1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
3 * Copyright (C) 2005, Nickolay V. Shmyrev <nshmyrev@yandex.ru>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2, or (at your option)
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 #include "dvi-document.h"
23 #include "ev-document-thumbnails.h"
24 #include "ev-document-misc.h"
25 #include "ev-file-exporter.h"
26 #include "ev-file-helpers.h"
31 #include "cairo-device.h"
33 #include <glib/gi18n-lib.h>
38 GMutex *dvi_context_mutex = NULL;
45 struct _DviDocumentClass
47 GObjectClass parent_class;
52 GObject parent_instance;
58 /* To let document scale we should remember width and height */
65 gchar *exporter_filename;
66 GString *exporter_opts;
69 typedef struct _DviDocumentClass DviDocumentClass;
71 static void dvi_document_document_iface_init (EvDocumentIface *iface);
72 static void dvi_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface);
73 static void dvi_document_file_exporter_iface_init (EvFileExporterIface *iface);
74 static void dvi_document_do_color_special (DviContext *dvi,
78 EV_BACKEND_REGISTER_WITH_CODE (DviDocument, dvi_document,
80 EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_THUMBNAILS, dvi_document_document_thumbnails_iface_init);
81 EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_FILE_EXPORTER, dvi_document_file_exporter_iface_init);
85 dvi_document_load (EvDocument *document,
90 DviDocument *dvi_document = DVI_DOCUMENT(document);
92 filename = g_filename_from_uri (uri, NULL, error);
96 g_mutex_lock (dvi_context_mutex);
97 if (dvi_document->context)
98 mdvi_destroy_context (dvi_document->context);
100 dvi_document->context = mdvi_init_context(dvi_document->params, dvi_document->spec, filename);
101 g_mutex_unlock (dvi_context_mutex);
104 if (!dvi_document->context) {
105 g_set_error_literal (error,
107 EV_DOCUMENT_ERROR_INVALID,
108 _("DVI document has incorrect format"));
112 mdvi_cairo_device_init (&dvi_document->context->device);
115 dvi_document->base_width = dvi_document->context->dvi_page_w * dvi_document->context->params.conv
116 + 2 * unit2pix(dvi_document->params->dpi, MDVI_HMARGIN) / dvi_document->params->hshrink;
118 dvi_document->base_height = dvi_document->context->dvi_page_h * dvi_document->context->params.vconv
119 + 2 * unit2pix(dvi_document->params->vdpi, MDVI_VMARGIN) / dvi_document->params->vshrink;
121 g_free (dvi_document->uri);
122 dvi_document->uri = g_strdup (uri);
129 dvi_document_save (EvDocument *document,
133 DviDocument *dvi_document = DVI_DOCUMENT (document);
135 return ev_xfer_uri_simple (dvi_document->uri, uri, error);
139 dvi_document_get_n_pages (EvDocument *document)
141 DviDocument *dvi_document = DVI_DOCUMENT (document);
143 return dvi_document->context->npages;
147 dvi_document_get_page_size (EvDocument *document,
152 DviDocument *dvi_document = DVI_DOCUMENT (document);
154 *width = dvi_document->base_width;
155 *height = dvi_document->base_height;;
158 static cairo_surface_t *
159 dvi_document_render (EvDocument *document,
162 cairo_surface_t *surface;
163 cairo_surface_t *rotated_surface;
164 DviDocument *dvi_document = DVI_DOCUMENT(document);
165 gint required_width, required_height;
166 gint proposed_width, proposed_height;
167 gint xmargin = 0, ymargin = 0;
169 /* We should protect our context since it's not
170 * thread safe. The work to the future -
171 * let context render page independently
173 g_mutex_lock (dvi_context_mutex);
