зеркало из https://github.com/mozilla/gecko-dev.git
347 строки
11 KiB
C++
347 строки
11 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* vim: sw=2 ts=8 et :
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*/
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "ISurfaceAllocator.h"
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#include <sys/types.h> // for int32_t
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#include "gfx2DGlue.h" // for IntSize
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#include "gfxPlatform.h" // for gfxPlatform, gfxImageFormat
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#include "gfxSharedImageSurface.h" // for gfxSharedImageSurface
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#include "mozilla/Assertions.h" // for MOZ_ASSERT, etc
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#include "mozilla/Atomics.h" // for PrimitiveIntrinsics
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#include "mozilla/ipc/SharedMemory.h" // for SharedMemory, etc
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#include "mozilla/layers/LayersSurfaces.h" // for SurfaceDescriptor, etc
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#include "mozilla/layers/SharedBufferManagerChild.h"
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#include "ShadowLayerUtils.h"
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#include "mozilla/mozalloc.h" // for operator delete[], etc
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#include "nsAutoPtr.h" // for nsRefPtr, getter_AddRefs, etc
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#include "nsDebug.h" // for NS_RUNTIMEABORT
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#include "nsXULAppAPI.h" // for XRE_GetProcessType, etc
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#include "mozilla/ipc/Shmem.h"
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#include "mozilla/layers/ImageDataSerializer.h"
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#ifdef DEBUG
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#include "prenv.h"
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#endif
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using namespace mozilla::ipc;
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namespace mozilla {
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namespace layers {
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NS_IMPL_ISUPPORTS(GfxMemoryImageReporter, nsIMemoryReporter)
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mozilla::Atomic<size_t> GfxMemoryImageReporter::sAmount(0);
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mozilla::ipc::SharedMemory::SharedMemoryType OptimalShmemType()
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{
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return mozilla::ipc::SharedMemory::TYPE_BASIC;
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}
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bool
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IsSurfaceDescriptorValid(const SurfaceDescriptor& aSurface)
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{
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return aSurface.type() != SurfaceDescriptor::T__None &&
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aSurface.type() != SurfaceDescriptor::Tnull_t;
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}
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ISurfaceAllocator::~ISurfaceAllocator()
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{
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// Check if we're not leaking..
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MOZ_ASSERT(mUsedShmems.empty());
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}
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void
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ISurfaceAllocator::Finalize()
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{
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ShrinkShmemSectionHeap();
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}
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static inline uint8_t*
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GetAddressFromDescriptor(const SurfaceDescriptor& aDescriptor, size_t& aSize)
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{
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MOZ_ASSERT(IsSurfaceDescriptorValid(aDescriptor));
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MOZ_ASSERT(aDescriptor.type() == SurfaceDescriptor::TSurfaceDescriptorShmem ||
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aDescriptor.type() == SurfaceDescriptor::TSurfaceDescriptorMemory);
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if (aDescriptor.type() == SurfaceDescriptor::TSurfaceDescriptorShmem) {
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Shmem shmem(aDescriptor.get_SurfaceDescriptorShmem().data());
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aSize = shmem.Size<uint8_t>();
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return shmem.get<uint8_t>();
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} else {
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const SurfaceDescriptorMemory& image = aDescriptor.get_SurfaceDescriptorMemory();
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aSize = std::numeric_limits<size_t>::max();
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return reinterpret_cast<uint8_t*>(image.data());
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}
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}
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TemporaryRef<gfx::DrawTarget>
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GetDrawTargetForDescriptor(const SurfaceDescriptor& aDescriptor, gfx::BackendType aBackend)
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{
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size_t size;
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uint8_t* data = GetAddressFromDescriptor(aDescriptor, size);
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ImageDataDeserializer image(data, size);
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return image.GetAsDrawTarget(aBackend);
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}
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TemporaryRef<gfx::DataSourceSurface>
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GetSurfaceForDescriptor(const SurfaceDescriptor& aDescriptor)
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{
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size_t size;
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uint8_t* data = GetAddressFromDescriptor(aDescriptor, size);
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ImageDataDeserializer image(data, size);
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return image.GetAsSurface();
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}
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bool
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ISurfaceAllocator::AllocSurfaceDescriptor(const gfx::IntSize& aSize,
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gfxContentType aContent,
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SurfaceDescriptor* aBuffer)
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{
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return AllocSurfaceDescriptorWithCaps(aSize, aContent, DEFAULT_BUFFER_CAPS, aBuffer);
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}
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bool
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ISurfaceAllocator::AllocSurfaceDescriptorWithCaps(const gfx::IntSize& aSize,
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gfxContentType aContent,
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uint32_t aCaps,
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SurfaceDescriptor* aBuffer)
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{
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gfx::SurfaceFormat format =
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gfxPlatform::GetPlatform()->Optimal2DFormatForContent(aContent);
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size_t size = ImageDataSerializer::ComputeMinBufferSize(aSize, format);
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if (!size) {
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return false;
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}
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if (IsSameProcess()) {
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uint8_t *data = new (std::nothrow) uint8_t[size];
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if (!data) {
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return false;
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}
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GfxMemoryImageReporter::DidAlloc(data);
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#ifdef XP_MACOSX
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// Workaround a bug in Quartz where drawing an a8 surface to another a8
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// surface with OPERATOR_SOURCE still requires the destination to be clear.
