shaders: add skia shaders

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

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

1 files changed, 106 insertions, 0 deletions

diff --git a/shaders/skia/940-1.shader_test b/shaders/skia/940-1.shader_test
new file mode 100644
index 0000000..52c022d
--- /dev/null
+++ b/shaders/skia/940-1.shader_test
@@ -0,0 +1,106 @@
+[require]
+GLSL >= 1.40
+
+[fragment shader]
+#version 140
+
+out vec4 sk_FragColor;
+uniform vec2 ufocalParams_Stage2_c0_c0_c0_c0;
+uniform vec4 uscale01_Stage2_c0_c0_c1_c0;
+uniform vec4 ubias01_Stage2_c0_c0_c1_c0;
+uniform vec4 uscale23_Stage2_c0_c0_c1_c0;
+uniform vec4 ubias23_Stage2_c0_c0_c1_c0;
+uniform float uthreshold_Stage2_c0_c0_c1_c0;
+uniform sampler2D uTextureSampler_0_Stage1;
+noperspective in vec2 vTransformedCoords_0_Stage0;
+noperspective in vec2 vTransformedCoords_1_Stage0;
+vec4 TwoPointConicalGradientLayout_Stage2_c0_c0_c0_c0(vec4 _input) {
+    vec4 _output;
+    vec2 p = vTransformedCoords_1_Stage0;
+    float t = -1.0;
+    {
+        {
+            float invR1 = ufocalParams_Stage2_c0_c0_c0_c0.x;
+            float x_t = -1.0;
+            {
+                x_t = length(p) - p.x * invR1;
+            }
+            {
+                {
+                    t = x_t;
+                }
+            }
+        }
+    }
+    _output = vec4(t, 1.0, 0.0, 0.0);
+    return _output;
+}
+vec4 DualIntervalGradientColorizer_Stage2_c0_c0_c1_c0(vec4 _input) {
+    vec4 _output;
+    float t = _input.x;
+    vec4 scale, bias;
+    if (t < uthreshold_Stage2_c0_c0_c1_c0) {
+        scale = uscale01_Stage2_c0_c0_c1_c0;
+        bias = ubias01_Stage2_c0_c0_c1_c0;
+    } else {
+        scale = uscale23_Stage2_c0_c0_c1_c0;
+        bias = ubias23_Stage2_c0_c0_c1_c0;
+    }
+    _output = t * scale + bias;
+    return _output;
+}
+vec4 TiledGradientEffect_Stage2_c0_c0(vec4 _input) {
+    vec4 _output;
+    vec4 t = TwoPointConicalGradientLayout_Stage2_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 = DualIntervalGradientColorizer_Stage2_c0_c0_c1_c0(t);
+    }
+    {
+        _output.xyz *= _output.w;
+    }
+    return _output;
+}
+vec4 blend_src_in(vec4 src, vec4 dst) {
+    return src * dst.w;
+}
+vec4 blend_dst_in(vec4 src, vec4 dst) {
+    return blend_src_in(dst, src);
+}
+void main() {
+    vec4 output_Stage1;
+    {
+        output_Stage1 = texture(uTextureSampler_0_Stage1, vTransformedCoords_0_Stage0);
+    }
+    vec4 output_Stage2;
+    {
+        output_Stage2 = blend_dst_in(output_Stage1, TiledGradientEffect_Stage2_c0_c0(vec4(1.0)));
+    }
+    {
+        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 vec2 localCoord;
+noperspective out vec2 vTransformedCoords_0_Stage0;
+noperspective out vec2 vTransformedCoords_1_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;
+    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);
+}
+