100 lines
3.2 KiB
C++
100 lines
3.2 KiB
C++
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// Copyright 2021 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 <vector>
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#include "common/alignment.h"
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#include "common/assert.h"
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#include "shader_recompiler/shader_info.h"
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#include "video_core/transform_feedback.h"
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namespace VideoCommon {
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std::vector<Shader::TransformFeedbackVarying> MakeTransformFeedbackVaryings(
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const TransformFeedbackState& state) {
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static 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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std::vector<Shader::TransformFeedbackVarying> xfb(256);
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for (size_t buffer = 0; buffer < state.layouts.size(); ++buffer) {
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const auto& locations = state.varyings[buffer];
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const auto& layout = state.layouts[buffer];
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const u32 varying_count = layout.varying_count;
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u32 highest = 0;
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for (u32 offset = 0; offset < varying_count; ++offset) {
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const u32 base_offset = offset;
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const u8 location = locations[offset];
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UNIMPLEMENTED_IF_MSG(layout.stream != 0, "Stream is not zero: {}", layout.stream);
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Shader::TransformFeedbackVarying varying{
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.buffer = static_cast<u32>(buffer),
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.stride = layout.stride,
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.offset = offset * 4,
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.components = 1,
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};
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if (std::ranges::find(VECTORS, Common::AlignDown(location, 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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xfb[location] = varying;
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highest = std::max(highest, (base_offset + varying.components) * 4);
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}
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UNIMPLEMENTED_IF(highest != layout.stride);
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}
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return xfb;
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}
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} // namespace VideoCommon
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