summaryrefslogtreecommitdiff
path: root/def.go
blob: 15e6939598daa67db91e2083f6fd4bff770cff82 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
/*
 * 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 gofpdf

import (
	"bytes"
)

// Version of FPDF from which this package is derived
const (
	cnFpdfVersion = "1.7"
)

type blendModeType struct {
	strokeStr, fillStr, modeStr string
	objNum                      int
}

type gradientType struct {
	tp                int // 2: linear, 3: radial
	clr1Str, clr2Str  string
	x1, y1, x2, y2, r float64
	objNum            int
}

// SizeType fields Wd and Ht specify the horizontal and vertical extents of a
// document element such as a page.
type SizeType struct {
	Wd, Ht float64
}

// PointType fields X and Y specify the horizontal and vertical coordinates of
// a point, typically used in drawing.
type PointType struct {
	X, Y float64
}

// ImageInfoType contains size, color and other information about an image
type ImageInfoType struct {
	data  []byte
	smask []byte
	i     int
	n     int
	w     float64
	h     float64
	cs    string
	pal   []byte
	bpc   int
	f     string
	dp    string
	trns  []int
	scale float64 // document scaling factor
}

// PointConvert returns the value of pt, expressed in points (1/72 inch), as a
// value expressed in the unit of measure specified in New(). Since font
// management in Fpdf uses points, this method can help with line height
// calculations and other methods that require user units.
func (f *Fpdf) PointConvert(pt float64) float64 {
	return pt / f.k
}

// Extent returns the width and height of the image in the units of the Fpdf
// object.
func (info *ImageInfoType) Extent() (wd, ht float64) {
	return info.w / info.scale, info.h / info.scale
}

// Width returns the width of the image in the units of the Fpdf object.
func (info *ImageInfoType) Width() float64 {
	return info.w / info.scale
}

// Height returns the height of the image in the units of the Fpdf object.
func (info *ImageInfoType) Height() float64 {
	return info.h / info.scale
}

type fontFileType struct {
	length1, length2 int64
	n                int
}

type linkType struct {
	x, y, wd, ht float64
	link         int    // Auto-generated internal link ID or...
	linkStr      string // ...application-provided external link string
}

type intLinkType struct {
	page int
	y    float64
}

// outlineType is used for a sidebar outline of bookmarks
type outlineType struct {
	text                                   string
	level, parent, first, last, next, prev int
	y                                      float64
	p                                      int
}

// InitType is used with NewCustom() to customize an Fpdf instance.
// OrientationStr, UnitStr, SizeStr and FontDirStr correspond to the arguments
// accepted by New(). If the Wd and Ht fields of Size are each greater than
// zero, Size will be used to set the default page size rather than SizeStr. Wd
// and Ht are specified in the units of measure indicated by UnitStr.
type InitType struct {
	OrientationStr string
	UnitStr        string
	SizeStr        string
	Size           SizeType
	FontDirStr     string
}

