GPU-accelerated UI toolkit (Vulkan)
git clone https://git.lucas.co/cce-ui.git
Initial commit: clear-ui GPU-accelerated UI framework
.gitignore | 1 +
Cargo.lock | 2368 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
Cargo.toml | 11 +
src/main.rs | 872 ++++++++++++++++++++
src/shader.wgsl | 20 +
5 files changed, 3272 insertions(+)
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index 0000000..6c06c0a
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new file mode 100644
index 0000000..c90eb43
--- /dev/null
+++ b/src/main.rs
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+use winit::event::{ElementState, MouseButton, WindowEvent};
+use winit::event_loop::{ActiveEventLoop, ControlFlow, EventLoop};
+use winit::window::{Window, WindowAttributes};
+use taffy::prelude::TaffyMaxContent;
+
+#[repr(C)]
+#[derive(Debug, Clone, Copy, bytemuck::Pod, bytemuck::Zeroable)]
+struct Vertex {
+ position: [f32; 2],
+ color: [f32; 4],
+}
+
+impl Vertex {
+ const ATTRIBS: [wgpu::VertexAttribute; 2] = wgpu::vertex_attr_array![
+ 0 => Float32x2,
+ 1 => Float32x4,
+ ];
+
+ fn desc() -> wgpu::VertexBufferLayout<'static> {
+ wgpu::VertexBufferLayout {
+ array_stride: std::mem::size_of::<Vertex>() as wgpu::BufferAddress,
+ step_mode: wgpu::VertexStepMode::Vertex,
+ attributes: &Self::ATTRIBS,
+ }
+ }
+}
+
+fn quad_vertices(
+ x: f32, y: f32, w: f32, h: f32,
+ surface_w: f32, surface_h: f32,
+ color: [f32; 4],
+) -> [Vertex; 6] {
+ let x0 = (x / surface_w) * 2.0 - 1.0;
+ let y0 = 1.0 - (y / surface_h) * 2.0;
+ let x1 = ((x + w) / surface_w) * 2.0 - 1.0;
+ let y1 = 1.0 - ((y + h) / surface_h) * 2.0;
+
+ [
+ Vertex { position: [x0, y0], color },
+ Vertex { position: [x1, y0], color },
+ Vertex { position: [x0, y1], color },
+ Vertex { position: [x1, y0], color },
+ Vertex { position: [x1, y1], color },
+ Vertex { position: [x0, y1], color },
+ ]
+}
+
+mod colors {
+ pub const HEADER_BG: [f32; 4] = [0.08, 0.08, 0.12, 1.0];
+ pub const HEADER_ACCENT: [f32; 4] = [0.60, 0.40, 0.20, 1.0];
+ pub const SIDEBAR_BG: [f32; 4] = [0.10, 0.10, 0.13, 1.0];
+ pub const CONTENT_BG: [f32; 4] = [0.13, 0.13, 0.16, 1.0];
+ pub const PANEL_IDLE: [f32; 4] = [0.14, 0.70, 0.38, 1.0];
+ pub const PANEL_DRAG: [f32; 4] = [0.24, 0.85, 0.50, 1.0];
+ pub const BUTTON_IDLE: [f32; 4] = [0.20, 0.40, 0.65, 1.0];
+ pub const BUTTON_HOVER: [f32; 4] = [0.30, 0.52, 0.78, 1.0];
+ pub const BUTTON_PRESS: [f32; 4] = [0.12, 0.28, 0.50, 1.0];
+ pub const STATUS_BG: [f32; 4] = [0.06, 0.06, 0.10, 1.0];
+ pub const STATUS_ACCENT: [f32; 4] = [0.20, 0.20, 0.25, 1.0];
+ pub const RESET_BTN_IDLE: [f32; 4] = [0.55, 0.20, 0.20, 1.0];
+ pub const RESET_BTN_HOVER: [f32; 4] = [0.70, 0.30, 0.30, 1.0];
+ pub const RESET_BTN_PRESS: [f32; 4] = [0.40, 0.12, 0.12, 1.0];
+}
+
+trait Widget {
+ fn rect(&self) -> (f32, f32, f32, f32);
+ fn set_rect(&mut self, x: f32, y: f32, w: f32, h: f32);
+
+ fn hit_test(&self, px: f32, py: f32) -> bool {
+ let (x, y, w, h) = self.rect();
+ px >= x && px <= x + w && py >= y && py <= y + h
+ }
+
+ fn cursor_moved(&mut self, _px: f32, _py: f32) -> bool { false }
