31 lines
798 B
GLSL
31 lines
798 B
GLSL
#version 330
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// pathfinder/shaders/tile_alpha_difference.fs.glsl
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//
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// Copyright © 2020 The Pathfinder Project Developers.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// The difference blend mode.
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#extension GL_GOOGLE_include_directive : enable
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precision highp float;
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out vec4 oFragColor;
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#include "tile_alpha_sample.inc.glsl"
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void main() {
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vec4 srcRGBA = sampleSrcColor();
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vec4 destRGBA = sampleDestColor();
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vec3 blended = abs(destRGBA.rgb - srcRGBA.rgb);
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oFragColor = blendColors(destRGBA, srcRGBA, blended);
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}
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