shaders: add skia shaders

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

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

1 files changed, 64 insertions, 0 deletions

diff --git a/shaders/skia/82-4.shader_test b/shaders/skia/82-4.shader_test
new file mode 100644
index 0000000..2a63920
--- /dev/null
+++ b/shaders/skia/82-4.shader_test
@@ -0,0 +1,64 @@
+[require]
+GLSL >= 1.40
+
+[fragment shader]
+#version 140
+
+out vec4 sk_FragColor;
+uniform mat3 ucolorSpaceMatrix_Stage1_c0_c0;
+uniform vec3 ucolorSpaceTranslate_Stage1_c0_c0;
+uniform sampler2D uTextureSampler_0_Stage1;
+uniform sampler2D uTextureSampler_1_Stage1;
+noperspective in vec2 vTransformedCoords_0_Stage0;
+noperspective in vec2 vTransformedCoords_1_Stage0;
+flat in vec4 vcolor_Stage0;
+vec4 TextureEffect_Stage1_c0_c0_c0_c0(vec4 _input) {
+    vec4 _output;
+    _output = texture(uTextureSampler_0_Stage1, vTransformedCoords_0_Stage0) * _input;
+    return _output;
+}
+vec4 TextureEffect_Stage1_c0_c0_c1_c0(vec4 _input) {
+    vec4 _output;
+    _output = texture(uTextureSampler_1_Stage1, vTransformedCoords_1_Stage0) * _input;
+    return _output;
+}
+vec4 YUVtoRGBEffect_Stage1_c0_c0(vec4 _input) {
+    vec4 _output;
+    vec4 planes[2];
+    planes[0] = TextureEffect_Stage1_c0_c0_c0_c0(vec4(1.0));
+    planes[1] = TextureEffect_Stage1_c0_c0_c1_c0(vec4(1.0));
+    vec4 color = vec4(planes[0].w, planes[1].x, planes[1].y, 1.0);
+    color.xyz = clamp(color.xyz * ucolorSpaceMatrix_Stage1_c0_c0 + ucolorSpaceTranslate_Stage1_c0_c0, 0.0, 1.0);
+    _output = color;
+    return _output;
+}
+void main() {
+    vec4 output_Stage1;
+    {
+        output_Stage1 = YUVtoRGBEffect_Stage1_c0_c0(vec4(1.0, 1.0, 1.0, 1.0));
+    }
+    {
+        sk_FragColor = output_Stage1;
+    }
+}
+
+[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);
+}
+