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[D3D12] HLSL alphatest

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This commit is contained in:
Triang3l
2018-08-16 13:44:48 +03:00
parent 8d2bfd4b88
commit d94ebaf580
3 changed files with 61 additions and 4 deletions
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23
src/xenia/gpu/hlsl_shader_translator.cc
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@@ -177,6 +177,9 @@ std::vector<uint8_t> HlslShaderTranslator::CompleteTranslation() {
" float xe_pixel_half_pixel_offset;\n"
" float2 xe_ssaa_inv_scale;\n"
" uint xe_pixel_pos_reg;\n"
" bool xe_alpha_test_enabled;\n"
" float2 xe_alpha_test_range;\n"
" bool xe_alpha_test_range_pass;\n"
" uint4 xe_color_output_map;\n"
"};\n"
"\n"
@@ -382,15 +385,29 @@ std::vector<uint8_t> HlslShaderTranslator::CompleteTranslation() {
" xe_output.position.xyz * xe_ndc_scale +\n"
" xe_ndc_offset * xe_output.position.www;\n");
} else if (is_pixel_shader()) {
// Remap guest color outputs to host render targets because null render
// target descriptors are broken.
source.Append(
// Perform alpha test - check if the alpha is within the specified
// bounds (inclusively), fail or pass depending on comparison mode and
// on the results of the bound test.
" [branch] if (xe_alpha_test_enabled) {\n"
" bool xe_alpha_test_failed =\n"
" xe_color_output[0u].a >= xe_alpha_test_range.x &&\n"
" xe_color_output[0u].a <= xe_alpha_test_range.y;\n"
" [flatten] if (xe_alpha_test_range_pass) {\n"
" xe_alpha_test_failed = !xe_alpha_test_failed;\n"
" }\n"
" if (xe_alpha_test_failed) {\n"
" discard;\n"
" }\n"
" }\n"
// Remap guest color outputs to host render targets because null render
// target descriptors are broken.
" xe_output.colors[0] = xe_color_output[xe_color_output_map.r];\n"
" xe_output.colors[1] = xe_color_output[xe_color_output_map.g];\n"
" xe_output.colors[2] = xe_color_output[xe_color_output_map.b];\n"
" xe_output.colors[3] = xe_color_output[xe_color_output_map.a];\n");
}
// TODO(Triang3l): Window offset, half pixel offset, alpha test, gamma.
// TODO(Triang3l): Half pixel offset, alpha test, gamma.
source.Append(
" return xe_output;\n"
"}\n");