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.
23 #include "image-load.h"
24 #include "image-load-j2k.h"
32 struct ImageLoaderJ2K {
33 ImageLoaderBackendCbAreaUpdated area_updated_cb;
34 ImageLoaderBackendCbSize size_cb;
35 ImageLoaderBackendCbAreaPrepared area_prepared_cb;
38 guint requested_width;
39 guint requested_height;
43 static void free_buffer(guchar *pixels, gpointer)
48 struct opj_buffer_info_t {
54 static OPJ_SIZE_T opj_read_from_buffer (void* pdst, OPJ_SIZE_T len, opj_buffer_info_t* psrc)
56 OPJ_SIZE_T n = psrc->buf + psrc->len - psrc->cur;
62 memcpy (pdst, psrc->cur, n);
66 n = static_cast<OPJ_SIZE_T>(-1);
71 static OPJ_SIZE_T opj_write_to_buffer (void* p_buffer, OPJ_SIZE_T p_nb_bytes,
72 opj_buffer_info_t* p_source_buffer)
74 void* pbuf = p_source_buffer->buf;
75 void* pcur = p_source_buffer->cur;
77 OPJ_SIZE_T len = p_source_buffer->len;
82 OPJ_SIZE_T dist = static_cast<guchar *>(pcur) - static_cast<guchar *>(pbuf), n = len - dist;
83 g_assert (dist <= len);
85 while (n < p_nb_bytes) {
90 if (len != p_source_buffer->len) {
94 return static_cast<OPJ_SIZE_T>(-1);
96 if (p_source_buffer->buf) {
97 memcpy (pbuf, p_source_buffer->buf, dist);
98 free (p_source_buffer->buf);
101 p_source_buffer->buf = static_cast<OPJ_BYTE *>(pbuf);
102 p_source_buffer->cur = static_cast<guchar *>(pbuf) + dist;
103 p_source_buffer->len = len;
106 memcpy (p_source_buffer->cur, p_buffer, p_nb_bytes);
107 p_source_buffer->cur += p_nb_bytes;
112 static OPJ_SIZE_T opj_skip_from_buffer (OPJ_SIZE_T len, opj_buffer_info_t* psrc)
114 OPJ_SIZE_T n = psrc->buf + psrc->len - psrc->cur;
123 n = static_cast<OPJ_SIZE_T>(-1);
128 static OPJ_BOOL opj_seek_from_buffer (OPJ_OFF_T len, opj_buffer_info_t* psrc)
130 OPJ_SIZE_T n = psrc->len;
132 if (n > static_cast<gulong>(len))
135 psrc->cur = psrc->buf + n;
140 opj_stream_t* OPJ_CALLCONV opj_stream_create_buffer_stream (opj_buffer_info_t* psrc, OPJ_BOOL input)
145 opj_stream_t* ps = opj_stream_default_create (input);
150 opj_stream_set_user_data (ps, psrc, nullptr);
151 opj_stream_set_user_data_length (ps, psrc->len);
154 opj_stream_set_read_function (
155 ps, reinterpret_cast<opj_stream_read_fn>(opj_read_from_buffer));
157 opj_stream_set_write_function(
158 ps,reinterpret_cast<opj_stream_write_fn>(opj_write_to_buffer));
160 opj_stream_set_skip_function (
161 ps, reinterpret_cast<opj_stream_skip_fn>(opj_skip_from_buffer));
163 opj_stream_set_seek_function (
164 ps, reinterpret_cast<opj_stream_seek_fn>(opj_seek_from_buffer));
169 static gboolean image_loader_j2k_load(gpointer loader, const guchar *buf, gsize count, GError **)
171 auto ld = static_cast<ImageLoaderJ2K *>(loader);
172 opj_stream_t *stream;
174 opj_dparameters_t parameters;
181 gint bytes_per_pixel;
182 opj_buffer_info_t *decode_buffer;
189 buf_copy = static_cast<guchar *>(g_malloc(count));
190 memcpy(buf_copy, buf, count);
192 decode_buffer = g_new0(opj_buffer_info_t, 1);
193 decode_buffer->buf = buf_copy;
194 decode_buffer->len = count;
195 decode_buffer->cur = buf_copy;
197 stream = opj_stream_create_buffer_stream(decode_buffer, OPJ_TRUE);
201 log_printf(_("Could not open file for reading"));
205 if (memcmp(buf_copy + 20, "jp2", 3) == 0)
207 codec = opj_create_decompress(OPJ_CODEC_JP2);
