| /* |
| * 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 <nativehelper/JNIHelp.h> |
| #include <inttypes.h> |
| |
| #include "android_os_Parcel.h" |
| #include <binder/Parcel.h> |
| |
| #include <log/log.h> |
| |
| #include <ui/GraphicBuffer.h> |
| #include <ui/PixelFormat.h> |
| |
| #include <android/native_window.h> |
| #include <android/graphics/canvas.h> |
| #include <android_runtime/android_graphics_GraphicBuffer.h> |
| #include <android_runtime/android_hardware_HardwareBuffer.h> |
| #include <private/android/AHardwareBufferHelpers.h> |
| |
| #include <private/gui/ComposerService.h> |
| |
| #include "core_jni_helpers.h" |
| |
| namespace android { |
| |
| // ---------------------------------------------------------------------------- |
| // Defines |
| // ---------------------------------------------------------------------------- |
| |
| // Debug |
| static const bool kDebugGraphicBuffer = false; |
| |
| #define LOCK_CANVAS_USAGE (GraphicBuffer::USAGE_SW_READ_OFTEN | GraphicBuffer::USAGE_SW_WRITE_OFTEN) |
| |
| // ---------------------------------------------------------------------------- |
| // JNI Helpers |
| // ---------------------------------------------------------------------------- |
| |
| static struct { |
| jfieldID mNativeObject; |
| jclass mClass; |
| jmethodID mConstructorMethodID; |
| } gGraphicBufferClassInfo; |
| |
| static struct { |
| jmethodID set; |
| jfieldID left; |
| jfieldID top; |
| jfieldID right; |
| jfieldID bottom; |
| } gRectClassInfo; |
| |
| #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: |
| explicit GraphicBufferWrapper(const sp<GraphicBuffer>& buffer): buffer(buffer) { |
| LOG_ALWAYS_FATAL_IF(buffer == nullptr, "creating a null GraphicBuffer"); |
| } |
| const sp<GraphicBuffer>& get() const { |
| return buffer; |
| } |
| |
| private: |
| // make sure this is immutable |
| sp<GraphicBuffer> const buffer; |
| }; |
| |
| // ---------------------------------------------------------------------------- |
| // GraphicBuffer lifecycle |
| // ---------------------------------------------------------------------------- |
| |
| static jlong android_graphics_GraphicBuffer_create(JNIEnv* env, jobject clazz, |
| jint width, jint height, jint format, jint usage) { |
| |
| sp<GraphicBuffer> buffer = new GraphicBuffer( |
| uint32_t(width), uint32_t(height), PixelFormat(format), uint32_t(usage), |
| std::string("android_graphics_GraphicBuffer_create pid [") + |
| std::to_string(getpid()) +"]"); |
| |
| status_t error = buffer->initCheck(); |
| if (error < 0) { |
| ALOGW_IF(kDebugGraphicBuffer, "createGraphicBuffer() failed in GraphicBuffer.create()"); |
| return NULL; |
| } |
| |
| GraphicBufferWrapper* wrapper = new GraphicBufferWrapper(buffer); |
| return reinterpret_cast<jlong>(wrapper); |
| } |
| |
| static void android_graphics_GraphicBuffer_destroy(JNIEnv* env, jobject clazz, |
| jlong wrapperHandle) { |
| GraphicBufferWrapper* wrapper = |
| reinterpret_cast<GraphicBufferWrapper*>(wrapperHandle); |
| delete wrapper; |
| } |
| |
| // ---------------------------------------------------------------------------- |
| // Canvas management |
| // ---------------------------------------------------------------------------- |
| |
| static jboolean android_graphics_GraphicBuffer_lockCanvas(JNIEnv* env, jobject, |
| jlong wrapperHandle, jobject canvasObj, jobject dirtyRect) { |
| |
| GraphicBufferWrapper* wrapper = |
| reinterpret_cast<GraphicBufferWrapper*>(wrapperHandle); |
| if (!wrapper) { |
| return JNI_FALSE; |
| } |
| |
| sp<GraphicBuffer> buffer(wrapper->get()); |
| |
| Rect rect(Rect::EMPTY_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; |
| } |
| |
| ANativeWindow_Buffer nativeBuffer; |
| nativeBuffer.width = buffer->getWidth(); |
| nativeBuffer.height = buffer->getHeight(); |
| nativeBuffer.stride = buffer->getStride(); |
| nativeBuffer.format = AHardwareBuffer_convertFromPixelFormat(buffer->getPixelFormat()); |
| nativeBuffer.bits = bits; |
| |
| graphics::Canvas canvas(env, canvasObj); |
| canvas.setBuffer(&nativeBuffer, ADATASPACE_UNKNOWN); |
| canvas.clipRect({rect.left, rect.top, rect.right, rect.bottom}); |
| |
| if (dirtyRect) { |
| INVOKEV(dirtyRect, gRectClassInfo.set, |
| int(rect.left), int(rect.top), int(rect.right), int(rect.bottom)); |
| } |
| |
| return JNI_TRUE; |
| } |
| |
| static jboolean android_graphics_GraphicBuffer_unlockCanvasAndPost(JNIEnv* env, jobject, |
