Example #1
0
// Main draws "Hello World" and returns the filename. This should only be
// used during testing.
func Main(gc draw2d.GraphicContext, ext string) (string, error) {
	// Draw hello world
	Draw(gc, fmt.Sprintf("Hello World %d dpi", gc.GetDPI()))

	// Return the output filename
	return samples.Output("helloworld", ext), nil
}
Example #2
0
func (h *spaceFillingImage) drawSnake(gc draw2d.GraphicContext, snake *draw2d.Path) {
	gc.SetStrokeColor(h.SnakeColor)
	gc.SetLineCap(draw2d.SquareCap)
	gc.SetLineJoin(draw2d.MiterJoin)
	gc.SetLineWidth(2)

	gc.Stroke(snake)
}
Example #3
0
File: vgimg.go Project: zzn01/plot
// UseImageWithContext specifies both an image
// and a graphic context to create the canvas from.
// The minimum point of the given image
// should probably be 0,0.
func UseImageWithContext(img draw.Image, gc draw2d.GraphicContext) option {
	return func(c *Canvas) uint32 {
		c.img = img
		c.gc = gc
		c.dpi = gc.GetDPI()
		return setsDPI | setsSize
	}
}
Example #4
0
func lineCircle(gc d2d.GraphicContext, cx, cy, r float64) {
	count := int(1000.0 * r)

	trace := traceCircle(count, cx, cy, r)

	gc.MoveTo(cx+r, cy)

	for _, pos := range trace {
		gc.LineTo(pos.X, pos.Y)
	}
}
Example #5
0
func (ps *PolygonSymbolizer) Draw(gc draw2d.GraphicContext, shape geom.Shape) {
	if !ps.Applies(shape) {
		return
	}
	if polygon, ok := shape.(geom.PolygonShape); ok {
		gc.SetFillColor(ps.s.Fill)
		for _, path := range polygon.Polygon() {
			l := ps.r.coordsAsPath(path)
			gc.Fill(l)
		}
	}
}
Example #6
0
func (c squareplot) draw(gc d2d.GraphicContext) {
	for _, cb := range c.boxes {
		gc.SetStrokeColor(black)
		gc.SetFillColor(clear)
		gc.SetLineWidth(1.0)

		side := cb.Radius / 2.0
		lineSquare(gc, cb.P.X, cb.P.Y, side)
		gc.Close()
		gc.FillStroke()
	}
}
Example #7
0
// Draw "Hello World"
func Draw(gc draw2d.GraphicContext, text string) {
	// Draw a rounded rectangle using default colors
	draw2dkit.RoundedRectangle(gc, 5, 5, 135, 95, 10, 10)
	gc.FillStroke()

	// Set the font luximbi.ttf
	gc.SetFontData(draw2d.FontData{Name: "luxi", Family: draw2d.FontFamilyMono, Style: draw2d.FontStyleBold | draw2d.FontStyleItalic})
	// Set the fill text color to black
	gc.SetFillColor(image.Black)
	gc.SetFontSize(14)
	// Display Hello World
	gc.FillStringAt("Hello World", 8, 52)
}
Example #8
0
// Main draws vertically spaced lines and returns the filename.
// This should only be used during testing.
func Main(gc draw2d.GraphicContext, ext string) (string, error) {
	gc.SetFillRule(draw2d.FillRuleWinding)
	gc.Clear()
	// Draw the line
	for x := 5.0; x < 297; x += 10 {
		Draw(gc, x, 0, x, 210)
	}
	gc.ClearRect(100, 75, 197, 135)
	draw2d.Ellipse(gc, 148.5, 105, 35, 25)
	gc.SetFillColor(color.RGBA{0xff, 0xff, 0x44, 0xff})
	gc.FillStroke()

