forked from dolphin-emu/dolphin
125 lines
4.4 KiB
C
125 lines
4.4 KiB
C
// Copyright 2008 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#pragma once
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#include <tuple>
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#include "Common/CommonTypes.h"
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enum
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{
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TMEM_SIZE = 1024 * 1024,
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TMEM_LINE_SIZE = 32,
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};
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alignas(16) extern u8 texMem[TMEM_SIZE];
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enum class TextureFormat
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{
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// These values represent texture format in GX registers.
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I4 = 0x0,
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I8 = 0x1,
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IA4 = 0x2,
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IA8 = 0x3,
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RGB565 = 0x4,
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RGB5A3 = 0x5,
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RGBA8 = 0x6,
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C4 = 0x8,
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C8 = 0x9,
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C14X2 = 0xA,
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CMPR = 0xE,
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// Special texture format used to represent YUVY xfb copies.
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// They aren't really textures, but they share so much hardware and usecases that it makes sense
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// to emulate them as part of texture cache.
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XFB = 0xF,
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};
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static inline bool IsColorIndexed(TextureFormat format)
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{
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return format == TextureFormat::C4 || format == TextureFormat::C8 ||
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format == TextureFormat::C14X2;
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}
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// The EFB Copy pipeline looks like:
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//
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// 1. Read EFB -> 2. Select color/depth -> 3. Downscale (optional)
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// -> 4. YUV conversion (optional) -> 5. Encode Tiles -> 6. Write RAM
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//
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// The "Encode Tiles" stage receives RGBA8 texels from previous stages and encodes them to various
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// formats. EFBCopyFormat is the tile encoder mode. Note that the tile encoder does not care about
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// color vs. depth or intensity formats - it only sees RGBA8 texels.
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enum class EFBCopyFormat
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{
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// These values represent EFB copy format in GX registers.
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// Most (but not all) of these values correspond to values of TextureFormat.
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R4 = 0x0, // R4, I4, Z4
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// FIXME: Does 0x1 (Z8) have identical results to 0x8 (Z8H)?
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// Is either or both of 0x1 and 0x8 used in games?
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R8_0x1 = 0x1, // R8, I8, Z8H (?)
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RA4 = 0x2, // RA4, IA4
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// FIXME: Earlier versions of this file named the value 0x3 "GX_TF_Z16", which does not reflect
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// the results one would expect when copying from the depth buffer with this format.
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// For reference: When copying from the depth buffer, R should receive the top 8 bits of
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// the Z value, and A should be either 0xFF or 0 (please investigate).
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// Please test original hardware and make sure dolphin-emu implements this format
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// correctly.
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RA8 = 0x3, // RA8, IA8, (FIXME: Z16 too?)
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RGB565 = 0x4,
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RGB5A3 = 0x5,
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RGBA8 = 0x6, // RGBA8, Z24
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A8 = 0x7,
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R8 = 0x8, // R8, I8, Z8H
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G8 = 0x9, // G8, Z8M
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B8 = 0xA, // B8, Z8L
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RG8 = 0xB, // RG8, Z16R (Note: G and R are reversed)
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GB8 = 0xC, // GB8, Z16L
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// Special texture format used to represent YUVY xfb copies.
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// They aren't really textures, but they share so much hardware and usecases that it makes sense
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// to emulate them as part of texture cache.
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XFB = 0xF,
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};
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enum class TLUTFormat
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{
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// These values represent TLUT format in GX registers.
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IA8 = 0x0,
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RGB565 = 0x1,
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RGB5A3 = 0x2,
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};
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static inline bool IsValidTLUTFormat(TLUTFormat tlutfmt)
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{
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return tlutfmt == TLUTFormat::IA8 || tlutfmt == TLUTFormat::RGB565 ||
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tlutfmt == TLUTFormat::RGB5A3;
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}
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int TexDecoder_GetTexelSizeInNibbles(TextureFormat format);
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int TexDecoder_GetTextureSizeInBytes(int width, int height, TextureFormat format);
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int TexDecoder_GetBlockWidthInTexels(TextureFormat format);
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int TexDecoder_GetBlockHeightInTexels(TextureFormat format);
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int TexDecoder_GetEFBCopyBlockWidthInTexels(EFBCopyFormat format);
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int TexDecoder_GetEFBCopyBlockHeightInTexels(EFBCopyFormat format);
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int TexDecoder_GetPaletteSize(TextureFormat fmt);
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TextureFormat TexDecoder_GetEFBCopyBaseFormat(EFBCopyFormat format);
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void TexDecoder_Decode(u8* dst, const u8* src, int width, int height, TextureFormat texformat,
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const u8* tlut, TLUTFormat tlutfmt);
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void TexDecoder_DecodeRGBA8FromTmem(u8* dst, const u8* src_ar, const u8* src_gb, int width,
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int height);
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void TexDecoder_DecodeTexel(u8* dst, const u8* src, int s, int t, int imageWidth,
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TextureFormat texformat, const u8* tlut, TLUTFormat tlutfmt);
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void TexDecoder_DecodeTexelRGBA8FromTmem(u8* dst, const u8* src_ar, const u8* src_gb, int s, int t,
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int imageWidth);
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void TexDecoder_SetTexFmtOverlayOptions(bool enable, bool center);
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/* Internal method, implemented by TextureDecoder_Generic and TextureDecoder_x64. */
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void _TexDecoder_DecodeImpl(u32* dst, const u8* src, int width, int height, TextureFormat texformat,
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const u8* tlut, TLUTFormat tlutfmt);
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