size_t GetCompressedByteSize(GLsizei w, GLsizei h, GLsizei d, GLenum internalformat, int mip)
{
if(!IsCompressedFormat(internalformat))
{
RDCERR("Not compressed format");
return GetByteSize(w, h, d, GetBaseFormat(internalformat), GetDataType(internalformat));
}
switch(internalformat)
{
// BC1
case eGL_COMPRESSED_RGB_S3TC_DXT1_EXT:
case eGL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
case eGL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
case eGL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
return (AlignUp4(w) * AlignUp4(h) * d) / 2;
// BC2
case eGL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
case eGL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
return (AlignUp4(w) * AlignUp4(h) * d);
// BC3
case eGL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
case eGL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
return (AlignUp4(w) * AlignUp4(h) * d);
// BC4
case eGL_COMPRESSED_RED_RGTC1:
case eGL_COMPRESSED_SIGNED_RED_RGTC1:
return (AlignUp4(w) * AlignUp4(h) * d) / 2;
// BC5
case eGL_COMPRESSED_RG_RGTC2:
case eGL_COMPRESSED_SIGNED_RG_RGTC2:
return (AlignUp4(w) * AlignUp4(h) * d);
// BC6
case eGL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT_ARB:
case eGL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT_ARB:
return (AlignUp4(w) * AlignUp4(h) * d);
// BC7
case eGL_COMPRESSED_RGBA_BPTC_UNORM_ARB:
case eGL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM_ARB:
return (AlignUp4(w) * AlignUp4(h) * d);
// ETC2
case eGL_COMPRESSED_RGB8_ETC2:
case eGL_COMPRESSED_SRGB8_ETC2:
case eGL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2:
case eGL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
return (AlignUp4(w) * AlignUp4(h) * d) / 2;
// EAC
case eGL_COMPRESSED_RGBA8_ETC2_EAC:
case eGL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
return (AlignUp4(w) * AlignUp4(h) * d);
case eGL_COMPRESSED_R11_EAC:
case eGL_COMPRESSED_SIGNED_R11_EAC:
return (AlignUp4(w) * AlignUp4(h) * d) / 2;
case eGL_COMPRESSED_RG11_EAC:
case eGL_COMPRESSED_SIGNED_RG11_EAC:
return (AlignUp4(w) * AlignUp4(h) * d);
default:
break;
}
RDCERR("Unrecognised compressed format");
return GetByteSize(w, h, d, GetBaseFormat(internalformat), GetDataType(internalformat));
}
size_t GetCompressedByteSize(GLsizei w, GLsizei h, GLsizei d, GLenum internalformat, int mip)
{
if(!IsCompressedFormat(internalformat))
{
RDCERR("Not compressed format %s", ToStr::Get(internalformat).c_str());
return GetByteSize(w, h, d, GetBaseFormat(internalformat), GetDataType(internalformat));
}
uint32_t astc[2] = {0, 0};
switch(internalformat)
{
// BC1
case eGL_COMPRESSED_RGB_S3TC_DXT1_EXT:
case eGL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
case eGL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
case eGL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
return (AlignUp4(w) * AlignUp4(h) * d) / 2;
// BC2
case eGL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
case eGL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
return (AlignUp4(w) * AlignUp4(h) * d);
// BC3
case eGL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
case eGL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
return (AlignUp4(w) * AlignUp4(h) * d);
// BC4
case eGL_COMPRESSED_RED_RGTC1:
case eGL_COMPRESSED_SIGNED_RED_RGTC1:
return (AlignUp4(w) * AlignUp4(h) * d) / 2;
// BC5
case eGL_COMPRESSED_RG_RGTC2:
case eGL_COMPRESSED_SIGNED_RG_RGTC2:
return (AlignUp4(w) * AlignUp4(h) * d);
// BC6
case eGL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT_ARB:
case eGL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT_ARB:
