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Merge pull request #22 from ferristseng/own-buffer

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Allow GraphicDisplay to take ownership of Buffer
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Wesley Moore 2022-03-03 08:05:30 +10:00 committed by GitHub
commit 65c0685002
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1 changed files with 24 additions and 23 deletions
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47
src/graphics.rs
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@ -1,5 +1,8 @@
use color::Color;
use core::ops::{Deref, DerefMut};
use core::{
convert::AsMut,
ops::{Deref, DerefMut},
};
use display::{Display, Rotation};
use hal;
use interface::DisplayInterface;
@ -9,28 +12,25 @@ use interface::DisplayInterface;
/// When the `graphics` feature is enabled `GraphicDisplay` implements the `Draw` trait from
/// [embedded-graphics](https://crates.io/crates/embedded-graphics). This allows basic shapes and
/// text to be drawn on the display.
pub struct GraphicDisplay<'a, I>
pub struct GraphicDisplay<'a, I, B = &'a mut [u8]>
where
I: DisplayInterface,
{
display: Display<'a, I>,
black_buffer: &'a mut [u8],
red_buffer: &'a mut [u8],
black_buffer: B,
red_buffer: B,
}
impl<'a, I> GraphicDisplay<'a, I>
impl<'a, I, B> GraphicDisplay<'a, I, B>
where
I: DisplayInterface,
B: AsMut<[u8]>,
{
/// Promote a `Display` to a `GraphicDisplay`.
///
/// B/W and Red buffers for drawing into must be supplied. These should be `rows` * `cols` in
/// length.
pub fn new(
display: Display<'a, I>,
black_buffer: &'a mut [u8],
red_buffer: &'a mut [u8],
) -> Self {
pub fn new(display: Display<'a, I>, black_buffer: B, red_buffer: B) -> Self {
GraphicDisplay {
display,
black_buffer,
@ -44,7 +44,7 @@ where
delay: &mut D,
) -> Result<(), I::Error> {
self.display
.update(self.black_buffer, self.red_buffer, delay)
.update(self.black_buffer.as_mut(), self.red_buffer.as_mut(), delay)
}
/// Clear the buffers, filling them a single color.
@ -55,12 +55,12 @@ where
Color::Red => (0xFF, 0xFF),
};
for byte in &mut self.black_buffer.iter_mut() {
for byte in &mut self.black_buffer.as_mut().iter_mut() {
*byte = black; // background_color.get_byte_value();
}
// TODO: Combine loops
for byte in &mut self.red_buffer.iter_mut() {
for byte in &mut self.red_buffer.as_mut().iter_mut() {
*byte = red; // background_color.get_byte_value();
}
}
@ -77,22 +77,22 @@ where
match color {
Color::Black => {
self.black_buffer[index] &= !bit;
self.red_buffer[index] &= !bit;
self.black_buffer.as_mut()[index] &= !bit;
self.red_buffer.as_mut()[index] &= !bit;
}
Color::White => {
self.black_buffer[index] |= bit;
self.red_buffer[index] &= !bit;
self.black_buffer.as_mut()[index] |= bit;
self.red_buffer.as_mut()[index] &= !bit;
}
Color::Red => {
self.black_buffer[index] |= bit;
self.red_buffer[index] |= bit;
self.black_buffer.as_mut()[index] |= bit;
self.red_buffer.as_mut()[index] |= bit;
}
}
}
}
impl<'a, I> Deref for GraphicDisplay<'a, I>
impl<'a, I, B> Deref for GraphicDisplay<'a, I, B>
where
I: DisplayInterface,
{
@ -103,7 +103,7 @@ where
}
}
impl<'a, I> DerefMut for GraphicDisplay<'a, I>
impl<'a, I, B> DerefMut for GraphicDisplay<'a, I, B>
where
I: DisplayInterface,
{
@ -130,9 +130,10 @@ extern crate embedded_graphics;
use self::embedded_graphics::prelude::*;
#[cfg(feature = "graphics")]
impl<'a, I> DrawTarget for GraphicDisplay<'a, I>
impl<'a, I, B> DrawTarget for GraphicDisplay<'a, I, B>
where
I: DisplayInterface,
B: AsMut<[u8]>,
{
type Color = Color;
type Error = core::convert::Infallible;
@ -154,7 +155,7 @@ where
}
#[cfg(feature = "graphics")]
impl<'a, I> OriginDimensions for GraphicDisplay<'a, I>
impl<'a, I, B> OriginDimensions for GraphicDisplay<'a, I, B>
where
I: DisplayInterface,
{