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
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
use printpdf::*;
fn main() {
// Create a new PDF document
let mut doc = PdfDocument::new("Layers Example");
// Create layers with different purposes
let background_layer = Layer {
name: "Background".to_string(),
creator: "printpdf".to_string(),
intent: LayerIntent::View,
usage: LayerSubtype::Artwork,
};
let text_layer = Layer {
name: "Text Content".to_string(),
creator: "printpdf".to_string(),
intent: LayerIntent::Design,
usage: LayerSubtype::Artwork,
};
let graphics_layer = Layer {
name: "Graphics".to_string(),
creator: "printpdf".to_string(),
intent: LayerIntent::Design,
usage: LayerSubtype::Artwork,
};
// Add the layers to the document and get their IDs
let bg_layer_id = doc.add_layer(&background_layer);
let text_layer_id = doc.add_layer(&text_layer);
let graphics_layer_id = doc.add_layer(&graphics_layer);
// Create operations for our page, organizing content by layers
let mut ops = Vec::new();
// Background layer content - a colored rectangle covering the page
ops.extend_from_slice(&[
Op::BeginLayer {
layer_id: bg_layer_id.clone(),
},
Op::SetFillColor {
col: Color::Rgb(Rgb {
r: 0.95,
g: 0.95,
b: 0.95,
icc_profile: None,
}),
},
Op::DrawPolygon {
polygon: Polygon {
rings: vec![PolygonRing {
points: vec![
LinePoint {
p: Point {
x: Pt(0.0),
y: Pt(0.0),
},
bezier: false,
},
LinePoint {
p: Point {
x: Pt(595.0),
y: Pt(0.0),
}, // A4 width in points
bezier: false,
},
LinePoint {
p: Point {
x: Pt(595.0),
y: Pt(842.0),
}, // A4 height in points
bezier: false,
},
LinePoint {
p: Point {
x: Pt(0.0),
y: Pt(842.0),
},
bezier: false,
},
],
}],
mode: PaintMode::Fill,
winding_order: WindingOrder::NonZero,
},
},
Op::EndLayer,
]);
// Text layer content
ops.extend_from_slice(&[
Op::BeginLayer {
layer_id: text_layer_id.clone(),
},
Op::StartTextSection,
Op::SetTextCursor {
pos: Point::new(Mm(20.0), Mm(270.0)),
},
Op::SetFont {
font: PdfFontHandle::Builtin(BuiltinFont::Helvetica),
size: Pt(24.0),
},
Op::SetLineHeight { lh: Pt(24.0) },
Op::SetFillColor {
col: Color::Rgb(Rgb {
r: 0.0,
g: 0.0,
b: 0.6,
icc_profile: None,
}),
},
Op::ShowText {
items: vec![TextItem::Text("PDF Layers Example".to_string())],
},
Op::AddLineBreak,
Op::SetFont {
font: PdfFontHandle::Builtin(BuiltinFont::Helvetica),
size: Pt(12.0),
},
Op::SetLineHeight { lh: Pt(12.0) },
Op::SetFillColor {
col: Color::Rgb(Rgb {
r: 0.0,
g: 0.0,
b: 0.0,
icc_profile: None,
}),
},
Op::ShowText {
items: vec![TextItem::Text(
"This PDF demonstrates the use of layers (also called Optional Content Groups)."
.to_string(),
)],
},
Op::AddLineBreak,
Op::ShowText {
items: vec![TextItem::Text(
"The content is organized in three separate layers:".to_string(),
)],
},
Op::AddLineBreak,
Op::ShowText {
items: vec![TextItem::Text(
"1. Background - light gray background".to_string(),
)],
},
Op::AddLineBreak,
Op::ShowText {
items: vec![TextItem::Text(
"2. Text Content - the text you're reading now".to_string(),
)],
},
Op::AddLineBreak,
Op::ShowText {
items: vec![TextItem::Text(
"3. Graphics - shapes and visual elements".to_string(),
)],
},
Op::AddLineBreak,
Op::AddLineBreak,
Op::ShowText {
items: vec![TextItem::Text(
"In a PDF viewer that supports layers, you can toggle these on and off."
