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Diffstat (limited to 'libs/preview_dds_native/src/ddsformat.h')
| -rw-r--r-- | libs/preview_dds_native/src/ddsformat.h | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/libs/preview_dds_native/src/ddsformat.h b/libs/preview_dds_native/src/ddsformat.h new file mode 100644 index 0000000..22d3565 --- /dev/null +++ b/libs/preview_dds_native/src/ddsformat.h @@ -0,0 +1,200 @@ +#ifndef DDSFORMAT_H +#define DDSFORMAT_H + +#include <cstdint> +#include <functional> +#include <vector> + +#include <QByteArray> + +// DDS file magic number +constexpr uint32_t DDS_MAGIC = 0x20534444; // "DDS " + +// DDS_PIXELFORMAT flags +constexpr uint32_t DDPF_ALPHAPIXELS = 0x1; +constexpr uint32_t DDPF_ALPHA = 0x2; +constexpr uint32_t DDPF_FOURCC = 0x4; +constexpr uint32_t DDPF_RGB = 0x40; +constexpr uint32_t DDPF_YUV = 0x200; +constexpr uint32_t DDPF_LUMINANCE = 0x20000; + +// DDS_HEADER flags +constexpr uint32_t DDSD_CAPS = 0x1; +constexpr uint32_t DDSD_HEIGHT = 0x2; +constexpr uint32_t DDSD_WIDTH = 0x4; +constexpr uint32_t DDSD_PITCH = 0x8; +constexpr uint32_t DDSD_PIXELFORMAT = 0x1000; +constexpr uint32_t DDSD_MIPMAPCOUNT = 0x20000; +constexpr uint32_t DDSD_LINEARSIZE = 0x80000; +constexpr uint32_t DDSD_DEPTH = 0x800000; + +// DDS_HEADER caps2 +constexpr uint32_t DDSCAPS2_CUBEMAP = 0x200; +constexpr uint32_t DDSCAPS2_CUBEMAP_POSITIVEX = 0x400; +constexpr uint32_t DDSCAPS2_CUBEMAP_NEGATIVEX = 0x800; +constexpr uint32_t DDSCAPS2_CUBEMAP_POSITIVEY = 0x1000; +constexpr uint32_t DDSCAPS2_CUBEMAP_NEGATIVEY = 0x2000; +constexpr uint32_t DDSCAPS2_CUBEMAP_POSITIVEZ = 0x4000; +constexpr uint32_t DDSCAPS2_CUBEMAP_NEGATIVEZ = 0x8000; +constexpr uint32_t DDSCAPS2_VOLUME = 0x200000; + +constexpr uint32_t DDSCAPS2_CUBEMAP_ALLFACES = + DDSCAPS2_CUBEMAP_POSITIVEX | DDSCAPS2_CUBEMAP_NEGATIVEX | + DDSCAPS2_CUBEMAP_POSITIVEY | DDSCAPS2_CUBEMAP_NEGATIVEY | + DDSCAPS2_CUBEMAP_POSITIVEZ | DDSCAPS2_CUBEMAP_NEGATIVEZ; + +// DXGI formats (subset covering common DDS textures) +enum class DXGIFormat : uint32_t { + UNKNOWN = 0, + R32G32B32A32_FLOAT = 2, + R32G32B32A32_UINT = 3, + R32G32B32A32_SINT = 4, + R32G32B32_FLOAT = 6, + R32G32B32_UINT = 7, + R32G32B32_SINT = 8, + R16G16B16A16_FLOAT = 10, + R16G16B16A16_UNORM = 11, + R16G16B16A16_UINT = 12, + R16G16B16A16_SNORM = 13, + R16G16B16A16_SINT = 14, + R32G32_FLOAT = 16, + R32G32_UINT = 17, + R32G32_SINT = 18, + R10G10B10A2_UNORM = 24, + R10G10B10A2_UINT = 25, + R11G11B10_FLOAT = 26, + R8G8B8A8_UNORM = 28, + R8G8B8A8_UNORM_SRGB = 29, + R8G8B8A8_UINT = 30, + R8G8B8A8_SNORM = 31, + R8G8B8A8_SINT = 32, + R16G16_FLOAT = 34, + R16G16_UNORM = 35, + R16G16_UINT = 36, + R16G16_SNORM = 37, + R16G16_SINT = 38, + R32_FLOAT = 41, + R32_UINT = 42, + R32_SINT = 43, + R8G8_UNORM = 49, + R8G8_UINT = 50, + R8G8_SNORM = 51, + R8G8_SINT = 