return (AlignUp4(w) * AlignUp4(h) * d);
// BC7
case eGL_COMPRESSED_RGBA_BPTC_UNORM_ARB:
case eGL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM_ARB:
return (AlignUp4(w) * AlignUp4(h) * d);
// ETC2
case eGL_COMPRESSED_RGB8_ETC2:
case eGL_COMPRESSED_SRGB8_ETC2:
case eGL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2:
case eGL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
return (AlignUp4(w) * AlignUp4(h) * d) / 2;
// EAC
case eGL_COMPRESSED_RGBA8_ETC2_EAC:
case eGL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC: return (AlignUp4(w) * AlignUp4(h) * d);
case eGL_COMPRESSED_R11_EAC:
case eGL_COMPRESSED_SIGNED_R11_EAC: return (AlignUp4(w) * AlignUp4(h) * d) / 2;
case eGL_COMPRESSED_RG11_EAC:
case eGL_COMPRESSED_SIGNED_RG11_EAC: return (AlignUp4(w) * AlignUp4(h) * d);
case GL_COMPRESSED_RGBA_ASTC_4x4_KHR:
astc[0] = 4;
astc[1] = 4;
break;
case GL_COMPRESSED_RGBA_ASTC_5x4_KHR:
astc[0] = 5;
astc[1] = 4;
break;
case GL_COMPRESSED_RGBA_ASTC_5x5_KHR:
astc[0] = 5;
astc[1] = 5;
break;
case GL_COMPRESSED_RGBA_ASTC_6x5_KHR:
astc[0] = 6;
astc[1] = 5;
break;
case GL_COMPRESSED_RGBA_ASTC_6x6_KHR:
astc[0] = 6;
astc[1] = 6;
break;
case GL_COMPRESSED_RGBA_ASTC_8x5_KHR:
astc[0] = 8;
astc[1] = 5;
break;
case GL_COMPRESSED_RGBA_ASTC_8x6_KHR:
astc[0] = 8;
astc[1] = 6;
break;
case GL_COMPRESSED_RGBA_ASTC_8x8_KHR:
astc[0] = 8;
astc[1] = 8;
break;
case GL_COMPRESSED_RGBA_ASTC_10x5_KHR:
astc[0] = 10;
astc[1] = 5;
break;
case GL_COMPRESSED_RGBA_ASTC_10x6_KHR:
astc[0] = 10;
astc[1] = 6;
break;
case GL_COMPRESSED_RGBA_ASTC_10x8_KHR:
astc[0] = 10;
astc[1] = 8;
break;
case GL_COMPRESSED_RGBA_ASTC_10x10_KHR:
astc[0] = 10;
astc[1] = 10;
break;
case GL_COMPRESSED_RGBA_ASTC_12x10_KHR:
astc[0] = 12;
astc[1] = 10;
break;
case GL_COMPRESSED_RGBA_ASTC_12x12_KHR:
astc[0] = 12;
astc[1] = 12;
break;
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
astc[0] = 4;
astc[1] = 4;
break;
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
astc[0] = 5;
astc[1] = 4;
break;
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
astc[0] = 5;
astc[1] = 5;
break;
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
astc[0] = 6;
astc[1] = 5;
break;
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
astc[0] = 6;
astc[1] = 6;
break;
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
astc[0] = 8;
astc[1] = 5;
break;
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
astc[0] = 8;
astc[1] = 6;
break;
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
astc[0] = 8;
astc[1] = 8;
break;
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
astc[0] = 10;
astc[1] = 5;
break;
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
astc[0] = 10;
astc[1] = 6;
break;
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
astc[0] = 10;
astc[1] = 8;
break;
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
astc[0] = 10;
astc[1] = 10;
break;
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
astc[0] = 12;
astc[1] = 10;
break;
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
astc[0] = 12;
astc[1] = 12;
break;
default: break;
}
if(astc[0] > 0 && astc[1] > 0)
{
uint32_t blocks[2] = {(w / astc[0]), (h / astc[1])};
// how many blocks are needed - including any extra partial blocks
blocks[0] += (w % astc[0]) ? 1 : 0;
blocks[1] += (h % astc[1]) ? 1 : 0;
// ASTC blocks are all 128 bits each
return blocks[0] * blocks[1] * 16 * d;
}
RDCERR("Unrecognised compressed format %s", ToStr::Get(internalformat).c_str());
return GetByteSize(w, h, d, GetBaseFormat(internalformat), GetDataType(internalformat));
}
