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.
20 #include "dvi-document.h"
21 #include "ev-document-thumbnails.h"
22 #include "ev-document-misc.h"
26 #include "pixbuf-device.h"
29 #include <glib/gi18n.h>
31 GMutex *dvi_context_mutex = NULL;
38 struct _DviDocumentClass
40 GObjectClass parent_class;
45 GObject parent_instance;
51 /* To let document scale we should remember width and height */
59 typedef struct _DviDocumentClass DviDocumentClass;
61 static void dvi_document_do_color_special (DviContext *dvi, const char *prefix, const char *arg);
62 static void dvi_document_document_iface_init (EvDocumentIface *iface);
63 static void dvi_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface);
64 static void dvi_document_get_page_size (EvDocument *document,
69 G_DEFINE_TYPE_WITH_CODE
70 (DviDocument, dvi_document, G_TYPE_OBJECT,
72 G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT, dvi_document_document_iface_init);
73 G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_THUMBNAILS, dvi_document_document_thumbnails_iface_init)
77 dvi_document_load (EvDocument *document,
82 DviDocument *dvi_document = DVI_DOCUMENT(document);
84 filename = g_filename_from_uri (uri, NULL, error);
89 EV_DOCUMENT_ERROR_INVALID,
90 _("File not available"));
94 g_mutex_lock (dvi_context_mutex);
95 if (dvi_document->context)
96 mdvi_destroy_context (dvi_document->context);
98 dvi_document->context = mdvi_init_context(dvi_document->params, dvi_document->spec, filename);
99 g_mutex_unlock (dvi_context_mutex);
101 if (!dvi_document->context) {
104 EV_DOCUMENT_ERROR_INVALID,
105 _("DVI document has incorrect format"));
109 mdvi_pixbuf_device_init (&dvi_document->context->device);
111 dvi_document->base_width = dvi_document->context->dvi_page_w * dvi_document->context->params.conv
112 + 2 * unit2pix(dvi_document->params->dpi, MDVI_HMARGIN) / dvi_document->params->hshrink;
114 dvi_document->base_height = dvi_document->context->dvi_page_h * dvi_document->context->params.vconv
115 + 2 * unit2pix(dvi_document->params->vdpi, MDVI_VMARGIN) / dvi_document->params->vshrink;
117 g_free (dvi_document->uri);
118 dvi_document->uri = g_strdup (uri);
125 dvi_document_save (EvDocument *document,
129 DviDocument *dvi_document = DVI_DOCUMENT (document);
131 return ev_xfer_uri_simple (dvi_document->uri, uri, error);
135 dvi_document_get_n_pages (EvDocument *document)
137 DviDocument *dvi_document = DVI_DOCUMENT (document);
138 return dvi_document->context->npages;
142 dvi_document_get_page_size (EvDocument *document,
147 DviDocument * dvi_document = DVI_DOCUMENT (document);
149 *width = dvi_document->base_width;
150 *height = dvi_document->base_height;;
156 dvi_document_render_pixbuf (EvDocument *document,
160 GdkPixbuf *rotated_pixbuf;
162 DviDocument *dvi_document = DVI_DOCUMENT(document);
164 gint required_width, required_height;
165 gint proposed_width, proposed_height;
166 gint xmargin = 0, ymargin = 0;
168 /* We should protect our context since it's not
169 * thread safe. The work to the future -
170 * let context render page independently
172 g_mutex_lock (dvi_context_mutex);
174 mdvi_setpage(dvi_document->context, rc->page);
176 mdvi_set_shrink (dvi_document->context,
177 (int)((dvi_document->params->hshrink - 1) / rc->scale) + 1,
178 (int)((dvi_document->params->vshrink - 1) / rc->scale) + 1);
180 required_width = dvi_document->base_width * rc->scale;
181 required_height = dvi_document->base_height * rc->scale;
182 proposed_width = dvi_document->context->dvi_page_w * dvi_document->context->params.conv;
