bitmap < em > bitmap< / em > to this bitmap and returns a
reference to this bitmap.
< h3 class = fn > < a href = "ntqbitmap.html" > TQBitmap< / a > & < a name = "operator-eq-2" > < / a > TQBitmap::operator= ( const < a href = "ntqpixmap.html" > TQPixmap< / a > & pixmap )
< / h3 >
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
< p > Assigns the pixmap < em > pixmap< / em > to this bitmap and returns a
reference to this bitmap.
< p > Dithering will be performed if the pixmap has a < a href = "ntqpixmap.html#depth" > TQPixmap::depth< / a > ()
greater than 1.
< h3 class = fn > < a href = "ntqbitmap.html" > TQBitmap< / a > & < a name = "operator-eq-3" > < / a > TQBitmap::operator= ( const < a href = "tqimage.html" > TQImage< / a > & image )
< / h3 >
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
< p > Converts the image < em > image< / em > to a bitmap and assigns the result to
this bitmap. Returns a reference to the bitmap.
< p > Dithering will be performed if the image has a < a href = "tqimage.html#depth" > TQImage::depth< / a > ()
greater than 1.
< h3 class = fn > < a href = "ntqbitmap.html" > TQBitmap< / a > < a name = "xForm" > < / a > TQBitmap::xForm ( const < a href = "ntqwmatrix.html" > TQWMatrix< / a > & matrix ) const
< / h3 >
Returns a transformed copy of this bitmap by using < em > matrix< / em > .
< p > This function does exactly the same as < a href = "ntqpixmap.html#xForm" > TQPixmap::xForm< / a > (), except
that it returns a TQBitmap instead of a < a href = "ntqpixmap.html" > TQPixmap< / a > .
< p > < p > See also < a href = "ntqpixmap.html#xForm" > TQPixmap::xForm< / a > ().
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