2 * Copyright (C) 20019 - The Geeqie Team
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
21 #include "image-load-j2k.h"
26 #include <gdk-pixbuf/gdk-pixbuf.h>
27 #include <glib-object.h>
32 #include "image-load.h"
39 struct ImageLoaderJ2K : public ImageLoaderBackend
42 ~ImageLoaderJ2K() override;
44 void init(AreaUpdatedCb area_updated_cb, SizePreparedCb size_prepared_cb, AreaPreparedCb area_prepared_cb, gpointer data) override;
45 gboolean write(const guchar *buf, gsize &chunk_size, gsize count, GError **error) override;
46 GdkPixbuf *get_pixbuf() override;
47 gchar *get_format_name() override;
48 gchar **get_format_mime_types() override;
51 AreaUpdatedCb area_updated_cb;
57 void free_buffer(guchar *pixels, gpointer)
62 struct opj_buffer_info_t {
68 OPJ_SIZE_T opj_read_from_buffer (void* pdst, OPJ_SIZE_T len, opj_buffer_info_t* psrc)
70 OPJ_SIZE_T n = psrc->buf + psrc->len - psrc->cur;
77 memcpy (pdst, psrc->cur, n);
81 n = static_cast<OPJ_SIZE_T>(-1);
86 OPJ_SIZE_T opj_write_to_buffer (void* p_buffer, OPJ_SIZE_T p_nb_bytes,
87 opj_buffer_info_t* p_source_buffer)
89 void* pbuf = p_source_buffer->buf;
90 void* pcur = p_source_buffer->cur;
92 OPJ_SIZE_T len = p_source_buffer->len;
97 OPJ_SIZE_T dist = static_cast<guchar *>(pcur) - static_cast<guchar *>(pbuf);
98 OPJ_SIZE_T n = len - dist;
99 g_assert (dist <= len);
101 while (n < p_nb_bytes)
107 if (len != p_source_buffer->len)
112 return static_cast<OPJ_SIZE_T>(-1);
114 if (p_source_buffer->buf)
116 memcpy (pbuf, p_source_buffer->buf, dist);
117 free (p_source_buffer->buf);
120 p_source_buffer->buf = static_cast<OPJ_BYTE *>(pbuf);
121 p_source_buffer->cur = static_cast<guchar *>(pbuf) + dist;
122 p_source_buffer->len = len;
125 memcpy (p_source_buffer->cur, p_buffer, p_nb_bytes);
126 p_source_buffer->cur += p_nb_bytes;
131 OPJ_SIZE_T opj_skip_from_buffer (OPJ_SIZE_T len, opj_buffer_info_t* psrc)
133 OPJ_SIZE_T n = psrc->buf + psrc->len - psrc->cur;
143 n = static_cast<OPJ_SIZE_T>(-1);
148 OPJ_BOOL opj_seek_from_buffer (OPJ_OFF_T len, opj_buffer_info_t* psrc)
150 OPJ_SIZE_T n = psrc->len;
152 if (n > static_cast<gulong>(len))
155 psrc->cur = psrc->buf + n;
160 opj_stream_t* OPJ_CALLCONV opj_stream_create_buffer_stream (opj_buffer_info_t* psrc, OPJ_BOOL input)
165 opj_stream_t* ps = opj_stream_default_create (input);
170 opj_stream_set_user_data (ps, psrc, nullptr);
171 opj_stream_set_user_data_length (ps, psrc->len);
174 opj_stream_set_read_function (
175 ps, reinterpret_cast<opj_stream_read_fn>(opj_read_from_buffer));
177 opj_stream_set_write_function(
178 ps,reinterpret_cast<opj_stream_write_fn>(opj_write_to_buffer));
180 opj_stream_set_skip_function (
181 ps, reinterpret_cast<opj_stream_skip_fn>(opj_skip_from_buffer));
183 opj_stream_set_seek_function (
184 ps, reinterpret_cast<opj_stream_seek_fn>(opj_seek_from_buffer));
189 gboolean ImageLoaderJ2K::write(const guchar *buf, gsize &chunk_size, gsize count, GError **)
191 opj_stream_t *stream;
193 opj_dparameters_t parameters;
202 gint bytes_per_pixel;
203 opj_buffer_info_t *decode_buffer;
210 buf_copy = static_cast<guchar *>(g_malloc(count));
211 memcpy(buf_copy, buf, count);
213 decode_buffer = g_new0(opj_buffer_info_t, 1);
214 decode_buffer->buf = buf_copy;
215 decode_buffer->len = count;
216 decode_buffer->cur = buf_copy;
218 stream = opj_stream_create_buffer_stream(decode_buffer, OPJ_TRUE);
222 log_printf(_("Could not open file for reading"));
226 if (memcmp(buf_copy + 20, "jp2", 3) == 0)
228 codec = opj_create_decompress(OPJ_CODEC_JP2);
232 log_printf(_("Unknown jpeg2000 decoder type"));
236 opj_set_default_decoder_parameters(¶meters);
237 if (opj_setup_decoder (codec, ¶meters) != OPJ_TRUE)
239 log_printf(_("Couldn't set parameters on decoder for file."));
243 opj_codec_set_threads(codec, get_cpu_cores());
245 if (opj_read_header(stream, codec, &image) != OPJ_TRUE)
247 log_printf(_("Couldn't read JP2 header from file"));
251 if (opj_decode(codec, stream, image) != OPJ_TRUE)
253 log_printf(_("Couldn't decode JP2 image in file"));
257 if (opj_end_decompress(codec, stream) != OPJ_TRUE)
259 log_printf(_("Couldn't decompress JP2 image in file"));
263 num_components = image->numcomps;
264 if (num_components != 3)
266 log_printf(_("JP2 image not rgb"));
270 width = image->comps[0].w;
271 height = image->comps[0].h;
275 pixels = g_new0(guchar, width * bytes_per_pixel * height);
276 for (i = 0; i < height; i++)
278 for (j = 0; j < num_components; j++)
280 for (k = 0; k < width; k++)
282 pixels[(k * bytes_per_pixel + j) + (i * width * bytes_per_pixel)] = image->comps[j].data[i * width + k];
287 pixbuf = gdk_pixbuf_new_from_data(pixels, GDK_COLORSPACE_RGB, FALSE , 8, width, height, width * bytes_per_pixel, free_buffer, nullptr);
289 area_updated_cb(nullptr, 0, 0, width, height, data);
291 g_free(decode_buffer);
294 opj_image_destroy (image);
296 opj_destroy_codec (codec);
298 opj_stream_destroy (stream);
304 void ImageLoaderJ2K::init(AreaUpdatedCb area_updated_cb, SizePreparedCb, AreaPreparedCb, gpointer data)
306 this->area_updated_cb = area_updated_cb;
310 GdkPixbuf *ImageLoaderJ2K::get_pixbuf()
315 gchar *ImageLoaderJ2K::get_format_name()
317 return g_strdup("j2k");
320 gchar **ImageLoaderJ2K::get_format_mime_types()
322 static const gchar *mime[] = {"image/jp2", nullptr};
323 return g_strdupv(const_cast<gchar **>(mime));
326 ImageLoaderJ2K::~ImageLoaderJ2K()
328 if (pixbuf) g_object_unref(pixbuf);
333 std::unique_ptr<ImageLoaderBackend> get_image_loader_backend_j2k()
335 return std::make_unique<ImageLoaderJ2K>();
338 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */