draw2d/pdf2d/samples/frame-image/frame-image.go
2015-06-29 01:29:04 +02:00

49 lines
1.2 KiB
Go

// Copyright 2010 The draw2d Authors. All rights reserved.
// created: 21/11/2010 by Laurent Le Goff, Stani Michiels
// Load a png image and rotate it
package main
import (
"math"
"github.com/stanim/draw2d"
"github.com/stanim/draw2d/pdf2d"
)
func main() {
// Margin between the image and the frame
const margin = 30
// Line width od the frame
const lineWidth = 3
// Initialize the graphic context on a pdf document
dest := pdf2d.NewPdf("P", "mm", "A3")
gc := pdf2d.NewGraphicContext(dest)
// Size of destination image
dw, dh := dest.GetPageSize()
// Draw frame
draw2d.RoundRect(gc, lineWidth, lineWidth, dw-lineWidth, dh-lineWidth, 100, 100)
gc.SetLineWidth(lineWidth)
gc.FillStroke()
// load the source image
source, err := draw2d.LoadFromPngFile("gopher.png")
if err != nil {
panic(err)
}
// Size of source image
sw, sh := float64(source.Bounds().Dx()), float64(source.Bounds().Dy())
// Draw image to fit in the frame
// TODO Seems to have a transform bug here on draw image
scale := math.Min((dw-margin*2)/sw, (dh-margin*2)/sh)
gc.Save()
gc.Translate(margin, margin)
gc.Scale(scale, scale)
gc.DrawImage(source)
gc.Restore()
// Save to pdf
pdf2d.SaveToPdfFile("frame-image.pdf", dest)
}