示例#1
0
func traverseTiles(Style style, Area area) (image.Image, error) {
	m := image.NewRGBA(image.Rect(-Margins, -Margins, Area.TileRange.Dx()*TileSize+Margins, Area.TileRange.Dy()*TileSize+Margins))

	whiteColor := color.RGBA{255, 255, 255, 255}
	draw.Draw(m, m.Bounds(), &image.Uniform{whiteColor}, image.ZP, draw.Src)

	frameColor := color.RGBA{50, 50, 50, 255}
	draw.Draw(m, image.Rect(-Frame, -Frame, Area.TileRange.Dx()*TileSize+Frame, Area.TileRange.Dy()*TileSize+Frame), &image.Uniform{frameColor}, image.ZP, draw.Src)

	position := image.Rectangle{image.ZP, image.Point{X: TileSize, Y: TileSize}}
	for y := Area.TileRange.Min.Y; y < Area.TileRange.Max.Y; y++ {
		for x := Area.TileRange.Min.X; x < Area.TileRange.Max.X; x++ {
			img, err := readTile(Style.Mapid, Area.Z, uint(x), uint(y))
			if err != nil {
				fmt.Printf("no luck reading this tile: z:%v, %vx %v \n", Area.Z, x, y)
				fmt.Println(err)
				break
			}
			fmt.Printf("...adding %vx%v \n", x, y)
			draw.Draw(m, position, img, image.ZP, draw.Src)
			position = position.Add(image.Point{X: TileSize, Y: 0})
		}
		position = image.Rectangle{image.Point{X: 0, Y: (y - Area.TileRange.Min.Y + 1) * TileSize}, image.Point{X: TileSize, Y: (y - Area.TileRange.Min.Y + 2) * TileSize}}
	}
	fmt.Println("Great success!")
	return m, nil
}
示例#2
0
文件: nycbcra.go 项目: 2722/lantern
// SubImage returns an image representing the portion of the image p visible
// through r. The returned value shares pixels with the original image.
func (p *Image) SubImage(r image.Rectangle) image.Image {
	// TODO: share code with image.NewYCbCr when this type moves into the
	// standard image package.
	r = r.Intersect(p.Rect)
	// If r1 and r2 are Rectangles, r1.Intersect(r2) is not guaranteed to be inside
	// either r1 or r2 if the intersection is empty. Without explicitly checking for
	// this, the Pix[i:] expression below can panic.
	if r.Empty() {
		return &Image{
			YCbCr: image.YCbCr{
				SubsampleRatio: p.SubsampleRatio,
			},
		}
	}
	yi := p.YOffset(r.Min.X, r.Min.Y)
	ci := p.COffset(r.Min.X, r.Min.Y)
	ai := p.AOffset(r.Min.X, r.Min.Y)
	return &Image{
		YCbCr: image.YCbCr{
			Y:              p.Y[yi:],
			Cb:             p.Cb[ci:],
			Cr:             p.Cr[ci:],
			SubsampleRatio: p.SubsampleRatio,
			YStride:        p.YStride,
			CStride:        p.CStride,
			Rect:           r,
		},
		A:       p.A[ai:],
		AStride: p.AStride,
	}
}
示例#3
0
文件: nycbcra.go 项目: 2722/lantern
// New returns a new Image with the given bounds and subsample ratio.
func New(r image.Rectangle, subsampleRatio image.YCbCrSubsampleRatio) *Image {
	// TODO: share code with image.NewYCbCr when this type moves into the
	// standard image package.
	w, h, cw, ch := r.Dx(), r.Dy(), 0, 0
	switch subsampleRatio {
	case image.YCbCrSubsampleRatio422:
		cw = (r.Max.X+1)/2 - r.Min.X/2
		ch = h
	case image.YCbCrSubsampleRatio420:
		cw = (r.Max.X+1)/2 - r.Min.X/2
		ch = (r.Max.Y+1)/2 - r.Min.Y/2
	case image.YCbCrSubsampleRatio440:
		cw = w
		ch = (r.Max.Y+1)/2 - r.Min.Y/2
	default:
		// Default to 4:4:4 subsampling.
		cw = w
		ch = h
	}
	b := make([]byte, 2*w*h+2*cw*ch)
	// TODO: use s[i:j:k] notation to set the cap.
	return &Image{
		YCbCr: image.YCbCr{
			Y:              b[:w*h],
			Cb:             b[w*h+0*cw*ch : w*h+1*cw*ch],
			Cr:             b[w*h+1*cw*ch : w*h+2*cw*ch],
			SubsampleRatio: subsampleRatio,
			YStride:        w,
			CStride:        cw,
			Rect:           r,
		},
		A:       b[w*h+2*cw*ch:],
		AStride: w,
	}
}
示例#4
0
func (opts *DecodeOpts) wantRescale(b image.Rectangle, swapDimensions bool) bool {
	if opts == nil {
		return false
	}

	// In rescale Scale* trumps Max* so we assume the same relationship here.

