forked from jung-kurt/gofpdf
/
fpdf_test.go
1859 lines (1749 loc) · 54.4 KB
/
fpdf_test.go
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/*
* Copyright (c) 2013-2015 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 gofpdf_test
import (
"bufio"
"bytes"
"fmt"
"io"
"io/ioutil"
"math"
"net/http"
"os"
"path/filepath"
"strconv"
"strings"
"github.com/jung-kurt/gofpdf"
"github.com/jung-kurt/gofpdf/internal/example"
"github.com/jung-kurt/gofpdf/internal/files"
)
func init() {
cleanup()
}
func cleanup() {
filepath.Walk(example.PdfDir(),
func(path string, info os.FileInfo, err error) (reterr error) {
if info.Mode().IsRegular() {
dir, _ := filepath.Split(path)
if "reference" != filepath.Base(dir) {
if len(path) > 3 {
if path[len(path)-4:] == ".pdf" {
os.Remove(path)
}
}
}
}
return
})
}
type fontResourceType struct {
}
func (f fontResourceType) Open(name string) (rdr io.Reader, err error) {
var buf []byte
buf, err = ioutil.ReadFile(example.FontFile(name))
if err == nil {
rdr = bytes.NewReader(buf)
fmt.Printf("Generalized font loader reading %s\n", name)
}
return
}
// Convert 'ABCDEFG' to, for example, 'A,BCD,EFG'
func strDelimit(str string, sepstr string, sepcount int) string {
pos := len(str) - sepcount
for pos > 0 {
str = str[:pos] + sepstr + str[pos:]
pos = pos - sepcount
}
return str
}
func lorem() string {
return "Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod " +
"tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis " +
"nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis " +
"aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat " +
"nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui " +
"officia deserunt mollit anim id est laborum."
}
// This example demonstrates the generation of a simple PDF document. Note that
// since only core fonts are used (in this case Arial, a synonym for
// Helvetica), an empty string can be specified for the font directory in the
// call to New(). Note also that the example.Filename() and example.Summary()
// functions belong to a separate, internal package and are not part of the
// gofpdf library. If an error occurs at some point during the construction of
// the document, subsequent method calls exit immediately and the error is
// finally retrieved with the output call where it can be handled by the
// application.
func Example() {
pdf := gofpdf.New("P", "mm", "A4", "")
pdf.AddPage()
pdf.SetFont("Arial", "B", 16)
pdf.Cell(40, 10, "Hello World!")
fileStr := example.Filename("basic")
err := pdf.OutputFileAndClose(fileStr)
example.Summary(err, fileStr)
// Output:
// Successfully generated pdf/basic.pdf
}
// This example demonsrates the generation of headers, footers and page breaks.
func ExampleFpdf_AddPage() {
pdf := gofpdf.New("P", "mm", "A4", "")
pdf.SetHeaderFunc(func() {
pdf.Image(example.ImageFile("logo.png"), 10, 6, 30, 0, false, "", 0, "")
pdf.SetY(5)
pdf.SetFont("Arial", "B", 15)
pdf.Cell(80, 0, "")
pdf.CellFormat(30, 10, "Title", "1", 0, "C", false, 0, "")
pdf.Ln(20)
})
pdf.SetFooterFunc(func() {
pdf.SetY(-15)
pdf.SetFont("Arial", "I", 8)
pdf.CellFormat(0, 10, fmt.Sprintf("Page %d/{nb}", pdf.PageNo()),
"", 0, "C", false, 0, "")
})
pdf.AliasNbPages("")
pdf.AddPage()
pdf.SetFont("Times", "", 12)
for j := 1; j <= 40; j++ {
pdf.CellFormat(0, 10, fmt.Sprintf("Printing line number %d", j),
"", 1, "", false, 0, "")
}
fileStr := example.Filename("Fpdf_AddPage")
err := pdf.OutputFileAndClose(fileStr)
example.Summary(err, fileStr)
// Output:
// Successfully generated pdf/Fpdf_AddPage.pdf
}
// This example demonstrates word-wrapping, line justification and
// page-breaking.
