struct Canvas {
width: usize,
height: usize,
buffer: Vec<Pixel>,
}
Expand description
Canvas which is used for simple line drawing operations.
The coordinate system is the following:
0 x –––––––→ | | | | | | y↓
Fields§
§width: usize
Canvas width.
height: usize
Canvas height.
buffer: Vec<Pixel>
Canvas buffer we draw on.
Implementations§
source§impl Canvas
impl Canvas
sourcefn new(width: usize, height: usize) -> Self
fn new(width: usize, height: usize) -> Self
Builds new Canvas
for line drawing with the given width
and height
with default color.
sourcefn buffer_mut(&mut self) -> &mut [Pixel]
fn buffer_mut(&mut self) -> &mut [Pixel]
Canvas underlying buffer for direct manipulation
sourcefn h_line_bounds(&self, y: f32, stroke_size: usize) -> (f32, f32)
fn h_line_bounds(&self, y: f32, stroke_size: usize) -> (f32, f32)
Gives bounds for horizontal straight line on y
with stroke_size
.
sourcefn v_line_bounds(&self, x: f32, stroke_size: usize) -> (f32, f32)
fn v_line_bounds(&self, x: f32, stroke_size: usize) -> (f32, f32)
Gives bounds for vertical straight line on y
with stroke_size
.
sourcefn flip_horizontal(&mut self)
fn flip_horizontal(&mut self)
Flip horizontally.
sourcefn draw_h_line(&mut self, x: f32, y: f32, size: f32, stroke_size: usize)
fn draw_h_line(&mut self, x: f32, y: f32, size: f32, stroke_size: usize)
Draws a horizontal straight line from (x
, y
) of size
with the given stroke_size
.
sourcefn draw_v_line(&mut self, x: f32, y: f32, size: f32, stroke_size: usize)
fn draw_v_line(&mut self, x: f32, y: f32, size: f32, stroke_size: usize)
Draws a vertical straight line from (x
, y
) of size
with the given stroke_size
.
sourcefn draw_rect(&mut self, x: f32, y: f32, width: f32, height: f32, color: Pixel)
fn draw_rect(&mut self, x: f32, y: f32, width: f32, height: f32, color: Pixel)
Draws a rect from the (x
, y
) of the given width
and height
using color
.
sourcefn put_pixel(&mut self, x: f32, y: f32, color: Pixel)
fn put_pixel(&mut self, x: f32, y: f32, color: Pixel)
Put pixel into buffer with the given color if the color is brighter than the one buffer already has in place.
sourcefn draw_line(&mut self, from_x: f32, from_y: f32, to_x: f32, to_y: f32)
fn draw_line(&mut self, from_x: f32, from_y: f32, to_x: f32, to_y: f32)
Xiaolin Wu’s line drawing from (from_x
, from_y
) to (to_x
, to_y
).
sourcefn draw_ellipse_arc(&mut self, stroke_size: usize)
fn draw_ellipse_arc(&mut self, stroke_size: usize)
Draws a part of an ellipse centered in (0., 0.)
with self.x_center()
and self.y_center
vertex and co-vertex respectively using a given stroke
in the bottom-right quadrant of the
Canvas
coordinate system.
Auto Trait Implementations§
impl RefUnwindSafe for Canvas
impl Send for Canvas
impl Sync for Canvas
impl Unpin for Canvas
impl UnwindSafe for Canvas
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
source§impl<T> Downcast for Twhere
T: Any,
impl<T> Downcast for Twhere
T: Any,
source§fn into_any(self: Box<T>) -> Box<dyn Any>
fn into_any(self: Box<T>) -> Box<dyn Any>
Box<dyn Trait>
(where Trait: Downcast
) to Box<dyn Any>
. Box<dyn Any>
can
then be further downcast
into Box<ConcreteType>
where ConcreteType
implements Trait
.source§fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>
fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>
Rc<Trait>
(where Trait: Downcast
) to Rc<Any>
. Rc<Any>
can then be
further downcast
into Rc<ConcreteType>
where ConcreteType
implements Trait
.source§fn as_any(&self) -> &(dyn Any + 'static)
fn as_any(&self) -> &(dyn Any + 'static)
&Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &Any
’s vtable from &Trait
’s.source§fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
&mut Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &mut Any
’s vtable from &mut Trait
’s.