+ fn mouse_input(&mut self, _button: MouseButton, _state: ElementState, _px: f32, _py: f32) -> bool { false }
+
+ fn vertices(&self, sw: f32, sh: f32) -> Vec<Vertex> {
+ let (x, y, w, h) = self.rect();
+ quad_vertices(x, y, w, h, sw, sh, self.color()).to_vec()
+ }
+
+ fn color(&self) -> [f32; 4];
+
+ fn is_dragging(&self) -> bool { false }
+ fn drag_update(&mut self, _px: f32, _py: f32) -> bool { false }
+ fn drag_begin(&mut self, _px: f32, _py: f32) {}
+ fn drag_end(&mut self) {}
+ fn take_click(&mut self) -> bool { false }
+ fn draggable(&self) -> bool { false }
+}
+
+struct Header {
+ x: f32, y: f32, w: f32, h: f32,
+}
+
+impl Header {
+ fn new() -> Self { Self { x: 0.0, y: 0.0, w: 0.0, h: 0.0 } }
+}
+
+impl Widget for Header {
+ fn rect(&self) -> (f32, f32, f32, f32) { (self.x, self.y, self.w, self.h) }
+ fn set_rect(&mut self, x: f32, y: f32, w: f32, h: f32) { self.x = x; self.y = y; self.w = w; self.h = h; }
+ fn color(&self) -> [f32; 4] { colors::HEADER_BG }
+
+ fn vertices(&self, sw: f32, sh: f32) -> Vec<Vertex> {
+ let (x, y, w, h) = self.rect();
+ let mut verts = Vec::new();
+ verts.extend(quad_vertices(x, y, w, h, sw, sh, colors::HEADER_BG));
+ verts.extend(quad_vertices(x, y + h - 2.0, w, 2.0, sw, sh, colors::HEADER_ACCENT));
+ verts
+ }
+}
+
+struct StatusBar {
+ x: f32, y: f32, w: f32, h: f32,
+}
+
+impl StatusBar {
+ fn new() -> Self { Self { x: 0.0, y: 0.0, w: 0.0, h: 0.0 } }
+}
+
+impl Widget for StatusBar {
+ fn rect(&self) -> (f32, f32, f32, f32) { (self.x, self.y, self.w, self.h) }
+ fn set_rect(&mut self, x: f32, y: f32, w: f32, h: f32) { self.x = x; self.y = y; self.w = w; self.h = h; }
+ fn color(&self) -> [f32; 4] { colors::STATUS_BG }
+
+ fn vertices(&self, sw: f32, sh: f32) -> Vec<Vertex> {
+ let (x, y, w, h) = self.rect();
+ let mut verts = Vec::new();
+ verts.extend(quad_vertices(x, y, w, h, sw, sh, colors::STATUS_BG));
+ verts.extend(quad_vertices(x, y, w, 2.0, sw, sh, colors::STATUS_ACCENT));
+ verts
+ }
+}
+
+struct Panel {
+ x: f32, y: f32, w: f32, h: f32,
+ dragging: bool,
+ drag_ox: f32, drag_oy: f32,
+ drag_start_x: f32, drag_start_y: f32,
+}
+
+impl Panel {
+ fn new(x: f32, y: f32, w: f32, h: f32) -> Self {
+ Self { x, y, w, h, dragging: false, drag_ox: 0.0, drag_oy: 0.0, drag_start_x: 0.0, drag_start_y: 0.0 }
+ }
+}
+
+impl Widget for Panel {
+ fn rect(&self) -> (f32, f32, f32, f32) { (self.x, self.y, self.w, self.h) }
+ fn set_rect(&mut self, x: f32, y: f32, w: f32, h: f32) { self.x = x; self.y = y; self.w = w; self.h = h; }
+ fn color(&self) -> [f32; 4] { if self.dragging { colors::PANEL_DRAG } else { colors::PANEL_IDLE } }
+
+ fn mouse_input(&mut self, button: MouseButton, state: ElementState, px: f32, py: f32) -> bool {
+ if button != MouseButton::Left { return false; }
+ match state {
+ ElementState::Pressed => {
+ if self.hit_test(px, py) {
+ self.drag_begin(px, py);
+ return true;
+ }
+ }
+ ElementState::Released => {
+ if self.dragging { self.drag_end(); return true; }
+ }
+ }
+ false
+ }
+
+ fn is_dragging(&self) -> bool { self.dragging }
+ fn draggable(&self) -> bool { true }