	// Floating point compares probably only allow this to work if the values
	// were specified as the literal 1 or 1.0, computed values will likely be
	// off.  If Scale{Width,Height} end up being 1.0-epsilon we'll rescale
	// when it probably wouldn't even be noticible but that's okay.
	if opts.ScaleWidth == 1.0 && opts.ScaleHeight == 1.0 {
		return false
	}
	if opts.ScaleWidth > 0 && opts.ScaleWidth < 1.0 ||
		opts.ScaleHeight > 0 && opts.ScaleHeight < 1.0 {
		return true
	}

	w, h := b.Dx(), b.Dy()
	if swapDimensions {
		w, h = h, w
	}

	// Same size, don't rescale.
	if opts.MaxWidth == w && opts.MaxHeight == h {
		return false
	}
	return opts.MaxWidth > 0 && opts.MaxWidth < w ||
		opts.MaxHeight > 0 && opts.MaxHeight < h
}
示例#5
0
// Trimmed ...
func (t *Tree) Trimmed() *Tree {
	var leafs []image.Rectangle
	t.Visit(func(other *Tree) {
		if len(other.points) == 0 {
			return
		}
		leafs = append(leafs, image.Rectangle{
			Min: other.Extents.Min,
			Max: other.Extents.Max,
		})
	})

	var r *image.Rectangle
	for _, b := range leafs {
		if r == nil {
			r = new(image.Rectangle)
			*r = b
			continue
		}
		*r = r.Union(b)
	}

	tr := New(*r, t.capacity)

	t.Visit(func(other *Tree) {
		for p := range other.points {
			tr.Insert(p)
		}
	})

	return tr
}
示例#6
0
// Thumbnail scales and crops src so it fits in dst.
func Thumbnail(dst draw.Image, src image.Image) error {
	// Scale down src in the dimension that is closer to dst.
	sb := src.Bounds()
	db := dst.Bounds()
	rx := float64(sb.Dx()) / float64(db.Dx())
	ry := float64(sb.Dy()) / float64(db.Dy())
	var b image.Rectangle
	if rx < ry {
		b = image.Rect(0, 0, db.Dx(), int(float64(sb.Dy())/rx))
	} else {
		b = image.Rect(0, 0, int(float64(sb.Dx())/ry), db.Dy())
	}

	buf := image.NewRGBA(b)
	if err := Scale(buf, src); err != nil {
		return err
	}

	// Crop.
	// TODO(crawshaw): improve on center-alignment.
	var pt image.Point
	if rx < ry {
		pt.Y = (b.Dy() - db.Dy()) / 2
	} else {
		pt.X = (b.Dx() - db.Dx()) / 2
	}
	draw.Draw(dst, db, buf, pt, draw.Src)
	return nil
}
示例#7
0
// PackHorzontal finds the Pos for a horizontally packed sprite
func (l *Sprite) PackHorizontal(pos int) Pos {
	if pos == -1 || pos == 0 {
		return Pos{0, 0}
	}
	var x, y int
	var rect image.Rectangle
	l.optsMu.RLock()
	padding := l.opts.Padding
	l.optsMu.RUnlock()

