khtml/imload/imagepainter.cpp

   1 /*
   2     Progressive image displaying library.
   3
   4     Copyright (C) 2004,2005 Maks Orlovich (maksim@kde.org)
   5
   6     Permission is hereby granted, free of charge, to any person obtaining a copy
   7     of this software and associated documentation files (the "Software"), to deal
   8     in the Software without restriction, including without limitation the rights
   9     to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10     copies of the Software, and to permit persons to whom the Software is
  11     furnished to do so, subject to the following conditions:
  12
  13     The above copyright notice and this permission notice shall be included in
  14     all copies or substantial portions of the Software.
  15
  16     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17     IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18     FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
  19     AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  20     AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21     CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  22
  23 */
  24
  25 #include "imagepainter.h"
  26 #include "image.h"
  27 #include "pixmapplane.h"
  28 #include "imagemanager.h"
  29
  30 namespace khtmlImLoad {
  31
  32 ImagePainter::ImagePainter(Image* _image):image(_image), sizeRefd(false)
  33 { //No need to ref, default size.
  34     size = image->size();
  35 }
  36
  37 ImagePainter::ImagePainter(Image* _image, QSize _size):image(_image), size(_size), sizeRefd(false)
  38 {
  39     if (!ImageManager::isAcceptableScaleSize(_size.width(), _size.height()))
  40         setDefaultSize();
  41 }
  42
  43 ImagePainter::~ImagePainter()
  44 {
  45     if (sizeRefd)
  46         image->derefSize(size);
  47 }
  48
  49 ImagePainter::ImagePainter(const ImagePainter& src)
  50 {
  51     image = src.image;
  52     size  = src.size;
  53     sizeRefd = false;
  54 }
  55
  56 ImagePainter& ImagePainter::operator=(const ImagePainter& src)
  57 {
  58     if (sizeRefd)
  59         image->derefSize(size);
  60     image = src.image;
  61     size  = src.size;
  62     sizeRefd = false;
  63     return *this;
  64 }
  65
  66 void ImagePainter::setSize(QSize _size)
  67 {
  68     if (!ImageManager::isAcceptableScaleSize(_size.width(), _size.height())) {
  69         setDefaultSize();
  70         return;
  71     }
  72
  73     // Don't do anything if size didn't change,
  74     // to avoid dropping the image..
  75     if (size == _size)
  76         return;
  77
  78     if (sizeRefd)
  79         image->derefSize(size);
  80     size = _size;
  81     sizeRefd = false;
  82 }
  83
  84 void ImagePainter::setDefaultSize()
  85 {
  86     if (sizeRefd)
  87         image->derefSize(size);
  88     size = image->size();
  89     sizeRefd = false;
  90 }
  91
  92 void ImagePainter::paint(int dx, int dy, QPainter* p, int sx, int sy,
  93                          int width, int height)
  94 {
  95     if (!image->mayPaint())
  96         // ### fallback painting in case bg?
  97         return;
  98
  99     // Do our lazy ref if needed. Safe due to above
 100     if (!sizeRefd && size != image->size())
 101     {
 102         image->refSize(size);
 103         sizeRefd = true;
 104     }
 105
 106     PixmapPlane* plane = image->getSize(size);
 107
 108     if (plane->animProvider)
 109     {
 110         // Clip the request ourselves when animating..
 111         QSize imageSize = image->size();
 112
 113         if (width == -1)
 114             width  = imageSize.width();
 115         if (height == -1)
 116             height = imageSize.height();
 117
 118         QRect clippedRect = QRect(0, 0, imageSize.width(), imageSize.height())
 119                             & QRect(sx, sy, width, height);
 120         plane->animProvider->paint(dx, dy, p, clippedRect.x(), clippedRect.y(),
 121                                           clippedRect.width(), clippedRect.height());
 122         return;
 123     }
 124
 125     // non-animated, go straight to PixmapPlane; it clips itself
 126     plane->paint(dx, dy, p, sx, sy, width, height);
 127 }
 128
 129 }
 130
 131 // kate: indent-width 4; replace-tabs on; tab-width 4; space-indent on;