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// Copyright ©2023 The go-pdf Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
/*
* Copyright (c) 2013-2014 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 fpdf
// Version: 1.7
// Date: 2011-06-18
// Author: Olivier PLATHEY
// Port to Go: Kurt Jung, 2013-07-15
import (
"bytes"
"encoding/json"
"fmt"
"image"
"image/color"
"image/gif"
"image/jpeg"
"image/png"
"io"
"math"
"os"
"path"
"sort"
"strconv"
"strings"
"time"
)
var gl struct {
catalogSort bool
noCompress bool // Initial zero value indicates compression
creationDate time.Time
modDate time.Time
}
type fmtBuffer struct {
bytes.Buffer
}
func (b *fmtBuffer) printf(fmtStr string, args ...interface{}) {
b.Buffer.WriteString(fmt.Sprintf(fmtStr, args...))
}
func fpdfNew(orientationStr, unitStr, sizeStr, fontDirStr string, size SizeType) (f *Fpdf) {
f = new(Fpdf)
if orientationStr == "" {
orientationStr = "p"
} else {
orientationStr = strings.ToLower(orientationStr)
}
if unitStr == "" {
unitStr = "mm"
}
if sizeStr == "" {
sizeStr = "A4"
}
if fontDirStr == "" {
fontDirStr = "."
}
f.page = 0
f.n = 2
f.pages = make([]*bytes.Buffer, 0, 8)
f.pages = append(f.pages, bytes.NewBufferString("")) // pages[0] is unused (1-based)
f.pageSizes = make(map[int]SizeType)
f.pageBoxes = make(map[int]map[string]PageBox)
f.defPageBoxes = make(map[string]PageBox)
f.state = 0
f.fonts = make(map[string]fontDefType)
f.fontFiles = make(map[string]fontFileType)
f.diffs = make([]string, 0, 8)
f.templates = make(map[string]Template)
f.templateObjects = make(map[string]int)
f.importedObjs = make(map[string][]byte)
f.importedObjPos = make(map[string]map[int]string)
f.importedTplObjs = make(map[string]string)
f.importedTplIDs = make(map[string]int)
f.images = make(map[string]*ImageInfoType)
f.pageLinks = make([][]linkType, 0, 8)
f.pageLinks = append(f.pageLinks, make([]linkType, 0)) // pageLinks[0] is unused (1-based)
f.links = make([]intLinkType, 0, 8)
f.links = append(f.links, intLinkType{}) // links[0] is unused (1-based)
f.pageAttachments = make([][]annotationAttach, 0, 8)
f.pageAttachments = append(f.pageAttachments, []annotationAttach{}) //
f.aliasMap = make(map[string]string)
f.inHeader = false
f.inFooter = false
f.lasth = 0
f.fontFamily = ""
f.fontStyle = ""
f.SetFontSize(12)
f.underline = false
f.strikeout = false
f.setDrawColor(0, 0, 0)
f.setFillColor(0, 0, 0)
f.setTextColor(0, 0, 0)
f.colorFlag = false
f.ws = 0
f.fontpath = fontDirStr
// Core fonts
f.coreFonts = map[string]bool{
"courier": true,
"helvetica": true,
"times": true,
"symbol": true,
"zapfdingbats": true,
}
// Scale factor
switch unitStr {
case "pt", "point":
f.k = 1.0
case "mm":
f.k = 72.0 / 25.4
case "cm":
f.k = 72.0 / 2.54
case "in", "inch":
f.k = 72.0
default:
f.err = fmt.Errorf("incorrect unit %s", unitStr)
return
}
f.unitStr = unitStr
// Page sizes
f.stdPageSizes = make(map[string]SizeType)
f.stdPageSizes["a3"] = SizeType{841.89, 1190.55}
f.stdPageSizes["a4"] = SizeType{595.28, 841.89}
f.stdPageSizes["a5"] = SizeType{420.94, 595.28}
f.stdPageSizes["a6"] = SizeType{297.64, 420.94}
f.stdPageSizes["a7"] = SizeType{209.76, 297.64}
f.stdPageSizes["a2"] = SizeType{1190.55, 1683.78}
