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@ -1,7 +1,7 @@
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//! Graphics Support for EPDs
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use crate::color::Color; |
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use embedded_graphics::prelude::*; |
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use embedded_graphics::{pixelcolor::BinaryColor, prelude::*}; |
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/// Displayrotation
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#[derive(Clone, Copy)] |
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@ -22,7 +22,7 @@ impl Default for DisplayRotation {
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} |
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} |
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pub trait Display: Drawing<Color> { |
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pub trait Display: DrawTarget<BinaryColor> { |
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/// Clears the buffer of the display with the chosen background color
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fn clear_buffer(&mut self, background_color: Color) { |
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for elem in self.get_mut_buffer().iter_mut() { |
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@ -45,31 +45,36 @@ pub trait Display: Drawing<Color> {
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/// Helperfunction for the Embedded Graphics draw trait
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///
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/// Becomes uneccesary when const_generics become stablised
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fn draw_helper<T>(&mut self, width: u32, height: u32, item_pixels: T) |
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where |
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T: IntoIterator<Item = Pixel<Color>>, |
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{ |
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fn draw_helper( |
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&mut self, |
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width: u32, |
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height: u32, |
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pixel: Pixel<BinaryColor>, |
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) -> Result<(), Self::Error> { |
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let rotation = self.rotation(); |
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let buffer = self.get_mut_buffer(); |
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for Pixel(UnsignedCoord(x, y), color) in item_pixels { |
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if outside_display(x, y, width, height, rotation) { |
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continue; |
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let Pixel(point, color) = pixel; |
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if outside_display(point, width, height, rotation) { |
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return Ok(()); |
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} |
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// Give us index inside the buffer and the bit-position in that u8 which needs to be changed
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let (index, bit) = find_position(x, y, width, height, rotation); |
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let (index, bit) = find_position(point.x as u32, point.y as u32, width, height, rotation); |
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let index = index as usize; |
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// "Draw" the Pixel on that bit
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match color { |
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Color::Black => { |
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// Black
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BinaryColor::On => { |
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buffer[index] &= !bit; |
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} |
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Color::White => { |
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// White
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BinaryColor::Off => { |
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buffer[index] |= bit; |
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} |
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} |
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} |
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Ok(()) |
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} |
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} |
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@ -83,8 +88,10 @@ pub trait Display: Drawing<Color> {
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/// # use epd_waveshare::epd2in9::DEFAULT_BACKGROUND_COLOR;
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/// # use epd_waveshare::prelude::*;
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/// # use epd_waveshare::graphics::VarDisplay;
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/// # use epd_waveshare::color::Black;
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/// # use embedded_graphics::prelude::*;
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/// # use embedded_graphics::primitives::{Circle, Line};
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/// # use embedded_graphics::style::PrimitiveStyle;
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/// let width = 128;
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/// let height = 296;
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///
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@ -93,11 +100,9 @@ pub trait Display: Drawing<Color> {
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///
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/// display.set_rotation(DisplayRotation::Rotate90);
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///
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/// display.draw(
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/// Line::new(Coord::new(0, 120), Coord::new(0, 295))
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/// .stroke(Some(Color::Black))
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/// .into_iter(),
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/// );
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/// let _ = Line::new(Point::new(0, 120), Point::new(0, 295))
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/// .into_styled(PrimitiveStyle::with_stroke(Black, 1))
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/// .draw(&mut display);
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/// ```
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pub struct VarDisplay<'a> { |
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width: u32, |
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@ -119,12 +124,15 @@ impl<'a> VarDisplay<'a> {
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} |
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} |
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impl<'a> Drawing<Color> for VarDisplay<'a> { |
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fn draw<T>(&mut self, item_pixels: T) |
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where |
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T: IntoIterator<Item = Pixel<Color>>, |
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{ |
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self.draw_helper(self.width, self.height, item_pixels); |
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impl<'a> DrawTarget<BinaryColor> for VarDisplay<'a> { |
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type Error = core::convert::Infallible; |
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fn draw_pixel(&mut self, pixel: Pixel<BinaryColor>) -> Result<(), Self::Error> { |
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self.draw_helper(self.width, self.height, pixel) |
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} |
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fn size(&self) -> Size { |
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Size::new(self.width, self.height) |
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} |
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} |
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@ -147,7 +155,11 @@ impl<'a> Display for VarDisplay<'a> {
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} |
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// Checks if a pos is outside the defined display
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fn outside_display(x: u32, y: u32, width: u32, height: u32, rotation: DisplayRotation) -> bool { |
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fn outside_display(p: Point, width: u32, height: u32, rotation: DisplayRotation) -> bool { |
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if p.x < 0 || p.y < 0 { |
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return true; |
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} |
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let (x, y) = (p.x as u32, p.y as u32); |
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match rotation { |
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DisplayRotation::Rotate0 | DisplayRotation::Rotate180 => { |
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if x >= width || y >= height { |
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@ -189,10 +201,9 @@ fn find_position(x: u32, y: u32, width: u32, height: u32, rotation: DisplayRotat
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#[cfg(test)] |
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mod tests { |
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use super::{find_position, outside_display, Display, DisplayRotation, VarDisplay}; |
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use crate::color::Black; |
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use crate::color::Color; |
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use embedded_graphics::coord::Coord; |
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use embedded_graphics::prelude::*; |
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use embedded_graphics::primitives::Line; |
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use embedded_graphics::{prelude::*, primitives::Line, style::PrimitiveStyle}; |
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#[test] |
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fn buffer_clear() { |
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@ -228,7 +239,7 @@ mod tests {
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for x in 0..(width + height) { |
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//limit x because it runs too long
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for y in 0..(u32::max_value()) { |
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if outside_display(x, y, width, height, rotation2) { |
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if outside_display(Point::new(x as i32, y as i32), width, height, rotation2) { |
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break; |
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} else { |
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let (idx, _) = find_position(x, y, width, height, rotation2); |
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@ -247,11 +258,9 @@ mod tests {
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let mut buffer = [DEFAULT_BACKGROUND_COLOR.get_byte_value(); 128 / 8 * 296]; |
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let mut display = VarDisplay::new(width, height, &mut buffer); |
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display.draw( |
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Line::new(Coord::new(0, 0), Coord::new(7, 0)) |
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.stroke(Some(Color::Black)) |
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.into_iter(), |
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); |
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let _ = Line::new(Point::new(0, 0), Point::new(7, 0)) |
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.into_styled(PrimitiveStyle::with_stroke(Black, 1)) |
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.draw(&mut display); |
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let buffer = display.buffer(); |
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@ -273,11 +282,9 @@ mod tests {
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display.set_rotation(DisplayRotation::Rotate90); |
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display.draw( |
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Line::new(Coord::new(0, 120), Coord::new(0, 295)) |
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.stroke(Some(Color::Black)) |
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.into_iter(), |
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); |
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let _ = Line::new(Point::new(0, 120), Point::new(0, 295)) |
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.into_styled(PrimitiveStyle::with_stroke(Black, 1)) |
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.draw(&mut display); |
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let buffer = display.buffer(); |
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Caemor
6 years ago