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use crate::definitions::Renderer;
use anyhow::Result;
use wgpu::Features;
use winit::window::Window;
impl Renderer {
pub(crate) async fn new(window: &Window) -> Self {
let size = window.inner_size();
let instance = wgpu::Instance::new(wgpu::BackendBit::PRIMARY);
let surface = unsafe { instance.create_surface(window) };
let adapter = instance
.request_adapter(&wgpu::RequestAdapterOptions {
power_preference: wgpu::PowerPreference::LowPower,
compatible_surface: Some(&surface),
})
.await
.unwrap();
let (device, queue) = adapter
.request_device(
&wgpu::DeviceDescriptor {
label: Some("Device"),
features: Features::NON_FILL_POLYGON_MODE,
limits: wgpu::Limits::default(),
},
None,
)
.await
.unwrap();
let sc_desc = wgpu::SwapChainDescriptor {
usage: wgpu::TextureUsage::RENDER_ATTACHMENT,
format: wgpu::TextureFormat::Bgra8UnormSrgb,
width: size.width,
height: size.height,
present_mode: wgpu::PresentMode::Fifo,
};
let swap_chain = device.create_swap_chain(&surface, &sc_desc);
let texture_bind_group_layout =
device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
entries: &[
wgpu::BindGroupLayoutEntry {
binding: 0,
visibility: wgpu::ShaderStage::FRAGMENT,
ty: wgpu::BindingType::Texture {
sample_type: wgpu::TextureSampleType::Float { filterable: true },
view_dimension: wgpu::TextureViewDimension::D2,
multisampled: false,
},
count: None,
},
wgpu::BindGroupLayoutEntry {
binding: 1,
visibility: wgpu::ShaderStage::FRAGMENT,
ty: wgpu::BindingType::Sampler {
comparison: false,
filtering: true,
},
count: None,
},
],
label: Some("texture_bind_group_layout"),
});
let uniform_bind_group_layout =
device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
label: Some("uniform dynamic bind group layout"),
entries: &[],
});
Self {
surface,
device,
queue,
sc_desc,
swap_chain,
size,
texture_bind_group_layout,
uniform_bind_group_layout,
shaders: Vec::new(),
vertex_buffers: Vec::new(),
texture_bind_group: Vec::new(),
uniform_bind_group: Vec::new(),
render_pipelines: Vec::new(),
}
}
pub(crate) fn resize(&mut self, new_size: winit::dpi::PhysicalSize<u32>) {
self.size = new_size;
self.sc_desc.width = new_size.width;
self.sc_desc.height = new_size.height;
self.swap_chain = self.device.create_swap_chain(&self.surface, &self.sc_desc);
}
pub(crate) fn render(&mut self) -> Result<(), wgpu::SwapChainError> {
let frame = self.swap_chain.get_current_frame()?.output;
let mut encoder = self
.device
.create_command_encoder(&wgpu::CommandEncoderDescriptor {
label: Some("Render Encoder"),
});
let mut render_pass = encoder.begin_render_pass(&wgpu::RenderPassDescriptor {
label: Some("Render pass"),
color_attachments: &[wgpu::RenderPassColorAttachment {
view: &frame.view,
resolve_target: None,
ops: wgpu::Operations {
load: wgpu::LoadOp::Clear(wgpu::Color::BLACK),
store: true,
},
}],
depth_stencil_attachment: None,
});
let mut already_loaded_shader: usize = 5;
let mut already_loaded_buffer: usize = 5;
let mut already_loaded_texture: usize = 5;
let mut already_loaded_uniform_buffer: usize = 5;
for i in self.render_pipelines.iter() {
if already_loaded_shader != i.shader_index.clone() || i.shader_index.clone() == 0 {
render_pass.set_pipeline(
self.shaders.get(i.shader_index.clone()).expect(
format!("Couldn't find shader at index: {}", i.shader_index).as_str(),
),
);
already_loaded_shader = i.shader_index;
}
if already_loaded_texture != i.texture_index.clone() || i.texture_index.clone() == 0 {
render_pass.set_bind_group(
0,
self.texture_bind_group.get(i.texture_index.clone()).unwrap(),
&[],
);
already_loaded_texture = i.texture_index;
}
if i.uniform_index.is_some() {
let uniform_buffer_index = i.uniform_index.clone().unwrap();
let uniform_buffer_enum_option = self.uniform_bind_group.get(uniform_buffer_index);
if uniform_buffer_enum_option.is_some() {
let uniform_buffer = uniform_buffer_enum_option.expect(
format!(
"Uniform buffer group at {} doesn't exist",
uniform_buffer_index
)
.as_str(),
);
if already_loaded_uniform_buffer != uniform_buffer_index.clone()
|| uniform_buffer_index.clone() == 0
{
render_pass.set_bind_group(1, uniform_buffer, &[]);
already_loaded_uniform_buffer = uniform_buffer_index;
}
}
}
if already_loaded_buffer != i.vertex_buffer_index.clone()
|| i.vertex_buffer_index.clone() == 0
{
let buffers = self.vertex_buffers.get(i.vertex_buffer_index).unwrap();
render_pass.set_vertex_buffer(0, buffers.vertex_buffer.slice(..));
render_pass
.set_index_buffer(buffers.index_buffer.slice(..), wgpu::IndexFormat::Uint16);
render_pass.draw_indexed(0..buffers.length, 0, 0..1);
already_loaded_buffer = i.vertex_buffer_index;
}
}
drop(render_pass);
self.queue.submit(std::iter::once(encoder.finish()));
Ok(())
}
}