Svet Ganov | df64449 | 2014-08-29 15:35:49 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2014 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 | #define LOG_TAG "BitmapSerializeUtils" |
| 18 | |
| 19 | #include <jni.h> |
Steven Moreland | 2279b25 | 2017-07-19 09:50:45 -0700 | [diff] [blame^] | 20 | #include <nativehelper/JNIHelp.h> |
Svet Ganov | df64449 | 2014-08-29 15:35:49 -0700 | [diff] [blame] | 21 | |
| 22 | #include <android/bitmap.h> |
| 23 | #include <android/log.h> |
| 24 | |
| 25 | namespace android { |
| 26 | |
| 27 | #define RGBA_8888_COLOR_DEPTH 4 |
| 28 | |
| 29 | static bool writeAllBytes(const int fd, void* buffer, const size_t byteCount) { |
| 30 | char* writeBuffer = static_cast<char*>(buffer); |
| 31 | size_t remainingBytes = byteCount; |
| 32 | while (remainingBytes > 0) { |
| 33 | ssize_t writtenByteCount = write(fd, writeBuffer, remainingBytes); |
| 34 | if (writtenByteCount == -1) { |
| 35 | if (errno == EINTR) { |
| 36 | continue; |
| 37 | } |
| 38 | __android_log_print(ANDROID_LOG_ERROR, LOG_TAG, |
| 39 | "Error writing to buffer: %d", errno); |
| 40 | return false; |
| 41 | } |
| 42 | remainingBytes -= writtenByteCount; |
| 43 | writeBuffer += writtenByteCount; |
| 44 | } |
| 45 | return true; |
| 46 | } |
| 47 | |
| 48 | static bool readAllBytes(const int fd, void* buffer, const size_t byteCount) { |
| 49 | char* readBuffer = static_cast<char*>(buffer); |
| 50 | size_t remainingBytes = byteCount; |
| 51 | while (remainingBytes > 0) { |
| 52 | ssize_t readByteCount = read(fd, readBuffer, remainingBytes); |
Philip P. Moltmann | 066bf81 | 2016-03-09 16:54:52 -0800 | [diff] [blame] | 53 | |
| 54 | remainingBytes -= readByteCount; |
| 55 | readBuffer += readByteCount; |
| 56 | |
Svet Ganov | df64449 | 2014-08-29 15:35:49 -0700 | [diff] [blame] | 57 | if (readByteCount == -1) { |
| 58 | if (errno == EINTR) { |
| 59 | continue; |
| 60 | } |
| 61 | __android_log_print(ANDROID_LOG_ERROR, LOG_TAG, |
| 62 | "Error reading from buffer: %d", errno); |
| 63 | return false; |
Philip P. Moltmann | 066bf81 | 2016-03-09 16:54:52 -0800 | [diff] [blame] | 64 | } else if (readByteCount == 0 && remainingBytes > 0) { |
| 65 | __android_log_print(ANDROID_LOG_ERROR, LOG_TAG, |
| 66 | "File closed before all bytes were read. %zu/%zu remaining", remainingBytes, |
| 67 | byteCount); |
| 68 | return false; |
Svet Ganov | df64449 | 2014-08-29 15:35:49 -0700 | [diff] [blame] | 69 | } |
Svet Ganov | df64449 | 2014-08-29 15:35:49 -0700 | [diff] [blame] | 70 | } |
| 71 | return true; |
| 72 | } |
| 73 | |
| 74 | static void throwException(JNIEnv* env, const char* className, const char* message) { |
| 75 | jclass exceptionClass = env->FindClass(className); |
| 76 | env->ThrowNew(exceptionClass, message); |
| 77 | } |
| 78 | |
| 79 | static void throwIllegalStateException(JNIEnv* env, char *message) { |
| 80 | const char* className = "java/lang/IllegalStateException"; |
| 81 | throwException(env, className, message); |
| 82 | } |
| 83 | |
| 84 | static void throwIllegalArgumentException(JNIEnv* env, char* message) { |
| 85 | const char* className = "java/lang/IllegalArgumentException"; |
| 86 | throwException(env, className, message); |
| 87 | } |
| 88 | |
Andreas Gampe | 423ba09 | 2014-11-10 20:00:25 -0800 | [diff] [blame] | 89 | static void readBitmapPixels(JNIEnv* env, jclass /* clazz */, jobject jbitmap, jint fd) { |
Svet Ganov | df64449 | 2014-08-29 15:35:49 -0700 | [diff] [blame] | 90 | // Read the info. |
| 91 | AndroidBitmapInfo readInfo; |
| 92 | bool read = readAllBytes(fd, (void*) &readInfo, sizeof(AndroidBitmapInfo)); |
| 93 | if (!read) { |
| 94 | throwIllegalStateException(env, (char*) "Cannot read bitmap info"); |
| 95 | return; |
| 96 | } |
| 97 | |
| 98 | // Get the info of the target bitmap. |
| 99 | AndroidBitmapInfo targetInfo; |
| 100 | int result = AndroidBitmap_getInfo(env, jbitmap, &targetInfo); |
| 101 | if (result < 0) { |
