зеркало из https://github.com/mozilla/gecko-dev.git
50 строки
1.8 KiB
GLSL
50 строки
1.8 KiB
GLSL
#line 1
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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struct SplitGeometry {
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vec3 points[4];
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};
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SplitGeometry fetch_split_geometry(int address) {
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ivec2 uv = get_resource_cache_uv(address);
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vec4 data0 = texelFetchOffset(sResourceCache, uv, 0, ivec2(0, 0));
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vec4 data1 = texelFetchOffset(sResourceCache, uv, 0, ivec2(1, 0));
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vec4 data2 = texelFetchOffset(sResourceCache, uv, 0, ivec2(2, 0));
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SplitGeometry geo;
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geo.points = vec3[4](
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data0.xyz, vec3(data0.w, data1.xy),
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vec3(data1.zw, data2.x), data2.yzw
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);
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return geo;
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}
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vec3 bilerp(vec3 a, vec3 b, vec3 c, vec3 d, float s, float t) {
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vec3 x = mix(a, b, t);
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vec3 y = mix(c, d, t);
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return mix(x, y, s);
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}
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void main(void) {
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CompositeInstance ci = fetch_composite_instance();
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SplitGeometry geometry = fetch_split_geometry(ci.user_data0);
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AlphaBatchTask src_task = fetch_alpha_batch_task(ci.src_task_index);
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vec3 world_pos = bilerp(geometry.points[0], geometry.points[1],
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geometry.points[3], geometry.points[2],
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aPosition.y, aPosition.x);
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vec4 final_pos = vec4(world_pos.xy * uDevicePixelRatio, ci.z, 1.0);
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gl_Position = uTransform * final_pos;
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vec2 uv_origin = src_task.render_target_origin;
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vec2 uv_pos = uv_origin + world_pos.xy - src_task.screen_space_origin;
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vec2 texture_size = vec2(textureSize(sCacheRGBA8, 0));
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vUv = vec3(uv_pos / texture_size, src_task.render_target_layer_index);
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vUvTaskBounds = vec4(uv_origin, uv_origin + src_task.size) / texture_size.xyxy;
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vUvSampleBounds = vec4(uv_origin + 0.5, uv_origin + src_task.size - 0.5) / texture_size.xyxy;
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}
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