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Add a Buffer::present_with_damage() method

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Supported on Wayland, X11, and Win32.

Fixes https://github.com/rust-windowing/softbuffer/issues/39.

try_for_each
This commit is contained in:
Ian Douglas Scott 2023-04-21 10:37:48 -07:00
parent f12aa534e1
commit c1d6716eec
7 changed files with 186 additions and 78 deletions
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59
src/win32.rs
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@ -2,7 +2,7 @@
//!
//! This module converts the input buffer into a bitmap and then stretches it to the window.
use crate::SoftBufferError;
use crate::{Rect, SoftBufferError};
use raw_window_handle::Win32WindowHandle;
use std::io;
@ -202,6 +202,36 @@ impl Win32Impl {
Ok(BufferImpl(self))
}
fn present_with_damage(&self, damage: &[Rect]) -> Result<(), SoftBufferError> {
let buffer = self.buffer.as_ref().unwrap();
unsafe {
for Rect {
x,
y,
width,
height,
} in damage
{
Gdi::BitBlt(
self.dc,
*x,
*y,
*width,
*height,
buffer.dc,
*x,
*y,
Gdi::SRCCOPY,
);
}
// Validate the window.
Gdi::ValidateRect(self.window, ptr::null_mut());
}
Ok(())
}
}
pub struct BufferImpl<'a>(&'a mut Win32Impl);
@ -220,23 +250,16 @@ impl<'a> BufferImpl<'a> {
pub fn present(self) -> Result<(), SoftBufferError> {
let imp = self.0;
let buffer = imp.buffer.as_ref().unwrap();
unsafe {
Gdi::BitBlt(
imp.dc,
0,
0,
buffer.width.get(),
buffer.height.get(),
buffer.dc,
0,
0,
Gdi::SRCCOPY,
);
imp.present_with_damage(&[Rect {
x: 0,
y: 0,
width: buffer.width.get(),
height: buffer.height.get(),
}])
}
// Validate the window.
Gdi::ValidateRect(imp.window, ptr::null_mut());
}
Ok(())
pub fn present_with_damage(self, damage: &[Rect]) -> Result<(), SoftBufferError> {
let imp = self.0;
imp.present_with_damage(damage)
}
}