87b23fdb10
* Replace the various image interfaces with spng which is very lightweight and fast. Also add a dds header which will be useful when support for that format is implemented
112 lines
4.1 KiB
C++
112 lines
4.1 KiB
C++
//--------------------------------------------------------------------------------------
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// DDS.h
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//
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// This header defines constants and structures that are useful when parsing
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// DDS files. DDS files were originally designed to use several structures
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// and constants that are native to DirectDraw and are defined in ddraw.h,
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// such as DDSURFACEDESC2 and DDSCAPS2. This file defines similar
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// (compatible) constants and structures so that one can use DDS files
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// without needing to include ddraw.h.
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//
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// Copyright (c) Microsoft Corporation.
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// Licensed under the MIT License.
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//
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// http://go.microsoft.com/fwlink/?LinkId=248926
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// http://go.microsoft.com/fwlink/?LinkId=248929
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// http://go.microsoft.com/fwlink/?LinkID=615561
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//--------------------------------------------------------------------------------------
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#pragma once
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#include <cstdint>
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namespace Common::DirectX {
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#pragma pack(push, 1)
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const uint32_t DDS_MAGIC = 0x20534444; // "DDS "
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struct DDS_PIXELFORMAT {
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uint32_t dwSize;
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uint32_t dwFlags;
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uint32_t dwFourCC;
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uint32_t dwRGBBitCount;
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uint32_t dwRBitMask;
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uint32_t dwGBitMask;
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uint32_t dwBBitMask;
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uint32_t dwABitMask;
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};
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#define DDS_FOURCC 0x00000004 // DDPF_FOURCC
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#define DDS_RGB 0x00000040 // DDPF_RGB
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#define DDS_RGBA 0x00000041 // DDPF_RGB | DDPF_ALPHAPIXELS
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#define DDS_LUMINANCE 0x00020000 // DDPF_LUMINANCE
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#define DDS_LUMINANCEA 0x00020001 // DDPF_LUMINANCE | DDPF_ALPHAPIXELS
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#define DDS_ALPHA 0x00000002 // DDPF_ALPHA
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#define DDS_PAL8 0x00000020 // DDPF_PALETTEINDEXED8
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#define DDS_PAL8A 0x00000021 // DDPF_PALETTEINDEXED8 | DDPF_ALPHAPIXELS
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#define DDS_BUMPDUDV 0x00080000 // DDPF_BUMPDUDV
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#ifndef MAKEFOURCC
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#define MAKEFOURCC(ch0, ch1, ch2, ch3) \
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((uint32_t)(uint8_t)(ch0) | ((uint32_t)(uint8_t)(ch1) << 8) | \
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((uint32_t)(uint8_t)(ch2) << 16) | ((uint32_t)(uint8_t)(ch3) << 24))
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#endif /* defined(MAKEFOURCC) */
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#define DDS_HEADER_FLAGS_TEXTURE \
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0x00001007 // DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH | DDSD_PIXELFORMAT
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#define DDS_HEADER_FLAGS_MIPMAP 0x00020000 // DDSD_MIPMAPCOUNT
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#define DDS_HEADER_FLAGS_VOLUME 0x00800000 // DDSD_DEPTH
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#define DDS_HEADER_FLAGS_PITCH 0x00000008 // DDSD_PITCH
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#define DDS_HEADER_FLAGS_LINEARSIZE 0x00080000 // DDSD_LINEARSIZE
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// Subset here matches D3D10_RESOURCE_DIMENSION and D3D11_RESOURCE_DIMENSION
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enum DDS_RESOURCE_DIMENSION {
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DDS_DIMENSION_TEXTURE1D = 2,
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DDS_DIMENSION_TEXTURE2D = 3,
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DDS_DIMENSION_TEXTURE3D = 4,
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};
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struct DDS_HEADER {
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uint32_t dwSize;
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uint32_t dwFlags;
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uint32_t dwHeight;
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uint32_t dwWidth;
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uint32_t dwPitchOrLinearSize;
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uint32_t dwDepth; // only if DDS_HEADER_FLAGS_VOLUME is set in dwFlags
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uint32_t dwMipMapCount;
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uint32_t dwReserved1[11];
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DDS_PIXELFORMAT ddspf;
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uint32_t dwCaps;
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uint32_t dwCaps2;
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uint32_t dwCaps3;
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uint32_t dwCaps4;
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uint32_t dwReserved2;
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};
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struct DDS_HEADER_DXT10 {
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uint32_t dxgiFormat;
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uint32_t resourceDimension;
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uint32_t miscFlag; // see DDS_RESOURCE_MISC_FLAG
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uint32_t arraySize;
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uint32_t miscFlags2; // see DDS_MISC_FLAGS2
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};
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#pragma pack(pop)
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static_assert(sizeof(DDS_HEADER) == 124, "DDS Header size mismatch");
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static_assert(sizeof(DDS_HEADER_DXT10) == 20, "DDS DX10 Extended Header size mismatch");
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constexpr DDS_PIXELFORMAT DDSPF_A8R8G8B8 = {
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sizeof(DDS_PIXELFORMAT), DDS_RGBA, 0, 32, 0x00ff0000, 0x0000ff00, 0x000000ff, 0xff000000};
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constexpr DDS_PIXELFORMAT DDSPF_X8R8G8B8 = {
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sizeof(DDS_PIXELFORMAT), DDS_RGB, 0, 32, 0x00ff0000, 0x0000ff00, 0x000000ff, 0x00000000};
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constexpr DDS_PIXELFORMAT DDSPF_A8B8G8R8 = {
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sizeof(DDS_PIXELFORMAT), DDS_RGBA, 0, 32, 0x000000ff, 0x0000ff00, 0x00ff0000, 0xff000000};
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constexpr DDS_PIXELFORMAT DDSPF_X8B8G8R8 = {
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sizeof(DDS_PIXELFORMAT), DDS_RGB, 0, 32, 0x000000ff, 0x0000ff00, 0x00ff0000, 0x00000000};
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constexpr DDS_PIXELFORMAT DDSPF_R8G8B8 = {
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sizeof(DDS_PIXELFORMAT), DDS_RGB, 0, 24, 0x00ff0000, 0x0000ff00, 0x000000ff, 0x00000000};
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} // namespace Common::DirectX
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