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gecko-dev/gfx/webrender_bindings/WebRenderAPI.h

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C++
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set sw=2 sts=2 ts=8 et tw=99 : */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef MOZILLA_LAYERS_WEBRENDERAPI_H
#define MOZILLA_LAYERS_WEBRENDERAPI_H
#include <vector>
#include <unordered_map>
#include "mozilla/AlreadyAddRefed.h"
#include "mozilla/layers/SyncObject.h"
#include "mozilla/Range.h"
#include "mozilla/webrender/webrender_ffi.h"
#include "mozilla/webrender/WebRenderTypes.h"
#include "FrameMetrics.h"
#include "GLTypes.h"
#include "Units.h"
namespace mozilla {
namespace widget {
class CompositorWidget;
}
namespace layers {
class CompositorBridgeParentBase;
class WebRenderBridgeParent;
}
namespace wr {
class DisplayListBuilder;
class RendererOGL;
class RendererEvent;
// This isn't part of WR's API, but we define it here to simplify layout's
// logic and data plumbing.
struct Line {
float baseline;
float start;
float end;
float width;
wr::ColorF color;
wr::LineOrientation orientation;
wr::LineStyle style;
};
/// Updates to retained resources such as images and fonts, applied within the
/// same transaction.
class ResourceUpdateQueue {
public:
ResourceUpdateQueue();
~ResourceUpdateQueue();
ResourceUpdateQueue(ResourceUpdateQueue&&);
ResourceUpdateQueue(const ResourceUpdateQueue&) = delete;
ResourceUpdateQueue& operator=(ResourceUpdateQueue&&);
ResourceUpdateQueue& operator=(const ResourceUpdateQueue&) = delete;
void AddImage(wr::ImageKey aKey,
const ImageDescriptor& aDescriptor,
wr::Vec_u8& aBytes);
void AddBlobImage(wr::ImageKey aKey,
const ImageDescriptor& aDescriptor,
wr::Vec_u8& aBytes);
void AddExternalImageBuffer(ImageKey key,
const ImageDescriptor& aDescriptor,
ExternalImageId aHandle);
void AddExternalImage(ImageKey key,
const ImageDescriptor& aDescriptor,
ExternalImageId aExtID,
WrExternalImageBufferType aBufferType,
uint8_t aChannelIndex = 0);
void UpdateImageBuffer(wr::ImageKey aKey,
const ImageDescriptor& aDescriptor,
wr::Vec_u8& aBytes);
void UpdateBlobImage(wr::ImageKey aKey,
const ImageDescriptor& aDescriptor,
wr::Vec_u8& aBytes);
void UpdateExternalImage(ImageKey aKey,
const ImageDescriptor& aDescriptor,
ExternalImageId aExtID,
wr::WrExternalImageBufferType aBufferType,
uint8_t aChannelIndex = 0);
void DeleteImage(wr::ImageKey aKey);
void AddRawFont(wr::FontKey aKey, wr::Vec_u8& aBytes, uint32_t aIndex);
void DeleteFont(wr::FontKey aKey);
void AddFontInstance(wr::FontInstanceKey aKey,
wr::FontKey aFontKey,
float aGlyphSize,
const wr::FontInstanceOptions* aOptions,
const wr::FontInstancePlatformOptions* aPlatformOptions);
void DeleteFontInstance(wr::FontInstanceKey aKey);
void Clear();
// Try to avoid using this when possible.
wr::ResourceUpdates* Raw() { return mUpdates; }
protected:
explicit ResourceUpdateQueue(wr::ResourceUpdates* aUpdates)
: mUpdates(aUpdates) {}
wr::ResourceUpdates* mUpdates;
};
class WebRenderAPI
{
NS_INLINE_DECL_REFCOUNTING(WebRenderAPI);
public:
/// This can be called on the compositor thread only.