52, + R16_FLOAT = 54, + R16_UNORM = 56, + R16_UINT = 57, + R16_SNORM = 58, + R16_SINT = 59, + R8_UNORM = 61, + R8_UINT = 62, + R8_SNORM = 63, + R8_SINT = 64, + A8_UNORM = 65, + BC1_UNORM = 71, + BC1_UNORM_SRGB = 72, + BC2_UNORM = 74, + BC2_UNORM_SRGB = 75, + BC3_UNORM = 77, + BC3_UNORM_SRGB = 78, + BC4_UNORM = 80, + BC4_SNORM = 81, + BC5_UNORM = 83, + BC5_SNORM = 84, + B5G6R5_UNORM = 85, + B5G5R5A1_UNORM = 86, + B8G8R8A8_UNORM = 87, + B8G8R8X8_UNORM = 88, + B8G8R8A8_UNORM_SRGB = 91, + B8G8R8X8_UNORM_SRGB = 93, + BC6H_UF16 = 95, + BC6H_SF16 = 96, + BC7_UNORM = 98, + BC7_UNORM_SRGB = 99, + B4G4R4A4_UNORM = 115, +}; + +// D3D10 resource dimension +enum class D3D10ResourceDimension : uint32_t { + Unknown = 0, + Buffer = 1, + Texture1D = 2, + Texture2D = 3, + Texture3D = 4, +}; + +#pragma pack(push, 1) + +struct DDSPixelFormat { + uint32_t dwSize; + uint32_t dwFlags; + uint32_t dwFourCC; + uint32_t dwRGBBitCount; + uint32_t dwRBitMask; + uint32_t dwGBitMask; + uint32_t dwBBitMask; + uint32_t dwABitMask; +}; + +struct DDSHeader { + uint32_t dwSize; + uint32_t dwFlags; + uint32_t dwHeight; + uint32_t dwWidth; + uint32_t dwPitchOrLinearSize; + uint32_t dwDepth; + uint32_t dwMipMapCount; + uint32_t dwReserved1[11]; + DDSPixelFormat ddspf; + uint32_t dwCaps; + uint32_t dwCaps2; + uint32_t dwCaps3; + uint32_t dwCaps4; + uint32_t dwReserved2; +}; + +struct DDSHeaderDXT10 { + DXGIFormat dxgiFormat; + D3D10ResourceDimension resourceDimension; + uint32_t miscFlag; + uint32_t arraySize; + uint32_t miscFlags2; +}; + +#pragma pack(pop) + +// Sampler type for shader selection +enum class SamplerType { Float, UInt, SInt }; + +// OpenGL format info +struct GLFormatInfo { + bool valid = false; + bool compressed = false; + uint32_t internalFormat = 0; + uint32_t format = 0; // only for uncompressed + uint32_t type = 0; // only for uncompressed + SamplerType sampler = SamplerType::Float; + // Optional converter for non-standard bitmask formats + std::function<QByteArray(const QByteArray&, int, int)> converter; +}; + +// Inline helper: make a FourCC from 4 chars +constexpr uint32_t makeFourCC(char a, char b, char c, char d) +{ + return static_cast<uint32_t>(a) | (static_cast<uint32_t>(b) << 8) | + (static_cast<uint32_t>(c) << 16) | (static_cast<uint32_t>(d) << 24); +} + +// Convert a FourCC code to DXGI format +DXGIFormat fourCCToDXGI(uint32_t fourCC); + +// Resolve the OpenGL format from a DDS pixel format + optional DXT10 header +GLFormatInfo getGLFormat(const DDSPixelFormat& pf, const DDSHeaderDXT10* dxt10); + +// Calculate mip level data size in bytes +uint32_t mipDataSize(DXGIFormat fmt, const DDSPixelFormat& pf, + uint32_t width, uint32_t height); + +// Get a human-readable format description +QString formatDescription(const DDSPixelFormat& pf, const DDSHeaderDXT10* dxt10); + +#endif // DDSFORMAT_H |