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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 GFX_LAYERSTYPES_H
#define GFX_LAYERSTYPES_H
#include <iosfwd> // for ostream
#include <stdint.h> // for uint32_t
#include <stdio.h> // FILE
#include <tuple>
#include "Units.h"
#include "mozilla/DefineEnum.h" // for MOZ_DEFINE_ENUM_CLASS_WITH_BASE
#include "mozilla/Maybe.h"
#include "mozilla/TimeStamp.h" // for TimeStamp
#include "nsRegion.h"
#include "mozilla/EnumSet.h"
#ifndef MOZ_LAYERS_HAVE_LOG
# define MOZ_LAYERS_HAVE_LOG
#endif
#define MOZ_LAYERS_LOG(_args) \
MOZ_LOG(LayerManager::GetLog(), LogLevel::Debug, _args)
#define MOZ_LAYERS_LOG_IF_SHADOWABLE(layer, _args)
#define INVALID_OVERLAY -1
//#define ENABLE_FRAME_LATENCY_LOG
namespace IPC {
template <typename T>
struct ParamTraits;
} // namespace IPC
namespace mozilla {
enum class StyleBorderStyle : uint8_t;
namespace layers {
class TextureHost;
#undef NONE
#undef OPAQUE
struct LayersId {
uint64_t mId = 0;
bool IsValid() const { return mId != 0; }
// Allow explicit cast to a uint64_t for now
explicit operator uint64_t() const { return mId; }
// Implement some operators so this class can be used as a key in
// stdlib classes.
bool operator<(const LayersId& aOther) const { return mId < aOther.mId; }
bool operator==(const LayersId& aOther) const { return mId == aOther.mId; }
bool operator!=(const LayersId& aOther) const { return !(*this == aOther); }
friend std::ostream& operator<<(std::ostream& aStream, const LayersId& aId);
// Helper struct that allow this class to be used as a key in
// std::unordered_map like so:
// std::unordered_map<LayersId, ValueType, LayersId::HashFn> myMap;
struct HashFn {
std::size_t operator()(const LayersId& aKey) const {
return std::hash<uint64_t>{}(aKey.mId);
}
};
};
template <typename T>
struct BaseTransactionId {
uint64_t mId = 0;
bool IsValid() const { return mId != 0; }
[[nodiscard]] BaseTransactionId<T> Next() const {
return BaseTransactionId<T>{mId + 1};
}
[[nodiscard]] BaseTransactionId<T> Prev() const {
return BaseTransactionId<T>{mId - 1};
}
int64_t operator-(const BaseTransactionId<T>& aOther) const {
return mId - aOther.mId;
}
// Allow explicit cast to a uint64_t for now
explicit operator uint64_t() const { return mId; }
bool operator<(const BaseTransactionId<T>& aOther) const {
return mId < aOther.mId;
}
bool operator<=(const BaseTransactionId<T>& aOther) const {
return mId <= aOther.mId;
}
bool operator>(const BaseTransactionId<T>& aOther) const {
return mId > aOther.mId;
}
bool operator>=(const BaseTransactionId<T>& aOther) const {
return mId >= aOther.mId;
}
bool operator==(const BaseTransactionId<T>& aOther) const {
return mId == aOther.mId;
}
bool operator!=(const BaseTransactionId<T>& aOther) const {
return mId != aOther.mId;
}
};
class TransactionIdType {};
typedef BaseTransactionId<TransactionIdType> TransactionId;
struct LayersObserverEpoch {
uint64_t mId;
[[nodiscard]] LayersObserverEpoch Next() const {
return LayersObserverEpoch{mId + 1};
}
bool operator<=(const LayersObserverEpoch& aOther) const {
return mId <= aOther.mId;
}
bool operator>=(const LayersObserverEpoch& aOther) const {
return mId >= aOther.mId;
}
bool operator==(const LayersObserverEpoch& aOther) const {
return mId == aOther.mId;
}
bool operator!=(const LayersObserverEpoch& aOther) const {
return mId != aOther.mId;
}
};
// CompositionOpportunityId is a counter that goes up every time we have an
// opportunity to composite. It increments even on no-op composites (if nothing
// has changed) and while compositing is paused. It does not skip values if a
// composite is delayed. It is meaningful per window.
// This counter is used to differentiate intentionally-skipped video frames from
// unintentionally-skipped video frames: If CompositionOpportunityIds are
// observed by the video in +1 increments, then the video was onscreen the
// entire time and compositing was not paused. But if gaps in
// CompositionOpportunityIds are observed, that must mean that the video was not
// considered during some composition opportunities, because compositing was
// paused or because the video was not part of the on-screen scene.
class CompositionOpportunityType {};
typedef BaseTransactionId<CompositionOpportunityType> CompositionOpportunityId;
/// We make different decisions about resource allocation sizes in WebRender
/// depending on whether we are going to render web pages or simpler
/// content in the window.
