GRASS png display driver - set graphics processing. More...

#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <grass/gis.h>
#include <grass/colors.h>
#include <grass/glocale.h>
#include "pngdriver.h"

Include dependency graph for pngdriver/graph_set.c:

Go to the source code of this file.

Functions
int	PNG_Graph_set (void)
	Start up graphics processing. More...

const char *	PNG_Graph_get_file (void)
	Get render file. More...

Variables
struct png_state	png

Detailed Description

GRASS png display driver - set graphics processing.

This program is free software under the GNU General Public License (>=v2). Read the file COPYING that comes with GRASS for details.

Author: Per Henrik Johansen (original contributor); Glynn Clements

Definition in file pngdriver/graph_set.c.

Function Documentation

◆ PNG_Graph_get_file()

const char* PNG_Graph_get_file ( void )

Get render file.

Returns: file name

Definition at line 180 of file pngdriver/graph_set.c.

References png_state::file_name, and png.

◆ PNG_Graph_set()

int PNG_Graph_set ( void )

Start up graphics processing.

Anything that needs to be assigned, set up, started-up, or otherwise initialized happens here. This is called only at the startup of the graphics driver.

The external variables define the pixle limits of the graphics surface. The coordinate system used by the applications programs has the (0,0) origin in the upper left-hand corner. Hence, screen_left < screen_right screen_top < screen_bottom

Definition at line 82 of file pngdriver/graph_set.c.

References _, png_state::background, png_state::clip_bot, png_state::clip_left, png_state::clip_rite, png_state::clip_top, DEFAULT_FG_COLOR, FILE_NAME, png_state::file_name, G_debug(), G_gisinit, G_str_to_color(), G_strcasecmp(), G_verbose_message(), getenv(), png_state::has_alpha, png_state::height, png, png_get_color(), png_init_color_table(), screen_height, screen_width, png_state::true_color, and png_state::width.

Variable Documentation

◆ png

struct png_state png

Definition at line 32 of file pngdriver/graph_set.c.

Referenced by PNG_color_rgb(), png_draw_line(), PNG_draw_point(), PNG_Erase(), png_get_color(), png_get_pixel(), PNG_Graph_close(), PNG_Graph_get_file(), PNG_Graph_set(), png_init_color_table(), PNG_Set_window(), read_image(), read_pgm(), write_bmp(), write_image(), write_pgm(), and write_ppm().