.to_string(),
)],
},
Op::EndTextSection,
Op::EndLayer,
]);
// Graphics layer content
ops.extend_from_slice(&[
Op::BeginLayer {
layer_id: graphics_layer_id.clone(),
},
// Draw a circle (approximated with bezier curves)
Op::SetFillColor {
col: Color::Rgb(Rgb {
r: 1.0,
g: 0.8,
b: 0.0,
icc_profile: None,
}),
},
Op::SetOutlineColor {
col: Color::Rgb(Rgb {
r: 0.8,
g: 0.4,
b: 0.0,
icc_profile: None,
}),
},
Op::SetOutlineThickness { pt: Pt(2.0) },
// Draw a rectangle
Op::DrawPolygon {
polygon: Polygon {
rings: vec![PolygonRing {
points: vec![
LinePoint {
p: Point {
x: Pt(100.0),
y: Pt(100.0),
},
bezier: false,
},
LinePoint {
p: Point {
x: Pt(200.0),
y: Pt(100.0),
},
bezier: false,
},
LinePoint {
p: Point {
x: Pt(200.0),
y: Pt(150.0),
},
bezier: false,
},
LinePoint {
p: Point {
x: Pt(100.0),
y: Pt(150.0),
},
bezier: false,
},
],
}],
mode: PaintMode::FillStroke,
winding_order: WindingOrder::NonZero,
},
},
// Draw a triangle
Op::SetFillColor {
col: Color::Rgb(Rgb {
r: 0.0,
g: 0.7,
b: 0.7,
icc_profile: None,
}),
},
Op::DrawPolygon {
polygon: Polygon {
rings: vec![PolygonRing {
points: vec![
LinePoint {
p: Point {
x: Pt(300.0),
y: Pt(100.0),
},
bezier: false,
},
LinePoint {
p: Point {
x: Pt(400.0),
y: Pt(100.0),
},
bezier: false,
},
LinePoint {
p: Point {
x: Pt(350.0),
y: Pt(180.0),
},
bezier: false,
},
],
}],
mode: PaintMode::FillStroke,
winding_order: WindingOrder::NonZero,
},
},
// Draw some lines
Op::SetOutlineColor {
col: Color::Rgb(Rgb {
r: 0.7,
g: 0.0,
b: 0.7,
icc_profile: None,
}),
},
Op::SetOutlineThickness { pt: Pt(3.0) },
Op::DrawLine {
line: Line {
points: vec![
LinePoint {
p: Point {
x: Pt(450.0),
y: Pt(100.0),
},
bezier: false,
},
LinePoint {
p: Point {
x: Pt(550.0),
y: Pt(180.0),
},
bezier: false,
},
],
is_closed: false,
},
},
// Set line dash pattern and draw another line
Op::SetLineDashPattern {
dash: LineDashPattern {
offset: 0,
dash_1: Some(10),
gap_1: Some(5),
dash_2: None,
gap_2: None,
dash_3: None,
gap_3: None,
},
},
Op::DrawLine {
line: Line {
points: vec![
LinePoint {
p: Point {
x: Pt(450.0),
y: Pt(130.0),
},
bezier: false,
},
LinePoint {
p: Point {
x: Pt(550.0),
y: Pt(210.0),
},
bezier: false,
},
],
is_closed: false,
},
},
Op::EndLayer,
]);
// Create a page with our operations
let page = PdfPage::new(Mm(210.0), Mm(297.0), ops);
// Save the PDF to a file
let bytes = doc
.with_pages(vec![page])
.save(&PdfSaveOptions::default(), &mut Vec::new());
std::fs::write("./layers_example.pdf", bytes).unwrap();
println!("Created layers_example.pdf");
}