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GitHub Repository: hrydgard/ppsspp
 Path: blob/master/Common/GPU/DataFormat.h
Views: 1401
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#pragma once

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#include <cstdint>

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#include <cstdlib>

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namespace Draw {

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enum class DataFormat : uint8_t {

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	UNDEFINED,

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	R8_UNORM,

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	R8G8_UNORM,

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	R8G8B8_UNORM,

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	R8G8B8A8_UNORM,

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	R8G8B8A8_UNORM_SRGB,

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	B8G8R8A8_UNORM,  // D3D style

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	B8G8R8A8_UNORM_SRGB,  // D3D style

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	R8G8B8A8_SNORM,

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	R8G8B8A8_UINT,

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	R8G8B8A8_SINT,

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	R4G4_UNORM_PACK8,

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	A4R4G4B4_UNORM_PACK16,  // A4 in the UPPER bit

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	B4G4R4A4_UNORM_PACK16,

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	R4G4B4A4_UNORM_PACK16,

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	R5G6B5_UNORM_PACK16,

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	B5G6R5_UNORM_PACK16,

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	R5G5B5A1_UNORM_PACK16, // A1 in the LOWER bit

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	B5G5R5A1_UNORM_PACK16, // A1 in the LOWER bit

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	A1R5G5B5_UNORM_PACK16, // A1 in the UPPER bit.

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	A1B5G5R5_UNORM_PACK16, // A1 in the UPPER bit. OpenGL-only.

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	R16_UNORM,

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	R16_FLOAT,

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	R16G16_FLOAT,

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	R16G16B16A16_FLOAT,

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	R32_FLOAT,

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	R32G32_FLOAT,

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	R32G32B32_FLOAT,

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	R32G32B32A32_FLOAT,

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	// Block compression formats.

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	// These are modern names for DXT and friends, now patent free.

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	// https://msdn.microsoft.com/en-us/library/bb694531.aspx

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	BC1_RGBA_UNORM_BLOCK,  // 64 bits per 4x4 block. Used by Basis, along with ETC2_R8G8B8_UNORM_BLOCK.

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	BC2_UNORM_BLOCK,  // 4-bit straight alpha + DXT1 color. 128 bits per block. Usually not worth using

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	BC3_UNORM_BLOCK,  // 3-bit alpha with 2 ref values (+ magic) + DXT1 color. 128 bits per block.

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	BC4_UNORM_BLOCK,  // 1-channel, same storage as BC3 alpha. 64 bits per block.

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	BC5_UNORM_BLOCK,  // 2-channel RG, each has same storage as BC3 alpha. 128 bits per block.

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	BC7_UNORM_BLOCK,  // Highly advanced RGBA, very expensive to compress, very good quality. 128 bits per block.

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	// Ericsson texture compression.

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	ETC2_R8G8B8_UNORM_BLOCK,  // Color-only, 64 bits per 4x4 block.

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	ETC2_R8G8B8A1_UNORM_BLOCK,  // Color + alpha, 128 bits per 4x4 block.

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	ETC2_R8G8B8A8_UNORM_BLOCK,  // Color + alpha, 128 bits per 4x4 block.

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	// This is the one ASTC format used by UASTC / basis Universal.

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	ASTC_4x4_UNORM_BLOCK,

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	S8,

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	D16,

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	D16_S8,

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	D24_S8,

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	D32F,

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	D32F_S8,

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};

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size_t DataFormatSizeInBytes(DataFormat fmt);

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bool DataFormatIsDepthStencil(DataFormat fmt);

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inline bool DataFormatIsColor(DataFormat fmt) {

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	return !DataFormatIsDepthStencil(fmt);

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}

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bool DataFormatIsBlockCompressed(DataFormat fmt, int *blockSize);

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// Limited format support for now.

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const char *DataFormatToString(DataFormat fmt);

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void ConvertFromRGBA8888(uint8_t *dst, const uint8_t *src, uint32_t dstStride, uint32_t srcStride, uint32_t width, uint32_t height, DataFormat format);

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void ConvertFromBGRA8888(uint8_t *dst, const uint8_t *src, uint32_t dstStride, uint32_t srcStride, uint32_t width, uint32_t height, DataFormat format);

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void ConvertToD32F(uint8_t *dst, const uint8_t *src, uint32_t dstStride, uint32_t srcStride, uint32_t width, uint32_t height, DataFormat format);

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void ConvertToD16(uint8_t *dst, const uint8_t *src, uint32_t dstStride, uint32_t srcStride, uint32_t width, uint32_t height, DataFormat format);

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}  // namespace

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