1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
|
/* viewer-pangox.c: PangoX viewer backend.
*
* Copyright (C) 1999,2004,2005 Red Hat, Inc.
* Copyright (C) 2001 Sun Microsystems
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include "viewer-render.h"
#include "viewer-x.h"
#include <pango/pangox.h>
static void
pangox_view_destroy (gpointer instance)
{
XViewer *x = (XViewer *)instance;
pango_x_shutdown_display (x->display);
x_view_destroy (instance);
}
static PangoContext *
pangox_view_get_context (gpointer instance)
{
XViewer *x = (XViewer *) instance;
PangoContext *context;
PangoMatrix matrix = {0., 0., 0., 0., 0., 0.};
context = pango_font_map_create_context (pango_x_font_map_for_display (x->display));
/* We set an all-zero matrix on the context, to negotiate that
* this backend doesn't support transformations.
*/
pango_context_set_matrix (context, &matrix);
return context;
}
typedef struct
{
XViewer *x;
Drawable drawable;
GC gc;
} MyXContext;
static void
render_callback (PangoLayout *layout,
int x,
int y,
gpointer context,
gpointer state)
{
MyXContext *x_context = (MyXContext *) context;
pango_x_render_layout (x_context->x->display,
x_context->drawable,
x_context->gc,
layout,
x, y);
}
static void
pangox_view_render (gpointer instance,
gpointer surface,
PangoContext *context,
int width,
int height,
gpointer state)
{
XViewer *x = (XViewer *) instance;
Pixmap pixmap = (Pixmap) surface;
GC gc;
MyXContext x_context;
gc = XCreateGC (x->display, pixmap, 0, NULL);
XSetForeground(x->display, gc, WhitePixel(x->display, x->screen));
XFillRectangle (x->display, pixmap, gc, 0, 0, width, height);
x_context.x = x;
x_context.drawable = pixmap;
x_context.gc = gc;
XSetForeground(x->display, gc, BlackPixel(x->display, x->screen));
do_output (context, render_callback, NULL, &x_context, state, NULL, NULL);
XFlush(x->display);
XFreeGC (x->display, gc);
}
const PangoViewer pangox_viewer = {
"PangoX",
"x",
NULL,
x_view_create,
pangox_view_destroy,
pangox_view_get_context,
x_view_create_surface,
x_view_destroy_surface,
pangox_view_render,
NULL,
x_view_create_window,
x_view_destroy_window,
x_view_display
};
|