f.stdPageSizes["a1"] = SizeType{1683.78, 2383.94}
f.stdPageSizes["letter"] = SizeType{612, 792}
f.stdPageSizes["legal"] = SizeType{612, 1008}
f.stdPageSizes["tabloid"] = SizeType{792, 1224}
if size.Wd > 0 && size.Ht > 0 {
f.defPageSize = size
} else {
f.defPageSize = f.getpagesizestr(sizeStr)
if f.err != nil {
return
}
}
f.curPageSize = f.defPageSize
// Page orientation
switch orientationStr {
case "p", "portrait":
f.defOrientation = "P"
f.w = f.defPageSize.Wd
f.h = f.defPageSize.Ht
// dbg("Assign h: %8.2f", f.h)
case "l", "landscape":
f.defOrientation = "L"
f.w = f.defPageSize.Ht
f.h = f.defPageSize.Wd
default:
f.err = fmt.Errorf("incorrect orientation: %s", orientationStr)
return
}
f.curOrientation = f.defOrientation
f.wPt = f.w * f.k
f.hPt = f.h * f.k
// Page margins (1 cm)
margin := 28.35 / f.k
f.SetMargins(margin, margin, margin)
// Interior cell margin (1 mm)
f.cMargin = margin / 10
// Line width (0.2 mm)
f.lineWidth = 0.567 / f.k
// Automatic page break
f.SetAutoPageBreak(true, 2*margin)
// Default display mode
f.SetDisplayMode("default", "default")
if f.err != nil {
return
}
f.acceptPageBreak = func() bool {
return f.autoPageBreak
}
// Enable compression
f.SetCompression(!gl.noCompress)
f.spotColorMap = make(map[string]spotColorType)
f.blendList = make([]blendModeType, 0, 8)
f.blendList = append(f.blendList, blendModeType{}) // blendList[0] is unused (1-based)
f.blendMap = make(map[string]int)
f.blendMode = "Normal"
f.alpha = 1
f.gradientList = make([]gradientType, 0, 8)
f.gradientList = append(f.gradientList, gradientType{}) // gradientList[0] is unused
// Set default PDF version number
f.pdfVersion = pdfVers1_3
f.SetProducer("FPDF "+cnFpdfVersion, true)
f.layerInit()
f.catalogSort = gl.catalogSort
f.creationDate = gl.creationDate
f.modDate = gl.modDate
f.userUnderlineThickness = 1
// create a large enough buffer for formatting float64s.
// math.MaxInt64 needs 19.
// math.MaxUint64 needs 20.
f.fmt.buf = make([]byte, 24)
return
}
// NewCustom returns a pointer to a new Fpdf instance. Its methods are
// subsequently called to produce a single PDF document. NewCustom() is an
// alternative to New() that provides additional customization. The PageSize()
// example demonstrates this method.
func NewCustom(init *InitType) (f *Fpdf) {
return fpdfNew(init.OrientationStr, init.UnitStr, init.SizeStr, init.FontDirStr, init.Size)
}
// New returns a pointer to a new Fpdf instance. Its methods are subsequently
// called to produce a single PDF document.
//
// orientationStr specifies the default page orientation. For portrait mode,
// specify "P" or "Portrait". For landscape mode, specify "L" or "Landscape".
// An empty string will be replaced with "P".
//
// unitStr specifies the unit of length used in size parameters for elements
// other than fonts, which are always measured in points. Specify "pt" for
// point, "mm" for millimeter, "cm" for centimeter, or "in" for inch. An empty
// string will be replaced with "mm".
//
// sizeStr specifies the page size. Acceptable values are "A1", "A2", "A3", "A4", "A5",
// "A6", "A7", "Letter", "Legal", or "Tabloid". An empty string will be replaced with "A4".
