1 /* 2 * Copyright (C) 2017 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 "HardwareBuffer" 18 19 #include "jni.h" 20 #include <nativehelper/JNIHelp.h> 21 22 #include "android_os_Parcel.h" 23 #include "android/graphics/GraphicsJNI.h" 24 25 #include <android/hardware_buffer.h> 26 #include <android_runtime/android_hardware_HardwareBuffer.h> 27 #include <android_runtime/AndroidRuntime.h> 28 #include <android_runtime/Log.h> 29 #include <private/android/AHardwareBufferHelpers.h> 30 31 #include <binder/Parcel.h> 32 33 #include <ui/GraphicBuffer.h> 34 #include <private/gui/ComposerService.h> 35 36 #include <hardware/gralloc1.h> 37 #include <grallocusage/GrallocUsageConversion.h> 38 39 #include "core_jni_helpers.h" 40 41 using namespace android; 42 43 // ---------------------------------------------------------------------------- 44 // Defines 45 // ---------------------------------------------------------------------------- 46 47 // Debug 48 static constexpr bool kDebugGraphicBuffer = false; 49 50 // ---------------------------------------------------------------------------- 51 // Types 52 // ---------------------------------------------------------------------------- 53 54 static struct { 55 jclass clazz; 56 jfieldID mNativeObject; 57 jmethodID ctor; 58 } gHardwareBufferClassInfo; 59 60 class GraphicBufferWrapper { 61 public: 62 explicit GraphicBufferWrapper(const sp<GraphicBuffer>& buffer) 63 : buffer(buffer) {} 64 65 sp<GraphicBuffer> buffer; 66 }; 67 68 // ---------------------------------------------------------------------------- 69 // HardwareBuffer lifecycle 70 // ---------------------------------------------------------------------------- 71 72 static jlong android_hardware_HardwareBuffer_create(JNIEnv* env, jobject clazz, 73 jint width, jint height, jint format, jint layers, jlong usage) { 74 75 // TODO: update createGraphicBuffer to take two 64-bit values. 76 int pixelFormat = android_hardware_HardwareBuffer_convertToPixelFormat(format); 77 if (pixelFormat == 0) { 78 if (kDebugGraphicBuffer) { 79 ALOGW("createGraphicBufferAlloc() invalid pixel format in HardwareBuffer.create()"); 80 } 81 return NULL; 82 } 83 84 uint64_t grallocUsage = AHardwareBuffer_convertToGrallocUsageBits(usage); 85 sp<GraphicBuffer> buffer = new GraphicBuffer(width, height, pixelFormat, layers, 86 grallocUsage, std::string("HardwareBuffer pid [") + std::to_string(getpid()) +"]"); 87 status_t error = buffer->initCheck(); 88 if (error < 0) { 89 if (kDebugGraphicBuffer) { 90 ALOGW("createGraphicBuffer() failed in HardwareBuffer.create()"); 91 } 92 return NULL; 93 } 94 95 GraphicBufferWrapper* wrapper = new GraphicBufferWrapper(buffer); 96 return reinterpret_cast<jlong>(wrapper); 97 } 98 99 static void destroyWrapper(GraphicBufferWrapper* wrapper) { 100 delete wrapper; 101 } 102 103 static jlong android_hardware_HardwareBuffer_getNativeFinalizer(JNIEnv* env, jobject clazz) { 104 return static_cast<jlong>(reinterpret_cast<uintptr_t>(&destroyWrapper)); 105 } 106 107 //---------------------------------------------------------------------------- 108 // Accessors 109 // ---------------------------------------------------------------------------- 110 111 static inline GraphicBuffer* GraphicBufferWrapper_to_GraphicBuffer( 112 jlong nativeObject) { 113 return reinterpret_cast<GraphicBufferWrapper*>(nativeObject)->buffer.get(); 114 } 115 116 static jint android_hardware_HardwareBuffer_getWidth(JNIEnv* env, jobject clazz, 117 jlong nativeObject) { 118 GraphicBuffer* buffer = GraphicBufferWrapper_to_GraphicBuffer(nativeObject); 119 return static_cast<jint>(buffer->getWidth()); 120 } 121 122 static jint android_hardware_HardwareBuffer_getHeight(JNIEnv* env, 123 jobject clazz, jlong nativeObject) { 124 GraphicBuffer* buffer = GraphicBufferWrapper_to_GraphicBuffer(nativeObject); 125 return static_cast<jint>(buffer->getHeight()); 126 } 127 128 static jint android_hardware_HardwareBuffer_getFormat(JNIEnv* env, 129 jobject clazz, jlong nativeObject) { 130 GraphicBuffer* buffer = GraphicBufferWrapper_to_GraphicBuffer(nativeObject); 131 return static_cast<jint>(android_hardware_HardwareBuffer_convertFromPixelFormat( 132 buffer->getPixelFormat())); 133 } 134 135 static jint android_hardware_HardwareBuffer_getLayers(JNIEnv* env, 136 jobject clazz, jlong nativeObject) { 137 GraphicBuffer* buffer = GraphicBufferWrapper_to_GraphicBuffer(nativeObject); 138 return static_cast<jint>(buffer->getLayerCount()); 139 } 140 141 static jlong android_hardware_HardwareBuffer_getUsage(JNIEnv* env, 142 jobject clazz, jlong nativeObject) { 143 GraphicBuffer* buffer = GraphicBufferWrapper_to_GraphicBuffer(nativeObject); 