Romain Guy | 3b748a4 | 2013-04-17 18:54:38 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2013 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 "GraphicBuffer" |
| 18 | |
| 19 | #include "jni.h" |
| 20 | #include "JNIHelp.h" |
| 21 | |
| 22 | #include "android_os_Parcel.h" |
| 23 | #include "android_view_GraphicBuffer.h" |
| 24 | |
| 25 | #include <android_runtime/AndroidRuntime.h> |
| 26 | |
| 27 | #include <binder/Parcel.h> |
| 28 | |
| 29 | #include <ui/GraphicBuffer.h> |
| 30 | #include <ui/PixelFormat.h> |
| 31 | |
| 32 | #include <gui/IGraphicBufferAlloc.h> |
| 33 | #include <gui/ISurfaceComposer.h> |
| 34 | |
| 35 | #include <SkCanvas.h> |
| 36 | #include <SkBitmap.h> |
| 37 | |
| 38 | #include <private/gui/ComposerService.h> |
| 39 | |
| 40 | namespace android { |
| 41 | |
| 42 | // ---------------------------------------------------------------------------- |
| 43 | // Defines |
| 44 | // ---------------------------------------------------------------------------- |
| 45 | |
| 46 | // Debug |
| 47 | #define DEBUG_GRAPHIC_BUFFER 0 |
| 48 | |
| 49 | // Debug |
| 50 | #if DEBUG_GRAPHIC_BUFFER |
| 51 | #define GB_LOGD(...) ALOGD(__VA_ARGS__) |
| 52 | #define GB_LOGW(...) ALOGW(__VA_ARGS__) |
| 53 | #else |
| 54 | #define GB_LOGD(...) |
| 55 | #define GB_LOGW(...) |
| 56 | #endif |
| 57 | |
| 58 | #define LOCK_CANVAS_USAGE GraphicBuffer::USAGE_SW_READ_OFTEN | GraphicBuffer::USAGE_SW_WRITE_OFTEN |
| 59 | |
| 60 | // ---------------------------------------------------------------------------- |
| 61 | // JNI Helpers |
| 62 | // ---------------------------------------------------------------------------- |
| 63 | |
| 64 | static struct { |
| 65 | jfieldID mNativeObject; |
| 66 | } gGraphicBufferClassInfo; |
| 67 | |
| 68 | static struct { |
| 69 | jmethodID set; |
| 70 | jfieldID left; |
| 71 | jfieldID top; |
| 72 | jfieldID right; |
| 73 | jfieldID bottom; |
| 74 | } gRectClassInfo; |
| 75 | |
| 76 | static struct { |
| 77 | jfieldID mFinalizer; |
| 78 | jfieldID mNativeCanvas; |
| 79 | jfieldID mSurfaceFormat; |
| 80 | } gCanvasClassInfo; |
| 81 | |
| 82 | static struct { |
| 83 | jfieldID mNativeCanvas; |
| 84 | } gCanvasFinalizerClassInfo; |
| 85 | |
| 86 | #define GET_INT(object, field) \ |
| 87 | env->GetIntField(object, field) |
| 88 | |
| 89 | #define SET_INT(object, field, value) \ |
| 90 | env->SetIntField(object, field, value) |
| 91 | |
| 92 | #define INVOKEV(object, method, ...) \ |
| 93 | env->CallVoidMethod(object, method, __VA_ARGS__) |
| 94 | |
| 95 | // ---------------------------------------------------------------------------- |
| 96 | // Types |
| 97 | // ---------------------------------------------------------------------------- |
| 98 | |
| 99 | class GraphicBufferWrapper { |
| 100 | public: |
| 101 | GraphicBufferWrapper(const sp<GraphicBuffer>& buffer): buffer(buffer) { |
| 102 | } |
| 103 | |
| 104 | sp<GraphicBuffer> buffer; |
| 105 | }; |
| 106 | |
| 107 | // ---------------------------------------------------------------------------- |
| 108 | // GraphicBuffer lifecycle |
| 109 | // ---------------------------------------------------------------------------- |
