Modularize `iced_wgpu`

1 files changed, 6 insertions, 353 deletions

diff --git a/wgpu/src/lib.rs b/wgpu/src/lib.rs
index d8f727cd..9a2a336f 100644
--- a/wgpu/src/lib.rs
+++ b/wgpu/src/lib.rs
@@ -1,354 +1,7 @@
-use iced_native::{
-    button, checkbox, column, image, radio, renderer::Debugger, row, slider,
-    text, Button, Checkbox, Color, Column, Image, Layout, Node, Point, Radio,
-    Rectangle, Row, Slider, Style, Text, Widget,
-};
+mod mouse_cursor;
+mod primitive;
+mod renderer;
 
-use raw_window_handle::HasRawWindowHandle;
-use wgpu::{
-    Adapter, CommandEncoderDescriptor, Device, DeviceDescriptor, Extensions,
-    Instance, Limits, PowerPreference, RequestAdapterOptions, Surface,
-    SwapChain, SwapChainDescriptor, TextureFormat, TextureUsage,
-};
-use wgpu_glyph::{GlyphBrush, GlyphBrushBuilder, GlyphCruncher, Section};
-
-use std::f32;
-use std::{cell::RefCell, rc::Rc};
-
-pub struct Renderer {
-    instance: Instance,
-    surface: Surface,
-    adapter: Adapter,
-    device: Device,
-    glyph_brush: Rc<RefCell<GlyphBrush<'static, ()>>>,
-}
-
-pub struct Target {
-    width: u16,
-    height: u16,
-    swap_chain: SwapChain,
-}
-
-impl Renderer {
-    pub fn new<W: HasRawWindowHandle>(window: &W) -> Self {
-        let instance = Instance::new();
-
-        let adapter = instance.request_adapter(&RequestAdapterOptions {
-            power_preference: PowerPreference::LowPower,
-        });
-
-        let mut device = adapter.request_device(&DeviceDescriptor {
-            extensions: Extensions {
-                anisotropic_filtering: false,
-            },
-            limits: Limits { max_bind_groups: 1 },
-        });
-
-        let surface = instance.create_surface(window.raw_window_handle());
-
-        let font: &[u8] =
-            include_bytes!("../../examples/tour/resources/Roboto-Regular.ttf");
-
-        let glyph_brush = GlyphBrushBuilder::using_font_bytes(font)
-            .build(&mut device, TextureFormat::Bgra8UnormSrgb);
-
-        Self {
-            instance,
-            surface,
-            adapter,
-            device,
-            glyph_brush: Rc::new(RefCell::new(glyph_brush)),
-        }
-    }
-
-    pub fn target(&self, width: u16, height: u16) -> Target {
-        Target {
-            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) {
-        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.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.device.get_queue().submit(&[encoder.finish()]);
-    }
-
-    fn draw_primitive(&mut self, primitive: &Primitive) {
-        match primitive {
-            Primitive::None => {}
-            Primitive::Group { primitives } => {
-                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()
-            }),
-        }
-    }
-}
-
-#[derive(Debug, Clone)]
-pub enum Primitive {
-    None,
-    Group {
-        primitives: Vec<Primitive>,
-    },
-    Text {
-        content: String,
-        bounds: Rectangle,
-        size: f32,
-    },
-}
-
-impl iced_native::Renderer for Renderer {
-    type Primitive = Primitive;
-}
-
-impl column::Renderer for Renderer {
-    fn draw<Message>(
-        &mut self,
-        column: &Column<'_, Message, Self>,
-        layout: Layout<'_>,
-        cursor_position: Point,
-    ) -> Self::Primitive {
-        Primitive::Group {
-            primitives: column
-                .children
-                .iter()
-                .zip(layout.children())
-                .map(|(child, layout)| {
-                    child.draw(self, layout, cursor_position)
-                })
-                .collect(),
-        }
-    }
-}
-
-impl row::Renderer for Renderer {
-    fn draw<Message>(
-        &mut self,
-        row: &Row<'_, Message, Self>,
-        layout: Layout<'_>,
-        cursor_position: Point,
-    ) -> Self::Primitive {
-        Primitive::Group {
-            primitives: row
-                .children
-                .iter()
-                .zip(layout.children())
-                .map(|(child, layout)| {
-                    child.draw(self, layout, cursor_position)
-                })
-                .collect(),
-        }
-    }
-}
-
-impl text::Renderer for Renderer {
-    fn node(&self, text: &Text) -> Node {
-        let glyph_brush = self.glyph_brush.clone();
-        let content = text.content.clone();
-
-        // TODO: Investigate why stretch tries to measure this MANY times
-        // with every ancestor's bounds.
