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|
use crate::{quad, Background, Primitive, Quad, Transformation};
use iced_native::{renderer::Debugger, Color, Layout, Point, Widget};
use raw_window_handle::HasRawWindowHandle;
use wgpu::{
Adapter, BackendBit, CommandEncoderDescriptor, Device, DeviceDescriptor,
Extensions, Limits, PowerPreference, Queue, RequestAdapterOptions, Surface,
SwapChain, SwapChainDescriptor, TextureFormat, TextureUsage,
};
use wgpu_glyph::{GlyphBrush, GlyphBrushBuilder, Section};
use std::{cell::RefCell, rc::Rc};
mod button;
mod checkbox;
mod column;
mod image;
mod radio;
mod row;
mod slider;
mod text;
pub struct Renderer {
surface: Surface,
adapter: Adapter,
device: Device,
queue: Queue,
quad_pipeline: quad::Pipeline,
quads: Vec<Quad>,
glyph_brush: Rc<RefCell<GlyphBrush<'static, ()>>>,
}
pub struct Target {
width: u16,
height: u16,
transformation: Transformation,
swap_chain: SwapChain,
}
impl Renderer {
pub fn new<W: HasRawWindowHandle>(window: &W) -> Self {
let adapter = Adapter::request(&RequestAdapterOptions {
power_preference: PowerPreference::LowPower,
backends: BackendBit::all(),
})
.expect("Request adapter");
let (mut device, queue) = adapter.request_device(&DeviceDescriptor {
extensions: Extensions {
anisotropic_filtering: false,
},
limits: Limits { max_bind_groups: 1 },
});
let surface = Surface::create(window);
// TODO: Think about font loading strategy
// Loading system fonts with fallback may be a good idea
let font: &[u8] =
include_bytes!("../../examples/resources/Roboto-Regular.ttf");
let glyph_brush = GlyphBrushBuilder::using_font_bytes(font)
.build(&mut device, TextureFormat::Bgra8UnormSrgb);
let quad_pipeline = quad::Pipeline::new(&mut device);
Self {
surface,
adapter,
device,
queue,
quad_pipeline,
quads: Vec::new(),
glyph_brush: Rc::new(RefCell::new(glyph_brush)),
}
}
pub fn target(&self, width: u16, height: u16) -> Target {
Target {
width,
height,
transformation: Transformation::orthographic(width, height),
swap_chain: self.device.create_swap_chain(
&self.surface,
&SwapChainDescriptor {
usage: TextureUsage::OUTPUT_ATTACHMENT,
format: TextureFormat::Bgra8UnormSrgb,
width: u32::from(width),
height: u32::from(height),
present_mode: wgpu::PresentMode::Vsync,
},
),
}
}
pub fn draw(&mut self, target: &mut Target, primitive: &Primitive) {
log::debug!("Drawing");
let frame = target.swap_chain.get_next_texture();
let mut encoder = self
.device
.create_command_encoder(&CommandEncoderDescriptor { todo: 0 });
let _ = encoder.begin_render_pass(&wgpu::RenderPassDescriptor {
color_attachments: &[wgpu::RenderPassColorAttachmentDescriptor {
attachment: &frame.view,
resolve_target: None,
load_op: wgpu::LoadOp::Clear,
store_op: wgpu::StoreOp::Store,
clear_color: wgpu::Color {
r: 1.0,
g: 1.0,
b: 1.0,
a: 1.0,
},
}],
depth_stencil_attachment: None,
});
self.draw_primitive(primitive);
self.quad_pipeline.draw(
&mut self.device,
&mut encoder,
&self.quads,
target.transformation,
&frame.view,
);
self.quads.clear();
self.glyph_brush
.borrow_mut()
.draw_queued(
&mut self.device,
&mut encoder,
&frame.view,
u32::from(target.width),
u32::from(target.height),
)
.expect("Draw text");
self.queue.submit(&[encoder.finish()]);
}
fn draw_primitive(&mut self, primitive: &Primitive) {
match primitive {
Primitive::None => {}
Primitive::Group { primitives } => {
// TODO: Inspect a bit and regroup (?)
for primitive in primitives {
self.draw_primitive(primitive)
}
}
Primitive::Text {
content,
bounds,
size,
} => self.glyph_brush.borrow_mut().queue(Section {
text: &content,
screen_position: (bounds.x, bounds.y),
bounds: (bounds.width, bounds.height),
scale: wgpu_glyph::Scale { x: *size, y: *size },
..Default::default()
}),
Primitive::Quad { bounds, background } => {
self.quads.push(Quad {
position: [bounds.x, bounds.y],
scale: [bounds.width, bounds.height],
color: match background {
Background::Color(color) => color.into_linear(),
},
});
}
}
}
}
impl iced_native::Renderer for Renderer {
// TODO: Add `MouseCursor` here (?)
type Primitive = Primitive;
}
impl Debugger for Renderer {
fn explain<Message>(
&mut self,
widget: &dyn Widget<Message, Self>,
layout: Layout<'_>,
cursor_position: Point,
_color: Color,
) -> Self::Primitive {
// TODO: Include a bordered box to display layout bounds
widget.draw(self, layout, cursor_position)
}
}
|
