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.
24 #include "impress-document.h"
25 #include "ev-document-thumbnails.h"
26 #include "ev-document-misc.h"
28 struct _ImpressDocumentClass
30 GObjectClass parent_class;
33 struct _ImpressDocument
35 GObject parent_instance;
43 PangoContext *pango_ctx;
45 /* Only used while rendering inside the mainloop */
51 #define PAGE_WIDTH 1024
52 #define PAGE_HEIGHT 768
54 typedef struct _ImpressDocumentClass ImpressDocumentClass;
56 static void impress_document_document_iface_init (EvDocumentIface *iface);
57 static void impress_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface);
59 G_DEFINE_TYPE_WITH_CODE (ImpressDocument, impress_document, G_TYPE_OBJECT,
60 { G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT,
61 impress_document_document_iface_init);
62 G_IMPLEMENT_INTERFACE (EV_TYPE_DOCUMENT_THUMBNAILS,
63 impress_document_document_thumbnails_iface_init);
68 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)
71 int ax, bx, cx, ay, by, cy;
78 bx = 3 * (x2 - x1) - cx;
79 ax = x3 - x0 - cx - bx;
81 by = 3 * (y2 - y1) - cy;
82 ay = y3 - y0 - cy - by;
84 for (t = 0; t < 1; t += 0.01) {
87 nx = ax * t3 + bx * t2 + cx * t + x0;
88 ny = ay * t3 + by * t2 + cy * t + y0;
89 gdk_draw_line (d, gc, x, y, nx, ny);
96 imp_render_get_size(void *drw_data, int *w, int *h)
98 ImpressDocument *impress_document = IMPRESS_DOCUMENT (drw_data);
100 gdk_drawable_get_size(impress_document->pixmap, w, h);
104 imp_render_set_fg_color(void *drw_data, ImpColor *color)
106 ImpressDocument *impress_document = IMPRESS_DOCUMENT (drw_data);
110 c.green = color->green;
111 c.blue = color->blue;
112 gdk_gc_set_rgb_fg_color(impress_document->gc, &c);
116 imp_render_draw_line(void *drw_data, int x1, int y1, int x2, int y2)
118 ImpressDocument *impress_document = IMPRESS_DOCUMENT (drw_data);
120 gdk_draw_line(impress_document->pixmap, impress_document->gc, x1, y1, x2, y2);
124 imp_render_draw_rect(void *drw_data, int fill, int x, int y, int w, int h)
126 ImpressDocument *impress_document = IMPRESS_DOCUMENT (drw_data);
128 gdk_draw_rectangle(impress_document->pixmap, impress_document->gc, fill, x, y, w, h);
132 imp_render_draw_polygon(void *drw_data, int fill, ImpPoint *pts, int nr_pts)
134 ImpressDocument *impress_document = IMPRESS_DOCUMENT (drw_data);
136 gdk_draw_polygon(impress_document->pixmap, impress_document->gc, fill, (GdkPoint *)pts, nr_pts);
140 imp_render_draw_arc(void *drw_data, int fill, int x, int y, int w, int h, int sa, int ea)
142 ImpressDocument *impress_document = IMPRESS_DOCUMENT (drw_data);
144 gdk_draw_arc(impress_document->pixmap, impress_document->gc, fill, x, y, w, h, sa * 64, ea * 64);
148 imp_render_draw_bezier(void *drw_data, int x0, int y0, int x1, int y1, int x2, int y2, int x3, int y3)
150 ImpressDocument *impress_document = IMPRESS_DOCUMENT (drw_data);
152 imp_render_draw_bezier_real (impress_document->pixmap, impress_document->gc, x0, y0, x1, y1, x2, y2, x3, y3);
156 imp_render_open_image(void *drw_data, const unsigned char *pix, size_t size)
158 GdkPixbufLoader *gpl;
161 gpl = gdk_pixbuf_loader_new();
162 gdk_pixbuf_loader_write(gpl, pix, size, NULL);
163 gdk_pixbuf_loader_close(gpl, NULL);
164 pb = gdk_pixbuf_loader_get_pixbuf(gpl);
169 imp_render_get_image_size(void *drw_data, void *img_data, int *w, int *h)
171 GdkPixbuf *pb = (GdkPixbuf *) img_data;
173 *w = gdk_pixbuf_get_width(pb);
174 *h = gdk_pixbuf_get_height(pb);
178 imp_render_scale_image(void *drw_data, void *img_data, int w, int h)
180 GdkPixbuf *pb = (GdkPixbuf *) img_data;
182 return gdk_pixbuf_scale_simple(pb, w, h, GDK_INTERP_BILINEAR);