| jlong wrapperHandle, jobject canvasObj) { |
| // release the buffer from the canvas |
| graphics::Canvas canvas(env, canvasObj); |
| canvas.setBuffer(nullptr, ADATASPACE_UNKNOWN); |
| |
| GraphicBufferWrapper* wrapper = |
| reinterpret_cast<GraphicBufferWrapper*>(wrapperHandle); |
| if (wrapper) { |
| status_t status = wrapper->get()->unlock(); |
| return status == 0 ? JNI_TRUE : JNI_FALSE; |
| } |
| |
| return JNI_FALSE; |
| } |
| |
| // ---------------------------------------------------------------------------- |
| // Serialization |
| // ---------------------------------------------------------------------------- |
| |
| static void android_graphics_GraphicBuffer_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->get()); |
| } |
| } |
| |
| static jlong android_graphics_GraphicBuffer_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> android_graphics_GraphicBuffer_getNativeGraphicsBuffer(JNIEnv* env, jobject obj) { |
| if (obj) { |
| jlong nativeObject = env->GetLongField(obj, gGraphicBufferClassInfo.mNativeObject); |
| GraphicBufferWrapper* wrapper = (GraphicBufferWrapper*) nativeObject; |
| if (wrapper != NULL) { |
| sp<GraphicBuffer> buffer(wrapper->get()); |
| return buffer; |
| } |
| } |
| return NULL; |
| } |
| |
| jobject android_graphics_GraphicBuffer_createFromAHardwareBuffer(JNIEnv* env, |
| AHardwareBuffer* hardwareBuffer) { |
| GraphicBuffer* buffer = GraphicBuffer::fromAHardwareBuffer(hardwareBuffer); |
| GraphicBufferWrapper* wrapper = new GraphicBufferWrapper(buffer); |
| jobject obj = env->NewObject(gGraphicBufferClassInfo.mClass, |
| gGraphicBufferClassInfo.mConstructorMethodID, buffer->getWidth(), buffer->getHeight(), |
| buffer->getPixelFormat(), (jint)buffer->getUsage(), reinterpret_cast<jlong>(wrapper)); |
| return obj; |
| } |
| |
| // ---------------------------------------------------------------------------- |
| // AHB to GraphicBuffer Converter |
| // ---------------------------------------------------------------------------- |
| |
| static jobject android_graphics_GraphicBuffer_createFromHardwareBuffer(JNIEnv* env, jobject clazz, |
| jobject hb) { |
| AHardwareBuffer* ahb = android_hardware_HardwareBuffer_getNativeHardwareBuffer(env, hb); |
| return android_graphics_GraphicBuffer_createFromAHardwareBuffer(env, ahb); |
| } |
| |
| }; |
| |
| using namespace android; |
| // ---------------------------------------------------------------------------- |
| // JNI Glue |
| // ---------------------------------------------------------------------------- |
| |
| const char* const kClassPathName = "android/graphics/GraphicBuffer"; |
| |
| static const JNINativeMethod gMethods[] = { |
| { "nCreateGraphicBuffer", "(IIII)J", (void*) android_graphics_GraphicBuffer_create }, |
| { "nDestroyGraphicBuffer", "(J)V", (void*) android_graphics_GraphicBuffer_destroy }, |
| |
| { "nWriteGraphicBufferToParcel", "(JLandroid/os/Parcel;)V", |
| (void*) android_graphics_GraphicBuffer_write }, |
| { "nReadGraphicBufferFromParcel", "(Landroid/os/Parcel;)J", |
| (void*) android_graphics_GraphicBuffer_read }, |
| |
| { "nLockCanvas", "(JLandroid/graphics/Canvas;Landroid/graphics/Rect;)Z", |
| (void*) android_graphics_GraphicBuffer_lockCanvas }, |
| { "nUnlockCanvasAndPost", "(JLandroid/graphics/Canvas;)Z", |
| (void*) android_graphics_GraphicBuffer_unlockCanvasAndPost }, |
| { "nCreateFromHardwareBuffer", |
| "(Landroid/hardware/HardwareBuffer;)Landroid/graphics/GraphicBuffer;", |
| (void*) android_graphics_GraphicBuffer_createFromHardwareBuffer } |
| }; |
| |
| int register_android_graphics_GraphicBuffer(JNIEnv* env) { |
| gGraphicBufferClassInfo.mClass = MakeGlobalRefOrDie(env, FindClassOrDie(env, kClassPathName)); |
| gGraphicBufferClassInfo.mNativeObject = GetFieldIDOrDie(env, gGraphicBufferClassInfo.mClass, |
| "mNativeObject", "J"); |
| gGraphicBufferClassInfo.mConstructorMethodID = env->GetMethodID(gGraphicBufferClassInfo.mClass, |
| "<init>", "(IIIIJ)V"); |
| |
| jclass clazz = FindClassOrDie(env, "android/graphics/Rect"); |
| gRectClassInfo.set = GetMethodIDOrDie(env, clazz, "set", "(IIII)V"); |
| gRectClassInfo.left = GetFieldIDOrDie(env, clazz, "left", "I"); |
| gRectClassInfo.top = GetFieldIDOrDie(env, clazz, "top", "I"); |
| gRectClassInfo.right = GetFieldIDOrDie(env, clazz, "right", "I"); |
| gRectClassInfo.bottom = GetFieldIDOrDie(env, clazz, "bottom", "I"); |
| |
| return RegisterMethodsOrDie(env, kClassPathName, gMethods, NELEM(gMethods)); |
| } |