shaders: add skia shaders

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

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

1 files changed, 219 insertions, 0 deletions

diff --git a/shaders/skia/325-3.shader_test b/shaders/skia/325-3.shader_test
new file mode 100644
index 0000000..d1d452a
--- /dev/null
+++ b/shaders/skia/325-3.shader_test
@@ -0,0 +1,219 @@
+[require]
+GLSL >= 1.40
+
+[fragment shader]
+#version 140
+
+out vec4 sk_FragColor;
+uniform vec4 uboundsUniform_Stage1;
+uniform float uxInvZoom_Stage1;
+uniform float uyInvZoom_Stage1;
+uniform float uxInvInset_Stage1;
+uniform float uyInvInset_Stage1;
+uniform vec2 uoffset_Stage1;
+uniform vec4 uscale0_1_Stage2_c0_c0_c1_c0;
+uniform vec4 uscale2_3_Stage2_c0_c0_c1_c0;
+uniform vec4 uscale4_5_Stage2_c0_c0_c1_c0;
+uniform vec4 ubias0_1_Stage2_c0_c0_c1_c0;
+uniform vec4 ubias2_3_Stage2_c0_c0_c1_c0;
+uniform vec4 ubias4_5_Stage2_c0_c0_c1_c0;
+uniform vec4 uthresholds1_7_Stage2_c0_c0_c1_c0;
+uniform vec4 uthresholds9_13_Stage2_c0_c0_c1_c0;
+uniform vec4 uleftBorderColor_Stage3_c1_c0;
+uniform vec4 urightBorderColor_Stage3_c1_c0;
+uniform vec4 uscale0_1_Stage3_c1_c0_c1_c0;
+uniform vec4 uscale2_3_Stage3_c1_c0_c1_c0;
+uniform vec4 uscale4_5_Stage3_c1_c0_c1_c0;
+uniform vec4 uscale6_7_Stage3_c1_c0_c1_c0;
+uniform vec4 ubias0_1_Stage3_c1_c0_c1_c0;
+uniform vec4 ubias2_3_Stage3_c1_c0_c1_c0;
+uniform vec4 ubias4_5_Stage3_c1_c0_c1_c0;
+uniform vec4 ubias6_7_Stage3_c1_c0_c1_c0;
+uniform vec4 uthresholds1_7_Stage3_c1_c0_c1_c0;
+uniform vec4 uthresholds9_13_Stage3_c1_c0_c1_c0;
+uniform vec2 uDstTextureUpperLeft_Stage6;
+uniform vec2 uDstTextureCoordScale_Stage6;
+uniform sampler2D uTextureSampler_0_Stage1;
+uniform sampler2D uDstTextureSampler_Stage6;
+noperspective in vec4 vcolor_Stage0;
+noperspective in vec2 vTransformedCoords_0_Stage0;
+noperspective in vec2 vTransformedCoords_1_Stage0;
+noperspective in vec2 vTransformedCoords_2_Stage0;
+vec4 LinearGradientLayout_Stage2_c0_c0_c0_c0(vec4 _input) {
+    vec4 _output;
+    float t = vTransformedCoords_1_Stage0.x + 9.9999997473787516e-06;
+    _output = vec4(t, 1.0, 0.0, 0.0);
+    return _output;
+}
+vec4 UnrolledBinaryGradientColorizer_Stage2_c0_c0_c1_c0(vec4 _input) {
+    vec4 _output;
+    float t = _input.x;
+    vec4 scale, bias;
+    {
+        if (t < uthresholds1_7_Stage2_c0_c0_c1_c0.y) {
+            if (t < uthresholds1_7_Stage2_c0_c0_c1_c0.x) {
+                scale = uscale0_1_Stage2_c0_c0_c1_c0;
+                bias = ubias0_1_Stage2_c0_c0_c1_c0;
+            } else {
+                scale = uscale2_3_Stage2_c0_c0_c1_c0;
+                bias = ubias2_3_Stage2_c0_c0_c1_c0;
+            }
+        } else {
+            {
+                scale = uscale4_5_Stage2_c0_c0_c1_c0;
+                bias = ubias4_5_Stage2_c0_c0_c1_c0;
+            }
+        }
+    }
+    _output = t * scale + bias;
+    return _output;
+}
+vec4 TiledGradientEffect_Stage2_c0_c0(vec4 _input) {
+    vec4 _output;
+    vec4 t = LinearGradientLayout_Stage2_c0_c0_c0_c0(vec4(1.0));
+    {
+        {
+            t.x = fract(t.x);
+        }
+        _output = UnrolledBinaryGradientColorizer_Stage2_c0_c0_c1_c0(t);
+    }
+    {
+        _output.xyz *= _output.w;
+    }
+    return _output;
+}
+vec4 LinearGradientLayout_Stage3_c1_c0_c0_c0(vec4 _input) {
+    vec4 _output;
+    float t = vTransformedCoords_2_Stage0.x + 9.9999997473787516e-06;
+    _output = vec4(t, 1.0, 0.0, 0.0);
+    return _output;
+}
+vec4 UnrolledBinaryGradientColorizer_Stage3_c1_c0_c1_c0(vec4 _input) {
+    vec4 _output;
+    float t = _input.x;
+    vec4 scale, bias;
+    {
+        if (t < uthresholds1_7_Stage3_c1_c0_c1_c0.y) {
+            if (t < uthresholds1_7_Stage3_c1_c0_c1_c0.x) {
+                scale = uscale0_1_Stage3_c1_c0_c1_c0;
+                bias = ubias0_1_Stage3_c1_c0_c1_c0;
+            } else {
+                scale = uscale2_3_Stage3_c1_c0_c1_c0;
+                bias = ubias2_3_Stage3_c1_c0_c1_c0;