	// there are n-1 paddings in an image list
	x = padding * pos
	// No padding on the outside of the image
	numimages := l.Len()
	if pos == numimages {
		x -= padding
	}
	for i := 1; i <= pos; i++ {
		l.goImagesMu.RLock()
		rect = l.imgs[i-1].Bounds()
		l.goImagesMu.RUnlock()
		x += rect.Dx()
		if pos == numimages {
			y = int(math.Max(float64(y), float64(rect.Dy())))
		}
	}

	return Pos{
		x, y,
	}
}
示例#8
0
文件: resize_test.go 项目: donlzx/rez
func checkPsnrs(t *testing.T, ref, img image.Image, sub image.Rectangle, min []float64) {
	var a, b image.Image
	a, b = ref, img
	if !sub.Empty() {
		switch a.(type) {
		case *image.RGBA:
			a = a.(*image.RGBA).SubImage(sub)
			b = b.(*image.RGBA).SubImage(sub)
		case *image.NRGBA:
			a = a.(*image.NRGBA).SubImage(sub)
			b = b.(*image.NRGBA).SubImage(sub)
		case *image.YCbCr:
			a = a.(*image.YCbCr).SubImage(sub)
			b = b.(*image.YCbCr).SubImage(sub)
		case *image.Gray:
			a = a.(*image.Gray).SubImage(sub)
			b = b.(*image.Gray).SubImage(sub)
		}
	}
	psnrs, err := Psnr(a, b)
	expect(t, err, nil)
	for i, v := range psnrs {
		if v < min[i] {
			t.Fatalf("invalid psnr %v < %v\n", v, min[i])
		}
	}
}
示例#9
0
文件: rgb.go 项目: runningwild/argus
func Make(r image.Rectangle) *Image {
	return &Image{
		Pix:    make([]byte, r.Dx()*r.Dy()*3),
		Stride: r.Dx() * 3,
		Rect:   image.Rect(0, 0, r.Dx(), r.Dy()),
	}
}
示例#10
0
文件: area_unix.go 项目: sjn1978/ui
func (a *area) Repaint(r image.Rectangle) {
	r = image.Rect(0, 0, a.width, a.height).Intersect(r)
	if r.Empty() {
		return
	}
	C.gtk_widget_queue_draw_area(a.widget, C.gint(r.Min.X), C.gint(r.Min.Y), C.gint(r.Dx()), C.gint(r.Dy()))
}
示例#11
0
文件: resize.go 项目: eliquious/gift
func (p *resizeToFitFilter) Bounds(srcBounds image.Rectangle) image.Rectangle {
	w, h := p.width, p.height
	srcw, srch := srcBounds.Dx(), srcBounds.Dy()

	if w <= 0 || h <= 0 || srcw <= 0 || srch <= 0 {
		return image.Rect(0, 0, 0, 0)
	}

	if srcw <= w && srch <= h {
		return image.Rect(0, 0, srcw, srch)
	}

	wratio := float64(srcw) / float64(w)
	hratio := float64(srch) / float64(h)

	var dstw, dsth int
	if wratio > hratio {
		dstw = w
		dsth = minint(int(float64(srch)/wratio+0.5), h)
	} else {
		dsth = h
		dstw = minint(int(float64(srcw)/hratio+0.5), w)
	}

	return image.Rect(0, 0, dstw, dsth)
}
示例#12
0
func imfilter(filter [][]float32, rect image.Rectangle, rgbFunc func(xpos, ypos int) (r0, g0, b0, a0 uint8), mergFunc func(a, b float32) float32) *image.RGBA {
	wg := sync.WaitGroup{}
	size := rect.Size()
	imgGrey := image.NewRGBA(rect)
	fX := len(filter)
	fY := len(filter[0])
	xoffset := fX / 2
	yoffset := fY / 2
	threadCount := (fX + fY) / 2
	sizeoffset := (size.X - fX) / threadCount

	timeStart := time.Now()