//
// fontDirStr specifies the file system location in which font resources will
// be found. An empty string is replaced with ".". This argument only needs to
// reference an actual directory if a font other than one of the core
// fonts is used. The core fonts are "courier", "helvetica" (also called
// "arial"), "times", and "zapfdingbats" (also called "symbol").
func New(orientationStr, unitStr, sizeStr, fontDirStr string) (f *Fpdf) {
return fpdfNew(orientationStr, unitStr, sizeStr, fontDirStr, SizeType{0, 0})
}
// Ok returns true if no processing errors have occurred.
func (f *Fpdf) Ok() bool {
return f.err == nil
}
// Err returns true if a processing error has occurred.
func (f *Fpdf) Err() bool {
return f.err != nil
}
// ClearError unsets the internal Fpdf error. This method should be used with
// care, as an internal error condition usually indicates an unrecoverable
// problem with the generation of a document. It is intended to deal with cases
// in which an error is used to select an alternate form of the document.
func (f *Fpdf) ClearError() {
f.err = nil
}
// SetErrorf sets the internal Fpdf error with formatted text to halt PDF
// generation; this may facilitate error handling by application. If an error
// condition is already set, this call is ignored.
//
// See the documentation for printing in the standard fmt package for details
// about fmtStr and args.
func (f *Fpdf) SetErrorf(fmtStr string, args ...interface{}) {
if f.err == nil {
f.err = fmt.Errorf(fmtStr, args...)
}
}
// String satisfies the fmt.Stringer interface and summarizes the Fpdf
// instance.
func (f *Fpdf) String() string {
return "Fpdf " + cnFpdfVersion
}
// SetError sets an error to halt PDF generation. This may facilitate error
// handling by application. See also Ok(), Err() and Error().
func (f *Fpdf) SetError(err error) {
if f.err == nil && err != nil {
f.err = err
}
}
// Error returns the internal Fpdf error; this will be nil if no error has occurred.
func (f *Fpdf) Error() error {
return f.err
}
// GetPageSize returns the current page's width and height. This is the paper's
// size. To compute the size of the area being used, subtract the margins (see
// GetMargins()).
func (f *Fpdf) GetPageSize() (width, height float64) {
width = f.w
height = f.h
return
}
// GetMargins returns the left, top, right, and bottom margins. The first three
// are set with the SetMargins() method. The bottom margin is set with the
// SetAutoPageBreak() method.
func (f *Fpdf) GetMargins() (left, top, right, bottom float64) {
left = f.lMargin
top = f.tMargin
right = f.rMargin
bottom = f.bMargin
return
}
// SetMargins defines the left, top and right margins. By default, they equal 1
// cm. Call this method to change them. If the value of the right margin is
// less than zero, it is set to the same as the left margin.
func (f *Fpdf) SetMargins(left, top, right float64) {
f.lMargin = left
f.tMargin = top
if right < 0 {
right = left
}
f.rMargin = right
}
// SetLeftMargin defines the left margin. The method can be called before
// creating the first page. If the current abscissa gets out of page, it is
// brought back to the margin.
func (f *Fpdf) SetLeftMargin(margin float64) {
f.lMargin = margin
if f.page > 0 && f.x < margin {
f.x = margin
}
}
// GetCellMargin returns the cell margin. This is the amount of space before
// and after the text within a cell that's left blank, and is in units passed
// to New(). It defaults to 1mm.
func (f *Fpdf) GetCellMargin() float64 {
return f.cMargin
}
// SetCellMargin sets the cell margin. This is the amount of space before and
// after the text within a cell that's left blank, and is in units passed to
// New().
func (f *Fpdf) SetCellMargin(margin float64) {
f.cMargin = margin
}
// SetPageBoxRec sets the page box for the current page, and any following
// pages. Allowable types are trim, trimbox, crop, cropbox, bleed, bleedbox,
// art and artbox box types are case insensitive. See SetPageBox() for a method
// that specifies the coordinates and extent of the page box individually.
func (f *Fpdf) SetPageBoxRec(t string, pb PageBox) {
switch strings.ToLower(t) {
case "trim":
fallthrough
case "trimbox":
t = "TrimBox"
case "crop":
fallthrough
case "cropbox":
t = "CropBox"
case "bleed":
fallthrough
case "bleedbox":
t = "BleedBox"
case "art":
fallthrough
case "artbox":
t = "ArtBox"
default:
f.err = fmt.Errorf("%s is not a valid page box type", t)
return
}
pb.X = pb.X * f.k
pb.Y = pb.Y * f.k
pb.Wd = (pb.Wd * f.k) + pb.X
pb.Ht = (pb.Ht * f.k) + pb.Y
if f.page > 0 {
f.pageBoxes[f.page][t] = pb
}
// always override. page defaults are supplied in addPage function
f.defPageBoxes[t] = pb
}
// SetPageBox sets the page box for the current page, and any following pages.