func ExampleFpdf_MultiCell() {
pdf := gofpdf.New("P", "mm", "A4", "")
titleStr := "20000 Leagues Under the Seas"
pdf.SetTitle(titleStr, false)
pdf.SetAuthor("Jules Verne", false)
pdf.SetHeaderFunc(func() {
// Arial bold 15
pdf.SetFont("Arial", "B", 15)
// Calculate width of title and position
wd := pdf.GetStringWidth(titleStr) + 6
pdf.SetX((210 - wd) / 2)
// Colors of frame, background and text
pdf.SetDrawColor(0, 80, 180)
pdf.SetFillColor(230, 230, 0)
pdf.SetTextColor(220, 50, 50)
// Thickness of frame (1 mm)
pdf.SetLineWidth(1)
// Title
pdf.CellFormat(wd, 9, titleStr, "1", 1, "C", true, 0, "")
// Line break
pdf.Ln(10)
})
pdf.SetFooterFunc(func() {
// Position at 1.5 cm from bottom
pdf.SetY(-15)
// Arial italic 8
pdf.SetFont("Arial", "I", 8)
// Text color in gray
pdf.SetTextColor(128, 128, 128)
// Page number
pdf.CellFormat(0, 10, fmt.Sprintf("Page %d", pdf.PageNo()),
"", 0, "C", false, 0, "")
})
chapterTitle := func(chapNum int, titleStr string) {
// // Arial 12
pdf.SetFont("Arial", "", 12)
// Background color
pdf.SetFillColor(200, 220, 255)
// Title
pdf.CellFormat(0, 6, fmt.Sprintf("Chapter %d : %s", chapNum, titleStr),
"", 1, "L", true, 0, "")
// Line break
pdf.Ln(4)
}
chapterBody := func(fileStr string) {
// Read text file
txtStr, err := ioutil.ReadFile(fileStr)
if err != nil {
pdf.SetError(err)
}
// Times 12
pdf.SetFont("Times", "", 12)
// Output justified text
pdf.MultiCell(0, 5, string(txtStr), "", "", false)
// Line break
pdf.Ln(-1)
// Mention in italics
pdf.SetFont("", "I", 0)
pdf.Cell(0, 5, "(end of excerpt)")
}
printChapter := func(chapNum int, titleStr, fileStr string) {
pdf.AddPage()
chapterTitle(chapNum, titleStr)
chapterBody(fileStr)
}
printChapter(1, "A RUNAWAY REEF", example.TextFile("20k_c1.txt"))
printChapter(2, "THE PROS AND CONS", example.TextFile("20k_c2.txt"))
fileStr := example.Filename("Fpdf_MultiCell")
err := pdf.OutputFileAndClose(fileStr)
example.Summary(err, fileStr)
// Output:
// Successfully generated pdf/Fpdf_MultiCell.pdf
}
// This example demonstrates the generation of a PDF document that has multiple
// columns. This is accomplished with the SetLeftMargin() and Cell() methods.
func ExampleFpdf_SetLeftMargin() {
var y0 float64
var crrntCol int
pdf := gofpdf.New("P", "mm", "A4", "")
pdf.SetDisplayMode("fullpage", "TwoColumnLeft")
titleStr := "20000 Leagues Under the Seas"
pdf.SetTitle(titleStr, false)
pdf.SetAuthor("Jules Verne", false)
setCol := func(col int) {
// Set position at a given column
crrntCol = col
x := 10.0 + float64(col)*65.0
pdf.SetLeftMargin(x)
pdf.SetX(x)
}
chapterTitle := func(chapNum int, titleStr string) {
// Arial 12
pdf.SetFont("Arial", "", 12)
// Background color
pdf.SetFillColor(200, 220, 255)
// Title
pdf.CellFormat(0, 6, fmt.Sprintf("Chapter %d : %s", chapNum, titleStr),
"", 1, "L", true, 0, "")
// Line break
pdf.Ln(4)
y0 = pdf.GetY()
}
chapterBody := func(fileStr string) {
// Read text file
txtStr, err := ioutil.ReadFile(fileStr)
if err != nil {
pdf.SetError(err)
}
// Font
pdf.SetFont("Times", "", 12)
// Output text in a 6 cm width column
pdf.MultiCell(60, 5, string(txtStr), "", "", false)
pdf.Ln(-1)
// Mention
pdf.SetFont("", "I", 0)
pdf.Cell(0, 5, "(end of excerpt)")
// Go back to first column
setCol(0)
}
printChapter := func(num int, titleStr, fileStr string) {
// Add chapter
pdf.AddPage()
chapterTitle(num, titleStr)
chapterBody(fileStr)
}
pdf.SetAcceptPageBreakFunc(func() bool {
// Method accepting or not automatic page break
if crrntCol < 2 {
// Go to next column
setCol(crrntCol + 1)
// Set ordinate to top
pdf.SetY(y0)
// Keep on page
return false
}
// Go back to first column
setCol(0)
// Page break
return true
})
pdf.SetHeaderFunc(func() {
// Arial bold 15
pdf.SetFont("Arial", "B", 15)
// Calculate width of title and position
wd := pdf.GetStringWidth(titleStr) + 6
pdf.SetX((210 - wd) / 2)
// Colors of frame, background and text
pdf.SetDrawColor(0, 80, 180)
pdf.SetFillColor(230, 230, 0)
pdf.SetTextColor(220, 50, 50)
// Thickness of frame (1 mm)
pdf.SetLineWidth(1)
// Title
pdf.CellFormat(wd, 9, titleStr, "1", 1, "C", true, 0, "")
// Line break
pdf.Ln(10)
// Save ordinate
y0 = pdf.GetY()
})
pdf.SetFooterFunc(func() {
// Position at 1.5 cm from bottom
pdf.SetY(-15)
// Arial italic 8
pdf.SetFont("Arial", "I", 8)
// Text color in gray
pdf.SetTextColor(128, 128, 128)
// Page number
pdf.CellFormat(0, 10, fmt.Sprintf("Page %d", pdf.PageNo()),
"", 0, "C", false, 0, "")
})
printChapter(1, "A RUNAWAY REEF", example.TextFile("20k_c1.txt"))
printChapter(2, "THE PROS AND CONS", example.TextFile("20k_c2.txt"))
fileStr := example.Filename("Fpdf_SetLeftMargin_multicolumn")
err := pdf.OutputFileAndClose(fileStr)
example.Summary(err, fileStr)
// Output:
// Successfully generated pdf/Fpdf_SetLeftMargin_multicolumn.pdf
}
// This example demonstrates various table styles.
