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Diffstat (limited to '')
-rw-r--r-- | src/video_core/renderer_vulkan/shaders/quad_indexed.comp | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/src/video_core/renderer_vulkan/shaders/quad_indexed.comp b/src/video_core/renderer_vulkan/shaders/quad_indexed.comp new file mode 100644 index 000000000..5a472ba9b --- /dev/null +++ b/src/video_core/renderer_vulkan/shaders/quad_indexed.comp @@ -0,0 +1,50 @@ +// Copyright 2020 yuzu Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +/* + * Build instructions: + * $ glslangValidator -V quad_indexed.comp -o output.spv + * $ spirv-opt -O --strip-debug output.spv -o optimized.spv + * $ xxd -i optimized.spv + * + * Then copy that bytecode to the C++ file + */ + +#version 460 core + +layout (local_size_x = 1024) in; + +layout (std430, set = 0, binding = 0) readonly buffer InputBuffer { + uint input_indexes[]; +}; + +layout (std430, set = 0, binding = 1) writeonly buffer OutputBuffer { + uint output_indexes[]; +}; + +layout (push_constant) uniform PushConstants { + uint base_vertex; + int index_shift; // 0: uint8, 1: uint16, 2: uint32 +}; + +void main() { + int primitive = int(gl_GlobalInvocationID.x); + if (primitive * 6 >= output_indexes.length()) { + return; + } + + int index_size = 8 << index_shift; + int flipped_shift = 2 - index_shift; + int mask = (1 << flipped_shift) - 1; + + const int quad_swizzle[6] = int[](0, 1, 2, 0, 2, 3); + for (uint vertex = 0; vertex < 6; ++vertex) { + int offset = primitive * 4 + quad_swizzle[vertex]; + int int_offset = offset >> flipped_shift; + int bit_offset = (offset & mask) * index_size; + uint packed_input = input_indexes[int_offset]; + uint index = bitfieldExtract(packed_input, bit_offset, index_size); + output_indexes[primitive * 6 + vertex] = index + base_vertex; + } +} |