490 lines
16 KiB
Rust
490 lines
16 KiB
Rust
use crate::context::RenderContext;
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use ruffle_render::backend::{RenderBackend, ShapeHandle};
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use ruffle_render::bitmap::{BitmapHandle, BitmapInfo, BitmapSize, BitmapSource};
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use ruffle_render::commands::CommandHandler;
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use ruffle_render::shape_utils::{
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cubic_curve_bounds, quadratic_curve_bounds, DistilledShape, DrawCommand, DrawPath, FillRule,
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};
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use std::cell::{Cell, RefCell};
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use swf::{FillStyle, LineStyle, Point, Rectangle, Twips};
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#[derive(Clone, Debug)]
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pub struct Drawing {
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render_handle: RefCell<Option<ShapeHandle>>,
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shape_bounds: Rectangle<Twips>,
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edge_bounds: Rectangle<Twips>,
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dirty: Cell<bool>,
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paths: Vec<DrawingPath>,
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bitmaps: Vec<BitmapInfo>,
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current_fill: Option<DrawingFill>,
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current_line: Option<DrawingLine>,
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pending_lines: Vec<DrawingLine>,
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cursor: Point<Twips>,
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fill_start: Point<Twips>,
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default_winding_rule: FillRule,
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}
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impl Default for Drawing {
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fn default() -> Self {
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Self::new()
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}
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}
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impl Drawing {
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pub fn new() -> Self {
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Self {
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render_handle: RefCell::new(None),
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shape_bounds: Default::default(),
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edge_bounds: Default::default(),
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dirty: Cell::new(false),
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paths: Vec::new(),
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bitmaps: Vec::new(),
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current_fill: None,
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current_line: None,
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pending_lines: Vec::new(),
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cursor: Point::ZERO,
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fill_start: Point::ZERO,
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default_winding_rule: FillRule::EvenOdd,
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}
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}
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pub fn from_swf_shape(shape: &swf::Shape) -> Self {
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let mut this = Self {
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render_handle: RefCell::new(None),
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shape_bounds: shape.shape_bounds.clone(),
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edge_bounds: shape.edge_bounds.clone(),
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dirty: Cell::new(true),
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paths: Vec::new(),
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bitmaps: Vec::new(),
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current_fill: None,
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current_line: None,
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pending_lines: Vec::new(),
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cursor: Point::ZERO,
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fill_start: Point::ZERO,
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default_winding_rule: if shape.flags.contains(swf::ShapeFlag::NON_ZERO_WINDING_RULE) {
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FillRule::NonZero
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} else {
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FillRule::EvenOdd
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},
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};
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let shape: DistilledShape = shape.into();
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for path in shape.paths {
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match path {
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DrawPath::Stroke {
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style,
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is_closed: _,
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commands,
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} => {
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this.set_line_style(Some(style.clone()));
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for command in commands {
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this.draw_command(command);
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}
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this.set_line_style(None);
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}
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DrawPath::Fill {
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style,
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commands,
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winding_rule,
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} => {
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this.new_fill(Some(style.clone()), Some(winding_rule));
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for command in commands {
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this.draw_command(command);
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}
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this.set_fill_style(None);
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}
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}
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}
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this
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}
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pub fn copy_from(&mut self, other: &Drawing) {
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*self = Drawing {
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render_handle: RefCell::new(None),
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dirty: Cell::new(true),
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shape_bounds: other.shape_bounds.clone(),
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edge_bounds: other.edge_bounds.clone(),
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paths: other.paths.clone(),
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bitmaps: other.bitmaps.clone(),
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current_fill: other.current_fill.clone(),
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current_line: other.current_line.clone(),
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pending_lines: other.pending_lines.clone(),
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cursor: other.cursor,
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fill_start: other.fill_start,
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default_winding_rule: other.default_winding_rule,
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}
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}
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/// Set fill style and reset fill rule to default.
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pub fn set_fill_style(&mut self, style: Option<FillStyle>) {
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self.new_fill(style, Some(self.default_winding_rule));
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}
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/// Set fill rule and keep the same fill style.
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pub fn set_fill_rule(&mut self, rule: Option<FillRule>) {
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let style = self.current_fill.as_ref().map(|fill| fill.style.clone());
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self.new_fill(style, rule);
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}
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/// Set fill style and rule.
