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354 lines
9.3 KiB
354 lines
9.3 KiB
/*
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* Copyright (C) 2003 Fredrik Höglund <fredrik@kde.org>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include <kglobal.h>
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#include <tqwidget.h>
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#include <tqpainter.h>
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#include <tqpixmap.h>
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#include <tqstring.h>
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#include <tqcursor.h>
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#include <kglobal.h>
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#include <X11/Xlib.h>
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#include <X11/Xutil.h>
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#include <X11/extensions/Xrender.h>
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#include <X11/Xcursor/Xcursor.h>
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#include "previewwidget.h"
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extern bool qt_has_xft;
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extern bool qt_use_xrender;
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namespace {
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// Preview cursors
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const char *cursor_names[] =
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{
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"left_ptr",
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"left_ptr_watch",
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"watch",
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"hand2",
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"question_arrow",
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"sb_h_double_arrow",
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"sb_v_double_arrow",
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"bottom_left_corner",
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"bottom_right_corner",
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"fleur",
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"pirate",
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"cross",
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"X_cursor",
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"right_ptr",
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"right_side",
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"right_tee",
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"sb_right_arrow",
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"sb_right_tee",
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"base_arrow_down",
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"base_arrow_up",
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"bottom_side",
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"bottom_tee",
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"center_ptr",
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"circle",
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"dot",
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"dot_box_mask",
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"dot_box_mask",
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"double_arrow",
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"draped_box",
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"left_side",
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"left_tee",
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"ll_angle",
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"top_side",
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"top_tee",
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};
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const int numCursors = 6; // The number of cursors in the above list to be previewed
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const int previewSize = 24; // The cursor size to be used in the preview widget
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const int cursorSpacing = 20;
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}
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class PreviewCursor
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{
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public:
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PreviewCursor();
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~PreviewCursor();
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void load( const TQString &, const TQString & );
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const Picture picture() const { return m_pict; }
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const Cursor handle() const { return m_handle; }
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const int width() const { return m_width; }
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const int height() const { return m_height; }
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private:
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Picture createPicture( const XcursorImage* ) const;
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void cropCursorImage( XcursorImage*& ) const;
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Picture m_pict;
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Cursor m_handle;
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int m_width;
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int m_height;
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}; // class PreviewCursor
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PreviewCursor::PreviewCursor() :
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m_pict( 0 ), m_handle( 0 ), m_width( 0 ), m_height( 0 )
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{
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}
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void PreviewCursor::load( const TQString &name, const TQString &theme )
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{
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Display *dpy = TQPaintDevice::x11AppDisplay();
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if ( m_pict ) XRenderFreePicture( dpy, m_pict );
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if ( m_handle ) XFreeCursor( dpy, m_handle );
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m_pict = 0;
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m_handle = 0;
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m_width = m_height = 0;
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// Load the preview cursor image
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XcursorImage *image =
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XcursorLibraryLoadImage( name.latin1(), theme.latin1(), previewSize );
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// If the theme doesn't have this cursor, load the default cursor for now
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if ( !image )
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image = XcursorLibraryLoadImage( "left_ptr", theme.latin1(), previewSize );
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// TODO The old classic X cursors
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if ( !image )
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return;
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// Auto-crop the image (some cursor themes use a fixed image size
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// for all cursors, and doing this results in correctly centered images)
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cropCursorImage( image );
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m_pict = createPicture( image );
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m_width = image->width;
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m_height = image->height;
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// Scale the image if its height is greater than 2x the requested size
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if ( m_height > previewSize * 2.0 ) {
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double factor = double( previewSize * 2.0 / m_height );
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XTransform xform = {
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{{ XDoubleToFixed(1.0), XDoubleToFixed(0), XDoubleToFixed(0) },
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{ XDoubleToFixed(0), XDoubleToFixed(1.0), XDoubleToFixed(0) },
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{ XDoubleToFixed(0), XDoubleToFixed(0), XDoubleToFixed(factor) }}
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};
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XRenderSetPictureTransform( dpy, m_pict, &xform );
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m_width = int( m_width * factor );
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m_height = int( m_height * factor );
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}
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// We don't need this image anymore
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XcursorImageDestroy( image );
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// Load the actual cursor we will use
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int size = XcursorGetDefaultSize( dpy );
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XcursorImages *images = XcursorLibraryLoadImages( name.latin1(), theme.latin1(), size );
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if ( images ) {
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m_handle = XcursorImagesLoadCursor( dpy, images );
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XcursorImagesDestroy( images );
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} else {
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images = XcursorLibraryLoadImages( "left_ptr", theme.latin1(), size );
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m_handle = XcursorImagesLoadCursor( dpy, images );
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XcursorImagesDestroy( images );
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}
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}
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PreviewCursor::~PreviewCursor()
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{
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if ( m_handle ) XFreeCursor( TQPaintDevice::x11AppDisplay(), m_handle );
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if ( m_pict ) XRenderFreePicture( TQPaintDevice::x11AppDisplay(), m_pict );
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}
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Picture PreviewCursor::createPicture( const XcursorImage* image ) const
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{
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Display *dpy = TQPaintDevice::x11AppDisplay();
