41 lines
1.5 KiB
Plaintext
41 lines
1.5 KiB
Plaintext
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uniform sampler2D tex;
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uniform float red;
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uniform float green;
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uniform float blue;
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uniform float blend;
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uniform vec2 textureSize; // Size of the texture being sampled
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// Function to perform a simple blur
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vec4 blur(sampler2D texture, vec2 texCoord) {
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vec4 sum = vec4(0.0);
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float blurSize = 0.05; // Adjust this for different blur strengths
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// Sample neighboring pixels and average their colors
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sum += texture2D(texture, texCoord + vec2(-blurSize, -blurSize));
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sum += texture2D(texture, texCoord + vec2(0.0, -blurSize));
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sum += texture2D(texture, texCoord + vec2(blurSize, -blurSize));
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sum += texture2D(texture, texCoord + vec2(-blurSize, 0.0));
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sum += texture2D(texture, texCoord);
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sum += texture2D(texture, texCoord + vec2(blurSize, 0.0));
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sum += texture2D(texture, texCoord + vec2(-blurSize, blurSize));
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sum += texture2D(texture, texCoord + vec2(0.0, blurSize));
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sum += texture2D(texture, texCoord + vec2(blurSize, blurSize));
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return sum / 9.0; // Adjust divisor for different blur strengths
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}
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void main() {
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vec2 texCoord = cogl_tex_coord_in[0].st;
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vec4 original = texture2D(tex, texCoord);
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if (original.a >= 0.5) {
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vec4 blurred = blur(tex, texCoord);
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// blurred.a = original.a;
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vec3 pix_color = blurred.rgb;
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vec3 color = vec3(red * blurred.a, green * blurred.a, blue * blurred.a);
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vec3 finalColor = mix(pix_color, color, blend * 0.75);
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cogl_color_out = vec4(finalColor, (blurred.a + original.a)/2);
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} else {
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cogl_color_out = original;
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}
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}
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