186 imp_render_draw_image(void *drw_data, void *img_data, int x, int y, int w, int h)
188 ImpressDocument *impress_document = IMPRESS_DOCUMENT (drw_data);
189 GdkPixbuf *pb = (GdkPixbuf *) img_data;
191 gdk_draw_pixbuf(impress_document->pixmap, impress_document->gc, pb, 0, 0, x, y, w, h, GDK_RGB_DITHER_NONE, 0, 0);
195 imp_render_close_image(void *drw_data, void *img_data)
197 GdkPixbuf *pb = (GdkPixbuf *) img_data;
199 g_object_unref(G_OBJECT(pb));
203 imp_render_markup(const char *text, size_t len, int styles, int size)
205 double scr_mm, scr_px, dpi;
210 scr_mm = gdk_screen_get_height_mm(gdk_screen_get_default());
211 scr_px = gdk_screen_get_height(gdk_screen_get_default());
212 dpi = (scr_px / scr_mm) * 25.4;
213 sz = (int) ((double) size * 72.0 * PANGO_SCALE / dpi);
214 esc = g_markup_escape_text(text, len);
215 ret = g_strdup_printf("<span size ='%d'>%s</span>", sz, esc);
221 imp_render_get_text_size(void *drw_data, const char *text, size_t len, int size, int styles, int *w, int *h)
223 ImpressDocument *impress_document = IMPRESS_DOCUMENT (drw_data);
228 g_return_if_fail (impress_document->pango_ctx != NULL);
230 lay = pango_layout_new(impress_document->pango_ctx);
231 m = imp_render_markup(text, len, styles, size);
232 pango_layout_set_markup(lay, m, strlen(m));
233 pango_layout_get_size(lay, &pw, &ph);
236 *w = pw / PANGO_SCALE;
237 *h = ph / PANGO_SCALE;
241 imp_render_draw_text(void *drw_data, int x, int y, const char *text, size_t len, int size, int styles)
243 ImpressDocument *impress_document = IMPRESS_DOCUMENT (drw_data);
247 g_return_if_fail (impress_document->pango_ctx != NULL);
249 lay = pango_layout_new(impress_document->pango_ctx);
250 m = imp_render_markup(text, len, styles, size);
251 pango_layout_set_markup(lay, m, strlen(m));
252 gdk_draw_layout(impress_document->pixmap, impress_document->gc, x, y, lay);
257 static const ImpDrawer imp_render_functions = {
259 imp_render_set_fg_color,
260 imp_render_draw_line,
261 imp_render_draw_rect,
262 imp_render_draw_polygon,
264 imp_render_draw_bezier,
265 imp_render_open_image,
266 imp_render_get_image_size,
267 imp_render_scale_image,
268 imp_render_draw_image,
269 imp_render_close_image,
270 imp_render_get_text_size,
274 /* Document interface */
276 impress_document_load (EvDocument *document,
280 ImpressDocument *impress_document = IMPRESS_DOCUMENT (document);
285 /* FIXME: Could we actually load uris ? */
286 filename = g_filename_from_uri (uri, NULL, error);
294 imp = imp_open (filename, &err);
298 //FIXME translate the err, set error
302 impress_document->imp = imp;
308 impress_document_save (EvDocument *document,
316 impress_document_get_n_pages (EvDocument *document)
318 ImpressDocument *impress_document = IMPRESS_DOCUMENT (document);
320 g_return_val_if_fail (IMPRESS_IS_DOCUMENT (document), 0);
321 g_return_val_if_fail (impress_document->imp != NULL, 0);
323 return imp_nr_pages (impress_document->imp);
327 impress_document_get_page_size (EvDocument *document,
332 ImpressDocument *impress_document = IMPRESS_DOCUMENT (document);
334 g_return_if_fail (IMPRESS_IS_DOCUMENT (document));
335 g_return_if_fail (impress_document->imp != NULL);
339 *height = PAGE_HEIGHT;
343 imp_render_get_from_drawable (ImpressDocument *impress_document)
347 page = imp_get_page (impress_document->imp, impress_document->pagenum);
349 g_return_val_if_fail (page != NULL, FALSE);
351 imp_context_set_page (impress_document->ctx, page);
352 imp_render (impress_document->ctx, impress_document);
354 impress_document->pixbuf = gdk_pixbuf_get_from_drawable (NULL,
355 GDK_DRAWABLE (impress_document->pixmap),
359 PAGE_WIDTH, PAGE_HEIGHT);
360 g_cond_broadcast (impress_document->cond);
