add <image> widget

wgui/src/widget/image.rs

@@ -0,0 +1,113 @@
+use std::sync::atomic::{AtomicUsize, Ordering};
+
+use slotmap::Key;
+
+use crate::{
+	drawing::{self, ImagePrimitive, PrimitiveExtent},
+	event::CallbackDataCommon,
+	globals::Globals,
+	layout::WidgetID,
+	renderer_vk::text::custom_glyph::CustomGlyphData,
+	widget::{util::WLength, WidgetStateFlags},
+};
+
+use super::{WidgetObj, WidgetState};
+
+static AUTO_INCREMENT: AtomicUsize = AtomicUsize::new(0);
+
+#[derive(Debug, Default)]
+pub struct WidgetImageParams {
+	pub glyph_data: Option<CustomGlyphData>,
+
+	pub border: f32,
+	pub border_color: drawing::Color,
+
+	pub round: WLength,
+}
+
+#[derive(Debug, Default)]
+pub struct WidgetImage {
+	params: WidgetImageParams,
+	id: WidgetID,
+	content_key: usize,
+}
+
+impl WidgetImage {
+	pub fn create(params: WidgetImageParams) -> WidgetState {
+		WidgetState::new(
+			WidgetStateFlags::default(),
+			Box::new(Self {
+				params,
+				id: WidgetID::null(),
+				content_key: AUTO_INCREMENT.fetch_add(1, Ordering::Relaxed),
+			}),
+		)
+	}
+
+	pub fn set_content(&mut self, common: &mut CallbackDataCommon, content: Option<CustomGlyphData>) {
+		if self.params.glyph_data == content {
+			return;
+		}
+
+		self.params.glyph_data = content;
+		common.mark_widget_dirty(self.id);
+	}
+
+	pub fn get_content(&self) -> Option<CustomGlyphData> {
+		self.params.glyph_data.clone()
+	}
+}
+
+impl WidgetObj for WidgetImage {
+	fn draw(&mut self, state: &mut super::DrawState, _params: &super::DrawParams) {
+		let boundary = drawing::Boundary::construct_relative(state.transform_stack);
+
+		let Some(content) = self.params.glyph_data.clone() else {
+			return;
+		};
+
+		let round_units = match self.params.round {
+			WLength::Units(units) => units as u8,
+			WLength::Percent(percent) => (f32::min(boundary.size.x, boundary.size.y) * percent / 2.0) as u8,
+		};
+
+		state.primitives.push(drawing::RenderPrimitive::Image(
+			PrimitiveExtent {
+				boundary,
+				transform: state.transform_stack.get().transform,
+			},
+			ImagePrimitive {
+				content,
+				content_key: self.content_key,
+				border: self.params.border,
+				border_color: self.params.border_color,
+				round_units,
+			},
+		));
+	}
+
+	fn measure(
+		&mut self,
+		_globals: &Globals,
+		_known_dimensions: taffy::Size<Option<f32>>,
+		_available_space: taffy::Size<taffy::AvailableSpace>,
+	) -> taffy::Size<f32> {
+		taffy::Size::ZERO
+	}
+
+	fn get_id(&self) -> WidgetID {
+		self.id
+	}
+
+	fn set_id(&mut self, id: WidgetID) {
+		self.id = id;
+	}
+
+	fn get_type(&self) -> super::WidgetType {
+		super::WidgetType::Sprite
+	}
+
+	fn debug_print(&self) -> String {
+		String::default()
+	}
+}

wgui/src/widget/mod.rs

@@ -17,6 +17,7 @@ use crate::{
 };
 
 pub mod div;
+pub mod image;
 pub mod label;
 pub mod rectangle;
 pub mod sprite;

wgui/src/widget/sprite.rs

@@ -50,6 +50,10 @@ impl WidgetSprite {
 	}
 
 	pub fn set_content(&mut self, common: &mut CallbackDataCommon, content: Option<CustomGlyphData>) {
+		if self.params.glyph_data == content {
+			return;
+		}
+
 		self.params.glyph_data = content;
 		common.mark_widget_dirty(self.id);
 	}