	wg.Add(threadCount)
	for i := 0; i < threadCount; i++ {
		go func(i int) {
			for x := xoffset + i*sizeoffset; x < xoffset+(i+1)*sizeoffset; x++ {
				for y := yoffset; y < size.Y-yoffset; y++ {
					newColor := imfilterMerg(filter, fX, fY, x, y, xoffset, yoffset, rgbFunc, mergFunc)
					imgGrey.SetRGBA(x, y, newColor)
				}
			}
			wg.Done()
		}(i)
	}
	wg.Wait()
	fmt.Println("Filt Time", time.Now().Sub(timeStart))
	return imgGrey
}
示例#13
0
func NewPicture(bounds image.Rectangle) *Picture {
	return &Picture{
		Data:  make([]float64, bounds.Dx()*bounds.Dy()),
		Gamma: 1.0, //2.2,
		Rect:  bounds,
	}
}
示例#14
0
func (v *platformView) drawScene(r image.Rectangle) {
	//log.Printf("platformView.drawScene %v\n", r)
	x, y, w, h := r.Min.X, r.Min.Y, r.Size().X, r.Size().Y
	v.area.QueueDrawArea(v.parent.ScaleCoord(x, false), v.parent.ScaleCoord(y, false),
		v.parent.ScaleCoord(w, true)+1, v.parent.ScaleCoord(h, true)+1)
	return
}
示例#15
0
// NewYCbCrAligned Allocates YCbCr image with padding.
// Because LibJPEG needs extra padding to decoding buffer, This func add an
// extra alignSize (16) padding to cover overflow from any such modes.
func NewYCbCrAligned(r image.Rectangle, subsampleRatio image.YCbCrSubsampleRatio) *image.YCbCr {
	w, h, cw, ch := r.Dx(), r.Dy(), 0, 0
	switch subsampleRatio {
	case image.YCbCrSubsampleRatio422:
		cw = (r.Max.X+1)/2 - r.Min.X/2
		ch = h
	case image.YCbCrSubsampleRatio420:
		cw = (r.Max.X+1)/2 - r.Min.X/2
		ch = (r.Max.Y+1)/2 - r.Min.Y/2
	case image.YCbCrSubsampleRatio440:
		cw = w
		ch = (r.Max.Y+1)/2 - r.Min.Y/2
	default:
		cw = w
		ch = h
	}

	// TODO: check the padding size to minimize memory allocation.
	yStride := pad(w, alignSize) + alignSize
	cStride := pad(cw, alignSize) + alignSize
	yHeight := pad(h, alignSize) + alignSize
	cHeight := pad(ch, alignSize) + alignSize

	b := make([]byte, yStride*yHeight+2*cStride*cHeight)
	return &image.YCbCr{
		Y:              b[:yStride*yHeight],
		Cb:             b[yStride*yHeight+0*cStride*cHeight : yStride*yHeight+1*cStride*cHeight],
		Cr:             b[yStride*yHeight+1*cStride*cHeight : yStride*yHeight+2*cStride*cHeight],
		SubsampleRatio: subsampleRatio,
		YStride:        yStride,
		CStride:        cStride,
		Rect:           r,
	}
}
示例#16
0
// New allocates and initializes a new DockApp.  NewDockApp does not initialize
// the window contents and does not map the window to the display screen.  The
// window is mapped to the screen when the Main method is called on the
// returned DockApp.
func New(x *xgbutil.XUtil, rect image.Rectangle) (*DockApp, error) {
	win, err := xwindow.Generate(x)
	if err != nil {
		log.Fatalf("generate window: %v", err)
	}
	win.Create(x.RootWin(), 0, 0, rect.Size().X, rect.Size().Y, 0)

	// Set WM hints so that Openbox puts the window into the dock.
	hints := &icccm.Hints{
		Flags:        icccm.HintState | icccm.HintIconWindow,
		InitialState: icccm.StateWithdrawn,
		IconWindow:   win.Id,
		WindowGroup:  win.Id,
	}
	err = icccm.WmHintsSet(x, win.Id, hints)
	if err != nil {
		win.Destroy()
		return nil, fmt.Errorf("wm hints: %v", err)
	}
	img := xgraphics.New(x, rect)
	err = img.XSurfaceSet(win.Id)
	if err != nil {
		img.Destroy()
		win.Destroy()
		return nil, fmt.Errorf("xsurface set: %v", err)
	}
	app := &DockApp{
		x:   x,
		img: img,
		win: win,
	}
	return app, nil
}
示例#17
0
文件: rect.go 项目: jvlmdr/go-cv
// Takes a bounding box in an image r.
// Coerces it to the aspect ratio of target.Int according to mode.
// Returns the rectangle which, when resized to target.Size,
// will have the bounding box in target.Int.
// Panics if the target has non-positive interior.
func FitRect(orig image.Rectangle, target PadRect, mode string) (scale float64, fit image.Rectangle) {
	if target.Int.Dx() <= 0 || target.Int.Dy() <= 0 {
		panic("empty interior")
	}
	if mode == "stretch" {
		panic("stretch mode not supported by FitRect")
	}
	aspect := float64(target.Int.Dx()) / float64(target.Int.Dy())
	// Width and height of box in image.
	w, h := float64(orig.Dx()), float64(orig.Dy())
	// Co-erce size to match aspect ratio.
	w, h = SetAspect(w, h, aspect, mode)
	// If source is smaller than target, then scale is > 1 (i.e. need to magnify).
	scale = float64(target.Int.Dx()) / w // == float64(target.Int.Dy()) / h
	// Get position of interior centroid in target rectangle.
	left, top := centroid(target.Int)
	right, bottom := float64(target.Size.X)-left, float64(target.Size.Y)-top
	// Get position of centroid of original bounding box in image.
	x, y := centroid(orig)
	// Scale offsets on all sides and add to centroid for final rectangle.
	// If scale is greater than 1 then source is smaller than target.
	// Then the rectangle in the source image is shrunk (i.e. divide by scale).
	x0, x1 := x-left/scale, x+right/scale
	y0, y1 := y-top/scale, y+bottom/scale
	fit = image.Rect(round(x0), round(y0), round(x1), round(y1))
	return
}
示例#18
0
// PackHorzontal finds the Pos for a horizontally packed sprite
func (l *ImageList) PackHorizontal(pos int) Pos {
	if pos == -1 || pos == 0 {
		return Pos{0, 0}
	}
	var x, y int
	var rect image.Rectangle

