diff options
| -rw-r--r-- | fpdf.go | 67 | ||||
| -rw-r--r-- | fpdf_test.go | 23 |
2 files changed, 90 insertions, 0 deletions
@@ -2986,6 +2986,73 @@ func (f *Fpdf) ImageOptions(imageNameStr string, x, y, w, h float64, flow bool, return } +// ImageOptionsReader registers an image, reading it from Reader r, and puts a +// JPEG, PNG or GIF image in the current page. The size it will take on the +// page can be specified in different ways. If both w and h are 0, the image +// is rendered at 96 dpi. If either w or h is zero, it will be calculated from +// the other dimension so that the aspect ratio is maintained. If w and/or h are -1, +// the dpi for that dimension will be read from the ImageInfoType object. PNG +// files can contain dpi information, and if present, this information will be +// populated in the ImageInfoType object and used in Width, Height, and Extent +// calculations. Otherwise, the SetDpi function can be used to change the dpi +// from the default of 72. +// +// If w and h are any other negative value, their absolute values +// indicate their dpi extents. +// +// Supported JPEG formats are 24 bit, 32 bit and gray scale. Supported PNG +// formats are 24 bit, indexed color, and 8 bit indexed gray scale. If a GIF +// image is animated, only the first frame is rendered. Transparency is +// supported. It is possible to put a link on the image. +// +// imageNameStr may be the name of an image as registered with a call to either +// RegisterImageReader() or RegisterImage(). In the first case, the image is +// loaded using an io.Reader. This is generally useful when the image is +// obtained from some other means than as a disk-based file. In the second +// case, the image is loaded as a file. Alternatively, imageNameStr may +// directly specify a sufficiently qualified filename. +// +// r is an io.Reader that implements the Read() function +// +// However the image is loaded, if it is used more than once only one copy is +// embedded in the file. +// +// If x is negative, the current abscissa is used. +// +// If flow is true, the current y value is advanced after placing the image and +// a page break may be made if necessary. +// +// If link refers to an internal page anchor (that is, it is non-zero; see +// AddLink()), the image will be a clickable internal link. Otherwise, if +// linkStr specifies a URL, the image will be a clickable external link. +func (f *Fpdf) ImageOptionsReader(imageNameStr string, r io.Reader, x, y, w, h float64, flow bool, options ImageOptions, link int, linkStr string) { + if f.err != nil { + return + } + + var info *ImageInfoType + + i, ok := f.images[imageNameStr] + if ok { + info = i + } else { + if options.ImageType == "" { + pos := strings.LastIndex(imageNameStr, ".") + if pos < 0 { + f.err = fmt.Errorf("image file has no extension and no type was specified: %s", imageNameStr) + return + } + options.ImageType = imageNameStr[pos+1:] + } + info = f.RegisterImageOptionsReader(imageNameStr, options, r) + if f.err != nil { + return + } + } + f.imageOut(info, x, y, w, h, options.AllowNegativePosition, flow, link, linkStr) + return +} + // RegisterImageReader registers an image, reading it from Reader r, adding it // to the PDF file but not adding it to the page. // diff --git a/fpdf_test.go b/fpdf_test.go index 7ee0831..5ef88aa 100644 --- a/fpdf_test.go +++ b/fpdf_test.go @@ -858,6 +858,29 @@ func ExampleFpdf_ImageOptions() { // Successfully generated pdf/Fpdf_ImageOptions.pdf } +// ImageOption struct can be used to affect horizontal image placement. +func ExampleFpdf_ImageOptionsReader() { + var opt gofpdf.ImageOptions + + pdf := gofpdf.New("P", "mm", "A4", "") + pdf.AddPage() + pdf.SetFont("Arial", "", 11) + pdf.SetX(60) + opt.ImageType = "png" + bytes, err := ioutil.ReadAll(example.ImageFile("logo.png")) + if err!=nil{ + t.Fatal(err) + } + pdf.ImageOptionsReader(example.ImageFile("logo.png"), bytes.NewReader(bytes),-10, 10, 30, 0, false, opt, 0, "") + opt.AllowNegativePosition = true + pdf.ImageOptionsReader(example.ImageFile("logo.png"),bytes.NewReader(bytes), -10, 50, 30, 0, false, opt, 0, "") + fileStr := example.Filename("Fpdf_ImageOptionsReader") + err := pdf.OutputFileAndClose(fileStr) + example.Summary(err, fileStr) + // Output: + // Successfully generated pdf/Fpdf_ImageOptionsReader.pdf +} + // This examples demonstrates Landscape mode with images. func ExampleFpdf_SetAcceptPageBreakFunc() { var y0 float64 |