VLine_SkAntiHairBlitter Class Reference

Inheritance diagram for VLine_SkAntiHairBlitter:

Public Member Functions
SkFixed	drawCap (int y, SkFixed fx, SkFixed dx, int mod64) override
SkFixed	drawLine (int y, int stopy, SkFixed fx, SkFixed dx) override
Public Member Functions inherited from SkAntiHairBlitter
	SkAntiHairBlitter ()
virtual	~SkAntiHairBlitter ()
SkBlitter *	getBlitter () const
void	setup (SkBlitter *blitter)
virtual SkFixed	drawCap (int x, SkFixed fy, SkFixed slope, int mod64)=0
virtual SkFixed	drawLine (int x, int stopx, SkFixed fy, SkFixed slope)=0

Detailed Description

Definition at line 201 of file SkScan_Antihair.cpp.

Member Function Documentation

drawCap()

SkFixed VLine_SkAntiHairBlitter::drawCap ( int  y, SkFixed  fx, SkFixed  dx, int  mod64  )

inlineoverridevirtual

Implements SkAntiHairBlitter.

Definition at line 203 of file SkScan_Antihair.cpp.

                                                                       {
        SkASSERT(0 == dx);
        fx += SK_Fixed1/2;
 
        int x = fx >> 16;
        int a = (uint8_t)((fx >> 8) & 0xFF);
 
        unsigned ma = SmallDot6Scale(a, mod64);
        if (ma) {
            this->getBlitter()->blitV(x, y, 1, ma);
        }
        ma = SmallDot6Scale(255 - a, mod64);
        if (ma) {
            this->getBlitter()->blitV(x - 1, y, 1, ma);
        }
 
        return fx - SK_Fixed1/2;
    }

drawLine()

SkFixed VLine_SkAntiHairBlitter::drawLine ( int  y, int  stopy, SkFixed  fx, SkFixed  dx  )

inlineoverridevirtual

Implements SkAntiHairBlitter.

Definition at line 222 of file SkScan_Antihair.cpp.

                                                                        {
        SkASSERT(y < stopy);
        SkASSERT(0 == dx);
        fx += SK_Fixed1/2;
 
        int x = fx >> 16;
        int a = (uint8_t)((fx >> 8) & 0xFF);
 
        if (a) {
            this->getBlitter()->blitV(x, y, stopy - y, a);
        }
        a = 255 - a;
        if (a) {
            this->getBlitter()->blitV(x - 1, y, stopy - y, a);
        }
 
        return fx - SK_Fixed1/2;
    }

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

• third_party/skia/src/core/SkScan_Antihair.cpp