22 lines
534 B
Plaintext
22 lines
534 B
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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vec3 greyscale(vec3 color, float str) {
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float g = dot(color, vec3(0.299, 0.587, 0.114));
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return mix(color, vec3(g), str);
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}
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vec3 greyscale(vec3 color) {
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return greyscale(color, 1.0);
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}
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void main() {
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vec4 c = texture2D(tex, cogl_tex_coord_in[0].st);
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vec3 pix_color = greyscale(c.rgb);
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vec3 color = vec3(red * c.a, green * c.a, blue * c.a);
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cogl_color_out = vec4(mix(pix_color, color, blend), c.a);
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}
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