func ExampleFpdf_CellFormat_tables() {
pdf := gofpdf.New("P", "mm", "A4", "")
type countryType struct {
nameStr, capitalStr, areaStr, popStr string
}
countryList := make([]countryType, 0, 8)
header := []string{"Country", "Capital", "Area (sq km)", "Pop. (thousands)"}
loadData := func(fileStr string) {
fl, err := os.Open(fileStr)
if err == nil {
scanner := bufio.NewScanner(fl)
var c countryType
for scanner.Scan() {
// Austria;Vienna;83859;8075
lineStr := scanner.Text()
list := strings.Split(lineStr, ";")
if len(list) == 4 {
c.nameStr = list[0]
c.capitalStr = list[1]
c.areaStr = list[2]
c.popStr = list[3]
countryList = append(countryList, c)
} else {
err = fmt.Errorf("error tokenizing %s", lineStr)
}
}
fl.Close()
if len(countryList) == 0 {
err = fmt.Errorf("error loading data from %s", fileStr)
}
}
if err != nil {
pdf.SetError(err)
}
}
// Simple table
basicTable := func() {
for _, str := range header {
pdf.CellFormat(40, 7, str, "1", 0, "", false, 0, "")
}
pdf.Ln(-1)
for _, c := range countryList {
pdf.CellFormat(40, 6, c.nameStr, "1", 0, "", false, 0, "")
pdf.CellFormat(40, 6, c.capitalStr, "1", 0, "", false, 0, "")
pdf.CellFormat(40, 6, c.areaStr, "1", 0, "", false, 0, "")
pdf.CellFormat(40, 6, c.popStr, "1", 0, "", false, 0, "")
pdf.Ln(-1)
}
}
// Better table
improvedTable := func() {
// Column widths
w := []float64{40.0, 35.0, 40.0, 45.0}
wSum := 0.0
for _, v := range w {
wSum += v
}
// Header
for j, str := range header {
pdf.CellFormat(w[j], 7, str, "1", 0, "C", false, 0, "")
}
pdf.Ln(-1)
// Data
for _, c := range countryList {
pdf.CellFormat(w[0], 6, c.nameStr, "LR", 0, "", false, 0, "")
pdf.CellFormat(w[1], 6, c.capitalStr, "LR", 0, "", false, 0, "")
pdf.CellFormat(w[2], 6, strDelimit(c.areaStr, ",", 3),
"LR", 0, "R", false, 0, "")
pdf.CellFormat(w[3], 6, strDelimit(c.popStr, ",", 3),
"LR", 0, "R", false, 0, "")
pdf.Ln(-1)
}
pdf.CellFormat(wSum, 0, "", "T", 0, "", false, 0, "")
}
// Colored table
fancyTable := func() {
// Colors, line width and bold font
pdf.SetFillColor(255, 0, 0)
pdf.SetTextColor(255, 255, 255)
pdf.SetDrawColor(128, 0, 0)
pdf.SetLineWidth(.3)
pdf.SetFont("", "B", 0)
// Header
w := []float64{40, 35, 40, 45}
wSum := 0.0
for _, v := range w {
wSum += v
}
for j, str := range header {
pdf.CellFormat(w[j], 7, str, "1", 0, "C", true, 0, "")
}
pdf.Ln(-1)
// Color and font restoration
pdf.SetFillColor(224, 235, 255)
pdf.SetTextColor(0, 0, 0)
pdf.SetFont("", "", 0)
// Data
fill := false
for _, c := range countryList {
pdf.CellFormat(w[0], 6, c.nameStr, "LR", 0, "", fill, 0, "")
pdf.CellFormat(w[1], 6, c.capitalStr, "LR", 0, "", fill, 0, "")
pdf.CellFormat(w[2], 6, strDelimit(c.areaStr, ",", 3),
"LR", 0, "R", fill, 0, "")
pdf.CellFormat(w[3], 6, strDelimit(c.popStr, ",", 3),
"LR", 0, "R", fill, 0, "")
pdf.Ln(-1)
fill = !fill
}
pdf.CellFormat(wSum, 0, "", "T", 0, "", false, 0, "")
}
loadData(example.TextFile("countries.txt"))
pdf.SetFont("Arial", "", 14)
pdf.AddPage()
basicTable()
pdf.AddPage()
improvedTable()
pdf.AddPage()
fancyTable()
fileStr := example.Filename("Fpdf_CellFormat_tables")
err := pdf.OutputFileAndClose(fileStr)
example.Summary(err, fileStr)
// Output:
// Successfully generated pdf/Fpdf_CellFormat_tables.pdf
}
// This example demonstrates internal and external links with and without basic
// HTML.
