forked from suyu/suyu
42 lines
1.4 KiB
Text
42 lines
1.4 KiB
Text
// SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
|
|
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
|
|
#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
|
|
int is_strip; // 0: quads 1: quadstrip
|
|
};
|
|
|
|
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 quads_swizzle[6] = int[](0, 1, 2, 0, 2, 3);
|
|
const int quad_strip_swizzle[6] = int[](0, 3, 1, 0, 2, 3);
|
|
for (uint vertex = 0; vertex < 6; ++vertex) {
|
|
int offset = (is_strip == 0 ? primitive * 4 + quads_swizzle[vertex] : primitive * 2 + quad_strip_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;
|
|
}
|
|
}
|