video_core/compatible_formats: Table to test if two formats are legal to view or copy
Add a flat table to test if it's legal to create a texture view between two formats or copy betweem them. This table is based on ARB_copy_image and ARB_texture_view. Copies are more permissive than views.
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src/video_core
@ -3,6 +3,8 @@ add_library(video_core STATIC
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buffer_cache/buffer_cache.h
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buffer_cache/map_interval.cpp
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buffer_cache/map_interval.h
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compatible_formats.cpp
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compatible_formats.h
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dirty_flags.cpp
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dirty_flags.h
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dma_pusher.cpp
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162
src/video_core/compatible_formats.cpp
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162
src/video_core/compatible_formats.cpp
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// Copyright 2020 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <array>
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#include <bitset>
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#include <cstddef>
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#include "video_core/compatible_formats.h"
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#include "video_core/surface.h"
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namespace VideoCore::Surface {
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namespace {
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// Compatibility table taken from Table 3.X.2 in:
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// https://www.khronos.org/registry/OpenGL/extensions/ARB/ARB_texture_view.txt
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constexpr std::array VIEW_CLASS_128_BITS = {
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PixelFormat::RGBA32F,
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PixelFormat::RGBA32UI,
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};
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// Missing formats:
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// PixelFormat::RGBA32I
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constexpr std::array VIEW_CLASS_96_BITS = {
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PixelFormat::RGB32F,
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};
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// Missing formats:
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// PixelFormat::RGB32UI,
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// PixelFormat::RGB32I,
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constexpr std::array VIEW_CLASS_64_BITS = {
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PixelFormat::RGBA16F, PixelFormat::RG32F, PixelFormat::RGBA16UI, PixelFormat::RG32UI,
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PixelFormat::RGBA16U, PixelFormat::RGBA16F, PixelFormat::RGBA16S,
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};
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// Missing formats:
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// PixelFormat::RGBA16I
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// PixelFormat::RG32I
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// TODO: How should we handle 48 bits?
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constexpr std::array VIEW_CLASS_32_BITS = {
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PixelFormat::RG16F, PixelFormat::R11FG11FB10F, PixelFormat::R32F,
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PixelFormat::A2B10G10R10U, PixelFormat::RG16UI, PixelFormat::R32UI,
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PixelFormat::RG16I, PixelFormat::R32I, PixelFormat::ABGR8U,
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PixelFormat::RG16, PixelFormat::ABGR8S, PixelFormat::RG16S,
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PixelFormat::RGBA8_SRGB, PixelFormat::E5B9G9R9F, PixelFormat::BGRA8,
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PixelFormat::BGRA8_SRGB,
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};
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// Missing formats:
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// PixelFormat::RGBA8UI
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// PixelFormat::RGBA8I
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// PixelFormat::RGB10_A2_UI
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// TODO: How should we handle 24 bits?
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constexpr std::array VIEW_CLASS_16_BITS = {
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PixelFormat::R16F, PixelFormat::RG8UI, PixelFormat::R16UI, PixelFormat::R16I,
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PixelFormat::RG8U, PixelFormat::R16U, PixelFormat::RG8S, PixelFormat::R16S,
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};
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// Missing formats:
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// PixelFormat::RG8I
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constexpr std::array VIEW_CLASS_8_BITS = {
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PixelFormat::R8UI,
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PixelFormat::R8U,
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};
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// Missing formats:
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// PixelFormat::R8I
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// PixelFormat::R8S
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constexpr std::array VIEW_CLASS_RGTC1_RED = {
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PixelFormat::DXN1,
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};
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// Missing formats:
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// COMPRESSED_SIGNED_RED_RGTC1
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constexpr std::array VIEW_CLASS_RGTC2_RG = {
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PixelFormat::DXN2UNORM,
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PixelFormat::DXN2SNORM,
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};
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constexpr std::array VIEW_CLASS_BPTC_UNORM = {
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PixelFormat::BC7U,
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PixelFormat::BC7U_SRGB,
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};
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constexpr std::array VIEW_CLASS_BPTC_FLOAT = {
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PixelFormat::BC6H_SF16,
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PixelFormat::BC6H_UF16,
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};
