forked from mirrors/gecko-dev
143 lines
4.9 KiB
C++
143 lines
4.9 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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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#ifndef GFX_WR_IPCRESOURCEUPDATEQUEUE_H
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#define GFX_WR_IPCRESOURCEUPDATEQUEUE_H
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#include "mozilla/layers/WebRenderMessages.h"
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#include "mozilla/layers/RefCountedShmem.h"
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#include "mozilla/webrender/WebRenderTypes.h"
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namespace mozilla {
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namespace ipc {
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class IShmemAllocator;
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}
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namespace wr {
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/// ShmSegmentsWriter pushes bytes in a sequence of fixed size shmems for small
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/// allocations and creates dedicated shmems for large allocations.
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class ShmSegmentsWriter {
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public:
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ShmSegmentsWriter(layers::WebRenderBridgeChild* aAllocator, size_t aChunkSize);
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~ShmSegmentsWriter();
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layers::OffsetRange Write(Range<uint8_t> aBytes);
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template<typename T>
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layers::OffsetRange WriteAsBytes(Range<T> aValues)
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{
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return Write(Range<uint8_t>((uint8_t*)aValues.begin().get(), aValues.length() * sizeof(T)));
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}
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void Flush(nsTArray<layers::RefCountedShmem>& aSmallAllocs, nsTArray<ipc::Shmem>& aLargeAllocs);
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void Clear();
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bool IsEmpty() const;
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layers::WebRenderBridgeChild* WrBridge() const { return mShmAllocator; }
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protected:
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bool AllocChunk();
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layers::OffsetRange AllocLargeChunk(size_t aSize);
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nsTArray<layers::RefCountedShmem> mSmallAllocs;
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nsTArray<ipc::Shmem> mLargeAllocs;
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layers::WebRenderBridgeChild* mShmAllocator;
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size_t mCursor;
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size_t mChunkSize;
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};
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class ShmSegmentsReader {
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public:
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ShmSegmentsReader(const nsTArray<layers::RefCountedShmem>& aSmallShmems,
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const nsTArray<ipc::Shmem>& aLargeShmems);
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bool Read(const layers::OffsetRange& aRange, wr::Vec<uint8_t>& aInto);
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protected:
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bool ReadLarge(const layers::OffsetRange& aRange, wr::Vec<uint8_t>& aInto);
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const nsTArray<layers::RefCountedShmem>& mSmallAllocs;
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const nsTArray<ipc::Shmem>& mLargeAllocs;
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size_t mChunkSize;
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};
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class IpcResourceUpdateQueue {
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public:
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// Because we are using shmems, the size should be a multiple of the page size.
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// Each shmem has two guard pages, and the minimum shmem size (at least one Windows)
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// is 64k which is already quite large for a lot of the resources we use here.
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// The RefCountedShmem type used to allocate the chunks keeps a 16 bytes header
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// in the buffer which we account for here as well.
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// So we pick 64k - 2 * 4k - 16 = 57328 bytes as the default alloc size.
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explicit IpcResourceUpdateQueue(layers::WebRenderBridgeChild* aAllocator, size_t aChunkSize = 57328);
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bool AddImage(wr::ImageKey aKey,
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const ImageDescriptor& aDescriptor,
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Range<uint8_t> aBytes);
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bool AddBlobImage(wr::ImageKey aKey,
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const ImageDescriptor& aDescriptor,
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Range<uint8_t> aBytes);
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void AddExternalImage(wr::ExternalImageId aExtId, wr::ImageKey aKey);
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void PushExternalImageForTexture(wr::ExternalImageId aExtId,
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wr::ImageKey aKey,
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layers::TextureClient* aTexture,
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bool aIsUpdate);
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bool UpdateImageBuffer(wr::ImageKey aKey,
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const ImageDescriptor& aDescriptor,
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Range<uint8_t> aBytes);
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bool UpdateBlobImage(wr::ImageKey aKey,
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const ImageDescriptor& aDescriptor,
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Range<uint8_t> aBytes,
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ImageIntRect aDirtyRect);
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void UpdateExternalImage(ExternalImageId aExtID,
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ImageKey aKey,
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ImageIntRect aDirtyRect);
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void SetImageVisibleArea(ImageKey aKey, const gfx::Rect& aArea);
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void DeleteImage(wr::ImageKey aKey);
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bool AddRawFont(wr::FontKey aKey, Range<uint8_t> aBytes, uint32_t aIndex);
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bool AddFontDescriptor(wr::FontKey aKey, Range<uint8_t> aBytes, uint32_t aIndex);
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void DeleteFont(wr::FontKey aKey);
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void AddFontInstance(wr::FontInstanceKey aKey,
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wr::FontKey aFontKey,
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float aGlyphSize,
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const wr::FontInstanceOptions* aOptions,
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const wr::FontInstancePlatformOptions* aPlatformOptions,
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Range<const gfx::FontVariation> aVariations);
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void DeleteFontInstance(wr::FontInstanceKey aKey);
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void Clear();
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void Flush(nsTArray<layers::OpUpdateResource>& aUpdates,
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nsTArray<layers::RefCountedShmem>& aSmallAllocs,
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nsTArray<ipc::Shmem>& aLargeAllocs);
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bool IsEmpty() const;
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static void ReleaseShmems(ipc::IProtocol*, nsTArray<layers::RefCountedShmem>& aShmems);
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static void ReleaseShmems(ipc::IProtocol*, nsTArray<ipc::Shmem>& aShmems);
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protected:
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ShmSegmentsWriter mWriter;
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nsTArray<layers::OpUpdateResource> mUpdates;
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};
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} // namespace
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} // namespace
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#endif
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