enum class WindowKind : int8_t { MAIN = 0, SECONDARY, LAST };
enum class LayersBackend : int8_t { LAYERS_NONE = 0, LAYERS_WR, LAYERS_LAST };
enum class WebRenderBackend : int8_t { HARDWARE = 0, SOFTWARE, LAST };
enum class WebRenderCompositor : int8_t {
DRAW = 0,
DIRECT_COMPOSITION,
CORE_ANIMATION,
SOFTWARE,
D3D11,
OPENGL,
WAYLAND,
LAST
};
const char* GetLayersBackendName(LayersBackend aBackend);
enum class TextureType : int8_t {
Unknown = 0,
D3D11,
MacIOSurface,
AndroidNativeWindow,
AndroidHardwareBuffer,
DMABUF,
EGLImage,
Last
};
enum class BufferMode : int8_t { BUFFER_NONE, BUFFERED };
enum class DrawRegionClip : int8_t { DRAW, NONE };
enum class SurfaceMode : int8_t {
SURFACE_NONE = 0,
SURFACE_OPAQUE,
SURFACE_SINGLE_CHANNEL_ALPHA,
SURFACE_COMPONENT_ALPHA
};
// clang-format off
MOZ_DEFINE_ENUM_CLASS_WITH_BASE(
ScaleMode, int8_t, (
SCALE_NONE,
STRETCH
// Unimplemented - PRESERVE_ASPECT_RATIO_CONTAIN
));
// clang-format on
// Bit flags that go on a RefLayer and override the
// event regions in the entire subtree below. This is needed for propagating
// various flags across processes since the child-process layout code doesn't
// know about parent-process listeners or CSS rules.
enum EventRegionsOverride {
// The default, no flags set
NoOverride = 0,
// Treat all hit regions in the subtree as dispatch-to-content
ForceDispatchToContent = (1 << 0),
// Treat all hit regions in the subtree as empty
ForceEmptyHitRegion = (1 << 1),
// OR union of all valid bit flags, for use in BitFlagsEnumSerializer
ALL_BITS = (1 << 2) - 1
};
MOZ_ALWAYS_INLINE EventRegionsOverride operator|(EventRegionsOverride a,
EventRegionsOverride b) {
return (EventRegionsOverride)((int)a | (int)b);
}
MOZ_ALWAYS_INLINE EventRegionsOverride& operator|=(EventRegionsOverride& a,
EventRegionsOverride b) {
a = a | b;
return a;
}
// Flags used as an argument to functions that dump textures.
enum TextureDumpMode {
Compress, // dump texture with LZ4 compression
DoNotCompress // dump texture uncompressed
};
typedef uint32_t TouchBehaviorFlags;
// Some specialized typedefs of Matrix4x4Typed.
typedef gfx::Matrix4x4Typed<LayerPixel, CSSTransformedLayerPixel>
CSSTransformMatrix;
// Several different async transforms can contribute to a layer's transform
// (specifically, an async animation can contribute a transform, and each APZC
// that scrolls a layer can contribute async scroll/zoom and overscroll
// transforms).
// To try to model this with typed units, we represent individual async
// transforms as ParentLayer -> ParentLayer transforms (aliased as
// AsyncTransformComponentMatrix), and we represent the product of all of them
// as a CSSTransformLayer -> ParentLayer transform (aliased as
// AsyncTransformMatrix). To create an AsyncTransformMatrix from component
// matrices, a ViewAs operation is needed. A MultipleAsyncTransforms
// PixelCastJustification is provided for this purpose.
typedef gfx::Matrix4x4Typed<ParentLayerPixel, ParentLayerPixel>
AsyncTransformComponentMatrix;
typedef gfx::Matrix4x4Typed<CSSTransformedLayerPixel, ParentLayerPixel>
AsyncTransformMatrix;
typedef Array<gfx::DeviceColor, 4> BorderColors;
typedef Array<LayerSize, 4> BorderCorners;
typedef Array<LayerCoord, 4> BorderWidths;
typedef Array<StyleBorderStyle, 4> BorderStyles;
typedef Maybe<LayerRect> MaybeLayerRect;
// This is used to communicate Layers across IPC channels. The Handle is valid
// for layers in the same PLayerTransaction. Handles are created by
// ClientLayerManager, and are cached in LayerTransactionParent on first use.
class LayerHandle final {
friend struct IPC::ParamTraits<mozilla::layers::LayerHandle>;
public:
LayerHandle() : mHandle(0) {}
LayerHandle(const LayerHandle& aOther) = default;
explicit LayerHandle(uint64_t aHandle) : mHandle(aHandle) {}
bool IsValid() const { return mHandle != 0; }
explicit operator bool() const { return IsValid(); }
bool operator==(const LayerHandle& aOther) const {
return mHandle == aOther.mHandle;
}
uint64_t Value() const { return mHandle; }
private:
uint64_t mHandle;
};
// This is used to communicate Compositables across IPC channels. The Handle is
// valid for layers in the same PLayerTransaction or PImageBridge. Handles are
// created by ClientLayerManager or ImageBridgeChild, and are cached in the
// parent side on first use.
