Merge pull request #46 from rz5/master

(misc) Translated natural-vision.cg to slang

misc/natural-vision.slang

@@ -0,0 +1,74 @@
+#version 450
+
+/*
+   ShadX's Natural Vision Shader
+
+   Ported and tweaked by Hyllian - 2016
+   parameterized by Sp00kyFox
+
+*/
+
+layout(std140, set = 0, binding = 0) uniform UBO
+{
+    mat4 MVP;
+} global;
+
+layout(push_constant) uniform push_constant
+{
+    vec4 SourceSize;
+    vec4 OutputSize;
+    float GIN;
+    float GOUT;
+    float Y;
+    float I;
+    float Q;
+} params;
+
+#pragma parameter GIN   "NaturalVision Gamma In"    2.2 0.0 10.0 0.05
+#pragma parameter GOUT  "NaturalVision Gamma Out"   2.2 0.0 10.0 0.05
+#pragma parameter Y "NaturalVision Luminance"   1.1 0.0 10.0 0.01
+#pragma parameter I "NaturalVision Orange-Cyan" 1.1 0.0 10.0 0.01
+#pragma parameter Q "NaturalVision Magenta-Green"   1.1 0.0 10.0 0.01
+
+#pragma stage vertex
+layout(location = 0) in vec4 Position;
+layout(location = 1) in vec2 TexCoord;
+layout(location = 0) out vec2 vTexCoord;
+
+/*    VERTEX_SHADER    */
+void main()
+{
+    gl_Position = global.MVP * Position;
+    vTexCoord   = TexCoord;
+}
+
+#pragma stage fragment
+layout(location = 0) in vec2 vTexCoord;
+layout(location = 0) out vec4 FragColor;
+layout(set = 0, binding = 2) uniform sampler2D Source;
+
+const mat3x3 RGBtoYIQ = mat3x3( 0.299,     0.587,     0.114,
+                                0.595716, -0.274453, -0.321263,
+                                0.211456, -0.522591,  0.311135);
+
+const mat3x3 YIQtoRGB = mat3x3( 1,  0.95629572,  0.62102442,
+                                1, -0.27212210, -0.64738060,
+                                1, -1.10698902,  1.70461500);
+
+const vec3 YIQ_lo = vec3(0, -0.595716, -0.522591);
+const vec3 YIQ_hi = vec3(1,  0.595716,  0.522591);
+
+
+void main()
+{
+    vec3 c = texture(Source, vTexCoord).xyz;
+
+    c = pow(c, vec3(params.GIN));
+    c = c * RGBtoYIQ;
+    c = vec3(pow(c.x, params.Y), c.y*params.I, c.z*params.Q);
+    c = clamp(c, YIQ_lo, YIQ_hi);
+    c = c * YIQtoRGB;
+    c = pow(c, vec3(1.0/params.GOUT));
+
+    FragColor = vec4(c, 1.0);
+}