1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
3 * Copyright (C) 2005, Jonathan Blandford <jrb@gnome.org>
4 * Copyright (C) 2005, Bastien Nocera <hadess@hadess.net>
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, or (at your option)
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
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
25 #include <glib/gi18n-lib.h>
29 #include "impress-document.h"
31 #include "ev-document-misc.h"
32 #include "ev-document-thumbnails.h"
34 struct _ImpressDocumentClass
36 EvDocumentClass parent_class;
39 struct _ImpressDocument
41 EvDocument parent_instance;
49 PangoContext *pango_ctx;
51 /* Only used while rendering inside the mainloop */
57 #define PAGE_WIDTH 1024
58 #define PAGE_HEIGHT 768
60 typedef struct _ImpressDocumentClass ImpressDocumentClass;
62 static void impress_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface);
64 EV_BACKEND_REGISTER_WITH_CODE (ImpressDocument, impress_document,
66 EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_THUMBNAILS,
67 impress_document_document_thumbnails_iface_init);
72 imp_render_draw_bezier_real (GdkDrawable *d, GdkGC *gc, int x0, int y0, int x1, int y1, int x2, int y2, int x3, int y3)
75 int ax, bx, cx, ay, by, cy;
82 bx = 3 * (x2 - x1) - cx;
83 ax = x3 - x0 - cx - bx;
85 by = 3 * (y2 - y1) - cy;
86 ay = y3 - y0 - cy - by;
88 for (t = 0; t < 1; t += 0.01) {
91 nx = ax * t3 + bx * t2 + cx * t + x0;
92 ny = ay * t3 + by * t2 + cy * t + y0;
93 gdk_draw_line (d, gc, x, y, nx, ny);
100 imp_render_get_size(void *drw_data, int *w, int *h)
102 ImpressDocument *impress_document = IMPRESS_DOCUMENT (drw_data);
104 gdk_drawable_get_size(impress_document->pixmap, w, h);
108 imp_render_set_fg_color(void *drw_data, ImpColor *color)
110 ImpressDocument *impress_document = IMPRESS_DOCUMENT (drw_data);
114 c.green = color->green;
115 c.blue = color->blue;
116 gdk_gc_set_rgb_fg_color(impress_document->gc, &c);
120 imp_render_draw_line(void *drw_data, int x1, int y1, int x2, int y2)
122 ImpressDocument *impress_document = IMPRESS_DOCUMENT (drw_data);
124 gdk_draw_line(impress_document->pixmap, impress_document->gc, x1, y1, x2, y2);
128 imp_render_draw_rect(void *drw_data, int fill, int x, int y, int w, int h)
130 ImpressDocument *impress_document = IMPRESS_DOCUMENT (drw_data);
132 gdk_draw_rectangle(impress_document->pixmap, impress_document->gc, fill, x, y, w, h);
136 imp_render_draw_polygon(void *drw_data, int fill, ImpPoint *pts, int nr_pts)
138 ImpressDocument *impress_document = IMPRESS_DOCUMENT (drw_data);
140 gdk_draw_polygon(impress_document->pixmap, impress_document->gc, fill, (GdkPoint *)pts, nr_pts);
144 imp_render_draw_arc(void *drw_data, int fill, int x, int y, int w, int h, int sa, int ea)
146 ImpressDocument *impress_document = IMPRESS_DOCUMENT (drw_data);
148 gdk_draw_arc(impress_document->pixmap, impress_document->gc, fill, x, y, w, h, sa * 64, ea * 64);
152 imp_render_draw_bezier(void *drw_data, int x0, int y0, int x1, int y1, int x2, int y2, int x3, int y3)
154 ImpressDocument *impress_document = IMPRESS_DOCUMENT (drw_data);
156 imp_render_draw_bezier_real (impress_document->pixmap, impress_document->gc, x0, y0, x1, y1, x2, y2, x3, y3);
160 imp_render_open_image(void *drw_data, const unsigned char *pix, size_t size)
162 GdkPixbufLoader *gpl;
165 gpl = gdk_pixbuf_loader_new();
166 gdk_pixbuf_loader_write(gpl, pix, size, NULL);
167 gdk_pixbuf_loader_close(gpl, NULL);
168 pb = gdk_pixbuf_loader_get_pixbuf(gpl);
173 imp_render_get_image_size(void *drw_data, void *img_data, int *w, int *h)
175 GdkPixbuf *pb = (GdkPixbuf *) img_data;
177 *w = gdk_pixbuf_get_width(pb);
178 *h = gdk_pixbuf_get_height(pb);
182 imp_render_scale_image(void *drw_data, void *img_data, int w, int h)
184 GdkPixbuf *pb = (GdkPixbuf *) img_data;
186 return gdk_pixbuf_scale_simple(pb, w, h, GDK_INTERP_BILINEAR);
190 imp_render_draw_image(void *drw_data, void *img_data, int x, int y, int w, int h)
192 ImpressDocument *impress_document = IMPRESS_DOCUMENT (drw_data);
