GRASS png display driver - header file. More...

#include <stdio.h>
#include <grass/config.h>
#include "driver.h"
#include "path.h"

Include dependency graph for pngdriver.h:

This graph shows which files directly or indirectly include this file:

Data Structures
struct	png_state

Macros
#define	FILE_NAME "map.png"

#define	HEADER_SIZE 64

Functions
void	read_image (void)

void	read_ppm (void)

void	read_pgm (void)

void	read_bmp (void)

void	read_png (void)

void	write_image (void)

void	write_ppm (void)

void	write_pgm (void)

void	write_bmp (void)

void	write_png (void)

void	png_init_color_table (void)

unsigned int	png_get_color (int, int, int, int)

void	png_get_pixel (unsigned int, int , int , int , int )

void	png_draw_line (double, double, double, double)

void	png_polygon (struct path *)
	Draw polygon. More...

const struct driver *	PNG_Driver (void)
	Initialize display driver. More...

void	PNG_Box (double, double, double, double)
	Draw a (filled) rectangle. More...

void	PNG_Client_Close (void)

void	PNG_Erase (void)
	Erase screen. More...

void	PNG_Graph_close (void)
	Close down the graphics processing. This gets called only at driver termination time. More...

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

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

void	PNG_Line_width (double)
	Set line width. More...

void	PNG_begin_raster (int, int[2][2], double[2][2])
	Start drawing raster. More...

int	PNG_raster (int, int, const unsigned char , const unsigned char , const unsigned char , const unsigned char )
	Draw raster row. More...

void	PNG_Begin (void)

void	PNG_Move (double, double)

void	PNG_Cont (double, double)

void	PNG_Close (void)

void	PNG_Stroke (void)

void	PNG_Fill (void)

void	PNG_Point (double, double)
	Draw point. More...

void	PNG_Set_window (double, double, double, double)
	Set window. More...

void	PNG_color_rgb (int, int, int)
	Identify a color. More...

void	PNG_draw_bitmap (int, int, int, const unsigned char *)
	Draw bitmap. More...

Variables
struct png_state	png

Detailed Description

GRASS png display driver - header file.

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

Author: Glynn Clements

Definition in file pngdriver.h.

Macro Definition Documentation

◆ FILE_NAME

#define FILE_NAME "map.png"

Definition at line 27 of file pngdriver.h.

◆ HEADER_SIZE

#define HEADER_SIZE 64

Definition at line 29 of file pngdriver.h.

Function Documentation

◆ PNG_Begin()

void PNG_Begin ( void )

Definition at line 21 of file pngdriver/draw.c.

References path_begin().

◆ PNG_begin_raster()

void PNG_begin_raster	(	int	mask,
		int	s[2][2],
		double	fd[2][2]
	)

Start drawing raster.

Parameters

mask	non-zero int for mask
s	source (map) extent (left, right, top, bottom)
fd	destination (image) extent (left, right, top, bottom)

Definition at line 80 of file pngdriver/raster.c.

◆ PNG_Box()

void PNG_Box	(	double	fx1,
		double	fy1,
		double	fx2,
		double	fy2
	)

Draw a (filled) rectangle.

Parameters

fx1,fy1,fx2,fy2 rectangle coordinates

Definition at line 24 of file pngdriver/box.c.

Referenced by PNG_Point().

◆ PNG_Client_Close()

void PNG_Client_Close ( void )

◆ PNG_Close()

void PNG_Close ( void )

Definition at line 36 of file pngdriver/draw.c.

References path_close().

◆ PNG_color_rgb()

void PNG_color_rgb	(	int	r,
		int	g,
		int	b
	)

Identify a color.

Identify a color that has been set in the reset_color() (found in Reset_clr.c file in this directory). Subsequent graphics calls will use this color.

Called by: Color() in ../lib/Color.c

Parameters

r	red color value
g	green color value
b	blue color value

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

References png_state::current_color, png, and png_get_color().

◆ PNG_Cont()

void PNG_Cont	(	double	,
		double
	)

Definition at line 31 of file pngdriver/draw.c.

References path_cont().

◆ PNG_draw_bitmap()

void PNG_draw_bitmap	(	int	ncols,
		int	nrows,
		int	threshold,
		const unsigned char *	buf
	)

Draw bitmap.

Parameters

ncols,nrows	number of columns and rows
threshold	threshold value
buf	data buffer

Definition at line 33 of file pngdriver/draw_bitmap.c.

◆ png_draw_line()

void png_draw_line	(	double	,
		double	,
		double	,
		double
	)

Definition at line 65 of file draw_line.c.

References png_state::linewidth, and png.

Referenced by PNG_Stroke().

◆ PNG_Driver()

const struct driver* PNG_Driver ( void )

Initialize display driver.

Returns: pointer driver structure

Definition at line 21 of file pngdriver/driver.c.

◆ PNG_Erase()

void PNG_Erase ( void )

Erase screen.

Definition at line 20 of file pngdriver/erase.c.

References png_state::background, png_state::grid, png_state::height, png_state::modified, png, and png_state::width.

◆ PNG_Fill()

void PNG_Fill ( void )

Definition at line 46 of file pngdriver/draw.c.

References png_polygon().

◆ png_get_color()

unsigned int png_get_color	(	int	,
		int	,
		int	,
		int
	)

Definition at line 120 of file color_table.c.

References png, and png_state::true_color.

Referenced by PNG_color_rgb(), and PNG_Graph_set().

◆ png_get_pixel()

void png_get_pixel	(	unsigned	int,
		int *	,
		int *	,
		int *	,
		int *
	)

Definition at line 112 of file color_table.c.

