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processing4/java/examples/Topics/Shaders/ImageMask/data/mask.glsl
2012-09-05 23:47:44 +00:00

17 lines
461 B
GLSL

#ifdef GL_ES
precision mediump float;
precision mediump int;
#endif
uniform sampler2D textureSampler;
uniform sampler2D maskSampler;
uniform vec2 texcoordOffset;
varying vec4 vertColor;
varying vec4 vertTexcoord;
void main() {
vec4 texColor = texture2D(textureSampler, vertTexcoord.st).rgba;
vec4 maskColor = texture2D(maskSampler, vec2(vertTexcoord.s, 1.0 - vertTexcoord.t)).rgba;
gl_FragColor = mix(texColor, vec4(0, 0, 0, 0), 1.0 - maskColor.r);
}