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Apply bayer dither to TGA16 export for smoother lightmaps

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This commit is contained in:
kaetemi 2015-03-30 11:22:25 +02:00
parent 25a399ae9e
commit 76a1deb882
1 changed files with 27 additions and 0 deletions
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27
code/nel/tools/3d/tga_2_dds/tga2dds.cpp
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@ -359,6 +359,13 @@ void dividSize (CBitmap &bitmap)
}
}
const int bayerDiv8[4][4] = {
0, 4, 1, 5,
6, 2, 7, 3,
1, 5, 0, 4,
7, 3, 6, 2,
};
// ***************************************************************************
int main(int argc, char **argv)
{
@ -601,6 +608,26 @@ int main(int argc, char **argv)
Reduce--;
}
if (algo == TGA16)
{
// Apply bayer dither
CObjectVector<uint8> &rgba = picSrc.getPixels(0);
const uint32 w = picSrc.getWidth(0);
uint32 x = 0;
uint32 y = 0;
for (uint32 i = 0; i < rgba.size(); i += 4)
{
NLMISC::CRGBA &c = reinterpret_cast<NLMISC::CRGBA &>(rgba[i]);
c.R = (uint8)std::min(255, (int)c.R + bayerDiv8[x % 4][y % 4]);
c.G = (uint8)std::min(255, (int)c.G + bayerDiv8[x % 4][y % 4]);
c.B = (uint8)std::min(255, (int)c.B + bayerDiv8[x % 4][y % 4]);
++x;
x %= w;
if (x == 0)
++y;
}
}
// 8 or 16 bits TGA or PNG ?
if ((algo == TGA16) || (algo == TGA8) || (algo == PNG16) || (algo == PNG8))
{