// NewImage returns a new image canvas // that draws to the given image. The // minimum point of the given image // should probably be 0,0. func NewImage(img draw.Image, name string) (*Canvas, error) { w := float64(img.Bounds().Max.X - img.Bounds().Min.X) h := float64(img.Bounds().Max.Y - img.Bounds().Min.Y) X, err := xgbutil.NewConn() if err != nil { return nil, err } keybind.Initialize(X) ximg := xgraphics.New(X, image.Rect(0, 0, int(w), int(h))) err = ximg.CreatePixmap() if err != nil { return nil, err } painter := NewPainter(ximg) gc := draw2d.NewGraphicContextWithPainter(ximg, painter) gc.SetDPI(dpi) gc.Scale(1, -1) gc.Translate(0, -h) wid := ximg.XShowExtra(name, true) go func() { xevent.Main(X) }() c := &Canvas{ Canvas: vgimg.NewWith(vgimg.UseImageWithContext(img, gc)), x: X, ximg: ximg, wid: wid, } vg.Initialize(c) return c, nil }
func (c *Calibrate) Update(entity *ecs.Entity, dt float32) { if c.frameIndex != 0 { return } var ( cal *CalibrateComponent ok bool ) if cal, ok = entity.ComponentFast(cal).(*CalibrateComponent); !ok { return } // Render the image again plt, err := plot.New() if err != nil { log.Fatal(err) } plotutil.AddLinePoints(plt, "CH"+strconv.Itoa(int(cal.ChannelIndex)), plotter.XYer(c.channels[cal.ChannelIndex])) img := image.NewRGBA(image.Rect(0, 0, 3*dpi, 3*dpi)) canv := vgimg.NewWith(vgimg.UseImage(img)) plt.Draw(draw.New(canv)) bgTexture := engi.NewImageRGBA(img) // Give it to engi erender := &engi.RenderComponent{ Display: engi.NewRegion(engi.NewTexture(bgTexture), 0, 0, 3*dpi, 3*dpi), Scale: engi.Point{1, 1}, Transparency: 1, Color: color.RGBA{255, 255, 255, 255}, } erender.SetPriority(engi.HUDGround) entity.AddComponent(erender) }