go-tinyqr

commit

622db714a433d12b4f7ee689a9af37697d6940c2

parent

bcdd5e378222dd9f20da94a99c0101d30ebf3a50

Author

wangbei <wangbei@qiyi.com>

Date

2019-01-05 12:39

perf: improve img bitmap fill performance

Diffstat

1 files changed, 6 insertions, 5 deletions

diff --git a/qrcode.go b/qrcode.go

@@ -293,11 +293,11 @@ func (q *QRCode) Image(size int) image.Image {
  293   293 	// Saves a few bytes to have them in this order
  294   294 	p := color.Palette([]color.Color{q.BackgroundColor, q.ForegroundColor})
  295   295 	img := image.NewPaletted(rect, p)
   -1   296 	bgClr := uint8(img.Palette.Index(q.BackgroundColor))
   -1   297 	fgClr := uint8(img.Palette.Index(q.ForegroundColor))
  296   298 
  297    -1 	for i := 0; i < size; i++ {
  298    -1 		for j := 0; j < size; j++ {
  299    -1 			img.Set(i, j, q.BackgroundColor)
  300    -1 		}
   -1   299 	for i := range img.Pix {
   -1   300 		img.Pix[i] = bgClr
  301   301 	}
  302   302 
  303   303 	bitmap := q.symbol.bitmap()
@@ -308,7 +308,8 @@ func (q *QRCode) Image(size int) image.Image {
  308   308 				startY := y*pixelsPerModule + offset
  309   309 				for i := startX; i < startX+pixelsPerModule; i++ {
  310   310 					for j := startY; j < startY+pixelsPerModule; j++ {
  311    -1 						img.Set(i, j, q.ForegroundColor)
   -1   311 						pos := img.PixOffset(i, j)
   -1   312 						img.Pix[pos] = fgClr
  312   313 					}
  313   314 				}
  314   315 			}