diff options
Diffstat (limited to 'fpdf.go')
| -rw-r--r-- | fpdf.go | 98 |
1 files changed, 57 insertions, 41 deletions
@@ -70,7 +70,7 @@ func fpdfNew(orientationStr, unitStr, sizeStr, fontDirStr string, size SizeType) f.fonts = make(map[string]fontDefType) f.fontFiles = make(map[string]fontFileType) f.diffs = make([]string, 0, 8) - f.images = make(map[string]imageInfoType) + f.images = make(map[string]*ImageInfoType) f.pageLinks = make([][]linkType, 0, 8) f.pageLinks = append(f.pageLinks, make([]linkType, 0, 0)) // pageLinks[0] is unused (1-based) f.links = make([]intLinkType, 0, 8) @@ -1861,39 +1861,11 @@ func (f *Fpdf) Image(fileStr string, x, y, w, h float64, flow bool, tp string, l if f.err != nil { return } - var info imageInfoType - var ok bool - info, ok = f.images[fileStr] - if !ok { - // First use of this image, get info - if tp == "" { - pos := strings.LastIndex(fileStr, ".") - if pos < 0 { - f.err = fmt.Errorf("Image file has no extension and no type was specified: %s", fileStr) - return - } - tp = fileStr[pos+1:] - } - tp = strings.ToLower(tp) - if tp == "jpeg" { - tp = "jpg" - } - switch tp { - case "jpg": - info = f.parsejpg(fileStr) - case "png": - info = f.parsepng(fileStr) - case "gif": - info = f.parsegif(fileStr) - default: - f.err = fmt.Errorf("Unsupported image type: %s", tp) - } - if f.err != nil { - return - } - info.i = len(f.images) + 1 - f.images[fileStr] = info + info := f.RegisterImage(fileStr, tp) + if f.err != nil { + return } + // Automatic width and height calculation if needed if w == 0 && h == 0 { // Put image at 96 dpi @@ -1938,6 +1910,46 @@ func (f *Fpdf) Image(fileStr string, x, y, w, h float64, flow bool, tp string, l return } +// Registers an image, adding it to the PDF file but not adding it to the page. Use +// Image() with the same filename to add the image to the page. Note that Image() +// calls this function, so this function is only necessary if you need information +// about the image. See Image() for restrictions on the image and the "tp" parameters. +func (f *Fpdf) RegisterImage(fileStr, tp string) (info *ImageInfoType) { + info, ok := f.images[fileStr] + if !ok { + // First use of this image, get info + if tp == "" { + pos := strings.LastIndex(fileStr, ".") + if pos < 0 { + f.err = fmt.Errorf("Image file has no extension and no type was specified: %s", fileStr) + return + } + tp = fileStr[pos+1:] + } + tp = strings.ToLower(tp) + if tp == "jpeg" { + tp = "jpg" + } + switch tp { + case "jpg": + info = f.parsejpg(fileStr) + case "png": + info = f.parsepng(fileStr) + case "gif": + info = f.parsegif(fileStr) + default: + f.err = fmt.Errorf("Unsupported image type: %s", tp) + } + if f.err != nil { + return + } + info.i = len(f.images) + 1 + f.images[fileStr] = info + } + + return info +} + // Returns the abscissa of the current position. func (f *Fpdf) GetX() float64 { return f.x @@ -2135,7 +2147,9 @@ func be16(buf []byte) int { // Extract info from a JPEG file // Thank you, Bruno Michel, for providing this code. -func (f *Fpdf) parsejpg(fileStr string) (info imageInfoType) { +func (f *Fpdf) parsejpg(fileStr string) (info *ImageInfoType) { + info = &ImageInfoType{} + var err error info.data, err = ioutil.ReadFile(fileStr) if err != nil { @@ -2164,7 +2178,7 @@ func (f *Fpdf) parsejpg(fileStr string) (info imageInfoType) { } // Extract info from a PNG file -func (f *Fpdf) parsepng(fileStr string) (info imageInfoType) { +func (f *Fpdf) parsepng(fileStr string) (info *ImageInfoType) { buf, err := bufferFromFile(fileStr) if err != nil { f.err = err @@ -2189,7 +2203,9 @@ func (f *Fpdf) readByte(buf *bytes.Buffer) (val byte) { return } -func (f *Fpdf) parsepngstream(buf *bytes.Buffer) (info imageInfoType) { +func (f *Fpdf) parsepngstream(buf *bytes.Buffer) (info *ImageInfoType) { + info = &ImageInfoType{} + // Check signature if string(buf.Next(8)) != "\x89PNG\x0d\x0a\x1a\x0a" { f.err = fmt.Errorf("Not a PNG buffer") @@ -2350,7 +2366,7 @@ func (f *Fpdf) parsepngstream(buf *bytes.Buffer) (info imageInfoType) { } // Extract info from a GIF file (via PNG conversion) -func (f *Fpdf) parsegif(fileStr string) (info imageInfoType) { +func (f *Fpdf) parsegif(fileStr string) (info *ImageInfoType) { data, err := ioutil.ReadFile(fileStr) if err != nil { f.err = err @@ -2631,14 +2647,14 @@ func (f *Fpdf) putfonts() { func (f *Fpdf) putimages() { for fileStr, img := range f.images { - f.putimage(&img) + f.putimage(img) img.data = img.data[0:0] img.smask = img.smask[0:0] f.images[fileStr] = img } } -func (f *Fpdf) putimage(info *imageInfoType) { +func (f *Fpdf) putimage(info *ImageInfoType) { f.newobj() info.n = f.n f.out("<</Type /XObject") @@ -2675,7 +2691,7 @@ func (f *Fpdf) putimage(info *imageInfoType) { f.out("endobj") // Soft mask if len(info.smask) > 0 { - smask := imageInfoType{ + smask := &ImageInfoType{ w: info.w, h: info.h, cs: "DeviceGray", @@ -2684,7 +2700,7 @@ func (f *Fpdf) putimage(info *imageInfoType) { dp: sprintf("/Predictor 15 /Colors 1 /BitsPerComponent 8 /Columns %d", int(info.w)), data: info.smask, } - f.putimage(&smask) + f.putimage(smask) } // Palette if info.cs == "Indexed" { |