	// there are n-1 paddings in an image list
	x = l.Padding * pos
	// No padding on the outside of the image
	if pos == len(l.GoImages) {
		x -= l.Padding
	}
	for i := 1; i <= pos; i++ {
		rect = l.GoImages[i-1].Bounds()
		x += rect.Dx()
		if pos == len(l.GoImages) {
			y = int(math.Max(float64(y), float64(rect.Dy())))
		}
	}

	return Pos{
		x, y,
	}
}
示例#19
0
文件: draw.go 项目: h8liu/golang
func (floydSteinberg) Draw(dst Image, r image.Rectangle, src image.Image, sp image.Point) {
	clip(dst, &r, src, &sp, nil, nil)
	if r.Empty() {
		return
	}
	drawPaletted(dst, r, src, sp, true)
}
示例#20
0
文件: draw.go 项目: h8liu/golang
func drawGlyphOver(dst *image.RGBA, r image.Rectangle, src *image.Uniform, mask *image.Alpha, mp image.Point) {
	i0 := dst.PixOffset(r.Min.X, r.Min.Y)
	i1 := i0 + r.Dx()*4
	mi0 := mask.PixOffset(mp.X, mp.Y)
	sr, sg, sb, sa := src.RGBA()
	for y, my := r.Min.Y, mp.Y; y != r.Max.Y; y, my = y+1, my+1 {
		for i, mi := i0, mi0; i < i1; i, mi = i+4, mi+1 {
			ma := uint32(mask.Pix[mi])
			if ma == 0 {
				continue
			}
			ma |= ma << 8

			dr := uint32(dst.Pix[i+0])
			dg := uint32(dst.Pix[i+1])
			db := uint32(dst.Pix[i+2])
			da := uint32(dst.Pix[i+3])

			// The 0x101 is here for the same reason as in drawRGBA.
			a := (m - (sa * ma / m)) * 0x101

			dst.Pix[i+0] = uint8((dr*a + sr*ma) / m >> 8)
			dst.Pix[i+1] = uint8((dg*a + sg*ma) / m >> 8)
			dst.Pix[i+2] = uint8((db*a + sb*ma) / m >> 8)
			dst.Pix[i+3] = uint8((da*a + sa*ma) / m >> 8)
		}
		i0 += dst.Stride
		i1 += dst.Stride
		mi0 += mask.Stride
	}
}
示例#21
0
func (c *NativeCanvas) BlitToContext(nc NativeContext, x int, y int, srcRc *image.Rectangle) {
	// log.Printf("NativeCanvas.BlitToContext(...)")
	var srcDC = c.BeginPaint()

	if srcRc == nil {
		var tempRc = image.Rect(0, 0, c.W(), c.H())
		srcRc = &tempRc
	}

	var copyWidth = srcRc.Dx()
	var copyHeight = srcRc.Dy()

	if c.Opaque() {
		// log.Printf("BitBlt(%v %v %v)", x, y, *srcRc)

		var err = BitBlt(Handle(nc),
			int32(x), int32(y), int32(copyWidth), int32(copyHeight),
			Handle(srcDC),
			int32(srcRc.Min.X), int32(srcRc.Min.Y),
			SRCCOPY)

