skgpu::ganesh::StencilClip Class Reference

#include <StencilClip.h>

Inheritance diagram for skgpu::ganesh::StencilClip:

Public Member Functions
	StencilClip (const SkISize &rtDims, uint32_t stencilStackID=SK_InvalidGenID)
	StencilClip (const SkISize &rtDims, const SkIRect &scissorRect, uint32_t stencilStackID=SK_InvalidGenID)
const GrFixedClip &	fixedClip () const
GrFixedClip &	fixedClip ()
uint32_t	stencilStackID () const
bool	hasStencilClip () const
void	setStencilClip (uint32_t stencilStackID)
SkIRect	getConservativeBounds () const final
Effect	apply (GrAppliedHardClip *out, SkIRect *bounds) const final
PreClipResult	preApply (const SkRect &drawBounds, GrAA aa) const final
Public Member Functions inherited from GrClip
virtual	~GrClip ()

Additional Inherited Members
Public Types inherited from GrClip
enum class	Effect { kClipped , kUnclipped , kClippedOut }
enum class	BoundsType { kExterior , kInterior }
Static Public Member Functions inherited from GrClip
static bool	IsInsideClip (const SkIRect &innerClipBounds, const SkRect &drawBounds, GrAA aa)
static bool	IsOutsideClip (const SkIRect &outerClipBounds, const SkRect &drawBounds, GrAA aa)
static SkIRect	GetPixelIBounds (const SkRect &bounds, GrAA aa, BoundsType mode=BoundsType::kExterior)
static bool	IsPixelAligned (const SkRect &rect)
Static Public Attributes inherited from GrClip
static constexpr SkScalar	kBoundsTolerance = 1e-3f
static constexpr SkScalar	kHalfPixelRoundingTolerance = 5e-2f

Detailed Description

Implements GrHardClip with the currently-existing stencil buffer contents and GrFixedClip.

Definition at line 19 of file StencilClip.h.

Constructor & Destructor Documentation

StencilClip() [1/2]

skgpu::ganesh::StencilClip::StencilClip ( const SkISize &  rtDims, uint32_t  stencilStackID = SK_InvalidGenID  )

inlineexplicit

Definition at line 21 of file StencilClip.h.

            : fFixedClip(rtDims)
            , fStencilStackID(stencilStackID) {}

StencilClip() [2/2]

skgpu::ganesh::StencilClip::StencilClip ( const SkISize &  rtDims, const SkIRect &  scissorRect, uint32_t  stencilStackID = SK_InvalidGenID  )

inline

Definition at line 25 of file StencilClip.h.

            : fFixedClip(rtDims, scissorRect)
            , fStencilStackID(stencilStackID) {}

Member Function Documentation

apply()

Effect skgpu::ganesh::StencilClip::apply ( GrAppliedHardClip *  out, SkIRect *  bounds  ) const

inlinefinalvirtual

Sets the appropriate hardware state modifications on GrAppliedHardClip that will implement the clip. On input 'bounds' is a conservative bounds of the draw that is to be clipped. After return 'bounds' has been intersected with a conservative bounds of the clip.

Implements GrHardClip.

Definition at line 42 of file StencilClip.h.

                                                                      {
        Effect effect = fFixedClip.apply(out, bounds);
        if (effect == Effect::kClippedOut) {
            // Stencil won't bring back coverage
            return Effect::kClippedOut;
        }
        if (this->hasStencilClip()) {
            out->addStencilClip(fStencilStackID);
            effect = Effect::kClipped;
        }
        return effect;
    }

fixedClip() [1/2]

GrFixedClip & skgpu::ganesh::StencilClip::fixedClip ( )

inline

Definition at line 32 of file StencilClip.h.

{ return fFixedClip; }

fixedClip() [2/2]

const GrFixedClip & skgpu::ganesh::StencilClip::fixedClip ( ) const

inline

Definition at line 31 of file StencilClip.h.

{ return fFixedClip; }

getConservativeBounds()

SkIRect skgpu::ganesh::StencilClip::getConservativeBounds ( ) const

inlinefinalvirtual

Compute a conservative pixel bounds restricted to the given render target dimensions. The returned bounds represent the limits of pixels that can be drawn; anything outside of the bounds will be entirely clipped out.

Implements GrClip.

Definition at line 38 of file StencilClip.h.

                                                {
        return fFixedClip.getConservativeBounds();
    }

hasStencilClip()

bool skgpu::ganesh::StencilClip::hasStencilClip ( ) const

inline

Definition at line 35 of file StencilClip.h.

{ return SK_InvalidGenID != fStencilStackID; }

preApply()

PreClipResult skgpu::ganesh::StencilClip::preApply ( const SkRect &  drawBounds, GrAA  aa  ) const

inlinefinalvirtual

Perform preliminary, conservative analysis on the draw bounds as if it were provided to apply(). The results of this are returned the PreClipResults struct, where 'result.fEffect' corresponds to what 'apply' would return. If this value is kUnclipped or kNoDraw, then it can be assumed that apply() would also always result in the same Effect.

If kClipped is returned, apply() may further refine the effect to kUnclipped or kNoDraw, with one exception. When 'result.fIsRRect' is true, preApply() reports the single round rect and anti-aliased state that would act as an intersection on the draw geometry. If no further action is taken to modify the draw, apply() will represent this round rect in the applied clip.

When set, 'result.fRRect' will intersect with the render target bounds but may extend beyond it. If the render target bounds are the only clip effect on the draw, this is reported as kUnclipped and not as a degenerate rrect that matches the bounds.

Reimplemented from GrClip.

Definition at line 55 of file StencilClip.h.

                                                                          {
        if (this->hasStencilClip()) {
            return this->INHERITED::preApply(drawBounds, aa);
        } else {
            return fFixedClip.preApply(drawBounds, aa);
        }
    }

setStencilClip()

void skgpu::ganesh::StencilClip::setStencilClip ( uint32_t  stencilStackID )

inline

Definition at line 36 of file StencilClip.h.

{ fStencilStackID = stencilStackID; }

stencilStackID()

uint32_t skgpu::ganesh::StencilClip::stencilStackID ( ) const

inline

Definition at line 34 of file StencilClip.h.

{ return fStencilStackID; }

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

• third_party/skia/src/gpu/ganesh/StencilClip.h