33 lines
862 B
GLSL
33 lines
862 B
GLSL
#ifdef GL_ES
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precision highp float;
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#endif
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uniform sampler2D texture;
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uniform mat3 color_matrix;
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uniform float inv_gamma;
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uniform float blacklevel;
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varying vec2 top_left_uv;
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varying vec2 top_right_uv;
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varying vec2 bottom_left_uv;
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varying vec2 bottom_right_uv;
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void
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main()
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{
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// Note the coordinates for texture samples need to be a varying, as the
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// Mali-400 has this as a fast path allowing 32-bit floats. Otherwise
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// they end up as 16-bit floats and that's not accurate enough.
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vec4 samples = vec4(texture2D(texture, top_left_uv).r,
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texture2D(texture, top_right_uv).r,
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texture2D(texture, bottom_left_uv).r,
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texture2D(texture, bottom_right_uv).r);
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vec3 color = vec3(samples.x, samples.y, samples.z);
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color *= color_matrix;
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vec3 gamma_color = pow(color, vec3(inv_gamma));
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gl_FragColor = vec4(gamma_color, 1);
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}
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