1 files changed, 78 insertions, 0 deletions
diff --git a/src/com/android/gallery3d/filtershow/filters/vignette.rs b/src/com/android/gallery3d/filtershow/filters/vignette.rs
new file mode 100644
index 000000000..709b220e4
--- /dev/null
+++ b/src/com/android/gallery3d/filtershow/filters/vignette.rs
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2013 Unknown
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma version(1)
+#pragma rs java_package_name(com.android.gallery3d.filtershow.filters)
+
+uint32_t inputWidth;
+uint32_t inputHeight;
+float centerx;
+float centery;
+float radiusx;
+float radiusy;
+float strength;
+float finalBright;
+float finalSaturation;
+float finalContrast;
+float finalSubtract;
+rs_matrix3x3 colorMatrix;
+float scalex;
+float scaley;
+float offset;
+static const float Rf = 0.2999f;
+static const float Gf = 0.587f;
+static const float Bf = 0.114f;
+
+
+void setupVignetteParams() {
+    int k = 0;
+
+    scalex = 1.f / radiusx;
+    scaley = 1.f / radiusy;
+
+    float S = 1 + finalSaturation / 100.f;
+    float MS = 1 - S;
+    float Rt = Rf * MS;
+    float Gt = Gf * MS;
+    float Bt = Bf * MS;
+
+    float b = 1 + finalBright / 100.f;
+    float c = 1 + finalContrast / 100.f;
+    b *= c;
+    offset = .5f - c / 2.f - finalSubtract / 100.f;
+    rsMatrixSet(&colorMatrix, 0, 0, b * (Rt + S));
+    rsMatrixSet(&colorMatrix, 1, 0, b * Gt);
+    rsMatrixSet(&colorMatrix, 2, 0, b * Bt);
+    rsMatrixSet(&colorMatrix, 0, 1, b * Rt);
+    rsMatrixSet(&colorMatrix, 1, 1, b * (Gt + S));
+    rsMatrixSet(&colorMatrix, 2, 1, b * Bt);
+    rsMatrixSet(&colorMatrix, 0, 2, b * Rt);
+    rsMatrixSet(&colorMatrix, 1, 2, b * Gt);
+    rsMatrixSet(&colorMatrix, 2, 2, b * (Bt + S));
+}
+
+uchar4 __attribute__((kernel)) vignette(const uchar4 in, uint32_t x,  uint32_t y) {
+    float4 pixel = rsUnpackColor8888(in);
+    float radx = (x - centerx) * scalex;
+    float rady = (y - centery) * scaley;
+    float dist = strength * (sqrt(radx * radx + rady * rady) - 1.f);
+    float t  =  (1.f + dist / sqrt(1.f + dist* dist)) * .5f;
+    float4 wsum = pixel;
+    wsum.xyz = wsum.xyz * (1 - t) + t * (rsMatrixMultiply(&colorMatrix, wsum.xyz) + offset);
+    wsum.a = 1.0f;
+    uchar4 out = rsPackColorTo8888(clamp(wsum, 0.f, 1.0f));
+    return out;
+}
+\ No newline at end of file