| 102 | throwIllegalStateException(env, (char*) "Cannot get bitmap info"); |
| 103 | return; |
| 104 | } |
| 105 | |
| 106 | // Enforce we can reuse the bitmap. |
| 107 | if (readInfo.width != targetInfo.width || readInfo.height != targetInfo.height |
| 108 | || readInfo.stride != targetInfo.stride || readInfo.format != targetInfo.format |
| 109 | || readInfo.flags != targetInfo.flags) { |
| 110 | throwIllegalArgumentException(env, (char*) "Cannot reuse bitmap"); |
| 111 | return; |
| 112 | } |
| 113 | |
| 114 | // Lock the pixels. |
| 115 | void* pixels; |
| 116 | result = AndroidBitmap_lockPixels(env, jbitmap, &pixels); |
| 117 | if (result < 0) { |
| 118 | throwIllegalStateException(env, (char*) "Cannot lock bitmap pixels"); |
| 119 | return; |
| 120 | } |
| 121 | |
| 122 | // Read the pixels. |
| 123 | size_t byteCount = readInfo.stride * readInfo.height; |
| 124 | read = readAllBytes(fd, (void*) pixels, byteCount); |
| 125 | if (!read) { |
| 126 | throwIllegalStateException(env, (char*) "Cannot read bitmap pixels"); |
| 127 | return; |
| 128 | } |
| 129 | |
| 130 | // Unlock the pixels. |
| 131 | result = AndroidBitmap_unlockPixels(env, jbitmap); |
| 132 | if (result < 0) { |
| 133 | throwIllegalStateException(env, (char*) "Cannot unlock bitmap pixels"); |
| 134 | } |
| 135 | } |
| 136 | |
Andreas Gampe | 423ba09 | 2014-11-10 20:00:25 -0800 | [diff] [blame] | 137 | static void writeBitmapPixels(JNIEnv* env, jclass /* clazz */, jobject jbitmap, jint fd) { |
Svet Ganov | df64449 | 2014-08-29 15:35:49 -0700 | [diff] [blame] | 138 | // Get the info. |
| 139 | AndroidBitmapInfo info; |
| 140 | int result = AndroidBitmap_getInfo(env, jbitmap, &info); |
| 141 | if (result < 0) { |
| 142 | throwIllegalStateException(env, (char*) "Cannot get bitmap info"); |
| 143 | return; |
| 144 | } |
| 145 | |
| 146 | // Write the info. |
| 147 | bool written = writeAllBytes(fd, (void*) &info, sizeof(AndroidBitmapInfo)); |
| 148 | if (!written) { |
| 149 | throwIllegalStateException(env, (char*) "Cannot write bitmap info"); |
| 150 | return; |
| 151 | } |
| 152 | |
| 153 | // Lock the pixels. |
| 154 | void* pixels; |
| 155 | result = AndroidBitmap_lockPixels(env, jbitmap, &pixels); |
| 156 | if (result < 0) { |
| 157 | throwIllegalStateException(env, (char*) "Cannot lock bitmap pixels"); |
| 158 | return; |
| 159 | } |
| 160 | |
| 161 | // Write the pixels. |
| 162 | size_t byteCount = info.stride * info.height; |
| 163 | written = writeAllBytes(fd, (void*) pixels, byteCount); |
| 164 | if (!written) { |
| 165 | throwIllegalStateException(env, (char*) "Cannot write bitmap pixels"); |
| 166 | return; |
| 167 | } |
| 168 | |
| 169 | // Unlock the pixels. |
| 170 | result = AndroidBitmap_unlockPixels(env, jbitmap); |
| 171 | if (result < 0) { |
| 172 | throwIllegalStateException(env, (char*) "Cannot unlock bitmap pixels"); |
| 173 | } |
| 174 | } |
| 175 | |
Daniel Micay | 76f6a86 | 2015-09-19 17:31:01 -0400 | [diff] [blame] | 176 | static const JNINativeMethod sMethods[] = { |
Svet Ganov | df64449 | 2014-08-29 15:35:49 -0700 | [diff] [blame] | 177 | {"nativeReadBitmapPixels", "(Landroid/graphics/Bitmap;I)V", (void *) readBitmapPixels}, |
| 178 | {"nativeWriteBitmapPixels", "(Landroid/graphics/Bitmap;I)V", (void *) writeBitmapPixels}, |
| 179 | }; |
| 180 | |
| 181 | int register_com_android_printspooler_util_BitmapSerializeUtils(JNIEnv* env) { |
| 182 | return jniRegisterNativeMethods(env, "com/android/printspooler/util/BitmapSerializeUtils", |
| 183 | sMethods, NELEM(sMethods)); |
| 184 | } |
| 185 | |
| 186 | } |
| 187 | |
| 188 | jint JNI_OnLoad(JavaVM* jvm, void*) { |
| 189 | JNIEnv *env = NULL; |
| 190 | if (jvm->GetEnv((void**) &env, JNI_VERSION_1_6)) { |
| 191 | return JNI_ERR; |
| 192 | } |
| 193 | |
| 194 | if (android::register_com_android_printspooler_util_BitmapSerializeUtils(env) == -1) { |
| 195 | return JNI_ERR; |
| 196 | } |
| 197 | |
| 198 | return JNI_VERSION_1_6; |
| 199 | } |