	// Return the output filename
	return samples.Output("line", ext), nil
}
Example #9
0
func (h *spaceFillingImage) drawRectange(gc draw2d.GraphicContext, px1, py1, px2, py2 float64) {
	gc.SetFillColor(h.BackgroundColor)
	gc.SetStrokeColor(h.GridColor)
	gc.SetLineWidth(1)

	draw2dkit.Rectangle(gc, px1, py1, px2, py2)
	gc.FillStroke()
}
Example #10
0
func (ex exploder) draw(gc d2d.GraphicContext) {
	for _, b := range ex.bombs {
		c := ex.palette.Get(b.Color)
		//        alpha := b.Intensity / 2
		trans := color.RGBA{c.R, c.G, c.B, 255}
		gc.SetStrokeColor(trans)
		gc.SetFillColor(trans)
		gc.SetLineWidth(1.0)

		lineCircle(gc, b.P.X, b.P.Y, b.Radius)

		gc.Close()
		gc.Stroke()
	}
}
Example #11
0
File: 2d.go Project: taysom/va
func Plot(g draw2d.GraphicContext, points []Point) {
	g.MoveTo(0, 0)
	for _, p := range points {
		g.LineTo(p.x*100, p.y*100)
	}
	g.Close()
	g.FillStroke()
}
Example #12
0
// Main draws the tiger
func Main(gc draw2d.GraphicContext, ext string) (string, error) {
	gc.Save()

	// flip the image
	gc.Translate(0, 200)
	gc.Scale(0.35, -0.35)
	gc.Translate(70, -200)

	// Tiger postscript drawing
	tiger := samples.Resource("image", "tiger.ps", ext)

	// Draw tiger
	Draw(gc, tiger)
	gc.Restore()

	// Return the output filename
	return samples.Output("postscript", ext), nil
}
Example #13
0
func (ts *TextSymbolizer) Draw(gc draw2d.GraphicContext, shape geom.Shape) {
	if !ts.Applies(shape) {
		return
	}
	if name := shape.Attribute(ts.s.Attr); name != "" {
		gc.SetFontSize(ts.s.Size)
		l, t, r, b := gc.GetStringBounds(name)
		bb := shape.Bbox()
		dx := math.Abs(bb[2] - bb[0])
		dy := math.Abs(bb[3] - bb[1])
		ox, oy := dx/2, dy/2

		x, y := ts.r.matrix.TransformPoint(bb[0]+ox, bb[1]-oy)
		gc.SetFillColor(ts.s.Fill)
		gc.FillStringAt(name, x-(r-l)/2, y-(t-b)/2)
	}
}
Example #14
0
func (ps *PathSymbolizer) Draw(gc draw2d.GraphicContext, shape geom.Shape) {
	if !ps.Applies(shape) {
		return
	}
	gc.SetStrokeColor(ps.s.Stroke)
	gc.SetLineWidth(ps.s.Weight)
	switch specific := shape.(type) {
	case geom.LineShape:
		l := ps.r.coordsAsPath(specific.Path())
		gc.Stroke(l)
	case geom.MultiLineShape:
		for _, path := range specific.Paths() {
			l := ps.r.coordsAsPath(path)
			gc.Stroke(l)
		}
	}
}
Example #15
0
// Main draws a left hand and ear of a gopher. Afterwards it returns
// the filename. This should only be used during testing.
func Main(gc draw2d.GraphicContext, ext string) (string, error) {
	gc.Save()
	gc.Scale(0.5, 0.5)
	// Draw a (partial) gopher
	Draw(gc)
	gc.Restore()

	// Return the output filename
	return samples.Output("gopher", ext), nil
}
Example #16
0
func lineSquare(gc d2d.GraphicContext, x, y, side float64) {
	xmin, ymin := x-side, y-side
	xmax, ymax := x+side, y+side

	gc.MoveTo(xmin, ymin)
	gc.LineTo(xmin, ymax)
	gc.LineTo(xmax, ymax)
	gc.LineTo(xmax, ymin)
	gc.LineTo(xmin, ymin)
}
Example #17
0
func drawText(gc draw2d.GraphicContext, text string, x, y float64) {
	var fontSize float64 = 14
	fontSizeHeight := fontSize + 14
	if y < fontSizeHeight {
		return
	}
	gc.SetFontData(draw2d.FontData{Name: "luxi", Family: draw2d.FontFamilyMono, Style: draw2d.FontStyleNormal})
	// Set the fill text color to black

