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use crate::window::GraphicsContext;
use buffer::Buffer;
use geometry::HasDimensions;
use raw_window_handle::XlibHandle;
use std::os::raw::{c_char, c_uint};
use x11_dl::xlib::{Display, Visual, Xlib, ZPixmap, GC};
pub struct X11GraphicsContext {
handle: XlibHandle,
lib: Xlib,
gc: GC,
visual: *mut Visual,
depth: i32,
}
impl X11GraphicsContext {
pub unsafe fn new(handle: XlibHandle) -> Self {
let lib = match Xlib::open() {
Ok(lib) => lib,
Err(e) => panic!("{:?}", e),
};
let screen = (lib.XDefaultScreen)(handle.display as *mut Display);
let gc = (lib.XDefaultGC)(handle.display as *mut Display, screen);
let visual = (lib.XDefaultVisual)(handle.display as *mut Display, screen);
let depth = (lib.XDefaultDepth)(handle.display as *mut Display, screen);
Self { handle, lib, gc, visual, depth }
}
}
impl GraphicsContext for X11GraphicsContext {
unsafe fn blit(&mut self, buffer: &Buffer) {
let array = buffer.as_u32_slice();
let dimensions = buffer.dimensions();
//create image
let image = (self.lib.XCreateImage)(
self.handle.display as *mut Display,
self.visual,
self.depth as u32,
ZPixmap,
0,
(array.as_ptr()) as *mut c_char,
dimensions.width as u32,
dimensions.height as u32,
32,
(dimensions.width * 4) as i32,
);
//push image to window
(self.lib.XPutImage)(
self.handle.display as *mut Display,
self.handle.window,
self.gc,
image,
0,
0,
0,
0,
dimensions.width as c_uint,
dimensions.height as c_uint,
);
(*image).data = std::ptr::null_mut();
(self.lib.XDestroyImage)(image);
}
}
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