+            }
+        } else {
+            if (t < uthresholds1_7_Stage3_c1_c0_c1_c0.z) {
+                scale = uscale4_5_Stage3_c1_c0_c1_c0;
+                bias = ubias4_5_Stage3_c1_c0_c1_c0;
+            } else {
+                scale = uscale6_7_Stage3_c1_c0_c1_c0;
+                bias = ubias6_7_Stage3_c1_c0_c1_c0;
+            }
+        }
+    }
+    _output = t * scale + bias;
+    return _output;
+}
+vec4 ClampedGradientEffect_Stage3_c1_c0(vec4 _input) {
+    vec4 _output;
+    vec4 t = LinearGradientLayout_Stage3_c1_c0_c0_c0(vec4(1.0));
+    if (t.x < 0.0) {
+        _output = uleftBorderColor_Stage3_c1_c0;
+    } else if (t.x > 1.0) {
+        _output = urightBorderColor_Stage3_c1_c0;
+    } else {
+        _output = UnrolledBinaryGradientColorizer_Stage3_c1_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);
+}
+vec4 blend_src_out(vec4 src, vec4 dst) {
+    return (1.0 - dst.w) * src;
+}
+void main() {
+    vec4 output_Stage1;
+    {
+        vec2 coord = vTransformedCoords_0_Stage0;
+        vec2 zoom_coord = uoffset_Stage1 + coord * vec2(uxInvZoom_Stage1, uyInvZoom_Stage1);
+        vec2 delta = (coord - uboundsUniform_Stage1.xy) * uboundsUniform_Stage1.zw;
+        delta = min(delta, vec2(1.0, 1.0) - delta);
+        delta *= vec2(uxInvInset_Stage1, uyInvInset_Stage1);
+        float weight = 0.0;
+        if (delta.x < 2.0 && delta.y < 2.0) {
+            delta = vec2(2.0, 2.0) - delta;
+            float dist = length(delta);
+            dist = max(2.0 - dist, 0.0);
+            weight = min(dist * dist, 1.0);
+        } else {
+            vec2 delta_squared = delta * delta;
+            weight = min(min(delta_squared.x, delta_squared.y), 1.0);
+        }
+        output_Stage1 = texture(uTextureSampler_0_Stage1, mix(coord, zoom_coord, weight));
+    }
+    vec4 output_Stage2;
+    {
+        output_Stage2 = blend_dst_in(output_Stage1, TiledGradientEffect_Stage2_c0_c0(vec4(1.0)));
+    }
+    vec4 output_Stage3;
+    {
+        output_Stage3 = blend_dst_in(output_Stage2, ClampedGradientEffect_Stage3_c1_c0(vec4(1.0)));
+    }
+    vec4 output_Stage4;
+    {
+        output_Stage4 = floor(vec4(255.0) + 0.5) / 255.0;
+        {
+            output_Stage4.xyz = floor((output_Stage4.xyz * output_Stage4.w) * 255.0 + 0.5) / 255.0;
+        }
+    }
+    vec4 output_Stage5;
+    {
+        {
+            float alpha = clamp(output_Stage4.w, 0.0, 1.0);
+            output_Stage5 = vec4(clamp(output_Stage4.xyz, 0.0, alpha), alpha);
+        }
+    }
+    {
+        if (all(lessThanEqual(output_Stage5.xyz, vec3(0.0)))) {
+            discard;
+        }
+        vec2 _dstTexCoord = (gl_FragCoord.xy - uDstTextureUpperLeft_Stage6) * uDstTextureCoordScale_Stage6;
+        vec4 _dstColor = texture(uDstTextureSampler_Stage6, _dstTexCoord);
+        sk_FragColor = blend_src_out(output_Stage3, _dstColor);
+        sk_FragColor = output_Stage5 * sk_FragColor + (vec4(1.0) - output_Stage5) * _dstColor;
+    }
+}
+
+[vertex shader]
+#version 140
+
+uniform vec4 sk_RTAdjust;
+uniform mat3 uViewM_Stage0;
+uniform mat3 uCoordTransformMatrix_0_Stage0;
+uniform mat3 uCoordTransformMatrix_1_Stage0;
+uniform mat3 uCoordTransformMatrix_2_Stage0;
+in vec2 inPosition;
+in vec4 inColor;
+in vec2 inLocalCoord;
+noperspective out vec4 vcolor_Stage0;
+noperspective out vec2 vTransformedCoords_0_Stage0;
+noperspective out vec2 vTransformedCoords_1_Stage0;
+noperspective out vec2 vTransformedCoords_2_Stage0;
+void main() {
+    vec4 color = inColor;
+    vcolor_Stage0 = color;
+    vec2 pos2 = (uViewM_Stage0 * vec3(inPosition, 1.0)).xy;
+    vTransformedCoords_0_Stage0 = (uCoordTransformMatrix_0_Stage0 * vec3(inLocalCoord, 1.0)).xy;
+    vTransformedCoords_1_Stage0 = (uCoordTransformMatrix_1_Stage0 * vec3(inLocalCoord, 1.0)).xy;
+    vTransformedCoords_2_Stage0 = (uCoordTransformMatrix_2_Stage0 * vec3(inLocalCoord, 1.0)).xy;
+    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);
+}
+