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#![allow(dead_code)]
use libc;
use libc::ioctl;
use mmap;
use mmap::MemoryMap;
use std::os::unix::io::AsRawFd;
use std::sync::atomic::AtomicU32;
use std::fs::{OpenOptions, File};
use mxc_types;
use mxc_types::{VarScreeninfo, FixScreeninfo, FBIOGET_FSCREENINFO, FBIOGET_VSCREENINFO,
FBIOPUT_VSCREENINFO, MXCFB_ENABLE_EPDC_ACCESS, MXCFB_DISABLE_EPDC_ACCESS};
use rusttype::{Font, FontCollection};
pub struct Framebuffer<'a> {
pub device: File,
pub frame: MemoryMap,
pub marker: ::std::sync::atomic::AtomicU32,
pub default_font: Font<'a>,
pub var_screen_info: VarScreeninfo,
pub fix_screen_info: FixScreeninfo,
}
pub trait FramebufferBase<'a> {
fn new(path_to_device: &str) -> Framebuffer;
fn set_epdc_access(&mut self, state: bool);
fn set_autoupdate_mode(&mut self, mode: u32);
fn set_update_scheme(&mut self, scheme: u32);
fn get_fix_screeninfo(device: &File) -> FixScreeninfo;
fn get_var_screeninfo(device: &File) -> VarScreeninfo;
fn put_var_screeninfo(&mut self) -> bool;
}
unsafe impl<'a> Send for Framebuffer<'a> {}
unsafe impl<'a> Sync for Framebuffer<'a> {}
impl<'a> FramebufferBase<'a> for Framebuffer<'a> {
fn new(path_to_device: &str) -> Framebuffer {
let device = OpenOptions::new()
.read(true)
.write(true)
.open(path_to_device)
.unwrap();
let mut var_screen_info = Framebuffer::get_var_screeninfo(&device);
let fix_screen_info = Framebuffer::get_fix_screeninfo(&device);
let frame_length = (fix_screen_info.line_length * var_screen_info.yres) as usize;
let mem_map = MemoryMap::new(
frame_length,
&[
mmap::MapOption::MapReadable,
mmap::MapOption::MapWritable,
mmap::MapOption::MapFd(device.as_raw_fd()),
mmap::MapOption::MapOffset(0),
mmap::MapOption::MapNonStandardFlags(libc::MAP_SHARED),
],
).unwrap();
let font_data = include_bytes!("../assets/DejaVuSans.ttf");
let collection = FontCollection::from_bytes(font_data as &[u8]);
var_screen_info.xres = 1872;
var_screen_info.yres = 1404;
var_screen_info.rotate = 1;
var_screen_info.width = var_screen_info.xres;
var_screen_info.height = var_screen_info.yres;
var_screen_info.pixclock = 160000000;
var_screen_info.left_margin = 32;
var_screen_info.right_margin = 326;
var_screen_info.upper_margin = 4;
var_screen_info.lower_margin = 12;
var_screen_info.hsync_len = 44;
var_screen_info.vsync_len = 1;
var_screen_info.sync = 0;
var_screen_info.vmode = 0;
var_screen_info.accel_flags = 0;
let mut fb = Framebuffer {
marker: AtomicU32::new(1),
device,
frame: mem_map,
default_font: collection.into_font().unwrap(),
var_screen_info,
fix_screen_info,
};
if !fb.put_var_screeninfo() {
panic!("FBIOPUT_VSCREENINFO failed");
}
return fb;
}
fn set_epdc_access(&mut self, state: bool) {
unsafe {
libc::ioctl(
self.device.as_raw_fd(),
if state {
MXCFB_ENABLE_EPDC_ACCESS
} else {
MXCFB_DISABLE_EPDC_ACCESS
},
);
};
}
fn set_autoupdate_mode(&mut self, mode: u32) {
unsafe {
libc::ioctl(
self.device.as_raw_fd(),
mxc_types::MXCFB_SET_AUTO_UPDATE_MODE,
&mut mode.clone(),
);
};
}
fn set_update_scheme(&mut self, scheme: u32) {
unsafe {
libc::ioctl(
self.device.as_raw_fd(),
mxc_types::MXCFB_SET_UPDATE_SCHEME,
&mut scheme.clone(),
);
};
}
fn get_fix_screeninfo(device: &File) -> FixScreeninfo {
let mut info: FixScreeninfo = Default::default();
let result = unsafe { ioctl(device.as_raw_fd(), FBIOGET_FSCREENINFO, &mut info) };
if result != 0 {
panic!("FBIOGET_FSCREENINFO failed");
}
return info;
}
fn get_var_screeninfo(device: &File) -> VarScreeninfo {
let mut info: VarScreeninfo = Default::default();
let result = unsafe { ioctl(device.as_raw_fd(), FBIOGET_VSCREENINFO, &mut info) };
if result != 0 {
panic!("FBIOGET_VSCREENINFO failed");
}
return info;
}
fn put_var_screeninfo(&mut self) -> bool {
let result = unsafe {
ioctl(
self.device.as_raw_fd(),
FBIOPUT_VSCREENINFO,
&mut self.var_screen_info,
)
};
return result == 0;
}
}