gecko-dev/gfx/layers/ipc/LayersMessages.ipdlh

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 * vim: sw=2 ts=8 et :
 */
/* 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/. */

include LayersSurfaces;
include protocol PCompositable;
include protocol PCompositorBridge;
include protocol PLayer;
include protocol PImageContainer;
include protocol PRenderFrame;
include protocol PTexture;

include "gfxipc/ShadowLayerUtils.h";
include "mozilla/GfxMessageUtils.h";
include "ImageLayers.h";

using mozilla::gfx::SamplingFilter from "mozilla/gfx/2D.h";
using struct mozilla::gfx::Color from "mozilla/gfx/2D.h";
using struct mozilla::gfx::Point3D from "mozilla/gfx/Point.h";
using mozilla::gfx::IntPoint from "mozilla/gfx/Point.h";
using class mozilla::gfx::Matrix4x4 from "mozilla/gfx/Matrix.h";
using nscoord from "nsCoord.h";
using struct nsRect from "nsRect.h";
using struct nsPoint from "nsPoint.h";
using class mozilla::TimeDuration from "mozilla/TimeStamp.h";
using class mozilla::TimeStamp from "mozilla/TimeStamp.h";
using mozilla::ScreenRotation from "mozilla/WidgetUtils.h";
using nsCSSPropertyID from "nsCSSPropertyID.h";
using mozilla::dom::ScreenOrientationInternal from "mozilla/dom/ScreenOrientation.h";
using struct mozilla::layers::TextureInfo from "mozilla/layers/CompositorTypes.h";
using mozilla::LayerMargin from "Units.h";
using mozilla::LayerPoint from "Units.h";
using mozilla::LayerRect from "Units.h";
using mozilla::LayerIntRegion from "Units.h";
using mozilla::ParentLayerIntRect from "Units.h";
using mozilla::LayoutDeviceIntRect from "Units.h";
using mozilla::layers::ScaleMode from "mozilla/layers/LayersTypes.h";
using mozilla::layers::EventRegions from "mozilla/layers/LayersTypes.h";
using mozilla::layers::EventRegionsOverride from "mozilla/layers/LayersTypes.h";
using mozilla::layers::DiagnosticTypes from "mozilla/layers/CompositorTypes.h";
using struct mozilla::layers::ScrollMetadata from "FrameMetrics.h";
using mozilla::layers::FrameMetrics::ViewID from "FrameMetrics.h";
using mozilla::layers::LayersBackend from "mozilla/layers/LayersTypes.h";
using mozilla::layers::MaybeLayerClip from "FrameMetrics.h";

namespace mozilla {
namespace layers {

struct TargetConfig {
  IntRect naturalBounds;
  ScreenRotation rotation;
  ScreenOrientationInternal orientation;
  nsIntRegion clearRegion;
};

// Create a shadow layer for |layer|
struct OpCreatePaintedLayer    { PLayer layer; };
struct OpCreateContainerLayer  { PLayer layer; };
struct OpCreateImageLayer      { PLayer layer; };
struct OpCreateColorLayer      { PLayer layer; };
struct OpCreateCanvasLayer     { PLayer layer; };
struct OpCreateRefLayer        { PLayer layer; };

struct OpAttachCompositable {
  PLayer layer;
  PCompositable compositable;
};

struct OpAttachAsyncCompositable {
  PLayer layer;
  uint64_t containerID;
};

struct ThebesBufferData {
  IntRect rect;
  IntPoint rotation;
};

struct CubicBezierFunction {
  float x1;
  float y1;
  float x2;
  float y2;
};

struct StepFunction {
  int steps;
  // 1 = nsTimingFunction::StepStart, 2 = nsTimingFunction::StepEnd
  int type;
};

union TimingFunction {
  null_t;
  CubicBezierFunction;
  StepFunction;
};

// Send the angle with units rather than sending all angles in radians
// to avoid having floating point error introduced by unit switching.
struct CSSAngle {
  float value;
  int unit; // an nsCSSUnit that is valid for angles
};

struct LayerColor { Color value; };
struct Perspective { float value; };
struct RotationX { CSSAngle angle; };
struct RotationY { CSSAngle angle; };
struct RotationZ { CSSAngle angle; };
struct Rotation { CSSAngle angle; };
struct Rotation3D {
  float x;
  float y;
  float z;
  CSSAngle angle;
};
struct Scale {
  float x;
  float y;
  float z;
};
struct Skew { CSSAngle x; CSSAngle y; };
struct SkewX { CSSAngle x; };
struct SkewY { CSSAngle y; };
struct TransformMatrix { Matrix4x4 value; };
struct Translation {
  float x;
  float y;
  float z;
};

union TransformFunction {
  Perspective;
  RotationX;
  RotationY;
  RotationZ;
  Rotation;
  Rotation3D;
  Scale;
  Skew;
  SkewX;
  SkewY;
  Translation;
  TransformMatrix;
};

union Animatable {
  float;
  TransformFunction[];
};

struct AnimationSegment {
  Animatable startState;
  Animatable endState;
  float startPortion;
  float endPortion;
  TimingFunction sampleFn;
};

