Inheritance diagram for SkBaseDevice:

Classes
struct	CreateInfo

struct	TextFlags

Public Member Functions
	SkBaseDevice (const SkImageInfo &, const SkSurfaceProps &)
	Construct a new device.

SkMetaData &	getMetaData ()

const SkImageInfo &	imageInfo () const
	Return ImageInfo for this device. More...

const SkSurfaceProps &	surfaceProps () const
	Return SurfaceProps for this device.

void	getGlobalBounds (SkIRect *bounds) const
	Return the bounds of the device in the coordinate space of the root canvas. More...

SkIRect	getGlobalBounds () const

int	width () const

int	height () const

bool	isOpaque () const

bool	writePixels (const SkImageInfo &, const void *, size_t rowBytes, int x, int y)

bool	accessPixels (SkPixmap *pmap)
	Try to get write-access to the pixels behind the device. More...

bool	peekPixels (SkPixmap *)
	Try to get read-only-access to the pixels behind the device. More...

const SkIPoint &	getOrigin () const
	Return the device's origin: its offset in device coordinates from the default origin in its canvas' matrix/clip.

Public Member Functions inherited from SkRefCntBase
	SkRefCntBase ()
	Default construct, initializing the reference count to 1.

virtual	~SkRefCntBase ()
	Destruct, asserting that the reference count is 1.

int32_t	getRefCnt () const
	Return the reference count. More...

void	validate () const

bool	unique () const
	May return true if the caller is the only owner. More...

void	ref () const
	Increment the reference count. More...

void	unref () const
	Decrement the reference count. More...

Protected Types
enum	TileUsage { kPossible_TileUsage, kNever_TileUsage }

Protected Member Functions
uint32_t	filterTextFlags (const SkPaint &) const
	Returns the text-related flags, possibly modified based on the state of the device (e.g. More...

virtual bool	onShouldDisableLCD (const SkPaint &) const

virtual void	setMatrixClip (const SkMatrix &, const SkRegion &, const SkClipStack &)
	DEPRECATED: This will be removed in a future change. More...

virtual void	drawPaint (const SkDraw &, const SkPaint &paint)=0
	These are called inside the per-device-layer loop for each draw call. More...

virtual void	drawPoints (const SkDraw &, SkCanvas::PointMode mode, size_t count, const SkPoint[], const SkPaint &paint)=0

virtual void	drawRect (const SkDraw &, const SkRect &r, const SkPaint &paint)=0

virtual void	drawOval (const SkDraw &, const SkRect &oval, const SkPaint &paint)=0

virtual void	drawArc (const SkDraw &, const SkRect &oval, SkScalar startAngle, SkScalar sweepAngle, bool useCenter, const SkPaint &paint)
	By the time this is called we know that abs(sweepAngle) is in the range [0, 360). More...

virtual void	drawRRect (const SkDraw &, const SkRRect &rr, const SkPaint &paint)=0

virtual void	drawDRRect (const SkDraw &, const SkRRect &outer, const SkRRect &inner, const SkPaint &)

virtual void	drawPath (const SkDraw &, const SkPath &path, const SkPaint &paint, const SkMatrix *prePathMatrix=NULL, bool pathIsMutable=false)=0
	If pathIsMutable, then the implementation is allowed to cast path to a non-const pointer and modify it in place (as an optimization). More...

virtual void	drawBitmap (const SkDraw &, const SkBitmap &bitmap, const SkMatrix &matrix, const SkPaint &paint)=0

virtual void	drawSprite (const SkDraw &, const SkBitmap &bitmap, int x, int y, const SkPaint &paint)=0

virtual void	drawBitmapRect (const SkDraw &, const SkBitmap &, const SkRect *srcOrNull, const SkRect &dst, const SkPaint &paint, SkCanvas::SrcRectConstraint)=0
	The default impl. More...

virtual void	drawBitmapNine (const SkDraw &, const SkBitmap &, const SkIRect &center, const SkRect &dst, const SkPaint &)

virtual void	drawBitmapLattice (const SkDraw &, const SkBitmap &, const SkCanvas::Lattice &, const SkRect &dst, const SkPaint &)

virtual void	drawImage (const SkDraw &, const SkImage *, SkScalar x, SkScalar y, const SkPaint &)

virtual void	drawImageRect (const SkDraw &, const SkImage , const SkRect src, const SkRect &dst, const SkPaint &, SkCanvas::SrcRectConstraint)

virtual void	drawImageNine (const SkDraw &, const SkImage *, const SkIRect &center, const SkRect &dst, const SkPaint &)

virtual void	drawImageLattice (const SkDraw &, const SkImage *, const SkCanvas::Lattice &, const SkRect &dst, const SkPaint &)

virtual void	drawText (const SkDraw &, const void *text, size_t len, SkScalar x, SkScalar y, const SkPaint &paint)=0
	Does not handle text decoration. More...

