diff options
Diffstat (limited to 'jni/filters/gradient.c')
-rw-r--r-- | jni/filters/gradient.c | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/jni/filters/gradient.c b/jni/filters/gradient.c new file mode 100644 index 000000000..1a8569786 --- /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); +} + |