void
Gui::debugImage(const Image* image,
const RectI& roi,
const QString & filename )
{
if (image->getBitDepth() != eImageBitDepthFloat) {
qDebug() << "Debug image only works on float images.";
return;
}
RectI renderWindow;
RectI bounds = image->getBounds();
if ( roi.isNull() ) {
renderWindow = bounds;
} else {
if ( !roi.intersect(bounds, &renderWindow) ) {
qDebug() << "The RoI does not interesect the bounds of the image.";
return;
}
}
QImage output(renderWindow.width(), renderWindow.height(), QImage::Format_ARGB32);
const Color::Lut* lut = Color::LutManager::sRGBLut();
lut->validate();
Image::ReadAccess acc = image->getReadRights();
const float* from = (const float*)acc.pixelAt( renderWindow.left(), renderWindow.bottom() );
assert(from);
int srcNComps = (int)image->getComponentsCount();
int srcRowElements = srcNComps * bounds.width();
for ( int y = renderWindow.height() - 1; y >= 0; --y,
from += ( srcRowElements - srcNComps * renderWindow.width() ) ) {
QRgb* dstPixels = (QRgb*)output.scanLine(y);
assert(dstPixels);
unsigned error_r = 0x80;
unsigned error_g = 0x80;
unsigned error_b = 0x80;
for (int x = 0; x < renderWindow.width(); ++x, from += srcNComps, ++dstPixels) {
float r, g, b, a;
switch (srcNComps) {
case 1:
r = g = b = *from;
a = 1;
break;
case 2:
r = *from;
g = *(from + 1);
b = 0;
a = 1;
break;
case 3:
r = *from;
g = *(from + 1);
b = *(from + 2);
a = 1;
break;
case 4:
r = *from;
g = *(from + 1);
b = *(from + 2);
a = *(from + 3);
break;
default:
assert(false);
return;
}
error_r = (error_r & 0xff) + lut->toColorSpaceUint8xxFromLinearFloatFast(r);
error_g = (error_g & 0xff) + lut->toColorSpaceUint8xxFromLinearFloatFast(g);
error_b = (error_b & 0xff) + lut->toColorSpaceUint8xxFromLinearFloatFast(b);
assert(error_r < 0x10000 && error_g < 0x10000 && error_b < 0x10000);
*dstPixels = qRgba( U8(error_r >> 8),
U8(error_g >> 8),
U8(error_b >> 8),
U8(a * 255) );
}
}
U64 hashKey = image->getHashKey();
QString hashKeyStr = QString::number(hashKey);
QString realFileName = filename.isEmpty() ? QString( hashKeyStr + QString::fromUtf8(".png") ) : filename;
#ifdef DEBUG
qDebug() << "Writing image: " << realFileName;
renderWindow.debug();
#endif
output.save(realFileName);
} // Gui::debugImage
