func (d *gcsDriver) Open(id string) (driver.RFile, error) {
f, err := file.Open(d.c, d.path(id))
if err != nil {
return nil, err
}
return rfile{f}, nil
}
func renderMeme(ctx appengine.Context, w io.Writer, id, topText, botText string) error {
// Read template.
templateName := templateFile(id)
reader, err := file.Open(ctx, gcsFilesApiPath(bucket, templateName))
if err != nil {
return err
}
defer reader.Close()
bgImg, err := jpeg.Decode(reader)
if err != nil {
return err
}
img := image.NewRGBA(bgImg.Bounds())
draw.Draw(img, bgImg.Bounds(), bgImg, image.ZP, draw.Src)
c := freetype.NewContext()
c.SetDPI(72)
c.SetFont(font)
c.SetClip(img.Bounds())
c.SetDst(img)
c.SetHinting(freetype.FullHinting)
drawFitCentered(c, topText, img, false)
drawFitCentered(c, botText, img, true)
err = jpeg.Encode(w, img, &jpeg.Options{Quality: 75})
if err != nil {
return err
}
return nil
}