+
+ fn drag_update(&mut self, px: f32, py: f32) -> bool {
+ let nx = px - self.drag_ox;
+ let ny = py - self.drag_oy;
+ if (nx - self.x).abs() > 0.01 || (ny - self.y).abs() > 0.01 {
+ self.x = nx;
+ self.y = ny;
+ return true;
+ }
+ false
+ }
+
+ fn drag_begin(&mut self, px: f32, py: f32) {
+ self.dragging = true;
+ self.drag_ox = px - self.x;
+ self.drag_oy = py - self.y;
+ self.drag_start_x = self.x;
+ self.drag_start_y = self.y;
+ }
+
+ fn drag_end(&mut self) { self.dragging = false; }
+}
+
+enum ButtonKind {
+ Primary,
+ Reset,
+}
+
+struct Button {
+ x: f32, y: f32, w: f32, h: f32,
+ hovering: bool,
+ pressed: bool,
+ just_clicked: bool,
+ kind: ButtonKind,
+}
+
+impl Button {
+ fn new(x: f32, y: f32, w: f32, h: f32) -> Self {
+ Self { x, y, w, h, hovering: false, pressed: false, just_clicked: false, kind: ButtonKind::Primary }
+ }
+
+ fn new_reset(x: f32, y: f32, w: f32, h: f32) -> Self {
+ Self { x, y, w, h, hovering: false, pressed: false, just_clicked: false, kind: ButtonKind::Reset }
+ }
+}
+
+impl Widget for Button {
+ fn rect(&self) -> (f32, f32, f32, f32) { (self.x, self.y, self.w, self.h) }
+ fn set_rect(&mut self, x: f32, y: f32, w: f32, h: f32) { self.x = x; self.y = y; self.w = w; self.h = h; }
+ fn color(&self) -> [f32; 4] {
+ match self.kind {
+ ButtonKind::Primary => {
+ if self.pressed { colors::BUTTON_PRESS }
+ else if self.hovering { colors::BUTTON_HOVER }
+ else { colors::BUTTON_IDLE }
+ }
+ ButtonKind::Reset => {
+ if self.pressed { colors::RESET_BTN_PRESS }
+ else if self.hovering { colors::RESET_BTN_HOVER }
+ else { colors::RESET_BTN_IDLE }
+ }
+ }
+ }
+
+ fn cursor_moved(&mut self, px: f32, py: f32) -> bool {
+ let was = self.hovering;
+ self.hovering = self.hit_test(px, py);
+ was != self.hovering
+ }
+
+ fn mouse_input(&mut self, button: MouseButton, state: ElementState, px: f32, py: f32) -> bool {
+ if button != MouseButton::Left { return false; }
+ match state {
+ ElementState::Pressed => {
+ if self.hit_test(px, py) {
+ self.pressed = true;
+ return true;
+ }
+ }
+ ElementState::Released => {
+ if self.pressed && self.hit_test(px, py) {
+ self.just_clicked = true;
+ }
+ let was = self.pressed;
+ self.pressed = false;
+ return was;
+ }
+ }
+ false
+ }
+
+ fn take_click(&mut self) -> bool {
+ if self.just_clicked { self.just_clicked = false; true } else { false }
+ }
+}
+
+struct Sidebar {
+ x: f32, y: f32, w: f32, h: f32,
+}
+
+impl Sidebar {
+ fn new(w: f32) -> Self { Self { x: 0.0, y: 0.0, w, h: 0.0 } }
+}
+
+impl Widget for Sidebar {
+ fn rect(&self) -> (f32, f32, f32, f32) { (self.x, self.y, self.w, self.h) }
+ fn set_rect(&mut self, x: f32, y: f32, w: f32, h: f32) { self.x = x; self.y = y; self.w = w; self.h = h; }
+ fn color(&self) -> [f32; 4] { colors::SIDEBAR_BG }
+}
+
+struct ContentBg {
+ x: f32, y: f32, w: f32, h: f32,
+}
+
+impl ContentBg {
+ fn new() -> Self { Self { x: 0.0, y: 0.0, w: 0.0, h: 0.0 } }
+}
+
+impl Widget for ContentBg {
+ fn rect(&self) -> (f32, f32, f32, f32) { (self.x, self.y, self.w, self.h) }
