Inheritance diagram for AdditiveBlitter:

Public Member Functions
	~AdditiveBlitter () override

virtual SkBlitter *	getRealBlitter (bool forceRealBlitter=false)=0

virtual void	blitAntiH (int x, int y, const SkAlpha antialias[], int len)=0

virtual void	blitAntiH (int x, int y, const SkAlpha alpha)=0

virtual void	blitAntiH (int x, int y, int width, const SkAlpha alpha)=0

void	blitAntiH (int x, int y, const SkAlpha antialias[], const int16_t runs[]) override

void	blitV (int x, int y, int height, SkAlpha alpha) override
	Blit a vertical run of pixels with a constant alpha value.

void	blitH (int x, int y, int width) override
	Blit a horizontal run of one or more pixels.

void	blitRect (int x, int y, int width, int height) override
	Blit a solid rectangle one or more pixels wide.

void	blitAntiRect (int x, int y, int width, int height, SkAlpha leftAlpha, SkAlpha rightAlpha) override

virtual int	getWidth ()=0

virtual void	flush_if_y_changed (SkFixed y, SkFixed nextY)=0

Public Member Functions inherited from SkBlitter
virtual	~SkBlitter ()

void	blitFatAntiRect (const SkRect &rect)

virtual void	blitMask (const SkMask &, const SkIRect &clip)

virtual void	blitAntiH2 (int x, int y, U8CPU a0, U8CPU a1)

virtual void	blitAntiV2 (int x, int y, U8CPU a0, U8CPU a1)

virtual bool	isNullBlitter () const

virtual int	requestRowsPreserved () const

virtual void *	allocBlitMemory (size_t sz)

void	blitRectRegion (const SkIRect &rect, const SkRegion &clip)

void	blitRegion (const SkRegion &clip)

Additional Inherited Members
Static Public Member Functions inherited from SkBlitter
static bool	UseLegacyBlitter (const SkPixmap &, const SkPaint &, const SkMatrix &)

static SkBlitter *	Choose (const SkPixmap &dst, const SkMatrix &ctm, const SkPaint &paint, SkArenaAlloc *, bool drawCoverage, sk_sp< SkShader > clipShader, const SkSurfaceProps &props)

static SkBlitter *	ChooseSprite (const SkPixmap &dst, const SkPaint &, const SkPixmap &src, int left, int top, SkArenaAlloc *, sk_sp< SkShader > clipShader)

Protected Attributes inherited from SkBlitter
SkAutoMalloc	fBlitMemory

Detailed Description

Definition at line 99 of file SkScan_AAAPath.cpp.

Constructor & Destructor Documentation

◆ ~AdditiveBlitter()

AdditiveBlitter::~AdditiveBlitter ( )

inlineoverride

Definition at line 101 of file SkScan_AAAPath.cpp.

101{}

Member Function Documentation

◆ blitAntiH() [1/4]

virtual void AdditiveBlitter::blitAntiH	(	int	x,
		int	y,
		const SkAlpha	alpha
	)

pure virtual

Implemented in MaskAdditiveBlitter, RunBasedAdditiveBlitter, and SafeRLEAdditiveBlitter.

◆ blitAntiH() [2/4]

void AdditiveBlitter::blitAntiH	(	int	x,
		int	y,
		const SkAlpha	antialias[],
		const int16_t	runs[]
	)

inlineoverridevirtual

Blit a horizontal run of antialiased pixels; runs[] is a sparse zero-terminated run-length encoding of spans of constant alpha values. The runs[] and antialias[] work together to represent long runs of pixels with the same alphas. The runs[] contains the number of pixels with the same alpha, and antialias[] contain the coverage value for that number of pixels. The runs[] (and antialias[]) are encoded in a clever way. The runs array is zero terminated, and has enough entries for each pixel plus one, in most cases some of the entries will not contain valid data. An entry in the runs array contains the number of pixels (np) that have the same alpha value. The next np value is found np entries away. For example, if runs[0] = 7, then the next valid entry will by at runs[7]. The runs array and antialias[] are coupled by index. So, if the np entry is at runs[45] = 12 then the alpha value can be found at antialias[45] = 0x88. This would mean to use an alpha value of 0x88 for the next 12 pixels starting at pixel 45.

