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https://github.com/ZDoom/gzdoom-gles.git
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770c676ac9
# Conflicts: # src/gl/renderer/gl_postprocess.cpp # src/gl/renderer/gl_stereo3d.cpp # src/hwrenderer/postprocessing/hw_presentshader.h
58 lines
2.7 KiB
GLSL
58 lines
2.7 KiB
GLSL
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in vec2 TexCoord;
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out vec4 FragColor;
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uniform sampler2D InputTexture;
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uniform float InvGamma;
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uniform float Contrast;
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uniform float Brightness;
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uniform float Saturation;
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uniform int GrayFormula;
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uniform float ColorScale;
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vec4 ApplyGamma(vec4 c)
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{
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vec3 valgray;
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if (GrayFormula == 0)
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valgray = vec3(c.r + c.g + c.b) * (1 - Saturation) / 3 + c.rgb * Saturation;
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else
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valgray = mix(vec3(dot(c.rgb, vec3(0.3,0.56,0.14))), c.rgb, Saturation);
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vec3 val = valgray * Contrast - (Contrast - 1.0) * 0.5;
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val += Brightness * 0.5;
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val = pow(max(val, vec3(0.0)), vec3(InvGamma));
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return vec4(val, c.a);
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}
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#define HALFSTEP 1./65.
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float DitherMatrix[64] = float[](
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0.0 / 16.0 + HALFSTEP * 1, 8.0 / 16.0 + HALFSTEP * 1, 2.0 / 16.0 + HALFSTEP * 1, 10.0 / 16.0 + HALFSTEP * 1,
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0.0 / 16.0 + HALFSTEP * 3, 8.0 / 16.0 + HALFSTEP * 3, 2.0 / 16.0 + HALFSTEP * 3, 10.0 / 16.0 + HALFSTEP * 3,
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12.0 / 16.0 + HALFSTEP * 1, 4.0 / 16.0 + HALFSTEP * 1, 14.0 / 16.0 + HALFSTEP * 1, 6.0 / 16.0 + HALFSTEP * 1,
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12.0 / 16.0 + HALFSTEP * 3, 4.0 / 16.0 + HALFSTEP * 3, 14.0 / 16.0 + HALFSTEP * 3, 6.0 / 16.0 + HALFSTEP * 3,
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3.0 / 16.0 + HALFSTEP * 1, 11.0 / 16.0 + HALFSTEP * 1, 1.0 / 16.0 + HALFSTEP * 1, 9.0 / 16.0 + HALFSTEP * 1,
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3.0 / 16.0 + HALFSTEP * 3, 11.0 / 16.0 + HALFSTEP * 3, 1.0 / 16.0 + HALFSTEP * 3, 9.0 / 16.0 + HALFSTEP * 3,
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15.0 / 16.0 + HALFSTEP * 1, 7.0 / 16.0 + HALFSTEP * 1, 13.0 / 16.0 + HALFSTEP * 1, 5.0 / 16.0 + HALFSTEP * 1,
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15.0 / 16.0 + HALFSTEP * 3, 7.0 / 16.0 + HALFSTEP * 3, 13.0 / 16.0 + HALFSTEP * 3, 5.0 / 16.0 + HALFSTEP * 3,
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0.0 / 16.0 + HALFSTEP * 4, 8.0 / 16.0 + HALFSTEP * 4, 2.0 / 16.0 + HALFSTEP * 4, 10.0 / 16.0 + HALFSTEP * 4,
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0.0 / 16.0 + HALFSTEP * 2, 8.0 / 16.0 + HALFSTEP * 2, 2.0 / 16.0 + HALFSTEP * 2, 10.0 / 16.0 + HALFSTEP * 2,
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12.0 / 16.0 + HALFSTEP * 4, 4.0 / 16.0 + HALFSTEP * 4, 14.0 / 16.0 + HALFSTEP * 4, 6.0 / 16.0 + HALFSTEP * 4,
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12.0 / 16.0 + HALFSTEP * 2, 4.0 / 16.0 + HALFSTEP * 2, 14.0 / 16.0 + HALFSTEP * 2, 6.0 / 16.0 + HALFSTEP * 2,
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3.0 / 16.0 + HALFSTEP * 4, 11.0 / 16.0 + HALFSTEP * 4, 1.0 / 16.0 + HALFSTEP * 4, 9.0 / 16.0 + HALFSTEP * 4,
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3.0 / 16.0 + HALFSTEP * 2, 11.0 / 16.0 + HALFSTEP * 2, 1.0 / 16.0 + HALFSTEP * 2, 9.0 / 16.0 + HALFSTEP * 2,
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15.0 / 16.0 + HALFSTEP * 4, 7.0 / 16.0 + HALFSTEP * 4, 13.0 / 16.0 + HALFSTEP * 4, 5.0 / 16.0 + HALFSTEP * 4,
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15.0 / 16.0 + HALFSTEP * 2, 7.0 / 16.0 + HALFSTEP * 2, 13.0 / 16.0 + HALFSTEP * 2, 5.0 / 16.0 + HALFSTEP * 2
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);
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vec4 Dither(vec4 c)
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{
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if (ColorScale == 0.0)
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return c;
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ivec2 pos = ivec2(gl_FragCoord.xy) & 7;
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float threshold = DitherMatrix[pos.x + (pos.y << 3)];
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return vec4(floor(c.rgb * ColorScale + threshold) / ColorScale, c.a);
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}
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void main()
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{
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FragColor = Dither(ApplyGamma(texture(InputTexture, TexCoord)));
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}
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