-        // Bug? Using the library wrong? I should probably open an issue on
-        // the stretch repository.
-        // I noticed that the first measure is the one that matters in
-        // practice. Here, we use a RefCell to store the cached measurement.
-        let measure = RefCell::new(None);
-        let size = text.size.map(f32::from).unwrap_or(20.0);
-
-        let style = Style::default().width(text.width);
-
-        iced_native::Node::with_measure(style, move |bounds| {
-            let mut measure = measure.borrow_mut();
-
-            if measure.is_none() {
-                let bounds = (
-                    match bounds.width {
-                        iced_native::Number::Undefined => f32::INFINITY,
-                        iced_native::Number::Defined(w) => w,
-                    },
-                    match bounds.height {
-                        iced_native::Number::Undefined => f32::INFINITY,
-                        iced_native::Number::Defined(h) => h,
-                    },
-                );
-
-                let text = Section {
-                    text: &content,
-                    scale: wgpu_glyph::Scale { x: size, y: size },
-                    bounds,
-                    ..Default::default()
-                };
-
-                let (width, height) = if let Some(bounds) =
-                    glyph_brush.borrow_mut().glyph_bounds(&text)
-                {
-                    (bounds.width(), bounds.height())
-                } else {
-                    (0.0, 0.0)
-                };
-
-                let size = iced_native::Size { width, height };
-
-                // If the text has no width boundary we avoid caching as the
-                // layout engine may just be measuring text in a row.
-                if bounds.0 == f32::INFINITY {
-                    return size;
-                } else {
-                    *measure = Some(size);
-                }
-            }
-
-            measure.unwrap()
-        })
-    }
-
-    fn draw(&mut self, text: &Text, layout: Layout<'_>) -> Self::Primitive {
-        Primitive::Text {
-            content: text.content.clone(),
-            size: f32::from(text.size.unwrap_or(20)),
-            bounds: layout.bounds(),
-        }
-    }
-}
-
-impl checkbox::Renderer for Renderer {
-    fn node<Message>(&mut self, _checkbox: &Checkbox<Message>) -> Node {
-        Node::new(Style::default())
-    }
-
-    fn draw<Message>(
-        &mut self,
-        _checkbox: &Checkbox<Message>,
-        _layout: Layout<'_>,
-        _cursor_position: Point,
-    ) -> Self::Primitive {
-        Primitive::None
-    }
-}
-
-impl radio::Renderer for Renderer {
-    fn node<Message>(&mut self, _checkbox: &Radio<Message>) -> Node {
-        Node::new(Style::default())
-    }
-
-    fn draw<Message>(
-        &mut self,
-        _radio: &Radio<Message>,
-        _layout: Layout<'_>,
-        _cursor_position: Point,
-    ) -> Self::Primitive {
-        Primitive::None
-    }
-}
-
-impl slider::Renderer for Renderer {
-    fn node<Message>(&self, _slider: &Slider<Message>) -> Node {
-        Node::new(Style::default())
-    }
-
-    fn draw<Message>(
-        &mut self,
-        _slider: &Slider<Message>,
-        _layout: Layout<'_>,
-        _cursor_position: Point,
-    ) -> Self::Primitive {
-        Primitive::None
-    }
-}
-
-impl image::Renderer<&str> for Renderer {
-    fn node(&mut self, _image: &Image<&str>) -> Node {
-        Node::new(Style::default())
-    }
-
-    fn draw(
-        &mut self,
-        _checkbox: &Image<&str>,
-        _layout: Layout<'_>,
-    ) -> Self::Primitive {
-        Primitive::None
-    }
-}
-
-impl button::Renderer for Renderer {
-    fn node<Message>(&self, _button: &Button<Message>) -> Node {
-        Node::new(Style::default())
-    }
-
-    fn draw<Message>(
-        &mut self,
-        _button: &Button<Message>,
-        _layout: Layout<'_>,
-        _cursor_position: Point,
-    ) -> Self::Primitive {
-        Primitive::None
-    }
-}
-
-impl Debugger for Renderer {
-    fn explain<Message>(
-        &mut self,
-        widget: &dyn Widget<Message, Self>,
-        layout: Layout<'_>,
-        cursor_position: Point,
-        _color: Color,
-    ) -> Self::Primitive {
-        widget.draw(self, layout, cursor_position)
-    }
-}
+pub use mouse_cursor::MouseCursor;
+pub use primitive::Primitive;
+pub use renderer::{Renderer, Target};