1 files changed, 121 insertions, 0 deletions
diff --git a/src/com/android/gallery3d/filtershow/filters/grad.rs b/src/com/android/gallery3d/filtershow/filters/grad.rs
new file mode 100644
index 000000000..ddbafd349
--- /dev/null
+++ b/src/com/android/gallery3d/filtershow/filters/grad.rs
@@ -0,0 +1,121 @@
+/*
+ * Copyright (C) 2012 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)
+
+#define MAX_POINTS 16
+
+uint32_t inputWidth;
+uint32_t inputHeight;
+static const float Rf = 0.2999f;
+static const float Gf = 0.587f;
+static const float Bf = 0.114f;
+//static const float size_scale = 0.01f;
+
+typedef struct {
+    rs_matrix3x3 colorMatrix;
+    float rgbOff;
+    float dx;
+    float dy;
+    float off;
+} UPointData;
+int mNumberOfLines;
+// input data
+bool mask[MAX_POINTS];
+int xPos1[MAX_POINTS];
+int yPos1[MAX_POINTS];
+int xPos2[MAX_POINTS];
+int yPos2[MAX_POINTS];
+int size[MAX_POINTS];
+int brightness[MAX_POINTS];
+int contrast[MAX_POINTS];
+int saturation[MAX_POINTS];
+
+// generated data
+static UPointData grads[MAX_POINTS];
+
+void setupGradParams() {
+    int k = 0;
+    for (int i = 0; i < MAX_POINTS; i++) {
+      if (!mask[i]) {
+         continue;
+      }
+      float x1 = xPos1[i];
+      float y1 = yPos1[i];
+      float x2 = xPos2[i];
+      float y2 = yPos2[i];
+
+      float denom = (y2 * y2 - 2 * y1 * y2 + x2 * x2 - 2 * x1 * x2 + y1 * y1 + x1 * x1);
+      if (denom == 0) {
+         continue;
+      }
+      grads[k].dy = (y1 - y2) / denom;
+      grads[k].dx = (x1 - x2) / denom;
+      grads[k].off = (y2 * y2 + x2 * x2 - x1 * x2 - y1 * y2) / denom;
+
+      float S = 1+saturation[i]/100.f;
+      float MS = 1-S;
+      float Rt = Rf * MS;
+      float Gt = Gf * MS;
+      float Bt = Bf * MS;
+
+      float b = 1+brightness[i]/100.f;
+      float c = 1+contrast[i]/100.f;
+      b *= c;
+      grads[k].rgbOff = .5f - c/2.f;
+      rsMatrixSet(&grads[i].colorMatrix, 0, 0, b * (Rt + S));
+      rsMatrixSet(&grads[i].colorMatrix, 1, 0, b * Gt);
+      rsMatrixSet(&grads[i].colorMatrix, 2, 0, b * Bt);
+      rsMatrixSet(&grads[i].colorMatrix, 0, 1, b * Rt);
+      rsMatrixSet(&grads[i].colorMatrix, 1, 1, b * (Gt + S));
+      rsMatrixSet(&grads[i].colorMatrix, 2, 1, b * Bt);
+      rsMatrixSet(&grads[i].colorMatrix, 0, 2, b * Rt);
+      rsMatrixSet(&grads[i].colorMatrix, 1, 2, b * Gt);
+      rsMatrixSet(&grads[i].colorMatrix, 2, 2, b * (Bt + S));
+
+      k++;
+    }
+    mNumberOfLines = k;
+}
+
+void init() {
+
+}
+
+uchar4 __attribute__((kernel)) selectiveAdjust(const uchar4 in, uint32_t x,
+    uint32_t y) {
+    float4 pixel = rsUnpackColor8888(in);
+
+    float4 wsum = pixel;
+    wsum.a = 0.f;
+    for (int i = 0; i < mNumberOfLines; i++) {
+        UPointData* grad = &grads[i];
+        float t = clamp(x*grad->dx+y*grad->dy+grad->off,0.f,1.0f);
+        wsum.xyz = wsum.xyz*(1-t)+
+            t*(rsMatrixMultiply(&grad->colorMatrix ,wsum.xyz)+grad->rgbOff);
+
+    }
+
+    pixel.rgb = wsum.rgb;
+    pixel.a = 1.0f;
+
+    uchar4 out = rsPackColorTo8888(clamp(pixel, 0.f, 1.0f));
+    return out;
+}
+
+
+