31 lines
826 B
Plaintext
31 lines
826 B
Plaintext
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uniform sampler2D u_texture_y;
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uniform sampler2D u_texture_cb;
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uniform sampler2D u_texture_cr;
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uniform float u_gamma;
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in vec2 uv;
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out vec4 fragcolor;
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void main() {
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float y = texture(u_texture_y, uv).r;
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float cb = texture(u_texture_cb, uv).r;
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float cr = texture(u_texture_cr, uv).r;
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const mat4 to_rgb = mat4(
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1.0000, 1.0000, 1.0000, 0.0000,
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0.0000, -0.3441, 1.7720, 0.0000,
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1.4020, -0.7141, 0.0000, 0.0000,
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-0.7010, 0.5291, -0.8860, 1.0000
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);
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vec4 texel = to_rgb * vec4(y, cb, cr, 1.0);
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texel.rgb = pow(texel.rgb, vec3(1.0 / u_gamma));
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if(false) { float saturation = 2.0; const vec3 W = vec3(0.2125, 0.7154, 0.0721);
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vec3 intensity = vec3(dot(texel.rgb, W));
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texel.rgb = mix(intensity, texel.rgb, saturation); }
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fragcolor = vec4(texel.rgb, 1.0);
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}
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