// Allowable types are trim, trimbox, crop, cropbox, bleed, bleedbox, art and
// artbox box types are case insensitive.
func (f *Fpdf) SetPageBox(t string, x, y, wd, ht float64) {
f.SetPageBoxRec(t, PageBox{SizeType{Wd: wd, Ht: ht}, PointType{X: x, Y: y}})
}
// SetPage sets the current page to that of a valid page in the PDF document.
// pageNum is one-based. The SetPage() example demonstrates this method.
func (f *Fpdf) SetPage(pageNum int) {
if (pageNum > 0) && (pageNum < len(f.pages)) {
f.page = pageNum
}
}
// PageCount returns the number of pages currently in the document. Since page
// numbers in gofpdf are one-based, the page count is the same as the page
// number of the current last page.
func (f *Fpdf) PageCount() int {
return len(f.pages) - 1
}
// SetFontLocation sets the location in the file system of the font and font
// definition files.
func (f *Fpdf) SetFontLocation(fontDirStr string) {
f.fontpath = fontDirStr
}
// SetFontLoader sets a loader used to read font files (.json and .z) from an
// arbitrary source. If a font loader has been specified, it is used to load
// the named font resources when AddFont() is called. If this operation fails,
// an attempt is made to load the resources from the configured font directory
// (see SetFontLocation()).
func (f *Fpdf) SetFontLoader(loader FontLoader) {
f.fontLoader = loader
}
// SetHeaderFuncMode sets the function that lets the application render the
// page header. See SetHeaderFunc() for more details. The value for homeMode
// should be set to true to have the current position set to the left and top
// margin after the header function is called.
func (f *Fpdf) SetHeaderFuncMode(fnc func(), homeMode bool) {
f.headerFnc = fnc
f.headerHomeMode = homeMode
}
// SetHeaderFunc sets the function that lets the application render the page
// header. The specified function is automatically called by AddPage() and
// should not be called directly by the application. The implementation in Fpdf
// is empty, so you have to provide an appropriate function if you want page
// headers. fnc will typically be a closure that has access to the Fpdf
// instance and other document generation variables.
//
// A header is a convenient place to put background content that repeats on
// each page such as a watermark. When this is done, remember to reset the X
// and Y values so the normal content begins where expected. Including a
// watermark on each page is demonstrated in the example for TransformRotate.
//
// This method is demonstrated in the example for AddPage().
func (f *Fpdf) SetHeaderFunc(fnc func()) {
f.headerFnc = fnc
}
// SetFooterFunc sets the function that lets the application render the page
// footer. The specified function is automatically called by AddPage() and
// Close() and should not be called directly by the application. The
// implementation in Fpdf is empty, so you have to provide an appropriate
// function if you want page footers. fnc will typically be a closure that has
// access to the Fpdf instance and other document generation variables. See
// SetFooterFuncLpi for a similar function that passes a last page indicator.
//
// This method is demonstrated in the example for AddPage().
func (f *Fpdf) SetFooterFunc(fnc func()) {
f.footerFnc = fnc
f.footerFncLpi = nil
}
// SetFooterFuncLpi sets the function that lets the application render the page
// footer. The specified function is automatically called by AddPage() and
// Close() and should not be called directly by the application. It is passed a
// boolean that is true if the last page of the document is being rendered. The
// implementation in Fpdf is empty, so you have to provide an appropriate
// function if you want page footers. fnc will typically be a closure that has
// access to the Fpdf instance and other document generation variables.
func (f *Fpdf) SetFooterFuncLpi(fnc func(lastPage bool)) {
f.footerFncLpi = fnc
f.footerFnc = nil
}
// SetTopMargin defines the top margin. The method can be called before
// creating the first page.