class CompositableHandle final {
friend struct IPC::ParamTraits<mozilla::layers::CompositableHandle>;
public:
static CompositableHandle GetNext();
CompositableHandle() : mHandle(0) {}
CompositableHandle(const CompositableHandle& aOther) = default;
explicit CompositableHandle(uint64_t aHandle) : mHandle(aHandle) {}
bool IsValid() const { return mHandle != 0; }
explicit operator bool() const { return IsValid(); }
explicit operator uint64_t() const { return mHandle; }
bool operator==(const CompositableHandle& aOther) const {
return mHandle == aOther.mHandle;
}
bool operator!=(const CompositableHandle& aOther) const {
return !(*this == aOther);
}
uint64_t Value() const { return mHandle; }
private:
uint64_t mHandle;
};
enum class CompositableHandleOwner : uint8_t {
WebRenderBridge,
ImageBridge,
InProcessManager,
};
struct RemoteTextureId {
uint64_t mId = 0;
auto MutTiedFields() { return std::tie(mId); }
static RemoteTextureId GetNext();
bool IsValid() const { return mId != 0; }
// Allow explicit cast to a uint64_t for now
explicit operator uint64_t() const { return mId; }
// Implement some operators so this class can be used as a key in
// stdlib classes.
bool operator<(const RemoteTextureId& aOther) const {
return mId < aOther.mId;
}
bool operator>(const RemoteTextureId& aOther) const {
return mId > aOther.mId;
}
bool operator==(const RemoteTextureId& aOther) const {
return mId == aOther.mId;
}
bool operator!=(const RemoteTextureId& aOther) const {
return !(*this == aOther);
}
// Helper struct that allow this class to be used as a key in
// std::unordered_map like so:
// std::unordered_map<RemoteTextureId, ValueType, RemoteTextureId::HashFn>
// myMap;
struct HashFn {
std::size_t operator()(const RemoteTextureId aKey) const {
return std::hash<uint64_t>{}(aKey.mId);
}
};
};
struct RemoteTextureOwnerId {
uint64_t mId = 0;
auto MutTiedFields() { return std::tie(mId); }
static RemoteTextureOwnerId GetNext();
bool IsValid() const { return mId != 0; }
// Allow explicit cast to a uint64_t for now
explicit operator uint64_t() const { return mId; }
// Implement some operators so this class can be used as a key in
// stdlib classes.
bool operator<(const RemoteTextureOwnerId& aOther) const {
return mId < aOther.mId;
}
bool operator==(const RemoteTextureOwnerId& aOther) const {
return mId == aOther.mId;
}
bool operator!=(const RemoteTextureOwnerId& aOther) const {
return !(*this == aOther);
}
// Helper struct that allow this class to be used as a key in
// std::unordered_map like so:
// std::unordered_map<RemoteTextureOwnerId, ValueType,
// RemoteTextureOwnerId::HashFn> myMap;
struct HashFn {
std::size_t operator()(const RemoteTextureOwnerId aKey) const {
return std::hash<uint64_t>{}(aKey.mId);
}
};
};
// clang-format off
MOZ_DEFINE_ENUM_CLASS_WITH_BASE(ScrollDirection, uint8_t, (
eVertical,
eHorizontal
));
using ScrollDirections = EnumSet<ScrollDirection, uint8_t>;
constexpr ScrollDirections EitherScrollDirection(ScrollDirection::eVertical,ScrollDirection::eHorizontal);
constexpr ScrollDirections HorizontalScrollDirection(ScrollDirection::eHorizontal);
constexpr ScrollDirections VerticalScrollDirection(ScrollDirection::eVertical);
MOZ_DEFINE_ENUM_CLASS_WITH_BASE(CompositionPayloadType, uint8_t, (
/**
* A |CompositionPayload| with this type indicates a key press happened
* before composition and will be used to determine latency between key press
* and presentation in |mozilla::Telemetry::KEYPRESS_PRESENT_LATENCY|
*/
eKeyPress,
/**
* A |CompositionPayload| with this type indicates that an APZ scroll event
* occurred that will be included in the composition.
*/
eAPZScroll,
/**
* A |CompositionPayload| with this type indicates that an APZ pinch-to-zoom
* event occurred that will be included in the composition.
*/
eAPZPinchZoom,
/**
* A |CompositionPayload| with this type indicates that content was painted
* that will be included in the composition.
*/
eContentPaint,
/**
* A |CompositionPayload| with this type indicates a mouse up (which caused
* a click to happen) happened before composition and will be used to determine latency
* between mouse up and presentation in
* |mozilla::Telemetry::MOUSEUP_FOLLOWED_BY_CLICK_PRESENT_LATENCY|
*/
eMouseUpFollowedByClick
));
// clang-format on
extern const char* kCompositionPayloadTypeNames[kCompositionPayloadTypeCount];
struct CompositionPayload {
bool operator==(const CompositionPayload& aOther) const {
return mType == aOther.mType && mTimeStamp == aOther.mTimeStamp;
}
/* The type of payload that is in this composition */
CompositionPayloadType mType;
/* When this payload was generated */
TimeStamp mTimeStamp;
};
} // namespace layers
} // namespace mozilla
#endif /* GFX_LAYERSTYPES_H */