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pub fn new_fill(&mut self, style: Option<FillStyle>, rule: Option<FillRule>) {
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self.close_path();
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if let Some(existing) = self.current_fill.take() {
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self.paths.push(DrawingPath::Fill(existing));
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}
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self.paths
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.extend(self.pending_lines.drain(..).map(DrawingPath::Line));
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if let Some(mut existing) = self.current_line.take() {
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existing.is_closed = self.cursor == self.fill_start;
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let style = existing.style.clone();
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self.paths.push(DrawingPath::Line(existing));
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self.current_line = Some(DrawingLine {
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style,
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commands: vec![DrawCommand::MoveTo(self.cursor)],
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is_closed: false,
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});
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}
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if let Some(style) = style {
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self.current_fill = Some(DrawingFill {
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style,
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rule: rule.unwrap_or(self.default_winding_rule),
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commands: vec![DrawCommand::MoveTo(self.cursor)],
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});
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}
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self.fill_start = self.cursor;
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self.dirty.set(true);
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}
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pub fn clear(&mut self) {
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self.current_fill = None;
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self.current_line = None;
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self.pending_lines.clear();
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self.paths.clear();
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self.bitmaps.clear();
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self.edge_bounds = Default::default();
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self.shape_bounds = Default::default();
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self.dirty.set(true);
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self.cursor = Point::ZERO;
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self.fill_start = Point::ZERO;
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}
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pub fn set_line_style(&mut self, style: Option<LineStyle>) {
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if let Some(mut existing) = self.current_line.take() {
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existing.is_closed = self.cursor == self.fill_start;
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if self.current_fill.is_some() {
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self.pending_lines.push(existing);
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} else {
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self.paths.push(DrawingPath::Line(existing));
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}
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}
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if let Some(style) = style {
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self.current_line = Some(DrawingLine {
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style,
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commands: vec![DrawCommand::MoveTo(self.cursor)],
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is_closed: false,
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});
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}
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self.dirty.set(true);
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}
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pub fn set_line_fill_style(&mut self, fill_style: FillStyle) {
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if let Some(style) = self.current_line.as_ref().map(|l| l.style.clone()) {
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self.set_line_style(Some(style.with_fill_style(fill_style)));
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}
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}
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pub fn draw_command(&mut self, command: DrawCommand) {
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let add_to_bounds = if let DrawCommand::MoveTo(move_to) = &command {
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// Close any pending fills before moving.
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self.close_path();
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self.fill_start = *move_to;
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false
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} else {
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true
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};
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// Add command to current fill.
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if let Some(fill) = &mut self.current_fill {
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fill.commands.push(command.clone());
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}
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// Add command to current line.
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let stroke_width = if let Some(line) = &mut self.current_line {
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line.commands.push(command.clone());
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line.style.width()
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} else {
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Twips::ZERO
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};
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// Expand bounds.
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if add_to_bounds {
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if self.fill_start == self.cursor {
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// If this is the initial command after a move, include the starting point.
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let command = DrawCommand::MoveTo(self.cursor);
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self.shape_bounds =
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stretch_bounds(&self.shape_bounds, &command, stroke_width, self.cursor);
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self.edge_bounds =
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stretch_bounds(&self.edge_bounds, &command, Twips::ZERO, self.cursor);
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}
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self.shape_bounds =
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stretch_bounds(&self.shape_bounds, &command, stroke_width, self.cursor);
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self.edge_bounds =
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stretch_bounds(&self.edge_bounds, &command, Twips::ZERO, self.cursor);
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}
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self.cursor = command.end_point();
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self.dirty.set(true);
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}
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pub fn add_bitmap(&mut self, bitmap: BitmapInfo) -> u16 {
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let id = self.bitmaps.len() as u16;
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self.bitmaps.push(bitmap);
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id
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}
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pub fn register_or_replace(&self, renderer: &mut dyn RenderBackend) -> ShapeHandle {
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if self.dirty.get() || self.render_handle.borrow().is_none() {
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self.dirty.set(false);
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let mut paths = Vec::with_capacity(self.paths.len());
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for path in &self.paths {
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match path {
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DrawingPath::Fill(fill) => {
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paths.push(DrawPath::Fill {
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style: &fill.style,
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commands: fill.commands.to_owned(),
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winding_rule: fill.rule,
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});
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}
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DrawingPath::Line(line) => {
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paths.push(DrawPath::Stroke {
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style: &line.style,
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commands: line.commands.to_owned(),
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is_closed: line.is_closed,
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});
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}
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}
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}
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if let Some(fill) = &self.current_fill {
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paths.push(DrawPath::Fill {
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style: &fill.style,
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commands: fill.commands.to_owned(),
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winding_rule: fill.rule,
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})
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}
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for line in &self.pending_lines {
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let mut commands = line.commands.to_owned();
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let is_closed = if self.current_fill.is_some() {
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commands.push(DrawCommand::LineTo(self.fill_start));
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true
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} else {
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self.cursor == self.fill_start
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};
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paths.push(DrawPath::Stroke {
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style: &line.style,
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commands,
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is_closed,
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})
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}
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if let Some(line) = &self.current_line {
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let mut commands = line.commands.to_owned();
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let is_closed = if self.current_fill.is_some() {
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commands.push(DrawCommand::LineTo(self.fill_start));
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true
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} else {
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self.cursor == self.fill_start
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};
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paths.push(DrawPath::Stroke {
