forked from AuroraMiddleware/gtk
63 lines
1.3 KiB
GLSL
63 lines
1.3 KiB
GLSL
vec3 BlendMultiply(vec3 Cb, vec3 Cs) {
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return Cb * Cs;
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}
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vec3 BlendScreen(vec3 Cb, vec3 Cs) {
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return Cb + Cs - (Cb * Cs);
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}
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vec3 BlendHardLight(vec3 Cb, vec3 Cs) {
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vec3 m = BlendMultiply(Cb, 2.0 * Cs);
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vec3 s = BlendScreen(Cb, 2.0 * Cs - 1.0);
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vec3 edge = vec3(0.5, 0.5, 0.5);
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/* Use mix() and step() to avoid a branch */
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return mix(m, s, step(edge, Cs));
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}
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vec3 BlendOverlay(vec3 Cb, vec3 Cs) {
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return BlendHardLight(Cs, Cb);
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}
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vec3 BlendDarken(vec3 Cb, vec3 Cs) {
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return min(Cb, Cs);
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}
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vec3 BlendLighten(vec3 Cb, vec3 Cs) {
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return max(Cb, Cs);
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}
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void main() {
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vec4 Cb = Texture(parentMap, vUv);
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vec4 Cs = Texture(map, vUv);
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vec3 res;
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if (blendMode == 0) {
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res = Cs.xyz;
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}
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else if (blendMode == 1) {
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res = BlendMultiply(Cb.xyz, Cs.xyz);
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}
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else if (blendMode == 2) {
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res = BlendScreen(Cb.xyz, Cs.xyz);
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}
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else if (blendMode == 3) {
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res = BlendOverlay(Cb.xyz, Cs.xyz);
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}
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else if (blendMode == 4) {
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res = BlendDarken(Cb.xyz, Cs.xyz);
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}
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else if (blendMode == 5) {
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res = BlendLighten(Cb.xyz, Cs.xyz);
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}
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else if (blendMode == 8) {
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res = BlendHardLight(Cb.xyz, Cs.xyz);
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}
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else {
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// Use red for debugging missing blend modes
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res = vec3(1.0, 0.0, 0.0);
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}
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setOutputColor(vec4(res, Cs.a * alpha));
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}
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