void shader_program::activate()
{
block_ = GPU_LoadShaderBlock(program_object_, "vert_vertex",
"vert_texture_pos", "vert_draw_color",
"model_view_proj");
GPU_ActivateShaderProgram(program_object_, &block_);
//NOTE: this line can be removed once we made sure that a sane overlay
// will be set before rendering anything.
set_overlay(image::get_texture("misc/blank.png"));
}
int main (int argc, char **argv){
struct v4l2_format format;
int vfd;
int stat;
int overlay;
if (argc!=6){
usage (argv[0]);
return 1;
}
vfd = open (V4L2,O_RDWR);
if (vfd<0){
perror ("error opening v4l2-device ");
return 1;
}
set_overlay(vfd, atoi(argv[1]), atoi(argv[2]), atoi(argv[3]), atoi(argv[4]));
format.type = V4L2_BUF_TYPE_VIDEO_OVERLAY;
stat = ioctl(vfd, VIDIOC_G_FMT, &format); // get format information
if (stat<0){
perror ("error VIDIOC_G_FMT ");
close (vfd);
return 2;
}
printf ("output overlay set to x:%d y:%d width:%d height:%d\n",
format.fmt.win.w.left,
format.fmt.win.w.top,
format.fmt.win.w.width,
format.fmt.win.w.height);
overlay=1;
stat = ioctl(vfd, VIDIOC_OVERLAY, &overlay); // make overlay visible
if (stat<0){
perror ("error VIDIOC_OVERLAY \"on\" ");
close (vfd);
return 2;
}
sleep (atoi(argv[5]));
overlay=0;
stat = ioctl(vfd, VIDIOC_OVERLAY, &overlay); // turn off overlay
if (stat<0){
perror ("error VIDIOC_OVERLAY \"off\" ");
close (vfd);
return 2;
}
close (vfd);
return 0;
}