175 mdvi_setpage (dvi_document->context, rc->page->index);
177 mdvi_set_shrink (dvi_document->context,
178 (int)((dvi_document->params->hshrink - 1) / rc->scale) + 1,
179 (int)((dvi_document->params->vshrink - 1) / rc->scale) + 1);
181 required_width = dvi_document->base_width * rc->scale + 0.5;
182 required_height = dvi_document->base_height * rc->scale + 0.5;
183 proposed_width = dvi_document->context->dvi_page_w * dvi_document->context->params.conv;
184 proposed_height = dvi_document->context->dvi_page_h * dvi_document->context->params.vconv;
186 if (required_width >= proposed_width)
187 xmargin = (required_width - proposed_width) / 2;
188 if (required_height >= proposed_height)
189 ymargin = (required_height - proposed_height) / 2;
191 mdvi_cairo_device_set_margins (&dvi_document->context->device, xmargin, ymargin);
192 mdvi_cairo_device_set_scale (&dvi_document->context->device, rc->scale);
193 mdvi_cairo_device_render (dvi_document->context);
194 surface = mdvi_cairo_device_get_surface (&dvi_document->context->device);
196 g_mutex_unlock (dvi_context_mutex);
198 rotated_surface = ev_document_misc_surface_rotate_and_scale (surface,
202 cairo_surface_destroy (surface);
204 return rotated_surface;
208 dvi_document_finalize (GObject *object)
210 DviDocument *dvi_document = DVI_DOCUMENT(object);
212 g_mutex_lock (dvi_context_mutex);
213 if (dvi_document->context) {
214 mdvi_cairo_device_free (&dvi_document->context->device);
215 mdvi_destroy_context (dvi_document->context);
217 g_mutex_unlock (dvi_context_mutex);
219 if (dvi_document->params)
220 g_free (dvi_document->params);
222 if (dvi_document->exporter_filename)
223 g_free (dvi_document->exporter_filename);
225 if (dvi_document->exporter_opts)
226 g_string_free (dvi_document->exporter_opts, TRUE);
228 g_free (dvi_document->uri);
230 G_OBJECT_CLASS (dvi_document_parent_class)->finalize (object);
235 dvi_document_class_init (DviDocumentClass *klass)
237 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
239 gobject_class->finalize = dvi_document_finalize;
241 mdvi_init_kpathsea ("evince", MDVI_MFMODE, MDVI_FALLBACK_FONT, MDVI_DPI);
242 mdvi_register_special ("Color", "color", NULL, dvi_document_do_color_special, 1);
243 mdvi_register_fonts ();
245 dvi_context_mutex = g_mutex_new ();
248 static EvDocumentInfo *
249 dvi_document_get_info (EvDocument *document)
251 EvDocumentInfo *info;
253 info = g_new0 (EvDocumentInfo, 1);
259 dvi_document_document_iface_init (EvDocumentIface *iface)
261 iface->load = dvi_document_load;
262 iface->save = dvi_document_save;
263 iface->get_n_pages = dvi_document_get_n_pages;
264 iface->get_page_size = dvi_document_get_page_size;
265 iface->render = dvi_document_render;
266 iface->get_info = dvi_document_get_info;
270 dvi_document_thumbnails_get_dimensions (EvDocumentThumbnails *document,
275 DviDocument *dvi_document = DVI_DOCUMENT (document);
276 gdouble page_width = dvi_document->base_width;
277 gdouble page_height = dvi_document->base_height;
279 if (rc->rotation == 90 || rc->rotation == 270) {
280 *width = (gint) (page_height * rc->scale);
281 *height = (gint) (page_width * rc->scale);
283 *width = (gint) (page_width * rc->scale);
284 *height = (gint) (page_height * rc->scale);
289 dvi_document_thumbnails_get_thumbnail (EvDocumentThumbnails *document,
293 DviDocument *dvi_document = DVI_DOCUMENT (document);
295 GdkPixbuf *rotated_pixbuf;
296 cairo_surface_t *surface;
297 gint thumb_width, thumb_height;
298 gint proposed_width, proposed_height;
