зеркало из https://github.com/mozilla/gecko-dev.git
94 строки
3.2 KiB
Plaintext
94 строки
3.2 KiB
Plaintext
/* -*- 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 LayersSurfaces;
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include LayersMessages;
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include protocol PCompositable;
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include protocol PCompositor;
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include protocol PGrallocBuffer;
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include protocol PLayer;
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include protocol PRenderFrame;
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include protocol PTexture;
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include "mozilla/GfxMessageUtils.h";
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using struct mozilla::layers::TextureInfo from "mozilla/layers/CompositorTypes.h";
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/**
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* The layers protocol is spoken between thread contexts that manage
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* layer (sub)trees. The protocol comprises atomically publishing
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* layer subtrees to a "shadow" thread context (which grafts the
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* subtree into its own tree), and atomically updating a published
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* subtree. ("Atomic" in this sense is wrt painting.)
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*/
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namespace mozilla {
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namespace layers {
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sync protocol PLayerTransaction {
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manager PRenderFrame or PCompositor;
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manages PLayer;
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manages PCompositable;
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manages PGrallocBuffer;
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manages PTexture;
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parent:
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/**
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* Only the parent side has privileges to allocate the buffer.
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* Allocation may fail (pmem is a scarce resource), and if so null_t
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* is returned.
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*
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* |format| is an Android PixelFormat (see PixelFormat.h)
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*
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* commonly used PixelFormats are:
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* PIXEL_FORMAT_RGBA_8888
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* PIXEL_FORMAT_RGBX_8888
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* PIXEL_FORMAT_BGRA_8888
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*
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* Note that SurfaceDescriptorGralloc has a "isRBSwapped" boolean
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* that can treat the R/B bytes as swapped when they are rendered
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* to the screen, to help with matching the native pixel format
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* of other rendering engines.
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*
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* |usage| is a USAGE_* mask (see GraphicBuffer.h)
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*
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* commonly used USAGE flags are:
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* USAGE_SW_READ_OFTEN | USAGE_SW_WRITE_OFTEN | USAGE_HW_TEXTURE
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* - used for software rendering to a buffer which the compositor
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* treats as a texture
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* USAGE_HW_RENDER | USAGE_HW_TEXTURE
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* - used for GL rendering to a buffer which the compositor
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* treats as a texture
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*/
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sync PGrallocBuffer(IntSize size, uint32_t format, uint32_t usage)
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returns (MaybeMagicGrallocBufferHandle handle);
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async PLayer();
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async PCompositable(TextureInfo aTextureInfo);
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async PTexture(SurfaceDescriptor aSharedData, uint32_t aTextureFlags);
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// The isFirstPaint flag can be used to indicate that this is the first update
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// for a particular document.
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sync Update(Edit[] cset, TargetConfig targetConfig, bool isFirstPaint, bool scheduleComposite)
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returns (EditReply[] reply);
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sync GetOpacity(PLayer layer) returns (float opacity);
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sync GetTransform(PLayer layer) returns (gfx3DMatrix transform);
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// We don't need to send a sync transaction if
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// no transaction operate require a swap.
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async UpdateNoSwap(Edit[] cset, TargetConfig targetConfig, bool isFirstPaint, bool scheduleComposite);
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// Drop any front buffers that might be retained on the compositor
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// side.
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async ClearCachedResources();
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async __delete__();
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};
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} // namespace layers
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} // namespace mozilla
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