// Transforms need extra information to correctly convert the list of transform
// functions to a Matrix4x4 that can be applied directly to the layer.
struct TransformData {
  // the origin of the frame being transformed in app units
  nsPoint origin;
  // the transform-origin property for the transform in device pixels
  Point3D transformOrigin;
  nsRect bounds;
  int32_t appUnitsPerDevPixel;
};

union AnimationData {
  null_t;
  TransformData;
};

struct Animation {
  TimeStamp startTime;
  TimeDuration delay;
  // The value of the animation's current time at the moment it was created.
  // For animations that are waiting to start, their startTime will be null.
  // Once the animation is ready to start, we calculate an appropriate value
  // of startTime such that we begin playback from initialCurrentTime.
  TimeDuration initialCurrentTime;
  TimeDuration duration;
  // For each frame, the interpolation point is computed based on the
  // startTime, the direction, the duration, and the current time.
  // The segments must uniquely cover the portion from 0.0 to 1.0
  AnimationSegment[] segments;
  // Number of times to repeat the animation, including positive infinity.
  // Values <= 0 mean the animation will not play (although events are still
  // dispatched on the main thread).
  float iterations;
  float iterationStart;
  // This uses the NS_STYLE_ANIMATION_DIRECTION_* constants.
  uint8_t direction;
  // This uses dom::FillMode.
  uint8_t fillMode;
  nsCSSPropertyID property;
  AnimationData data;
  float playbackRate;
  // This is used in the transformed progress calculation.
  TimingFunction easingFunction;
  uint8_t iterationComposite;
};

// Change a layer's attributes
struct CommonLayerAttributes {
  IntRect layerBounds;
  LayerIntRegion visibleRegion;
  EventRegions eventRegions;
  TransformMatrix transform;
  bool transformIsPerspective;
  float postXScale;
  float postYScale;
  uint32_t contentFlags;
  float opacity;
  bool useClipRect;
  ParentLayerIntRect clipRect;
  MaybeLayerClip scrolledClip;
  bool isFixedPosition;
  uint64_t fixedPositionScrollContainerId;
  LayerPoint fixedPositionAnchor;
  int32_t fixedPositionSides;
  bool isStickyPosition;
  uint64_t stickyScrollContainerId;
  LayerRect stickyScrollRangeOuter;
  LayerRect stickyScrollRangeInner;
  uint64_t scrollbarTargetContainerId;
  uint32_t scrollbarDirection;
  float scrollbarThumbRatio;
  bool isScrollbarContainer;
  int8_t mixBlendMode;
  bool forceIsolatedGroup;
  nullable PLayer maskLayer;
  PLayer[] ancestorMaskLayers;
  // Animated colors will only honored for ColorLayers.
  Animation[] animations;
  nsIntRegion invalidRegion;
  ScrollMetadata[] scrollMetadata;
  nsCString displayListLog;
};

struct PaintedLayerAttributes {
  nsIntRegion validRegion;
};
struct ContainerLayerAttributes {
  float preXScale;
  float preYScale;
  float inheritedXScale;
  float inheritedYScale;
  float presShellResolution;
  bool scaleToResolution;
  EventRegionsOverride eventRegionsOverride;
};
struct ColorLayerAttributes     { LayerColor color; IntRect bounds; };
struct CanvasLayerAttributes    { SamplingFilter samplingFilter; IntRect bounds; };
struct RefLayerAttributes {
  int64_t id;
  // TODO: Once bug 1132895 is fixed we shouldn't need to propagate the override
  // explicitly here.
  EventRegionsOverride eventRegionsOverride;
};
struct ImageLayerAttributes     { SamplingFilter samplingFilter; IntSize scaleToSize; ScaleMode scaleMode; };

union SpecificLayerAttributes {
  null_t;
  PaintedLayerAttributes;
  ContainerLayerAttributes;
  ColorLayerAttributes;
  CanvasLayerAttributes;
  RefLayerAttributes;
  ImageLayerAttributes;
};

struct LayerAttributes {
  CommonLayerAttributes common;
  SpecificLayerAttributes specific;
};

// See nsIWidget Configurations
struct PluginWindowData {
  uintptr_t windowId;
  LayoutDeviceIntRect[] clip;
  LayoutDeviceIntRect bounds;
  bool visible;
};

struct OpSetLayerAttributes {
  PLayer layer;
  LayerAttributes attrs;
};

