From b0adf7748db65b9aea12a7048ebb1c27bc943b3d Mon Sep 17 00:00:00 2001 From: Dennis Ranke Date: Fri, 8 Jul 2022 22:11:00 +0200 Subject: [PATCH] add uw8-window crate --- uw8-window/.gitignore | 1 + uw8-window/Cargo.lock | 1697 +++++++++++++++++++++++++++++++++++ uw8-window/Cargo.toml | 17 + uw8-window/src/cpu.rs | 53 ++ uw8-window/src/crt.wgsl | 78 ++ uw8-window/src/gpu.rs | 466 ++++++++++ uw8-window/src/lib.rs | 19 + uw8-window/src/main.rs | 40 + uw8-window/src/palette.wgsl | 24 + 9 files changed, 2395 insertions(+) create mode 100644 uw8-window/.gitignore create mode 100644 uw8-window/Cargo.lock create mode 100644 uw8-window/Cargo.toml create mode 100644 uw8-window/src/cpu.rs create mode 100644 uw8-window/src/crt.wgsl create mode 100644 uw8-window/src/gpu.rs create mode 100644 uw8-window/src/lib.rs create mode 100644 uw8-window/src/main.rs create mode 100644 uw8-window/src/palette.wgsl diff --git a/uw8-window/.gitignore b/uw8-window/.gitignore new file mode 100644 index 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--- /dev/null +++ b/uw8-window/src/cpu.rs @@ -0,0 +1,53 @@ +use std::time::Instant; + +use crate::Framebuffer; +use minifb::{Key, Window, WindowOptions}; + +pub fn run(mut update: Box Instant + 'static>) -> ! { + #[cfg(target_os = "windows")] + unsafe { + winapi::um::timeapi::timeBeginPeriod(1); + } + + let mut buffer: Vec = vec![0; 320 * 240]; + + let options = WindowOptions { + scale: minifb::Scale::X2, + scale_mode: minifb::ScaleMode::AspectRatioStretch, + resize: true, + ..Default::default() + }; + let mut window = Window::new("MicroW8", 320, 240, options).unwrap(); + + let mut next_frame = Instant::now(); + while window.is_open() && !window.is_key_down(Key::Escape) { + if let Some(sleep) = next_frame.checked_duration_since(Instant::now()) { + std::thread::sleep(sleep); + } + next_frame = update( + &mut CpuFramebuffer { + buffer: &mut buffer, + }, + 0, + false, + ); + window.update_with_buffer(&buffer, 320, 240).unwrap(); + } + std::process::exit(0); +} + +struct CpuFramebuffer<'a> { + buffer: &'a mut Vec, +} + +impl<'a> Framebuffer for CpuFramebuffer<'a> { + fn update(&mut self, framebuffer: &[u8], palette: &[u8]) { + for (i, &color_index) in framebuffer.iter().enumerate() { + let offset = color_index as usize * 4; + self.buffer[i] = 0xff000000 + | ((palette[offset] as u32) << 16) + | ((palette[offset + 1] as u32) << 8) + | palette[offset + 2] as u32; + } + } +} diff --git a/uw8-window/src/crt.wgsl b/uw8-window/src/crt.wgsl new file mode 100644 index 0000000..569568b --- /dev/null +++ b/uw8-window/src/crt.wgsl @@ -0,0 +1,78 @@ +struct VertexOutput { + @builtin(position) clip_position: vec4, + @location(0) tex_coords: vec2, +} + +struct Uniforms { + texture_scale: vec4, +} + +@group(0) @binding(1) var uniforms: Uniforms; + +@vertex +fn vs_main( + @builtin(vertex_index) in_vertex_index: u32, +) -> VertexOutput { + var out: VertexOutput; + let x = (1.0 - f32(in_vertex_index)) * 3.0; + let y = f32(in_vertex_index & 1u) * 3.0 - 1.0; + out.clip_position = vec4(x, y, 0.0, 1.0); + out.tex_coords = vec2(x, y) * uniforms.texture_scale.xy + vec2(160.0, 120.0); + return out; +} + +@group(0) @binding(0) var screen_texture: texture_2d; + +fn sample_pixel(coords: vec2, offset: vec4) -> vec3 { + let is_outside = any(vec2(coords) >= vec2(320u, 240u)); + if(is_outside) { + return vec3(0.0); + } else { + let f = max(vec4(0.01) / offset - vec4(0.003), vec4(0.0)); + return textureLoad(screen_texture, coords, 0).rgb * (f.x + f.y + f.z + f.w); + } +} + +@fragment +fn fs_main(in: VertexOutput) -> @location(0) vec4 { + let pixel = floor(in.tex_coords); + let o = vec2(0.5) - (in.tex_coords - pixel); + let pixel = vec2(pixel); + + if(pixel.x < -1 || pixel.y < -1 || pixel.x > 320 || pixel.y > 240) { + return vec4(0.0, 0.0, 0.0, 1.0); + } + + let offset_x = o.xxxx + vec4(-0.125, 0.375, 0.125, -0.375) * uniforms.texture_scale.z; + let offset_y = o.yyyy + vec4(-0.375, -0.125, 0.375, 0.125) * uniforms.texture_scale.z; + + let offset_x0 = max(abs(offset_x + vec4(-1.0)) - vec4(0.5), vec4(0.0)); + let offset_x1 = max(abs(offset_x) - vec4(0.5), vec4(0.0)); + let offset_x2 = max(abs(offset_x + vec4(1.0)) - vec4(0.5), vec4(0.0)); + + let offset_x0 = offset_x0 * offset_x0; + let offset_x1 = offset_x1 * offset_x1; + let offset_x2 = offset_x2 * offset_x2; + + let offset_yr = offset_y + vec4(-1.0); + let offset_yr = vec4(0.02) + offset_yr * offset_yr; + + var acc = sample_pixel(pixel + vec2(-1, -1), offset_x0 + offset_yr); + acc = acc + sample_pixel(pixel + vec2(0, -1), offset_x1 + offset_yr); + acc = acc + sample_pixel(pixel + vec2(1, -1), offset_x2 + offset_yr); + + let offset_yr = vec4(0.02) + offset_y * offset_y; + + acc = acc + sample_pixel(pixel + vec2(-1, 0), offset_x0 + offset_yr); + acc = acc + sample_pixel(pixel, offset_x1 + offset_yr); + acc = acc + sample_pixel(pixel + vec2(1, 0), offset_x2 + offset_yr); + + let offset_yr = offset_y + vec4(1.0); + let offset_yr = vec4(0.02) + offset_yr * offset_yr; + + acc = acc + sample_pixel(pixel + vec2(-1, 1), offset_x0 + offset_yr); + acc = acc + sample_pixel(pixel + vec2(0, 1), offset_x1 + offset_yr); + acc = acc + sample_pixel(pixel + vec2(1, 1), offset_x2 + offset_yr); + + return vec4(acc, 1.0); +} \ No newline at end of file diff --git a/uw8-window/src/gpu.rs b/uw8-window/src/gpu.rs new file mode 100644 index 0000000..5895bf4 --- /dev/null +++ b/uw8-window/src/gpu.rs @@ -0,0 +1,466 @@ +use crate::Framebuffer; +use anyhow::{anyhow, Result}; +use std::{num::NonZeroU32, time::Instant}; + +use wgpu::util::DeviceExt; +use winit::{ + dpi::PhysicalSize, + event::{Event, VirtualKeyCode, WindowEvent}, + event_loop::{ControlFlow, EventLoop}, + window::{Fullscreen, WindowBuilder}, +}; + +pub struct Window { + event_loop: EventLoop<()>, + window: winit::window::Window, + instance: wgpu::Instance, + surface: wgpu::Surface, + adapter: wgpu::Adapter, + device: wgpu::Device, + queue: wgpu::Queue, +} + +impl Window { + pub fn new() -> Result { + async fn create() -> Result { + let event_loop = EventLoop::new(); + let window = WindowBuilder::new() + .with_inner_size(PhysicalSize::new(640u32, 480)) + .with_min_inner_size(PhysicalSize::new(320u32, 240)) + .with_title("MicroW8") + .build(&event_loop)?; + + window.set_cursor_visible(false); + + let instance = wgpu::Instance::new(wgpu::Backends::all()); + let surface = unsafe { instance.create_surface(&window) }; + let adapter = instance + .request_adapter(&wgpu::RequestAdapterOptions { + power_preference: wgpu::PowerPreference::LowPower, + compatible_surface: Some(&surface), + force_fallback_adapter: false, + }) + .await + .ok_or_else(|| anyhow!