183 proposed_height = dvi_document->context->dvi_page_h * dvi_document->context->params.vconv;
185 if (required_width >= proposed_width)
186 xmargin = (required_width - proposed_width) / 2;
187 if (required_height >= proposed_height)
188 ymargin = (required_height - proposed_height) / 2;
190 mdvi_pixbuf_device_set_margins (&dvi_document->context->device, xmargin, ymargin);
192 mdvi_pixbuf_device_render (dvi_document->context);
194 pixbuf = mdvi_pixbuf_device_get_pixbuf (&dvi_document->context->device);
196 g_mutex_unlock (dvi_context_mutex);
198 rotated_pixbuf = gdk_pixbuf_rotate_simple (pixbuf, 360 - rc->rotation);
199 g_object_unref (pixbuf);
201 return rotated_pixbuf;
205 dvi_document_finalize (GObject *object)
207 DviDocument *dvi_document = DVI_DOCUMENT(object);
209 g_mutex_lock (dvi_context_mutex);
210 if (dvi_document->context) {
211 mdvi_pixbuf_device_free (&dvi_document->context->device);
212 mdvi_destroy_context (dvi_document->context);
214 g_mutex_unlock (dvi_context_mutex);
216 if (dvi_document->params)
217 g_free (dvi_document->params);
219 g_free (dvi_document->uri);
221 G_OBJECT_CLASS (dvi_document_parent_class)->finalize (object);
226 dvi_document_class_init (DviDocumentClass *klass)
228 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
230 gobject_class->finalize = dvi_document_finalize;
232 mdvi_init_kpathsea("evince", MDVI_MFMODE, MDVI_FALLBACK_FONT, MDVI_DPI);
233 mdvi_register_special ("Color", "color", NULL, dvi_document_do_color_special, 1);
234 mdvi_register_fonts ();
236 dvi_context_mutex = g_mutex_new ();
240 dvi_document_can_get_text (EvDocument *document)
245 static EvDocumentInfo *
246 dvi_document_get_info (EvDocument *document)
248 EvDocumentInfo *info;
250 info = g_new0 (EvDocumentInfo, 1);
256 dvi_document_document_iface_init (EvDocumentIface *iface)
258 iface->load = dvi_document_load;
259 iface->save = dvi_document_save;
260 iface->can_get_text = dvi_document_can_get_text;
261 iface->get_n_pages = dvi_document_get_n_pages;
262 iface->get_page_size = dvi_document_get_page_size;
263 iface->render_pixbuf = dvi_document_render_pixbuf;
264 iface->get_info = dvi_document_get_info;
268 dvi_document_thumbnails_get_dimensions (EvDocumentThumbnails *document,
273 DviDocument *dvi_document = DVI_DOCUMENT (document);
274 gdouble page_width = dvi_document->base_width;
275 gdouble page_height = dvi_document->base_height;
277 if (rc->rotation == 90 || rc->rotation == 270) {
278 *width = (gint) (page_height * rc->scale);
279 *height = (gint) (page_width * rc->scale);
281 *width = (gint) (page_width * rc->scale);
282 *height = (gint) (page_height * rc->scale);
287 dvi_document_thumbnails_get_thumbnail (EvDocumentThumbnails *document,
291 DviDocument *dvi_document = DVI_DOCUMENT (document);
293 GdkPixbuf *border_pixbuf;
294 GdkPixbuf *rotated_pixbuf;
295 gint thumb_width, thumb_height;
296 gint proposed_width, proposed_height;
298 thumb_width = (gint) (dvi_document->base_width * rc->scale);
299 thumb_height = (gint) (dvi_document->base_height * rc->scale);
301 g_mutex_lock (dvi_context_mutex);
303 mdvi_setpage (dvi_document->context, rc->page);
305 mdvi_set_shrink (dvi_document->context,
306 (int)dvi_document->base_width * dvi_document->params->hshrink / thumb_width,
307 (int)dvi_document->base_height * dvi_document->params->vshrink / thumb_height);
309 proposed_width = dvi_document->context->dvi_page_w * dvi_document->context->params.conv;
310 proposed_height = dvi_document->context->dvi_page_h * dvi_document->context->params.vconv;
