HLine_SkAntiHairBlitter Class Reference

Inheritance diagram for HLine_SkAntiHairBlitter:

Public Member Functions
SkFixed	drawCap (int x, SkFixed fy, SkFixed slope, int mod64) override
SkFixed	drawLine (int x, int stopx, SkFixed fy, SkFixed slope) 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 125 of file SkScan_Antihair.cpp.

Member Function Documentation

drawCap()

SkFixed HLine_SkAntiHairBlitter::drawCap ( int  x, SkFixed  fy, SkFixed  slope, int  mod64  )

inlineoverridevirtual

Implements SkAntiHairBlitter.

Definition at line 127 of file SkScan_Antihair.cpp.

                                                                          {
        fy += SK_Fixed1/2;
 
        int y = fy >> 16;
        uint8_t  a = (uint8_t)((fy >> 8) & 0xFF);
 
        // lower line
        unsigned ma = SmallDot6Scale(a, mod64);
        if (ma) {
            call_hline_blitter(this->getBlitter(), x, y, 1, ma);
        }
 
        // upper line
        ma = SmallDot6Scale(255 - a, mod64);
        if (ma) {
            call_hline_blitter(this->getBlitter(), x, y - 1, 1, ma);
        }
 
        return fy - SK_Fixed1/2;
    }

drawLine()

SkFixed HLine_SkAntiHairBlitter::drawLine ( int  x, int  stopx, SkFixed  fy, SkFixed  slope  )

inlineoverridevirtual

Implements SkAntiHairBlitter.

Definition at line 148 of file SkScan_Antihair.cpp.

                                                                           {
        SkASSERT(x < stopx);
        int count = stopx - x;
        fy += SK_Fixed1/2;
 
        int y = fy >> 16;
        uint8_t  a = (uint8_t)((fy >> 8) & 0xFF);
 
        // lower line
        if (a) {
            call_hline_blitter(this->getBlitter(), x, y, count, a);
        }
 
        // upper line
        a = 255 - a;
        if (a) {
            call_hline_blitter(this->getBlitter(), x, y - 1, count, a);
        }
 
        return fy - SK_Fixed1/2;
    }

---

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

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