8e72bf937f
This PR migrates the subdiv_ibo_tris_comp.glsl to use shader create info. Due to naming collision shader_data needs to be accessed directly. Pull Request: https://projects.blender.org/blender/blender/pulls/134867
79 lines
2.3 KiB
GLSL
79 lines
2.3 KiB
GLSL
/* SPDX-FileCopyrightText: 2021-2023 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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/* Create index buffer for lines and loose lines. */
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#include "subdiv_lib.glsl"
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#ifndef LINES_LOOSE
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COMPUTE_SHADER_CREATE_INFO(subdiv_lines)
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#else
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COMPUTE_SHADER_CREATE_INFO(subdiv_lines_loose)
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#endif
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#ifndef LINES_LOOSE
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bool is_face_hidden(uint coarse_quad_index)
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{
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return (extra_coarse_face_data[coarse_quad_index] & shader_data.coarse_face_hidden_mask) != 0;
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}
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void emit_line(uint line_offset, uint quad_index, uint start_loop_index, uint corner_index)
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{
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uint vertex_index = start_loop_index + corner_index;
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uint coarse_quad_index = coarse_face_index_from_subdiv_quad_index(quad_index,
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shader_data.coarse_face_count);
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if ((shader_data.use_hide && is_face_hidden(coarse_quad_index)) ||
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(input_edge_draw_flag[vertex_index] == 0))
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{
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output_lines[line_offset + 0] = 0xffffffff;
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output_lines[line_offset + 1] = 0xffffffff;
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}
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else {
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/* Mod 4 so we loop back at the first vertex on the last loop index (3). */
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uint next_vertex_index = start_loop_index + (corner_index + 1) % 4;
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output_lines[line_offset + 0] = vertex_index;
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output_lines[line_offset + 1] = next_vertex_index;
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}
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}
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#endif
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void main()
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{
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uint index = get_global_invocation_index();
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if (index >= shader_data.total_dispatch_size) {
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return;
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}
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#ifdef LINES_LOOSE
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/* In the loose lines case, we execute for each line, with two vertices per line. */
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uint line_offset = shader_data.edge_loose_offset + index * 2;
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uint loop_index = shader_data.num_subdiv_loops + index * 2;
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if (lines_loose_flags[index] != 0) {
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/* Line is hidden. */
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output_lines[line_offset] = 0xffffffff;
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output_lines[line_offset + 1] = 0xffffffff;
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}
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else {
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output_lines[line_offset] = loop_index;
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output_lines[line_offset + 1] = loop_index + 1;
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}
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#else
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/* We execute for each quad, so the start index of the loop is quad_index * 4. */
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uint start_loop_index = index * 4;
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/* We execute for each quad, so the start index of the line is quad_index * 8 (with 2 vertices
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* per line). */
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uint start_line_index = index * 8;
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for (int i = 0; i < 4; i++) {
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emit_line(start_line_index + i * 2, index, start_loop_index, i);
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}
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#endif
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}
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