58 lines
1.3 KiB
GLSL
58 lines
1.3 KiB
GLSL
# version 100
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precision mediump float;
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// Input vertex attributes (from vertex shader)
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varying vec2 fragTexCoord;
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varying vec4 fragColor;
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// Input uniform values
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uniform sampler2D texture0;
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uniform vec4 colDiffuse;
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// NOTE: Add here your custom variables
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// NOTE: Render size values must be passed from code
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const float renderWidth = 800;
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const float renderHeight = 450;
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float stitchingSize = 6.0f;
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uniform int invert = 0;
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vec4 PostFX(sampler2D tex, vec2 uv)
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{
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vec4 c = vec4(0.0);
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float size = stitchingSize;
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vec2 cPos = uv * vec2(renderWidth, renderHeight);
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vec2 tlPos = floor(cPos / vec2(size, size));
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tlPos *= size;
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int remX = int(mod(cPos.x, size));
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int remY = int(mod(cPos.y, size));
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if (remX == 0 && remY == 0) tlPos = cPos;
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vec2 blPos = tlPos;
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blPos.y += (size - 1.0);
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if ((remX == remY) || (((int(cPos.x) - int(blPos.x)) == (int(blPos.y) - int(cPos.y)))))
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{
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if (invert == 1) c = vec4(0.2, 0.15, 0.05, 1.0);
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else c = texture2D(tex, tlPos * vec2(1.0/renderWidth, 1.0/renderHeight)) * 1.4;
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}
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else
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{
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if (invert == 1) c = texture2D(tex, tlPos * vec2(1.0/renderWidth, 1.0/renderHeight)) * 1.4;
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else c = vec4(0.0, 0.0, 0.0, 1.0);
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}
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return c;
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}
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void main()
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{
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vec3 tc = PostFX(texture0, fragTexCoord).rgb;
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gl_FragColor = vec4(tc, 1.0);
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} |