shaders: add skia shaders

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

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

1 files changed, 86 insertions, 0 deletions

diff --git a/shaders/skia/1-411.shader_test b/shaders/skia/1-411.shader_test
new file mode 100644
index 0000000..fab82c7
--- /dev/null
+++ b/shaders/skia/1-411.shader_test
@@ -0,0 +1,86 @@
+[require]
+GLSL >= 1.40
+
+[fragment shader]
+#version 140
+
+#extension GL_ARB_fragment_coord_conventions : require
+layout(origin_upper_left) in vec4 gl_FragCoord;
+out vec4 sk_FragColor;
+uniform vec4 uleftBorderColor_Stage1_c0_c0;
+uniform vec4 urightBorderColor_Stage1_c0_c0;
+uniform vec4 ustart_Stage1_c0_c0_c1_c0;
+uniform vec4 uend_Stage1_c0_c0_c1_c0;
+in vec2 vTransformedCoords_0_Stage0;
+flat in vec4 vcolor_Stage0;
+in float vcoverage_Stage0;
+flat in vec4 vgeomDomain_Stage0;
+vec4 LinearGradientLayout_Stage1_c0_c0_c0_c0(vec4 _input) {
+    vec4 _output;
+    float t = vTransformedCoords_0_Stage0.x + 9.9999997473787516e-06;
+    _output = vec4(t, 1.0, 0.0, 0.0);
+    return _output;
+}
+vec4 SingleIntervalGradientColorizer_Stage1_c0_c0_c1_c0(vec4 _input) {
+    vec4 _output;
+    float t = _input.x;
+    _output = (1.0 - t) * ustart_Stage1_c0_c0_c1_c0 + t * uend_Stage1_c0_c0_c1_c0;
+    return _output;
+}
+vec4 ClampedGradientEffect_Stage1_c0_c0(vec4 _input) {
+    vec4 _output;
+    vec4 t = LinearGradientLayout_Stage1_c0_c0_c0_c0(vec4(1.0));
+    if (t.x < 0.0) {
+        _output = uleftBorderColor_Stage1_c0_c0;
+    } else if (t.x > 1.0) {
+        _output = urightBorderColor_Stage1_c0_c0;
+    } else {
+        _output = SingleIntervalGradientColorizer_Stage1_c0_c0_c1_c0(t);
+    }
+    return _output;
+}
+void main() {
+    vec4 outputCoverage_Stage0;
+    {
+        float coverage = vcoverage_Stage0 * gl_FragCoord.w;
+        vec4 geoDomain;
+        geoDomain = vgeomDomain_Stage0;
+        if (coverage < 0.5) {
+            vec4 dists4 = clamp(vec4(1.0, 1.0, -1.0, -1.0) * (gl_FragCoord.xyxy - geoDomain), 0.0, 1.0);
+            vec2 dists2 = dists4.xy * dists4.zw;
+            coverage = min(coverage, dists2.x * dists2.y);
+        }
+        outputCoverage_Stage0 = vec4(coverage);
+    }
+    vec4 output_Stage1;
+    {
+        output_Stage1 = ClampedGradientEffect_Stage1_c0_c0(vec4(1.0, 1.0, 1.0, 1.0));
+    }
+    {
+        sk_FragColor = output_Stage1 * outputCoverage_Stage0;
+    }
+}
+
+[vertex shader]
+#version 140
+
+uniform vec4 sk_RTAdjust;
+uniform mat3 uCoordTransformMatrix_0_Stage0;
+in vec4 positionWithCoverage;
+in vec4 color;
+in vec2 localCoord;
+in vec4 geomDomain;
+out vec2 vTransformedCoords_0_Stage0;
+flat out vec4 vcolor_Stage0;
+out float vcoverage_Stage0;
+flat out vec4 vgeomDomain_Stage0;
+void main() {
+    vec3 position = positionWithCoverage.xyz;
+    vTransformedCoords_0_Stage0 = (uCoordTransformMatrix_0_Stage0 * vec3(localCoord, 1.0)).xy;
+    vcolor_Stage0 = color;
+    vcoverage_Stage0 = positionWithCoverage.w * positionWithCoverage.z;
+    vgeomDomain_Stage0 = geomDomain;
+    gl_Position = vec4(position.x, position.y, 0.0, position.z);
+    gl_Position = vec4(gl_Position.xy * sk_RTAdjust.xz + gl_Position.ww * sk_RTAdjust.yw, 0.0, gl_Position.w);
+}
+