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-rw-r--r--jni/filters/gradient.c65
1 files changed, 65 insertions, 0 deletions
diff --git a/jni/filters/gradient.c b/jni/filters/gradient.c
new file mode 100644
index 0000000..1a85697
--- /dev/null
+++ b/jni/filters/gradient.c
@@ -0,0 +1,65 @@
+/*
+ * 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.
+ */
+
+#include "filters.h"
+
+void JNIFUNCF(ImageFilter, nativeApplyGradientFilter, jobject bitmap, jint width, jint height,
+ jintArray redGradient, jintArray greenGradient, jintArray blueGradient)
+{
+ char* destination = 0;
+ jint* redGradientArray = 0;
+ jint* greenGradientArray = 0;
+ jint* blueGradientArray = 0;
+ if (redGradient)
+ redGradientArray = (*env)->GetIntArrayElements(env, redGradient, NULL);
+ if (greenGradient)
+ greenGradientArray = (*env)->GetIntArrayElements(env, greenGradient, NULL);
+ if (blueGradient)
+ blueGradientArray = (*env)->GetIntArrayElements(env, blueGradient, NULL);
+
+ AndroidBitmap_lockPixels(env, bitmap, (void**) &destination);
+ int i;
+ int len = width * height * 4;
+ for (i = 0; i < len; i+=4)
+ {
+ if (redGradient)
+ {
+ int r = destination[RED];
+ r = redGradientArray[r];
+ destination[RED] = r;
+ }
+ if (greenGradient)
+ {
+ int g = destination[GREEN];
+ g = greenGradientArray[g];
+ destination[GREEN] = g;
+ }
+ if (blueGradient)
+ {
+ int b = destination[BLUE];
+ b = blueGradientArray[b];
+ destination[BLUE] = b;
+ }
+ }
+ if (redGradient)
+ (*env)->ReleaseIntArrayElements(env, redGradient, redGradientArray, 0);
+ if (greenGradient)
+ (*env)->ReleaseIntArrayElements(env, greenGradient, greenGradientArray, 0);
+ if (blueGradient)
+ (*env)->ReleaseIntArrayElements(env, blueGradient, blueGradientArray, 0);
+ AndroidBitmap_unlockPixels(env, bitmap);
+}
+