2 * Copyright (C) 1999 Michael Zucchi
3 * Copyright (C) 1999 The Free Software Foundation
4 * Copyright (C) 2004 John Ellis
5 * Copyright (C) 2008 - 2016 The Geeqie Team
7 * Authors: Michael Zucchi <zucchi@zedzone.mmc.com.au>
8 * Federico Mena-Quintero <federico@gimp.org>
9 * Michael Fulbright <drmike@redhat.com>
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License along
23 * with this program; if not, write to the Free Software Foundation, Inc.,
24 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
27 /** This is a Will Not Fix */
28 #pragma GCC diagnostic ignored "-Wclobbered"
34 #include "image-load-jpeg.h"
37 #include <cstdio> // for FILE and size_t in jpeglib.h
39 #include <gdk-pixbuf/gdk-pixbuf.h>
40 #include <glib-object.h>
46 #include "image-load.h"
48 #include "jpeg-parser.h"
51 /* error handler data */
52 struct error_handler_data {
53 struct jpeg_error_mgr pub;
54 sigjmp_buf setjmp_buffer;
58 /* explode gray image data from jpeg library into rgb components in pixbuf */
60 explode_gray_into_buf (struct jpeg_decompress_struct *cinfo,
67 g_return_if_fail (cinfo != nullptr);
68 g_return_if_fail (cinfo->output_components == 1);
69 g_return_if_fail (cinfo->out_color_space == JCS_GRAYSCALE);
71 /* Expand grey->colour. Expand from the end of the
72 * memory down, so we can use the same buffer.
74 w = cinfo->output_width;
75 for (i = cinfo->rec_outbuf_height - 1; i >= 0; i--) {
79 from = lines[i] + w - 1;
80 to = lines[i] + (w - 1) * 3;
81 for (j = w - 1; j >= 0; j--) {
93 convert_cmyk_to_rgb (struct jpeg_decompress_struct *cinfo,
99 g_return_if_fail (cinfo != nullptr);
100 g_return_if_fail (cinfo->output_components == 4);
101 g_return_if_fail (cinfo->out_color_space == JCS_CMYK);
103 for (i = cinfo->rec_outbuf_height - 1; i >= 0; i--) {
107 for (j = 0; j < cinfo->output_width; j++) {
116 if (cinfo->saw_Adobe_marker) {
122 p[0] = (255 - k)*(255 - c) / 255;
123 p[1] = (255 - k)*(255 - m) / 255;
124 p[2] = (255 - k)*(255 - y) / 255;
133 void ImageLoaderJpeg::init(AreaUpdatedCb area_updated_cb, SizePreparedCb size_prepared_cb, AreaPreparedCb area_prepared_cb, gpointer data)
135 this->area_updated_cb = area_updated_cb;
136 this->size_prepared_cb = size_prepared_cb;
137 this->area_prepared_cb = area_prepared_cb;
142 fatal_error_handler (j_common_ptr cinfo)
144 struct error_handler_data *errmgr;
145 char buffer[JMSG_LENGTH_MAX];
147 errmgr = reinterpret_cast<struct error_handler_data *>(cinfo->err);
149 /* Create the message */
150 (* cinfo->err->format_message) (cinfo, buffer);
152 /* broken check for *error == NULL for robustness against
153 * crappy JPEG library
155 if (errmgr->error && *errmgr->error == nullptr) {
156 g_set_error (errmgr->error,
158 cinfo->err->msg_code == JERR_OUT_OF_MEMORY
159 ? GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY
160 : GDK_PIXBUF_ERROR_CORRUPT_IMAGE,
161 _("Error interpreting JPEG image file (%s)"),
165 siglongjmp (errmgr->setjmp_buffer, 1);
167 g_assert_not_reached ();
171 output_message_handler (j_common_ptr)
