16 lines
347 B
GLSL
Executable File
16 lines
347 B
GLSL
Executable File
#version 300 es
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// Pure Blue Channel Shader - OPTIMIZED
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precision highp float;
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in vec2 v_texcoord;
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uniform sampler2D tex;
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out vec4 fragColor;
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const vec3 LUMA = vec3(0.2126, 0.7152, 0.0722);
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void main() {
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vec4 pixColor = texture(tex, v_texcoord);
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float gray = dot(pixColor.rgb, LUMA);
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fragColor = vec4(0.0, 0.0, gray, pixColor.a);
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}
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