-#define FRAMEBUFFER_SIZE(xsz, ysz, bpp) ((xsz) * (ysz) * (bpp) / CHAR_BIT)
-
-static unsigned char *framebuffer;
-static int dev_fd = -1;
-
-static Rect screen_rect;
-static int color_depth; //bits per pixel
-
-bool init_gfx()
-{
- if((dev_fd = open("/dev/fb0", O_RDWR)) == -1) {
- fprintf(stderr, "Cannot open /dev/fb0 : %s\n", strerror(errno));
- return false;
- }
-
- fb_var_screeninfo sinfo;
- if(ioctl(dev_fd, FBIOGET_VSCREENINFO, &sinfo) == -1) {
- close(dev_fd);
- dev_fd = -1;
- fprintf(stderr, "Unable to get screen info : %s\n", strerror(errno));
- return false;
- }
-
- printf("width : %d height : %d\n : bpp : %d\n", sinfo.xres, sinfo.yres, sinfo.bits_per_pixel);
- printf("virtual w: %d virtual h: %d\n", sinfo.xres_virtual, sinfo.yres_virtual);
-
- screen_rect.x = screen_rect.y = 0;
- screen_rect.width = sinfo.xres_virtual;
- screen_rect.height = sinfo.yres_virtual;
- color_depth = sinfo.bits_per_pixel;
-
- int sz = FRAMEBUFFER_SIZE(screen_rect.width, screen_rect.height, color_depth);
- framebuffer = (unsigned char*)mmap(0, sz, PROT_READ | PROT_WRITE, MAP_SHARED, dev_fd, 0);
-
- if(framebuffer == (void*)-1) {
- close(dev_fd);
- dev_fd = -1;
- fprintf(stderr, "Cannot map the framebuffer to memory : %s\n", strerror(errno));
- return false;
- }
-
- return true;
-}
-
-void destroy_gfx()
-{
- clear_screen(0, 0, 0);
-
- if(dev_fd != -1) {
- close(dev_fd);
- }
-
- dev_fd = -1;
-
- munmap(framebuffer, FRAMEBUFFER_SIZE(screen_rect.width, screen_rect.height, color_depth));
- framebuffer = 0;
-}
-
-unsigned char *get_framebuffer()
-{
- return framebuffer;
-}
-
-Rect get_screen_size()
-{
- return screen_rect;
-}
-
-int get_color_depth()
-{
- return color_depth;
-}
-