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if (format == gfx::SurfaceFormat::A8) {
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memset(data, 0, size);
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}
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#endif
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*aBuffer = SurfaceDescriptorMemory((uintptr_t)data, format);
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} else {
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mozilla::ipc::SharedMemory::SharedMemoryType shmemType = OptimalShmemType();
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mozilla::ipc::Shmem shmem;
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if (!AllocUnsafeShmem(size, shmemType, &shmem)) {
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return false;
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}
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*aBuffer = SurfaceDescriptorShmem(shmem, format);
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}
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uint8_t* data = GetAddressFromDescriptor(*aBuffer, size);
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ImageDataSerializer serializer(data, size);
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serializer.InitializeBufferInfo(aSize, format);
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return true;
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}
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/* static */ bool
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ISurfaceAllocator::IsShmem(SurfaceDescriptor* aSurface)
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{
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return aSurface && (aSurface->type() == SurfaceDescriptor::TSurfaceDescriptorShmem);
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}
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void
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ISurfaceAllocator::DestroySharedSurface(SurfaceDescriptor* aSurface)
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{
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MOZ_ASSERT(aSurface);
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if (!aSurface) {
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return;
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}
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if (!IPCOpen()) {
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return;
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}
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switch (aSurface->type()) {
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case SurfaceDescriptor::TSurfaceDescriptorShmem:
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DeallocShmem(aSurface->get_SurfaceDescriptorShmem().data());
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break;
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case SurfaceDescriptor::TSurfaceDescriptorMemory:
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GfxMemoryImageReporter::WillFree((uint8_t*)aSurface->get_SurfaceDescriptorMemory().data());
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delete [] (uint8_t*)aSurface->get_SurfaceDescriptorMemory().data();
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break;
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case SurfaceDescriptor::Tnull_t:
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case SurfaceDescriptor::T__None:
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break;
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default:
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NS_RUNTIMEABORT("surface type not implemented!");
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}
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*aSurface = SurfaceDescriptor();
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}
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// XXX - We should actually figure out the minimum shmem allocation size on
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// a certain platform and use that.
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const uint32_t sShmemPageSize = 4096;
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#ifdef DEBUG
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const uint32_t sSupportedBlockSize = 4;
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#endif
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enum AllocationStatus
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{
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STATUS_ALLOCATED,
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STATUS_FREED
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};
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struct ShmemSectionHeapHeader
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{
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Atomic<uint32_t> mTotalBlocks;
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Atomic<uint32_t> mAllocatedBlocks;
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};
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struct ShmemSectionHeapAllocation
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{
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Atomic<uint32_t> mStatus;
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uint32_t mSize;
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};
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bool
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ISurfaceAllocator::AllocShmemSection(size_t aSize, mozilla::layers::ShmemSection* aShmemSection)
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{
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// For now we only support sizes of 4. If we want to support different sizes
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// some more complicated bookkeeping should be added.
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MOZ_ASSERT(aSize == sSupportedBlockSize);
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MOZ_ASSERT(aShmemSection);
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uint32_t allocationSize = (aSize + sizeof(ShmemSectionHeapAllocation));
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for (size_t i = 0; i < mUsedShmems.size(); i++) {
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ShmemSectionHeapHeader* header = mUsedShmems[i].get<ShmemSectionHeapHeader>();
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if ((header->mAllocatedBlocks + 1) * allocationSize + sizeof(ShmemSectionHeapHeader) < sShmemPageSize) {
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aShmemSection->shmem() = mUsedShmems[i];
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MOZ_ASSERT(mUsedShmems[i].IsWritable());
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break;
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}
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}
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if (!aShmemSection->shmem().IsWritable()) {
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ipc::Shmem tmp;
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if (!AllocUnsafeShmem(sShmemPageSize, ipc::SharedMemory::TYPE_BASIC, &tmp)) {
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return false;
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}
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ShmemSectionHeapHeader* header = tmp.get<ShmemSectionHeapHeader>();
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header->mTotalBlocks = 0;
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header->mAllocatedBlocks = 0;
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mUsedShmems.push_back(tmp);
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aShmemSection->shmem() = tmp;
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}
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MOZ_ASSERT(aShmemSection->shmem().IsWritable());
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ShmemSectionHeapHeader* header = aShmemSection->shmem().get<ShmemSectionHeapHeader>();
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uint8_t* heap = aShmemSection->shmem().get<uint8_t>() + sizeof(ShmemSectionHeapHeader);
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ShmemSectionHeapAllocation* allocHeader = nullptr;
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if (header->mTotalBlocks > header->mAllocatedBlocks) {
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// Search for the first available block.
