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GRAPHICS: Handle 4bpp paletted PNG files.

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This commit is contained in:
Alyssa Milburn 2011-04-14 21:08:03 +02:00
parent 6ecc460b41
commit c60e773981
1 changed files with 13 additions and 2 deletions
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15
graphics/png.cpp
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@ -170,11 +170,18 @@ Graphics::Surface *PNG::getSurface(const PixelFormat &format) {
}
} else {
byte index, r, g, b;
bool otherPixel = false;
// Convert the indexed surface to the target pixel format
for (uint16 i = 0; i < output->h; i++) {
for (uint16 j = 0; j < output->w; j++) {
index = *src;
if (_header.bitDepth != 4)
index = *src;
else if (!otherPixel)
index = (*src) >> 4;
else
index = (*src) & 0xf;
r = _palette[index * 4 + 0];
g = _palette[index * 4 + 1];
b = _palette[index * 4 + 2];
@ -185,8 +192,12 @@ Graphics::Surface *PNG::getSurface(const PixelFormat &format) {
else
*((uint32 *)output->getBasePtr(j, i)) = format.ARGBToColor(a, r, g, b);
src++;
if (_header.bitDepth != 4 || otherPixel)
src++;
otherPixel = !otherPixel;
}
if (_header.bitDepth == 4)
src += output->w/2;
}
}