GRASS 8 Programmer's Manual
8.6.0dev(2026)-f6f2c534ea
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cairodriver/read.c
Go to the documentation of this file.
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/*!
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\file lib/cairodriver/read.c
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\brief GRASS cairo display driver - read image (lower level functions)
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(C) 2007-2008, 2011 by Lars Ahlzen and the GRASS Development Team
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This program is free software under the GNU General Public License
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(>=v2). Read the file COPYING that comes with GRASS for details.
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\author Lars Ahlzen <lars ahlzen.com> (original contributor)
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\author Glynn Clements
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*/
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#include "
cairodriver.h
"
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void
cairo_read_image
(
void
)
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{
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G_debug
(1,
"read_image"
);
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if
(!
cairo
|| !
surface
)
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return
;
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if
(
ca
.file_type ==
FTYPE_PPM
) {
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G_debug
(1,
"Reading image from %s"
,
ca
.file_name);
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cairo_read_ppm
();
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}
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else
if
(
ca
.file_type ==
FTYPE_BMP
) {
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G_debug
(1,
"Reading image from %s"
,
ca
.file_name);
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cairo_read_bmp
();
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}
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#if CAIRO_HAS_PNG_FUNCTIONS
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else
if
(
ca
.file_type ==
FTYPE_PNG
) {
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cairo_surface_t
*
img_surf
;
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G_debug
(1,
"Reading image from %s"
,
ca
.file_name);
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img_surf
=
cairo_image_surface_create_from_png
(
ca
.file_name);
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if
(!
img_surf
)
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return
;
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cairo_save
(
cairo
);
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cairo_set_source_surface
(
cairo
,
img_surf
, 0, 0);
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cairo_paint
(
cairo
);
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cairo_restore
(
cairo
);
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cairo_surface_destroy
(
img_surf
);
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}
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#endif
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#if CAIRO_HAS_XLIB_XRENDER_SURFACE
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else
if
(
ca
.file_type ==
FTYPE_X11
) {
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G_debug
(1,
"Reading XID from %s"
,
ca
.file_name);
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cairo_read_xid
();
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}
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#endif
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/* vector format files are written directly to file */
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ca
.modified = 0;
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}
cairo_read_image
void cairo_read_image(void)
Definition
cairodriver/read.c:17
cairodriver.h
GRASS cairo display driver - header file.
FTYPE_PPM
#define FTYPE_PPM
Definition
cairodriver.h:54
FTYPE_X11
#define FTYPE_X11
Definition
cairodriver.h:60
cairo_read_bmp
void cairo_read_bmp(void)
Definition
cairodriver/read_bmp.c:82
cairo_read_xid
void cairo_read_xid(void)
Definition
read_xid.c:5
surface
cairo_surface_t * surface
Definition
cairodriver/graph.c:45
ca
struct cairo_state ca
Definition
cairodriver/graph.c:42
FTYPE_PNG
#define FTYPE_PNG
Definition
cairodriver.h:56
FTYPE_BMP
#define FTYPE_BMP
Definition
cairodriver.h:55
cairo
cairo_t * cairo
Definition
cairodriver/graph.c:46
cairo_read_ppm
void cairo_read_ppm(void)
Definition
cairodriver/read_ppm.c:19
AMI_STREAM
Definition
ami_stream.h:153
G_debug
int G_debug(int, const char *,...) __attribute__((format(printf
lib
cairodriver
read.c
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