FakeBlitter Struct Reference

Inheritance diagram for FakeBlitter:

Public Member Functions
	FakeBlitter ()
void	blitH (int x, int y, int width) override
	Blit a horizontal run of one or more pixels.
void	blitAntiH (int x, int y, const SkAlpha antialias[], const int16_t runs[]) override
Public Member Functions inherited from SkBlitter
virtual	~SkBlitter ()
virtual void	blitV (int x, int y, int height, SkAlpha alpha)
	Blit a vertical run of pixels with a constant alpha value.
virtual void	blitRect (int x, int y, int width, int height)
	Blit a solid rectangle one or more pixels wide.
virtual void	blitAntiRect (int x, int y, int width, int height, SkAlpha leftAlpha, SkAlpha rightAlpha)
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)

Public Attributes
int	m_blitCount

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 20 of file FillPathTest.cpp.

Constructor & Destructor Documentation

FakeBlitter()

FakeBlitter::FakeBlitter ( )

inline

Definition at line 21 of file FillPathTest.cpp.

        : m_blitCount(0) { }

Member Function Documentation

blitAntiH()

void FakeBlitter::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 28 of file FillPathTest.cpp.

                                                                                           {
      SkDEBUGFAIL("blitAntiH not implemented");
    }

blitH()

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

inlineoverridevirtual

Blit a horizontal run of one or more pixels.

Implements SkBlitter.

Definition at line 24 of file FillPathTest.cpp.

                                                 {
        m_blitCount++;
    }

Member Data Documentation

m_blitCount

int FakeBlitter::m_blitCount

Definition at line 32 of file FillPathTest.cpp.

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

• third_party/skia/tests/FillPathTest.cpp