static already_AddRefed<WebRenderAPI> Create(layers::CompositorBridgeParentBase* aBridge,
RefPtr<widget::CompositorWidget>&& aWidget,
LayoutDeviceIntSize aSize);
already_AddRefed<WebRenderAPI> Clone();
wr::WindowId GetId() const { return mId; }
void UpdateScrollPosition(const wr::WrPipelineId& aPipelineId,
const layers::FrameMetrics::ViewID& aScrollId,
const wr::LayoutPoint& aScrollPosition);
void GenerateFrame();
void GenerateFrame(const nsTArray<wr::WrOpacityProperty>& aOpacityArray,
const nsTArray<wr::WrTransformProperty>& aTransformArray);
void SetWindowParameters(LayoutDeviceIntSize size);
void SetDisplayList(gfx::Color aBgColor,
Epoch aEpoch,
mozilla::LayerSize aViewportSize,
wr::WrPipelineId pipeline_id,
const wr::LayoutSize& content_size,
wr::BuiltDisplayListDescriptor dl_descriptor,
uint8_t *dl_data,
size_t dl_size,
ResourceUpdateQueue& aResources);
void ClearDisplayList(Epoch aEpoch, wr::WrPipelineId pipeline_id);
void SetRootPipeline(wr::PipelineId aPipeline);
void UpdateResources(ResourceUpdateQueue& aUpdates);
void SetFrameStartTime(const TimeStamp& aTime);
void RunOnRenderThread(UniquePtr<RendererEvent> aEvent);
void Readback(gfx::IntSize aSize, uint8_t *aBuffer, uint32_t aBufferSize);
void Pause();
bool Resume();
wr::WrIdNamespace GetNamespace();
uint32_t GetMaxTextureSize() const { return mMaxTextureSize; }
bool GetUseANGLE() const { return mUseANGLE; }
layers::SyncHandle GetSyncHandle() const { return mSyncHandle; }
protected:
WebRenderAPI(wr::DocumentHandle* aHandle, wr::WindowId aId, uint32_t aMaxTextureSize, bool aUseANGLE, layers::SyncHandle aSyncHandle)
: mDocHandle(aHandle)
, mId(aId)
, mMaxTextureSize(aMaxTextureSize)
, mUseANGLE(aUseANGLE)
, mSyncHandle(aSyncHandle)
{}
~WebRenderAPI();
// Should be used only for shutdown handling
void WaitFlushed();
wr::DocumentHandle* mDocHandle;
wr::WindowId mId;
uint32_t mMaxTextureSize;
bool mUseANGLE;
layers::SyncHandle mSyncHandle;
RefPtr<wr::WebRenderAPI> mRootApi;
friend class DisplayListBuilder;
friend class layers::WebRenderBridgeParent;
};
/// This is a simple C++ wrapper around WrState defined in the rust bindings.
/// We may want to turn this into a direct wrapper on top of WebRenderFrameBuilder
/// instead, so the interface may change a bit.
class DisplayListBuilder {
public:
explicit DisplayListBuilder(wr::PipelineId aId,
const wr::LayoutSize& aContentSize);
DisplayListBuilder(DisplayListBuilder&&) = default;
~DisplayListBuilder();
void Begin(const mozilla::LayerIntSize& aSize);
void End();
void Finalize(wr::LayoutSize& aOutContentSize,
wr::BuiltDisplayList& aOutDisplayList);
void PushStackingContext(const wr::LayoutRect& aBounds, // TODO: We should work with strongly typed rects
const uint64_t& aAnimationId,
const float* aOpacity,
const gfx::Matrix4x4* aTransform,
wr::TransformStyle aTransformStyle,
const gfx::Matrix4x4* aPerspective,
const wr::MixBlendMode& aMixBlendMode,
const nsTArray<wr::WrFilterOp>& aFilters);
void PopStackingContext();
wr::WrClipId DefineClip(const wr::LayoutRect& aClipRect,
const nsTArray<wr::WrComplexClipRegion>* aComplex = nullptr,
const wr::WrImageMask* aMask = nullptr);
void PushClip(const wr::WrClipId& aClipId, bool aRecordInStack = true);
void PopClip(bool aRecordInStack = true);
void PushBuiltDisplayList(wr::BuiltDisplayList &dl);
bool IsScrollLayerDefined(layers::FrameMetrics::ViewID aScrollId) const;
void DefineScrollLayer(const layers::FrameMetrics::ViewID& aScrollId,
const wr::LayoutRect& aContentRect, // TODO: We should work with strongly typed rects
const wr::LayoutRect& aClipRect);
void PushScrollLayer(const layers::FrameMetrics::ViewID& aScrollId);
void PopScrollLayer();
void PushClipAndScrollInfo(const layers::FrameMetrics::ViewID& aScrollId,
const wr::WrClipId* aClipId);
void PopClipAndScrollInfo();
void PushRect(const wr::LayoutRect& aBounds,
const wr::LayoutRect& aClip,
const wr::ColorF& aColor);
void PushLinearGradient(const wr::LayoutRect& aBounds,
const wr::LayoutRect& aClip,
const wr::LayoutPoint& aStartPoint,
const wr::LayoutPoint& aEndPoint,
const nsTArray<wr::GradientStop>& aStops,
wr::ExtendMode aExtendMode,
const wr::LayoutSize aTileSize,
const wr::LayoutSize aTileSpacing);
void PushRadialGradient(const wr::LayoutRect& aBounds,
const wr::LayoutRect& aClip,
const wr::LayoutPoint& aCenter,
const wr::LayoutSize& aRadius,
const nsTArray<wr::GradientStop>& aStops,
wr::ExtendMode aExtendMode,
const wr::LayoutSize aTileSize,
const wr::LayoutSize aTileSpacing);
void PushImage(const wr::LayoutRect& aBounds,
const wr::LayoutRect& aClip,
wr::ImageRendering aFilter,
wr::ImageKey aImage);
void PushImage(const wr::LayoutRect& aBounds,
const wr::LayoutRect& aClip,
const wr::LayoutSize& aStretchSize,
const wr::LayoutSize& aTileSpacing,
wr::ImageRendering aFilter,
wr::ImageKey aImage);
void PushYCbCrPlanarImage(const wr::LayoutRect& aBounds,
const wr::LayoutRect& aClip,
wr::ImageKey aImageChannel0,
wr::ImageKey aImageChannel1,
wr::ImageKey aImageChannel2,
wr::WrYuvColorSpace aColorSpace,
wr::ImageRendering aFilter);
void PushNV12Image(const wr::LayoutRect& aBounds,
const wr::LayoutRect& aClip,
wr::ImageKey aImageChannel0,
wr::ImageKey aImageChannel1,
wr::WrYuvColorSpace aColorSpace,
wr::ImageRendering aFilter);
void PushYCbCrInterleavedImage(const wr::LayoutRect& aBounds,
const wr::LayoutRect& aClip,
wr::ImageKey aImageChannel0,
wr::WrYuvColorSpace aColorSpace,
wr::ImageRendering aFilter);
void PushIFrame(const wr::LayoutRect& aBounds,
wr::PipelineId aPipeline);
// XXX WrBorderSides are passed with Range.
