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Adds BytesPerBlock helper (#516)

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Chuck Walbourn 2024-09-19 18:08:58 -07:00 committed by GitHub
parent 73aa2f3c34
commit 25ee5b4f91
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2 changed files with 41 additions and 0 deletions
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2
DirectXTex/DirectXTex.h
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@ -72,6 +72,8 @@ namespace DirectX
size_t __cdecl BitsPerColor(_In_ DXGI_FORMAT fmt) noexcept; size_t __cdecl BitsPerColor(_In_ DXGI_FORMAT fmt) noexcept;
size_t __cdecl BytesPerBlock(_In_ DXGI_FORMAT fmt) noexcept;
enum FORMAT_TYPE enum FORMAT_TYPE
{ {
FORMAT_TYPE_TYPELESS, FORMAT_TYPE_TYPELESS,

39
DirectXTex/DirectXTexUtil.cpp
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@ -920,6 +920,45 @@ size_t DirectX::BitsPerColor(DXGI_FORMAT fmt) noexcept
} }
//-------------------------------------------------------------------------------------
// Returns bytes per block for a given DXGI BC format, or 0 on failure
//-------------------------------------------------------------------------------------
_Use_decl_annotations_
size_t DirectX::BytesPerBlock(DXGI_FORMAT fmt) noexcept
{
switch (fmt)
{
case DXGI_FORMAT_BC1_TYPELESS:
case DXGI_FORMAT_BC1_UNORM:
case DXGI_FORMAT_BC1_UNORM_SRGB:
case DXGI_FORMAT_BC4_TYPELESS:
case DXGI_FORMAT_BC4_UNORM:
case DXGI_FORMAT_BC4_SNORM:
return 8;
case DXGI_FORMAT_BC2_TYPELESS:
case DXGI_FORMAT_BC2_UNORM:
case DXGI_FORMAT_BC2_UNORM_SRGB:
case DXGI_FORMAT_BC3_TYPELESS:
case DXGI_FORMAT_BC3_UNORM:
case DXGI_FORMAT_BC3_UNORM_SRGB:
case DXGI_FORMAT_BC5_TYPELESS:
case DXGI_FORMAT_BC5_UNORM:
case DXGI_FORMAT_BC5_SNORM:
case DXGI_FORMAT_BC6H_TYPELESS:
case DXGI_FORMAT_BC6H_UF16:
case DXGI_FORMAT_BC6H_SF16:
case DXGI_FORMAT_BC7_TYPELESS:
case DXGI_FORMAT_BC7_UNORM:
case DXGI_FORMAT_BC7_UNORM_SRGB:
return 16;
default:
return 0;
}
}
//------------------------------------------------------------------------------------- //-------------------------------------------------------------------------------------
// Computes the image row pitch in bytes, and the slice ptich (size in bytes of the image) // Computes the image row pitch in bytes, and the slice ptich (size in bytes of the image)
// based on DXGI format, width, and height // based on DXGI format, width, and height