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_nativeDuotone(JNIEnv * env,jobject obj,jobject src_bitmap,jobject dst_bitmap,jint color1,jint color2)29 extern "C" JNIEXPORT void JNICALL Java_com_android_photoeditor_filters_ImageUtils_nativeDuotone(
30 JNIEnv *env, jobject obj, jobject src_bitmap, jobject dst_bitmap, jint color1, jint color2) {
31 pDuotoneType f = (pDuotoneType)JNIFunc[JNI_Duotone].func_ptr;
32 return f(env, obj, src_bitmap, dst_bitmap, color1, color2);
33 }
34
Duotone(JNIEnv * env,jobject obj,jobject src_bitmap,jobject dst_bitmap,jint color1,jint color2)35 extern "C" void Duotone(
36 JNIEnv *env, jobject obj, jobject src_bitmap, jobject dst_bitmap, jint color1, jint color2) {
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 Duotone failed, error=%d", ret);
46 return;
47 }
48
49 uint8_t red1 = static_cast<uint8_t>(color1 >> 16) & 0xff;
50 uint8_t green1 = static_cast<uint8_t>(color1 >> 8) & 0xff;
51 uint8_t blue1 = static_cast<uint8_t>(color1) & 0xff;
52
53 uint8_t red2 = (uint8_t)(color2 >> 16) & 0xff;
54 uint8_t green2 = (uint8_t)(color2 >> 8) & 0xff;
55 uint8_t blue2 = (uint8_t)color2 & 0xff;
56
57 int r_delta = red2 - red1;
58 int g_delta = green2 - green1;
59 int b_delta = blue2 - blue1;
60
61 const uint32_t kEnergyLevels = 255 * 3 + 1;
62 uint8_t r_table[kEnergyLevels];
63 uint8_t g_table[kEnergyLevels];
64 uint8_t b_table[kEnergyLevels];
65 for (uint32_t energy = 0; energy < kEnergyLevels; energy++) {
66 r_table[energy] = (uint8_t)(red1 + energy * r_delta / kEnergyLevels);
67 g_table[energy] = (uint8_t)(green1 + energy * g_delta / kEnergyLevels);
68 b_table[energy] = (uint8_t)(blue1 + energy * b_delta / kEnergyLevels);
69 }
70
71 for (uint32_t scan_line = 0; scan_line < dst_info.height; scan_line++) {
72 uint32_t* dst = reinterpret_cast<uint32_t*>(dst_pixels);
73 pixel32_t* src = reinterpret_cast<pixel32_t*>(src_pixels);
74 pixel32_t* src_line_end = src + src_info.width;
75
76 while (src < src_line_end) {
77 uint32_t energy = src->rgba8[0] + src->rgba8[1] + src->rgba8[2];
78
79 int dst_red = r_table[energy];
80 int dst_green = g_table[energy];
81 int dst_blue = b_table[energy];
82
83 *dst = (src->rgba8[3] << 24) | (dst_blue << 16) | (dst_green << 8) | dst_red;
84 dst++;
85 src++;
86 }
87 dst_pixels = reinterpret_cast<char*>(dst_pixels) + dst_info.stride;
88 src_pixels = reinterpret_cast<char*>(src_pixels) + src_info.stride;
89 }
90
91 UnlockBitmaps(env, src_bitmap, dst_bitmap);
92 }
93
94 } // namespace
95