func (p *GesturePane) Render() (*image.RGBA, error) {
img := image.NewRGBA(image.Rect(0, 0, 16, 16))
if p.last != nil {
x := math.Floor(float64(p.last.Position.X)/float64(0xffff)*float64(16)) + 0.5
y := math.Floor(float64(p.last.Position.Y)/float64(0xffff)*float64(16)) + 0.5
z := math.Floor(float64(p.last.Position.Z)/float64(0xffff)*float64(16)) + 0.5
r, _ := colorful.Hex("#FF000")
g, _ := colorful.Hex("#00FF00")
b, _ := colorful.Hex("#0000FF")
gc := draw2d.NewGraphicContext(img)
gc.SetStrokeColor(r)
gc.MoveTo(0, x)
gc.LineTo(16, x)
gc.Stroke()
gc.SetStrokeColor(g)
gc.MoveTo(y, 0)
gc.LineTo(y, 16)
gc.Stroke()
gc.SetStrokeColor(b)
gc.MoveTo(16-z, 0)
gc.LineTo(16-z, 16)
gc.Stroke()
}
return img, nil
}
func test(t *testing.T, draw sample) {
// Initialize the graphic context on an RGBA image
dest := image.NewRGBA(image.Rect(0, 0, 297, 210.0))
gc := draw2dimg.NewGraphicContext(dest)
// Draw Android logo
output, err := draw(gc, "png")
if err != nil {
t.Errorf("Drawing %q failed: %v", output, err)
return
}
// Save to png
err = draw2dimg.SaveToPngFile(output, dest)
if err != nil {
t.Errorf("Saving %q failed: %v", output, err)
}
}
func imgPng(w http.ResponseWriter, r *http.Request) *appError {
w.Header().Set("Content-type", "image/png")
// Initialize the graphic context on an RGBA image
dest := image.NewRGBA(image.Rect(0, 0, 297, 210.0))
gc := draw2dimg.NewGraphicContext(dest)
// Draw sample
android.Draw(gc, 65, 0)
err := png.Encode(w, dest)
if err != nil {
return &appError{err, fmt.Sprintf("Can't encode: %s", err), 500}
}
return nil
}
func TestCircle(t *testing.T) {
width := 200
height := 200
img := image.NewRGBA(image.Rect(0, 0, width, height))
gc := draw2dimg.NewGraphicContext(img)
gc.SetStrokeColor(color.NRGBA{255, 255, 255, 255})
gc.SetFillColor(color.NRGBA{255, 255, 255, 255})
gc.Clear()
gc.SetStrokeColor(color.NRGBA{255, 0, 0, 255})
gc.SetLineWidth(1)
// Draw a circle
Circle(gc, 100, 100, 50)
gc.Stroke()
draw2dimg.SaveToPngFile("../output/draw2dkit/TestCircle.png", img)
}
func DrawPoint(toilets []models.Toilet, b *models.Bounds, imgWidth int, imgHeight int) string {
// fmt.Println(imgWidth,imgHeight);
filename := strconv.Itoa(b.Min.X) + "_" + strconv.Itoa(b.Min.Y)
filename += "_" + strconv.Itoa(b.Max.X) + "_" + strconv.Itoa(b.Max.Y)
filename += "_" + strconv.Itoa(imgWidth) + "_" + strconv.Itoa(imgHeight) + ".png"
HRes := b.GetWidth() / imgWidth
VRes := b.GetHeight() / imgHeight
dest := image.NewRGBA(image.Rect(0, 0, imgWidth, imgHeight))
gc := draw2dimg.NewGraphicContext(dest)
gc.SetFillColor(color.RGBA{0x44, 0xff, 0x44, 0xff})
gc.SetStrokeColor(color.RGBA{0x44, 0x44, 0x44, 0xff})
for _, toilet := range toilets {
dx := (toilet.Geom.Lng - float64(b.Min.X)) / float64(HRes) //x
dy := float64(imgHeight) - (toilet.Geom.Lat-float64(b.Min.Y))/float64(VRes) //y
// fmt.Println("toilet :", toilet,dx,dy);
draw2dkit.Circle(gc, dx, dy, 3)
gc.FillStroke()
}
gc.Close()
draw2dimg.SaveToPngFile(revel.BasePath+"/output/wms/"+filename, dest)
return filename
}
// Get a new Graphic Context where to draw
func (c *Canvas) GetContext() *CanvasContext {
gc := draw2dimg.NewGraphicContext(&(c.RGBA))
cnv := CanvasContext{*gc, (*c).size}
return &cnv
}