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
Java_com_android_photoeditor_filters_ImageUtils_nativeRedEye(JNIEnv * env,jobject obj,jobject src_bitmap,jobject dst_bitmap,jobjectArray redeye_positions,jfloat radius,jfloat intensity)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
RedEye(JNIEnv * env,jobject obj,jobject src_bitmap,jobject dst_bitmap,jobjectArray redeye_positions,jfloat radius,jfloat intensity)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