add <image> widget

wgui/src/parser/widget_image.rs

@@ -0,0 +1,78 @@
+use crate::{
+	assets::AssetPath,
+	layout::WidgetID,
+	parser::{
+		parse_children, parse_widget_universal, print_invalid_attrib,
+		style::{parse_color, parse_round, parse_style},
+		AttribPair, ParserContext, ParserFile,
+	},
+	renderer_vk::text::custom_glyph::{CustomGlyphContent, CustomGlyphData},
+	widget::image::{WidgetImage, WidgetImageParams},
+};
+
+pub fn parse_widget_image<'a>(
+	file: &ParserFile,
+	ctx: &mut ParserContext,
+	node: roxmltree::Node<'a, 'a>,
+	parent_id: WidgetID,
+	attribs: &[AttribPair],
+) -> anyhow::Result<WidgetID> {
+	let mut params = WidgetImageParams::default();
+	let style = parse_style(attribs);
+	let mut glyph = None;
+
+	for pair in attribs {
+		let (key, value) = (pair.attrib.as_ref(), pair.value.as_ref());
+		match key {
+			"src" | "src_ext" | "src_builtin" | "src_internal" => {
+				let asset_path = match key {
+					"src" => AssetPath::FileOrBuiltIn(value),
+					"src_ext" => AssetPath::File(value),
+					"src_builtin" => AssetPath::BuiltIn(value),
+					"src_internal" => AssetPath::WguiInternal(value),
+					_ => unreachable!(),
+				};
+
+				if !value.is_empty() {
+					glyph = match CustomGlyphContent::from_assets(&mut ctx.layout.state.globals, asset_path) {
+						Ok(glyph) => Some(glyph),
+						Err(e) => {
+							log::warn!("failed to load {value}: {e}");
+							None
+						}
+					}
+				}
+			}
+			"round" => {
+				parse_round(
+					value,
+					&mut params.round,
+					ctx.doc_params.globals.get().defaults.rounding_mult,
+				);
+			}
+			"border" => {
+				params.border = value.parse().unwrap_or_else(|_| {
+					print_invalid_attrib(key, value);
+					0.0
+				});
+			}
+			"border_color" => {
+				parse_color(value, &mut params.border_color);
+			}
+			_ => {}
+		}
+	}
+
+	if let Some(glyph) = glyph {
+		params.glyph_data = Some(CustomGlyphData::new(glyph));
+	} else {
+		log::warn!("No source for image node!");
+	}
+
+	let (widget, _) = ctx.layout.add_child(parent_id, WidgetImage::create(params), style)?;
+
+	parse_widget_universal(ctx, &widget, attribs);
+	parse_children(file, ctx, node, widget.id)?;
+
+	Ok(widget.id)
+}