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19 lines
447 B
GLSL
19 lines
447 B
GLSL
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//
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// Example grayscale shader.
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//
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precision mediump float;
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varying vec2 v_texcoord;
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uniform sampler2D tex;
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void main() {
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vec4 pixColor = texture2D(tex, v_texcoord);
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gl_FragColor = vec4(
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pixColor[0] * 0.299 + pixColor[1] * 0.587 + pixColor[2] * 0.114,
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pixColor[0] * 0.299 + pixColor[1] * 0.587 + pixColor[2] * 0.114,
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pixColor[0] * 0.299 + pixColor[1] * 0.587 + pixColor[2] * 0.114,
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pixColor[3]
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);
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}
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