453705553b
Fixes #654 - HUD/UI previously bypassed greyscale. r_greyscale now supports partial desaturation [0-1]. Removed unused legacy logic from tr_shade.c
15 lines
450 B
GLSL
15 lines
450 B
GLSL
uniform sampler2D u_TextureMap;
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uniform float u_Greyscale;
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varying vec2 var_TexCoords;
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// From Rec. 709-1 4.2 "Derivation of luminance signal"
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const vec3 LUMA = vec3(0.2125, 0.7154, 0.0721);
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void main() {
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vec4 color = texture2D(u_TextureMap, var_TexCoords);
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if (u_Greyscale > 0.0) {
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float y = dot(color.rgb, LUMA);
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color.rgb = mix(color.rgb, vec3(y), clamp(u_Greyscale, 0.0, 1.0));
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}
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gl_FragColor = color;
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} |