Evince
Evince is a document viewer capable of displaying multiple and single page document formats like PDF and Postscript.
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ev-render-context.h
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1 /* this file is part of evince, a gnome document viewer
2  *
3  * Copyright (C) 2005 Jonathan Blandford <jrb@gnome.org>
4  *
5  * Evince is free software; you can redistribute it and/or modify it
6  * under the terms of the GNU General Public License as published by
7  * the Free Software Foundation; either version 2 of the License, or
8  * (at your option) any later version.
9  *
10  * Evince is distributed in the hope that it will be useful, but
11  * WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13  * General Public License for more details.
14  *
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
18  */
19 
20 #if !defined (__EV_EVINCE_DOCUMENT_H_INSIDE__) && !defined (EVINCE_COMPILATION)
21 #error "Only <evince-document.h> can be included directly."
22 #endif
23 
24 #ifndef EV_RENDER_CONTEXT_H
25 #define EV_RENDER_CONTEXT_H
26 
27 #include <glib-object.h>
28 
29 #include "ev-page.h"
30 
31 G_BEGIN_DECLS
32 
33 typedef struct _EvRenderContext EvRenderContext;
34 typedef struct _EvRenderContextClass EvRenderContextClass;
35 
36 #define EV_TYPE_RENDER_CONTEXT (ev_render_context_get_type())
37 #define EV_RENDER_CONTEXT(object) (G_TYPE_CHECK_INSTANCE_CAST((object), EV_TYPE_RENDER_CONTEXT, EvRenderContext))
38 #define EV_RENDER_CONTEXT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass), EV_TYPE_RENDER_CONTEXT, EvRenderContextClass))
39 #define EV_IS_RENDER_CONTEXT(object) (G_TYPE_CHECK_INSTANCE_TYPE((object), EV_TYPE_RENDER_CONTEXT))
40 
41 struct _EvRenderContextClass
42 {
43  GObjectClass klass;
44 };
45 
46 struct _EvRenderContext
47 {
48  GObject parent;
49 
50  EvPage *page;
51  gint rotation;
52  gdouble scale;
53  gint target_width;
54  gint target_height;
55 };
56 
57 
58 GType ev_render_context_get_type (void) G_GNUC_CONST;
59 EvRenderContext *ev_render_context_new (EvPage *page,
60  gint rotation,
61  gdouble scale);
62 void ev_render_context_set_page (EvRenderContext *rc,
63  EvPage *page);
64 void ev_render_context_set_rotation (EvRenderContext *rc,
65  gint rotation);
66 void ev_render_context_set_scale (EvRenderContext *rc,
67  gdouble scale);
68 void ev_render_context_set_target_size (EvRenderContext *rc,
69  int target_width,
70  int target_height);
71 void ev_render_context_compute_scaled_size (EvRenderContext *rc,
72  double width_points,
73  double height_points,
74  int *scaled_width,
75  int *scaled_height);
76 void ev_render_context_compute_transformed_size (EvRenderContext *rc,
77  double width_points,
78  double height_points,
79  int *transformed_width,
80  int *transformed_height);
81 void ev_render_context_compute_scales (EvRenderContext *rc,
82  double width_points,
83  double height_points,
84  double *scale_x,
85  double *scale_y);
86 
87 G_END_DECLS
88 
89 #endif /* !EV_RENDER_CONTEXT */