| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #define LOG_TAG "GraphicBuffer" |
| |
| #include "jni.h" |
| #include "JNIHelp.h" |
| |
| #include "android_os_Parcel.h" |
| #include "android_view_GraphicBuffer.h" |
| #include "android/graphics/GraphicsJNI.h" |
| |
| #include <android_runtime/AndroidRuntime.h> |
| |
| #include <binder/Parcel.h> |
| |
| #include <ui/GraphicBuffer.h> |
| #include <ui/PixelFormat.h> |
| |
| #include <gui/IGraphicBufferAlloc.h> |
| #include <gui/ISurfaceComposer.h> |
| |
| #include <SkCanvas.h> |
| #include <SkBitmap.h> |
| |
| #include <private/gui/ComposerService.h> |
| |
| namespace android { |
| |
| // ---------------------------------------------------------------------------- |
| // Defines |
| // ---------------------------------------------------------------------------- |
| |
| // Debug |
| #define DEBUG_GRAPHIC_BUFFER 0 |
| |
| // Debug |
| #if DEBUG_GRAPHIC_BUFFER |
| #define GB_LOGD(...) ALOGD(__VA_ARGS__) |
| #define GB_LOGW(...) ALOGW(__VA_ARGS__) |
| #else |
| #define GB_LOGD(...) |
| #define GB_LOGW(...) |
| #endif |
| |
| #define LOCK_CANVAS_USAGE GraphicBuffer::USAGE_SW_READ_OFTEN | GraphicBuffer::USAGE_SW_WRITE_OFTEN |
| |
| // ---------------------------------------------------------------------------- |
| // JNI Helpers |
| // ---------------------------------------------------------------------------- |
| |
| static struct { |
| jfieldID mNativeObject; |
| } gGraphicBufferClassInfo; |
| |
| static struct { |
| jmethodID set; |
| jfieldID left; |
| jfieldID top; |
| jfieldID right; |
| jfieldID bottom; |
| } gRectClassInfo; |
| |
| static struct { |
| jfieldID mSurfaceFormat; |
| jmethodID setNativeBitmap; |
| } gCanvasClassInfo; |
| |
| #define GET_INT(object, field) \ |
| env->GetIntField(object, field) |
| |
| #define SET_INT(object, field, value) \ |
| env->SetIntField(object, field, value) |
| |
| #define GET_LONG(object, field) \ |
| env->GetLongField(object, field) |
| |
| #define SET_LONG(object, field, value) \ |
| env->SetLongField(object, field, value) |
| |
| #define INVOKEV(object, method, ...) \ |
| env->CallVoidMethod(object, method, __VA_ARGS__) |
| |
| // ---------------------------------------------------------------------------- |
| // Types |
| // ---------------------------------------------------------------------------- |
| |
| class GraphicBufferWrapper { |
| public: |
| GraphicBufferWrapper(const sp<GraphicBuffer>& buffer): buffer(buffer) { |
| } |
| |
| sp<GraphicBuffer> buffer; |
| }; |
| |
| // ---------------------------------------------------------------------------- |
| // GraphicBuffer lifecycle |
| // ---------------------------------------------------------------------------- |
| |
| static jlong android_view_GraphiceBuffer_create(JNIEnv* env, jobject clazz, |
| jint width, jint height, jint format, jint usage) { |
| |
| sp<ISurfaceComposer> composer(ComposerService::getComposerService()); |
| sp<IGraphicBufferAlloc> alloc(composer->createGraphicBufferAlloc()); |
| if (alloc == NULL) { |
| GB_LOGW("createGraphicBufferAlloc() failed in GraphicBuffer.create()"); |
| return NULL; |
| } |
| |
| status_t error; |
| sp<GraphicBuffer> buffer(alloc->createGraphicBuffer(width, height, format, usage, &error)); |
| if (buffer == NULL) { |
| GB_LOGW("createGraphicBuffer() failed in GraphicBuffer.create()"); |
| return NULL; |
| } |
| |
| GraphicBufferWrapper* wrapper = new GraphicBufferWrapper(buffer); |
| return reinterpret_cast<jlong>(wrapper); |
| } |