func (f *Fpdf) SetTopMargin(margin float64) {
f.tMargin = margin
}
// SetRightMargin defines the right margin. The method can be called before
// creating the first page.
func (f *Fpdf) SetRightMargin(margin float64) {
f.rMargin = margin
}
// GetAutoPageBreak returns true if automatic pages breaks are enabled, false
// otherwise. This is followed by the triggering limit from the bottom of the
// page. This value applies only if automatic page breaks are enabled.
func (f *Fpdf) GetAutoPageBreak() (auto bool, margin float64) {
auto = f.autoPageBreak
margin = f.bMargin
return
}
// SetAutoPageBreak enables or disables the automatic page breaking mode. When
// enabling, the second parameter is the distance from the bottom of the page
// that defines the triggering limit. By default, the mode is on and the margin
// is 2 cm.
func (f *Fpdf) SetAutoPageBreak(auto bool, margin float64) {
f.autoPageBreak = auto
f.bMargin = margin
f.pageBreakTrigger = f.h - margin
}
// SetDisplayMode sets advisory display directives for the document viewer.
// Pages can be displayed entirely on screen, occupy the full width of the
// window, use real size, be scaled by a specific zooming factor or use viewer
// default (configured in the Preferences menu of Adobe Reader). The page
// layout can be specified so that pages are displayed individually or in
// pairs.
//
// zoomStr can be "fullpage" to display the entire page on screen, "fullwidth"
// to use maximum width of window, "real" to use real size (equivalent to 100%
// zoom) or "default" to use viewer default mode.
//
// layoutStr can be "single" (or "SinglePage") to display one page at once,
// "continuous" (or "OneColumn") to display pages continuously, "two" (or
// "TwoColumnLeft") to display two pages on two columns with odd-numbered pages
// on the left, or "TwoColumnRight" to display two pages on two columns with
// odd-numbered pages on the right, or "TwoPageLeft" to display pages two at a
// time with odd-numbered pages on the left, or "TwoPageRight" to display pages
// two at a time with odd-numbered pages on the right, or "default" to use
// viewer default mode.
func (f *Fpdf) SetDisplayMode(zoomStr, layoutStr string) {
if f.err != nil {
return
}
if layoutStr == "" {
layoutStr = "default"
}
switch zoomStr {
case "fullpage", "fullwidth", "real", "default":
f.zoomMode = zoomStr
default:
f.err = fmt.Errorf("incorrect zoom display mode: %s", zoomStr)
return
}
switch layoutStr {
case "single", "continuous", "two", "default", "SinglePage", "OneColumn",
"TwoColumnLeft", "TwoColumnRight", "TwoPageLeft", "TwoPageRight":
f.layoutMode = layoutStr
default:
f.err = fmt.Errorf("incorrect layout display mode: %s", layoutStr)
return
}
}
// SetDefaultCompression controls the default setting of the internal
// compression flag. See SetCompression() for more details. Compression is on
// by default.
func SetDefaultCompression(compress bool) {
gl.noCompress = !compress
}
// SetCompression activates or deactivates page compression with zlib. When
// activated, the internal representation of each page is compressed, which
// leads to a compression ratio of about 2 for the resulting document.
// Compression is on by default.
func (f *Fpdf) SetCompression(compress bool) {
f.compress = compress
}
// SetProducer defines the producer of the document. isUTF8 indicates if the string
// is encoded in ISO-8859-1 (false) or UTF-8 (true).
func (f *Fpdf) SetProducer(producerStr string, isUTF8 bool) {
if isUTF8 {
producerStr = utf8toutf16(producerStr)
}
f.producer = producerStr
}
// SetTitle defines the title of the document. isUTF8 indicates if the string
// is encoded in ISO-8859-1 (false) or UTF-8 (true).
func (f *Fpdf) SetTitle(titleStr string, isUTF8 bool) {
if isUTF8 {
titleStr = utf8toutf16(titleStr)
}
f.title = titleStr
}
// SetSubject defines the subject of the document. isUTF8 indicates if the
// string is encoded in ISO-8859-1 (false) or UTF-8 (true).
