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 <cmath> 21 #include <cstdlib> 22 23 #include "utils.h" 24 #include "_jni.h" 25 26 using android::apps::photoeditor::utils::LockBitmaps; 27 using android::apps::photoeditor::utils::pixel32_t; 28 using android::apps::photoeditor::utils::UnlockBitmaps; 29 30 namespace { 31 32 extern "C" JNIEXPORT void JNICALL Java_com_android_photoeditor_filters_ImageUtils_nativeRedEye( 33 JNIEnv *env, jobject obj, jobject src_bitmap, jobject dst_bitmap, 34 jobjectArray redeye_positions, jfloat radius, jfloat intensity) { 35 pRedEyeType f = (pRedEyeType)JNIFunc[JNI_RedEye].func_ptr; 36 return f(env, obj, src_bitmap, dst_bitmap, redeye_positions, radius, intensity); 37 } 38 39 extern "C" void RedEye( 40 JNIEnv *env, jobject obj, jobject src_bitmap, jobject dst_bitmap, 41 jobjectArray redeye_positions, jfloat radius, jfloat intensity) { 42 AndroidBitmapInfo src_info; 43 AndroidBitmapInfo dst_info; 44 void* src_pixels; 45 void* dst_pixels; 46 47 int ret = LockBitmaps( 48 env, src_bitmap, dst_bitmap, &src_info, &dst_info, &src_pixels, &dst_pixels); 49 if (ret < 0) { 50 LOGE("LockBitmaps in RedEye failed, error=%d", ret); 51 return; 52 } 53 54 memcpy(dst_pixels, src_pixels, src_info.stride * src_info.height); 55 56 // get the class reference. 57 jclass cls = env->FindClass("android/graphics/PointF"); 58 jfieldID xid = env->GetFieldID(cls, "x", "F"); 59 jfieldID yid = env->GetFieldID(cls, "y", "F"); 60 int eye_number = env->GetArrayLength(redeye_positions); 61 for (int eye = 0; eye < eye_number; eye++) { 62 jobject point_f = env->GetObjectArrayElement(redeye_positions, eye); 63 float focus_x = env->GetFloatField(point_f, xid); 64 float focus_y = env->GetFloatField(point_f, yid); 65 if (focus_x < 0.0 || focus_x > 1.0 || focus_y < 0.0 || focus_y > 1.0) { 66 // did not tap on the picture 67 continue; 68 } 69 70 float x = focus_x * src_info.width; 71 float y = focus_y * src_info.height; 72 uint32_t bound_y = y + radius; 73 if (bound_y > dst_info.height) { 74 bound_y = dst_info.height; 75 } 76 uint32_t start_x = (x > radius) ? x - radius: 0; 77 uint32_t bound_x = x + radius; 78 if (bound_x > dst_info.width) { 79 bound_x = dst_info.width; 80 } 81 uint32_t dst_y = (y > radius) ? y - radius : 0; 82 for (; dst_y < bound_y; dst_y++) { 83 uint32_t *dst = reinterpret_cast<uint32_t*>( 84 reinterpret_cast<char*>(dst_pixels) + dst_info.stride * dst_y) + start_x; 85 pixel32_t *src = reinterpret_cast<pixel32_t*>( 86 reinterpret_cast<char*>(src_pixels) + src_info.stride * dst_y) + start_x; 87 for (uint32_t dst_x = start_x; dst_x < bound_x; dst_x++) { 88 if (hypotf(dst_x - x, dst_y - y) <= radius) { 89 int32_t red = src->rgba8[0]; 90 int32_t green = src->rgba8[1]; 91 int32_t blue = src->rgba8[2]; 92 int32_t alpha = src->rgba8[3]; 93 94 float redIntensity = static_cast<float>(red) / (green + blue); 95 if (redIntensity > intensity) { 96 red = (green + blue) / 2.0f; 97 *dst = alpha << 24 | (blue << 16) | (green << 8) | red; 98 } 99 } 100 dst++; 101 src++; 102 } // dst_x 103 } // dst_y 104 } 105 106 UnlockBitmaps(env, src_bitmap, dst_bitmap); 107 } 108 109 } // namespace 110