300 thumb_width = (gint) (dvi_document->base_width * rc->scale);
301 thumb_height = (gint) (dvi_document->base_height * rc->scale);
303 g_mutex_lock (dvi_context_mutex);
305 mdvi_setpage (dvi_document->context, rc->page->index);
307 mdvi_set_shrink (dvi_document->context,
308 (int)dvi_document->base_width * dvi_document->params->hshrink / thumb_width,
309 (int)dvi_document->base_height * dvi_document->params->vshrink / thumb_height);
311 proposed_width = dvi_document->context->dvi_page_w * dvi_document->context->params.conv;
312 proposed_height = dvi_document->context->dvi_page_h * dvi_document->context->params.vconv;
315 mdvi_cairo_device_set_margins (&dvi_document->context->device,
316 MAX (thumb_width - proposed_width, 0) / 2,
317 MAX (thumb_height - proposed_height, 0) / 2);
319 mdvi_cairo_device_set_margins (&dvi_document->context->device,
320 MAX (thumb_width - proposed_width - 2, 0) / 2,
321 MAX (thumb_height - proposed_height - 2, 0) / 2);
324 mdvi_cairo_device_set_scale (&dvi_document->context->device, rc->scale);
325 mdvi_cairo_device_render (dvi_document->context);
326 surface = mdvi_cairo_device_get_surface (&dvi_document->context->device);
327 g_mutex_unlock (dvi_context_mutex);
329 pixbuf = ev_document_misc_pixbuf_from_surface (surface);
330 cairo_surface_destroy (surface);
332 rotated_pixbuf = gdk_pixbuf_rotate_simple (pixbuf, 360 - rc->rotation);
333 g_object_unref (pixbuf);
336 GdkPixbuf *tmp_pixbuf = rotated_pixbuf;
338 rotated_pixbuf = ev_document_misc_get_thumbnail_frame (-1, -1, tmp_pixbuf);
339 g_object_unref (tmp_pixbuf);
342 return rotated_pixbuf;
346 dvi_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface)
348 iface->get_thumbnail = dvi_document_thumbnails_get_thumbnail;
349 iface->get_dimensions = dvi_document_thumbnails_get_dimensions;
352 /* EvFileExporterIface */
354 dvi_document_file_exporter_begin (EvFileExporter *exporter,
355 EvFileExporterContext *fc)
357 DviDocument *dvi_document = DVI_DOCUMENT(exporter);
359 if (dvi_document->exporter_filename)
360 g_free (dvi_document->exporter_filename);
361 dvi_document->exporter_filename = g_strdup (fc->filename);
363 if (dvi_document->exporter_opts) {
364 g_string_free (dvi_document->exporter_opts, TRUE);
366 dvi_document->exporter_opts = g_string_new ("-s ");
370 dvi_document_file_exporter_do_page (EvFileExporter *exporter,
373 DviDocument *dvi_document = DVI_DOCUMENT(exporter);
375 g_string_append_printf (dvi_document->exporter_opts, "%d,", (rc->page->index) + 1);
379 dvi_document_file_exporter_end (EvFileExporter *exporter)
386 DviDocument *dvi_document = DVI_DOCUMENT(exporter);
388 command_line = g_strdup_printf ("dvipdfm %s -o %s \"%s\"", /* dvipdfm -s 1,2,.., -o exporter_filename dvi_filename */
389 dvi_document->exporter_opts->str,
390 dvi_document->exporter_filename,
391 dvi_document->context->filename);
393 success = g_spawn_command_line_sync (command_line,
399 g_free (command_line);
401 if (success == FALSE) {
402 g_warning ("Error: %s", err->message);
403 } else if (!WIFEXITED(exit_stat) || WEXITSTATUS(exit_stat) != EXIT_SUCCESS){
404 g_warning ("Error: dvipdfm does not end normally or exit with a failure status.");
411 static EvFileExporterCapabilities
412 dvi_document_file_exporter_get_capabilities (EvFileExporter *exporter)
414 return EV_FILE_EXPORTER_CAN_PAGE_SET |
415 EV_FILE_EXPORTER_CAN_COPIES |
416 EV_FILE_EXPORTER_CAN_COLLATE |
417 EV_FILE_EXPORTER_CAN_REVERSE |
418 EV_FILE_EXPORTER_CAN_GENERATE_PDF;
