const m … type Image … type RGBA64Image … type Quantizer … type Op … const Over … const Src … // Draw implements the [Drawer] interface by calling the Draw function with this // [Op]. func (op Op) Draw(dst Image, r image.Rectangle, src image.Image, sp image.Point) { … } type Drawer … var FloydSteinberg … type floydSteinberg … func (floydSteinberg) Draw(dst Image, r image.Rectangle, src image.Image, sp image.Point) { … } // clip clips r against each image's bounds (after translating into the // destination image's coordinate space) and shifts the points sp and mp by // the same amount as the change in r.Min. func clip(dst Image, r *image.Rectangle, src image.Image, sp *image.Point, mask image.Image, mp *image.Point) { … } func processBackward(dst image.Image, r image.Rectangle, src image.Image, sp image.Point) bool { … } // Draw calls [DrawMask] with a nil mask. func Draw(dst Image, r image.Rectangle, src image.Image, sp image.Point, op Op) { … } // DrawMask aligns r.Min in dst with sp in src and mp in mask and then replaces the rectangle r // in dst with the result of a Porter-Duff composition. A nil mask is treated as opaque. func DrawMask(dst Image, r image.Rectangle, src image.Image, sp image.Point, mask image.Image, mp image.Point, op Op) { … } func drawFillOver(dst *image.RGBA, r image.Rectangle, sr, sg, sb, sa uint32) { … } func drawFillSrc(dst *image.RGBA, r image.Rectangle, sr, sg, sb, sa uint32) { … } func drawCopyOver(dst *image.RGBA, r image.Rectangle, src *image.RGBA, sp image.Point) { … } // drawCopySrc copies bytes to dstPix from srcPix. These arguments roughly // correspond to the Pix fields of the image package's concrete image.Image // implementations, but are offset (dstPix is dst.Pix[dpOffset:] not dst.Pix). func drawCopySrc( dstPix []byte, dstStride int, r image.Rectangle, srcPix []byte, srcStride int, sp image.Point, bytesPerRow int) { … } func drawNRGBAOver(dst *image.RGBA, r image.Rectangle, src *image.NRGBA, sp image.Point) { … } func drawNRGBASrc(dst *image.RGBA, r image.Rectangle, src *image.NRGBA, sp image.Point) { … } func drawGray(dst *image.RGBA, r image.Rectangle, src *image.Gray, sp image.Point) { … } func drawCMYK(dst *image.RGBA, r image.Rectangle, src *image.CMYK, sp image.Point) { … } func drawGlyphOver(dst *image.RGBA, r image.Rectangle, src *image.Uniform, mask *image.Alpha, mp image.Point) { … } func drawGrayMaskOver(dst *image.RGBA, r image.Rectangle, src *image.Gray, sp image.Point, mask *image.Alpha, mp image.Point) { … } func drawRGBAMaskOver(dst *image.RGBA, r image.Rectangle, src *image.RGBA, sp image.Point, mask *image.Alpha, mp image.Point) { … } func drawRGBA64ImageMaskOver(dst *image.RGBA, r image.Rectangle, src image.RGBA64Image, sp image.Point, mask *image.Alpha, mp image.Point) { … } func drawRGBA(dst *image.RGBA, r image.Rectangle, src image.Image, sp image.Point, mask image.Image, mp image.Point, op Op) { … } // clamp clamps i to the interval [0, 0xffff]. func clamp(i int32) int32 { … } // sqDiff returns the squared-difference of x and y, shifted by 2 so that // adding four of those won't overflow a uint32. // // x and y are both assumed to be in the range [0, 0xffff]. func sqDiff(x, y int32) uint32 { … } func drawPaletted(dst Image, r image.Rectangle, src image.Image, sp image.Point, floydSteinberg bool) { … }
Codebase Browser
go