321 lines
9.1 KiB
C++
321 lines
9.1 KiB
C++
/*
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* Copyright (C) 2007 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "GraphicBuffer"
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#include <stdlib.h>
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#include <stdint.h>
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#include <sys/types.h>
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#include <utils/Errors.h>
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#include <utils/Log.h>
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#include <ui/GraphicBuffer.h>
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#include <ui/GraphicBufferAllocator.h>
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#include <ui/GraphicBufferMapper.h>
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#include <ui/PixelFormat.h>
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namespace android {
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// ===========================================================================
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// Buffer and implementation of ANativeWindowBuffer
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// ===========================================================================
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GraphicBuffer::GraphicBuffer()
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: BASE(), mOwner(ownData), mBufferMapper(GraphicBufferMapper::get()),
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mInitCheck(NO_ERROR) {
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width =
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height =
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stride =
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format =
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usage = 0;
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handle = NULL;
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}
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GraphicBuffer::GraphicBuffer(uint32_t w, uint32_t h,
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PixelFormat reqFormat, uint32_t reqUsage)
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: BASE(), mOwner(ownData), mBufferMapper(GraphicBufferMapper::get()),
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mInitCheck(NO_ERROR)
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{
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width =
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height =
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stride =
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format =
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usage = 0;
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handle = NULL;
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mInitCheck = initSize(w, h, reqFormat, reqUsage);
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}
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GraphicBuffer::GraphicBuffer(uint32_t w, uint32_t h,
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PixelFormat inFormat, uint32_t inUsage,
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uint32_t inStride, native_handle_t* inHandle, bool keepOwnership)
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: BASE(), mOwner(keepOwnership ? ownHandle : ownNone),
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mBufferMapper(GraphicBufferMapper::get()),
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mInitCheck(NO_ERROR)
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{
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width = w;
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height = h;
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stride = inStride;
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format = inFormat;
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usage = inUsage;
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handle = inHandle;
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}
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GraphicBuffer::GraphicBuffer(ANativeWindowBuffer* buffer, bool keepOwnership)
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: BASE(), mOwner(keepOwnership ? ownHandle : ownNone),
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mBufferMapper(GraphicBufferMapper::get()),
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mInitCheck(NO_ERROR), mWrappedBuffer(buffer)
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{
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width = buffer->width;
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height = buffer->height;
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stride = buffer->stride;
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format = buffer->format;
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usage = buffer->usage;
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handle = buffer->handle;
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}
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GraphicBuffer::~GraphicBuffer()
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{
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if (handle) {
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free_handle();
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}
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}
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void GraphicBuffer::free_handle()
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{
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if (mOwner == ownHandle) {
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mBufferMapper.unregisterBuffer(handle);
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native_handle_close(handle);
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native_handle_delete(const_cast<native_handle*>(handle));
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} else if (mOwner == ownData) {
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GraphicBufferAllocator& allocator(GraphicBufferAllocator::get());
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allocator.free(handle);
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}
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mWrappedBuffer = 0;
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}
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status_t GraphicBuffer::initCheck() const {
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return mInitCheck;
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}
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void GraphicBuffer::dumpAllocationsToSystemLog()
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{
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GraphicBufferAllocator::dumpToSystemLog();
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}
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ANativeWindowBuffer* GraphicBuffer::getNativeBuffer() const
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{
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return static_cast<ANativeWindowBuffer*>(
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const_cast<GraphicBuffer*>(this));
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}
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status_t GraphicBuffer::reallocate(uint32_t w, uint32_t h, PixelFormat f,
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uint32_t reqUsage)
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{
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if (mOwner != ownData)
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return INVALID_OPERATION;
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if (handle && w==width && h==height && f==format && reqUsage==usage)
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return NO_ERROR;
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if (handle) {
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GraphicBufferAllocator& allocator(GraphicBufferAllocator::get());
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allocator.free(handle);
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handle = 0;
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}
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return initSize(w, h, f, reqUsage);
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}
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status_t GraphicBuffer::initSize(uint32_t w, uint32_t h, PixelFormat format,
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uint32_t reqUsage)
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{
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GraphicBufferAllocator& allocator = GraphicBufferAllocator::get();
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status_t err = allocator.alloc(w, h, format, reqUsage, &handle, &stride);
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if (err == NO_ERROR) {
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this->width = w;
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this->height = h;
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this->format = format;
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this->usage = reqUsage;
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}
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return err;
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}
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status_t GraphicBuffer::lock(uint32_t usage, void** vaddr)
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{
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const Rect lockBounds(width, height);
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status_t res = lock(usage, lockBounds, vaddr);
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return res;
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}
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status_t GraphicBuffer::lock(uint32_t usage, const Rect& rect, void** vaddr)
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{
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if (rect.left < 0 || rect.right > this->width ||
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rect.top < 0 || rect.bottom > this->height) {
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ALOGE("locking pixels (%d,%d,%d,%d) outside of buffer (w=%d, h=%d)",
