shaders: add skia shaders

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

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

1 files changed, 38 insertions, 0 deletions

diff --git a/shaders/skia/139-11.shader_test b/shaders/skia/139-11.shader_test
new file mode 100644
index 0000000..f5464a9
--- /dev/null
+++ b/shaders/skia/139-11.shader_test
@@ -0,0 +1,38 @@
+[require]
+GLSL >= 1.40
+
+[fragment shader]
+#version 140
+
+noperspective in vec2 vEllipseOffsets_Stage0;
+noperspective in vec4 vEllipseRadii_Stage0;
+noperspective in vec4 vinColor_Stage0;
+void main() {
+    {
+        vec2 offset = vEllipseOffsets_Stage0;
+        vec2 grad = (2.0 * offset) * vEllipseRadii_Stage0.xy;
+        float grad_dot = dot(grad, grad);
+        grad_dot = max(grad_dot, 1.1754999560161448e-38);
+    }
+}
+
+[vertex shader]
+#version 140
+
+uniform vec4 sk_RTAdjust;
+in vec2 inPosition;
+in vec4 inColor;
+in vec2 inEllipseOffset;
+in vec4 inEllipseRadii;
+noperspective out vec2 vEllipseOffsets_Stage0;
+noperspective out vec4 vEllipseRadii_Stage0;
+noperspective out vec4 vinColor_Stage0;
+void main() {
+    vEllipseOffsets_Stage0 = inEllipseOffset;
+    vEllipseRadii_Stage0 = inEllipseRadii;
+    vinColor_Stage0 = inColor;
+    vec2 pos2 = inPosition;
+    gl_Position = vec4(pos2.x, pos2.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);
+}
+