func ExampleFpdf_HTMLBasicNew() {
pdf := gofpdf.New("P", "mm", "A4", "")
// First page: manual local link
pdf.AddPage()
pdf.SetFont("Helvetica", "", 20)
_, lineHt := pdf.GetFontSize()
pdf.Write(lineHt, "To find out what's new in this tutorial, click ")
pdf.SetFont("", "U", 0)
link := pdf.AddLink()
pdf.WriteLinkID(lineHt, "here", link)
pdf.SetFont("", "", 0)
// Second page: image link and basic HTML with link
pdf.AddPage()
pdf.SetLink(link, 0, -1)
pdf.Image(example.ImageFile("logo.png"), 10, 12, 30, 0, false, "", 0, "http://www.fpdf.org")
pdf.SetLeftMargin(45)
pdf.SetFontSize(14)
_, lineHt = pdf.GetFontSize()
htmlStr := `You can now easily print text mixing different styles: <b>bold</b>, ` +
`<i>italic</i>, <u>underlined</u>, or <b><i><u>all at once</u></i></b>!<br><br>` +
`<center>You can also center text.</center>` +
`<right>Or align it to the right.</right>` +
`You can also insert links on text, such as ` +
`<a href="http://www.fpdf.org">www.fpdf.org</a>, or on an image: click on the logo.`
html := pdf.HTMLBasicNew()
html.Write(lineHt, htmlStr)
fileStr := example.Filename("Fpdf_HTMLBasicNew")
err := pdf.OutputFileAndClose(fileStr)
example.Summary(err, fileStr)
// Output:
// Successfully generated pdf/Fpdf_HTMLBasicNew.pdf
}
// This example demonstrates the use of a non-standard font.
func ExampleFpdf_AddFont() {
pdf := gofpdf.New("P", "mm", "A4", example.FontDir())
pdf.AddFont("Calligrapher", "", "calligra.json")
pdf.AddPage()
pdf.SetFont("Calligrapher", "", 35)
pdf.Cell(0, 10, "Enjoy new fonts with FPDF!")
fileStr := example.Filename("Fpdf_AddFont")
err := pdf.OutputFileAndClose(fileStr)
example.Summary(err, fileStr)
// Output:
// Successfully generated pdf/Fpdf_AddFont.pdf
}
// This example demonstrates how to align text with the Write function.
func ExampleFpdf_WriteAligned() {
pdf := gofpdf.New("P", "mm", "A4", example.FontDir())
pdf.AddPage()
pdf.SetFont("Helvetica", "", 12)
pdf.WriteAligned(0, 35, "This text is the default alignment, Left", "")
pdf.Ln(35)
pdf.WriteAligned(0, 35, "This text is aligned Left", "L")
pdf.Ln(35)
pdf.WriteAligned(0, 35, "This text is aligned Center", "C")
pdf.Ln(35)
pdf.WriteAligned(0, 35, "This text is aligned Right", "R")
fileStr := example.Filename("Fpdf_WriteAligned")
err := pdf.OutputFileAndClose(fileStr)
example.Summary(err, fileStr)
// Output:
// Successfully generated pdf/Fpdf_WriteAligned.pdf
}
// This example demonstrates how images are included in documents.
func ExampleFpdf_Image() {
pdf := gofpdf.New("P", "mm", "A4", "")
pdf.AddPage()
pdf.SetFont("Arial", "", 11)
pdf.Image(example.ImageFile("logo.png"), 10, 10, 30, 0, false, "", 0, "")
pdf.Text(50, 20, "logo.png")
pdf.Image(example.ImageFile("logo.gif"), 10, 40, 30, 0, false, "", 0, "")
pdf.Text(50, 50, "logo.gif")
pdf.Image(example.ImageFile("logo-gray.png"), 10, 70, 30, 0, false, "", 0, "")
pdf.Text(50, 80, "logo-gray.png")
pdf.Image(example.ImageFile("logo-rgb.png"), 10, 100, 30, 0, false, "", 0, "")
pdf.Text(50, 110, "logo-rgb.png")
pdf.Image(example.ImageFile("logo.jpg"), 10, 130, 30, 0, false, "", 0, "")
pdf.Text(50, 140, "logo.jpg")
fileStr := example.Filename("Fpdf_Image")
err := pdf.OutputFileAndClose(fileStr)
example.Summary(err, fileStr)
// Output:
// Successfully generated pdf/Fpdf_Image.pdf
}
// This examples demonstrates Landscape mode with images.
