Esempio n. 1
0
File: pxl.go Progetto: hawx/img
func doPxl(img image.Image, size utils.Dimension, triangle Triangle, style Style, aliased bool) image.Image {

	nCPU := runtime.NumCPU()
	runtime.GOMAXPROCS(nCPU)

	var o draw.Image
	b := img.Bounds()
	c := make(chan int, nCPU)
	i := 0 // number of workers created. there may be a better way...

	switch style {
	case CROPPED:
		cols := b.Dx() / size.W
		rows := b.Dy() / size.H

		o = image.NewRGBA(image.Rect(0, 0, size.W*cols, size.H*rows))

		for j, r := range utils.ChopRectangleToSizes(b, size.H, size.W, utils.IGNORE) {
			go pxlWorker(img, r, o, size, triangle, aliased, c)
			i = j
		}

	case FITTED:
		o = image.NewRGBA(img.Bounds())

		for j, r := range utils.ChopRectangleToSizes(img.Bounds(), size.H, size.W, utils.SEPARATE) {
			go pxlWorker(img, r, o, size, triangle, aliased, c)
			i = j
		}
	}

	for j := 0; j < i; j++ {
		<-c
	}

	return o
}
Esempio n. 2
0
File: pixelate.go Progetto: hawx/img
// Pixelate takes an Image and pixelates it into rectangles with the dimensions
// given. The colour values in each region are averaged to produce the resulting
// colours.
func Pixelate(img image.Image, size utils.Dimension, style Style) image.Image {
	nCPU := runtime.NumCPU()
	runtime.GOMAXPROCS(nCPU)

	var o draw.Image
	b := img.Bounds()
	c := make(chan int, nCPU)
	i := 0 // like pxl. this may not be the best way

	switch style {
	case CROPPED:
		cols := b.Dx() / size.W
		rows := b.Dy() / size.H

		o = image.NewRGBA(image.Rect(0, 0, size.W*cols, size.H*rows))

		for j, r := range utils.ChopRectangleToSizes(b, size.H, size.W, utils.IGNORE) {
			go paintAverage(img, r, o, c)
			i = j
		}

	case FITTED:
		o = image.NewRGBA(b)

		for j, r := range utils.ChopRectangleToSizes(b, size.H, size.W, utils.SEPARATE) {
			go paintAverage(img, r, o, c)
			i = j
		}
	}

	for j := 0; j < i; j++ {
		<-c
	}

	return o
}