("Request adapter failed"))?; + + let (device, queue) = adapter + .request_device(&wgpu::DeviceDescriptor::default(), None) + .await?; + + Ok(Window { + event_loop, + window, + instance, + surface, + adapter, + device, + queue, + }) + } + + pollster::block_on(create()) + } + + pub fn run( + self, + mut update: Box Instant + 'static>, + ) -> ! { + let Window { + event_loop, + window, + instance, + surface, + adapter, + device, + queue, + } = self; + let framebuffer_texture = device.create_texture(&wgpu::TextureDescriptor { + size: wgpu::Extent3d { + width: 320, + height: 240, + depth_or_array_layers: 1, + }, + mip_level_count: 1, + sample_count: 1, + dimension: wgpu::TextureDimension::D2, + format: wgpu::TextureFormat::R8Uint, + usage: wgpu::TextureUsages::TEXTURE_BINDING | wgpu::TextureUsages::COPY_DST, + label: None, + }); + + let palette_texture = device.create_texture(&wgpu::TextureDescriptor { + size: wgpu::Extent3d { + width: 256, + height: 1, + depth_or_array_layers: 1, + }, + mip_level_count: 1, + sample_count: 1, + dimension: wgpu::TextureDimension::D1, + format: wgpu::TextureFormat::Rgba8UnormSrgb, + usage: wgpu::TextureUsages::TEXTURE_BINDING | wgpu::TextureUsages::COPY_DST, + label: None, + }); + + let screen_texture = device.create_texture(&wgpu::TextureDescriptor { + size: wgpu::Extent3d { + width: 320, + height: 240, + depth_or_array_layers: 1, + }, + mip_level_count: 1, + sample_count: 1, + dimension: wgpu::TextureDimension::D2, + format: wgpu::TextureFormat::Rgba8UnormSrgb, + usage: wgpu::TextureUsages::TEXTURE_BINDING | wgpu::TextureUsages::RENDER_ATTACHMENT, + label: None, + }); + + let framebuffer_texture_view = + framebuffer_texture.create_view(&wgpu::TextureViewDescriptor::default()); + let palette_texture_view = + palette_texture.create_view(&wgpu::TextureViewDescriptor::default()); + let screen_texture_view = + screen_texture.create_view(&wgpu::TextureViewDescriptor::default()); + + let mut uniforms = Uniforms { + texture_scale: texture_scale_from_resolution(window.inner_size()), + }; + + let uniform_buffer = device.create_buffer_init(&wgpu::util::BufferInitDescriptor { + label: None, + contents: bytemuck::cast_slice(&[uniforms]), + usage: wgpu::BufferUsages::UNIFORM | wgpu::BufferUsages::COPY_DST, + }); + + let palette_bind_group_layout = + device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor { + entries: &[ + wgpu::BindGroupLayoutEntry { + binding: 0, + visibility: wgpu::ShaderStages::FRAGMENT, + ty: wgpu::BindingType::Texture { + multisampled: false, + view_dimension: wgpu::TextureViewDimension::D2, + sample_type: wgpu::TextureSampleType::Uint, + }, + count: None, + }, + wgpu::BindGroupLayoutEntry { + binding: 1, + visibility: wgpu::ShaderStages::FRAGMENT, + ty: wgpu::BindingType::Texture { + multisampled: false, + view_dimension: wgpu::TextureViewDimension::D1, + sample_type: wgpu::TextureSampleType::Float { filterable: false }, + }, + count: None, + }, + ], + label: None, + }); + + let palette_bind_group = device.create_bind_group(&wgpu::BindGroupDescriptor { + layout: &palette_bind_group_layout, + entries: &[ + wgpu::BindGroupEntry { + binding: 0, + resource: wgpu::BindingResource::TextureView(&framebuffer_texture_view), + }, + wgpu::BindGroupEntry { + binding: 1, + resource: wgpu::BindingResource::TextureView(&palette_texture_view), + }, + ], + label: None, + }); + + let crt_bind_group_layout = + device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor { + entries: &[ + wgpu::BindGroupLayoutEntry { + binding: 0, + visibility: wgpu::ShaderStages::FRAGMENT, + ty: wgpu::BindingType::Texture { + multisampled: false, + view_dimension: wgpu::TextureViewDimension::D2, + sample_type: wgpu::TextureSampleType::Float { filterable: false }, + }, + count: None, + }, + wgpu::BindGroupLayoutEntry { + binding: 1, + visibility: wgpu::ShaderStages::VERTEX_FRAGMENT, + ty: wgpu::BindingType::Buffer { + ty: wgpu::BufferBindingType::Uniform, + has_dynamic_offset: false, + min_binding_size: None, + }, + count: None, + }, + ], + label: None, + }); + + let crt_bind_group = device.create_bind_group(&wgpu::BindGroupDescriptor { + layout: &crt_bind_group_layout, + entries: &[ + wgpu::BindGroupEntry { + binding: 0, + resource: wgpu::BindingResource::TextureView(&screen_texture_view), + }, + wgpu::BindGroupEntry { + binding: 1, + resource: uniform_buffer.as_entire_binding(), + }, + ], + label: None, + }); + + let palette_shader = device.create_shader_module(wgpu::ShaderModuleDescriptor { + label: None, + source: wgpu::ShaderSource::Wgsl(include_str!("palette.wgsl").into()), + }); + + let palette_pipeline_layout = + device.create_pipeline_layout(&wgpu::PipelineLayoutDescriptor { + label: None, + bind_group_layouts: &[&palette_bind_group_layout], + push_constant_ranges: &[], + }); + + let palette_pipeline = device.create_render_pipeline(&wgpu::RenderPipelineDescriptor { + label: None, + layout: Some(&palette_pipeline_layout), + vertex: wgpu::VertexState { + module: &palette_shader, + entry_point: "vs_main", + buffers: &[], + }, + fragment: Some(wgpu::FragmentState { + module: &palette_shader, + entry_point: "fs_main", + targets: &[Some(wgpu::ColorTargetState { + format: wgpu::TextureFormat::Rgba8UnormSrgb, + blend: None, + write_mask: wgpu::ColorWrites::ALL, + })], + }), + primitive: Default::default(), + depth_stencil: None, + multisample: Default::default(), + multiview: None, + }); + + let crt_shader = device.create_shader_module(wgpu::ShaderModuleDescriptor { + label: None, + source: wgpu::ShaderSource::Wgsl(include_str!("crt.wgsl").into()), + }); + + let render_pipeline_layout = + device.create_pipeline_layout(&wgpu::PipelineLayoutDescriptor { + label: None, + bind_group_layouts: &[&crt_bind_group_layout], + push_constant_ranges: &[], + }); + + let mut surface_config = wgpu::SurfaceConfiguration { + usage: wgpu::TextureUsages::RENDER_ATTACHMENT, + format: surface.get_supported_formats(&adapter)[0], + width: window.inner_size().width, + height: window.inner_size().height, + present_mode: wgpu::PresentMode::AutoNoVsync, + }; + + let render_pipeline = device.create_render_pipeline(&wgpu::RenderPipelineDescriptor { + label: None, + layout: Some(&render_pipeline_layout), + vertex: wgpu::VertexState { + module: &crt_shader, + entry_point: "vs_main", + buffers: &[], + }, + fragment: Some(wgpu::FragmentState { + module: &crt_shader, + entry_point: "fs_main", + targets: &[Some(wgpu::ColorTargetState { + format: surface_config.format, + blend: None, + write_mask: wgpu::ColorWrites::ALL, + })], + }), + primitive: Default::default(), + depth_stencil: None, + multisample: Default::default(), + multiview: None, + }); + + surface.configure(&device, &surface_config); + + event_loop.run(move |event, _, control_flow| { + let _ = (&window, &instance, &surface, &adapter, &device); + + match event { + Event::WindowEvent { event, .. } => match event { + WindowEvent::Resized(new_size) => { + surface_config.width = new_size.width; + surface_config.height = new_size.height; + surface.configure(&device, &surface_config); + uniforms.texture_scale = texture_scale_from_resolution(new_size); + queue.write_buffer(&uniform_buffer, 0, bytemuck::cast_slice(&[uniforms])); + } + WindowEvent::CloseRequested => *control_flow = ControlFlow::Exit, + WindowEvent::KeyboardInput { input, .. } => { + if input.state == winit::event::ElementState::Pressed { + match input.virtual_keycode { + Some(VirtualKeyCode::Escape) => *control_flow = ControlFlow::Exit, + Some(VirtualKeyCode::F) => { + window.set_fullscreen(if window.fullscreen().is_some() { + None + } else { + Some(Fullscreen::Borderless(None)) + }); + } + _ => (), + } + } + } + _ => (), + }, + Event::MainEventsCleared => { + if let ControlFlow::WaitUntil(t) = *control_flow { + if Instant::now() < t { + return; + } + } + let next_frame = update( + &mut GpuFramebuffer { + queue: &queue, + framebuffer: &framebuffer_texture, + palette: &palette_texture, + }, + 0, + false, + ); + *control_flow = ControlFlow::WaitUntil(next_frame); + + let output = surface.get_current_texture().unwrap(); + let view = output + .texture + .create_view(&wgpu::TextureViewDescriptor::default()); + let mut encoder = device + .create_command_encoder(&wgpu::CommandEncoderDescriptor { label: None }); + + { + let mut render_pass = + encoder.begin_render_pass(&wgpu::RenderPassDescriptor { + label: None, + color_attachments: &[Some(wgpu::RenderPassColorAttachment { + view: &screen_texture_view, + resolve_target: None, + ops: wgpu::Operations { + load: wgpu::LoadOp::Load, + store: true, + }, + })], + depth_stencil_attachment: None, + }); + + render_pass.set_pipeline(&palette_pipeline); + render_pass.set_bind_group(0, &palette_bind_group, &[]); + render_pass.draw(0..3, 0..1); + } + + { + let mut render_pass = + encoder.begin_render_pass(&wgpu::RenderPassDescriptor { + label: None, + color_attachments: &[Some(wgpu::RenderPassColorAttachment { + view: &view, + resolve_target: None, + ops: wgpu::Operations { + load: wgpu::LoadOp::Load, + store: true, + }, + })], + depth_stencil_attachment: None, + }); + + render_pass.set_pipeline(&render_pipeline); + render_pass.set_bind_group(0, &crt_bind_group, &[]); + render_pass.draw(0..3, 0..1); + } + + queue.submit(std::iter::once(encoder.finish())); + output.present(); + } + _ => (), + } + }); + } +} + +struct GpuFramebuffer<'a> { + framebuffer: &'a wgpu::Texture, + palette: &'a wgpu::Texture, + queue: &'a wgpu::Queue, +} + +impl<'a> Framebuffer for GpuFramebuffer<'a> { + fn update(&mut self, pixels: &[u8], palette: &[u8]) { + self.queue.write_texture( + wgpu::ImageCopyTexture { + texture: self.framebuffer, + mip_level: 0, + origin: wgpu::Origin3d::ZERO, + aspect: wgpu::TextureAspect::All, + }, + &bytemuck::cast_slice(pixels), + wgpu::ImageDataLayout { + offset: 0, + bytes_per_row: NonZeroU32::new(320), + rows_per_image: None, + }, + wgpu::Extent3d { + width: 320, + height: 240, + depth_or_array_layers: 1, + }, + ); + self.queue.write_texture( + wgpu::ImageCopyTexture { + texture: self.palette, + mip_level: 0, + origin: wgpu::Origin3d::ZERO, + aspect: wgpu::TextureAspect::All, + }, + &bytemuck::cast_slice(palette), + wgpu::ImageDataLayout { + offset: 