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comparison old/simple_render/fb.h @ 507:735f76483bb2

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Reorganization..
author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Mon, 12 Oct 2009 09:39:35 +0900
parents TaskManager/Test/simple_render/fb.h@f64d75473f95
children
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506:1d4a8a86f26b 507:735f76483bb2
1 extern int get_fbdev_addr(void);
2
3 #if defined(__linux__)
4 #include <unistd.h>
5 #include <stdio.h>
6 #include <fcntl.h>
7 #include <linux/fb.h>
8 #include <linux/fs.h>
9 #include <sys/mman.h>
10 #include <sys/ioctl.h>
11 #include <stdlib.h>
12 #include <iostream>
13 using namespace std;
14
15 #define DEVICE_NAME "/dev/fb0"
16 #define DIV_BYTE 8
17
18 #define X_PIXEL_MAX 320
19 #define Y_LINE_MAX 240
20
21 #define BORDER1 80
22 #define BORDER2 160
23
24 #define COLOR_RED 0xf800
25 #define COLOR_GREEN 0x07e0
26 #define COLOR_BLUE 0x001f
27 #define COLOR_WHITE 0xffff
28 #define COLOR_BLACK 0x0000
29 #define COLOR_YELLOW 0xffe0
30
31 /* function prototype */
32 void send_current_error_msg(char *ptr);
33 void send_current_information(char *ptr);
34
35 int get_fbdev_addr(void)
36 {
37 int fd_framebuffer ;
38 struct fb_var_screeninfo vinfo;
39 struct fb_fix_screeninfo finfo;
40 long int screensize ;
41 //long int location;
42 char *fbptr ;
43 char tmp[DIV_BYTE*10];
44
45 //int x , y ;
46 int xres,yres,vbpp,line_len;
47 //unsigned short tcolor ;
48
49 /* 読み書き用にファイルを開く */
50 fd_framebuffer = open( DEVICE_NAME , O_RDWR);
51 if ( !fd_framebuffer ) {
52 send_current_error_msg("Framebuffer device open error !");
53 exit(1);
54 }
55 send_current_information("The framebuffer device was opened !");
56
57 /* 固定スクリーン情報取得 */
58 if ( ioctl( fd_framebuffer , FBIOGET_FSCREENINFO , &finfo ) ) {
59 send_current_error_msg("Fixed information not gotton !");
60 exit(2);
61 }
62
63 /* 変動スクリーン情報取得 */
64 if ( ioctl( fd_framebuffer , FBIOGET_VSCREENINFO , &vinfo ) ) {
65 send_current_error_msg("Variable information not gotton !");
66 exit(3);
67 }
68 xres = vinfo.xres ;
69 yres = vinfo.yres ;
70 vbpp = vinfo.bits_per_pixel ;
71 line_len = finfo.line_length ;
72 sprintf( tmp , "%d(pixel)x%d(line), %dbpp(bits per pixel)",xres,yres,vbpp);
73 send_current_information( tmp );
74
75 /* バイト単位でのスクリーンのサイズを計算 */
76 screensize = xres * yres * vbpp / DIV_BYTE ;
77
78 /* デバイスをメモリにマップする */
79 fbptr = (char *)mmap(0,screensize,PROT_READ | PROT_WRITE,MAP_SHARED,fd_framebuffer,0);
80 if ( (int)fbptr == -1 ) {
81 send_current_error_msg("Don't get framebuffer device to memory !");
82 exit(4);
83 }
84 send_current_information("The framebuffer device was mapped !");
85
86 printf("fb: 0x%x \n", (unsigned int)fbptr);
87 return (int)fbptr;
88 //munmap(fbptr,screensize);
89 //close(fd_framebuffer);
90 //return 0;
91 }
92
93 void send_current_error_msg(char *ptr)
94 {
95 fprintf( stderr , "%s\n" , ptr );
96 }
97
98 void send_current_information(char *ptr)
99 {
100 fprintf( stdout , "%s\n" , ptr );
101 }
102 #else /* __linux__ */
103 int get_fbdev_addr(void) {return 0;}
104 #endif /* __linux__ */