virtual void	drawPosText (const SkDraw &, const void *text, size_t len, const SkScalar pos[], int scalarsPerPos, const SkPoint &offset, const SkPaint &paint)=0

virtual void	drawVertices (const SkDraw &, SkCanvas::VertexMode, int vertexCount, const SkPoint verts[], const SkPoint texs[], const SkColor colors[], SkXfermode *xmode, const uint16_t indices[], int indexCount, const SkPaint &paint)=0

virtual void	drawTextBlob (const SkDraw &, const SkTextBlob , SkScalar x, SkScalar y, const SkPaint &paint, SkDrawFilter drawFilter)

virtual void	drawPatch (const SkDraw &, const SkPoint cubics[12], const SkColor colors[4], const SkPoint texCoords[4], SkXfermode *xmode, const SkPaint &paint)

virtual void	drawAtlas (const SkDraw &, const SkImage *atlas, const SkRSXform[], const SkRect[], const SkColor[], int count, SkXfermode::Mode, const SkPaint &)

virtual void	drawAnnotation (const SkDraw &, const SkRect &, const char[], SkData *)

virtual void	drawDevice (const SkDraw &, SkBaseDevice *, int x, int y, const SkPaint &)=0
	The SkDevice passed will be an SkDevice which was returned by a call to onCreateDevice on this device with kNeverTile_TileExpectation.

virtual void	drawTextOnPath (const SkDraw &, const void text, size_t len, const SkPath &, const SkMatrix , const SkPaint &)

virtual void	drawTextRSXform (const SkDraw &, const void *text, size_t len, const SkRSXform[], const SkPaint &)

virtual void	drawSpecial (const SkDraw &, SkSpecialImage *, int x, int y, const SkPaint &)

virtual sk_sp< SkSpecialImage >	makeSpecial (const SkBitmap &)

virtual sk_sp< SkSpecialImage >	makeSpecial (const SkImage *)

virtual sk_sp< SkSpecialImage >	snapSpecial ()

bool	readPixels (const SkImageInfo &, void *dst, size_t rowBytes, int x, int y)

virtual GrContext *	context () const

virtual sk_sp< SkSurface >	makeSurface (const SkImageInfo &, const SkSurfaceProps &)

virtual bool	onPeekPixels (SkPixmap *)

virtual bool	onReadPixels (const SkImageInfo &, void *, size_t, int x, int y)
	The caller is responsible for "pre-clipping" the dst. More...

virtual bool	onWritePixels (const SkImageInfo &, const void *, size_t, int x, int y)
	The caller is responsible for "pre-clipping" the src. More...

virtual bool	onAccessPixels (SkPixmap *)

virtual SkBaseDevice *	onCreateDevice (const CreateInfo &, const SkPaint *)
	Create a new device based on CreateInfo. More...

Protected Member Functions inherited from SkRefCntBase
void	internal_dispose_restore_refcnt_to_1 () const
	Allow subclasses to call this if they've overridden internal_dispose so they can reset fRefCnt before the destructor is called or if they choose not to call the destructor (e.g. More...

Static Protected Member Functions
static void	LogDrawScaleFactor (const SkMatrix &, SkFilterQuality)

Private Types
typedef SkRefCnt	INHERITED

Private Member Functions
virtual void	replaceBitmapBackendForRasterSurface (const SkBitmap &)

virtual bool	forceConservativeRasterClip () const

virtual GrDrawContext *	accessDrawContext ()
	Don't call this!

void	setOrigin (int x, int y)

virtual void	flush ()
	Causes any deferred drawing to the device to be completed.

virtual SkImageFilterCache *	getImageFilterCache ()

void	privateResize (int w, int h)

Private Attributes
SkIPoint	fOrigin

SkMetaData *	fMetaData

const SkImageInfo	fInfo

const SkSurfaceProps	fSurfaceProps

Friends
class	SkCanvas

struct	DeviceCM

class	SkDraw

class	SkDrawIter

class	SkDeviceFilteredPaint

class	SkNoPixelsBitmapDevice

class	SkSurface_Raster

class	DeviceTestingAccess

class	SkBitmapDevice

Member Enumeration Documentation

enum SkBaseDevice::TileUsage

protected

Enumerator
kPossible_TileUsage	the created device may be drawn tiled
kNever_TileUsage	the created device will never be drawn tiled

Member Function Documentation

bool SkBaseDevice::accessPixels ( SkPixmap * pmap )

Try to get write-access to the pixels behind the device.

If successful, this returns true and fills-out the pixmap parameter. On success it also bumps the genID of the underlying bitmap.

On failure, returns false and ignores the pixmap parameter.

virtual void SkBaseDevice::drawArc	(	const SkDraw &	,
		const SkRect &	oval,
		SkScalar	startAngle,
		SkScalar	sweepAngle,
		bool	useCenter,
		const SkPaint &	paint
	)

protectedvirtual

By the time this is called we know that abs(sweepAngle) is in the range [0, 360).

virtual void SkBaseDevice::drawBitmapRect	(	const SkDraw &	,
		const SkBitmap &	,
		const SkRect *	srcOrNull,
		const SkRect &	dst,
		const SkPaint &	paint,
		SkCanvas::SrcRectConstraint
	)

protectedpure virtual

The default impl.

will create a bitmap-shader from the bitmap, and call drawRect with it.