Implements SkBlitter.

Definition at line 109 of file SkScan_AAAPath.cpp.

                                                                                           {
        SkDEBUGFAIL("Please call real blitter's blitAntiH instead.");
    }

◆ blitAntiH() [3/4]

virtual void AdditiveBlitter::blitAntiH	(	int	x,
		int	y,
		const SkAlpha	antialias[],
		int	len
	)

pure virtual

Implemented in MaskAdditiveBlitter, RunBasedAdditiveBlitter, and SafeRLEAdditiveBlitter.

◆ blitAntiH() [4/4]

virtual void AdditiveBlitter::blitAntiH	(	int	x,
		int	y,
		int	width,
		const SkAlpha	alpha
	)

pure virtual

Implemented in MaskAdditiveBlitter, RunBasedAdditiveBlitter, and SafeRLEAdditiveBlitter.

◆ blitAntiRect()

void AdditiveBlitter::blitAntiRect	(	int	x,
		int	y,
		int	width,
		int	height,
		SkAlpha	leftAlpha,
		SkAlpha	rightAlpha
	)

inlineoverridevirtual

Blit a rectangle with one alpha-blended column on the left, width (zero or more) opaque pixels, and one alpha-blended column on the right. The result will always be at least two pixels wide.

Default implementation doesn't check for easy optimizations such as alpha == 255; also uses blitV(), which some subclasses may not support.

Reimplemented from SkBlitter.

Reimplemented in MaskAdditiveBlitter.

Definition at line 125 of file SkScan_AAAPath.cpp.

                     {
        SkDEBUGFAIL("Please call real blitter's blitAntiRect instead.");
    }

◆ blitH()

void AdditiveBlitter::blitH	(	int	x,
		int	y,
		int	width
	)

inlineoverridevirtual

Blit a horizontal run of one or more pixels.

Implements SkBlitter.

Definition at line 117 of file SkScan_AAAPath.cpp.

                                                 {
        SkDEBUGFAIL("Please call real blitter's blitH instead.");
    }

◆ blitRect()

void AdditiveBlitter::blitRect	(	int	x,
		int	y,
		int	width,
		int	height
	)

inlineoverridevirtual

Blit a solid rectangle one or more pixels wide.

Reimplemented from SkBlitter.

Reimplemented in MaskAdditiveBlitter.

Definition at line 121 of file SkScan_AAAPath.cpp.

                                                                {
        SkDEBUGFAIL("Please call real blitter's blitRect instead.");
    }

◆ blitV()

void AdditiveBlitter::blitV	(	int	x,
		int	y,
		int	height,
		SkAlpha	alpha
	)

inlineoverridevirtual

Blit a vertical run of pixels with a constant alpha value.

Reimplemented from SkBlitter.

Reimplemented in MaskAdditiveBlitter.

Definition at line 113 of file SkScan_AAAPath.cpp.

                                                                 {
        SkDEBUGFAIL("Please call real blitter's blitV instead.");
    }

◆ flush_if_y_changed()

virtual void AdditiveBlitter::flush_if_y_changed	(	SkFixed	y,
		SkFixed	nextY
	)

pure virtual

Implemented in MaskAdditiveBlitter, and RunBasedAdditiveBlitter.

◆ getRealBlitter()

virtual SkBlitter * AdditiveBlitter::getRealBlitter ( bool forceRealBlitter = false )

pure virtual

Implemented in MaskAdditiveBlitter, and RunBasedAdditiveBlitter.

◆ getWidth()

virtual int AdditiveBlitter::getWidth ( )

pure virtual

Implemented in MaskAdditiveBlitter, and RunBasedAdditiveBlitter.

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

third_party/skia/src/core/SkScan_AAAPath.cpp

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ ~AdditiveBlitter()

Member Function Documentation

◆ blitAntiH() [1/4]

◆ blitAntiH() [2/4]

◆ blitAntiH() [3/4]

◆ blitAntiH() [4/4]

◆ blitAntiRect()

◆ blitH()

◆ blitRect()

◆ blitV()

◆ flush_if_y_changed()

◆ getRealBlitter()

◆ getWidth()