shaders: add skia shaders

Add shaders extracted from skia's unit tests[1]

[1] https://skia.org/dev/testing/testing

1 files changed, 131 insertions, 0 deletions

diff --git a/shaders/skia/22-86.shader_test b/shaders/skia/22-86.shader_test
new file mode 100644
index 0000000..876c3e3
--- /dev/null
+++ b/shaders/skia/22-86.shader_test
@@ -0,0 +1,131 @@
+[require]
+GLSL >= 1.40
+
+[fragment shader]
+#version 140
+
+out vec4 sk_FragColor;
+uniform vec2 ufocalParams_Stage1_c0_c0_c0_c0;
+uniform vec4 uscale0_1_Stage1_c0_c0_c1_c0;
+uniform vec4 uscale2_3_Stage1_c0_c0_c1_c0;
+uniform vec4 uscale4_5_Stage1_c0_c0_c1_c0;
+uniform vec4 ubias0_1_Stage1_c0_c0_c1_c0;
+uniform vec4 ubias2_3_Stage1_c0_c0_c1_c0;
+uniform vec4 ubias4_5_Stage1_c0_c0_c1_c0;
+uniform vec4 uthresholds1_7_Stage1_c0_c0_c1_c0;
+uniform vec4 uthresholds9_13_Stage1_c0_c0_c1_c0;
+noperspective in vec2 vTransformedCoords_0_Stage0;
+noperspective in vec2 vTransformedCoords_1_Stage0;
+flat in vec4 vcolor_Stage0;
+vec4 TwoPointConicalGradientLayout_Stage1_c0_c0_c0_c0(vec4 _input) {
+    vec4 _output;
+    vec2 p = vTransformedCoords_0_Stage0;
+    float t = -1.0;
+    float v = 1.0;
+    {
+        {
+            float invR1 = ufocalParams_Stage1_c0_c0_c0_c0.x;
+            float x_t = -1.0;
+            {
+                float temp = p.x * p.x - p.y * p.y;
+                if (temp >= 0.0) {
+                    {
+                        x_t = sqrt(temp) - p.x * invR1;
+                    }
+                }
+            }
+            {
+                if (x_t <= 0.0) {
+                    v = -1.0;
+                }
+            }
+            {
+                {
+                    t = x_t;
+                }
+            }
+        }
+    }
+    _output = vec4(t, v, 0.0, 0.0);
+    return _output;
+}
+vec4 UnrolledBinaryGradientColorizer_Stage1_c0_c0_c1_c0(vec4 _input) {
+    vec4 _output;
+    float t = _input.x;
+    vec4 scale, bias;
+    {
+        if (t < uthresholds1_7_Stage1_c0_c0_c1_c0.y) {
+            if (t < uthresholds1_7_Stage1_c0_c0_c1_c0.x) {
+                scale = uscale0_1_Stage1_c0_c0_c1_c0;
+                bias = ubias0_1_Stage1_c0_c0_c1_c0;
+            } else {
+                scale = uscale2_3_Stage1_c0_c0_c1_c0;
+                bias = ubias2_3_Stage1_c0_c0_c1_c0;
+            }
+        } else {
+            {
+                scale = uscale4_5_Stage1_c0_c0_c1_c0;
+                bias = ubias4_5_Stage1_c0_c0_c1_c0;
+            }
+        }
+    }
+    _output = t * scale + bias;
+    return _output;
+}
+vec4 TiledGradientEffect_Stage1_c0_c0(vec4 _input) {
+    vec4 _output;
+    vec4 t = TwoPointConicalGradientLayout_Stage1_c0_c0_c0_c0(vec4(1.0));
+    if (t.y < 0.0) {
+        _output = vec4(0.0);
+    } else {
+        {
+            float t_1 = t.x - 1.0;
+            float tiled_t = (t_1 - 2.0 * floor(t_1 * 0.5)) - 1.0;
+            t.x = abs(tiled_t);
+        }
+        _output = UnrolledBinaryGradientColorizer_Stage1_c0_c0_c1_c0(t);
+    }
+    return _output;
+}
+void main() {
+    vec4 output_Stage1;
+    {
+        output_Stage1 = TiledGradientEffect_Stage1_c0_c0(vec4(1.0, 1.0, 1.0, 1.0));
+    }
+    vec4 output_Stage2;
+    {
+        output_Stage2 = output_Stage1;
+        float value;
+        {
+            uint x = uint(vTransformedCoords_1_Stage0.x);
+            uint y = uint(vTransformedCoords_1_Stage0.y);
+            uint m = (((((y & 1u) << 5u | (x & 1u) << 4u) | (y & 2u) << 2u) | (x & 2u) << 1u) | (y & 4u) >> 1u) | (x & 4u) >> 2u;
+            value = float(m) / 64.0 - 0.4921875;
+        }
+        output_Stage2 = vec4(clamp(output_Stage2.xyz + value * 0.0039215688593685627, 0.0, output_Stage2.w), output_Stage2.w);
+    }
+    {
+        sk_FragColor = output_Stage2;
+    }
+}
+
+[vertex shader]
+#version 140
+
+uniform vec4 sk_RTAdjust;
+uniform mat3 uCoordTransformMatrix_0_Stage0;
+uniform mat3 uCoordTransformMatrix_1_Stage0;
+in vec2 position;
+in vec4 color;
+in vec2 localCoord;
+noperspective out vec2 vTransformedCoords_0_Stage0;
+noperspective out vec2 vTransformedCoords_1_Stage0;
+flat out vec4 vcolor_Stage0;
+void main() {
+    vTransformedCoords_0_Stage0 = (uCoordTransformMatrix_0_Stage0 * vec3(localCoord, 1.0)).xy;
+    vTransformedCoords_1_Stage0 = (uCoordTransformMatrix_1_Stage0 * vec3(localCoord, 1.0)).xy;
+    vcolor_Stage0 = color;
+    gl_Position = vec4(position.x, position.y, 0.0, 1.0);
+    gl_Position = vec4(gl_Position.xy * sk_RTAdjust.xz + gl_Position.ww * sk_RTAdjust.yw, 0.0, gl_Position.w);
+}
+