Implemented in SkBitmapDevice.

virtual void SkBaseDevice::drawPaint	(	const SkDraw &	,
		const SkPaint &	paint
	)

protectedpure virtual

These are called inside the per-device-layer loop for each draw call.

When these are called, we have already applied any saveLayer operations, and are handling any looping from the paint, and any effects from the DrawFilter.

Implemented in SkBitmapDevice.

virtual void SkBaseDevice::drawPath	(	const SkDraw &	,
		const SkPath &	path,
		const SkPaint &	paint,
		const SkMatrix *	prePathMatrix = `NULL`,
		bool	pathIsMutable = `false`
	)

protectedpure virtual

If pathIsMutable, then the implementation is allowed to cast path to a non-const pointer and modify it in place (as an optimization).

Canvas may do this to implement helpers such as drawOval, by placing a temp path on the stack to hold the representation of the oval.

If prePathMatrix is not null, it should logically be applied before any stroking or other effects. If there are no effects on the paint that affect the geometry/rasterization, then the pre matrix can just be pre-concated with the current matrix.

Implemented in SkBitmapDevice.

virtual void SkBaseDevice::drawText	(	const SkDraw &	,
		const void *	text,
		size_t	len,
		SkScalar	x,
		SkScalar	y,
		const SkPaint &	paint
	)

protectedpure virtual

Does not handle text decoration.

Decorations (underline and stike-thru) will be handled by SkCanvas.

Implemented in SkBitmapDevice.

uint32_t SkBaseDevice::filterTextFlags ( const SkPaint & ) const

protected

Returns the text-related flags, possibly modified based on the state of the device (e.g.

support for LCD).

void SkBaseDevice::getGlobalBounds ( SkIRect * bounds ) const

inline

Return the bounds of the device in the coordinate space of the root canvas.

The root device will have its top-left at 0,0, but other devices such as those associated with saveLayer may have a non-zero origin.

const SkImageInfo& SkBaseDevice::imageInfo ( ) const

inline

Return ImageInfo for this device.

If the canvas is not backed by pixels (cpu or gpu), then the info's ColorType will be kUnknown_SkColorType.

virtual SkBaseDevice* SkBaseDevice::onCreateDevice	(	const CreateInfo &	,
		const SkPaint *
	)

inlineprotectedvirtual

Create a new device based on CreateInfo.

If the paint is not null, then it represents a preview of how the new device will be composed with its creator device (this).

The subclass may be handed this device in drawDevice(), so it must always return a device that it knows how to draw, and that it knows how to identify if it is not of the same subclass (since drawDevice is passed a SkBaseDevice*). If the subclass cannot fulfill that contract (e.g. PDF cannot support some settings on the paint) it should return NULL, and the caller may then decide to explicitly create a bitmapdevice, knowing that later it could not call drawDevice with it (but it could call drawSprite or drawBitmap).

Reimplemented in SkBitmapDevice.

virtual bool SkBaseDevice::onReadPixels	(	const SkImageInfo &	,
		void *	,
		size_t	,
		int	x,
		int	y
	)

protectedvirtual

The caller is responsible for "pre-clipping" the dst.

The impl can assume that the dst image at the specified x,y offset will fit within the device's bounds.

This is explicitly asserted in readPixels(), the public way to call this.

Reimplemented in SkBitmapDevice.

virtual bool SkBaseDevice::onWritePixels	(	const SkImageInfo &	,
		const void *	,
		size_t	,
		int	x,
		int	y
	)

protectedvirtual

The caller is responsible for "pre-clipping" the src.

The impl can assume that the src image at the specified x,y offset will fit within the device's bounds.

This is explicitly asserted in writePixelsDirect(), the public way to call this.

Reimplemented in SkBitmapDevice.

bool SkBaseDevice::peekPixels ( SkPixmap * )

Try to get read-only-access to the pixels behind the device.

If successful, this returns true and fills-out the pixmap parameter.

On failure, returns false and ignores the pixmap parameter.

virtual void SkBaseDevice::setMatrixClip	(	const SkMatrix &	,
		const SkRegion &	,
		const SkClipStack &
	)

inlineprotectedvirtual

DEPRECATED: This will be removed in a future change.

Device subclasses should use the matrix and clip from the SkDraw passed to draw functions.

Called with the correct matrix and clip before this device is drawn to using those settings. If your subclass overrides this, be sure to call through to the base class as well.

The clipstack is another view of the clip. It records the actual geometry that went into building the region. It is present for devices that want to parse it, but is not required: the region is a complete picture of the current clip. (i.e. if you regionize all of the geometry in the clipstack, you will arrive at an equivalent region to the one passed in).

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

include/core/SkDevice.h

Classes

Public Member Functions

Protected Types

Protected Member Functions

Static Protected Member Functions

Private Types

Private Member Functions

Private Attributes

Friends

Member Enumeration Documentation

Member Function Documentation