func ExampleFpdf_SetAcceptPageBreakFunc() {
var y0 float64
var crrntCol int
loremStr := lorem()
pdf := gofpdf.New("L", "mm", "A4", "")
const (
pageWd = 297.0 // A4 210.0 x 297.0
margin = 10.0
gutter = 4
colNum = 3
colWd = (pageWd - 2*margin - (colNum-1)*gutter) / colNum
)
setCol := func(col int) {
crrntCol = col
x := margin + float64(col)*(colWd+gutter)
pdf.SetLeftMargin(x)
pdf.SetX(x)
}
pdf.SetHeaderFunc(func() {
titleStr := "gofpdf"
pdf.SetFont("Helvetica", "B", 48)
wd := pdf.GetStringWidth(titleStr) + 6
pdf.SetX((pageWd - wd) / 2)
pdf.SetTextColor(128, 128, 160)
pdf.Write(12, titleStr[:2])
pdf.SetTextColor(128, 128, 128)
pdf.Write(12, titleStr[2:])
pdf.Ln(20)
y0 = pdf.GetY()
})
pdf.SetAcceptPageBreakFunc(func() bool {
if crrntCol < colNum-1 {
setCol(crrntCol + 1)
pdf.SetY(y0)
// Start new column, not new page
return false
}
setCol(0)
return true
})
pdf.AddPage()
pdf.SetFont("Times", "", 12)
for j := 0; j < 20; j++ {
if j == 1 {
pdf.Image(example.ImageFile("fpdf.png"), -1, 0, colWd, 0, true, "", 0, "")
} else if j == 5 {
pdf.Image(example.ImageFile("golang-gopher.png"),
-1, 0, colWd, 0, true, "", 0, "")
}
pdf.MultiCell(colWd, 5, loremStr, "", "", false)
pdf.Ln(-1)
}
fileStr := example.Filename("Fpdf_SetAcceptPageBreakFunc_landscape")
err := pdf.OutputFileAndClose(fileStr)
example.Summary(err, fileStr)
// Output:
// Successfully generated pdf/Fpdf_SetAcceptPageBreakFunc_landscape.pdf
}
// This examples tests corner cases as reported by the gocov tool.
func ExampleFpdf_SetKeywords() {
var err error
fileStr := example.Filename("Fpdf_SetKeywords")
err = gofpdf.MakeFont(example.FontFile("CalligrapherRegular.pfb"),
example.FontFile("cp1252.map"), example.FontDir(), nil, true)
if err == nil {
pdf := gofpdf.New("", "", "", "")
pdf.SetFontLocation(example.FontDir())
pdf.SetTitle("世界", true)
pdf.SetAuthor("世界", true)
pdf.SetSubject("世界", true)
pdf.SetCreator("世界", true)
pdf.SetKeywords("世界", true)
pdf.AddFont("Calligrapher", "", "CalligrapherRegular.json")
pdf.AddPage()
pdf.SetFont("Calligrapher", "", 16)
pdf.Writef(5, "\x95 %s \x95", pdf)
err = pdf.OutputFileAndClose(fileStr)
}
example.Summary(err, fileStr)
// Output:
// Successfully generated pdf/Fpdf_SetKeywords.pdf
}
// This example demonstrates the construction of various geometric figures,
func ExampleFpdf_Circle() {
const (
thin = 0.2
thick = 3.0
)
pdf := gofpdf.New("", "", "", "")
pdf.SetFont("Helvetica", "", 12)
pdf.SetFillColor(200, 200, 220)
pdf.AddPage()
y := 15.0
pdf.Text(10, y, "Circles")
pdf.SetFillColor(200, 200, 220)
pdf.SetLineWidth(thin)
pdf.Circle(20, y+15, 10, "D")
pdf.Circle(45, y+15, 10, "F")
pdf.Circle(70, y+15, 10, "FD")
pdf.SetLineWidth(thick)
pdf.Circle(95, y+15, 10, "FD")
pdf.SetLineWidth(thin)
y += 40.0
pdf.Text(10, y, "Ellipses")
pdf.SetFillColor(220, 200, 200)
pdf.Ellipse(30, y+15, 20, 10, 0, "D")
pdf.Ellipse(75, y+15, 20, 10, 0, "F")
pdf.Ellipse(120, y+15, 20, 10, 0, "FD")
pdf.SetLineWidth(thick)
pdf.Ellipse(165, y+15, 20, 10, 0, "FD")
pdf.SetLineWidth(thin)
y += 40.0
pdf.Text(10, y, "Curves (quadratic)")
pdf.SetFillColor(220, 220, 200)
