| /* |
| * 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); |
| } |
| |