29 lines
879 B
GLSL
29 lines
879 B
GLSL
// pathfinder/shaders/gles2/blit-gamma.fs.glsl
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//
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// Copyright (c) 2017 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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//! Blits a texture, applying gamma correction.
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precision mediump float;
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/// The source texture to blit.
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uniform sampler2D uSource;
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/// The approximate background color, in linear RGB.
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uniform vec3 uBGColor;
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/// The gamma LUT.
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uniform sampler2D uGammaLUT;
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/// The incoming texture coordinate.
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varying vec2 vTexCoord;
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void main() {
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vec4 source = texture2D(uSource, vTexCoord);
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gl_FragColor = vec4(gammaCorrect(source.rgb, uBGColor, uGammaLUT), source.a);
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}
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