pdf.Curve(10, y+30, 15, y-20, 40, y+30, "D")
pdf.Curve(45, y+30, 50, y-20, 75, y+30, "F")
pdf.Curve(80, y+30, 85, y-20, 110, y+30, "FD")
pdf.SetLineWidth(thick)
pdf.Curve(115, y+30, 120, y-20, 145, y+30, "FD")
pdf.SetLineCapStyle("round")
pdf.Curve(150, y+30, 155, y-20, 180, y+30, "FD")
pdf.SetLineWidth(thin)
pdf.SetLineCapStyle("butt")
y += 40.0
pdf.Text(10, y, "Curves (cubic)")
pdf.SetFillColor(220, 200, 220)
pdf.CurveBezierCubic(10, y+30, 15, y-20, 10, y+30, 40, y+30, "D")
pdf.CurveBezierCubic(45, y+30, 50, y-20, 45, y+30, 75, y+30, "F")
pdf.CurveBezierCubic(80, y+30, 85, y-20, 80, y+30, 110, y+30, "FD")
pdf.SetLineWidth(thick)
pdf.CurveBezierCubic(115, y+30, 120, y-20, 115, y+30, 145, y+30, "FD")
pdf.SetLineCapStyle("round")
pdf.CurveBezierCubic(150, y+30, 155, y-20, 150, y+30, 180, y+30, "FD")
pdf.SetLineWidth(thin)
pdf.SetLineCapStyle("butt")
y += 40.0
pdf.Text(10, y, "Arcs")
pdf.SetFillColor(200, 220, 220)
pdf.SetLineWidth(thick)
pdf.Arc(45, y+35, 20, 10, 0, 0, 180, "FD")
pdf.SetLineWidth(thin)
pdf.Arc(45, y+35, 25, 15, 0, 90, 270, "D")
pdf.SetLineWidth(thick)
pdf.Arc(45, y+35, 30, 20, 0, 0, 360, "D")
pdf.SetLineCapStyle("round")
pdf.Arc(135, y+35, 20, 10, 135, 0, 180, "FD")
pdf.SetLineWidth(thin)
pdf.Arc(135, y+35, 25, 15, 135, 90, 270, "D")
pdf.SetLineWidth(thick)
pdf.Arc(135, y+35, 30, 20, 135, 0, 360, "D")
pdf.SetLineWidth(thin)
pdf.SetLineCapStyle("butt")
fileStr := example.Filename("Fpdf_Circle_figures")
err := pdf.OutputFileAndClose(fileStr)
example.Summary(err, fileStr)
// Output:
// Successfully generated pdf/Fpdf_Circle_figures.pdf
}
// This example demonstrates alpha transparency.
func ExampleFpdf_SetAlpha() {
const (
gapX = 10.0
gapY = 9.0
rectW = 40.0
rectH = 58.0
pageW = 210
pageH = 297
)
modeList := []string{"Normal", "Multiply", "Screen", "Overlay",
"Darken", "Lighten", "ColorDodge", "ColorBurn", "HardLight", "SoftLight",
"Difference", "Exclusion", "Hue", "Saturation", "Color", "Luminosity"}
pdf := gofpdf.New("", "", "", "")
pdf.SetLineWidth(2)
pdf.SetAutoPageBreak(false, 0)
pdf.AddPage()
pdf.SetFont("Helvetica", "", 18)
pdf.SetXY(0, gapY)
pdf.SetTextColor(0, 0, 0)
pdf.CellFormat(pageW, gapY, "Alpha Blending Modes", "", 0, "C", false, 0, "")
j := 0
y := 3 * gapY
for col := 0; col < 4; col++ {
x := gapX
for row := 0; row < 4; row++ {
pdf.Rect(x, y, rectW, rectH, "D")
pdf.SetFont("Helvetica", "B", 12)
pdf.SetFillColor(0, 0, 0)
pdf.SetTextColor(250, 250, 230)
pdf.SetXY(x, y+rectH-4)
pdf.CellFormat(rectW, 5, modeList[j], "", 0, "C", true, 0, "")
pdf.SetFont("Helvetica", "I", 150)
pdf.SetTextColor(80, 80, 120)
pdf.SetXY(x, y+2)
pdf.CellFormat(rectW, rectH, "A", "", 0, "C", false, 0, "")
pdf.SetAlpha(0.5, modeList[j])
pdf.Image(example.ImageFile("golang-gopher.png"),
x-gapX, y, rectW+2*gapX, 0, false, "", 0, "")
pdf.SetAlpha(1.0, "Normal")
x += rectW + gapX
j++
}
y += rectH + gapY
}
fileStr := example.Filename("Fpdf_SetAlpha_transparency")
err := pdf.OutputFileAndClose(fileStr)
example.Summary(err, fileStr)
// Output:
// Successfully generated pdf/Fpdf_SetAlpha_transparency.pdf
}
// This example deomstrates various gradients.
