GRASS GIS 7 Programmer's Manual
7.8.3(2020)-exported
cairodriver/read.c
Go to the documentation of this file.
1
/*!
2
\file lib/cairodriver/read.c
3
4
\brief GRASS cairo display driver - read image (lower level functions)
5
6
(C) 2007-2008, 2011 by Lars Ahlzen and the GRASS Development Team
7
8
This program is free software under the GNU General Public License
9
(>=v2). Read the file COPYING that comes with GRASS for details.
10
11
\author Lars Ahlzen <lars ahlzen.com> (original contibutor)
12
\author Glynn Clements
13
*/
14
15
#include "
cairodriver.h
"
16
17
void
cairo_read_image
(
void
)
18
{
19
G_debug
(1,
"read_image"
);
20
21
if
(!
cairo
|| !
surface
)
22
return
;
23
24
if
(
ca
.
file_type
==
FTYPE_PPM
) {
25
G_debug
(1,
"Reading image from %s"
,
ca
.
file_name
);
26
cairo_read_ppm
();
27
}
28
else
if
(
ca
.
file_type
==
FTYPE_BMP
) {
29
G_debug
(1,
"Reading image from %s"
,
ca
.
file_name
);
30
cairo_read_bmp
();
31
}
32
#if CAIRO_HAS_PNG_FUNCTIONS
33
else
if
(
ca
.
file_type
==
FTYPE_PNG
) {
34
cairo_surface_t *img_surf;
35
36
G_debug
(1,
"Reading image from %s"
,
ca
.
file_name
);
37
38
img_surf = cairo_image_surface_create_from_png(
ca
.
file_name
);
39
if
(!img_surf)
40
return
;
41
42
cairo_save(
cairo
);
43
cairo_set_source_surface(
cairo
, img_surf, 0, 0);
44
cairo_paint(
cairo
);
45
cairo_restore(
cairo
);
46
47
cairo_surface_destroy(img_surf);
48
}
49
#endif
50
#if CAIRO_HAS_XLIB_XRENDER_SURFACE
51
else
if
(
ca
.
file_type
==
FTYPE_X11
) {
52
G_debug
(1,
"Reading XID from %s"
,
ca
.
file_name
);
53
cairo_read_xid
();
54
}
55
#endif
56
/* vector format files are written directly to file */
57
58
ca
.
modified
= 0;
59
}
cairo_read_ppm
void cairo_read_ppm(void)
Definition:
cairodriver/read_ppm.c:19
cairo_read_bmp
void cairo_read_bmp(void)
Definition:
cairodriver/read_bmp.c:81
cairo_state::modified
int modified
Definition:
cairodriver.h:70
ca
struct cairo_state ca
Definition:
cairodriver/graph.c:42
cairo_state::file_type
int file_type
Definition:
cairodriver.h:66
cairo
cairo_t * cairo
Definition:
cairodriver/graph.c:46
cairo_read_xid
void cairo_read_xid(void)
Definition:
read_xid.c:5
cairo_state::file_name
char * file_name
Definition:
cairodriver.h:65
surface
cairo_surface_t * surface
Definition:
cairodriver/graph.c:45
FTYPE_PNG
#define FTYPE_PNG
Definition:
cairodriver.h:55
cairodriver.h
GRASS cairo display driver - header file.
cairo_read_image
void cairo_read_image(void)
Definition:
cairodriver/read.c:17
FTYPE_PPM
#define FTYPE_PPM
Definition:
cairodriver.h:53
G_debug
int G_debug(int level, const char *msg,...)
Print debugging message.
Definition:
debug.c:65
FTYPE_X11
#define FTYPE_X11
Definition:
cairodriver.h:59
FTYPE_BMP
#define FTYPE_BMP
Definition:
cairodriver.h:54
cairodriver
read.c
Generated on Tue May 5 2020 09:45:27 for GRASS GIS 7 Programmer's Manual by
1.8.17