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for (size_t i = 0; i < header->mTotalBlocks; i++) {
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allocHeader = reinterpret_cast<ShmemSectionHeapAllocation*>(heap);
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if (allocHeader->mStatus == STATUS_FREED) {
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break;
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}
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heap += allocationSize;
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}
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MOZ_ASSERT(allocHeader && allocHeader->mStatus == STATUS_FREED);
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MOZ_ASSERT(allocHeader->mSize == sSupportedBlockSize);
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} else {
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heap += header->mTotalBlocks * allocationSize;
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header->mTotalBlocks++;
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allocHeader = reinterpret_cast<ShmemSectionHeapAllocation*>(heap);
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allocHeader->mSize = aSize;
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}
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MOZ_ASSERT(allocHeader);
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header->mAllocatedBlocks++;
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allocHeader->mStatus = STATUS_ALLOCATED;
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aShmemSection->size() = aSize;
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aShmemSection->offset() = (heap + sizeof(ShmemSectionHeapAllocation)) - aShmemSection->shmem().get<uint8_t>();
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ShrinkShmemSectionHeap();
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return true;
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}
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void
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ISurfaceAllocator::FreeShmemSection(mozilla::layers::ShmemSection& aShmemSection)
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{
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MOZ_ASSERT(aShmemSection.size() == sSupportedBlockSize);
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MOZ_ASSERT(aShmemSection.offset() < sShmemPageSize - sSupportedBlockSize);
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ShmemSectionHeapAllocation* allocHeader =
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reinterpret_cast<ShmemSectionHeapAllocation*>(aShmemSection.shmem().get<char>() +
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aShmemSection.offset() -
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sizeof(ShmemSectionHeapAllocation));
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MOZ_ASSERT(allocHeader->mSize == aShmemSection.size());
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DebugOnly<bool> success = allocHeader->mStatus.compareExchange(STATUS_ALLOCATED, STATUS_FREED);
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// If this fails something really weird is going on.
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MOZ_ASSERT(success);
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ShmemSectionHeapHeader* header = aShmemSection.shmem().get<ShmemSectionHeapHeader>();
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header->mAllocatedBlocks--;
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ShrinkShmemSectionHeap();
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}
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void
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ISurfaceAllocator::ShrinkShmemSectionHeap()
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{
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// The loop will terminate as we either increase i, or decrease size
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// every time through.
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size_t i = 0;
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while (i < mUsedShmems.size()) {
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ShmemSectionHeapHeader* header = mUsedShmems[i].get<ShmemSectionHeapHeader>();
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if (header->mAllocatedBlocks == 0) {
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DeallocShmem(mUsedShmems[i]);
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// We don't particularly care about order, move the last one in the array
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// to this position.
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if (i < mUsedShmems.size() - 1) {
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mUsedShmems[i] = mUsedShmems[mUsedShmems.size() - 1];
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}
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mUsedShmems.pop_back();
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} else {
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i++;
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}
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}
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}
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bool
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ISurfaceAllocator::AllocGrallocBuffer(const gfx::IntSize& aSize,
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uint32_t aFormat,
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uint32_t aUsage,
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MaybeMagicGrallocBufferHandle* aHandle)
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{
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return SharedBufferManagerChild::GetSingleton()->AllocGrallocBuffer(aSize, aFormat, aUsage, aHandle);
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}
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void
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ISurfaceAllocator::DeallocGrallocBuffer(MaybeMagicGrallocBufferHandle* aHandle)
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{
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SharedBufferManagerChild::GetSingleton()->DeallocGrallocBuffer(*aHandle);
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}
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void
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ISurfaceAllocator::DropGrallocBuffer(MaybeMagicGrallocBufferHandle* aHandle)
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{
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SharedBufferManagerChild::GetSingleton()->DropGrallocBuffer(*aHandle);
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}
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} // namespace layers
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} // namespace mozilla
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