Kurt Jungs Auslieferungszustand

contrib/tiff/tiff.go

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+/*
+ * Copyright (c) 2016 Kurt Jung (Gmail: kurt.w.jung)
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+// Package tiff allows standard (LZW-compressed) TIFF images to be used in
+// documents generated with gofpdf.
+package tiff
+
+import (
+	"bytes"
+	"fmt"
+	"image"
+	"image/png"
+	"io"
+	"os"
+
+	"github.com/jung-kurt/gofpdf"
+	"golang.org/x/image/tiff"
+)
+
+// RegisterReader registers a TIFF image, adding it to the PDF file but not
+// adding it to the page. imgName specifies the name that will be used in the
+// call to Image() that actually places the image in the document. options
+// specifies various image properties; in this case, the ImageType property
+// should be set to "tiff". The TIFF image is a reader from the reader
+// specified by r.
+func RegisterReader(fpdf *gofpdf.Fpdf, imgName string, options gofpdf.ImageOptions, r io.Reader) (info *gofpdf.ImageInfoType) {
+	var err error
+	var img image.Image
+	var buf bytes.Buffer
+	if fpdf.Ok() {
+		if options.ImageType == "tiff" || options.ImageType == "tif" {
+			img, err = tiff.Decode(r)
+			if err == nil {
+				err = png.Encode(&buf, img)
+				if err == nil {
+					options.ImageType = "png"
+					info = fpdf.RegisterImageOptionsReader(imgName, options, &buf)
+				}
+			}
+		} else {
+			err = fmt.Errorf("expecting \"tiff\" or \"tif\" as image type, got \"%s\"", options.ImageType)
+		}
+		if err != nil {
+			fpdf.SetError(err)
+		}
+	}
+	return
+}
+
+// RegisterFile registers a TIFF image, adding it to the PDF file but not
+// adding it to the page. imgName specifies the name that will be used in the
+// call to Image() that actually places the image in the document. options
+// specifies various image properties; in this case, the ImageType property
+// should be set to "tiff". The TIFF image is read from the file specified by
+// tiffFileStr.
+func RegisterFile(fpdf *gofpdf.Fpdf, imgName string, options gofpdf.ImageOptions, tiffFileStr string) (info *gofpdf.ImageInfoType) {
+	var f *os.File
+	var err error
+
+	if fpdf.Ok() {
+		f, err = os.Open(tiffFileStr)
+		if err == nil {
+			info = RegisterReader(fpdf, imgName, options, f)
+			f.Close()
+		} else {
+			fpdf.SetError(err)
+		}
+	}
+	return
+}

contrib/tiff/tiff_test.go

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+package tiff_test
+
+import (
+	"github.com/jung-kurt/gofpdf"
+	"github.com/jung-kurt/gofpdf/contrib/tiff"
+	"github.com/jung-kurt/gofpdf/internal/example"
+)
+
+// ExampleRegisterFile demonstrates the loading and display of a TIFF image.
+func ExampleRegisterFile() {
+	pdf := gofpdf.New("L", "mm", "A4", "")
+	pdf.SetFont("Helvetica", "", 12)
+	pdf.SetFillColor(200, 200, 220)
+	pdf.AddPageFormat("L", gofpdf.SizeType{Wd: 200, Ht: 200})
+	opt := gofpdf.ImageOptions{ImageType: "tiff", ReadDpi: false}
+	_ = tiff.RegisterFile(pdf, "sample", opt, "../../image/golang-gopher.tiff")
+	pdf.Image("sample", 0, 0, 200, 200, false, "", 0, "")
+	fileStr := example.Filename("Fpdf_Contrib_Tiff")
+	err := pdf.OutputFileAndClose(fileStr)
+	example.Summary(err, fileStr)
+	// Output:
+	// Successfully generated ../../pdf/Fpdf_Contrib_Tiff.pdf
+}