+ fn set_rect(&mut self, x: f32, y: f32, w: f32, h: f32) { self.x = x; self.y = y; self.w = w; self.h = h; }
+ fn color(&self) -> [f32; 4] { colors::CONTENT_BG }
+}
+
+use taffy::geometry::{Rect, Size};
+use taffy::style::{Dimension, FlexDirection, LengthPercentage, Style};
+
+struct Layout {
+ tree: taffy::TaffyTree<()>,
+ root: taffy::NodeId,
+ widget_nodes: Vec<taffy::NodeId>,
+}
+
+impl Layout {
+ fn new(width: f32, height: f32) -> Self {
+ let mut tree = taffy::TaffyTree::new();
+
+ let header = tree.new_leaf(Style {
+ size: Size { width: Dimension::percent(1.0), height: Dimension::length(40.0) },
+ ..Default::default()
+ }).unwrap();
+
+ let sidebar = tree.new_leaf(Style {
+ size: Size { width: Dimension::length(60.0), height: Dimension::percent(1.0) },
+ ..Default::default()
+ }).unwrap();
+
+ let content_bg = tree.new_leaf(Style {
+ flex_grow: 1.0,
+ size: Size { width: Dimension::percent(1.0), height: Dimension::percent(1.0) },
+ ..Default::default()
+ }).unwrap();
+
+ let btn_a = tree.new_leaf(Style {
+ size: Size { width: Dimension::length(140.0), height: Dimension::length(40.0) },
+ ..Default::default()
+ }).unwrap();
+
+ let btn_b = tree.new_leaf(Style {
+ size: Size { width: Dimension::length(140.0), height: Dimension::length(40.0) },
+ ..Default::default()
+ }).unwrap();
+
+ let btn_c = tree.new_leaf(Style {
+ size: Size { width: Dimension::length(140.0), height: Dimension::length(40.0) },
+ ..Default::default()
+ }).unwrap();
+
+ let panel = tree.new_leaf(Style {
+ size: Size { width: Dimension::length(400.0), height: Dimension::length(250.0) },
+ ..Default::default()
+ }).unwrap();
+
+ let click_me = tree.new_leaf(Style {
+ size: Size { width: Dimension::length(140.0), height: Dimension::length(40.0) },
+ ..Default::default()
+ }).unwrap();
+
+ let reset = tree.new_leaf(Style {
+ size: Size { width: Dimension::length(140.0), height: Dimension::length(40.0) },
+ ..Default::default()
+ }).unwrap();
+
+ let status_bar = tree.new_leaf(Style {
+ size: Size { width: Dimension::percent(1.0), height: Dimension::length(28.0) },
+ ..Default::default()
+ }).unwrap();
+
+ let btn_row_1 = tree.new_with_children(
+ Style {
+ display: taffy::style::Display::Flex,
+ flex_direction: FlexDirection::Row,
+ gap: Size { width: LengthPercentage::length(10.0), height: LengthPercentage::length(0.0) },
+ ..Default::default()
+ },
+ &[btn_a, btn_b, btn_c],
+ ).unwrap();
+
+ let btn_row_2 = tree.new_with_children(
+ Style {
+ display: taffy::style::Display::Flex,
+ flex_direction: FlexDirection::Row,
+ gap: Size { width: LengthPercentage::length(10.0), height: LengthPercentage::length(0.0) },
+ ..Default::default()
+ },
+ &[click_me, reset],
+ ).unwrap();
+
+ let _content = tree.new_with_children(
+ Style {
+ display: taffy::style::Display::Flex,
+ flex_direction: FlexDirection::Column,
+ flex_grow: 1.0,
+ padding: Rect {
+ top: LengthPercentage::length(20.0),
+ left: LengthPercentage::length(20.0),
+ bottom: LengthPercentage::length(0.0),
+ right: LengthPercentage::length(0.0),
+ },
+ gap: Size { width: LengthPercentage::length(0.0), height: LengthPercentage::length(12.0) },