func ExampleFpdf_LinearGradient() {
pdf := gofpdf.New("", "", "", "")
pdf.SetFont("Helvetica", "", 12)
pdf.AddPage()
pdf.LinearGradient(0, 0, 210, 100, 250, 250, 255, 220, 220, 225, 0, 0, 0, .5)
pdf.LinearGradient(20, 25, 75, 75, 220, 220, 250, 80, 80, 220, 0, .2, 0, .8)
pdf.Rect(20, 25, 75, 75, "D")
pdf.LinearGradient(115, 25, 75, 75, 220, 220, 250, 80, 80, 220, 0, 0, 1, 1)
pdf.Rect(115, 25, 75, 75, "D")
pdf.RadialGradient(20, 120, 75, 75, 220, 220, 250, 80, 80, 220,
0.25, 0.75, 0.25, 0.75, 1)
pdf.Rect(20, 120, 75, 75, "D")
pdf.RadialGradient(115, 120, 75, 75, 220, 220, 250, 80, 80, 220,
0.25, 0.75, 0.75, 0.75, 0.75)
pdf.Rect(115, 120, 75, 75, "D")
fileStr := example.Filename("Fpdf_LinearGradient_gradient")
err := pdf.OutputFileAndClose(fileStr)
example.Summary(err, fileStr)
// Output:
// Successfully generated pdf/Fpdf_LinearGradient_gradient.pdf
}
// This example demonstrates clipping.
func ExampleFpdf_ClipText() {
pdf := gofpdf.New("", "", "", "")
y := 10.0
pdf.AddPage()
pdf.SetFont("Helvetica", "", 24)
pdf.SetXY(0, y)
pdf.ClipText(10, y+12, "Clipping examples", false)
pdf.RadialGradient(10, y, 100, 20, 128, 128, 160, 32, 32, 48,
0.25, 0.5, 0.25, 0.5, 0.2)
pdf.ClipEnd()
y += 12
pdf.SetFont("Helvetica", "B", 120)
pdf.SetDrawColor(64, 80, 80)
pdf.SetLineWidth(.5)
pdf.ClipText(10, y+40, pdf.String(), true)
pdf.RadialGradient(10, y, 200, 50, 220, 220, 250, 80, 80, 220,
0.25, 0.5, 0.25, 0.5, 1)
pdf.ClipEnd()
y += 55
pdf.ClipRect(10, y, 105, 20, true)
pdf.SetFillColor(255, 255, 255)
pdf.Rect(10, y, 105, 20, "F")
pdf.ClipCircle(40, y+10, 15, false)
pdf.RadialGradient(25, y, 30, 30, 220, 250, 220, 40, 60, 40, 0.3,
0.85, 0.3, 0.85, 0.5)
pdf.ClipEnd()
pdf.ClipEllipse(80, y+10, 20, 15, false)
pdf.RadialGradient(60, y, 40, 30, 250, 220, 220, 60, 40, 40, 0.3,
0.85, 0.3, 0.85, 0.5)
pdf.ClipEnd()
pdf.ClipEnd()
y += 28
pdf.ClipEllipse(26, y+10, 16, 10, true)
pdf.Image(example.ImageFile("logo.jpg"), 10, y, 32, 0, false, "JPG", 0, "")
pdf.ClipEnd()
pdf.ClipCircle(60, y+10, 10, true)
pdf.RadialGradient(50, y, 20, 20, 220, 220, 250, 40, 40, 60, 0.3,
0.7, 0.3, 0.7, 0.5)
pdf.ClipEnd()
pdf.ClipPolygon([]gofpdf.PointType{{X: 80, Y: y + 20}, {X: 90, Y: y},
{X: 100, Y: y + 20}}, true)
pdf.LinearGradient(80, y, 20, 20, 250, 220, 250, 60, 40, 60, 0.5,
1, 0.5, 0.5)
pdf.ClipEnd()
y += 30
pdf.SetLineWidth(.1)
pdf.SetDrawColor(180, 180, 180)
pdf.ClipRoundedRect(10, y, 120, 20, 5, true)
pdf.RadialGradient(10, y, 120, 20, 255, 255, 255, 240, 240, 220,
0.25, 0.75, 0.25, 0.75, 0.5)
pdf.SetXY(5, y-5)
pdf.SetFont("Times", "", 12)
pdf.MultiCell(130, 5, lorem(), "", "", false)
pdf.ClipEnd()
fileStr := example.Filename("Fpdf_ClipText")
err := pdf.OutputFileAndClose(fileStr)
example.Summary(err, fileStr)
// Output:
// Successfully generated pdf/Fpdf_ClipText.pdf
}
// This example generates a PDF document with various page sizes.
