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Implement DXT3 alpha.

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Unknown W. Brackets 2013-05-10 00:48:42 -07:00
parent c937a22f26
commit 4b91c7e707
1 changed files with 10 additions and 7 deletions
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17
GPU/GLES/TextureCache.cpp
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@ -619,7 +619,16 @@ static void decodeDXT1Block(u32 *dst, const DXT1Block *src, int pitch, bool igno
static void decodeDXT3Block(u32 *dst, const DXT3Block *src, int pitch)
{
decodeDXT1Block(dst, &src->color, pitch, true);
// Alpha: TODO
for (int y = 0; y < 4; y++) {
u32 line = src->alphaLines[y];
for (int x = 0; x < 4; x++) {
const u8 a4 = line & 0xF;
dst[x] = (dst[x] & 0xFFFFFF) | (a4 << 24) | (a4 << 28);
line >>= 4;
}
dst += pitch;
}
}
static inline u8 lerp8(const DXT5Block *src, int n) {
@ -1229,18 +1238,12 @@ void *TextureCache::DecodeTextureLevel(u8 format, u8 clutformat, int level, u32
case GE_TFMT_DXT3:
dstFmt = GL_UNSIGNED_BYTE;
{
static bool dxt3Reported = false;
if (!dxt3Reported)
ERROR_LOG_REPORT(G3D, "Warning: DXT3 textures not well supported");
dxt3Reported = true;
int minw = std::min(bufw, w);
tmpTexBuf32.resize(std::max(bufw, w) * h);
tmpTexBufRearrange.resize(std::max(bufw, w) * h);
u32 *dst = tmpTexBuf32.data();
DXT3Block *src = (DXT3Block*)texptr;
// Alpha is off
for (int y = 0; y < h; y += 4) {
u32 blockIndex = (y / 4) * (bufw / 4);
for (int x = 0; x < minw; x += 4) {