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style: &line.style,
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commands,
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is_closed,
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})
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}
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let shape = DistilledShape {
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paths,
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shape_bounds: self.shape_bounds.clone(),
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edge_bounds: self.edge_bounds.clone(),
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id: 0,
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};
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let handle = renderer.register_shape(shape, self);
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self.render_handle.replace(Some(handle.clone()));
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handle
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} else {
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self.render_handle
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.borrow()
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.to_owned()
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.expect("Render handle cannot be empty here, we guarded on is_none")
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}
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}
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pub fn render(&self, context: &mut RenderContext) {
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let handle = self.register_or_replace(context.renderer);
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context
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.commands
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.render_shape(handle, context.transform_stack.transform());
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}
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pub fn self_bounds(&self) -> &Rectangle<Twips> {
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&self.shape_bounds
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}
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pub fn hit_test(
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&self,
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point: Point<Twips>,
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local_matrix: &ruffle_render::matrix::Matrix,
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) -> bool {
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use ruffle_render::shape_utils;
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for path in &self.paths {
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match path {
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DrawingPath::Fill(fill) => {
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if shape_utils::draw_command_fill_hit_test(&fill.commands, point) {
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return true;
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}
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}
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DrawingPath::Line(line) => {
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if shape_utils::draw_command_stroke_hit_test(
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&line.commands,
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line.style.width(),
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point,
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local_matrix,
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) {
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return true;
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}
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}
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}
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}
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// The pending fill will auto-close.
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if let Some(fill) = &self.current_fill {
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if shape_utils::draw_command_fill_hit_test(&fill.commands, point) {
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return true;
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}
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}
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for line in &self.pending_lines {
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if shape_utils::draw_command_stroke_hit_test(
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&line.commands,
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line.style.width(),
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point,
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local_matrix,
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) {
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return true;
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}
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}
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if let Some(line) = &self.current_line {
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if shape_utils::draw_command_stroke_hit_test(
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&line.commands,
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line.style.width(),
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point,
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local_matrix,
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) {
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return true;
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}
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// Stroke auto-closes if part of a fill; also check the closing line segment.
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if self.current_fill.is_some()
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&& self.cursor != self.fill_start
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&& shape_utils::draw_command_stroke_hit_test(
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&[
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DrawCommand::MoveTo(self.cursor),
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DrawCommand::LineTo(self.fill_start),
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],
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line.style.width(),
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point,
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local_matrix,
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)
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{
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return true;
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}
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}
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false
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}
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// Ensures that the path is closed for a pending fill.
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pub fn close_path(&mut self) {
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if let Some(fill) = &mut self.current_fill {
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if self.cursor != self.fill_start {
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fill.commands.push(DrawCommand::LineTo(self.fill_start));
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if let Some(line) = &mut self.current_line {
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line.commands.push(DrawCommand::LineTo(self.fill_start));
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}
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self.dirty.set(true);
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}
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}
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}
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}
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impl BitmapSource for Drawing {
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fn bitmap_size(&self, id: u16) -> Option<BitmapSize> {
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self.bitmaps.get(id as usize).map(|bm| BitmapSize {
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width: bm.width,
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height: bm.height,
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})
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}
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fn bitmap_handle(&self, id: u16, _backend: &mut dyn RenderBackend) -> Option<BitmapHandle> {
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self.bitmaps.get(id as usize).map(|bm| bm.handle.clone())
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}
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}
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#[derive(Debug, Clone)]
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struct DrawingFill {
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style: FillStyle,
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rule: FillRule,
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commands: Vec<DrawCommand>,
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}
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#[derive(Debug, Clone)]
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struct DrawingLine {
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style: LineStyle,
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commands: Vec<DrawCommand>,
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is_closed: bool,
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}
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#[derive(Debug, Clone)]
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enum DrawingPath {
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Fill(DrawingFill),
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Line(DrawingLine),
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}
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fn stretch_bounds(
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bounds: &Rectangle<Twips>,
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command: &DrawCommand,
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stroke_width: Twips,
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from: Point<Twips>,
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) -> Rectangle<Twips> {
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let bounds = bounds.clone();
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match *command {
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DrawCommand::MoveTo(point) | DrawCommand::LineTo(point) => {
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let radius = stroke_width / 2;
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bounds
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.encompass(Point::new(point.x - radius, point.y - radius))
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.encompass(Point::new(point.x + radius, point.y + radius))
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}
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DrawCommand::QuadraticCurveTo { control, anchor } => {
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bounds.union(&quadratic_curve_bounds(from, stroke_width, control, anchor))
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}
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DrawCommand::CubicCurveTo {
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control_a,
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control_b,
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anchor,
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} => bounds.union(&cubic_curve_bounds(
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from,
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stroke_width,
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control_a,
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control_b,
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anchor,
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)),
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}
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}
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