// Monkey with the tree structure
struct OpSetRoot          { PLayer root; };
struct OpInsertAfter      { PLayer container; PLayer childLayer; PLayer after; };
struct OpPrependChild     { PLayer container; PLayer childLayer; };
struct OpRemoveChild      { PLayer container; PLayer childLayer; };
struct OpRepositionChild  { PLayer container; PLayer childLayer; PLayer after; };
struct OpRaiseToTopChild  { PLayer container; PLayer childLayer; };

struct OpSetDiagnosticTypes { DiagnosticTypes diagnostics; };
struct OpWindowOverlayChanged { };

struct ShmemSection {
  Shmem shmem;
  uint32_t offset;
  size_t size;
};

union ReadLockDescriptor {
  ShmemSection;
  uintptr_t;
  null_t;
};

union MaybeTexture {
  PTexture;
  null_t;
};

struct TexturedTileDescriptor {
  PTexture texture;
  MaybeTexture textureOnWhite;
  IntRect updateRect;
  ReadLockDescriptor sharedLock;
  ReadLockDescriptor sharedLockOnWhite;
  bool wasPlaceholder;
};

struct PlaceholderTileDescriptor {
};

union TileDescriptor {
  TexturedTileDescriptor;
  PlaceholderTileDescriptor;
};

struct SurfaceDescriptorTiles {
  nsIntRegion validRegion;
  TileDescriptor[] tiles;
  IntPoint    tileOrigin;
  IntSize     tileSize;
  int         firstTileX;
  int         firstTileY;
  int         retainedWidth;
  int         retainedHeight;
  float       resolution;
  float       frameXResolution;
  float       frameYResolution;
  bool        isProgressive;
};

struct OpUseTiledLayerBuffer {
  SurfaceDescriptorTiles tileLayerDescriptor;
};

struct OpUseOverlaySource {
  OverlaySource overlay;
  IntRect picture;
};

struct OpPaintTextureRegion {
  ThebesBufferData bufferData;
  nsIntRegion updatedRegion;
};

/**
 * Tells the CompositableHost to remove the corresponding TextureHost
 */
struct OpRemoveTexture {
  PTexture texture;
};

struct TimedTexture {
  PTexture texture;
  ReadLockDescriptor sharedLock;
  TimeStamp timeStamp;
  IntRect picture;
  uint32_t frameID;
  uint32_t producerID;
};

/**
 * Tells the compositor-side which textures to use (for example, as front buffer
 * if there are several textures for double buffering).
 * This provides a list of textures with timestamps, ordered by timestamp.
 * The newest texture whose timestamp is <= the current time is rendered
 * (where null is considered less than every other timestamp). If there is no
 * such texture, the first texture is rendered.
 * The first timestamp value can be null, but the others must not be.
 * The list must not be empty.
 */
struct OpUseTexture {
  TimedTexture[] textures;
};

struct OpUseComponentAlphaTextures {
  PTexture textureOnBlack;
  PTexture textureOnWhite;
  ReadLockDescriptor sharedLockBlack;
  ReadLockDescriptor sharedLockWhite;
};

union MaybeRegion {
  nsIntRegion;
  null_t;
};

struct OpNotifyNotUsed {
  uint64_t TextureId;
  uint64_t fwdTransactionId;
};

union CompositableOperationDetail {
  OpPaintTextureRegion;

  OpUseTiledLayerBuffer;

  OpRemoveTexture;

  OpUseTexture;
  OpUseComponentAlphaTextures;
  OpUseOverlaySource;
};

struct CompositableOperation {
  PCompositable compositable;
  CompositableOperationDetail detail;
};

// A unit of a changeset; a set of these comprise a changeset
// If adding a new edit type that requires the hit testing tree to be updated,
// set the updateHitTestingTree flag to true in RecvUpdate()
union Edit {
  OpCreatePaintedLayer;
  OpCreateContainerLayer;
  OpCreateImageLayer;
  OpCreateColorLayer;
  OpCreateCanvasLayer;
  OpCreateRefLayer;

  OpSetLayerAttributes;
  OpSetDiagnosticTypes;
  OpWindowOverlayChanged;

  OpSetRoot;
  OpInsertAfter;
  OpPrependChild;
  OpRemoveChild;
  OpRepositionChild;
  OpRaiseToTopChild;

  OpAttachCompositable;
  OpAttachAsyncCompositable;

  CompositableOperation;
};

// Operations related to destroying resources, always handled after the other
// operations for safety.
union OpDestroy {
  PTexture;
  PCompositable;
};

// Replies to operations

struct OpContentBufferSwap {
  PCompositable compositable;
  nsIntRegion frontUpdatedRegion;
};

/**
 * An ImageCompositeNotification is sent the first time a particular
 * image is composited by an ImageHost.
 */
struct ImageCompositeNotification {
  PImageContainer imageContainer;
  TimeStamp imageTimeStamp;
  TimeStamp firstCompositeTimeStamp;
  uint32_t frameID;
  uint32_t producerID;
};

// Unit of a "changeset reply".  This is a weird abstraction, probably
// only to be used for buffer swapping.
union EditReply {
  OpContentBufferSwap;
};

union AsyncParentMessageData {
  OpNotifyNotUsed;
};

} // namespace
} // namespace