2 Copyright (C) 2012-2015 Carl Hetherington <cth@carlh.net>
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 /** @file src/openjpeg_image.cc
21 * @brief OpenJPEGImage class.
24 #include "openjpeg_image.h"
25 #include "dcp_assert.h"
30 /** Construct an OpenJPEGImage, taking ownership of the opj_image_t */
31 OpenJPEGImage::OpenJPEGImage (opj_image_t* image)
34 DCP_ASSERT (_opj_image->numcomps == 3);
37 /** Construct a new OpenJPEGImage with undefined contents.
38 * @param size Size for the frame in pixels.
40 OpenJPEGImage::OpenJPEGImage (Size size)
42 opj_image_cmptparm_t cmptparm[3];
44 for (int i = 0; i < 3; ++i) {
47 cmptparm[i].w = size.width;
48 cmptparm[i].h = size.height;
51 cmptparm[i].prec = 12;
56 /* XXX: is this _SRGB right? */
57 _opj_image = opj_image_create (3, &cmptparm[0], CLRSPC_SRGB);
58 if (_opj_image == 0) {
59 throw std::runtime_error ("could not create libopenjpeg image");
64 _opj_image->x1 = size.width;
65 _opj_image->y1 = size.height;
68 /** OpenJPEGImage destructor */
69 OpenJPEGImage::~OpenJPEGImage ()
71 opj_image_destroy (_opj_image);
74 /** @param c Component index (0, 1 or 2)
75 * @return Pointer to the data for component c.
78 OpenJPEGImage::data (int c) const
80 DCP_ASSERT (c >= 0 && c < 3);
81 return _opj_image->comps[c].data;
84 /** @return Size of the image in pixels */
86 OpenJPEGImage::size () const
88 /* XXX: this may not be right; x0 and y0 can presumably be non-zero */
89 return dcp::Size (_opj_image->x1, _opj_image->y1);