+ ..Default::default()
+ },
+ &[btn_row_1, panel, btn_row_2],
+ ).unwrap();
+
+ let body = tree.new_with_children(
+ Style {
+ display: taffy::style::Display::Flex,
+ flex_direction: FlexDirection::Row,
+ flex_grow: 1.0,
+ size: Size { width: Dimension::percent(1.0), height: Dimension::auto() },
+ ..Default::default()
+ },
+ &[sidebar, content_bg],
+ ).unwrap();
+
+ let root = tree.new_with_children(
+ Style {
+ display: taffy::style::Display::Flex,
+ flex_direction: FlexDirection::Column,
+ size: Size { width: Dimension::length(width), height: Dimension::length(height) },
+ ..Default::default()
+ },
+ &[header, body, status_bar],
+ ).unwrap();
+
+ let widget_nodes = vec![
+ header,
+ sidebar,
+ content_bg,
+ btn_a,
+ btn_b,
+ btn_c,
+ panel,
+ click_me,
+ reset,
+ status_bar,
+ ];
+
+ let mut layout = Self { tree, root, widget_nodes };
+ layout.compute(width, height);
+ layout
+ }
+
+ fn compute(&mut self, width: f32, height: f32) {
+ self.tree.set_style(self.root, Style {
+ size: Size { width: Dimension::length(width), height: Dimension::length(height) },
+ ..Default::default()
+ }).unwrap();
+
+ self.tree.compute_layout(self.root, Size::MAX_CONTENT).unwrap();
+ }
+
+ fn widget_rect(&self, node_id: taffy::NodeId) -> (f32, f32, f32, f32) {
+ let layout = self.tree.layout(node_id).unwrap();
+ let x = layout.location.x;
+ let y = layout.location.y;
+ let w = layout.size.width;
+ let h = layout.size.height;
+ (x, y, w, h)
+ }
+
+ fn resize(&mut self, width: f32, height: f32) {
+ self.compute(width, height);
+ }
+}
+
+struct State {
+ window: Arc<Window>,
+ surface: wgpu::Surface<'static>,
+ device: wgpu::Device,
+ queue: wgpu::Queue,
+ config: wgpu::SurfaceConfiguration,
+ render_pipeline: wgpu::RenderPipeline,
+ vertex_buffer: wgpu::Buffer,
+ vertex_count: u32,
+
+ widgets: Vec<Box<dyn Widget>>,
+ layout: Layout,
+
+ drag_widget: Option<usize>,
+ click_count: u32,
+
+ cursor_x: f32,
+ cursor_y: f32,
+
+ width: u32,
+ height: u32,
+}
+
+impl State {
+ async fn new(window: Arc<Window>) -> Self {
+ let size = window.inner_size();
+ let sw = size.width as f32;
+ let sh = size.height as f32;
+
+ let instance = wgpu::Instance::new(&wgpu::InstanceDescriptor {
+ backends: wgpu::Backends::VULKAN,
+ ..Default::default()
+ });
+
+ let surface = instance
+ .create_surface(window.clone())
+ .expect("Failed to create surface");
+
+ let adapter = instance
+ .request_adapter(&wgpu::RequestAdapterOptions {
+ power_preference: wgpu::PowerPreference::HighPerformance,
+ compatible_surface: Some(&surface),
+ force_fallback_adapter: false,
+ })
+ .await
+ .expect("Failed to find adapter");
+
+ let (device, queue) = adapter
+ .request_device(
+ &wgpu::DeviceDescriptor {
+ label: Some("GPU Device"),
+ required_features: wgpu::Features::empty(),
+ required_limits: wgpu::Limits::downlevel_webgl2_defaults()
+ .using_resolution(adapter.limits()),
+ memory_hints: wgpu::MemoryHints::MemoryUsage,
+ },
+ None,
+ )
+ .await
+ .expect("Failed to create device");
+
+ let config = surface
+ .get_default_config(&adapter, size.width.max(1), size.height.max(1))