func (f *Fpdf) SetSubject(subjectStr string, isUTF8 bool) {
if isUTF8 {
subjectStr = utf8toutf16(subjectStr)
}
f.subject = subjectStr
}
// SetAuthor defines the author of the document. isUTF8 indicates if the string
// is encoded in ISO-8859-1 (false) or UTF-8 (true).
func (f *Fpdf) SetAuthor(authorStr string, isUTF8 bool) {
if isUTF8 {
authorStr = utf8toutf16(authorStr)
}
f.author = authorStr
}
// SetLang defines the natural language of the document (e.g. "de-CH").
func (f *Fpdf) SetLang(lang string) {
f.lang = lang
}
// SetKeywords defines the keywords of the document. keywordStr is a
// space-delimited string, for example "invoice August". isUTF8 indicates if
// the string is encoded
func (f *Fpdf) SetKeywords(keywordsStr string, isUTF8 bool) {
if isUTF8 {
keywordsStr = utf8toutf16(keywordsStr)
}
f.keywords = keywordsStr
}
// SetCreator defines the creator of the document. isUTF8 indicates if the
// string is encoded in ISO-8859-1 (false) or UTF-8 (true).
func (f *Fpdf) SetCreator(creatorStr string, isUTF8 bool) {
if isUTF8 {
creatorStr = utf8toutf16(creatorStr)
}
f.creator = creatorStr
}
// SetXmpMetadata defines XMP metadata that will be embedded with the document.
func (f *Fpdf) SetXmpMetadata(xmpStream []byte) {
f.xmp = xmpStream
}
// AliasNbPages defines an alias for the total number of pages. It will be
// substituted as the document is closed. An empty string is replaced with the
// string "{nb}".
//
// See the example for AddPage() for a demonstration of this method.
func (f *Fpdf) AliasNbPages(aliasStr string) {
if aliasStr == "" {
aliasStr = "{nb}"
}
f.aliasNbPagesStr = aliasStr
}
// RTL enables right-to-left mode
func (f *Fpdf) RTL() {
f.isRTL = true
}
// LTR disables right-to-left mode
func (f *Fpdf) LTR() {
f.isRTL = false
}
// open begins a document
func (f *Fpdf) open() {
f.state = 1
}
// Close terminates the PDF document. It is not necessary to call this method
// explicitly because Output(), OutputAndClose() and OutputFileAndClose() do it
// automatically. If the document contains no page, AddPage() is called to
// prevent the generation of an invalid document.
func (f *Fpdf) Close() {
if f.err == nil {
if f.clipNest > 0 {
f.err = fmt.Errorf("clip procedure must be explicitly ended")
} else if f.transformNest > 0 {
f.err = fmt.Errorf("transformation procedure must be explicitly ended")
}
}
if f.err != nil {
return
}
if f.state == 3 {
return
}
if f.page == 0 {
f.AddPage()
if f.err != nil {
return
}
}
// Page footer
f.inFooter = true
if f.footerFnc != nil {
f.footerFnc()
} else if f.footerFncLpi != nil {
f.footerFncLpi(true)
}
f.inFooter = false
// Close page
f.endpage()
// Close document
f.enddoc()
}
// PageSize returns the width and height of the specified page in the units
// established in New(). These return values are followed by the unit of
// measure itself. If pageNum is zero or otherwise out of bounds, it returns
// the default page size, that is, the size of the page that would be added by
// AddPage().
func (f *Fpdf) PageSize(pageNum int) (wd, ht float64, unitStr string) {
sz, ok := f.pageSizes[pageNum]
if ok {
sz.Wd, sz.Ht = sz.Wd/f.k, sz.Ht/f.k
} else {
sz = f.defPageSize // user units
}
return sz.Wd, sz.Ht, f.unitStr
}
// AddPageFormat adds a new page with non-default orientation or size. See
// AddPage() for more details.
//
// See New() for a description of orientationStr.
//
// size specifies the size of the new page in the units established in New().
