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texturec: Added BC4/5 compression.

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This commit is contained in:
Branimir Karadžić 2015-12-22 15:40:55 -08:00
parent 1a96194429
commit c82d3e86d9
5 changed files with 124 additions and 67 deletions
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2
3rdparty/.editorconfig vendored
View file

@ -11,3 +11,5 @@ indent_size = 4
[remotery/*]
indent_style = space
indent_size = 4
[libsquish/*]

46
3rdparty/libsquish/squish.cpp vendored
View file

@ -37,13 +37,18 @@ namespace squish {
static int FixFlags( int flags )
{
// grab the flag bits
int method = flags & ( kDxt1 | kDxt3 | kDxt5 );
int method = flags & ( kDxt1 | kDxt3 | kDxt5 | kBc4 | kBc5 );
int fit = flags & ( kColourIterativeClusterFit | kColourClusterFit | kColourRangeFit );
int extra = flags & kWeightColourByAlpha;
// set defaults
if( method != kDxt3 && method != kDxt5 )
if ( method != kDxt3
&& method != kDxt5
&& method != kBc4
&& method != kBc5 )
{
method = kDxt1;
}
if( fit != kColourRangeFit && fit != kColourIterativeClusterFit )
fit = kColourClusterFit;
@ -56,9 +61,34 @@ void CompressMasked( u8 const* rgba, int mask, void* block, int flags, float* me
// fix any bad flags
flags = FixFlags( flags );
if ( ( flags & ( kBc4 | kBc5 ) ) != 0 )
{
u8 alpha[16*4];
for( int i = 0; i < 16; ++i )
{
alpha[i*4 + 3] = rgba[i*4 + 0]; // copy R to A
}
u8* rBlock = reinterpret_cast< u8* >( block );
CompressAlphaDxt5( alpha, mask, rBlock );
if ( ( flags & ( kBc5 ) ) != 0 )
{
for( int i = 0; i < 16; ++i )
{
alpha[i*4 + 3] = rgba[i*4 + 1]; // copy G to A
}
u8* gBlock = reinterpret_cast< u8* >( block ) + 8;
CompressAlphaDxt5( alpha, mask, gBlock );
}
return;
}
// get the block locations
void* colourBlock = block;
void* alphaBock = block;
void* alphaBlock = block;
if( ( flags & ( kDxt3 | kDxt5 ) ) != 0 )
colourBlock = reinterpret_cast< u8* >( block ) + 8;
@ -87,9 +117,9 @@ void CompressMasked( u8 const* rgba, int mask, void* block, int flags, float* me
// compress alpha separately if necessary
if( ( flags & kDxt3 ) != 0 )
CompressAlphaDxt3( rgba, mask, alphaBock );
CompressAlphaDxt3( rgba, mask, alphaBlock );
else if( ( flags & kDxt5 ) != 0 )
CompressAlphaDxt5( rgba, mask, alphaBock );
CompressAlphaDxt5( rgba, mask, alphaBlock );
}
void Decompress( u8* rgba, void const* block, int flags )
@ -120,7 +150,7 @@ int GetStorageRequirements( int width, int height, int flags )
// compute the storage requirements
int blockcount = ( ( width + 3 )/4 ) * ( ( height + 3 )/4 );
int blocksize = ( ( flags & kDxt1 ) != 0 ) ? 8 : 16;
int blocksize = ( ( flags & ( kDxt1 | kBc4 ) ) != 0 ) ? 8 : 16;
return blockcount*blocksize;
}
@ -131,7 +161,7 @@ void CompressImage( u8 const* rgba, int width, int height, void* blocks, int fla
// initialise the block output
u8* targetBlock = reinterpret_cast< u8* >( blocks );
int bytesPerBlock = ( ( flags & kDxt1 ) != 0 ) ? 8 : 16;
int bytesPerBlock = ( ( flags & ( kDxt1 | kBc4 ) ) != 0 ) ? 8 : 16;
// loop over blocks
for( int y = 0; y < height; y += 4 )
@ -185,7 +215,7 @@ void DecompressImage( u8* rgba, int width, int height, void const* blocks, int f
// initialise the block input
u8 const* sourceBlock = reinterpret_cast< u8 const* >( blocks );
int bytesPerBlock = ( ( flags & kDxt1 ) != 0 ) ? 8 : 16;
int bytesPerBlock = ( ( flags & ( kDxt1 | kBc4 ) ) != 0 ) ? 8 : 16;
// loop over blocks
for( int y = 0; y < height; y += 4 )

6
3rdparty/libsquish/squish.h vendored
View file

@ -47,6 +47,12 @@ enum
//! Use DXT5 compression.
kDxt5 = ( 1 << 2 ),
//! Use BC4 compression.
kBc4 = ( 1 << 3 ),
//! Use BC5 compression.
kBc5 = ( 1 << 4 ),
//! Use a very slow but very high quality colour compressor.
kColourIterativeClusterFit = ( 1 << 8 ),

