1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include <android/bitmap.h> 18 #include <jni.h> 19 20 #include "utils.h" 21 #include "_jni.h" 22 23 using android::apps::photoeditor::utils::LockBitmaps; 24 using android::apps::photoeditor::utils::pixel32_t; 25 using android::apps::photoeditor::utils::UnlockBitmaps; 26 27 namespace { 28 29 extern "C" JNIEXPORT void JNICALL Java_com_android_photoeditor_filters_ImageUtils_nativeNegative( 30 JNIEnv *env, jobject obj, jobject src_bitmap, jobject dst_bitmap) { 31 pNegativeType f = (pNegativeType)JNIFunc[JNI_Negative].func_ptr; 32 return f(env, obj, src_bitmap, dst_bitmap); 33 } 34 35 extern "C" void Negative( 36 JNIEnv *env, jobject obj, jobject src_bitmap, jobject dst_bitmap) { 37 AndroidBitmapInfo src_info; 38 AndroidBitmapInfo dst_info; 39 void* src_pixels; 40 void* dst_pixels; 41 42 int ret = LockBitmaps( 43 env, src_bitmap, dst_bitmap, &src_info, &dst_info, &src_pixels, &dst_pixels); 44 if (ret < 0) { 45 LOGE("LockBitmaps in Negative failed, error=%d", ret); 46 return; 47 } 48 49 for (uint32_t scan_line = 0; scan_line < dst_info.height; scan_line++) { 50 uint32_t* dst = reinterpret_cast<uint32_t*>(dst_pixels); 51 pixel32_t* src = reinterpret_cast<pixel32_t*>(src_pixels); 52 pixel32_t* src_line_end = src + src_info.width; 53 54 while (src < src_line_end) { 55 uint32_t dst_red = 0xff - src->rgba8[0]; 56 uint32_t dst_green = 0xff - src->rgba8[1]; 57 uint32_t dst_blue = 0xff - src->rgba8[2]; 58 uint32_t src_alpha = src->rgba8[3]; 59 60 *dst = (src_alpha << 24) | (dst_blue << 16) | (dst_green << 8) | dst_red; 61 dst++; 62 src++; 63 } 64 dst_pixels = reinterpret_cast<char*>(dst_pixels) + dst_info.stride; 65 src_pixels = reinterpret_cast<char*>(src_pixels) + src_info.stride; 66 } 67 68 UnlockBitmaps(env, src_bitmap, dst_bitmap); 69 } 70 71 } // namespace 72
