96 lines
3.5 KiB
GLSL
96 lines
3.5 KiB
GLSL
/**
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*
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* RenderPipeline
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*
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* Copyright (c) 2014-2016 tobspr <tobias.springer1@gmail.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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*/
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#version 430
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#pragma include "render_pipeline_base.inc.glsl"
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uniform int sourceMip;
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uniform sampler2D SourceTex;
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uniform writeonly image2D RESTRICT DestTex;
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uniform sampler2D ShadedScene;
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uniform sampler2D SumTex;
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uniform bool FirstUpsamplePass;
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void main() {
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vec2 source_size = vec2(textureSize(SourceTex, sourceMip).xy);
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vec2 texcoord = (ivec2(gl_FragCoord.xy) + 0.5) / (2.0 * source_size);
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vec3 summed = textureLod(SourceTex, texcoord, sourceMip + 1).xyz;
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if (FirstUpsamplePass) {
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summed = vec3(0);
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}
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vec3 mip_color = vec3(1);
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// Hardcoded mipmap colors for now, should make this adjustable at some point
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switch(sourceMip) {
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case 0: mip_color = vec3(0.214, 0.429, 0.497); break;
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case 1: mip_color = vec3(0.964, 0.947, 0.991); break;
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case 2: mip_color = vec3(0.982, 0.542, 0.542); break;
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case 3: mip_color = vec3(0.301, 0.493, 1.000); break;
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case 4: mip_color = vec3(0.456, 0.209, 0.167); break;
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}
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// upsample texture
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ivec2 coord = ivec2(gl_FragCoord.xy);
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vec2 flt_coord = vec2(coord) / (2.0 * source_size);
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vec2 texel_size = 1.0 / source_size;
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vec3 source_sample = textureLod(SourceTex, flt_coord, sourceMip).xyz * 4;
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source_sample += textureLod(
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SourceTex, flt_coord + vec2(0, 1) * texel_size, sourceMip).xyz * 2;
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source_sample += textureLod(
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SourceTex, flt_coord + vec2(0, -1) * texel_size, sourceMip).xyz * 2;
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source_sample += textureLod(
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SourceTex, flt_coord + vec2(1, 0) * texel_size, sourceMip).xyz * 2;
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source_sample += textureLod(
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SourceTex, flt_coord + vec2(-1, 0) * texel_size, sourceMip).xyz * 2;
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source_sample += textureLod(
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SourceTex, flt_coord + vec2(-1, -1) * texel_size, sourceMip).xyz;
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source_sample += textureLod(
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SourceTex, flt_coord + vec2(1, -1) * texel_size, sourceMip).xyz;
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source_sample += textureLod(
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SourceTex, flt_coord + vec2(-1, 1) * texel_size, sourceMip).xyz;
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source_sample += textureLod(
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SourceTex, flt_coord + vec2(1, 1) * texel_size, sourceMip).xyz;
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source_sample /= 16.0;
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source_sample *= mip_color;
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vec3 pass_result = summed + source_sample;
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pass_result *= 0.5;
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vec4 old_data = texelFetch(SourceTex, coord, sourceMip - 1);
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imageStore(DestTex, coord, old_data + vec4(pass_result, 0));
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}
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