	gc.SetFillColor(image.Black)
	gc.SetFontSize(fontSize)
	// 9px width each letter and 2px letter spacing at font-size 14

	var yPos float64
	for ; yPos < y; yPos = yPos + fontSizeHeight {
		gc.FillStringAt(text, x, yPos)
	}
}
Example #18
0
func (h *spaceFillingImage) drawText(gc draw2d.GraphicContext, px1, py1 float64, t int) {
	if !h.DrawText {
		return
	}

	text := strconv.Itoa(t)
	_, top, _, _ := gc.GetStringBounds(text)

	gc.SetFillColor(h.TextColor)
	gc.FillStringAt(text, px1+h.TextMargin, py1-top+h.TextMargin)
}
Example #19
0
// Arc draws a link between two points
func Arc(gc draw2d.GraphicContext, x, y1, y2 float64) {
	// Center
	yc := (y1 + y2) / 2
	// x radius
	xRadius := y2 - y1
	// y radius
	yRadius := y2 - yc
	// Start at -45 degrees
	startAngle := -math.Pi / 2
	// 180 degrees = half a circle
	angle := math.Pi
	gc.ArcTo(x, yc, xRadius, yRadius, startAngle, angle)
	gc.Stroke()
	gc.Fill()
}
Example #20
0
// Draw a left hand and ear of a gopher using a gc thanks to
// https://github.com/golang-samples/gopher-vector/
func Draw(gc draw2d.GraphicContext) {
	// Initialize Stroke Attribute
	gc.SetLineWidth(3)
	gc.SetLineCap(draw2d.RoundCap)
	gc.SetStrokeColor(color.Black)

	// Left hand
	// <path fill-rule="evenodd" clip-rule="evenodd" fill="#F6D2A2" stroke="#000000" stroke-width="3" stroke-linecap="round" d="
	// M10.634,300.493c0.764,15.751,16.499,8.463,23.626,3.539c6.765-4.675,8.743-0.789,9.337-10.015
	// c0.389-6.064,1.088-12.128,0.744-18.216c-10.23-0.927-21.357,1.509-29.744,7.602C10.277,286.542,2.177,296.561,10.634,300.493"/>
	gc.SetFillColor(color.RGBA{0xF6, 0xD2, 0xA2, 0xff})
	gc.MoveTo(10.634, 300.493)
	gc.RCubicCurveTo(0.764, 15.751, 16.499, 8.463, 23.626, 3.539)
	gc.RCubicCurveTo(6.765, -4.675, 8.743, -0.789, 9.337, -10.015)
	gc.RCubicCurveTo(0.389, -6.064, 1.088, -12.128, 0.744, -18.216)
	gc.RCubicCurveTo(-10.23, -0.927, -21.357, 1.509, -29.744, 7.602)
	gc.CubicCurveTo(10.277, 286.542, 2.177, 296.561, 10.634, 300.493)
	gc.FillStroke()

	// <path fill-rule="evenodd" clip-rule="evenodd" fill="#C6B198" stroke="#000000" stroke-width="3" stroke-linecap="round" d="
	// M10.634,300.493c2.29-0.852,4.717-1.457,6.271-3.528"/>
	gc.MoveTo(10.634, 300.493)
	gc.RCubicCurveTo(2.29, -0.852, 4.717, -1.457, 6.271, -3.528)
	gc.Stroke()

	// Left Ear
	// <path fill-rule="evenodd" clip-rule="evenodd" fill="#6AD7E5" stroke="#000000" stroke-width="3" stroke-linecap="round" d="
	// M46.997,112.853C-13.3,95.897,31.536,19.189,79.956,50.74L46.997,112.853z"/>
	gc.MoveTo(46.997, 112.853)
	gc.CubicCurveTo(-13.3, 95.897, 31.536, 19.189, 79.956, 50.74)
	gc.LineTo(46.997, 112.853)
	gc.Close()
	gc.Stroke()
}
Example #21
0
// ArcNegative draws an arc with a negative angle (anti clockwise).
func ArcNegative(gc draw2d.GraphicContext, xc, yc, width, height float64) {
	xc += width / 2
	yc += height / 2
	radiusX, radiusY := width/2, height/2
	startAngle := 45.0 * (math.Pi / 180.0) /* angles are specified */
	angle := -225 * (math.Pi / 180.0)      /* clockwise in radians */
	gc.SetLineWidth(width / 10)
	gc.SetLineCap(draw2d.ButtCap)
	gc.SetStrokeColor(image.Black)