		if err != nil {
			log.Printf("BitBlt(...) %v", err)
		}
	} else {
		var bf = BLENDFUNCTION{AC_SRC_OVER, 0, 255, AC_SRC_ALPHA}
		GdiAlphaBlend(Handle(nc),
			int32(x), int32(y), int32(copyWidth), int32(copyHeight),
			Handle(srcDC),
			int32(srcRc.Min.X), int32(srcRc.Min.Y), int32(copyWidth), int32(copyHeight),
			bf)
	}

	c.EndPaint()
}
示例#22
0
文件: draw.go 项目: machinaut/go
func drawGlyphOver(dst *image.RGBA, r image.Rectangle, src *image.ColorImage, mask *image.Alpha, mp image.Point) {
	i0 := (r.Min.Y-dst.Rect.Min.Y)*dst.Stride + r.Min.X - dst.Rect.Min.X
	i1 := i0 + r.Dx()
	j0 := (mp.Y-mask.Rect.Min.Y)*mask.Stride + mp.X - mask.Rect.Min.X
	cr, cg, cb, ca := src.RGBA()
	for y, my := r.Min.Y, mp.Y; y != r.Max.Y; y, my = y+1, my+1 {
		dpix := dst.Pix[i0:i1]
		mpix := mask.Pix[j0:]
		for i, rgba := range dpix {
			ma := uint32(mpix[i].A)
			if ma == 0 {
				continue
			}
			ma |= ma << 8
			dr := uint32(rgba.R)
			dg := uint32(rgba.G)
			db := uint32(rgba.B)
			da := uint32(rgba.A)
			// The 0x101 is here for the same reason as in drawRGBA.
			a := (m - (ca * ma / m)) * 0x101
			dr = (dr*a + cr*ma) / m
			dg = (dg*a + cg*ma) / m
			db = (db*a + cb*ma) / m
			da = (da*a + ca*ma) / m
			dpix[i] = image.RGBAColor{uint8(dr >> 8), uint8(dg >> 8), uint8(db >> 8), uint8(da >> 8)}
		}
		i0 += dst.Stride
		i1 += dst.Stride
		j0 += mask.Stride
	}
}
示例#23
0
func (v *mappingView) drawArch(context *cairo.Context, r image.Rectangle) {
	for _, a := range v.arch {
		if r.Overlaps(a.BBox()) {
			a.Draw(context)
		}
	}
}
示例#24
0
文件: xgb.go 项目: Zwobot/go.wde
func (buffer Image) CopyRGBA(src *image.RGBA, r image.Rectangle) {
	// clip r against each image's bounds and move sp accordingly (see draw.clip())
	sp := image.ZP
	orig := r.Min
	r = r.Intersect(buffer.Bounds())
	r = r.Intersect(src.Bounds().Add(orig.Sub(sp)))
	dx := r.Min.X - orig.X
	dy := r.Min.Y - orig.Y
	(sp).X += dx
	(sp).Y += dy

	i0 := (r.Min.X - buffer.Rect.Min.X) * 4
	i1 := (r.Max.X - buffer.Rect.Min.X) * 4
	si0 := (sp.X - src.Rect.Min.X) * 4
	yMax := r.Max.Y - buffer.Rect.Min.Y

	y := r.Min.Y - buffer.Rect.Min.Y
	sy := sp.Y - src.Rect.Min.Y
	for ; y != yMax; y, sy = y+1, sy+1 {
		dpix := buffer.Pix[y*buffer.Stride:]
		spix := src.Pix[sy*src.Stride:]

		for i, si := i0, si0; i < i1; i, si = i+4, si+4 {
			dpix[i+0] = spix[si+2]
			dpix[i+1] = spix[si+1]
			dpix[i+2] = spix[si+0]
			dpix[i+3] = spix[si+3]
		}
	}
}
示例#25
0
文件: buffer.go 项目: rdterner/exp
func (b *bufferImpl) upload(u screen.Uploader, xd xproto.Drawable, xg xproto.Gcontext, depth uint8,
	dp image.Point, sr image.Rectangle, sender screen.Sender) {

	b.preUpload(sender != nil)

