Mercurial > hgrepos > Python2 > PyMuPDF

comparison mupdf-source/platform/java/example/Example.java @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1:1d09e1dec1d9 2:b50eed0cc0ef
1 // Copyright (C) 2022 Artifex Software, Inc.
2 //
3 // This file is part of MuPDF.
4 //
5 // MuPDF is free software: you can redistribute it and/or modify it under the
6 // terms of the GNU Affero General Public License as published by the Free
7 // Software Foundation, either version 3 of the License, or (at your option)
8 // any later version.
9 //
10 // MuPDF is distributed in the hope that it will be useful, but WITHOUT ANY
11 // WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
12 // FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
13 // details.
14 //
15 // You should have received a copy of the GNU Affero General Public License
16 // along with MuPDF. If not, see <https://www.gnu.org/licenses/agpl-3.0.en.html>
17 //
18 // Alternative licensing terms are available from the licensor.
19 // For commercial licensing, see <https://www.artifex.com/> or contact
20 // Artifex Software, Inc., 39 Mesa Street, Suite 108A, San Francisco,
21 // CA 94129, USA, for further information.
22
23 /**
24 * Render a page from a document at given zoom and rotation.
25 *
26 * To build this example in a source tree:
27 * make -C platform/java examples
28 *
29 * To render page 2 from a document (at 100% without rotation)
30 * and output the result as PNM to stdout, run:
31 * java -classpath build/java/debug -Djava.library.path=build/java/debug \
32 * example.Example document.pdf 2
33 *
34 * For 150% size with 90 degree rotation, pass two more arguments:
35 * java -classpath build/java/debug -Djava.library.path=build/java/debug \
36 * example.Example document.pdf 2 150 90
37 */
38
39 package example;
40
41 /* Import all MuPDF java classes. */
42 import com.artifex.mupdf.fitz.*;
43
44 class Example
45 {
46 public static void main(String args[])
47 {
48 /* Parse arguments. */
49 if (args.length < 2)
50 {
51 System.err.println("usage: Example input-file page-number [ zoom [ rotate] ]");
52 System.err.println("\tinput-file: path of PDF, XPS, CBZ or EPUB document to open");
53 System.err.println("\tPage numbering starts from one.");
54 System.err.println("\tZoom level is in percent (100 percent is 72 dpi).");
55 System.err.println("\tRotation is in degrees clockwise.");
56 return;
57 }
58
59 String filename = args[0];
60 int pageNumber = Integer.parseInt(args[1]) - 1;
61 float zoom = 100;
62 if (args.length >= 3)
63 zoom = Float.parseFloat(args[2]);
64 float rotate = 0;
65 if (args.length >= 4)
66 rotate = Float.parseFloat(args[3]);
67
68 /* Open document using path. */
69 Document doc;
70 try {
71 doc = Document.openDocument(filename);
72 } catch (RuntimeException e) {
73 System.err.println("Error opening document: " + e);
74 return;
75 }
76
77 /* Count the number of pages. */
78 int pageCount;
79 try {
80 pageCount = doc.countPages();
81 } catch (RuntimeException e) {
82 System.err.println("Error counting number of pages: " + e);
83 return;
84 }
85
86 /* Check that the desired page is in range. */
87 if (pageNumber < 0 || pageNumber >= pageCount)
88 {
89 System.err.println("Page number out of range: " + pageNumber + " (page count " + pageCount + ")");
90 return;
91 }
92
93 /* Load the desired page from the document. */
94 Page page;
95 try {
96 page = doc.loadPage(pageNumber);
97 } catch (RuntimeException e) {
98 System.err.println("Error loading page " + (pageNumber + 1) + ": " + e);
99 return;
100 }
101
102 /* Create a transformation matrix based on
103 * zoom factor and rotation supplied by user.
104 */
105 Matrix ctm = Matrix.Scale(zoom / 100);
106 ctm.concat(Matrix.Rotate(rotate));
107
108 /* Render page to an RGB pixmap without transparency. */
109 Pixmap pixmap = null;
110 try {
111 pixmap = page.toPixmap(ctm, ColorSpace.DeviceRGB, false, true);
112 } catch (RuntimeException e) {
113 System.err.println("Error loading page " + (pageNumber + 1) + ": " + e);
114 return;
115 }
116
117 /* Output RGB pixmap to PNM image. */
118 System.out.println("P3");
119 System.out.println(pixmap.getWidth() + " " + pixmap.getHeight());
120 System.out.println("255");
121 for (int y = 0; y < pixmap.getHeight(); y++)
122 {
123 for (int x = 0; x < pixmap.getWidth(); x++)
124 {
125 int r = ((int) pixmap.getSample(x, y, 0)) & 0xff;
126 int g = ((int) pixmap.getSample(x, y, 1)) & 0xff;
127 int b = ((int) pixmap.getSample(x, y, 2)) & 0xff;
128 if (x == 0)
129 System.out.format("%3d %3d %3d", r, g, b);
130 else
131 System.out.format(" %3d %3d %3d", r, g, b);
132 }
133 System.out.println("");
134 }
135 }
136 }