Panda3D

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imageInfo.cxx
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1/**
2 * PANDA 3D SOFTWARE
3 * Copyright (c) Carnegie Mellon University. All rights reserved.
4 *
5 * All use of this software is subject to the terms of the revised BSD
6 * license. You should have received a copy of this license along
7 * with this source code in a file named "LICENSE."
8 *
9 * @file imageInfo.cxx
10 * @author drose
11 * @date 2003-03-13
12 */
13
14#include "imageInfo.h"
15#include "pnmImageHeader.h"
16
17/**
18 *
19 */
20ImageInfo::
21ImageInfo() {
22 set_program_brief("report the size of image files");
23 set_program_description
24 ("This program reads the headers of a series of one or more "
25 "image files and reports the image sizes to standard output.");
26
27 add_option
28 ("2", "", 0,
29 "Report only images that have a non-power-of-two size in either "
30 "dimension. Images whose dimensions are both a power of two will "
31 "not be mentioned.",
32 &ImageInfo::dispatch_none, &_report_power_2, nullptr);
33}
34
35/**
36 *
37 */
38 void ImageInfo::
39run() {
40 Args::const_iterator ai;
41 for (ai = _filenames.begin(); ai != _filenames.end(); ++ai) {
42 Filename filename = (*ai);
43 PNMImageHeader header;
44 if (!header.read_header(filename)) {
45 // Could not read the image header.
46 if (filename.exists()) {
47 nout << filename << ": could not read image.\n";
48 } else {
49 nout << filename << ": does not exist.\n";
50 }
51 } else {
52 // Successfully read the image header.
53 if (!_report_power_2 ||
54 !is_power_2(header.get_x_size()) ||
55 !is_power_2(header.get_y_size())) {
56 nout << filename << ": " << header.get_x_size() << " x "
57 << header.get_y_size() << " x " << header.get_num_channels()
58 << " (maxval = " << header.get_maxval() << ")\n";
59 }
60 }
61 }
62}
63
64/**
65 * Does something with the additional arguments on the command line (after all
66 * the -options have been parsed). Returns true if the arguments are good,
67 * false otherwise.
68 */
69 bool ImageInfo::
70handle_args(ProgramBase::Args &args) {
71 if (args.empty()) {
72 nout << "List one or more image filenames on command line.\n";
73 return false;
74 }
75 _filenames = args;
76
77 return true;
78}
79
80/**
81 * Returns true if the indicated value is a power of 2, false otherwise.
82 */
83 bool ImageInfo::
84is_power_2(int value) const {
85 return (value & (value - 1)) == 0;
86}
87
88
89 int main(int argc, char *argv[]) {
90 ImageInfo prog;
91 prog.parse_command_line(argc, argv);
92 prog.run();
93 return 0;
94}
Filename::exists
bool exists() const
Returns true if the filename exists on the physical disk, false otherwise.
Definition filename.cxx:1270
ImageInfo
This program reads the headers of a series of one or more images and reports their sizes to standard ...
Definition imageInfo.h:25
PNMImageHeader::read_header
bool read_header(const Filename &filename, PNMFileType *type=nullptr, bool report_unknown_type=true)
Opens up the image file and tries to read its header information to determine its size,...
Definition pnmImageHeader.cxx:33
PNMImageHeader::get_maxval
get_maxval
Returns the maximum channel value allowable for any pixel in this image; for instance,...
Definition pnmImageHeader.h:70
PNMImageHeader::get_x_size
int get_x_size() const
Returns the number of pixels in the X direction.
Definition pnmImageHeader.I:144
PNMImageHeader::get_num_channels
get_num_channels
Returns the number of channels in the image.
Definition pnmImageHeader.h:60
PNMImageHeader::get_y_size
int get_y_size() const
Returns the number of pixels in the Y direction.
Definition pnmImageHeader.I:153
ProgramBase::parse_command_line
virtual void parse_command_line(int argc, char **argv)
Dispatches on each of the options on the command line, and passes the remaining parameters to handle_...
Definition programBase.cxx:286
imageInfo.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
pnmImageHeader.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.