193 GdkPixbuf *pb = (GdkPixbuf *) img_data;
195 gdk_draw_pixbuf(impress_document->pixmap, impress_document->gc, pb, 0, 0, x, y, w, h, GDK_RGB_DITHER_NONE, 0, 0);
199 imp_render_close_image(void *drw_data, void *img_data)
201 GdkPixbuf *pb = (GdkPixbuf *) img_data;
203 g_object_unref(G_OBJECT(pb));
207 imp_render_markup(const char *text, size_t len, int styles, int size)
209 double scr_mm, scr_px, dpi;
214 scr_mm = gdk_screen_get_height_mm(gdk_screen_get_default());
215 scr_px = gdk_screen_get_height(gdk_screen_get_default());
216 dpi = (scr_px / scr_mm) * 25.4;
217 sz = (int) ((double) size * 72.0 * PANGO_SCALE / dpi);
218 esc = g_markup_escape_text(text, len);
219 ret = g_strdup_printf("<span size ='%d'>%s</span>", sz, esc);
225 imp_render_get_text_size(void *drw_data, const char *text, size_t len, int size, int styles, int *w, int *h)
227 ImpressDocument *impress_document = IMPRESS_DOCUMENT (drw_data);
232 g_return_if_fail (impress_document->pango_ctx != NULL);
234 lay = pango_layout_new(impress_document->pango_ctx);
235 m = imp_render_markup(text, len, styles, size);
236 pango_layout_set_markup(lay, m, strlen(m));
237 pango_layout_get_size(lay, &pw, &ph);
240 *w = pw / PANGO_SCALE;
241 *h = ph / PANGO_SCALE;
245 imp_render_draw_text(void *drw_data, int x, int y, const char *text, size_t len, int size, int styles)
247 ImpressDocument *impress_document = IMPRESS_DOCUMENT (drw_data);
251 g_return_if_fail (impress_document->pango_ctx != NULL);
253 lay = pango_layout_new(impress_document->pango_ctx);
254 m = imp_render_markup(text, len, styles, size);
255 pango_layout_set_markup(lay, m, strlen(m));
256 gdk_draw_layout(impress_document->pixmap, impress_document->gc, x, y, lay);
261 static const ImpDrawer imp_render_functions = {
263 imp_render_set_fg_color,
264 imp_render_draw_line,
265 imp_render_draw_rect,
266 imp_render_draw_polygon,
268 imp_render_draw_bezier,
269 imp_render_open_image,
270 imp_render_get_image_size,
271 imp_render_scale_image,
272 imp_render_draw_image,
273 imp_render_close_image,
274 imp_render_get_text_size,
278 /* Document interface */
280 impress_document_load (EvDocument *document,
284 ImpressDocument *impress_document = IMPRESS_DOCUMENT (document);
289 /* FIXME: Could we actually load uris ? */
290 filename = g_filename_from_uri (uri, NULL, error);
294 imp = imp_open (filename, &err);
299 g_set_error_literal (error,
301 EV_DOCUMENT_ERROR_INVALID,
302 _("Invalid document"));
305 impress_document->imp = imp;
311 impress_document_save (EvDocument *document,
315 g_set_error_literal (error,
317 EV_DOCUMENT_ERROR_INVALID,
323 impress_document_get_n_pages (EvDocument *document)
325 ImpressDocument *impress_document = IMPRESS_DOCUMENT (document);
327 g_return_val_if_fail (IMPRESS_IS_DOCUMENT (document), 0);
328 g_return_val_if_fail (impress_document->imp != NULL, 0);
330 return imp_nr_pages (impress_document->imp);
334 impress_document_get_page_size (EvDocument *document,
339 ImpressDocument *impress_document = IMPRESS_DOCUMENT (document);
341 g_return_if_fail (IMPRESS_IS_DOCUMENT (document));
342 g_return_if_fail (impress_document->imp != NULL);
346 *height = PAGE_HEIGHT;
350 imp_render_get_from_drawable (ImpressDocument *impress_document)
354 page = imp_get_page (impress_document->imp, impress_document->pagenum);
356 g_return_val_if_fail (page != NULL, FALSE);
358 ev_document_doc_mutex_lock ();
359 imp_context_set_page (impress_document->ctx, page);
360 imp_render (impress_document->ctx, impress_document);
361 ev_document_doc_mutex_unlock ();
363 impress_document->pixbuf = gdk_pixbuf_get_from_drawable (NULL,
364 GDK_DRAWABLE (impress_document->pixmap),
368 PAGE_WIDTH, PAGE_HEIGHT);
370 g_cond_broadcast (impress_document->cond);
375 impress_document_render_pixbuf (EvDocument *document,
378 ImpressDocument *impress_document = IMPRESS_DOCUMENT (document);
381 g_return_val_if_fail (IMPRESS_IS_DOCUMENT (document), NULL);
382 g_return_val_if_fail (impress_document->imp != NULL, NULL);
384 impress_document->pagenum = rc->page->index;
