GrClip Class Reference

GrClip is an abstract base class for applying a clip. More...

#include <GrClip.h>

Inheritance diagram for GrClip:

Public Member Functions
virtual bool	quickContains (const SkRect &) const =0
virtual bool	quickContains (const SkRRect &rrect) const
virtual void	getConservativeBounds (int width, int height, SkIRect *devResult, bool *isIntersectionOfRects=nullptr) const =0
virtual bool	apply (GrContext *, GrDrawContext *, bool useHWAA, bool hasUserStencilSettings, GrAppliedClip *out) const =0

Static Public Member Functions
template<typename TRect >
static constexpr bool	IsInsideClip (const TRect &innerClipBounds, const SkRect &queryBounds)
	Returns true if the given query bounds count as entirely inside the clip. More...
template<typename TRect >
static constexpr bool	IsOutsideClip (const TRect &outerClipBounds, const SkRect &queryBounds)
	Returns true if the given query bounds count as entirely outside the clip. More...
static SkIRect	GetPixelIBounds (const SkRect &bounds)
	Returns the minimal integer rect that counts as containing a given set of bounds.
static SkRect	GetPixelBounds (const SkRect &bounds)
	Returns the minimal pixel-aligned rect that counts as containing a given set of bounds.
static bool	IsPixelAligned (const SkRect &rect)
	Returns true if the given rect counts as aligned with pixel boundaries.

Static Public Attributes
static constexpr SkScalar	kBoundsTolerance = 1e-3f
	This is the maximum distance that a draw may extend beyond a clip's boundary and still count count as "on the other side". More...

Detailed Description

GrClip is an abstract base class for applying a clip.

It constructs a clip mask if necessary, and fills out a GrAppliedClip instructing the caller on how to set up the draw state.

Member Function Documentation

template<typename TRect >

static constexpr bool GrClip::IsInsideClip ( const TRect &  innerClipBounds, const SkRect &  queryBounds  )

inlinestatic

Returns true if the given query bounds count as entirely inside the clip.

Parameters

innerClipBounds	device-space rect contained by the clip (SkRect or SkIRect).
queryBounds	device-space bounds of the query region.

template<typename TRect >

static constexpr bool GrClip::IsOutsideClip ( const TRect &  outerClipBounds, const SkRect &  queryBounds  )

inlinestatic

Returns true if the given query bounds count as entirely outside the clip.

Parameters

outerClipBounds	device-space rect that contains the clip (SkRect or SkIRect).
queryBounds	device-space bounds of the query region.

Member Data Documentation

constexpr SkScalar GrClip::kBoundsTolerance = 1e-3f

static

This is the maximum distance that a draw may extend beyond a clip's boundary and still count count as "on the other side".

We leave some slack because floating point rounding error is likely to blame. The rationale for 1e-3 is that in the coverage case (and barring unexpected rounding), as long as coverage stays within 0.5 * 1/256 of its intended value it shouldn't have any effect on the final pixel values.

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The documentation for this class was generated from the following file:

• include/gpu/GrClip.h