| 110 | |
| 111 | static GraphicBufferWrapper* android_view_GraphiceBuffer_create(JNIEnv* env, jobject clazz, |
| 112 | jint width, jint height, jint format, jint usage) { |
| 113 | |
| 114 | sp<ISurfaceComposer> composer(ComposerService::getComposerService()); |
| 115 | sp<IGraphicBufferAlloc> alloc(composer->createGraphicBufferAlloc()); |
| 116 | if (alloc == NULL) { |
| 117 | GB_LOGW("createGraphicBufferAlloc() failed in GraphicBuffer.create()"); |
| 118 | return NULL; |
| 119 | } |
| 120 | |
| 121 | status_t error; |
| 122 | sp<GraphicBuffer> buffer(alloc->createGraphicBuffer(width, height, format, usage, &error)); |
| 123 | if (buffer == NULL) { |
| 124 | GB_LOGW("createGraphicBuffer() failed in GraphicBuffer.create()"); |
| 125 | return NULL; |
| 126 | } |
| 127 | |
| 128 | return new GraphicBufferWrapper(buffer); |
| 129 | } |
| 130 | |
| 131 | static void android_view_GraphiceBuffer_destroy(JNIEnv* env, jobject clazz, |
| 132 | GraphicBufferWrapper* wrapper) { |
| 133 | delete wrapper; |
| 134 | } |
| 135 | |
| 136 | // ---------------------------------------------------------------------------- |
| 137 | // Canvas management |
| 138 | // ---------------------------------------------------------------------------- |
| 139 | |
| 140 | static inline void swapCanvasPtr(JNIEnv* env, jobject canvasObj, SkCanvas* newCanvas) { |
| 141 | jobject canvasFinalizerObj = env->GetObjectField(canvasObj, gCanvasClassInfo.mFinalizer); |
| 142 | SkCanvas* previousCanvas = reinterpret_cast<SkCanvas*>( |
| 143 | GET_INT(canvasObj, gCanvasClassInfo.mNativeCanvas)); |
| 144 | SET_INT(canvasObj, gCanvasClassInfo.mNativeCanvas, (int) newCanvas); |
| 145 | SET_INT(canvasFinalizerObj, gCanvasFinalizerClassInfo.mNativeCanvas, (int) newCanvas); |
| 146 | SkSafeUnref(previousCanvas); |
| 147 | } |
| 148 | |
| 149 | static inline SkBitmap::Config convertPixelFormat(int32_t format) { |
| 150 | switch (format) { |
| 151 | case PIXEL_FORMAT_RGBA_8888: |
| 152 | return SkBitmap::kARGB_8888_Config; |
| 153 | case PIXEL_FORMAT_RGBX_8888: |
| 154 | return SkBitmap::kARGB_8888_Config; |
| 155 | case PIXEL_FORMAT_RGB_565: |
| 156 | return SkBitmap::kRGB_565_Config; |
| 157 | default: |
| 158 | return SkBitmap::kNo_Config; |
| 159 | } |
| 160 | } |
| 161 | |
| 162 | static jboolean android_view_GraphicBuffer_lockCanvas(JNIEnv* env, jobject, |
| 163 | GraphicBufferWrapper* wrapper, jobject canvas, jobject dirtyRect) { |
| 164 | |
| 165 | if (!wrapper) { |
| 166 | return false; |
| 167 | } |
| 168 | |
| 169 | sp<GraphicBuffer> buffer(wrapper->buffer); |
| 170 | |
| 171 | Rect rect; |
| 172 | if (dirtyRect) { |
| 173 | rect.left = GET_INT(dirtyRect, gRectClassInfo.left); |
| 174 | rect.top = GET_INT(dirtyRect, gRectClassInfo.top); |
| 175 | rect.right = GET_INT(dirtyRect, gRectClassInfo.right); |
| 176 | rect.bottom = GET_INT(dirtyRect, gRectClassInfo.bottom); |
| 177 | } else { |
| 178 | rect.set(Rect(buffer->getWidth(), buffer->getHeight())); |
| 179 | } |
| 180 | |
| 181 | void* bits = NULL; |
| 182 | status_t status = buffer->lock(LOCK_CANVAS_USAGE, rect, &bits); |
| 183 | |
| 184 | if (status) return false; |