365 impress_document_render_pixbuf (EvDocument *document,
368 ImpressDocument *impress_document = IMPRESS_DOCUMENT (document);
369 GdkPixbuf *scaled_pixbuf;
371 g_return_val_if_fail (IMPRESS_IS_DOCUMENT (document), 0);
372 g_return_val_if_fail (impress_document->imp != NULL, 0);
374 impress_document->pagenum = rc->page;
376 g_mutex_lock (impress_document->mutex);
377 impress_document->cond = g_cond_new ();
379 g_idle_add ((GSourceFunc) imp_render_get_from_drawable, impress_document);
381 g_cond_wait (impress_document->cond, impress_document->mutex);
382 g_cond_free (impress_document->cond);
383 g_mutex_unlock (impress_document->mutex);
385 scaled_pixbuf = gdk_pixbuf_scale_simple (impress_document->pixbuf,
386 PAGE_WIDTH * rc->scale,
387 PAGE_HEIGHT * rc->scale,
388 GDK_INTERP_BILINEAR);
389 gdk_pixbuf_unref (impress_document->pixbuf);
390 impress_document->pixbuf = NULL;
392 return scaled_pixbuf;
396 impress_document_finalize (GObject *object)
398 ImpressDocument *impress_document = IMPRESS_DOCUMENT (object);
400 g_mutex_free (impress_document->mutex);
402 imp_close (impress_document->imp);
403 imp_delete_context (impress_document->ctx);
404 g_free (impress_document->pango_ctx);
405 g_object_unref (G_OBJECT (impress_document->pixmap));
406 g_object_unref (impress_document->gc);
408 G_OBJECT_CLASS (impress_document_parent_class)->finalize (object);
412 impress_document_class_init (ImpressDocumentClass *klass)
414 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
416 gobject_class->finalize = impress_document_finalize;
420 impress_document_can_get_text (EvDocument *document)
425 static EvDocumentInfo *
426 impress_document_get_info (EvDocument *document)
428 EvDocumentInfo *info;
430 info = g_new0 (EvDocumentInfo, 1);
431 info->fields_mask = 0;
437 impress_document_document_iface_init (EvDocumentIface *iface)
439 iface->load = impress_document_load;
440 iface->save = impress_document_save;
441 iface->can_get_text = impress_document_can_get_text;
442 iface->get_n_pages = impress_document_get_n_pages;
443 iface->get_page_size = impress_document_get_page_size;
444 iface->render_pixbuf = impress_document_render_pixbuf;
445 iface->get_info = impress_document_get_info;
449 impress_document_thumbnails_get_thumbnail (EvDocumentThumbnails *document,
455 GdkPixbuf *pixbuf = NULL;
459 impress_document_get_page_size (EV_DOCUMENT (document),
463 rc = ev_render_context_new (rotation, page, size/w);
464 pixbuf = impress_document_render_pixbuf (EV_DOCUMENT (document), rc);
465 g_object_unref (G_OBJECT (rc));
469 GdkPixbuf *tmp_pixbuf = pixbuf;
470 pixbuf = ev_document_misc_get_thumbnail_frame (-1, -1, 0, tmp_pixbuf);
471 g_object_unref (tmp_pixbuf);
478 impress_document_thumbnails_get_dimensions (EvDocumentThumbnails *document,
480 gint suggested_width,
487 impress_document_get_page_size (EV_DOCUMENT (document),
490 g_return_if_fail (w > 0);
492 *width = suggested_width;
493 *height = (gint) (suggested_width * page_ratio);
497 impress_document_document_thumbnails_iface_init (EvDocumentThumbnailsIface *iface)
499 iface->get_thumbnail = impress_document_thumbnails_get_thumbnail;
500 iface->get_dimensions = impress_document_thumbnails_get_dimensions;
504 impress_document_init (ImpressDocument *impress_document)
508 impress_document->mutex = g_mutex_new ();
509 impress_document->ctx = imp_create_context(&imp_render_functions);
511 window = gdk_screen_get_root_window (gdk_screen_get_default ());
513 impress_document->pixmap = gdk_pixmap_new (window,
514 PAGE_WIDTH, PAGE_HEIGHT, -1);
515 impress_document->gc = gdk_gc_new (impress_document->pixmap);
516 impress_document->pango_ctx = gdk_pango_context_get ();
520 * vim: sw=2 ts=8 cindent noai bs=2