//
// The PageSize() example demonstrates this method.
func (f *Fpdf) AddPageFormat(orientationStr string, size SizeType) {
if f.err != nil {
return
}
if f.page != len(f.pages)-1 {
f.page = len(f.pages) - 1
}
if f.state == 0 {
f.open()
}
familyStr := f.fontFamily
style := f.fontStyle
if f.underline {
style += "U"
}
if f.strikeout {
style += "S"
}
fontsize := f.fontSizePt
lw := f.lineWidth
dc := f.color.draw
fc := f.color.fill
tc := f.color.text
cf := f.colorFlag
if f.page > 0 {
f.inFooter = true
// Page footer avoid double call on footer.
if f.footerFnc != nil {
f.footerFnc()
} else if f.footerFncLpi != nil {
f.footerFncLpi(false) // not last page.
}
f.inFooter = false
// Close page
f.endpage()
}
// Start new page
f.beginpage(orientationStr, size)
// Set line cap style to current value
// f.out("2 J")
f.outf("%d J", f.capStyle)
// Set line join style to current value
f.outf("%d j", f.joinStyle)
// Set line width
f.lineWidth = lw
f.outf("%.2f w", lw*f.k)
// Set dash pattern
if len(f.dashArray) > 0 {
f.outputDashPattern()
}
// Set font
if familyStr != "" {
f.SetFont(familyStr, style, fontsize)
if f.err != nil {
return
}
}
// Set colors
f.color.draw = dc
if dc.str != "0 G" {
f.out(dc.str)
}
f.color.fill = fc
if fc.str != "0 g" {
f.out(fc.str)
}
f.color.text = tc
f.colorFlag = cf
// Page header
if f.headerFnc != nil {
f.inHeader = true
f.headerFnc()
f.inHeader = false
if f.headerHomeMode {
f.SetHomeXY()
}
}
// Restore line width
if f.lineWidth != lw {
f.lineWidth = lw
f.outf("%.2f w", lw*f.k)
}
// Restore font
if familyStr != "" {
f.SetFont(familyStr, style, fontsize)
if f.err != nil {
return
}
}
// Restore colors
if f.color.draw.str != dc.str {
f.color.draw = dc
f.out(dc.str)
}
if f.color.fill.str != fc.str {
f.color.fill = fc
f.out(fc.str)
}
f.color.text = tc
f.colorFlag = cf
}
// AddPage adds a new page to the document. If a page is already present, the
// Footer() method is called first to output the footer. Then the page is
// added, the current position set to the top-left corner according to the left
// and top margins, and Header() is called to display the header.
//
// The font which was set before calling is automatically restored. There is no
// need to call SetFont() again if you want to continue with the same font. The
// same is true for colors and line width.
//
// The origin of the coordinate system is at the top-left corner and increasing
// ordinates go downwards.
//
// See AddPageFormat() for a version of this method that allows the page size
// and orientation to be different than the default.
func (f *Fpdf) AddPage() {
if f.err != nil {
return
}
// dbg("AddPage")
f.AddPageFormat(f.defOrientation, f.defPageSize)
}
// PageNo returns the current page number.
//
// See the example for AddPage() for a demonstration of this method.
func (f *Fpdf) PageNo() int {
return f.page
}
func colorComp(v int) (int, float64) {
if v < 0 {
v = 0
} else if v > 255 {
v = 255
}
return v, float64(v) / 255.0
}
func (f *Fpdf) rgbColorValue(r, g, b int, grayStr, fullStr string) (clr colorType) {
clr.ir, clr.r = colorComp(r)
clr.ig, clr.g = colorComp(g)
clr.ib, clr.b = colorComp(b)
clr.mode = colorModeRGB
clr.gray = clr.ir == clr.ig && clr.r == clr.b
const prec = 3
if len(grayStr) > 0 {
if clr.gray {
// clr.str = sprintf("%.3f %s", clr.r, grayStr)
f.fmt.col.Reset()
f.fmt.col.WriteString(f.fmtF64(clr.r, prec))
f.fmt.col.WriteString(" ")
f.fmt.col.WriteString(grayStr)
clr.str = f.fmt.col.String()
} else {
// clr.str = sprintf("%.3f %.3f %.3f %s", clr.r, clr.g, clr.b, fullStr)
f.fmt.col.Reset()
f.fmt.col.WriteString(f.fmtF64(clr.r, prec))
f.fmt.col.WriteString(" ")
f.fmt.col.WriteString(f.fmtF64(clr.g, prec))
f.fmt.col.WriteString(" ")
f.fmt.col.WriteString(f.fmtF64(clr.b, prec))
f.fmt.col.WriteString(" ")
f.fmt.col.WriteString(fullStr)
clr.str = f.fmt.col.String()
}
} else {
// clr.str = sprintf("%.3f %.3f %.3f", clr.r, clr.g, clr.b)
f.fmt.col.Reset()
f.fmt.col.WriteString(f.fmtF64(clr.r, prec))
f.fmt.col.WriteString(" ")
f.fmt.col.WriteString(f.fmtF64(clr.g, prec))
f.fmt.col.WriteString(" ")
f.fmt.col.WriteString(f.fmtF64(clr.b, prec))
clr.str = f.fmt.col.String()
}
return
}
// SetDrawColor defines the color used for all drawing operations (lines,
// rectangles and cell borders). It is expressed in RGB components (0 - 255).