173 /* This method keeps libjpeg from dumping crap to stderr */
179 void image_loader_jpeg_read_scanline(struct jpeg_decompress_struct *cinfo, guchar **dptr, guint rowstride)
186 for (i = 0; i < cinfo->rec_outbuf_height; i++)
192 jpeg_read_scanlines (cinfo, lines, cinfo->rec_outbuf_height);
194 switch (cinfo->out_color_space)
197 explode_gray_into_buf (cinfo, lines);
203 convert_cmyk_to_rgb (cinfo, lines);
211 static void init_source (j_decompress_ptr) {}
212 static boolean fill_input_buffer (j_decompress_ptr cinfo)
214 ERREXIT(cinfo, JERR_INPUT_EMPTY);
217 static void skip_input_data (j_decompress_ptr cinfo, long num_bytes)
219 auto src = static_cast<struct jpeg_source_mgr*>(cinfo->src);
221 if (static_cast<gulong>(num_bytes) > src->bytes_in_buffer)
223 ERREXIT(cinfo, JERR_INPUT_EOF);
225 else if (num_bytes > 0)
227 src->next_input_byte += static_cast<size_t>(num_bytes);
228 src->bytes_in_buffer -= static_cast<size_t>(num_bytes);
231 static void term_source (j_decompress_ptr) {}
232 static void set_mem_src (j_decompress_ptr cinfo, void* buffer, long nbytes)
234 struct jpeg_source_mgr* src;
236 if (cinfo->src == nullptr)
237 { /* first time for this JPEG object? */
238 cinfo->src = static_cast<struct jpeg_source_mgr *>((*cinfo->mem->alloc_small) (
239 reinterpret_cast<j_common_ptr>(cinfo), JPOOL_PERMANENT,
240 sizeof(struct jpeg_source_mgr)));
243 src = static_cast<struct jpeg_source_mgr*>(cinfo->src);
244 src->init_source = init_source;
245 src->fill_input_buffer = fill_input_buffer;
246 src->skip_input_data = skip_input_data;
247 src->resync_to_restart = jpeg_resync_to_restart; /* use default method */
248 src->term_source = term_source;
249 src->bytes_in_buffer = nbytes;
250 src->next_input_byte = static_cast<JOCTET*>(buffer);
254 gboolean ImageLoaderJpeg::write(const guchar *buf, gsize &chunk_size, gsize count, GError **error)
256 struct jpeg_decompress_struct cinfo;
257 struct jpeg_decompress_struct cinfo2;
261 guchar *stereo_buf2 = nullptr;
262 guint stereo_length = 0;
264 struct error_handler_data jerr;
268 MPOData *mpo = jpeg_get_mpo_data(buf, count);
269 if (mpo && mpo->num_images > 1)
276 for (i = 0; i < mpo->num_images; i++)
278 if (mpo->images[i].type_code == 0x20002)
280 if (mpo->images[i].MPIndividualNum == 1)
284 else if (mpo->images[i].MPIndividualNum > num2)
287 num2 = mpo->images[i].MPIndividualNum;
292 if (idx1 >= 0 && idx2 >= 0)
295 stereo_buf2 = const_cast<unsigned char *>(buf) + mpo->images[idx2].offset;
296 stereo_length = mpo->images[idx2].length;
297 buf = const_cast<unsigned char *>(buf) + mpo->images[idx1].offset;
298 count = mpo->images[idx1].length;
301 jpeg_mpo_data_free(mpo);
303 /* setup error handler */
304 cinfo.err = jpeg_std_error (&jerr.pub);
305 if (stereo) cinfo2.err = jpeg_std_error (&jerr.pub);
306 jerr.pub.error_exit = fatal_error_handler;
307 jerr.pub.output_message = output_message_handler;
312 if (sigsetjmp(jerr.setjmp_buffer, 0))
314 /* If we get here, the JPEG code has signaled an error.
315 * We need to clean up the JPEG object, close the input file, and return.
