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