mirror of
https://github.com/gnif/LookingGlass.git
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ba6f26393f
This commit fixes the issues with the meaning of useNearest being flipped by removing the variable and use enumerations. We define an enumeration EGL_DesktopScaleType to express the type of scaling needed to be performed: no scaling, upscaling, or downscaling. This is updated when either the frame size or the viewport size changes. Previously, we only updated the useNearest when the frame size changes. The desktop shader can now support an enumeration of scaling algorithms, although only nearest and linear are currently implemented. Like before, nearest is used when not scaling or upscaling, and linear is used when downscaling.
99 lines
2.3 KiB
GLSL
99 lines
2.3 KiB
GLSL
#version 300 es
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#define LG_SCALE_NEAREST 0
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#define LG_SCALE_LINEAR 1
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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 scaleAlgo;
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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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switch (scaleAlgo)
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{
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case LG_SCALE_NEAREST:
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color = texelFetch(sampler1, ivec2(ruv * size), 0);
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break;
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case LG_SCALE_LINEAR:
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color = texture(sampler1, ruv);
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break;
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}
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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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