// It is just to bypass compiler bug. See Bug 1357734.
void PushBorder(const wr::LayoutRect& aBounds,
const wr::LayoutRect& aClip,
const wr::BorderWidths& aWidths,
const Range<const wr::BorderSide>& aSides,
const wr::BorderRadius& aRadius);
void PushBorderImage(const wr::LayoutRect& aBounds,
const wr::LayoutRect& aClip,
const wr::BorderWidths& aWidths,
wr::ImageKey aImage,
const wr::NinePatchDescriptor& aPatch,
const wr::SideOffsets2D_f32& aOutset,
const wr::RepeatMode& aRepeatHorizontal,
const wr::RepeatMode& aRepeatVertical);
void PushBorderGradient(const wr::LayoutRect& aBounds,
const wr::LayoutRect& aClip,
const wr::BorderWidths& aWidths,
const wr::LayoutPoint& aStartPoint,
const wr::LayoutPoint& aEndPoint,
const nsTArray<wr::GradientStop>& aStops,
wr::ExtendMode aExtendMode,
const wr::SideOffsets2D_f32& aOutset);
void PushBorderRadialGradient(const wr::LayoutRect& aBounds,
const wr::LayoutRect& aClip,
const wr::BorderWidths& aWidths,
const wr::LayoutPoint& aCenter,
const wr::LayoutSize& aRadius,
const nsTArray<wr::GradientStop>& aStops,
wr::ExtendMode aExtendMode,
const wr::SideOffsets2D_f32& aOutset);
void PushText(const wr::LayoutRect& aBounds,
const wr::LayoutRect& aClip,
const gfx::Color& aColor,
wr::FontInstanceKey aFontKey,
Range<const wr::GlyphInstance> aGlyphBuffer,
const wr::GlyphOptions* aGlyphOptions = nullptr);
void PushLine(const wr::LayoutRect& aClip,
const wr::Line& aLine);
void PushTextShadow(const wr::LayoutRect& aBounds,
const wr::LayoutRect& aClip,
const wr::TextShadow& aShadow);
void PopTextShadow();
void PushBoxShadow(const wr::LayoutRect& aRect,
const wr::LayoutRect& aClip,
const wr::LayoutRect& aBoxBounds,
const wr::LayoutVector2D& aOffset,
const wr::ColorF& aColor,
const float& aBlurRadius,
const float& aSpreadRadius,
const float& aBorderRadius,
const wr::BoxShadowClipMode& aClipMode);
// Returns the clip id that was most recently pushed with PushClip and that
// has not yet been popped with PopClip. Return Nothing() if the clip stack
// is empty.
Maybe<wr::WrClipId> TopmostClipId();
// Same as TopmostClipId() but for scroll layers.
layers::FrameMetrics::ViewID TopmostScrollId();
// Returns the scroll id that was pushed just before the given scroll id. This
// function returns Nothing() if the given scrollid has not been encountered,
// or if it is the rootmost scroll id (and therefore has no ancestor).
Maybe<layers::FrameMetrics::ViewID> ParentScrollIdFor(layers::FrameMetrics::ViewID aScrollId);
// Try to avoid using this when possible.
wr::WrState* Raw() { return mWrState; }
protected:
wr::WrState* mWrState;
// Track the stack of clip ids and scroll layer ids that have been pushed
// (by PushClip and PushScrollLayer, respectively) and are still active.
// This is helpful for knowing e.g. what the ancestor scroll id of a particular
// scroll id is, and doing other "queries" of current state.
std::vector<wr::WrClipId> mClipIdStack;
std::vector<layers::FrameMetrics::ViewID> mScrollIdStack;
// Track the parent scroll id of each scroll id that we encountered. A
// Nothing() value indicates a root scroll id. We also use this structure to
// ensure that we don't define a particular scroll layer multiple times.
std::unordered_map<layers::FrameMetrics::ViewID, Maybe<layers::FrameMetrics::ViewID>> mScrollParents;
friend class WebRenderAPI;
};
Maybe<wr::ImageFormat>
SurfaceFormatToImageFormat(gfx::SurfaceFormat aFormat);
} // namespace wr
} // namespace mozilla
#endif
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