References png, and png_state::true_color.

◆ PNG_Graph_close()

void PNG_Graph_close ( void )

Close down the graphics processing. This gets called only at driver termination time.

Definition at line 50 of file pngdriver/graph_close.c.

References png_state::mapped, png, and write_image().

◆ 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.

◆ png_init_color_table()

void png_init_color_table ( void )

Definition at line 73 of file color_table.c.

References png, and png_state::true_color.

Referenced by PNG_Graph_set().

◆ PNG_Line_width()

void PNG_Line_width ( double width )

Set line width.

Parameters

width line width (double precision)

Definition at line 23 of file pngdriver/line_width.c.

◆ PNG_Move()

void PNG_Move	(	double	,
		double
	)

Definition at line 26 of file pngdriver/draw.c.

References path_move().

◆ PNG_Point()

void PNG_Point	(	double	,
		double
	)

Draw point.

Definition at line 20 of file point.c.

References PNG_Box().

◆ png_polygon()

void png_polygon ( struct path * )

Draw polygon.

Definition at line 138 of file pngdriver/polygon.c.

References path::count, vertex::mode, P_CLOSE, path_close(), and path::vertices.

Referenced by PNG_Fill().

◆ PNG_raster()

int PNG_raster	(	int	n,
		int	row,
		const unsigned char *	red,
		const unsigned char *	grn,
		const unsigned char *	blu,
		const unsigned char *	nul
	)

Draw raster row.

Parameters

n	number of cells
row	raster row (starts at 0)
red,grn,blu,nul	red,green,blue and null value

Returns: next row

Definition at line 111 of file pngdriver/raster.c.

◆ PNG_Set_window()

void PNG_Set_window	(	double	t,
		double	b,
		double	l,
		double	r
	)

Set window.

Parameters

t,b,l,r top, bottom, left, right

Definition at line 23 of file pngdriver/set_window.c.

References b, png_state::clip_bot, png_state::clip_left, png_state::clip_rite, png_state::clip_top, png_state::height, l, png, r, t, and png_state::width.

◆ PNG_Stroke()

void PNG_Stroke ( void )

Definition at line 41 of file pngdriver/draw.c.

References path_stroke(), and png_draw_line().

◆ read_bmp()

void read_bmp ( void )

Definition at line 79 of file pngdriver/read_bmp.c.

References HEADER_SIZE.

Referenced by read_image().

◆ read_image()

void read_image ( void )

Definition at line 22 of file pngdriver/read.c.

References png_state::file_name, G_fatal_error(), G_strcasecmp(), png_state::has_alpha, png_state::modified, png, read_bmp(), read_pgm(), read_png(), and read_ppm().

◆ read_pgm()

void read_pgm ( void )

Definition at line 69 of file pngdriver/read_ppm.c.

References png_state::file_name, G_store(), and png.

Referenced by read_image().

◆ read_png()

void read_png ( void )

Definition at line 45 of file read_png.c.

Referenced by read_image().

◆ read_ppm()

void read_ppm ( void )

Definition at line 22 of file pngdriver/read_ppm.c.

Referenced by read_image().

◆ write_bmp()

void write_bmp ( void )

Definition at line 63 of file pngdriver/write_bmp.c.

References png_state::file_name, G_fatal_error(), HEADER_SIZE, output(), png, and x.

Referenced by write_image().

◆ write_image()

void write_image ( void )

Definition at line 22 of file pngdriver/write.c.

References png_state::file_name, G_fatal_error(), G_strcasecmp(), png_state::has_alpha, png_state::mapped, png_state::modified, png, write_bmp(), write_pgm(), write_png(), and write_ppm().

Referenced by PNG_Graph_close().

◆ write_pgm()

void write_pgm ( void )

Definition at line 49 of file pngdriver/write_ppm.c.

References png_state::file_name, G_fatal_error(), G_free(), G_store(), png_state::grid, png_state::height, output(), png, png_state::width, and x.

Referenced by write_image().

◆ write_png()

void write_png ( void )

Definition at line 56 of file write_png.c.

References output(), and x.

Referenced by write_image().

◆ write_ppm()

void write_ppm ( void )

Definition at line 21 of file pngdriver/write_ppm.c.

References png_state::file_name, G_fatal_error(), png_state::grid, png_state::height, output(), png, png_state::width, and x.

Referenced by write_image().

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().

Data Structures

Macros

Functions

Variables

Detailed Description

Macro Definition Documentation

◆ FILE_NAME

◆ HEADER_SIZE

Function Documentation

◆ PNG_Begin()

◆ PNG_begin_raster()

◆ PNG_Box()

◆ PNG_Client_Close()

◆ PNG_Close()

◆ PNG_color_rgb()

◆ PNG_Cont()

◆ PNG_draw_bitmap()

◆ png_draw_line()

◆ PNG_Driver()

◆ PNG_Erase()

◆ PNG_Fill()

◆ png_get_color()

◆ png_get_pixel()

◆ PNG_Graph_close()

◆ PNG_Graph_get_file()

◆ PNG_Graph_set()

◆ png_init_color_table()

◆ PNG_Line_width()

◆ PNG_Move()

◆ PNG_Point()

◆ png_polygon()

◆ PNG_raster()

◆ PNG_Set_window()

◆ PNG_Stroke()

◆ read_bmp()

◆ read_image()

◆ read_pgm()

◆ read_png()

◆ read_ppm()

◆ write_bmp()

◆ write_image()

◆ write_pgm()

◆ write_png()

◆ write_ppm()

Variable Documentation

◆ png