Added ui utilities

crates/render/src/ui/util/mod.rs

@@ -0,0 +1,18 @@
+mod spriteimage;
+mod spritetextarea;
+
+pub(super) use spriteimage::SpriteImage;
+pub(super) use spritetextarea::SpriteTextArea;
+
+use nalgebra::{Point2, Vector2};
+
+/// Represents a rectangular region inside a sprite.
+pub(crate) struct SpriteRect {
+	/// The position of the top-left corner of this rectangle, in fractional units.
+	/// (0.0 is left edge of sprite, 1.0 is right edge)
+	pub pos: Point2<f32>,
+
+	/// The width and height of this rectangle, in fractional units.
+	/// 1.0 will be as tall as the sprite, 0.5 will be half as tall
+	pub dim: Vector2<f32>,
+}

crates/render/src/ui/util/spriteimage.rs

@@ -0,0 +1,60 @@
+use galactica_content::SpriteHandle;
+use galactica_util::to_radians;
+use nalgebra::{Point2, Vector2};
+
+use super::SpriteRect;
+use crate::{vertexbuffer::types::UiInstance, PositionAnchor, RenderState};
+
+pub struct SpriteImage {
+	parent: SpriteHandle,
+	parent_position: Point2<f32>,
+	parent_size: f32,
+
+	inner: SpriteHandle,
+	mask: SpriteHandle,
+	rect: SpriteRect,
+}
+
+impl SpriteImage {
+	pub fn new(
+		parent: SpriteHandle,
+		parent_position: Point2<f32>,
+		parent_size: f32,
+		inner: SpriteHandle,
+		mask: SpriteHandle,
+		rect: SpriteRect,
+	) -> Self {
+		return Self {
+			parent,
+			parent_position,
+			parent_size,
+			inner,
+			mask,
+			rect,
+		};
+	}
+
+	/// Add this image to the gpu sprite buffer
+	pub fn push_to_buffer(&self, state: &mut RenderState) {
+		let h = self.parent_size;
+		let w = self.parent.aspect * h;
+
+		let zero = Point2::new(
+			self.parent_position.x - (w / 2.0),
+			self.parent_position.y + (h / 2.0),
+		);
+
+		let pos = zero + Vector2::new(self.rect.pos.x * w, -self.rect.pos.y * h);
+		let dim = Vector2::new(self.rect.dim.x * w, self.rect.dim.y * h);
+
+		state.push_ui_buffer(UiInstance {
+			anchor: PositionAnchor::CNw.to_int(),
+			position: pos.into(),
+			angle: to_radians(90.0),
+			size: dim.y,
+			color: [1.0, 1.0, 1.0, 1.0],
+			sprite_index: self.inner.get_index(),
+			mask_index: [1, self.mask.get_index()],
+		});
+	}
+}

crates/render/src/ui/util/spritetextarea.rs

@@ -0,0 +1,106 @@
+use galactica_content::SpriteHandle;
+use glyphon::{cosmic_text::Align, Attrs, Buffer, Color, Metrics, Shaping, TextArea, TextBounds};
+use nalgebra::{Point2, Vector2};
+
+use super::SpriteRect;
+use crate::RenderState;
+
+/// Represents a text area inside a sprite.
+pub(crate) struct SpriteTextArea {
+	/// Parent sprite
+	sprite: SpriteHandle,
+
+	/// Position of parent sprite's center, in logical pixels,
+	/// with 0, 0 at the center of the screen
+	sprite_position: Point2<f32>,
+
+	/// Height of parent sprite, in logical pixels
+	sprite_size: f32,
+
+	/// Bounds of text area
+	rect: SpriteRect,
+
+	/// Text buffer
+	buffer: Buffer,
+
+	/// Text color
+	color: Color,
+
+	/// Text alignment
+	align: Align,
+}
+
+impl SpriteTextArea {
+	pub fn new(
+		state: &mut RenderState,
+		sprite: SpriteHandle,
+		sprite_position: Point2<f32>,
+		sprite_size: f32,
+		rect: SpriteRect,
+		text_metrics: Metrics,
+		color: Color,
+		align: Align,
+	) -> Self {
+		let mut s = Self {
+			buffer: Buffer::new(&mut state.text_font_system, text_metrics),
+			sprite_size: f32::NAN,
+			sprite,
+			sprite_position,
+			rect,
+			align,
+			color,
+		};
+		s.set_size(state, sprite_size);
+		return s;
+	}
+
+	pub fn set_size(&mut self, state: &mut RenderState, sprite_size: f32) {
+		self.sprite_size = sprite_size;
+		self.buffer.set_size(
+			&mut state.text_font_system,
+			(self.rect.dim.x * self.sprite_size) * state.window.scale_factor() as f32,
+			(self.rect.dim.y * self.sprite_size * self.sprite.aspect)
+				* state.window.scale_factor() as f32,
+		);
+	}
+
+	pub fn set_text(&mut self, state: &mut RenderState, text: &str, attrs: Attrs) {
+		self.buffer
+			.set_text(&mut state.text_font_system, text, attrs, Shaping::Advanced);
+
+		for l in &mut self.buffer.lines {
+			l.set_align(Some(self.align));
+		}
+		self.buffer.shape_until_scroll(&mut state.text_font_system);
+	}
+
+	pub fn get_textarea(&self, state: &RenderState) -> TextArea {
+		let h = self.sprite_size;
+		let w = self.sprite.aspect * h;
+
+		// Glypon works with physical pixels, so we must convert
+		let fac = state.window.scale_factor() as f32;
+
+		// All the units below are in logical pixels
+		let zero = Vector2::new(
+			(state.window_size.width as f32 / (2.0 * fac)) - (w / 2.0) + self.sprite_position.x,
+			(state.window_size.height as f32 / (2.0 * fac)) - (h / 2.0) - self.sprite_position.y,
+		);
+		let corner_ne = zero + Vector2::new(self.rect.pos.x * w, self.rect.pos.y * h);
+		let corner_sw = corner_ne + Vector2::new(self.rect.dim.x * w, self.rect.dim.y * h);
+
+		TextArea {
+			buffer: &self.buffer,
+			top: corner_ne.y * fac,
+			left: corner_ne.x * fac,
+			scale: 1.0,
+			bounds: TextBounds {
+				top: (corner_ne.y * fac) as i32,
+				bottom: (corner_sw.y * fac) as i32,
+				left: (corner_ne.x * fac) as i32,
+				right: (corner_sw.x * fac) as i32,
+			},
+			default_color: self.color,
+		}
+	}
+}