shader/transform_feedback: Add host API friendly TFB builder
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666d431ad8
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@ -102,6 +102,8 @@ set(HASH_FILES
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"${VIDEO_CORE}/shader/shader_ir.cpp"
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"${VIDEO_CORE}/shader/shader_ir.h"
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"${VIDEO_CORE}/shader/track.cpp"
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"${VIDEO_CORE}/shader/transform_feedback.cpp"
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"${VIDEO_CORE}/shader/transform_feedback.h"
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)
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set(COMBINED "")
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foreach (F IN LISTS HASH_FILES)
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@ -83,6 +83,8 @@ add_custom_command(OUTPUT scm_rev.cpp
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"${VIDEO_CORE}/shader/shader_ir.cpp"
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"${VIDEO_CORE}/shader/shader_ir.h"
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"${VIDEO_CORE}/shader/track.cpp"
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"${VIDEO_CORE}/shader/transform_feedback.cpp"
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"${VIDEO_CORE}/shader/transform_feedback.h"
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# and also check that the scm_rev files haven't changed
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"${CMAKE_CURRENT_SOURCE_DIR}/scm_rev.cpp.in"
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"${CMAKE_CURRENT_SOURCE_DIR}/scm_rev.h"
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@ -129,6 +129,8 @@ add_library(video_core STATIC
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shader/shader_ir.cpp
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shader/shader_ir.h
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shader/track.cpp
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shader/transform_feedback.cpp
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shader/transform_feedback.h
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surface.cpp
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surface.h
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texture_cache/format_lookup_table.cpp
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@ -0,0 +1,114 @@
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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 <algorithm>
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#include <array>
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#include <unordered_map>
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#include "common/assert.h"
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#include "common/common_types.h"
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#include "video_core/engines/maxwell_3d.h"
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#include "video_core/shader/registry.h"
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#include "video_core/shader/transform_feedback.h"
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namespace VideoCommon::Shader {
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namespace {
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using Maxwell = Tegra::Engines::Maxwell3D::Regs;
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// TODO(Rodrigo): Change this to constexpr std::unordered_set in C++20
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/// Attribute offsets that describe a vector
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constexpr std::array VECTORS = {
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28, // gl_Position
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32, // Generic 0
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36, // Generic 1
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40, // Generic 2
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44, // Generic 3
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48, // Generic 4
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52, // Generic 5
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56, // Generic 6
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60, // Generic 7
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64, // Generic 8
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68, // Generic 9
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72, // Generic 10
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76, // Generic 11
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80, // Generic 12
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84, // Generic 13
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88, // Generic 14
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92, // Generic 15
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96, // Generic 16
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100, // Generic 17
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104, // Generic 18
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108, // Generic 19
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112, // Generic 20
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116, // Generic 21
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120, // Generic 22
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124, // Generic 23
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128, // Generic 24
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132, // Generic 25
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136, // Generic 26
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140, // Generic 27
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144, // Generic 28
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148, // Generic 29
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152, // Generic 30
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156, // Generic 31
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160, // gl_FrontColor
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164, // gl_FrontSecondaryColor
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160, // gl_BackColor
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164, // gl_BackSecondaryColor
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192, // gl_TexCoord[0]
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196, // gl_TexCoord[1]
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200, // gl_TexCoord[2]
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204, // gl_TexCoord[3]
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208, // gl_TexCoord[4]
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212, // gl_TexCoord[5]
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216, // gl_TexCoord[6]
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220, // gl_TexCoord[7]
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};
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} // namespace
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std::unordered_map<u8, VaryingTFB> BuildTransformFeedback(const GraphicsInfo& info) {
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std::unordered_map<u8, VaryingTFB> tfb;
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for (std::size_t buffer = 0; buffer < Maxwell::NumTransformFeedbackBuffers; ++buffer) {
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const auto& locations = info.tfb_varying_locs[buffer];
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const auto& layout = info.tfb_layouts[buffer];
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const std::size_t varying_count = layout.varying_count;
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std::size_t highest = 0;
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for (std::size_t offset = 0; offset < varying_count; ++offset) {
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const std::size_t base_offset = offset;
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const u8 location = locations[offset];
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VaryingTFB varying;
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varying.buffer = layout.stream;
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varying.offset = offset * sizeof(u32);
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varying.components = 1;
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if (std::find(VECTORS.begin(), VECTORS.end(), location / 4 * 4) != VECTORS.end()) {
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UNIMPLEMENTED_IF_MSG(location % 4 != 0, "Unaligned TFB");
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const u8 base_index = location / 4;
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while (offset + 1 < varying_count && base_index == locations[offset + 1] / 4) {
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++offset;
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++varying.components;
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}
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}
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[[maybe_unused]] const bool inserted = tfb.emplace(location, varying).second;
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UNIMPLEMENTED_IF_MSG(!inserted, "Varying already stored");
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highest = std::max(highest, (base_offset + varying.components) * sizeof(u32));
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}
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UNIMPLEMENTED_IF(highest != layout.stride);
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}
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return tfb;
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}
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} // namespace VideoCommon::Shader
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@ -0,0 +1,22 @@
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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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#pragma once
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#include <unordered_map>
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#include "common/common_types.h"
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#include "video_core/shader/registry.h"
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namespace VideoCommon::Shader {
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struct VaryingTFB {
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std::size_t buffer;
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std::size_t offset;
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std::size_t components;
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};
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std::unordered_map<u8, VaryingTFB> BuildTransformFeedback(const GraphicsInfo& info);
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} // namespace VideoCommon::Shader
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