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Finally correct fix for setPixel out of bounds error

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Kovid Goyal 2010-07-03 19:36:46 -06:00
parent 8376081885
commit a0ae751a5e
1 changed files with 15 additions and 13 deletions
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26
src/calibre/gui2/pictureflow/pictureflow.cpp
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@ -579,12 +579,10 @@ void PictureFlowPrivate::resetSlides()
static QImage prepareSurface(QImage img, int w, int h)
{
Qt::TransformationMode mode = Qt::SmoothTransformation;
img = img.scaled(w, h, Qt::IgnoreAspectRatio, mode);
img = img.scaled(w, h, Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
// slightly larger, to accommodate for the reflection
int hs = int(h * REFLECTION_FACTOR);
int hofs = 0;
// offscreen buffer: black is sweet
QImage result(hs, w, QImage::Format_RGB16);
@ -595,21 +593,20 @@ static QImage prepareSurface(QImage img, int w, int h)
// (and much better and faster to work row-wise, i.e in one scanline)
for(int x = 0; x < w; x++)
for(int y = 0; y < h; y++)
result.setPixel(hofs + y, x, img.pixel(x, y));
result.setPixel(y, x, img.pixel(x, y));
// create the reflection
int ht = hs - h - hofs;
int hte = ht;
int ht = hs - h;
for(int x = 0; x < w; x++)
for(int y = 0; y < ht; y++)
{
QRgb color = img.pixel(x, img.height()-y-1);
//QRgb565 color = img.scanLine(img.height()-y-1) + x*sizeof(QRgb565); //img.pixel(x, img.height()-y-1);
int a = qAlpha(color);
int r = qRed(color) * a / 256 * (hte - y) / hte * 3/5;
int g = qGreen(color) * a / 256 * (hte - y) / hte * 3/5;
int b = qBlue(color) * a / 256 * (hte - y) / hte * 3/5;
result.setPixel(h+hofs+y, x, qRgb(r, g, b));
int r = qRed(color) * a / 256 * (ht - y) / ht * 3/5;
int g = qGreen(color) * a / 256 * (ht - y) / ht * 3/5;
int b = qBlue(color) * a / 256 * (ht - y) / ht * 3/5;
result.setPixel(h+y, x, qRgb(r, g, b));
}
return result;
@ -801,9 +798,14 @@ QRect PictureFlowPrivate::renderCenterSlide(const SlideInfo &slide) {
QRect rect(buffer.width()/2 - sw/2, 0, sw, h-1);
int left = rect.left();
for(int x = 0; x < MIN(h-1, sh-1); x++)
for(int y = 0; y < sw; y++)
if (left >= 0) {
int xcon = MIN(h-1, sh-1);
int ycon = MIN(sw, buffer.width() - left);
for(int x = 0; x < xcon; x++)
for(int y = 0; y < ycon; y++)
buffer.setPixel(left + y, 1+x, src->pixel(x, y));
}
return rect;
}