drewcassidy/nvidia-texture-tools
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RGB conversion fixes.

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This commit is contained in:
castano 2007-07-17 10:00:48 +00:00
parent 2cc70162dd
commit 1308795378
3 changed files with 29 additions and 13 deletions
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11
src/nvimage/nvtt/CompressRGB.cpp
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@ -72,13 +72,13 @@ namespace
{
*shift = 0;
while((mask & 1) == 0) {
*shift++;
++(*shift);
mask >>= 1;
}
*size = 0;
while((mask & 1) == 1) {
*size++;
++(*size);
mask >>= 1;
}
}
@ -120,7 +120,7 @@ void nv::compressRGB(const Image * image, const OutputOptions & outputOptions, c
// Determine pitch.
uint pitch = computePitch(w, compressionOptions.bitcount);
void * dst = mem::malloc(pitch);
uint8 * dst = (uint8 *)mem::malloc(pitch + 4);
for (uint y = 0; y < h; y++)
{
@ -145,10 +145,7 @@ void nv::compressRGB(const Image * image, const OutputOptions & outputOptions, c
c |= convert(src[x].b, 8, bsize) << bshift;
c |= convert(src[x].a, 8, asize) << ashift;
*(uint *)dst = c;
++src;
dst = (uint8 *)dst + byteCount;
*(uint *)(dst + x * byteCount) = c;
}
}

9
src/nvimage/nvtt/CompressionOptions.cpp
View File

@ -108,6 +108,15 @@ void CompressionOptions::setPixelFormat(uint bitcount, uint rmask, uint gmask, u
nvCheck((gmask & amask) == 0);
nvCheck((bmask & amask) == 0);
if (bitcount != 32)
{
uint maxMask = (1 << bitcount);
nvCheck(maxMask > rmask);
nvCheck(maxMask > gmask);
nvCheck(maxMask > bmask);
nvCheck(maxMask > amask);
}
m.bitcount = bitcount;
m.rmask = rmask;
m.gmask = gmask;

20
src/nvimage/nvtt/dxtlib.cpp
View File

@ -68,10 +68,18 @@ namespace
return 0;
}
static int computeImageSize(int w, int h, Format format)
inline uint computePitch(uint w, uint bitsize)
{
uint p = w * ((bitsize + 7) / 8);
// Align to 32 bits.
return ((p + 3) / 4) * 4;
}
static int computeImageSize(uint w, uint h, uint bitCount, Format format)
{
if (format == Format_RGBA) {
return w * h * sizeof(Color32);
return h * computePitch(w, bitCount);
}
else {
return ((w + 3) / 4) * ((h + 3) / 4) * blockSize(format);
@ -124,7 +132,7 @@ static void outputHeader(const InputOptions::Private & inputOptions, const Outpu
}
else
{
header.setLinearSize(computeImageSize(img->width, img->height, compressionOptions.format));
header.setLinearSize(computeImageSize(img->width, img->height, compressionOptions.bitcount, compressionOptions.format));
if (compressionOptions.format == Format_DXT1 /*|| compressionOptions.format == Format_DXT1a*/) {
header.setFourCC('D', 'X', 'T', '1');
@ -376,6 +384,7 @@ bool nvtt::compress(const InputOptions & inputOptions, const OutputOptions & out
outputHeader(inputOptions.m, outputOptions, compressionOptions.m);
Format format = compressionOptions.m.format;
const uint bitCount = compressionOptions.m.bitcount;
for (int f = 0; f < inputOptions.m.faceCount; f++)
{
@ -389,7 +398,7 @@ bool nvtt::compress(const InputOptions & inputOptions, const OutputOptions & out
if (outputOptions.outputHandler)
{
int size = computeImageSize(mipmap.width, mipmap.height, format);
int size = computeImageSize(mipmap.width, mipmap.height, bitCount, format);
outputOptions.outputHandler->mipmap(size, mipmap.width, mipmap.height, mipmap.depth, mipmap.face, mipmap.mipLevel);
}
@ -460,6 +469,7 @@ bool nvtt::compress(const InputOptions & inputOptions, const OutputOptions & out
int nvtt::estimateSize(const InputOptions & inputOptions, const CompressionOptions & compressionOptions)
{
Format format = compressionOptions.m.format;
const uint bitCount = compressionOptions.m.bitcount;
int size = 0;
@ -470,7 +480,7 @@ int nvtt::estimateSize(const InputOptions & inputOptions, const CompressionOptio
int idx = f * inputOptions.m.mipmapCount + m;
const InputOptions::Private::Image & img = inputOptions.m.images[idx];
size += computeImageSize(img.width, img.height, format);
size += computeImageSize(img.width, img.height, bitCount, format);
if (!inputOptions.m.generateMipmaps || (inputOptions.m.maxLevel >= 0 && m >= inputOptions.m.maxLevel)) {
// continue with next face.