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
Java_com_android_photoeditor_filters_ImageUtils_nativeCrossProcess(JNIEnv * env,jobject obj,jobject src_bitmap,jobject dst_bitmap)29 extern "C" JNIEXPORT void JNICALL Java_com_android_photoeditor_filters_ImageUtils_nativeCrossProcess(
30 JNIEnv *env, jobject obj, jobject src_bitmap, jobject dst_bitmap) {
31 pCrossProcessType f = (pCrossProcessType)JNIFunc[JNI_CrossProcess].func_ptr;
32 return f(env, obj, src_bitmap, dst_bitmap);
33 }
34
CrossProcess(JNIEnv * env,jobject obj,jobject src_bitmap,jobject dst_bitmap)35 extern "C" void CrossProcess(
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 Crossprocess failed, error=%d", ret);
46 return;
47 }
48
49 const int k128SquareDouble = 32768; // 2 * 128^2
50 const int k128CubicDouble = 4194304; // 2 * 128^3
51 for (uint32_t scan_line = 0; scan_line < dst_info.height; scan_line++) {
52 uint32_t* dst = reinterpret_cast<uint32_t*>(dst_pixels);
53 pixel32_t* src = reinterpret_cast<pixel32_t*>(src_pixels);
54 pixel32_t* src_line_end = src + src_info.width;
55
56 while (src < src_line_end) {
57 // Enhance red contrast
58 uint32_t r = src->rgba8[0];
59 uint32_t dst_red;
60 if (r <= 128) {
61 dst_red = 255 * r * r * r / k128CubicDouble;
62 } else {
63 uint32_t diff_r = 255 - r;
64 dst_red = 255 - 255 * diff_r * diff_r * diff_r / k128CubicDouble;
65 }
66 // Enhance green contrast
67 int g = src->rgba8[1];
68 uint32_t dst_green;
69 if (g <= 128) {
70 dst_green = 255 * g * g / k128SquareDouble;
71 } else {
72 int diff_g = 255 - g;
73 dst_green = 255 - 255 * diff_g * diff_g / k128SquareDouble;
74 }
75 // Narrow the blue channel, from 64 to 192.
76 int dst_blue = src->rgba8[2] * 128 / 255 + 64;
77
78 *dst = (src->rgba8[3] << 24) | (dst_blue << 16) | (dst_green << 8) | dst_red;
79 dst++;
80 src++;
81 }
82 dst_pixels = reinterpret_cast<char*>(dst_pixels) + dst_info.stride;
83 src_pixels = reinterpret_cast<char*>(src_pixels) + src_info.stride;
84 }
85
86 UnlockBitmaps(env, src_bitmap, dst_bitmap);
87 }
88
89 } // namespace
90