// Fpdf is the principal structure for creating a single PDF document
type Fpdf struct {
	page             int                       // current page number
	n                int                       // current object number
	offsets          []int                     // array of object offsets
	buffer           fmtBuffer                 // buffer holding in-memory PDF
	pages            []*bytes.Buffer           // slice[page] of page content; 1-based
	state            int                       // current document state
	compress         bool                      // compression flag
	k                float64                   // scale factor (number of points in user unit)
	defOrientation   string                    // default orientation
	curOrientation   string                    // current orientation
	stdPageSizes     map[string]SizeType       // standard page sizes
	defPageSize      SizeType                  // default page size
	curPageSize      SizeType                  // current page size
	pageSizes        map[int]SizeType          // used for pages with non default sizes or orientations
	unitStr          string                    // unit of measure for all rendered objects except fonts
	wPt, hPt         float64                   // dimensions of current page in points
	w, h             float64                   // dimensions of current page in user unit
	lMargin          float64                   // left margin
	tMargin          float64                   // top margin
	rMargin          float64                   // right margin
	bMargin          float64                   // page break margin
	cMargin          float64                   // cell margin
	x, y             float64                   // current position in user unit
	lasth            float64                   // height of last printed cell
	lineWidth        float64                   // line width in user unit
	fontpath         string                    // path containing fonts
	coreFonts        map[string]bool           // array of core font names
	fonts            map[string]fontDefType    // array of used fonts
	fontFiles        map[string]fontFileType   // array of font files
	diffs            []string                  // array of encoding differences
	fontFamily       string                    // current font family
	fontStyle        string                    // current font style
	underline        bool                      // underlining flag
	currentFont      fontDefType               // current font info
	fontSizePt       float64                   // current font size in points
	fontSize         float64                   // current font size in user unit
	ws               float64                   // word spacing
	images           map[string]*ImageInfoType // array of used images
	pageLinks        [][]linkType              // pageLinks[page][link], both 1-based
	links            []intLinkType             // array of internal links
	outlines         []outlineType             // array of outlines
	outlineRoot      int                       // root of outlines
	autoPageBreak    bool                      // automatic page breaking
	acceptPageBreak  func() bool               // returns true to accept page break
	pageBreakTrigger float64                   // threshold used to trigger page breaks
	inHeader         bool                      // flag set when processing header
	headerFnc        func()                    // function provided by app and called to write header
	inFooter         bool                      // flag set when processing footer
	footerFnc        func()                    // function provided by app and called to write footer
	zoomMode         string                    // zoom display mode
	layoutMode       string                    // layout display mode
	title            string                    // title
	subject          string                    // subject
	author           string                    // author
	keywords         string                    // keywords
	creator          string                    // creator
	aliasNbPagesStr  string                    // alias for total number of pages
	pdfVersion       string                    // PDF version number
	fontDirStr       string                    // location of font definition files
	capStyle         int                       // line cap style: butt 0, round 1, square 2
	joinStyle        int                       // line segment join style: miter 0, round 1, bevel 2
	blendList        []blendModeType           // slice[idx] of alpha transparency modes, 1-based
	blendMap         map[string]int            // map into blendList
	gradientList     []gradientType            // slice[idx] of gradient records
	clipNest         int                       // Number of active clipping contexts
	transformNest    int                       // Number of active transformation contexts
	err              error                     // Set if error occurs during life cycle of instance
	colorFlag        bool                      // indicates whether fill and text colors are different
	color            struct {                  // Composite values of colors
		draw, fill, text clrType
	}
}

type encType struct {
	uv   int
	name string
}

type encListType [256]encType

type fontBoxType struct {
	Xmin, Ymin, Xmax, Ymax int
}

type fontDescType struct {
	Ascent       int
	Descent      int
	CapHeight    int
	Flags        int
	FontBBox     fontBoxType
	ItalicAngle  int
	StemV        int
	MissingWidth int
}

type fontDefType struct {
	Tp           string       // "Core", "TrueType", ...
	Name         string       // "Courier-Bold", ...
	Desc         fontDescType // Font descriptor
	Up           int          // Underline position
	Ut           int          // Underline thickness
	Cw           [256]int     // Character width by ordinal
	Enc          string       // "cp1252", ...
	Diff         string       // Differences from reference encoding
	File         string       // "Redressed.z"
	Size1, Size2 int          // Type1 values
	OriginalSize int          // Size of uncompressed font file
	I            int          // 1-based position in font list, set by font loader, not this program
	N            int          // Set by font loader
	DiffN        int          // Position of diff in app array, set by font loader
}

type fontInfoType struct {
	Data               []byte
	File               string
	OriginalSize       int
	FontName           string
	Bold               bool
	IsFixedPitch       bool
	UnderlineThickness int
	UnderlinePosition  int
	Widths             [256]int
	Size1, Size2       uint32
	Desc               fontDescType
}