luboslenco
103 lines
2.7 KiB
Plaintext
103 lines
2.7 KiB
Plaintext
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#[set(everything)]
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const constants: {
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opac: float;
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blending: int;
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};
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#[set(everything)]
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const sampler_linear: sampler;
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#[set(everything)]
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const tex0: tex2d;
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#[set(everything)]
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const texa: tex2d;
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struct vert_in {
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pos: float2;
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}
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struct vert_out {
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pos: float4;
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tex: float2;
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}
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fun mask_merge_vert(input: vert_in): vert_out {
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var output: vert_out;
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output.tex = input.pos.xy * 0.5 + 0.5;
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output.tex.y = 1.0 - output.tex.y;
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output.pos = float4(input.pos.xy, 0.0, 1.0);
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return output;
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}
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fun mask_merge_frag(input: vert_out): float4 {
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var col0: float = sample_lod(tex0, sampler_linear, input.tex, 0.0).r;
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var cola: float = sample_lod(texa, sampler_linear, input.tex, 0.0).r;
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var str: float = constants.opac;
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var out_color: float = 0.0;
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if (constants.blending == 0) { // Mix
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out_color = lerp(cola, col0, str);
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}
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/*else*/ if (constants.blending == 1) { // Darken
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out_color = lerp(cola, min(cola, col0), str);
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}
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/*else*/ if (constants.blending == 2) { // Multiply
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out_color = lerp(cola, cola * col0, str);
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}
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/*else*/ if (constants.blending == 3) { // Burn
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out_color = lerp(cola, 1.0 - (1.0 - cola) / col0, str);
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}
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/*else*/ if (constants.blending == 4) { // Lighten
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out_color = max(cola, col0 * str);
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}
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/*else*/ if (constants.blending == 5) { // Screen
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out_color = (1.0 - ((1.0 - str) + str * (1.0 - col0)) * (1.0 - cola));
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}
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/*else*/ if (constants.blending == 6) { // Dodge
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out_color = lerp(cola, cola / (1.0 - col0), str);
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}
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/*else*/ if (constants.blending == 7) { // Add
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out_color = lerp(cola, cola + col0, str);
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}
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/*else*/ if (constants.blending == 8) { // Overlay
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// out_color = lerp(cola, cola < 0.5 ? 2.0 * cola * col0 : 1.0 - 2.0 * (1.0 - cola) * (1.0 - col0), str);
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////
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//if (cola < 0.5) {
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out_color = lerp(cola, 2.0 * cola * col0, str);
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//}
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//else {
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// out_color = lerp(cola, 1.0 - 2.0 * (1.0 - cola) * (1.0 - col0), str);
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//}
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////
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}
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/*else*/ if (constants.blending == 9) { // Soft Light
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out_color = ((1.0 - str) * cola + str * ((1.0 - cola) * col0 * cola + cola * (1.0 - (1.0 - col0) * (1.0 - cola))));
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}
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/*else*/ if (constants.blending == 10) { // Linear Light
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out_color = (cola + str * (2.0 * (col0 - 0.5)));
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}
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/*else*/ if (constants.blending == 11) { // Difference
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out_color = lerp(cola, abs(cola - col0), str);
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}
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/*else*/ if (constants.blending == 12) { // Subtract
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out_color = lerp(cola, cola - col0, str);
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}
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/*else*/ if (constants.blending == 13) { // Divide
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out_color = (1.0 - str) * cola + str * cola / col0;
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}
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/*else*/ if (constants.blending == 14) { // Hue, Saturation, Color, Value
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out_color = lerp(cola, col0, str);
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}
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return float4(out_color, out_color, out_color, 1.0);
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}
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#[pipe]
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struct pipe {
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vertex = mask_merge_vert;
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fragment = mask_merge_frag;
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}
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