| 185 | if (!bits) { |
| 186 | buffer->unlock(); |
| 187 | return false; |
| 188 | } |
| 189 | |
| 190 | ssize_t bytesCount = buffer->getStride() * bytesPerPixel(buffer->getPixelFormat()); |
| 191 | |
| 192 | SkBitmap bitmap; |
| 193 | bitmap.setConfig(convertPixelFormat(buffer->getPixelFormat()), |
| 194 | buffer->getWidth(), buffer->getHeight(), bytesCount); |
| 195 | |
| 196 | if (buffer->getWidth() > 0 && buffer->getHeight() > 0) { |
| 197 | bitmap.setPixels(bits); |
| 198 | } else { |
| 199 | bitmap.setPixels(NULL); |
| 200 | } |
| 201 | |
| 202 | SET_INT(canvas, gCanvasClassInfo.mSurfaceFormat, buffer->getPixelFormat()); |
| 203 | |
| 204 | SkCanvas* nativeCanvas = SkNEW_ARGS(SkCanvas, (bitmap)); |
| 205 | swapCanvasPtr(env, canvas, nativeCanvas); |
| 206 | |
| 207 | SkRect clipRect; |
| 208 | clipRect.set(rect.left, rect.top, rect.right, rect.bottom); |
| 209 | nativeCanvas->clipRect(clipRect); |
| 210 | |
| 211 | if (dirtyRect) { |
| 212 | INVOKEV(dirtyRect, gRectClassInfo.set, |
| 213 | int(rect.left), int(rect.top), int(rect.right), int(rect.bottom)); |
| 214 | } |
| 215 | |
| 216 | return true; |
| 217 | } |
| 218 | |
| 219 | static jboolean android_view_GraphicBuffer_unlockCanvasAndPost(JNIEnv* env, jobject, |
| 220 | GraphicBufferWrapper* wrapper, jobject canvas) { |
| 221 | |
| 222 | SkCanvas* nativeCanvas = SkNEW(SkCanvas); |
| 223 | swapCanvasPtr(env, canvas, nativeCanvas); |
| 224 | |
| 225 | if (wrapper) { |
| 226 | status_t status = wrapper->buffer->unlock(); |
| 227 | return status == 0; |
| 228 | } |
| 229 | |
| 230 | return false; |
| 231 | } |
| 232 | |
| 233 | // ---------------------------------------------------------------------------- |
| 234 | // Serialization |
| 235 | // ---------------------------------------------------------------------------- |
| 236 | |
| 237 | static void android_view_GraphiceBuffer_write(JNIEnv* env, jobject clazz, |
| 238 | GraphicBufferWrapper* wrapper, jobject dest) { |
| 239 | Parcel* parcel = parcelForJavaObject(env, dest); |
| 240 | if (parcel) { |
| 241 | parcel->write(*wrapper->buffer); |
| 242 | } |
| 243 | } |
| 244 | |
| 245 | static GraphicBufferWrapper* android_view_GraphiceBuffer_read(JNIEnv* env, jobject clazz, |
| 246 | jobject in) { |
| 247 | |
| 248 | Parcel* parcel = parcelForJavaObject(env, in); |
| 249 | if (parcel) { |
| 250 | sp<GraphicBuffer> buffer = new GraphicBuffer(); |
| 251 | parcel->read(*buffer); |
| 252 | return new GraphicBufferWrapper(buffer); |
| 253 | } |
| 254 | |
| 255 | return NULL; |
| 256 | } |
| 257 | |
| 258 | // ---------------------------------------------------------------------------- |
| 259 | // External helpers |
| 260 | // ---------------------------------------------------------------------------- |
| 261 | |
| 262 | sp<GraphicBuffer> graphicBufferForJavaObject(JNIEnv* env, jobject obj) { |
| 263 | if (obj) { |
| 264 | jint nativeObject = env->GetIntField(obj, gGraphicBufferClassInfo.mNativeObject); |
| 265 | GraphicBufferWrapper* wrapper = (GraphicBufferWrapper*) nativeObject; |
| 266 | if (wrapper != NULL) { |
| 267 | sp<GraphicBuffer> buffer(wrapper->buffer); |