	gc.ArcTo(xc, yc, radiusX, radiusY, startAngle, angle)
	gc.Stroke()
	// fill a circle
	gc.SetStrokeColor(color.NRGBA{255, 0x33, 0x33, 0x80})
	gc.SetFillColor(color.NRGBA{255, 0x33, 0x33, 0x80})
	gc.SetLineWidth(width / 20)

	gc.MoveTo(xc+math.Cos(startAngle)*radiusX, yc+math.Sin(startAngle)*radiusY)
	gc.LineTo(xc, yc)
	gc.LineTo(xc-radiusX, yc)
	gc.Stroke()

	gc.ArcTo(xc, yc, width/10.0, height/10.0, 0, 2*math.Pi)
	gc.Fill()
}
Example #22
0
// CurveRectangle draws a rectangle with bezier curves (not rounded rectangle).
func CurveRectangle(gc draw2d.GraphicContext, x0, y0,
	rectWidth, rectHeight float64, stroke, fill color.Color) {
	radius := (rectWidth + rectHeight) / 4

	x1 := x0 + rectWidth
	y1 := y0 + rectHeight
	if rectWidth/2 < radius {
		if rectHeight/2 < radius {
			gc.MoveTo(x0, (y0+y1)/2)
			gc.CubicCurveTo(x0, y0, x0, y0, (x0+x1)/2, y0)
			gc.CubicCurveTo(x1, y0, x1, y0, x1, (y0+y1)/2)
			gc.CubicCurveTo(x1, y1, x1, y1, (x1+x0)/2, y1)
			gc.CubicCurveTo(x0, y1, x0, y1, x0, (y0+y1)/2)
		} else {
			gc.MoveTo(x0, y0+radius)
			gc.CubicCurveTo(x0, y0, x0, y0, (x0+x1)/2, y0)
			gc.CubicCurveTo(x1, y0, x1, y0, x1, y0+radius)
			gc.LineTo(x1, y1-radius)
			gc.CubicCurveTo(x1, y1, x1, y1, (x1+x0)/2, y1)
			gc.CubicCurveTo(x0, y1, x0, y1, x0, y1-radius)
		}
	} else {
		if rectHeight/2 < radius {
			gc.MoveTo(x0, (y0+y1)/2)
			gc.CubicCurveTo(x0, y0, x0, y0, x0+radius, y0)
			gc.LineTo(x1-radius, y0)
			gc.CubicCurveTo(x1, y0, x1, y0, x1, (y0+y1)/2)
			gc.CubicCurveTo(x1, y1, x1, y1, x1-radius, y1)
			gc.LineTo(x0+radius, y1)
			gc.CubicCurveTo(x0, y1, x0, y1, x0, (y0+y1)/2)
		} else {
			gc.MoveTo(x0, y0+radius)
			gc.CubicCurveTo(x0, y0, x0, y0, x0+radius, y0)
			gc.LineTo(x1-radius, y0)
			gc.CubicCurveTo(x1, y0, x1, y0, x1, y0+radius)
			gc.LineTo(x1, y1-radius)
			gc.CubicCurveTo(x1, y1, x1, y1, x1-radius, y1)
			gc.LineTo(x0+radius, y1)
			gc.CubicCurveTo(x0, y1, x0, y1, x0, y1-radius)
		}
	}
	gc.Close()
	gc.SetStrokeColor(stroke)
	gc.SetFillColor(fill)
	gc.SetLineWidth(10.0)
	gc.FillStroke()
}
Example #23
0
// Dash draws a line with a dash pattern
func Dash(gc draw2d.GraphicContext, x, y, width, height float64) {
	sx, sy := width/162, height/205
	gc.SetStrokeColor(image.Black)
	gc.SetLineDash([]float64{height / 10, height / 50, height / 50, height / 50}, -50.0)
	gc.SetLineCap(draw2d.ButtCap)
	gc.SetLineJoin(draw2d.RoundJoin)
	gc.SetLineWidth(height / 50)