422 dvi_document_file_exporter_iface_init (EvFileExporterIface *iface)
424 iface->begin = dvi_document_file_exporter_begin;
425 iface->do_page = dvi_document_file_exporter_do_page;
426 iface->end = dvi_document_file_exporter_end;
427 iface->get_capabilities = dvi_document_file_exporter_get_capabilities;
430 #define RGB2ULONG(r,g,b) ((0xFF<<24)|(r<<16)|(g<<8)|(b))
433 hsb2rgb (float h, float s, float v, guchar *red, guchar *green, guchar *blue)
435 float i, f, p, q, t, r, g, b;
439 else if ((h > 360) || (h < 0))
448 q = v * (1 - (s * f));
449 t = v * (1 - (s * (1 - f)));
477 *red = (guchar)floor(r * 255.0);
478 *green = (guchar)floor(g * 255.0);
479 *blue = (guchar)floor(b * 255.0);
485 parse_color (const gchar *ptr,
489 gchar *p = (gchar *)ptr;
492 for (i = 0; i < n_color; i++) {
493 while (isspace (*p)) p++;
494 color[i] = g_ascii_strtod (p, NULL);
495 while (!isspace (*p) && *p != '\0') p++;
502 dvi_document_do_color_special (DviContext *dvi, const char *prefix, const char *arg)
504 if (strncmp (arg, "pop", 3) == 0) {
505 mdvi_pop_color (dvi);
506 } else if (strncmp (arg, "push", 4) == 0) {
507 /* Find color source: Named, CMYK or RGB */
508 const char *tmp = arg + 4;
510 while (isspace (*tmp)) tmp++;
512 if (!strncmp ("rgb", tmp, 3)) {
514 guchar red, green, blue;
516 parse_color (tmp + 4, rgb, 3);
519 green = 255 * rgb[1];
522 mdvi_push_color (dvi, RGB2ULONG (red, green, blue), 0xFFFFFFFF);
523 } else if (!strncmp ("hsb", tmp, 4)) {
525 guchar red, green, blue;
527 parse_color (tmp + 4, hsb, 3);
529 if (hsb2rgb (hsb[0], hsb[1], hsb[2], &red, &green, &blue))
530 mdvi_push_color (dvi, RGB2ULONG (red, green, blue), 0xFFFFFFFF);
531 } else if (!strncmp ("cmyk", tmp, 4)) {
534 guchar red, green, blue;
536 parse_color (tmp + 5, cmyk, 4);
538 r = 1.0 - cmyk[0] - cmyk[3];
541 g = 1.0 - cmyk[1] - cmyk[3];
544 b = 1.0 - cmyk[2] - cmyk[3];
549 green = g * 255 + 0.5;
550 blue = b * 255 + 0.5;
552 mdvi_push_color (dvi, RGB2ULONG (red, green, blue), 0xFFFFFFFF);
553 } else if (!strncmp ("gray ", tmp, 5)) {
557 parse_color (tmp + 5, &gray, 1);
559 rgb = gray * 255 + 0.5;
561 mdvi_push_color (dvi, RGB2ULONG (rgb, rgb, rgb), 0xFFFFFFFF);
565 if (gdk_color_parse (tmp, &color)) {
566 guchar red, green, blue;
568 red = color.red * 255 / 65535.;
569 green = color.green * 255 / 65535.;
570 blue = color.blue * 255 / 65535.;
572 mdvi_push_color (dvi, RGB2ULONG (red, green, blue), 0xFFFFFFFF);
579 dvi_document_init_params (DviDocument *dvi_document)
581 dvi_document->params = g_new0 (DviParams, 1);
583 dvi_document->params->dpi = MDVI_DPI;
584 dvi_document->params->vdpi = MDVI_VDPI;
585 dvi_document->params->mag = MDVI_MAGNIFICATION;
586 dvi_document->params->density = MDVI_DEFAULT_DENSITY;
587 dvi_document->params->gamma = MDVI_DEFAULT_GAMMA;
588 dvi_document->params->flags = MDVI_PARAM_ANTIALIASED;
589 dvi_document->params->hdrift = 0;
590 dvi_document->params->vdrift = 0;
591 dvi_document->params->hshrink = MDVI_SHRINK_FROM_DPI(dvi_document->params->dpi);
592 dvi_document->params->vshrink = MDVI_SHRINK_FROM_DPI(dvi_document->params->vdpi);
593 dvi_document->params->orientation = MDVI_ORIENT_TBLR;
595 dvi_document->spec = NULL;
597 dvi_document->params->bg = 0xffffffff;
598 dvi_document->params->fg = 0xff000000;
602 dvi_document_init (DviDocument *dvi_document)
604 dvi_document->context = NULL;
605 dvi_document_init_params (dvi_document);
607 dvi_document->exporter_filename = NULL;
608 dvi_document->exporter_opts = NULL;