144 return AHardwareBuffer_convertFromGrallocUsageBits(buffer->getUsage()); 145 } 146 147 // ---------------------------------------------------------------------------- 148 // Serialization 149 // ---------------------------------------------------------------------------- 150 151 static void android_hardware_HardwareBuffer_write(JNIEnv* env, jobject clazz, 152 jlong nativeObject, jobject dest) { 153 GraphicBuffer* buffer = GraphicBufferWrapper_to_GraphicBuffer(nativeObject); 154 Parcel* parcel = parcelForJavaObject(env, dest); 155 if (parcel) { 156 parcel->write(*buffer); 157 } 158 } 159 160 static jlong android_hardware_HardwareBuffer_read(JNIEnv* env, jobject clazz, 161 jobject in) { 162 Parcel* parcel = parcelForJavaObject(env, in); 163 if (parcel) { 164 sp<GraphicBuffer> buffer = new GraphicBuffer(); 165 parcel->read(*buffer); 166 return reinterpret_cast<jlong>(new GraphicBufferWrapper(buffer)); 167 } 168 169 return NULL; 170 } 171 172 // ---------------------------------------------------------------------------- 173 // Public functions 174 // ---------------------------------------------------------------------------- 175 176 namespace android { 177 178 AHardwareBuffer* android_hardware_HardwareBuffer_getNativeHardwareBuffer( 179 JNIEnv* env, jobject hardwareBufferObj) { 180 if (env->IsInstanceOf(hardwareBufferObj, gHardwareBufferClassInfo.clazz)) { 181 GraphicBuffer* buffer = GraphicBufferWrapper_to_GraphicBuffer( 182 env->GetLongField(hardwareBufferObj, gHardwareBufferClassInfo.mNativeObject)); 183 return AHardwareBuffer_from_GraphicBuffer(buffer); 184 185 } else { 186 return nullptr; 187 } 188 } 189 190 jobject android_hardware_HardwareBuffer_createFromAHardwareBuffer( 191 JNIEnv* env, AHardwareBuffer* hardwareBuffer) { 192 GraphicBuffer* buffer = AHardwareBuffer_to_GraphicBuffer(hardwareBuffer); 193 GraphicBufferWrapper* wrapper = new GraphicBufferWrapper(buffer); 194 jobject hardwareBufferObj = env->NewObject(gHardwareBufferClassInfo.clazz, 195 gHardwareBufferClassInfo.ctor, reinterpret_cast<jlong>(wrapper)); 196 if (hardwareBufferObj == NULL) { 197 delete wrapper; 198 if (env->ExceptionCheck()) { 199 ALOGE("Could not create instance of HardwareBuffer from AHardwareBuffer."); 200 LOGE_EX(env); 201 env->ExceptionClear(); 202 } 203 return nullptr; 204 } 205 return hardwareBufferObj; 206 } 207 208 uint32_t android_hardware_HardwareBuffer_convertFromPixelFormat(uint32_t format) { 209 return AHardwareBuffer_convertFromPixelFormat(format); 210 } 211 212 uint32_t android_hardware_HardwareBuffer_convertToPixelFormat(uint32_t format) { 213 return AHardwareBuffer_convertToPixelFormat(format); 214 } 215 216 uint64_t android_hardware_HardwareBuffer_convertToGrallocUsageBits(uint64_t usage) { 217 return AHardwareBuffer_convertToGrallocUsageBits(usage); 218 } 219 220 } // namespace android 221 222 // ---------------------------------------------------------------------------- 223 // JNI Glue 224 // ---------------------------------------------------------------------------- 225 226 const char* const kClassPathName = "android/hardware/HardwareBuffer"; 227 228 static const JNINativeMethod gMethods[] = { 229 { "nCreateHardwareBuffer", "(IIIIJ)J", 230 (void*) android_hardware_HardwareBuffer_create }, 231 { "nGetNativeFinalizer", "()J", 232 (void*) android_hardware_HardwareBuffer_getNativeFinalizer }, 233 { "nWriteHardwareBufferToParcel", "(JLandroid/os/Parcel;)V", 234 (void*) android_hardware_HardwareBuffer_write }, 235 { "nReadHardwareBufferFromParcel", "(Landroid/os/Parcel;)J", 236 (void*) android_hardware_HardwareBuffer_read }, 237 238 // --------------- @FastNative ---------------------- 239 { "nGetWidth", "(J)I", (void*) android_hardware_HardwareBuffer_getWidth }, 240 { "nGetHeight", "(J)I", (void*) android_hardware_HardwareBuffer_getHeight }, 241 { "nGetFormat", "(J)I", (void*) android_hardware_HardwareBuffer_getFormat }, 242 { "nGetLayers", "(J)I", (void*) android_hardware_HardwareBuffer_getLayers }, 243 { "nGetUsage", "(J)J", (void*) android_hardware_HardwareBuffer_getUsage }, 244 }; 245 246 int register_android_hardware_HardwareBuffer(JNIEnv* env) { 247 int err = RegisterMethodsOrDie(env, kClassPathName, gMethods, 248 NELEM(gMethods)); 249 250 jclass clazz = FindClassOrDie(env, "android/hardware/HardwareBuffer"); 251 gHardwareBufferClassInfo.clazz = MakeGlobalRefOrDie(env, clazz); 252 gHardwareBufferClassInfo.mNativeObject = GetFieldIDOrDie(env, 253 gHardwareBufferClassInfo.clazz, "mNativeObject", "J"); 254 gHardwareBufferClassInfo.ctor = GetMethodIDOrDie(env, 255 gHardwareBufferClassInfo.clazz, "<init>", "(J)V"); 256 257 return err; 258 } 259
