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shader: initialize perspective sample barycentrics at SampleId

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This commit is contained in:
Claxten
2026-10-07 18:22:36 +04:00
committed by nmzik
parent fbf6ae400c
commit 3ba6ebae81
8 changed files with 99 additions and 6 deletions
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tests/ShaderRecompilerComputeTests.cpp
+26
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@@ -1344,6 +1344,7 @@ struct GraphicsCase {
bool pixel_position_w = false;
float vertex_clip_w = 1.0f;
bool pixel_depth_export = false;
u32 pixel_perspective_sample_vgpr = UINT32_MAX;
u32 pixel_perspective_centroid_vgpr = UINT32_MAX;
u32 pixel_custom_interpolation_mask = 0;
};
@@ -1761,6 +1762,7 @@ CompiledShader CompileFragmentCase(const GraphicsCase &test) {
pixel_info.ps_pos_w = test.pixel_position_w;
pixel_info.ps_depth_export_enable = test.pixel_depth_export;
pixel_info.ps_system_input_base = 2;
pixel_info.ps_perspective_sample_vgpr = test.pixel_perspective_sample_vgpr;
pixel_info.ps_perspective_centroid_vgpr = test.pixel_perspective_centroid_vgpr;
pixel_info.custom_interpolation_mask = test.pixel_custom_interpolation_mask;
for (u32 i = 0; i < std::size(pixel_info.interpolator_settings); i++) {
@@ -35107,6 +35109,26 @@ GraphicsCase GraphicsPackedHalfCentroid() {
return test;
}
GraphicsCase GraphicsPerspectiveSample(bool multisample) {
GraphicsCase test;
test.name = multisample ? "GraphicsPerspectiveSample4x"
: "GraphicsPerspectiveSample1x";
test.pixel_perspective_sample_vgpr = 0;
test.samples = multisample ? vk::SampleCountFlagBits::e4
: vk::SampleCountFlagBits::e1;
test.fragment_code = {
EncodeVop2(0x08, 2, Vgpr(0), 0), // I squared
EncodeVop2(0x08, 3, Vgpr(1), 1), // J squared
EncodeExp0(0x00, 0xf), EncodeExp1(2, 3, 0, 1)};
AppendEnd(&test.fragment_code);
// The triangle gives I=x/2, J=y/2. Squaring before the 4x resolve
// distinguishes sample interpolation (21/256) from pixel-center (1/16).
const auto square = std::bit_cast<u32>(multisample ? 21.0f / 256.0f : 1.0f / 16.0f);
test.expected_pixel = {square, square, 0x3e800000u, 0x3e800000u};
test.opcodes = {ShaderOpcode::V_MUL_F32, ShaderOpcode::EXP, ShaderOpcode::S_ENDPGM};
return test;
}
GraphicsCase GraphicsPackedHalfInputAlias(bool second_weights) {
auto test = GraphicsPackedHalfCentroid();
test.name = second_weights ? "GraphicsPackedHalfAliasSecondWeights"
@@ -35982,6 +36004,8 @@ std::vector<GraphicsCase> MakeGraphicsCases() {
GraphicsInterpolationExport(),
GraphicsPositionWExport(),
GraphicsPackedHalfCentroid(),
GraphicsPerspectiveSample(false),
GraphicsPerspectiveSample(true),
GraphicsPackedHalfInputAlias(false),
GraphicsPackedHalfInputAlias(true),
GraphicsSmoothRawInputAlias(),
@@ -41299,6 +41323,8 @@ int main(int argc, char **argv) {
if (argc == 2 && std::strcmp(argv[1], "--centroid-only") == 0) {
VulkanHarness vulkan;
RunGraphicsCase(&vulkan, GraphicsPackedHalfCentroid());
RunGraphicsCase(&vulkan, GraphicsPerspectiveSample(false));
RunGraphicsCase(&vulkan, GraphicsPerspectiveSample(true));
return 0;
}
if (argc == 2 && std::strcmp(argv[1], "--pixel-alias-only") == 0) {