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XImage ximage;
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ximage.width = image->width;
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ximage.height = image->height;
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ximage.xoffset = 0;
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ximage.format = ZPixmap;
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ximage.data = reinterpret_cast<char*>( image->pixels );
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ximage.byte_order = ImageByteOrder( dpy );
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ximage.bitmap_unit = 32;
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ximage.bitmap_bit_order = ximage.byte_order;
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ximage.bitmap_pad = 32;
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ximage.depth = 32;
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ximage.bits_per_pixel = 32;
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ximage.bytes_per_line = image->width * 4;
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ximage.red_mask = 0x00ff0000;
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ximage.green_mask = 0x0000ff00;
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ximage.blue_mask = 0x000000ff;
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ximage.obdata = 0;
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XInitImage( &ximage );
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Pixmap pix = XCreatePixmap( dpy, DefaultRootWindow(dpy), ximage.width, ximage.height, 32 );
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GC gc = XCreateGC( dpy, pix, 0, NULL );
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XPutImage( dpy, pix, gc, &ximage, 0, 0, 0, 0, ximage.width, ximage.height );
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XFreeGC( dpy, gc );
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XRenderPictFormat *fmt = XRenderFindStandardFormat( dpy, PictStandardARGB32 );
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Picture pict = XRenderCreatePicture( dpy, pix, fmt, 0, NULL );
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XFreePixmap( dpy, pix );
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return pict;
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}
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void PreviewCursor::cropCursorImage( XcursorImage *&image ) const
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{
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// Calculate the auto-crop rectangle
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TQRect r( TQPoint( image->width, image->height ), TQPoint() );
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XcursorPixel *pixels = image->pixels;
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for ( int y = 0; y < int(image->height); y++ ) {
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for ( int x = 0; x < int(image->width); x++ ) {
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if ( *(pixels++) >> 24 ) {
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if ( x < r.left() ) r.setLeft( x );
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if ( x > r.right() ) r.setRight( x );
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if ( y < r.top() ) r.setTop( y );
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if ( y > r.bottom() ) r.setBottom( y );
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}
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}
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}
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// Normalize the rectangle
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r = r.normalize();
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// Don't crop the image if the size isn't going to change
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if ( r.width() == int( image->width ) && r.height() == int( image->height ) )
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return;
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// Create the new image
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XcursorImage *cropped = XcursorImageCreate( r.width(), r.height() );
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XcursorPixel *src = image->pixels + r.top() * image->width + r.left();
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XcursorPixel *dst = cropped->pixels;
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for ( int y = 0; y < r.height(); y++, src += (image->width - r.width()) ) {
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for ( int x = 0; x < r.width(); x++ ) {
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*(dst++) = *(src++);
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}
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}
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// Destroy the original
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XcursorImageDestroy( image );
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image = cropped;
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}
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// ------------------------------------------------------------------------------------------------
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PreviewWidget::PreviewWidget( TQWidget *parent, const char *name )
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: TQWidget( parent, name )
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{
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cursors = new PreviewCursor* [ numCursors ];
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for ( int i = 0; i < numCursors; i++ )
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cursors[i] = new PreviewCursor;
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current = -1;
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setMouseTracking( true );
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setFixedHeight( previewSize + 20 );
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}
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PreviewWidget::~PreviewWidget()
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{
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for ( int i = 0; i < numCursors; i++ )
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delete cursors[i];
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delete [] cursors;
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}
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void PreviewWidget::setTheme( const TQString &theme )
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{
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tqsetUpdatesEnabled( false );
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int minHeight = previewSize + 20; // Minimum height of the preview widget
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int maxHeight = height(); // Tallest cursor height
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int maxWidth = previewSize; // Widest cursor width
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for ( int i = 0; i < numCursors; i++ ) {
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cursors[i]->load( cursor_names[i], theme.latin1() );
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if ( cursors[i]->width() > maxWidth )
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maxWidth = cursors[i]->width();
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if ( cursors[i]->height() > maxHeight )
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maxHeight = cursors[i]->height();
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}
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current = -1;
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setFixedSize( ( maxWidth + cursorSpacing ) * numCursors, kMax( maxHeight, minHeight ) );
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tqsetUpdatesEnabled( true );
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tqrepaint( false );
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}
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void PreviewWidget::paintEvent( TQPaintEvent * )
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{
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TQPixmap buffer( size() );
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TQPainter p( &buffer );
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p.fillRect( rect(), tqcolorGroup().brush( TQColorGroup::Background ) );
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Picture dest;
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if ( !qt_has_xft || !qt_use_xrender ) {
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XRenderPictFormat *fmt = XRenderFindVisualFormat( x11Display(), (Visual*)buffer.x11Visual() );
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dest = XRenderCreatePicture( x11Display(), buffer.handle(), fmt, 0, NULL );
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} else
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dest = buffer.x11RenderHandle();
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int rwidth = width() / numCursors;
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for ( int i = 0; i < numCursors; i++ ) {
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if ( cursors[i]->picture() ) {
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XRenderComposite( x11Display(), PictOpOver,
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cursors[i]->picture(), 0, dest, 0, 0, 0, 0,
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rwidth * i + (rwidth - cursors[i]->width()) / 2,
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(height() - cursors[i]->height()) / 2,
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cursors[i]->width(), cursors[i]->height() );
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}
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}
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bitBlt( this, 0, 0, &buffer );
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if ( !qt_has_xft || !qt_use_xrender )
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XRenderFreePicture( x11Display(), dest );
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}
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void PreviewWidget::mouseMoveEvent( TQMouseEvent *e )
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{
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int pos = e->x() / ( width() / numCursors );
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if ( pos != current && pos < numCursors ) {
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XDefineCursor( x11Display(), winId(), cursors[pos]->handle() );
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current = pos;
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}
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}
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// vim: set noet ts=4 sw=4:
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