| |
| static void android_view_GraphiceBuffer_destroy(JNIEnv* env, jobject clazz, |
| jlong wrapperHandle) { |
| GraphicBufferWrapper* wrapper = |
| reinterpret_cast<GraphicBufferWrapper*>(wrapperHandle); |
| delete wrapper; |
| } |
| |
| // ---------------------------------------------------------------------------- |
| // Canvas management |
| // ---------------------------------------------------------------------------- |
| |
| static inline SkBitmap::Config convertPixelFormat(int32_t format) { |
| switch (format) { |
| case PIXEL_FORMAT_RGBA_8888: |
| return SkBitmap::kARGB_8888_Config; |
| case PIXEL_FORMAT_RGBX_8888: |
| return SkBitmap::kARGB_8888_Config; |
| case PIXEL_FORMAT_RGB_565: |
| return SkBitmap::kRGB_565_Config; |
| default: |
| return SkBitmap::kNo_Config; |
| } |
| } |
| |
| static jboolean android_view_GraphicBuffer_lockCanvas(JNIEnv* env, jobject, |
| jlong wrapperHandle, jobject canvas, jobject dirtyRect) { |
| |
| GraphicBufferWrapper* wrapper = |
| reinterpret_cast<GraphicBufferWrapper*>(wrapperHandle); |
| if (!wrapper) { |
| return JNI_FALSE; |
| } |
| |
| sp<GraphicBuffer> buffer(wrapper->buffer); |
| |
| Rect rect; |
| if (dirtyRect) { |
| rect.left = GET_INT(dirtyRect, gRectClassInfo.left); |
| rect.top = GET_INT(dirtyRect, gRectClassInfo.top); |
| rect.right = GET_INT(dirtyRect, gRectClassInfo.right); |
| rect.bottom = GET_INT(dirtyRect, gRectClassInfo.bottom); |
| } else { |
| rect.set(Rect(buffer->getWidth(), buffer->getHeight())); |
| } |
| |
| void* bits = NULL; |
| status_t status = buffer->lock(LOCK_CANVAS_USAGE, rect, &bits); |
| |
| if (status) return JNI_FALSE; |
| if (!bits) { |
| buffer->unlock(); |
| return JNI_FALSE; |
| } |
| |
| ssize_t bytesCount = buffer->getStride() * bytesPerPixel(buffer->getPixelFormat()); |
| |
| SkBitmap bitmap; |
| bitmap.setConfig(convertPixelFormat(buffer->getPixelFormat()), |
| buffer->getWidth(), buffer->getHeight(), bytesCount); |
| |
| if (buffer->getWidth() > 0 && buffer->getHeight() > 0) { |
| bitmap.setPixels(bits); |
| } else { |
| bitmap.setPixels(NULL); |
| } |
| |
| SET_INT(canvas, gCanvasClassInfo.mSurfaceFormat, buffer->getPixelFormat()); |
| INVOKEV(canvas, gCanvasClassInfo.setNativeBitmap, reinterpret_cast<jlong>(&bitmap)); |
| |
| SkRect clipRect; |
| clipRect.set(rect.left, rect.top, rect.right, rect.bottom); |
| SkCanvas* nativeCanvas = GraphicsJNI::getNativeCanvas(env, canvas); |
| nativeCanvas->clipRect(clipRect); |
| |
| if (dirtyRect) { |
| INVOKEV(dirtyRect, gRectClassInfo.set, |
| int(rect.left), int(rect.top), int(rect.right), int(rect.bottom)); |
| } |
| |
| return JNI_TRUE; |
| } |
| |
| static jboolean android_view_GraphicBuffer_unlockCanvasAndPost(JNIEnv* env, jobject, |
| jlong wrapperHandle, jobject canvas) { |
| |
| GraphicBufferWrapper* wrapper = |
| reinterpret_cast<GraphicBufferWrapper*>(wrapperHandle); |
| INVOKEV(canvas, gCanvasClassInfo.setNativeBitmap, (jlong)0); |
| |
| if (wrapper) { |
| status_t status = wrapper->buffer->unlock(); |
| return status == 0 ? JNI_TRUE : JNI_FALSE; |
| } |
| |
| return JNI_FALSE; |
| } |
| |
| // ---------------------------------------------------------------------------- |
| // Serialization |
| // ---------------------------------------------------------------------------- |
| |
| static void android_view_GraphiceBuffer_write(JNIEnv* env, jobject clazz, |
| jlong wrapperHandle, jobject dest) { |
| GraphicBufferWrapper* wrapper = |
| reinterpret_cast<GraphicBufferWrapper*>(wrapperHandle); |