func ExampleFpdf_PageSize() {
pdf := gofpdf.NewCustom(&gofpdf.InitType{
UnitStr: "in",
Size: gofpdf.SizeType{Wd: 6, Ht: 6},
FontDirStr: example.FontDir(),
})
pdf.SetMargins(0.5, 1, 0.5)
pdf.SetFont("Times", "", 14)
pdf.AddPageFormat("L", gofpdf.SizeType{Wd: 3, Ht: 12})
pdf.SetXY(0.5, 1.5)
pdf.CellFormat(11, 0.2, "12 in x 3 in", "", 0, "C", false, 0, "")
pdf.AddPage() // Default size established in NewCustom()
pdf.SetXY(0.5, 3)
pdf.CellFormat(5, 0.2, "6 in x 6 in", "", 0, "C", false, 0, "")
pdf.AddPageFormat("P", gofpdf.SizeType{Wd: 3, Ht: 12})
pdf.SetXY(0.5, 6)
pdf.CellFormat(2, 0.2, "3 in x 12 in", "", 0, "C", false, 0, "")
for j := 0; j <= 3; j++ {
wd, ht, u := pdf.PageSize(j)
fmt.Printf("%d: %6.2f %s, %6.2f %s\n", j, wd, u, ht, u)
}
fileStr := example.Filename("Fpdf_PageSize")
err := pdf.OutputFileAndClose(fileStr)
example.Summary(err, fileStr)
// Output:
// 0: 6.00 in, 6.00 in
// 1: 12.00 in, 3.00 in
// 2: 6.00 in, 6.00 in
// 3: 3.00 in, 12.00 in
// Successfully generated pdf/Fpdf_PageSize.pdf
}
// This example demonstrates the Bookmark method.
func ExampleFpdf_Bookmark() {
pdf := gofpdf.New("P", "mm", "A4", "")
pdf.AddPage()
pdf.SetFont("Arial", "", 15)
pdf.Bookmark("Page 1", 0, 0)
pdf.Bookmark("Paragraph 1", 1, -1)
pdf.Cell(0, 6, "Paragraph 1")
pdf.Ln(50)
pdf.Bookmark("Paragraph 2", 1, -1)
pdf.Cell(0, 6, "Paragraph 2")
pdf.AddPage()
pdf.Bookmark("Page 2", 0, 0)
pdf.Bookmark("Paragraph 3", 1, -1)
pdf.Cell(0, 6, "Paragraph 3")
fileStr := example.Filename("Fpdf_Bookmark")
err := pdf.OutputFileAndClose(fileStr)
example.Summary(err, fileStr)
// Output:
// Successfully generated pdf/Fpdf_Bookmark.pdf
}
// This example demonstrates various transformations. It is adapted from an
// example script by Moritz Wagner and Andreas Würmser.
func ExampleFpdf_TransformBegin() {
const (
light = 200
dark = 0
)
var refX, refY float64
var refStr string
pdf := gofpdf.New("P", "mm", "A4", "")
pdf.AddPage()
color := func(val int) {
pdf.SetDrawColor(val, val, val)
pdf.SetTextColor(val, val, val)
}
reference := func(str string, x, y float64, val int) {
color(val)
pdf.Rect(x, y, 40, 10, "D")
pdf.Text(x, y-1, str)
}
refDraw := func(str string, x, y float64) {
refStr = str
refX = x
refY = y
reference(str, x, y, light)
}
refDupe := func() {
reference(refStr, refX, refY, dark)
}
titleStr := "Transformations"
titlePt := 36.0
titleHt := pdf.PointConvert(titlePt)
pdf.SetFont("Helvetica", "", titlePt)
titleWd := pdf.GetStringWidth(titleStr)
titleX := (210 - titleWd) / 2
pdf.Text(titleX, 10+titleHt, titleStr)
pdf.TransformBegin()
pdf.TransformMirrorVertical(10 + titleHt + 0.5)
pdf.ClipText(titleX, 10+titleHt, titleStr, false)
// Remember that the transform will mirror the gradient box too
pdf.LinearGradient(titleX, 10, titleWd, titleHt+4, 120, 120, 120,
255, 255, 255, 0, 0, 0, 0.6)
pdf.ClipEnd()
pdf.TransformEnd()
pdf.SetFont("Helvetica", "", 12)
// Scale by 150% centered by lower left corner of the rectangle
refDraw("Scale", 50, 60)
pdf.TransformBegin()
pdf.TransformScaleXY(150, 50, 70)
refDupe()
pdf.TransformEnd()
// Translate 7 to the right, 5 to the bottom
refDraw("Translate", 125, 60)
pdf.TransformBegin()
pdf.TransformTranslate(7, 5)
refDupe()
pdf.TransformEnd()
// Rotate 20 degrees counter-clockwise centered by the lower left corner of
// the rectangle
refDraw("Rotate", 50, 110)
pdf.TransformBegin()
pdf.TransformRotate(20, 50, 120)
refDupe()
pdf.TransformEnd()
// Skew 30 degrees along the x-axis centered by the lower left corner of the
// rectangle
refDraw("Skew", 125, 110)
pdf.TransformBegin()
pdf.TransformSkewX(30, 125, 110)
refDupe()
pdf.TransformEnd()
// Mirror horizontally with axis of reflection at left side of the rectangle
refDraw("Mirror horizontal", 50, 160)
pdf.TransformBegin()
pdf.TransformMirrorHorizontal(50)
refDupe()
pdf.TransformEnd()
// Mirror vertically with axis of reflection at bottom side of the rectangle
refDraw("Mirror vertical", 125, 160)
pdf.TransformBegin()
pdf.TransformMirrorVertical(170)
refDupe()
pdf.TransformEnd()
// Reflect against a point at the lower left point of rectangle