GRASS GIS 8 Programmer's Manual 8.4.1(2025)-45ca3179ab
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pngdriver.h
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1/*!
2 \file lib/pngdriver/pngdriver.h
3
4 \brief GRASS png display driver - header file
5
6 (C) 2007-2014 by Glynn Clements 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 Glynn Clements
12 */
13
14#ifndef __PNGDRIVER_H__
15#define __PNGDRIVER_H__
16
17#include <stdio.h>
18
19#ifdef __MINGW32__
20#include <windows.h>
21#endif
22
23#include <grass/config.h>
24#include "driver.h"
25#include "path.h"
26
27#define FILE_NAME "map.png"
28
29#define HEADER_SIZE 64
30
31struct png_state {
32 char *file_name;
36 int mapped;
37#ifdef __MINGW32__
38 HANDLE handle;
39#endif
40
43 unsigned int *grid;
44 unsigned char palette[256][4];
45 unsigned int background;
47
49};
50
51extern struct png_state png;
52
53extern void read_image(void);
54extern void read_ppm(void);
55extern void read_pgm(void);
56extern void read_bmp(void);
57#ifdef HAVE_PNG_H
58extern void read_png(void);
59#endif
60
61extern void write_image(void);
62extern void write_ppm(void);
63extern void write_pgm(void);
64extern void write_bmp(void);
65#ifdef HAVE_PNG_H
66extern void write_png(void);
67#endif
68
69extern void png_init_color_table(void);
70extern unsigned int png_get_color(int, int, int, int);
71extern void png_get_pixel(unsigned int, int *, int *, int *, int *);
72extern void png_draw_line(double, double, double, double);
73extern void png_polygon(struct path *);
74
75extern const struct driver *PNG_Driver(void);
76
77extern void PNG_Box(double, double, double, double);
78extern void PNG_Client_Close(void);
79extern void PNG_Erase(void);
80extern void PNG_Graph_close(void);
81extern int PNG_Graph_set(void);
82extern const char *PNG_Graph_get_file(void);
83extern void PNG_Line_width(double);
84extern void PNG_begin_raster(int, int[2][2], double[2][2]);
85extern int PNG_raster(int, int, const unsigned char *, const unsigned char *,
86 const unsigned char *, const unsigned char *);
87extern void PNG_Begin(void);
88extern void PNG_Move(double, double);
89extern void PNG_Cont(double, double);
90extern void PNG_Close(void);
91extern void PNG_Stroke(void);
92extern void PNG_Fill(void);
93extern void PNG_Point(double, double);
94extern void PNG_Set_window(double, double, double, double);
95extern void PNG_color_rgb(int, int, int);
96extern void PNG_draw_bitmap(int, int, int, const unsigned char *);
97
98#endif /* __PNGDRIVER_H__ */
struct png_state png
void PNG_Close(void)
const struct driver * PNG_Driver(void)
Initialize display driver.
void write_pgm(void)
int PNG_raster(int, int, const unsigned char *, const unsigned char *, const unsigned char *, const unsigned char *)
void read_bmp(void)
void PNG_Begin(void)
void write_ppm(void)
void PNG_Move(double, double)
void write_bmp(void)
void PNG_Graph_close(void)
Close down the graphics processing. This gets called only at driver termination time.
void PNG_begin_raster(int, int[2][2], double[2][2])
Start drawing raster.
int PNG_Graph_set(void)
Start up graphics processing.
void PNG_Point(double, double)
Draw point.
Definition point.c:20
void read_ppm(void)
void PNG_Set_window(double, double, double, double)
Set window.
void png_get_pixel(unsigned int, int *, int *, int *, int *)
void png_init_color_table(void)
Definition color_table.c:72
void write_image(void)
void PNG_Line_width(double)
Set line width.
void png_polygon(struct path *)
Draw polygon.
void PNG_Cont(double, double)
void PNG_Client_Close(void)
void PNG_Stroke(void)
void read_image(void)
void PNG_Box(double, double, double, double)
Draw a (filled) rectangle.
void PNG_draw_bitmap(int, int, int, const unsigned char *)
Draw bitmap.
const char * PNG_Graph_get_file(void)
Get render file.
unsigned int png_get_color(int, int, int, int)
void png_draw_line(double, double, double, double)
Definition draw_line.c:68
void PNG_Fill(void)
void PNG_Erase(void)
Erase screen.
void read_pgm(void)
void PNG_color_rgb(int, int, int)
Identify a color.
void read_png(void)
Definition read_png.c:45
Definition path.h:15
double clip_left
Definition pngdriver.h:41
double clip_bot
Definition pngdriver.h:41
char * file_name
Definition pngdriver.h:32
int mapped
Definition pngdriver.h:36
int has_alpha
Definition pngdriver.h:35
double clip_top
Definition pngdriver.h:41
int current_color
Definition pngdriver.h:33
int true_color
Definition pngdriver.h:34
int height
Definition pngdriver.h:42
unsigned int * grid
Definition pngdriver.h:43
unsigned char palette[256][4]
Definition pngdriver.h:44
int width
Definition pngdriver.h:42
unsigned int background
Definition pngdriver.h:45
double clip_rite
Definition pngdriver.h:41
int linewidth
Definition pngdriver.h:48
int modified
Definition pngdriver.h:46
void write_png(void)
Definition write_png.c:55