| 268 | return buffer; |
| 269 | } |
| 270 | } |
| 271 | return NULL; |
| 272 | } |
| 273 | |
| 274 | // ---------------------------------------------------------------------------- |
| 275 | // JNI Glue |
| 276 | // ---------------------------------------------------------------------------- |
| 277 | |
| 278 | #define FIND_CLASS(var, className) \ |
| 279 | var = env->FindClass(className); \ |
| 280 | LOG_FATAL_IF(! var, "Unable to find class " className); |
| 281 | |
| 282 | #define GET_FIELD_ID(var, clazz, fieldName, fieldDescriptor) \ |
| 283 | var = env->GetFieldID(clazz, fieldName, fieldDescriptor); \ |
| 284 | LOG_FATAL_IF(! var, "Unable to find field " fieldName); |
| 285 | |
| 286 | #define GET_METHOD_ID(var, clazz, methodName, methodDescriptor) \ |
| 287 | var = env->GetMethodID(clazz, methodName, methodDescriptor); \ |
| 288 | LOG_FATAL_IF(!var, "Unable to find method " methodName); |
| 289 | |
| 290 | const char* const kClassPathName = "android/view/GraphicBuffer"; |
| 291 | |
| 292 | static JNINativeMethod gMethods[] = { |
| 293 | { "nCreateGraphicBuffer", "(IIII)I", (void*) android_view_GraphiceBuffer_create }, |
| 294 | { "nDestroyGraphicBuffer", "(I)V", (void*) android_view_GraphiceBuffer_destroy }, |
| 295 | |
| 296 | { "nWriteGraphicBufferToParcel", "(ILandroid/os/Parcel;)V", |
| 297 | (void*) android_view_GraphiceBuffer_write }, |
| 298 | { "nReadGraphicBufferFromParcel", "(Landroid/os/Parcel;)I", |
| 299 | (void*) android_view_GraphiceBuffer_read }, |
| 300 | |
| 301 | { "nLockCanvas", "(ILandroid/graphics/Canvas;Landroid/graphics/Rect;)Z", |
| 302 | (void*) android_view_GraphicBuffer_lockCanvas }, |
| 303 | { "nUnlockCanvasAndPost", "(ILandroid/graphics/Canvas;)Z", |
| 304 | (void*) android_view_GraphicBuffer_unlockCanvasAndPost }, |
| 305 | }; |
| 306 | |
| 307 | int register_android_view_GraphicBuffer(JNIEnv* env) { |
| 308 | jclass clazz; |
| 309 | FIND_CLASS(clazz, "android/view/GraphicBuffer"); |
| 310 | GET_FIELD_ID(gGraphicBufferClassInfo.mNativeObject, clazz, "mNativeObject", "I"); |
| 311 | |
| 312 | FIND_CLASS(clazz, "android/graphics/Rect"); |
| 313 | GET_METHOD_ID(gRectClassInfo.set, clazz, "set", "(IIII)V"); |
| 314 | GET_FIELD_ID(gRectClassInfo.left, clazz, "left", "I"); |
| 315 | GET_FIELD_ID(gRectClassInfo.top, clazz, "top", "I"); |
| 316 | GET_FIELD_ID(gRectClassInfo.right, clazz, "right", "I"); |
| 317 | GET_FIELD_ID(gRectClassInfo.bottom, clazz, "bottom", "I"); |
| 318 | |
| 319 | FIND_CLASS(clazz, "android/graphics/Canvas"); |
| 320 | GET_FIELD_ID(gCanvasClassInfo.mFinalizer, clazz, "mFinalizer", |
| 321 | "Landroid/graphics/Canvas$CanvasFinalizer;"); |
| 322 | GET_FIELD_ID(gCanvasClassInfo.mNativeCanvas, clazz, "mNativeCanvas", "I"); |
| 323 | GET_FIELD_ID(gCanvasClassInfo.mSurfaceFormat, clazz, "mSurfaceFormat", "I"); |
| 324 | |
| 325 | FIND_CLASS(clazz, "android/graphics/Canvas$CanvasFinalizer"); |
| 326 | GET_FIELD_ID(gCanvasFinalizerClassInfo.mNativeCanvas, clazz, "mNativeCanvas", "I"); |
| 327 | |
| 328 | return AndroidRuntime::registerNativeMethods(env, kClassPathName, gMethods, NELEM(gMethods)); |
| 329 | } |
| 330 | |
| 331 | }; |