386 g_mutex_lock (impress_document->mutex);
387 impress_document->cond = g_cond_new ();
389 ev_document_fc_mutex_unlock ();
390 ev_document_doc_mutex_unlock ();
391 g_idle_add ((GSourceFunc) imp_render_get_from_drawable, impress_document);
392 g_cond_wait (impress_document->cond, impress_document->mutex);
393 g_cond_free (impress_document->cond);
394 ev_document_doc_mutex_lock ();
395 ev_document_fc_mutex_lock ();
397 g_mutex_unlock (impress_document->mutex);
399 pixbuf = impress_document->pixbuf;
400 impress_document->pixbuf = NULL;
405 static cairo_surface_t *
406 impress_document_render (EvDocument *document,
410 cairo_surface_t *surface, *scaled_surface;
412 pixbuf = impress_document_render_pixbuf (document, rc);
414 /* FIXME: impress backend should be ported to cairo */
415 surface = ev_document_misc_surface_from_pixbuf (pixbuf);
416 g_object_unref (pixbuf);
418 scaled_surface = ev_document_misc_surface_rotate_and_scale (surface,
419 (PAGE_WIDTH * rc->scale) + 0.5,
420 (PAGE_HEIGHT * rc->scale) + 0.5,
422 cairo_surface_destroy (surface);
424 return scaled_surface;
428 impress_document_finalize (GObject *object)
430 ImpressDocument *impress_document = IMPRESS_DOCUMENT (object);
432 if (impress_document->mutex)
433 g_mutex_free (impress_document->mutex);
435 if (impress_document->imp)
436 imp_close (impress_document->imp);
438 if (impress_document->ctx)
439 imp_delete_context (impress_document->ctx);
441 if (impress_document->pango_ctx)
442 g_object_unref (impress_document->pango_ctx);
444 if (impress_document->pixmap)
445 g_object_unref (G_OBJECT (impress_document->pixmap));
447 if (impress_document->gc)
448 g_object_unref (impress_document->gc);
450 G_OBJECT_CLASS (impress_document_parent_class)->finalize (object);
454 impress_document_class_init (ImpressDocumentClass *klass)
456 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
457 EvDocumentClass *ev_document_class = EV_DOCUMENT_CLASS (klass);
459 gobject_class->finalize = impress_document_finalize;
461 ev_document_class->load = impress_document_load;
462 ev_document_class->save = impress_document_save;
463 ev_document_class->get_n_pages = impress_document_get_n_pages;
464 ev_document_class->get_page_size = impress_document_get_page_size;
465 ev_document_class->render = impress_document_render;
469 impress_document_thumbnails_get_thumbnail (EvDocumentThumbnails *document,
474 GdkPixbuf *scaled_pixbuf;
476 pixbuf = impress_document_render_pixbuf (EV_DOCUMENT (document), rc);
477 scaled_pixbuf = gdk_pixbuf_scale_simple (pixbuf,
478 (PAGE_WIDTH * rc->scale),
479 (PAGE_HEIGHT * rc->scale),
480 GDK_INTERP_BILINEAR);
481 g_object_unref (pixbuf);
485 GdkPixbuf *tmp_pixbuf = scaled_pixbuf;
487 scaled_pixbuf = ev_document_misc_get_thumbnail_frame (-1, -1, tmp_pixbuf);
488 g_object_unref (tmp_pixbuf);
491 return scaled_pixbuf;
495 impress_document_thumbnails_get_dimensions (EvDocumentThumbnails *document,
500 gdouble page_width, page_height;
502 impress_document_get_page_size (EV_DOCUMENT (document),
504 &page_width, &page_height);
506 if (rc->rotation == 90 || rc->rotation == 270)
508 *width = (gint) (page_height * rc->scale);
509 *height = (gint) (page_width * rc->scale);
513 *width = (gint) (page_width * rc->scale);
514 *height = (gint) (page_height * rc->scale);
519 impress_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface)
521 iface->get_thumbnail = impress_document_thumbnails_get_thumbnail;
522 iface->get_dimensions = impress_document_thumbnails_get_dimensions;
526 impress_document_init (ImpressDocument *impress_document)
530 impress_document->mutex = g_mutex_new ();
531 impress_document->ctx = imp_create_context(&imp_render_functions);
533 window = gdk_screen_get_root_window (gdk_screen_get_default ());
535 impress_document->pixmap = gdk_pixmap_new (window,
536 PAGE_WIDTH, PAGE_HEIGHT, -1);
537 impress_document->gc = gdk_gc_new (impress_document->pixmap);
538 impress_document->pango_ctx = gdk_pango_context_get_for_screen (gdk_screen_get_default ());
542 * vim: sw=2 ts=8 cindent noai bs=2