0, + bytes_per_row: NonZeroU32::new(256 * 4), + rows_per_image: None, + }, + wgpu::Extent3d { + width: 256, + height: 1, + depth_or_array_layers: 1, + }, + ); + } +} + +fn texture_scale_from_resolution(res: PhysicalSize) -> [f32; 4] { + let scale = ((res.width as f32) / 160.0).min((res.height as f32) / 120.0); + [ + res.width as f32 / scale, + res.height as f32 / scale, + 2.0 / scale, + 0.0, + ] +} + +#[repr(C)] +#[derive(Debug, Copy, Clone, bytemuck::Pod, bytemuck::Zeroable)] +struct Uniforms { + texture_scale: [f32; 4], +} diff --git a/uw8-window/src/lib.rs b/uw8-window/src/lib.rs new file mode 100644 index 0000000..befc8d8 --- /dev/null +++ b/uw8-window/src/lib.rs @@ -0,0 +1,19 @@ +use std::time::Instant; + +mod cpu; +mod gpu; + +pub fn run Instant>(update: F) -> ! { + match gpu::Window::new() { + Ok(window) => window.run(Box::new(update)), + Err(err) => eprintln!( + "Failed to create gpu window: {}\nFalling back to cpu window", + err + ), + } + cpu::run(Box::new(update)); +} + +pub trait Framebuffer { + fn update(&mut self, pixels: &[u8], palette: &[u8]); +} diff --git a/uw8-window/src/main.rs b/uw8-window/src/main.rs new file mode 100644 index 0000000..b58f4f1 --- /dev/null +++ b/uw8-window/src/main.rs @@ -0,0 +1,40 @@ +use std::time::{Duration, Instant}; + +fn main() { + env_logger::Builder::from_env(env_logger::Env::default().default_filter_or("info")).init(); + + let mut framebuffer = vec![0u8; 320 * 240]; + let start_time = Instant::now(); + + let mut palette = vec![0u32; 256]; + for i in 0..256 { + let v = i & 15; + let r = ((i >> 2) & 12) * v; + let g = ((i >> 3) & 12) * v; + let b = ((i >> 4) & 12) * v; + palette[i as usize] = r + (g << 8) + (b << 16); + } + + let mut prev_frame = Instant::now(); + + uw8_window::run(move |gpu_framebuffer, _gamepads, _reset| { + draw_frame(&mut framebuffer, start_time.elapsed().as_secs_f32()); + gpu_framebuffer.update(&framebuffer, bytemuck::cast_slice(&palette)); + prev_frame += Duration::from_secs_f32(1.0 / 60.0); + prev_frame + }); +} + +fn draw_frame(framebuffer: &mut [u8], time: f32) { + for x in 0..320 { + let xr = x as f32 - 160.0; + for y in 0..240 { + let yr = y as f32 - 120.0; + let f = 8192.0 / (xr * xr + yr * yr); + let u = xr * f + 512.0 + time * 32.0; + let v = yr * f + time * 29.0; + let c = (u.floor() as i32 ^ v.floor() as i32) as u32; + framebuffer[x + y * 320] = c as u8; + } + } +} diff --git a/uw8-window/src/palette.wgsl b/uw8-window/src/palette.wgsl new file mode 100644 index 0000000..c4ec108 --- /dev/null +++ b/uw8-window/src/palette.wgsl @@ -0,0 +1,24 @@ +struct VertexOutput { + @builtin(position) clip_position: vec4, + @location(0) tex_coords: vec2, +} + +@vertex +fn vs_main(@builtin(vertex_index) vertex_index: u32) -> VertexOutput { + var out: VertexOutput; + let x = (1.0 - f32(vertex_index)) * 3.0; + let y = f32(vertex_index & 1u) * 3.0 - 1.0; + out.clip_position = vec4(x, y, 0.0, 1.0); + out.tex_coords = vec2((x + 1.0) * 160.0, (y + 1.0) * 120.0); + return out; +} + +@group(0) @binding(0) var framebuffer_texture: texture_2d; +@group(0) @binding(1) var palette_texture: texture_1d; + +@fragment +fn fs_main(in: VertexOutput) -> @location(0) vec4 { + let texel = vec2(floor(in.tex_coords)); + let index = textureLoad(framebuffer_texture, texel, 0).r; + return textureLoad(palette_texture, i32(index), 0); +} \ No newline at end of file