	gc.MoveTo(x+sx*60.0, y)
	gc.LineTo(x+sx*60.0, y)
	gc.LineTo(x+sx*162, y+sy*205)
	gc.RLineTo(sx*-102.4, 0.0)
	gc.CubicCurveTo(x+sx*-17, y+sy*205, x+sx*-17, y+sy*103, x+sx*60.0, y+sy*103.0)
	gc.Stroke()
	gc.SetLineDash(nil, 0.0)
}
Example #24
0
// Bubble draws a text balloon.
func Bubble(gc draw2d.GraphicContext, x, y, width, height float64) {
	sx, sy := width/100, height/100
	gc.MoveTo(x+sx*50, y)
	gc.QuadCurveTo(x, y, x, y+sy*37.5)
	gc.QuadCurveTo(x, y+sy*75, x+sx*25, y+sy*75)
	gc.QuadCurveTo(x+sx*25, y+sy*95, x+sx*5, y+sy*100)
	gc.QuadCurveTo(x+sx*35, y+sy*95, x+sx*40, y+sy*75)
	gc.QuadCurveTo(x+sx*100, y+sy*75, x+sx*100, y+sy*37.5)
	gc.QuadCurveTo(x+sx*100, y, x+sx*50, y)
	gc.Stroke()
}
Example #25
0
// Star draws many lines from a center.
func Star(gc draw2d.GraphicContext, x, y, width, height float64) {
	gc.Save()
	gc.Translate(x+width/2, y+height/2)
	gc.SetLineWidth(width / 40)
	for i := 0.0; i < 360; i = i + 10 { // Go from 0 to 360 degrees in 10 degree steps
		gc.Save()                        // Keep rotations temporary
		gc.Rotate(i * (math.Pi / 180.0)) // Rotate by degrees on stack from 'for'
		gc.MoveTo(0, 0)
		gc.LineTo(width/2, 0)
		gc.Stroke()
		gc.Restore()
	}
	gc.Restore()
}
Example #26
0
// PathTransform scales a path differently in horizontal and vertical direction.
func PathTransform(gc draw2d.GraphicContext, x, y, width, height float64) {
	gc.Save()
	gc.SetLineWidth(width / 10)
	gc.Translate(x+width/2, y+height/2)
	gc.Scale(1, 4)
	gc.ArcTo(0, 0, width/8, height/8, 0, math.Pi*2)
	gc.Close()
	gc.Stroke()
	gc.Restore()
}
Example #27
0
// FillStyle demonstrates the difference between even odd and non zero winding rule.
func FillStyle(gc draw2d.GraphicContext, x, y, width, height float64) {
	sx, sy := width/232, height/220
	gc.SetLineWidth(width / 40)

	draw2d.Rect(gc, x+sx*0, y+sy*12, x+sx*232, y+sy*70)

	wheel1 := new(draw2d.PathStorage)
	wheel1.ArcTo(x+sx*52, y+sy*70, sx*40, sy*40, 0, 2*math.Pi)
	wheel2 := new(draw2d.PathStorage)
	wheel2.ArcTo(x+sx*180, y+sy*70, sx*40, sy*40, 0, -2*math.Pi)

	gc.SetFillRule(draw2d.FillRuleEvenOdd)
	gc.SetFillColor(color.NRGBA{0, 0xB2, 0, 0xFF})

	gc.SetStrokeColor(image.Black)
	gc.FillStroke(wheel1, wheel2)

