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comparison TaskManager/Test/simple_pack/fb.cpp @ 78:3c6dec161ade

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author chiaki
date Tue, 19 Feb 2008 15:49:40 +0900
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children 4d6bd3c0d90b
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77:459f54b49648 78:3c6dec161ade
1 #include <iostream>
2 #include <SDL.h>
3 #include <SDL_opengl.h>
4 #include <math.h>
5 #include <unistd.h>
6 #include "polygon.h"
7 #include "viewer.h"
8 #include "sys.h"
9 using namespace std;
10
11 void cleanup_fbdev() {
12 munmap(fbptr, screensize);
13 close(fd_framebuffer);
14 }
15
16 void send_current_error_msg(char *ptr) {
17 fprintf( stderr, "%s\n", ptr);
18 }
19
20 void send_current_information(char *ptr) {
21 fprintf( stdout, "%s\n", ptr);
22 }
23
24 int get_fbdev_addr(void) {
25 struct fb_var_screeninfo vinfo;
26 struct fb_fix_screeninfo finfo;
27 char tmp[DIV_BYTE*10];
28
29 int xres,yres, vbpp, line_len;
30
31 /* open the file only for read */
32 fd_framebuffer = open( DEVICE_NAME, O_RDWR);
33 if( !fd_framebuffer ) {
34 send_current_error_msg("Framebuffer device open error\n");
35 exit(1);
36 }
37 send_current_information("The framebuffer device was opened\n");
38
39 /* Get the fixed screen info */
40 if( ioctl( fd_framebuffer, FBIOGET_FSCREENINFO, &finfo) ) {
41 send_current_error_msg("Fixed information not gotton !");
42 exit(2);
43 }
44
45 /* Get the flucture screen info */
46 if( ioctl( fd_framebuffer, FBIOGET_VSCREENINFO, &vinfo) ) {
47 send_current_error_msg("Variable information not gotton !");
48 exit(3);
49 }
50
51 xres = vinfo.xres;
52 yres = vinfo.yres;
53 vbpp = vinfo.bits_per_pixel;
54 line_len = finfo.line_length;
55 sprintf( tmp, "%d(pixel)x%d(line), %dbpp(bits per pixel)", xres, yres, vbpp);
56 send_current_information( tmp );
57
58 /* calcurate screen size per byte */
59 screensize = xres * yres * vbpp / DIV_BYTE;
60
61 /* mapping device to memory */
62 fbptr = (char *)mmap(0,screensize, PROT_READ | PROT_WRITE, MAP_SHARED, fd_framebuffer, 0);
63 if( (int)fbptr == -1) {
64 send_current_error_msg("Don't get framebuffer device to memory !");
65 exit(4);
66 }
67 send_current_information("The framebuffer device was mapped !");
68
69 printf("fbptr:%x\n",(unsigned int)fbptr);
70 //munmap(fbptr, screensize);
71 //close(fd_framebuffer);
72 return (unsigned int)fbptr;
73 }