12 static void cleanup(void);
17 static struct fb_fix_screeninfo finfo;
18 static struct fb_var_screeninfo vinfo;
19 static struct fb_var_screeninfo saved_vinfo;
20 static int saved_vinfo_valid;
26 if((fd = open("/dev/fb0", O_RDWR)) == -1) {
27 fprintf(stderr, "failed to open framebuffer device\n");
31 ioctl(fd, FBIOGET_FSCREENINFO, &finfo);
37 static void cleanup(void)
40 munmap(vmem, vmem_size);
47 void *fbgfx_set_video_mode(int x, int y, int depth)
49 struct fb_var_screeninfo new_vinfo;
55 ioctl(fd, FBIOGET_VSCREENINFO, &new_vinfo);
58 new_vinfo.bits_per_pixel = depth;
60 if(ioctl(fd, FBIOPUT_VSCREENINFO, &new_vinfo) == -1) {
61 fprintf(stderr, "failed to set video mode %dx%d %dbpp: %s\n", x, y, depth, strerror(errno));
66 munmap(vmem, vmem_size);
71 return fbgfx_get_video_mode(0, 0, 0);
74 void *fbgfx_get_video_mode(int *xptr, int *yptr, int *depthptr)
80 ioctl(fd, FBIOGET_VSCREENINFO, &vinfo);
81 vmem_size = vinfo.xres * vinfo.yres * vinfo.bits_per_pixel / 8;
84 if((vmem = mmap(0, vmem_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0)) == (void*)-1) {
85 fprintf(stderr, "failed to map video memory\n");
90 if(xptr) *xptr = vinfo.xres;
91 if(yptr) *yptr = vinfo.yres;
92 if(depthptr) *depthptr = vinfo.bits_per_pixel;
96 void fbgfx_save_video_mode(void)
102 if(ioctl(fd, FBIOGET_VSCREENINFO, &saved_vinfo) == -1) {
105 saved_vinfo_valid = 1;
108 void fbgfx_restore_video_mode(void)
110 if(init() == -1 || !saved_vinfo_valid) {
113 ioctl(fd, FBIOPUT_VSCREENINFO, &saved_vinfo);