317 jpeg_destroy_decompress(&cinfo);
318 if (stereo) jpeg_destroy_decompress(&cinfo2);
322 jpeg_create_decompress(&cinfo);
324 set_mem_src(&cinfo, const_cast<unsigned char *>(buf), count);
327 jpeg_read_header(&cinfo, TRUE);
331 jpeg_create_decompress(&cinfo2);
332 set_mem_src(&cinfo2, stereo_buf2, stereo_length);
333 jpeg_read_header(&cinfo2, TRUE);
335 if (cinfo.image_width != cinfo2.image_width ||
336 cinfo.image_height != cinfo2.image_height)
338 DEBUG_1("stereo data with different size");
339 jpeg_destroy_decompress(&cinfo2);
345 requested_width = stereo ? cinfo.image_width * 2: cinfo.image_width;
346 requested_height = cinfo.image_height;
347 size_prepared_cb(nullptr, requested_width, requested_height, data);
350 for (cinfo.scale_denom = 2; cinfo.scale_denom <= 8; cinfo.scale_denom *= 2) {
351 jpeg_calc_output_dimensions(&cinfo);
352 if (cinfo.output_width < (stereo ? requested_width / 2 : requested_width) || cinfo.output_height < requested_height) {
353 cinfo.scale_denom /= 2;
357 jpeg_calc_output_dimensions(&cinfo);
360 cinfo2.scale_num = cinfo.scale_num;
361 cinfo2.scale_denom = cinfo.scale_denom;
362 jpeg_calc_output_dimensions(&cinfo2);
363 jpeg_start_decompress(&cinfo2);
367 jpeg_start_decompress(&cinfo);
372 if (cinfo.output_width != cinfo2.output_width ||
373 cinfo.output_height != cinfo2.output_height ||
374 cinfo.out_color_components != cinfo2.out_color_components)
376 DEBUG_1("stereo data with different output size");
377 jpeg_destroy_decompress(&cinfo2);
383 pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB,
384 cinfo.out_color_components == 4 ? TRUE : FALSE,
385 8, stereo ? cinfo.output_width * 2: cinfo.output_width, cinfo.output_height);
389 jpeg_destroy_decompress (&cinfo);
390 if (stereo) jpeg_destroy_decompress (&cinfo2);
393 if (stereo) g_object_set_data(G_OBJECT(pixbuf), "stereo_data", GINT_TO_POINTER(STEREO_PIXBUF_CROSS));
394 area_prepared_cb(nullptr, data);
396 rowstride = gdk_pixbuf_get_rowstride(pixbuf);
397 dptr = gdk_pixbuf_get_pixels(pixbuf);
398 dptr2 = gdk_pixbuf_get_pixels(pixbuf) + ((cinfo.out_color_components == 4) ? 4 * cinfo.output_width : 3 * cinfo.output_width);
401 while (cinfo.output_scanline < cinfo.output_height && !aborted)
403 guint scanline = cinfo.output_scanline;
404 image_loader_jpeg_read_scanline(&cinfo, &dptr, rowstride);
405 area_updated_cb(nullptr, 0, scanline, cinfo.output_width, cinfo.rec_outbuf_height, data);
408 guint scanline = cinfo2.output_scanline;
409 image_loader_jpeg_read_scanline(&cinfo2, &dptr2, rowstride);
410 area_updated_cb(nullptr, cinfo.output_width, scanline, cinfo2.output_width, cinfo2.rec_outbuf_height, data);
414 jpeg_finish_decompress(&cinfo);
415 jpeg_destroy_decompress(&cinfo);
418 jpeg_finish_decompress(&cinfo);
419 jpeg_destroy_decompress(&cinfo);
426 void ImageLoaderJpeg::set_size(int width, int height)
428 requested_width = width;
429 requested_height = height;
432 GdkPixbuf *ImageLoaderJpeg::get_pixbuf()
437 gchar *ImageLoaderJpeg::get_format_name()
439 return g_strdup("jpeg");
442 gchar **ImageLoaderJpeg::get_format_mime_types()
444 static const gchar *mime[] = {"image/jpeg", nullptr};
445 return g_strdupv(const_cast<gchar **>(mime));
448 void ImageLoaderJpeg::abort()
453 ImageLoaderJpeg::~ImageLoaderJpeg()
455 if (pixbuf) g_object_unref(pixbuf);
458 std::unique_ptr<ImageLoaderBackend> get_image_loader_backend_jpeg()
460 return std::make_unique<ImageLoaderJpeg>();
465 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */