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use std::rc::Rc;
use crate::glm::{self, Mat4};
use crate::graphics::opengl::{GLDevice, GLFramebuffer};
use crate::graphics::{DrawParams, Drawable, Texture};
use crate::Context;
#[derive(Debug, Clone, PartialEq)]
pub struct Canvas {
pub(crate) texture: Texture,
pub(crate) framebuffer: Rc<GLFramebuffer>,
pub(crate) projection: Mat4,
}
impl Canvas {
pub fn new(ctx: &mut Context, width: i32, height: i32) -> Canvas {
Canvas::with_device(&mut ctx.gl, width, height, true)
}
pub(crate) fn with_device(
device: &mut GLDevice,
width: i32,
height: i32,
rebind_previous: bool,
) -> Canvas {
let texture = Texture::with_device_empty(device, width, height);
let framebuffer = device.new_framebuffer();
device.attach_texture_to_framebuffer(&framebuffer, &texture.handle, rebind_previous);
Canvas {
texture,
framebuffer: Rc::new(framebuffer),
projection: glm::ortho(0.0, width as f32, 0.0, height as f32, -1.0, 1.0),
}
}
pub fn width(&self) -> i32 {
self.texture.width()
}
pub fn height(&self) -> i32 {
self.texture.height()
}
pub fn texture(&self) -> &Texture {
&self.texture
}
}
impl Drawable for Canvas {
fn draw<P>(&self, ctx: &mut Context, params: P)
where
P: Into<DrawParams>,
{
self.texture.draw(ctx, params)
}
}