+ .expect("Failed to get surface config");
+ surface.configure(&device, &config);
+
+ let shader = device.create_shader_module(wgpu::ShaderModuleDescriptor {
+ label: Some("Shader"),
+ source: wgpu::ShaderSource::Wgsl(include_str!("shader.wgsl").into()),
+ });
+
+ let pipeline_layout = device.create_pipeline_layout(&wgpu::PipelineLayoutDescriptor {
+ label: Some("Pipeline Layout"),
+ bind_group_layouts: &[],
+ push_constant_ranges: &[],
+ });
+
+ let render_pipeline = device.create_render_pipeline(&wgpu::RenderPipelineDescriptor {
+ label: Some("Render Pipeline"),
+ layout: Some(&pipeline_layout),
+ vertex: wgpu::VertexState {
+ module: &shader,
+ entry_point: Some("vs_main"),
+ buffers: &[Vertex::desc()],
+ compilation_options: Default::default(),
+ },
+ fragment: Some(wgpu::FragmentState {
+ module: &shader,
+ entry_point: Some("fs_main"),
+ targets: &[Some(wgpu::ColorTargetState {
+ format: config.format,
+ blend: Some(wgpu::BlendState::ALPHA_BLENDING),
+ write_mask: wgpu::ColorWrites::ALL,
+ })],
+ compilation_options: Default::default(),
+ }),
+ primitive: wgpu::PrimitiveState {
+ topology: wgpu::PrimitiveTopology::TriangleList,
+ strip_index_format: None,
+ front_face: wgpu::FrontFace::Ccw,
+ cull_mode: None,
+ polygon_mode: wgpu::PolygonMode::Fill,
+ unclipped_depth: false,
+ conservative: false,
+ },
+ depth_stencil: None,
+ multisample: wgpu::MultisampleState {
+ count: 1,
+ mask: !0,
+ alpha_to_coverage_enabled: false,
+ },
+ multiview: None,
+ cache: None,
+ });
+
+ let layout = Layout::new(sw, sh);
+
+ let widgets: Vec<Box<dyn Widget>> = vec![
+ Box::new(Header::new()), // 0
+ Box::new(Sidebar::new(60.0)), // 1
+ Box::new(ContentBg::new()), // 2
+ Box::new(Button::new(0.0, 0.0, 140.0, 40.0)), // 3
+ Box::new(Button::new(0.0, 0.0, 140.0, 40.0)), // 4
+ Box::new(Button::new(0.0, 0.0, 140.0, 40.0)), // 5
+ Box::new(Panel::new(0.0, 0.0, 400.0, 250.0)), // 6
+ Box::new(Button::new(0.0, 0.0, 140.0, 40.0)), // 7
+ Box::new(Button::new_reset(0.0, 0.0, 140.0, 40.0)), // 8
+ Box::new(StatusBar::new()), // 9
+ ];
+
+ let vertex_buffer = device.create_buffer(&wgpu::BufferDescriptor {
+ label: Some("Vertex Buffer"),
+ size: 1,
+ usage: wgpu::BufferUsages::VERTEX | wgpu::BufferUsages::COPY_DST,
+ mapped_at_creation: false,
+ });
+
+ let mut state = Self {
+ window,
+ surface,
+ device,
+ queue,
+ config,
+ render_pipeline,
+ vertex_buffer,
+ vertex_count: 0,
+ widgets,
+ layout,
+ drag_widget: None,
+ click_count: 0,
+ cursor_x: 0.0,
+ cursor_y: 0.0,
+ width: size.width,
+ height: size.height,
+ };
+
+ state.apply_layout();
+ state.upload_vertices();
+ state
+ }
+
+ fn apply_layout(&mut self) {
+ for (i, node_id) in self.layout.widget_nodes.iter().enumerate() {
+ if let Some(widget) = self.widgets.get_mut(i) {
+ if widget.is_dragging() {
+ continue;
+ }
+ let (x, y, w, h) = self.layout.widget_rect(*node_id);
+ widget.set_rect(x, y, w, h);
+ }
+ }
+ }
+
+ fn collect_vertices(&self) -> Vec<Vertex> {
+ let sw = self.width as f32;
+ let sh = self.height as f32;
+ let mut verts = Vec::new();
+ for w in &self.widgets {
+ verts.extend(w.vertices(sw, sh));
+ }
+ verts
+ }
+
+ fn upload_vertices(&mut self) {
+ let verts = self.collect_vertices();
+ self.vertex_count = verts.len() as u32;
+ let data = bytemuck::cast_slice(&verts);
+ let needed = data.len() as wgpu::BufferAddress;
+ if needed > self.vertex_buffer.size() {
+ self.vertex_buffer = self.device.create_buffer(&wgpu::BufferDescriptor {
+ label: Some("Vertex Buffer"),
+ size: needed,
+ usage: wgpu::BufferUsages::VERTEX | wgpu::BufferUsages::COPY_DST,
+ mapped_at_creation: false,
+ });
+ }
+ self.queue.write_buffer(&self.vertex_buffer, 0, data);
+ }
+
+ fn resize(&mut self, new_size: winit::dpi::PhysicalSize<u32>) {
+ if new_size.width > 0 && new_size.height > 0 {
+ self.width = new_size.width;
+ self.height = new_size.height;
+ self.config.width = new_size.width;
+ self.config.height = new_size.height;
+ self.surface.configure(&self.device, &self.config);
+ self.layout.resize(new_size.width as f32, new_size.height as f32);
+ self.apply_layout();
+ self.upload_vertices();
+ }
+ }
+
+ fn handle_event(&mut self, event: &WindowEvent) -> bool {
+ match event {
+ WindowEvent::CursorMoved { position, .. } => {
+ self.cursor_x = position.x as f32;
+ self.cursor_y = position.y as f32;
+ let mut changed = false;
+
+ if let Some(idx) = self.drag_widget {
+ if self.widgets[idx].drag_update(self.cursor_x, self.cursor_y) {
+ changed = true;
+ }
+ }
+
+ if self.drag_widget.is_none() {
+ for w in &mut self.widgets {
+ if w.cursor_moved(self.cursor_x, self.cursor_y) {
+ changed = true;
+ }
+ }
+ }
+ changed
+ }
+ WindowEvent::MouseInput { state: btn_state, button, .. } => {
+ if *button != MouseButton::Left { return false; }
+ let mut changed = false;
+
+ match btn_state {
+ ElementState::Pressed => {
+ for i in (0..self.widgets.len()).rev() {
+ if self.widgets[i].hit_test(self.cursor_x, self.cursor_y) {
+ if self.widgets[i].mouse_input(*button, *btn_state, self.cursor_x, self.cursor_y) {
+ changed = true;
+ }
+ if self.widgets[i].draggable() {
+ self.widgets[i].drag_begin(self.cursor_x, self.cursor_y);
+ self.drag_widget = Some(i);
+ }
+ break;
+ }
+ }
+ }
+ ElementState::Released => {
+ if let Some(idx) = self.drag_widget {
+ self.widgets[idx].drag_end();
+ self.drag_widget = None;
+ changed = true;
+ }
+ for w in &mut self.widgets {
+ if w.mouse_input(*button, *btn_state, self.cursor_x, self.cursor_y) {
+ changed = true;
+ }
+ }
+ for w in &mut self.widgets {
+ if w.take_click() {
+ self.click_count += 1;
+ }
+ }
+ }
+ }
+ changed
+ }
+ _ => false,
+ }
+ }
+
+ fn render(&mut self) {
+ let output = match self.surface.get_current_texture() {
+ Ok(t) => t,
+ Err(wgpu::SurfaceError::Lost | wgpu::SurfaceError::Outdated) => {
+ self.surface.configure(&self.device, &self.config);
+ return;
+ }
+ Err(wgpu::SurfaceError::Timeout) => return,
+ Err(e) => {
+ eprintln!("Surface error: {e:?}");
+ return;
+ }
+ };
+
+ let view = output.texture.create_view(&wgpu::TextureViewDescriptor::default());
+
+ let mut encoder = self.device.create_command_encoder(&wgpu::CommandEncoderDescriptor {
