mirror of
https://github.com/gnif/LookingGlass.git
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8559b354ae
We ask for 32-bit colour buffer when creating the EGL context. On Wayland, this sometimes give contexts with alpha channels, resulting in unwanted transparency. So we clear the alpha channel in the desktop shader. We also switch to using constant alpha for blending the splash, which avoids more alpha issues.
90 lines
2.2 KiB
GLSL
90 lines
2.2 KiB
GLSL
#version 300 es
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in highp vec2 uv;
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out highp vec4 color;
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uniform sampler2D sampler1;
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uniform int nearest;
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uniform highp vec2 size;
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uniform int rotate;
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uniform int nv;
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uniform highp float nvGain;
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uniform int cbMode;
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void main()
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{
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highp vec2 ruv;
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if (rotate == 0) // 0
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{
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ruv = uv;
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}
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else if (rotate == 1) // 90
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{
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ruv.x = uv.y;
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ruv.y = -uv.x + 1.0f;
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}
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else if (rotate == 2) // 180
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{
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ruv.x = -uv.x + 1.0f;
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ruv.y = -uv.y + 1.0f;
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}
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else if (rotate == 3) // 270
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{
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ruv.x = -uv.y + 1.0f;
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ruv.y = uv.x;
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}
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if(nearest == 1)
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color = texture(sampler1, ruv);
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else
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color = texelFetch(sampler1, ivec2(ruv * size), 0);
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if (cbMode > 0)
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{
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highp float L = (17.8824000 * color.r) + (43.516100 * color.g) + (4.11935 * color.b);
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highp float M = (03.4556500 * color.r) + (27.155400 * color.g) + (3.86714 * color.b);
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highp float S = (00.0299566 * color.r) + (00.184309 * color.g) + (1.46709 * color.b);
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highp float l, m, s;
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if (cbMode == 1) // Protanope
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{
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l = 0.0f * L + 2.02344f * M + -2.52581f * S;
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m = 0.0f * L + 1.0f * M + 0.0f * S;
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s = 0.0f * L + 0.0f * M + 1.0f * S;
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}
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else if (cbMode == 2) // Deuteranope
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{
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l = 1.000000 * L + 0.0f * M + 0.00000 * S;
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m = 0.494207 * L + 0.0f * M + 1.24827 * S;
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s = 0.000000 * L + 0.0f * M + 1.00000 * S;
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}
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else if (cbMode == 3) // Tritanope
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{
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l = 1.000000 * L + 0.000000 * M + 0.0 * S;
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m = 0.000000 * L + 1.000000 * M + 0.0 * S;
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s = -0.395913 * L + 0.801109 * M + 0.0 * S;
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}
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highp vec4 error;
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error.r = ( 0.080944447900 * l) + (-0.13050440900 * m) + ( 0.116721066 * s);
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error.g = (-0.010248533500 * l) + ( 0.05401932660 * m) + (-0.113614708 * s);
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error.b = (-0.000365296938 * l) + (-0.00412161469 * m) + ( 0.693511405 * s);
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error.a = 0.0;
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error = color - error;
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color.g += (error.r * 0.7) + (error.g * 1.0);
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color.b += (error.r * 0.7) + (error.b * 1.0);
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}
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if (nv == 1)
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{
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highp float lumi = 1.0 - (0.2126 * color.r + 0.7152 * color.g + 0.0722 * color.b);
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color *= 1.0 + lumi;
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color *= nvGain;
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}
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color.a = 1.0;
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}
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