// The method can be called before the first page is created. The value is
// retained from page to page.
func (f *Fpdf) SetDrawColor(r, g, b int) {
f.setDrawColor(r, g, b)
}
func (f *Fpdf) setDrawColor(r, g, b int) {
f.color.draw = f.rgbColorValue(r, g, b, "G", "RG")
if f.page > 0 {
f.out(f.color.draw.str)
}
}
// GetDrawColor returns the most recently set draw color as RGB components (0 -
// 255). This will not be the current value if a draw color of some other type
// (for example, spot) has been more recently set.
func (f *Fpdf) GetDrawColor() (int, int, int) {
return f.color.draw.ir, f.color.draw.ig, f.color.draw.ib
}
// SetFillColor defines the color used for all filling operations (filled
// rectangles and cell backgrounds). It is expressed in RGB components (0
// -255). The method can be called before the first page is created and the
// value is retained from page to page.
func (f *Fpdf) SetFillColor(r, g, b int) {
f.setFillColor(r, g, b)
}
func (f *Fpdf) setFillColor(r, g, b int) {
f.color.fill = f.rgbColorValue(r, g, b, "g", "rg")
f.colorFlag = f.color.fill.str != f.color.text.str
if f.page > 0 {
f.out(f.color.fill.str)
}
}
// GetFillColor returns the most recently set fill color as RGB components (0 -
// 255). This will not be the current value if a fill color of some other type
// (for example, spot) has been more recently set.
func (f *Fpdf) GetFillColor() (int, int, int) {
return f.color.fill.ir, f.color.fill.ig, f.color.fill.ib
}
// SetTextColor defines the color used for text. It is expressed in RGB
// components (0 - 255). The method can be called before the first page is
// created. The value is retained from page to page.
func (f *Fpdf) SetTextColor(r, g, b int) {
f.setTextColor(r, g, b)
}
func (f *Fpdf) setTextColor(r, g, b int) {
f.color.text = f.rgbColorValue(r, g, b, "g", "rg")
f.colorFlag = f.color.fill.str != f.color.text.str
}
// GetTextColor returns the most recently set text color as RGB components (0 -
// 255). This will not be the current value if a text color of some other type
// (for example, spot) has been more recently set.
func (f *Fpdf) GetTextColor() (int, int, int) {
return f.color.text.ir, f.color.text.ig, f.color.text.ib
}
// GetStringWidth returns the length of a string in user units. A font must be
// currently selected.
func (f *Fpdf) GetStringWidth(s string) float64 {
if f.err != nil {
return 0
}
w := f.GetStringSymbolWidth(s)
return float64(w) * f.fontSize / 1000
}
// GetStringSymbolWidth returns the length of a string in glyf units. A font must be
// currently selected.
func (f *Fpdf) GetStringSymbolWidth(s string) int {
if f.err != nil {
return 0
}
w := 0
if f.isCurrentUTF8 {
for _, char := range s {
intChar := int(char)
if len(f.currentFont.Cw) >= intChar && f.currentFont.Cw[intChar] > 0 {
if f.currentFont.Cw[intChar] != 65535 {
w += f.currentFont.Cw[intChar]
}