diff options
| author | gregory <gregory.hainaut@gmail.com> | 2012-07-01 17:18:04 +0200 |
|---|---|---|
| committer | gregory <gregory.hainaut@gmail.com> | 2012-07-01 17:18:04 +0200 |
| commit | 8f0aa388f4463528f9278e7c58e4d029b45b850d (patch) | |
| tree | f4e1a8bab800ab8ce59970d74584a9ef989feade /gui/imageviewer.cpp | |
| parent | 9cb30bec22c1c277a0bfb45628a0a59c36b1cfc5 (diff) | |
gui: new checkbox to visualize alpha channel of image
Diffstat (limited to 'gui/imageviewer.cpp')
| -rw-r--r-- | gui/imageviewer.cpp | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/gui/imageviewer.cpp b/gui/imageviewer.cpp index 7b1e425f..0e0657a3 100644 --- a/gui/imageviewer.cpp +++ b/gui/imageviewer.cpp @@ -19,6 +19,8 @@ ImageViewer::ImageViewer(QWidget *parent) SLOT(slotUpdate())); connect(opaqueCheckBox, SIGNAL(stateChanged(int)), SLOT(slotUpdate())); + connect(alphaCheckBox, SIGNAL(stateChanged(int)), + SLOT(slotUpdate())); QPixmap px(32, 32); QPainter p(&px); @@ -62,8 +64,9 @@ void ImageViewer::slotUpdate() double upperValue = upperSpinBox->value(); bool opaque = opaqueCheckBox->isChecked(); + bool alpha = alphaCheckBox->isChecked(); - if (lowerValue != 0.0 || upperValue != 1.0 || opaque) { + if (lowerValue != 0.0 || upperValue != 1.0 || opaque || alpha) { /* * Rescale the image. * @@ -95,11 +98,16 @@ void ImageViewer::slotUpdate() int g = qGreen(pixel); int b = qBlue(pixel); int a = qAlpha(pixel); - 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); + 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); + } } } } |