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Added support for LATC/3DC texture compression.

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bkaradzic
2013-01-20 12:47:29 -08:00
parent 6eed7bdccb
commit c26f8f4718
15 changed files with 154 additions and 74 deletions
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115
src/dds.cpp
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@@ -18,6 +18,8 @@ namespace bgfx
#define DDS_DXT3 BX_MAKEFOURCC('D', 'X', 'T', '3')
#define DDS_DXT4 BX_MAKEFOURCC('D', 'X', 'T', '4')
#define DDS_DXT5 BX_MAKEFOURCC('D', 'X', 'T', '5')
#define DDS_ATI1 BX_MAKEFOURCC('A', 'T', 'I', '1')
#define DDS_ATI2 BX_MAKEFOURCC('A', 'T', 'I', '2')
#define D3DFMT_A16B16G16R16F 113
@@ -165,7 +167,7 @@ void decodeBlockDxt1(uint8_t _dst[16*4], const uint8_t _src[8])
void decodeBlockDxt23A(uint8_t _dst[16*4], const uint8_t _src[8])
{
for (uint32_t ii = 3, next = 0; ii < 16*4; ii += 4, next += 4)
for (uint32_t ii = 0, next = 0; ii < 16*4; ii += 4, next += 4)
{
uint32_t c0 = (_src[next>>3] >> (next&7) ) & 0xf;
_dst[ii] = bitRangeConvert(c0, 4, 8);
@@ -197,20 +199,18 @@ void decodeBlockDxt45A(uint8_t _dst[16*4], const uint8_t _src[8])
alpha[7] = 255;
}
for (uint32_t ii = 3, next = 8*2; ii < 16*4; ii += 4, ++next)
uint32_t idx0 = _src[2];
uint32_t idx1 = _src[5];
idx0 |= uint32_t(_src[3])<<8;
idx1 |= uint32_t(_src[6])<<8;
idx0 |= uint32_t(_src[4])<<16;
idx1 |= uint32_t(_src[7])<<16;
for (uint32_t ii = 0; ii < 8*4; ii += 4)
{
uint32_t bit = (_src[next>>3] >> (next&7) ) & 1;
uint32_t idx = bit;
++next;
bit = (_src[next>>3] >> (next&7) ) & 1;
idx += bit << 1;
++next;
bit = (_src[next>>3] >> (next&7) ) & 1;
idx += bit << 2;
_dst[ii] = alpha[idx & 7];
_dst[ii] = alpha[idx0&7];
_dst[ii+32] = alpha[idx1&7];
idx0 >>= 3;
idx1 >>= 3;
}
}
@@ -233,7 +233,7 @@ void Mip::decode(uint8_t* _dst)
switch (m_type)
{
case TextureFormat::Dxt1:
case TextureFormat::BC1:
for (uint32_t yy = 0; yy < height; ++yy)
{
for (uint32_t xx = 0; xx < width; ++xx)
@@ -242,46 +242,91 @@ void Mip::decode(uint8_t* _dst)
src += 8;
uint8_t* dst = &_dst[(yy*pitch+xx*4)*4];
memcpy(dst, temp, 16);
memcpy(&dst[pitch], &temp[16], 16);
memcpy(&dst[0*pitch], &temp[ 0], 16);
memcpy(&dst[1*pitch], &temp[16], 16);
memcpy(&dst[2*pitch], &temp[32], 16);
memcpy(&dst[3*pitch], &temp[48], 16);
}
}
break;
case TextureFormat::Dxt3:
case TextureFormat::BC2:
for (uint32_t yy = 0; yy < height; ++yy)
{
for (uint32_t xx = 0; xx < width; ++xx)
{
decodeBlockDxt23A(temp, src);
decodeBlockDxt23A(temp+3, src);
src += 8;
decodeBlockDxt(temp, src);
src += 8;
uint8_t* dst = &_dst[(yy*pitch+xx*4)*4];
memcpy(dst, temp, 16);
memcpy(&dst[pitch], &temp[16], 16);
memcpy(&dst[0*pitch], &temp[ 0], 16);
memcpy(&dst[1*pitch], &temp[16], 16);
memcpy(&dst[2*pitch], &temp[32], 16);
memcpy(&dst[3*pitch], &temp[48], 16);
}
}
break;
case TextureFormat::Dxt5:
case TextureFormat::BC3:
for (uint32_t yy = 0; yy < height; ++yy)
{
for (uint32_t xx = 0; xx < width; ++xx)
{
decodeBlockDxt45A(temp+3, src);
src += 8;
decodeBlockDxt(temp, src);
src += 8;
uint8_t* dst = &_dst[(yy*pitch+xx*4)*4];
memcpy(&dst[0*pitch], &temp[ 0], 16);
memcpy(&dst[1*pitch], &temp[16], 16);
memcpy(&dst[2*pitch], &temp[32], 16);
memcpy(&dst[3*pitch], &temp[48], 16);
}
}
break;
case TextureFormat::BC4:
for (uint32_t yy = 0; yy < height; ++yy)
{
for (uint32_t xx = 0; xx < width; ++xx)
{
decodeBlockDxt45A(temp, src);
src += 8;
decodeBlockDxt(temp, src);
src += 8;
uint8_t* dst = &_dst[(yy*pitch+xx*4)*4];
memcpy(dst, temp, 16);
memcpy(&dst[pitch], &temp[16], 16);
memcpy(&dst[0*pitch], &temp[ 0], 16);
memcpy(&dst[1*pitch], &temp[16], 16);
memcpy(&dst[2*pitch], &temp[32], 16);
memcpy(&dst[3*pitch], &temp[48], 16);
}
}
break;
case TextureFormat::BC5:
for (uint32_t yy = 0; yy < height; ++yy)
{
for (uint32_t xx = 0; xx < width; ++xx)
{
decodeBlockDxt45A(temp+1, src);
src += 8;
decodeBlockDxt45A(temp+2, src);
src += 8;
for (uint32_t ii = 0; ii < 16; ++ii)
{
float nx = temp[ii*4+2]*2.0f/255.0f - 1.0f;
float ny = temp[ii*4+1]*2.0f/255.0f - 1.0f;
float nz = sqrtf(1.0f - nx*nx - ny*ny);
temp[ii*4+0] = uint8_t( (nz + 1.0f)*255.0f/2.0f);
temp[ii*4+3] = 0;
}
uint8_t* dst = &_dst[(yy*pitch+xx*4)*4];
memcpy(&dst[0*pitch], &temp[ 0], 16);
memcpy(&dst[1*pitch], &temp[16], 16);
memcpy(&dst[2*pitch], &temp[32], 16);
memcpy(&dst[3*pitch], &temp[48], 16);
}
@@ -417,21 +462,33 @@ bool parseDds(Dds& _dds, const Memory* _mem)
switch (fourcc)
{
case DDS_DXT1:
type = TextureFormat::Dxt1;
type = TextureFormat::BC1;
blockSize = 8;
bpp = 4;
break;
case DDS_DXT2:
case DDS_DXT3:
type = TextureFormat::Dxt3;
type = TextureFormat::BC2;
blockSize = 16;
bpp = 4;
break;
case DDS_DXT4:
case DDS_DXT5:
type = TextureFormat::Dxt5;
type = TextureFormat::BC3;
blockSize = 16;
bpp = 4;
break;
case DDS_ATI1:
type = TextureFormat::BC4;
blockSize = 16;
bpp = 4;
break;
case DDS_ATI2:
type = TextureFormat::BC5;
blockSize = 16;
bpp = 4;
break;