1 files changed, 67 insertions, 0 deletions
diff --git a/src/com/android/gallery3d/filtershow/filters/convolve3x3.rs b/src/com/android/gallery3d/filtershow/filters/convolve3x3.rs
new file mode 100644
index 000000000..2acffab06
--- /dev/null
+++ b/src/com/android/gallery3d/filtershow/filters/convolve3x3.rs
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * 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)
+#pragma rs_fp_relaxed
+
+int32_t gWidth;
+int32_t gHeight;
+const uchar4 *gPixels;
+rs_allocation gIn;
+
+float gCoeffs[9];
+
+void root(const uchar4 *in, uchar4 *out, const void *usrData, uint32_t x, uint32_t y) {
+    uint32_t x1 = min((int32_t)x+1, gWidth-1);
+    uint32_t x2 = max((int32_t)x-1, 0);
+    uint32_t y1 = min((int32_t)y+1, gHeight-1);
+    uint32_t y2 = max((int32_t)y-1, 0);
+
+    float4 p00 = rsUnpackColor8888(gPixels[x1 + gWidth * y1]);
+    float4 p01 = rsUnpackColor8888(gPixels[x + gWidth * y1]);
+    float4 p02 = rsUnpackColor8888(gPixels[x2 + gWidth * y1]);
+    float4 p10 = rsUnpackColor8888(gPixels[x1 + gWidth * y]);
+    float4 p11 = rsUnpackColor8888(gPixels[x + gWidth * y]);
+    float4 p12 = rsUnpackColor8888(gPixels[x2 + gWidth * y]);
+    float4 p20 = rsUnpackColor8888(gPixels[x1 + gWidth * y2]);
+    float4 p21 = rsUnpackColor8888(gPixels[x + gWidth * y2]);
+    float4 p22 = rsUnpackColor8888(gPixels[x2 + gWidth * y2]);
+
+    p00 *= gCoeffs[0];
+    p01 *= gCoeffs[1];
+    p02 *= gCoeffs[2];
+    p10 *= gCoeffs[3];
+    p11 *= gCoeffs[4];
+    p12 *= gCoeffs[5];
+    p20 *= gCoeffs[6];
+    p21 *= gCoeffs[7];
+    p22 *= gCoeffs[8];
+
+    p00 += p01;
+    p02 += p10;
+    p11 += p12;
+    p20 += p21;
+
+    p22 += p00;
+    p02 += p11;
+
+    p20 += p22;
+    p20 += p02;
+
+    p20 = clamp(p20, 0.f, 1.f);
+    *out = rsPackColorTo8888(p20.r, p20.g, p20.b);
+}