MonkeyGG2
13 lines
312 B
GLSL
13 lines
312 B
GLSL
precision lowp float;
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varying vec2 vTextureCoord;
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uniform sampler2D uSampler;
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void main(void) {
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vec4 f = texture2D(uSampler, vTextureCoord);
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// Convert to grayscale using NTSC conversion weights
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float luma = dot(f.rgb, vec3(0.299, 0.587, 0.114));
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gl_FragColor = vec4(luma, luma, luma, f.a);
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}
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