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rect.left, rect.top, rect.right, rect.bottom,
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this->width, this->height);
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return BAD_VALUE;
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}
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status_t res = getBufferMapper().lock(handle, usage, rect, vaddr);
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return res;
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}
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status_t GraphicBuffer::lockYCbCr(uint32_t usage, android_ycbcr *ycbcr)
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{
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const Rect lockBounds(width, height);
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status_t res = lockYCbCr(usage, lockBounds, ycbcr);
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return res;
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}
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status_t GraphicBuffer::lockYCbCr(uint32_t usage, const Rect& rect,
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android_ycbcr *ycbcr)
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{
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if (rect.left < 0 || rect.right > this->width ||
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rect.top < 0 || rect.bottom > this->height) {
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ALOGE("locking pixels (%d,%d,%d,%d) outside of buffer (w=%d, h=%d)",
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rect.left, rect.top, rect.right, rect.bottom,
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this->width, this->height);
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return BAD_VALUE;
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}
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status_t res = getBufferMapper().lockYCbCr(handle, usage, rect, ycbcr);
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return res;
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}
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status_t GraphicBuffer::unlock()
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{
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status_t res = getBufferMapper().unlock(handle);
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return res;
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}
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size_t GraphicBuffer::getFlattenedSize() const {
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return (8 + (handle ? handle->numInts : 0))*sizeof(int);
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}
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size_t GraphicBuffer::getFdCount() const {
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return handle ? handle->numFds : 0;
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}
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status_t GraphicBuffer::flatten(void*& buffer, size_t& size, int*& fds, size_t& count) const {
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size_t sizeNeeded = GraphicBuffer::getFlattenedSize();
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if (size < sizeNeeded) return NO_MEMORY;
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size_t fdCountNeeded = GraphicBuffer::getFdCount();
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if (count < fdCountNeeded) return NO_MEMORY;
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int* buf = static_cast<int*>(buffer);
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buf[0] = 'GBFR';
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buf[1] = width;
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buf[2] = height;
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buf[3] = stride;
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buf[4] = format;
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buf[5] = usage;
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buf[6] = 0;
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buf[7] = 0;
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if (handle) {
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buf[6] = handle->numFds;
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buf[7] = handle->numInts;
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native_handle_t const* const h = handle;
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memcpy(fds, h->data, h->numFds*sizeof(int));
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memcpy(&buf[8], h->data + h->numFds, h->numInts*sizeof(int));
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}
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buffer = reinterpret_cast<void*>(static_cast<int*>(buffer) + sizeNeeded);
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size -= sizeNeeded;
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fds += handle->numFds;
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count -= handle->numFds;
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return NO_ERROR;
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}
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status_t GraphicBuffer::unflatten(
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void const*& buffer, size_t& size, int const*& fds, size_t& count) {
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if (size < 8*sizeof(int)) return NO_MEMORY;
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int const* buf = static_cast<int const*>(buffer);
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if (buf[0] != 'GBFR') return BAD_TYPE;
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const size_t numFds = buf[6];
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const size_t numInts = buf[7];
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// Limit the maxNumber to be relatively small. The number of fds or ints
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// should not come close to this number, and the number itself was simply
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// chosen to be high enough to not cause issues and low enough to prevent
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// overflow problems.
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const size_t maxNumber = 4096;
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if (numFds >= maxNumber || numInts >= (maxNumber - 10)) {
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width = height = stride = format = usage = 0;
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handle = NULL;
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ALOGE("unflatten: numFds or numInts is too large: %d, %d",
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numFds, numInts);
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return BAD_VALUE;
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}
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const size_t sizeNeeded = (8 + numInts) * sizeof(int);
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if (size < sizeNeeded) return NO_MEMORY;
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size_t fdCountNeeded = numFds;
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if (count < fdCountNeeded) return NO_MEMORY;
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if (handle) {
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// free previous handle if any
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free_handle();
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}
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if (numFds || numInts) {
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width = buf[1];
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height = buf[2];
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stride = buf[3];
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format = buf[4];
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usage = buf[5];
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native_handle* h = native_handle_create(numFds, numInts);
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if (!h) {
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width = height = stride = format = usage = 0;
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handle = NULL;
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ALOGE("unflatten: native_handle_create failed");
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return NO_MEMORY;
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}
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memcpy(h->data, fds, numFds*sizeof(int));
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memcpy(h->data + numFds, &buf[8], numInts*sizeof(int));
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handle = h;
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} else {
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width = height = stride = format = usage = 0;
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handle = NULL;
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}
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mOwner = ownHandle;
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if (handle != 0) {
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status_t err = mBufferMapper.registerBuffer(handle);
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if (err != NO_ERROR) {
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ALOGE("unflatten: registerBuffer failed: %s (%d)",
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strerror(-err), err);
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return err;
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}
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}
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buffer = reinterpret_cast<void const*>(static_cast<int const*>(buffer) + sizeNeeded);
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size -= sizeNeeded;
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fds += numFds;
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count -= numFds;
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return NO_ERROR;
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}
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// ---------------------------------------------------------------------------
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}; // namespace android
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