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Add function render_into to the renderer

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To be used for the Dear ImGui integration
This commit is contained in:
reo 2025-07-05 20:44:20 +03:00
parent 111c42a746
commit 76dabf2e63
1 changed files with 15 additions and 17 deletions
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32
src/render.rs
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@ -6,13 +6,6 @@ use glam::Vec3;
use hecs::World; use hecs::World;
use glium::glutin::surface::WindowSurface; use glium::glutin::surface::WindowSurface;
/// Generic rendering backend trait.
pub trait Renderer {
/// Render a single frame for the given `World`.
fn render(&mut self, world: &World);
}
/// Concrete OpenGL (glium) renderer implementing `Renderer`.
pub struct GliumRenderer { pub struct GliumRenderer {
display: glium::Display<WindowSurface>, display: glium::Display<WindowSurface>,
program: Program, program: Program,
@ -21,7 +14,6 @@ pub struct GliumRenderer {
} }
impl GliumRenderer { impl GliumRenderer {
/// Create a new OpenGL renderer consuming the provided `display`.
pub fn new(display: glium::Display<WindowSurface>) -> anyhow::Result<Self> { pub fn new(display: glium::Display<WindowSurface>) -> anyhow::Result<Self> {
const VERT: &str = include_str!("../resources/shaders/gl_solid_color.vert"); const VERT: &str = include_str!("../resources/shaders/gl_solid_color.vert");
const FRAG: &str = include_str!("../resources/shaders/gl_solid_color.frag"); const FRAG: &str = include_str!("../resources/shaders/gl_solid_color.frag");
@ -39,17 +31,12 @@ impl GliumRenderer {
Ok(Self { display, program, meshes: Vec::new(), params }) Ok(Self { display, program, meshes: Vec::new(), params })
} }
}
impl Renderer for GliumRenderer {
fn render(&mut self, world: &World) {
let mut frame = self.display.draw();
frame.clear_color_and_depth((0.1, 0.1, 0.15, 1.0), 1.0);
fn draw_scene<S: Surface>(&self, world: &World, target: &mut S) {
let cam = match world.query::<&Camera>().iter().next() { let cam = match world.query::<&Camera>().iter().next() {
Some((_, cam)) => *cam, Some((_, cam)) => *cam,
None => { None => {
eprintln!("[renderer] No camera component found – skipping frame"); eprintln!("[renderer] No camera component found. Skipping frame");
return; return;
} }
}; };
@ -65,10 +52,21 @@ impl Renderer for GliumRenderer {
light_dir: [light_dir.x, light_dir.y, light_dir.z], light_dir: [light_dir.x, light_dir.y, light_dir.z],
}; };
frame.draw(&mesh.vbuf, &mesh.ibuf, &self.program, &uniforms, &self.params) target
.unwrap(); .draw(&mesh.vbuf, &mesh.ibuf, &self.program, &uniforms, &self.params)
.unwrap();
} }
}
pub fn render_into<S: Surface>(&mut self, world: &World, target: &mut S) {
target.clear_color_and_depth((0.1, 0.1, 0.15, 1.0), 1.0);
self.draw_scene(world, target);
}
pub fn render(&mut self, world: &World) {
let mut frame = self.display.draw();
frame.clear_color_and_depth((0.1, 0.1, 0.15, 1.0), 1.0);
self.draw_scene(world, &mut frame);
frame.finish().unwrap(); frame.finish().unwrap();
} }
} }