mirror of
https://github.com/KytyPS5/KytyPS5.git
synced 2026-10-20 19:07:01 +02:00
nmzik
61 lines
2.1 KiB
C++
61 lines
2.1 KiB
C++
#include "graphics/shader/shader.h"
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#include "common/assert.h"
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namespace Libs::Graphics {
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namespace {
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constexpr uint32_t PsInputOffsetMask = 0x0000001fu;
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constexpr uint32_t PsInputFlatShade = 0x00000400u;
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} // namespace
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uint32_t ShaderPixelParameterMappedLocation(const ShaderPixelInputInfo& info, uint32_t input) {
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return input < info.input_num ? info.interpolator_settings[input] & PsInputOffsetMask : input;
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}
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uint32_t ShaderPixelParameterLocation(const ShaderPixelInputInfo& info,
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std::span<const uint32_t> active_inputs, uint32_t input) {
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std::array<bool, 32> used_locations {};
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for (const auto active_input: active_inputs) {
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used_locations[ShaderPixelParameterMappedLocation(info, active_input)] = true;
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}
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std::array<uint32_t, 64> group_locations;
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group_locations.fill(UINT32_MAX);
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for (const auto active_input: active_inputs) {
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const auto mapped = ShaderPixelParameterMappedLocation(info, active_input);
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const auto group = mapped * 2u + ShaderPixelParameterIsFlat(info, active_input);
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auto& location = group_locations[group];
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if (location == UINT32_MAX) {
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location = mapped;
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// Smooth and custom interpolation read the same vertex output. Only
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// differing flat/smooth rectangle outputs need separate locations.
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if (group_locations[group ^ 1u] != UINT32_MAX) {
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location = 0;
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while (location < used_locations.size() && used_locations[location]) {
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location++;
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}
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EXIT_NOT_IMPLEMENTED(location >= used_locations.size());
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}
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used_locations[location] = true;
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}
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if (active_input == input) {
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return location;
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}
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}
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return ShaderPixelParameterMappedLocation(info, input);
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}
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bool ShaderPixelParameterIsFlat(const ShaderPixelInputInfo& info, uint32_t input) {
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return input < info.input_num && (info.interpolator_settings[input] & PsInputFlatShade) != 0 &&
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!ShaderPixelParameterIsCustom(info, input);
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}
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bool ShaderPixelParameterIsCustom(const ShaderPixelInputInfo& info, uint32_t input) {
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return input < 32u && (info.custom_interpolation_mask & (1u << input)) != 0;
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}
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} // namespace Libs::Graphics
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