| Parcel* parcel = parcelForJavaObject(env, dest); |
| if (parcel) { |
| parcel->write(*wrapper->buffer); |
| } |
| } |
| |
| static jlong android_view_GraphiceBuffer_read(JNIEnv* env, jobject clazz, |
| jobject in) { |
| |
| Parcel* parcel = parcelForJavaObject(env, in); |
| if (parcel) { |
| sp<GraphicBuffer> buffer = new GraphicBuffer(); |
| parcel->read(*buffer); |
| return reinterpret_cast<jlong>(new GraphicBufferWrapper(buffer)); |
| } |
| |
| return NULL; |
| } |
| |
| // ---------------------------------------------------------------------------- |
| // External helpers |
| // ---------------------------------------------------------------------------- |
| |
| sp<GraphicBuffer> graphicBufferForJavaObject(JNIEnv* env, jobject obj) { |
| if (obj) { |
| jlong nativeObject = env->GetLongField(obj, gGraphicBufferClassInfo.mNativeObject); |
| GraphicBufferWrapper* wrapper = (GraphicBufferWrapper*) nativeObject; |
| if (wrapper != NULL) { |
| sp<GraphicBuffer> buffer(wrapper->buffer); |
| return buffer; |
| } |
| } |
| return NULL; |
| } |
| |
| // ---------------------------------------------------------------------------- |
| // JNI Glue |
| // ---------------------------------------------------------------------------- |
| |
| #define FIND_CLASS(var, className) \ |
| var = env->FindClass(className); \ |
| LOG_FATAL_IF(! var, "Unable to find class " className); |
| |
| #define GET_FIELD_ID(var, clazz, fieldName, fieldDescriptor) \ |
| var = env->GetFieldID(clazz, fieldName, fieldDescriptor); \ |
| LOG_FATAL_IF(! var, "Unable to find field " fieldName); |
| |
| #define GET_METHOD_ID(var, clazz, methodName, methodDescriptor) \ |
| var = env->GetMethodID(clazz, methodName, methodDescriptor); \ |
| LOG_FATAL_IF(!var, "Unable to find method " methodName); |
| |
| const char* const kClassPathName = "android/view/GraphicBuffer"; |
| |
| static JNINativeMethod gMethods[] = { |
| { "nCreateGraphicBuffer", "(IIII)J", (void*) android_view_GraphiceBuffer_create }, |
| { "nDestroyGraphicBuffer", "(J)V", (void*) android_view_GraphiceBuffer_destroy }, |
| |
| { "nWriteGraphicBufferToParcel", "(JLandroid/os/Parcel;)V", |
| (void*) android_view_GraphiceBuffer_write }, |
| { "nReadGraphicBufferFromParcel", "(Landroid/os/Parcel;)J", |
| (void*) android_view_GraphiceBuffer_read }, |
| |
| { "nLockCanvas", "(JLandroid/graphics/Canvas;Landroid/graphics/Rect;)Z", |
| (void*) android_view_GraphicBuffer_lockCanvas }, |
| { "nUnlockCanvasAndPost", "(JLandroid/graphics/Canvas;)Z", |
| (void*) android_view_GraphicBuffer_unlockCanvasAndPost }, |
| }; |
| |
| int register_android_view_GraphicBuffer(JNIEnv* env) { |
| jclass clazz; |
| FIND_CLASS(clazz, "android/view/GraphicBuffer"); |
| GET_FIELD_ID(gGraphicBufferClassInfo.mNativeObject, clazz, "mNativeObject", "J"); |
| |
| FIND_CLASS(clazz, "android/graphics/Rect"); |
| GET_METHOD_ID(gRectClassInfo.set, clazz, "set", "(IIII)V"); |
| GET_FIELD_ID(gRectClassInfo.left, clazz, "left", "I"); |
| GET_FIELD_ID(gRectClassInfo.top, clazz, "top", "I"); |
| GET_FIELD_ID(gRectClassInfo.right, clazz, "right", "I"); |
| GET_FIELD_ID(gRectClassInfo.bottom, clazz, "bottom", "I"); |
| |
| FIND_CLASS(clazz, "android/graphics/Canvas"); |
| GET_FIELD_ID(gCanvasClassInfo.mSurfaceFormat, clazz, "mSurfaceFormat", "I"); |
| GET_METHOD_ID(gCanvasClassInfo.setNativeBitmap, clazz, "setNativeBitmap", "(J)V"); |
| |
| return AndroidRuntime::registerNativeMethods(env, kClassPathName, gMethods, NELEM(gMethods)); |
| } |
| |
| }; |