void fb_switch(int n_sig)
{
static int switching=0;
signal(SIGUSR2, fb_switch); /* reset signal handler */
if(switching && (n_sig == SIGUSR2))
return;
if(switching == 0)
switching = 1;
if(FB_visible)
{
b_store = (char*)malloc(visiblesize);
if(b_store == NULL)
fprintf(stderr,"FBlib:cannot use backing store for VT switch");
else
memcpy(b_store, fbp, visiblesize);
fb_unmap();
fbp = b_store;
FB_visible = 0;
if(ioctl(TTY,VT_RELDISP,1) < 0)
{
fprintf(stderr,"FBlib:ioctl VT_RELDISP failed: %s \n",strerror(errno));
fb_map();
free(b_store);
FB_visible=1;
}
}
else
{
if(ioctl(TTY,VT_RELDISP,VT_ACKACQ) < 0)
{
fprintf(stderr,"FBlib:ioctl VT_RELDISP failed: %s (FATAL error)\n",strerror(errno));
FB_exit();
exit(1);
}
fb_map();
memcpy(fbp, b_store, visiblesize);
free(b_store);
b_store=NULL;
FB_visible=1;
}
switching=0;
return;
}
void fb_init(void)
{
Debug("fb_init()\n");
fb_open();
fb_get_var();
memcpy(&saved_var, &fb_var, sizeof(struct fb_var_screeninfo));
//saved_var = fb_var;
if (fb_var.xoffset || fb_var.yoffset || fb_var.accel_flags) {
fb_var.xoffset = 0;
fb_var.yoffset = 0;
fb_var.accel_flags = 0;
fb_set_var();
}
fb_get_fix();
var_fix_validate();
memcpy(&saved_fix, &fb_fix, sizeof(struct fb_var_screeninfo));
//saved_fix = fb_fix;
switch (fb_fix.visual) {
case FB_VISUAL_MONO01:
case FB_VISUAL_MONO10:
case FB_VISUAL_TRUECOLOR:
/* no colormap */
break;
case FB_VISUAL_PSEUDOCOLOR:
case FB_VISUAL_STATIC_PSEUDOCOLOR:
cmap_init(1<<fb_var.bits_per_pixel);
break;
case FB_VISUAL_DIRECTCOLOR:
cmap_init(1<<(max(max(fb_var.red.length, fb_var.green.length),
max(fb_var.blue.length, fb_var.transp.length))));
break;
}
if (fb_cmap.len) {
fb_get_cmap();
saved_cmap = fb_cmap;
ALLOC_AND_SAVE_COMPONENT(red);
ALLOC_AND_SAVE_COMPONENT(green);
ALLOC_AND_SAVE_COMPONENT(blue);
if (fb_cmap.transp)
ALLOC_AND_SAVE_COMPONENT(transp);
}
fb_map();
fb_save();
fb_clear();
}
int fb_device_open(hw_module_t const *module, const char *name,
hw_device_t **device)
{
alloc_device_t *gralloc_device;
int err;
err = gralloc_open(module, &gralloc_device);
if (err < 0)
return err;
/* Initialize our state here */
fb_context_t *dev = (fb_context_t *)malloc(sizeof *dev);
memset(dev, 0, sizeof *dev);
/* Initialize the procs */
dev->device.common.tag = HARDWARE_DEVICE_TAG;
dev->device.common.version = 0;
dev->device.common.module = const_cast<hw_module_t *>(module);
dev->device.common.close = fb_close;
dev->device.setSwapInterval = fb_setSwapInterval;
dev->device.post = fb_post;
dev->device.setUpdateRect = 0;
private_module_t *m = (private_module_t*)module;
err = fb_map(m);
if (err < 0)
return err;
const_cast<uint32_t&>(dev->device.flags) = 0;
const_cast<uint32_t&>(dev->device.width) = m->mode->hdisplay;
const_cast<uint32_t&>(dev->device.height) = m->mode->vdisplay;
const_cast<int&>(dev->device.stride) = m->stride;
const_cast<int&>(dev->device.format) = HAL_PIXEL_FORMAT_RGB_565;
const_cast<float&>(dev->device.xdpi) = m->xdpi;
const_cast<float&>(dev->device.ydpi) = m->ydpi;
const_cast<float&>(dev->device.fps) = m->fps;
const_cast<int&>(dev->device.minSwapInterval) = 1;
const_cast<int&>(dev->device.maxSwapInterval) = 1;
*device = &dev->device.common;
return 0;
}
int FB_initlib(char *dev)
{
int ioctl_err;
char *errstr;
struct vt_mode vtmode;
if(!strcmp(dev, ""))
dev = "/dev/fb0";
fbufd = open(dev, O_RDWR); /* Open framebuffer device */
if(fbufd < 0)
{
errstr = strerror(errno);
fprintf(stderr, "FBlib:open %s failed: %s \n", dev, errstr);
return -1;
}
ioctl_err = ioctl(fbufd,FBIOGET_FSCREENINFO,&fb_fix_info); /* Get fixed informations */
if(ioctl_err < 0)
{
errstr = strerror(errno);
fprintf(stderr,"FBlib:ioctl FBIOGET_FSCREENINFO failed: %s \n",errstr);
return IOCTL_ERR;
}
/* Get backup variable infos */
ioctl_err = ioctl(fbufd,FBIOGET_VSCREENINFO,&backup_var_info);
/* Get changeable variable infos */
ioctl_err = ioctl(fbufd,FBIOGET_VSCREENINFO,&work_var_info);
if(ioctl_err < 0)
{
errstr=strerror(errno);
fprintf(stderr,"FBlib:ioctl FBIOGET_VSCREENINFO failed: %s \n",errstr);
return IOCTL_ERR;
}
work_var_info.xoffset = 0;
work_var_info.yoffset = 0;
ioctl_err = ioctl(fbufd,FBIOPUT_VSCREENINFO,&work_var_info);
if(ioctl_err < 0)
{
errstr = strerror(errno);
fprintf(stderr,"FBlib:ioctl FBIOPUT_VSCREENINFO failed: %s \n",errstr);
return IOCTL_ERR;
}
screensize = fb_fix_info.smem_len; /* size in bytes of the virtual screen */
visiblesize = work_var_info.xres * work_var_info.yres * (work_var_info.bits_per_pixel/8);
ioctl_err = ioctl(TTY, VT_GETMODE, &vtmode);
if(ioctl_err < 0)
{
errstr = strerror(errno);
fprintf(stderr,"FBlib:ioctl VT_GETMODE failed: %s \n",errstr);
return IOCTL_ERR;
}
vtmode.mode = VT_PROCESS;
vtmode.relsig = SIGUSR2;
vtmode.acqsig = SIGUSR2;
signal(SIGUSR2, fb_switch);
ioctl_err = ioctl(TTY, VT_SETMODE, &vtmode);
if(ioctl_err < 0)
{
errstr = strerror(errno);
fprintf(stderr,"FBlib:ioctl VT_SETMODE failed: %s \n",errstr);
return IOCTL_ERR;
}
ioctl_err = fb_map();
if(ioctl_err < 0)
return ioctl_err;
FB_change_font(DEFAULT_FONT);
inc_x = work_var_info.bits_per_pixel/8;
inc_y = fb_fix_info.line_length;
return OK;
}