	draw2d.Rect(gc, x, y+sy*140, x+sx*232, y+sy*198)
	wheel1 = new(draw2d.PathStorage)
	wheel1.ArcTo(x+sx*52, y+sy*198, sx*40, sy*40, 0, 2*math.Pi)
	wheel2 = new(draw2d.PathStorage)
	wheel2.ArcTo(x+sx*180, y+sy*198, sx*40, sy*40, 0, -2*math.Pi)

	gc.SetFillRule(draw2d.FillRuleWinding)
	gc.SetFillColor(color.NRGBA{0, 0, 0xE5, 0xFF})
	gc.FillStroke(wheel1, wheel2)
}
Example #28
0
// FillStroke first fills and afterwards strokes a path.
func FillStroke(gc draw2d.GraphicContext, x, y, width, height float64) {
	sx, sy := width/210, height/215
	gc.MoveTo(x+sx*113.0, y)
	gc.LineTo(x+sx*215.0, y+sy*215)
	gc.RLineTo(sx*-100, 0)
	gc.CubicCurveTo(x+sx*35, y+sy*215, x+sx*35, y+sy*113, x+sx*113.0, y+sy*113)
	gc.Close()

	gc.MoveTo(x+sx*50.0, y)
	gc.RLineTo(sx*51.2, sy*51.2)
	gc.RLineTo(sx*-51.2, sy*51.2)
	gc.RLineTo(sx*-51.2, sy*-51.2)
	gc.Close()

	gc.SetLineWidth(width / 20.0)
	gc.SetFillColor(color.NRGBA{0, 0, 0xFF, 0xFF})
	gc.SetStrokeColor(image.Black)
	gc.FillStroke()
}
Example #29
0
// FillString draws a filled and stroked string.
func FillString(gc draw2d.GraphicContext, x, y, width, height float64) {
	sx, sy := width/100, height/100
	gc.Save()
	gc.SetStrokeColor(image.Black)
	gc.SetLineWidth(1)
	draw2d.RoundRect(gc, x+sx*5, y+sy*5, x+sx*95, y+sy*95, sx*10, sy*10)
	gc.FillStroke()
	gc.SetFillColor(image.Black)
	gc.SetFontSize(height / 6)
	gc.Translate(x+sx*6, y+sy*52)
	gc.SetFontData(draw2d.FontData{
		Name:   "luxi",
		Family: draw2d.FontFamilyMono,
		Style:  draw2d.FontStyleBold | draw2d.FontStyleItalic})
	w := gc.FillString("Hug")
	gc.Translate(w+sx, 0)
	left, top, right, bottom := gc.GetStringBounds("cou")
	gc.SetStrokeColor(color.NRGBA{255, 0x33, 0x33, 0x80})
	draw2d.Rect(gc, left, top, right, bottom)
	gc.SetLineWidth(height / 50)
	gc.Stroke()
	gc.SetFillColor(color.NRGBA{0x33, 0x33, 0xff, 0xff})
	gc.SetStrokeColor(color.NRGBA{0x33, 0x33, 0xff, 0xff})
	gc.SetLineWidth(height / 100)
	gc.StrokeString("Hug")
	gc.Restore()
}
Example #30
0
// CubicCurve draws a cubic curve with its control points.
func CubicCurve(gc draw2d.GraphicContext, x, y, width, height float64) {
	sx, sy := width/162, height/205
	x0, y0 := x, y+sy*100.0
	x1, y1 := x+sx*75, y+sy*205
	x2, y2 := x+sx*125, y
	x3, y3 := x+sx*205, y+sy*100

	gc.SetStrokeColor(image.Black)
	gc.SetFillColor(color.NRGBA{0xAA, 0xAA, 0xAA, 0xFF})
	gc.SetLineWidth(width / 10)
	gc.MoveTo(x0, y0)
	gc.CubicCurveTo(x1, y1, x2, y2, x3, y3)
	gc.Stroke()

	gc.SetStrokeColor(color.NRGBA{0xFF, 0x33, 0x33, 0x88})

	gc.SetLineWidth(width / 20)
	// draw segment of curve
	gc.MoveTo(x0, y0)
	gc.LineTo(x1, y1)
	gc.LineTo(x2, y2)
	gc.LineTo(x3, y3)
	gc.Stroke()
}