	// TODO: adjust if dp is outside dst bounds, or sr is outside src bounds.
	dr := sr.Sub(sr.Min).Add(dp)

	b.s.mu.Lock()
	b.s.nPendingUploads++
	b.s.mu.Unlock()

	cookie := shm.PutImage(
		b.s.xc, xd, xg,
		uint16(b.size.X), uint16(b.size.Y), // TotalWidth, TotalHeight,
		uint16(sr.Min.X), uint16(sr.Min.Y), // SrcX, SrcY,
		uint16(dr.Dx()), uint16(dr.Dy()), // SrcWidth, SrcHeight,
		int16(dr.Min.X), int16(dr.Min.Y), // DstX, DstY,
		depth, xproto.ImageFormatZPixmap,
		1, b.xs, 0, // 1 means send a completion event, 0 means a zero offset.
	)

	b.s.mu.Lock()
	b.s.uploads[cookie.Sequence] = completion{
		sender: sender,
		event: screen.UploadedEvent{
			Buffer:   b,
			Uploader: u,
		},
	}
	b.s.nPendingUploads--
	b.s.handleCompletions()
	b.s.mu.Unlock()
}
示例#26
0
文件: draw.go 项目: imagexec/go-1
func drawCopySrc(dst *image.RGBA, r image.Rectangle, src *image.RGBA, sp image.Point) {
	n, dy := 4*r.Dx(), r.Dy()
	d0 := dst.PixOffset(r.Min.X, r.Min.Y)
	s0 := src.PixOffset(sp.X, sp.Y)
	var ddelta, sdelta int
	if r.Min.Y <= sp.Y {
		ddelta = dst.Stride
		sdelta = src.Stride
	} else {
		// If the source start point is higher than the destination start
		// point, then we compose the rows in bottom-up order instead of
		// top-down. Unlike the drawCopyOver function, we don't have to check
		// the x coordinates because the built-in copy function can handle
		// overlapping slices.
		d0 += (dy - 1) * dst.Stride
		s0 += (dy - 1) * src.Stride
		ddelta = -dst.Stride
		sdelta = -src.Stride
	}
	for ; dy > 0; dy-- {
		copy(dst.Pix[d0:d0+n], src.Pix[s0:s0+n])
		d0 += ddelta
		s0 += sdelta
	}
}
示例#27
0
文件: crop.go 项目: urlist/avatar
func Crop(m image.Image, r image.Rectangle, w, h int) image.Image {
	if w < 0 || h < 0 {
		return nil
	}
	if w == 0 || h == 0 || r.Dx() <= 0 || r.Dy() <= 0 {
		return image.NewRGBA64(image.Rect(0, 0, w, h))
	}
	curw, curh := r.Min.X, r.Min.Y

	img := image.NewRGBA(image.Rect(0, 0, w, h))

	for y := 0; y < h; y++ {
		for x := 0; x < w; x++ {
			// Get a source pixel.
			subx := curw + x
			suby := curh + y

			r32, g32, b32, a32 := m.At(subx, suby).RGBA()
			r := uint8(r32 >> 8)
			g := uint8(g32 >> 8)
			b := uint8(b32 >> 8)
			a := uint8(a32 >> 8)

			img.SetRGBA(x, y, color.RGBA{r, g, b, a})
		}
	}

	return img
}
示例#28
0
func (v *mappingView) drawConnections(context *cairo.Context, r image.Rectangle) {
	for _, c := range v.connections {
		box := c.BBox()
		if r.Overlaps(box) {
			c.Draw(context)
		}
	}
}
示例#29
0
func drawsq(b *draw.Image, p image.Point, ptx int) {
	var r image.Rectangle
	r.Min = p
	r.Max.X = r.Min.X + pcsz
	r.Max.Y = r.Min.Y + pcsz
	b.Draw(r, display.Black, nil, image.ZP)
	b.Draw(r.Inset(1), tx[ptx], nil, image.ZP)
}
示例#30
0
文件: gen.go 项目: jvlmdr/go-cv
// ToImageRect converts a point in the feature pyramid to a rectangle in the image.
func (pyr *Generator) ToImageRect(level int, pt image.Point, interior image.Rectangle) image.Rectangle {
	// Translate interior by position (scaled by rate) and subtract margin offset.
	rate := pyr.Transform.Rate()
	offset := pyr.Pad.Margin.TopLeft()
	scale := pyr.Image.Scales[level]
	rect := interior.Add(pt.Mul(rate)).Sub(offset)
	return scaleRect(1/scale, rect)
}