2
src/image.cpp
View file

@ -1620,6 +1620,7 @@ namespace bgfx
_imageContainer.m_hasAlpha = hasAlpha;
_imageContainer.m_cubeMap = cubeMap;
_imageContainer.m_ktx = false;
_imageContainer.m_ktxLE = false;
_imageContainer.m_srgb = srgb;
return TextureFormat::Unknown != format;
@ -1896,6 +1897,7 @@ namespace bgfx
_imageContainer.m_cubeMap = numFaces > 1;
_imageContainer.m_ktx = true;
_imageContainer.m_ktxLE = fromLittleEndian;
_imageContainer.m_srgb = false;
return TextureFormat::Unknown != format;
}

101
tools/texturec/texturec.cpp
View file

@ -40,6 +40,54 @@ namespace bgfx
::free(mem);
}
void imageEncodeFromRgba8(uint8_t* _dst, const uint8_t* _src, uint32_t _width, uint32_t _height, uint8_t _format)
{
TextureFormat::Enum format = TextureFormat::Enum(_format);
switch (format)
{
case TextureFormat::BC1:
case TextureFormat::BC2:
case TextureFormat::BC3:
case TextureFormat::BC4:
case TextureFormat::BC5:
squish::CompressImage(_src, _width, _height, _dst
, format == TextureFormat::BC1 ? squish::kDxt1
: format == TextureFormat::BC2 ? squish::kDxt3
: format == TextureFormat::BC3 ? squish::kDxt5
: format == TextureFormat::BC4 ? squish::kBc4
: squish::kBc5
);
break;
case TextureFormat::BC6H:
nvtt::compressBC6H(_src, _width, _height, 4, _dst);
break;
case TextureFormat::BC7:
nvtt::compressBC7(_src, _width, _height, 4, _dst);
break;
case TextureFormat::ETC1:
etc1_encode_image(_src, _width, _height, 4, _width*4, _dst);
break;
case TextureFormat::ETC2:
case TextureFormat::ETC2A:
case TextureFormat::ETC2A1:
case TextureFormat::PTC12:
case TextureFormat::PTC14:
case TextureFormat::PTC12A:
case TextureFormat::PTC14A:
case TextureFormat::PTC22:
case TextureFormat::PTC24:
break;
default:
break;
}
}
} // namespace bgfx
void help(const char* _error = NULL)
@ -110,6 +158,14 @@ int main(int _argc, const char* _argv[])
{
format = TextureFormat::BC3;
}
else if (0 == bx::stricmp(type, "bc4") )
{
format = TextureFormat::BC4;
}
else if (0 == bx::stricmp(type, "bc5") )
{
format = TextureFormat::BC5;
}
else if (0 == bx::stricmp(type, "etc1") )
{
format = TextureFormat::ETC1;
@ -134,6 +190,7 @@ int main(int _argc, const char* _argv[])
bool loaded = imageParse(imageContainer, mem->data, mem->size);
if (!loaded)
{
}
BX_UNUSED(mips);
@ -151,48 +208,8 @@ int main(int _argc, const char* _argv[])
output = (uint8_t*)BX_ALLOC(&allocator, imageGetSize(format, mip.m_width, mip.m_height) );
switch (format)
{
case TextureFormat::BC1:
case TextureFormat::BC2:
case TextureFormat::BC3:
squish::CompressImage(rgba, mip.m_width, mip.m_height, output
, format == TextureFormat::BC1 ? squish::kDxt1
: format == TextureFormat::BC2 ? squish::kDxt3
: squish::kDxt5
);
break;
case TextureFormat::BC4:
case TextureFormat::BC5:
break;
case TextureFormat::BC6H:
nvtt::compressBC6H(rgba, mip.m_width, mip.m_height, 4, output);
break;
case TextureFormat::BC7:
nvtt::compressBC7(rgba, mip.m_width, mip.m_height, 4, output);
break;
case TextureFormat::ETC1:
etc1_encode_image(rgba, mip.m_width, mip.m_height, 4, mip.m_width*4, output);
break;
case TextureFormat::ETC2:
case TextureFormat::ETC2A:
case TextureFormat::ETC2A1:
case TextureFormat::PTC12:
case TextureFormat::PTC14:
case TextureFormat::PTC12A:
case TextureFormat::PTC14A:
case TextureFormat::PTC22:
case TextureFormat::PTC24:
break;
default:
break;
}
imageContainer.m_format = format;
imageEncodeFromRgba8(output, rgba, mip.m_width, mip.m_height, format);
BX_FREE(&allocator, rgba);
}