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// Compatibility table taken from Table 4.X.1 in:
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// https://www.khronos.org/registry/OpenGL/extensions/ARB/ARB_copy_image.txt
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constexpr std::array COPY_CLASS_128_BITS = {
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PixelFormat::RGBA32UI, PixelFormat::RGBA32F, PixelFormat::DXT23,
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PixelFormat::DXT23_SRGB, PixelFormat::DXT45, PixelFormat::DXT45_SRGB,
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PixelFormat::DXN2SNORM, PixelFormat::BC7U, PixelFormat::BC7U_SRGB,
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PixelFormat::BC6H_SF16, PixelFormat::BC6H_UF16,
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};
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// Missing formats:
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// PixelFormat::RGBA32I
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// COMPRESSED_RG_RGTC2
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constexpr std::array COPY_CLASS_64_BITS = {
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PixelFormat::RGBA16F, PixelFormat::RG32F, PixelFormat::RGBA16UI, PixelFormat::RG32UI,
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PixelFormat::RGBA16U, PixelFormat::RGBA16S, PixelFormat::DXT1_SRGB, PixelFormat::DXT1,
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};
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// Missing formats:
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// PixelFormat::RGBA16I
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// PixelFormat::RG32I,
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// COMPRESSED_RGB_S3TC_DXT1_EXT
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// COMPRESSED_SRGB_S3TC_DXT1_EXT
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// COMPRESSED_RGBA_S3TC_DXT1_EXT
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// COMPRESSED_SIGNED_RED_RGTC1
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void Enable(FormatCompatibility::Table& compatiblity, size_t format_a, size_t format_b) {
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compatiblity[format_a][format_b] = true;
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compatiblity[format_b][format_a] = true;
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}
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void Enable(FormatCompatibility::Table& compatibility, PixelFormat format_a, PixelFormat format_b) {
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Enable(compatibility, static_cast<size_t>(format_a), static_cast<size_t>(format_b));
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}
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template <typename Range>
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void EnableRange(FormatCompatibility::Table& compatibility, const Range& range) {
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for (auto it_a = range.begin(); it_a != range.end(); ++it_a) {
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for (auto it_b = it_a; it_b != range.end(); ++it_b) {
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Enable(*it_a, *it_b);
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}
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}
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}
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} // Anonymous namespace
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FormatCompatibility::FormatCompatibility() {
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for (size_t i = 0; i < MaxPixelFormat; ++i) {
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// Identity is allowed
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Enable(view, i, i);
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}
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EnableRange(view, VIEW_CLASS_128_BITS);
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EnableRange(view, VIEW_CLASS_96_BITS);
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EnableRange(view, VIEW_CLASS_64_BITS);
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EnableRange(view, VIEW_CLASS_32_BITS);
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EnableRange(view, VIEW_CLASS_16_BITS);
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EnableRange(view, VIEW_CLASS_8_BITS);
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EnableRange(view, VIEW_CLASS_RGTC1_RED);
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EnableRange(view, VIEW_CLASS_RGTC2_RG);
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EnableRange(view, VIEW_CLASS_BPTC_UNORM);
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EnableRange(view, VIEW_CLASS_BPTC_FLOAT);
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copy = view;
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EnableRange(copy, COPY_CLASS_128_BITS);
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EnableRange(copy, COPY_CLASS_64_BITS);
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}
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} // namespace VideoCore::Surface
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src/video_core/compatible_formats.h
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32
src/video_core/compatible_formats.h
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@ -0,0 +1,32 @@
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// Copyright 2020 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <array>
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#include <bitset>
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#include <cstddef>
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#include "video_core/surface.h"
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namespace VideoCore::Surface {
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class FormatCompatibility {
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public:
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using Table = std::array<std::bitset<MaxPixelFormat>, MaxPixelFormat>;
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explicit FormatCompatibility();
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bool TestView(PixelFormat format_a, PixelFormat format_b) const noexcept {
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return view[static_cast<size_t>(format_a)][static_cast<size_t>(format_b)];
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}
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bool TestCopy(PixelFormat format_a, PixelFormat format_b) const noexcept {
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return copy[static_cast<size_t>(format_a)][static_cast<size_t>(format_b)];
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}
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private:
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Table view;
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Table copy;
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};
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} // namespace VideoCore::Surface
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