313 mdvi_pixbuf_device_set_margins (&dvi_document->context->device,
314 MAX (thumb_width - proposed_width, 0) / 2,
315 MAX (thumb_height - proposed_height, 0) / 2);
317 mdvi_pixbuf_device_set_margins (&dvi_document->context->device,
318 MAX (thumb_width - proposed_width - 2, 0) / 2,
319 MAX (thumb_height - proposed_height - 2, 0) / 2);
323 mdvi_pixbuf_device_render (dvi_document->context);
324 pixbuf = mdvi_pixbuf_device_get_pixbuf (&dvi_document->context->device);
326 g_mutex_unlock (dvi_context_mutex);
328 rotated_pixbuf = gdk_pixbuf_rotate_simple (pixbuf, 360 - rc->rotation);
329 g_object_unref (pixbuf);
332 GdkPixbuf *tmp_pixbuf = rotated_pixbuf;
334 rotated_pixbuf = ev_document_misc_get_thumbnail_frame (-1, -1, tmp_pixbuf);
335 g_object_unref (tmp_pixbuf);
338 return rotated_pixbuf;
342 dvi_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface)
344 iface->get_thumbnail = dvi_document_thumbnails_get_thumbnail;
345 iface->get_dimensions = dvi_document_thumbnails_get_dimensions;
348 #define RGB2ULONG(r,g,b) ((0xFF<<24)|(r<<16)|(g<<8)|(b))
351 hsb2rgb (float h, float s, float v, char *red, char *green, char *blue)
353 float i, f, p, q, t, r, g, b;
357 else if ((h > 360) || (h < 0))
366 q = v * (1 - (s * f));
367 t = v * (1 - (s * (1 - f)));
395 (*red) = (char)floor(r * 255);
396 (*green) = (char)floor(g * 255);
397 (*blue) = (char)floor(b * 255);
403 dvi_document_do_color_special (DviContext *dvi, const char *prefix, const char *arg)
407 if (strncmp (arg, "pop", 3) == 0) {
408 mdvi_pop_color (dvi);
409 } else if (strncmp (arg, "push", 4) == 0) {
410 /* Find color source : Named, CMYK or RGB */
411 const char *tmp = arg+4;
412 while (isspace (*tmp)) tmp++;
414 if (!strncmp ("rgb", tmp, 3)) {
416 unsigned char red, green, blue;
417 sscanf (tmp+4, "%f %f %f", &r, &g, &b);
421 mdvi_push_color (dvi, RGB2ULONG (red, green, blue), 0xFFFFFFFF);
422 } else if (!strncmp ("hsb", tmp, 4)) {
424 char red, green, blue;
425 sscanf (tmp+4, "%f %f %f", &h, &s, &b);
427 if (hsb2rgb (h, s, b, &red, &green, &blue))
428 mdvi_push_color (dvi, RGB2ULONG (red, green, blue), 0xFFFFFFFF);
429 } else if (!strncmp ("cmyk", tmp, 4)) {
430 double r, g, b, c, m, y, k;
432 sscanf (tmp+5, "%f %f %f %f", &c, &m, &y, &k);
443 mdvi_push_color (dvi, RGB2ULONG ((char)(r*255+0.5), (char)(r*255+0.5),
444 (char)(b*255+0.5)), 0xFFFFFFFF);
447 if (gdk_color_parse (tmp, &color))
448 mdvi_push_color (dvi, RGB2ULONG (color.red*255/65535,
449 color.green*255/65535,
450 color.blue*255/65535), 0xFFFFFFFF);
456 dvi_document_init_params (DviDocument *dvi_document)
458 dvi_document->params = g_new0 (DviParams, 1);
460 dvi_document->params->dpi = MDVI_DPI;
461 dvi_document->params->vdpi = MDVI_VDPI;
462 dvi_document->params->mag = MDVI_MAGNIFICATION;
463 dvi_document->params->density = MDVI_DEFAULT_DENSITY;
464 dvi_document->params->gamma = MDVI_DEFAULT_GAMMA;
465 dvi_document->params->flags = MDVI_PARAM_ANTIALIASED;
466 dvi_document->params->hdrift = 0;
467 dvi_document->params->vdrift = 0;
468 dvi_document->params->hshrink = MDVI_SHRINK_FROM_DPI(dvi_document->params->dpi);
469 dvi_document->params->vshrink = MDVI_SHRINK_FROM_DPI(dvi_document->params->vdpi);
470 dvi_document->params->orientation = MDVI_ORIENT_TBLR;
472 dvi_document->spec = NULL;
474 dvi_document->params->bg = 0xffffffff;
475 dvi_document->params->fg = 0xff000000;
479 dvi_document_init (DviDocument *dvi_document)
481 dvi_document->context = NULL;
482 dvi_document_init_params (dvi_document);