+ label: Some("Encoder"),
+ });
+
+ {
+ let mut pass = encoder.begin_render_pass(&wgpu::RenderPassDescriptor {
+ label: Some("Render Pass"),
+ color_attachments: &[Some(wgpu::RenderPassColorAttachment {
+ view: &view,
+ resolve_target: None,
+ ops: wgpu::Operations {
+ load: wgpu::LoadOp::Clear(wgpu::Color {
+ r: 0.06, g: 0.06, b: 0.08, a: 1.0,
+ }),
+ store: wgpu::StoreOp::Store,
+ },
+ })],
+ depth_stencil_attachment: None,
+ timestamp_writes: None,
+ occlusion_query_set: None,
+ });
+
+ pass.set_pipeline(&self.render_pipeline);
+ pass.set_vertex_buffer(0, self.vertex_buffer.slice(..));
+ pass.draw(0..self.vertex_count, 0..1);
+ }
+
+ self.queue.submit(std::iter::once(encoder.finish()));
+ self.window.pre_present_notify();
+ output.present();
+ }
+}
+
+struct App {
+ state: Option<State>,
+}
+
+impl App {
+ fn new() -> Self { Self { state: None } }
+}
+
+impl ApplicationHandler for App {
+ fn resumed(&mut self, event_loop: &ActiveEventLoop) {
+ if self.state.is_some() { return; }
+
+ let window = Arc::new(
+ event_loop
+ .create_window(
+ WindowAttributes::default()
+ .with_title("UI Framework - Test Window")
+ .with_inner_size(winit::dpi::LogicalSize::new(1024, 768)),
+ )
+ .unwrap(),
+ );
+
+ let state = pollster::block_on(State::new(window));
+ self.state = Some(state);
+ self.state.as_ref().unwrap().window.request_redraw();
+ }
+
+ fn window_event(
+ &mut self,
+ event_loop: &ActiveEventLoop,
+ _window_id: winit::window::WindowId,
+ event: WindowEvent,
+ ) {
+ let needs_redraw = match event {
+ WindowEvent::CloseRequested => {
+ event_loop.exit();
+ true
+ }
+ WindowEvent::Resized(size) => {
+ if let Some(state) = &mut self.state {
+ state.resize(size);
+ }
+ true
+ }
+ WindowEvent::RedrawRequested => {
+ if let Some(state) = &mut self.state {
+ state.render();
+ state.window.request_redraw();
+ }
+ true
+ }
+ _ => {
+ if let Some(state) = &mut self.state {
+ let prev = state.click_count;
+ let changed = state.handle_event(&event);
+ if changed {
+ state.upload_vertices();
+ }
+ if state.click_count != prev {
+ let clicks = state.click_count;
+ state.window.set_title(&format!(
+ "UI Framework - Test Window | clicks: {}", clicks
+ ));
+ }
+ changed
+ } else {
+ false
+ }
+ }
+ };
+ if needs_redraw {
+ if let Some(state) = &mut self.state {
+ state.window.request_redraw();
+ }
+ }
+ }
+}
+
+fn main() {
+ let event_loop = EventLoop::new().unwrap();
+ event_loop.set_control_flow(ControlFlow::Poll);
+
+ let mut app = App::new();
+ event_loop.run_app(&mut app).unwrap();
+}
diff --git a/src/shader.wgsl b/src/shader.wgsl
new file mode 100644
index 0000000..8493b48
--- /dev/null
+++ b/src/shader.wgsl
@@ -0,0 +1,20 @@
+struct VertexOutput {
+ @builtin(position) clip_position: vec4f,
+ @location(0) color: vec4f,
+}
+
+@vertex
+fn vs_main(
+ @location(0) position: vec2f,
+ @location(1) color: vec4f,
+) -> VertexOutput {
+ var out: VertexOutput;
+ out.clip_position = vec4f(position, 0.0, 1.0);
+ out.color = color;
+ return out;
+}
+
+@fragment
+fn fs_main(in: VertexOutput) -> @location(0) vec4f {
+ return in.color;
+}