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12 lines
273 B
GLSL
12 lines
273 B
GLSL
uniform sampler2D source;
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uniform vec2 size;
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uniform vec4 crop;
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uniform float alpha;
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out vec4 outColor;
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void main() {
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vec2 p = vec2(gl_FragCoord.x, size.y - gl_FragCoord.y) / size;
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vec4 c = texture(source, crop.xy + p * crop.zw);
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outColor = vec4(c.rgb, c.a * alpha);
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}
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