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add transformation to text and images

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This commit is contained in:
Stani 2015-06-27 20:06:06 +02:00
parent 244893c6ab
commit 4d393c1035
1 changed files with 11 additions and 4 deletions
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15
pdf2d/graphiccontext.go
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@ -79,6 +79,7 @@ func NewGraphicContext(pdf *gofpdf.Fpdf) *GraphicContext {
// DrawImage draws an image as PNG
// TODO: add type (tp) as parameter to argument list?
func (gc *GraphicContext) DrawImage(image image.Image) {
// TODO: fix rotation gc.Current.Tr
name := strconv.Itoa(int(imageCount))
tp := "PNG" // "JPG", "JPEG", "PNG" and "GIF"
b := &bytes.Buffer{}
@ -122,9 +123,13 @@ func (gc *GraphicContext) GetStringBounds(s string) (left, top, right, bottom fl
// CreateStringPath creates a path from the string s at x, y, and returns the string width.
func (gc *GraphicContext) CreateStringPath(text string, x, y float64) (cursor float64) {
gc.pdf.MoveTo(x, y)
// TODO: fix rotation of gc.Current.Tr
_, _, w, h := gc.GetStringBounds(text)
gc.pdf.Cell(w, h, text)
x1, y1 := x+w, y+h
tr := gc.Current.Tr
tr.TransformRectangle(&x, &y, &x1, &y1)
gc.pdf.MoveTo(x, y)
gc.pdf.Cell(x1-x, y1-y, text)
return w
}
@ -138,12 +143,14 @@ func (gc *GraphicContext) FillStringAt(text string, x, y float64) (cursor float6
return gc.CreateStringPath(text, x, y)
}
// StrokeString draws a string at 0, 0
// StrokeString draws a string at 0, 0 (stroking is unsupported,
// string will be filled)
func (gc *GraphicContext) StrokeString(text string) (cursor float64) {
return gc.StrokeStringAt(text, 0, 0)
}
// StrokeStringAt draws a string at x, y
// StrokeStringAt draws a string at x, y (stroking is unsupported,
// string will be filled)
func (gc *GraphicContext) StrokeStringAt(text string, x, y float64) (cursor float64) {
return gc.CreateStringPath(text, x, y)
}