SLOT(slotUpdate()));
connect(flipCheckBox, SIGNAL(stateChanged(int)),
SLOT(slotUpdate()));
+ connect(opaqueCheckBox, SIGNAL(stateChanged(int)),
+ SLOT(slotUpdate()));
+ connect(alphaCheckBox, SIGNAL(stateChanged(int)),
+ SLOT(slotUpdate()));
QPixmap px(32, 32);
QPainter p(&px);
double lowerValue = lowerSpinBox->value();
double upperValue = upperSpinBox->value();
- if (lowerValue != 0.0 || upperValue != 1.0) {
+ bool opaque = opaqueCheckBox->isChecked();
+ bool alpha = alphaCheckBox->isChecked();
+
+ if (lowerValue != 0.0 || upperValue != 1.0 || opaque || alpha) {
/*
* Rescale the image.
*
int width = m_temp.width();
int height = m_temp.height();
+ int aMask = opaque ? 0xff : 0;
+
for (int y = 0; y < height; ++y) {
QRgb *scanline = (QRgb *)m_temp.scanLine(y);
for (int x = 0; x < width; ++x) {
int r = qRed(pixel);
int g = qGreen(pixel);
int b = qBlue(pixel);
- r = clamp(((r + offset) * scale) >> 8);
- g = clamp(((g + offset) * scale) >> 8);
- b = clamp(((b + offset) * scale) >> 8);
- int a = 255;
- scanline[x] = qRgba(r, g, b, a);
+ int a = qAlpha(pixel);
+ if (alpha) {
+ a = clamp(((a + offset) * scale) >> 8);
+ scanline[x] = qRgba(a, a, a, 0xff);
+ } else {
+ r = clamp(((r + offset) * scale) >> 8);
+ g = clamp(((g + offset) * scale) >> 8);
+ b = clamp(((b + offset) * scale) >> 8);
+ a |= aMask;
+ scanline[x] = qRgba(r, g, b, a);
+ }
}
}
}