211 log_printf(_("Unknown jpeg2000 decoder type"));
215 opj_set_default_decoder_parameters(¶meters);
216 if (opj_setup_decoder (codec, ¶meters) != OPJ_TRUE)
218 log_printf(_("Couldn't set parameters on decoder for file."));
222 opj_codec_set_threads(codec, get_cpu_cores());
224 if (opj_read_header(stream, codec, &image) != OPJ_TRUE)
226 log_printf(_("Couldn't read JP2 header from file"));
230 if (opj_decode(codec, stream, image) != OPJ_TRUE)
232 log_printf(_("Couldn't decode JP2 image in file"));
236 if (opj_end_decompress(codec, stream) != OPJ_TRUE)
238 log_printf(_("Couldn't decompress JP2 image in file"));
242 num_components = image->numcomps;
243 if (num_components != 3)
245 log_printf(_("JP2 image not rgb"));
249 width = image->comps[0].w;
250 height = image->comps[0].h;
254 pixels = g_new0(guchar, width * bytes_per_pixel * height);
255 for (i = 0; i < height; i++)
257 for (j = 0; j < num_components; j++)
259 for (k = 0; k < width; k++)
261 pixels[(k * bytes_per_pixel + j) + (i * width * bytes_per_pixel)] = image->comps[j].data[i * width + k];
266 ld->pixbuf = gdk_pixbuf_new_from_data(pixels, GDK_COLORSPACE_RGB, FALSE , 8, width, height, width * bytes_per_pixel, free_buffer, nullptr);
268 ld->area_updated_cb(loader, 0, 0, width, height, ld->data);
270 g_free(decode_buffer);
273 opj_image_destroy (image);
275 opj_destroy_codec (codec);
277 opj_stream_destroy (stream);
282 static gpointer image_loader_j2k_new(ImageLoaderBackendCbAreaUpdated area_updated_cb, ImageLoaderBackendCbSize size_cb, ImageLoaderBackendCbAreaPrepared area_prepared_cb, gpointer data)
284 auto loader = g_new0(ImageLoaderJ2K, 1);
285 loader->area_updated_cb = area_updated_cb;
286 loader->size_cb = size_cb;
287 loader->area_prepared_cb = area_prepared_cb;
292 static void image_loader_j2k_set_size(gpointer loader, int width, int height)
294 auto ld = static_cast<ImageLoaderJ2K *>(loader);
295 ld->requested_width = width;
296 ld->requested_height = height;
299 static GdkPixbuf* image_loader_j2k_get_pixbuf(gpointer loader)
301 auto ld = static_cast<ImageLoaderJ2K *>(loader);
305 static gchar* image_loader_j2k_get_format_name(gpointer)
307 return g_strdup("j2k");
310 static gchar** image_loader_j2k_get_format_mime_types(gpointer)
312 static const gchar *mime[] = {"image/jp2", nullptr};
313 return g_strdupv(const_cast<gchar **>(mime));
316 static gboolean image_loader_j2k_close(gpointer, GError **)
321 static void image_loader_j2k_abort(gpointer loader)
323 auto ld = static_cast<ImageLoaderJ2K *>(loader);
327 static void image_loader_j2k_free(gpointer loader)
329 auto ld = static_cast<ImageLoaderJ2K *>(loader);
330 if (ld->pixbuf) g_object_unref(ld->pixbuf);
334 void image_loader_backend_set_j2k(ImageLoaderBackend *funcs)
336 funcs->loader_new = image_loader_j2k_new;
337 funcs->set_size = image_loader_j2k_set_size;
338 funcs->load = image_loader_j2k_load;
339 funcs->write = nullptr;
340 funcs->get_pixbuf = image_loader_j2k_get_pixbuf;
341 funcs->close = image_loader_j2k_close;
342 funcs->abort = image_loader_j2k_abort;
343 funcs->free = image_loader_j2k_free;
344 funcs->get_format_name = image_loader_j2k_get_format_name;
345 funcs->get_format_mime_types = image_loader_j2k_get_format_mime_types;
349 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */