// Main draws geometry and returns the filename. This should only be
// used during testing.
func Main(gc draw2d.GraphicContext, ext string) (string, error) {
// Draw the droid
Draw(gc, 297, 210)
// Return the output filename
return samples.Output("geometry", ext), nil
}
// 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
}
// 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
}
// Main draws a rotated face of the gopher. Afterwards it returns
// the filename. This should only be used during testing.
func Main(gc draw2d.GraphicContext, ext string) (string, error) {
gc.SetStrokeColor(image.Black)
gc.SetFillColor(image.White)
gc.Save()
// Draw a (partial) gopher
gc.Translate(-60, 65)
gc.Rotate(-30 * (math.Pi / 180.0))
Draw(gc, 48, 48, 240, 72)
gc.Restore()
// Return the output filename
return samples.Output("gopher2", ext), nil
}
// Main draws the different line caps and joins.
// This should only be used during testing.
func Main(gc draw2d.GraphicContext, ext string) (string, error) {
// Draw the line
const offset = 75.0
x := 35.0
caps := []draw2d.LineCap{draw2d.ButtCap, draw2d.SquareCap, draw2d.RoundCap}
joins := []draw2d.LineJoin{draw2d.BevelJoin, draw2d.MiterJoin, draw2d.RoundJoin}
for i := range caps {
Draw(gc, caps[i], joins[i], x, 50, x, 160, offset)
x += offset
}
// Return the output filename
return samples.Output("linecapjoin", ext), nil
}
// Main draws the image frame and returns the filename.
// This should only be used during testing.
func Main(gc draw2d.GraphicContext, ext string) (string, error) {
// Margin between the image and the frame
const margin = 30
// Line width od the frame
const lineWidth = 3
// Gopher image
gopher := samples.Resource("image", "gopher.png", ext)
// Draw gopher
err := Draw(gc, gopher, 297, 210, margin, lineWidth)
// Return the output filename
return samples.Output("frameimage", ext), err
}
// 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)
draw2dkit.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
}
// 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
}