a401089a9d
By now it is just a "compositor", so move the files one folder up. Things that were under realtime_compositor/intern move into already existing intern folder. Pull Request: https://projects.blender.org/blender/blender/pulls/132004
49 lines
1.8 KiB
GLSL
49 lines
1.8 KiB
GLSL
/* SPDX-FileCopyrightText: 2023 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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/* Loops over all identifiers selected by the user, and accumulate the coverage of ranks whose
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* identifiers match that of the user selected identifiers.
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*
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* This is described in section "Matte Extraction: Implementation Details" in the original
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* Cryptomatte publication:
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*
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* Friedman, Jonah, and Andrew C. Jones. "Fully automatic id mattes with support for motion blur
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* and transparency." ACM SIGGRAPH 2015 Posters. 2015. 1-1.
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*/
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#include "gpu_shader_compositor_texture_utilities.glsl"
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void main()
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{
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ivec2 texel = ivec2(gl_GlobalInvocationID.xy);
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vec4 layer = texture_load(layer_tx, texel + lower_bound);
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/* Each Cryptomatte layer stores two ranks. */
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vec2 first_rank = layer.xy;
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vec2 second_rank = layer.zw;
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/* Each Cryptomatte rank stores a pair of an identifier and the coverage of the entity identified
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* by that identifier. */
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float identifier_of_first_rank = first_rank.x;
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float coverage_of_first_rank = first_rank.y;
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float identifier_of_second_rank = second_rank.x;
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float coverage_of_second_rank = second_rank.y;
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/* Loop over all identifiers selected by the user, if the identifier of either of the ranks match
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* it, accumulate its coverage. */
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float total_coverage = 0.0;
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for (int i = 0; i < identifiers_count; i++) {
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float identifier = identifiers[i];
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if (identifier_of_first_rank == identifier) {
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total_coverage += coverage_of_first_rank;
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}
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if (identifier_of_second_rank == identifier) {
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total_coverage += coverage_of_second_rank;
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}
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}
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/* Add the total coverage to the coverage accumulated by previous layers. */
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imageStore(matte_img, texel, imageLoad(matte_img, texel) + vec4(total_coverage));
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}
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