2020-05-21 13:49:59 +00:00
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use crate::backend::render::ShapeHandle;
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use crate::bounding_box::BoundingBox;
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use crate::context::{RenderContext, UpdateContext};
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use crate::shape_utils::{DistilledShape, DrawCommand, DrawPath};
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2020-05-21 14:45:22 +00:00
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use swf::{FillStyle, LineStyle, Twips};
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2020-05-21 13:49:59 +00:00
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#[derive(Clone, Debug)]
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pub struct Drawing {
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render_handle: Option<ShapeHandle>,
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shape_bounds: BoundingBox,
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edge_bounds: BoundingBox,
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dirty: bool,
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fills: Vec<(FillStyle, Vec<DrawCommand>)>,
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lines: Vec<(LineStyle, Vec<DrawCommand>)>,
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current_fill: Option<(FillStyle, Vec<DrawCommand>)>,
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current_line: Option<(LineStyle, Vec<DrawCommand>)>,
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2020-05-21 14:45:22 +00:00
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cursor: (Twips, Twips),
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2020-05-21 13:49:59 +00:00
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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: None,
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shape_bounds: BoundingBox::default(),
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edge_bounds: BoundingBox::default(),
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dirty: false,
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fills: Vec::new(),
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lines: Vec::new(),
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current_fill: None,
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current_line: None,
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2020-05-21 14:45:22 +00:00
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cursor: (Twips::zero(), Twips::zero()),
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2020-05-21 13:49:59 +00:00
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}
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}
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pub fn set_fill_style(&mut self, style: Option<FillStyle>) {
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// TODO: If current_fill is not closed, we should close it and also close current_line
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if let Some(existing) = self.current_fill.take() {
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self.fills.push(existing);
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}
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if let Some(style) = style {
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2020-05-21 14:45:22 +00:00
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self.current_fill = Some((
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style,
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vec![DrawCommand::MoveTo {
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x: self.cursor.0,
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y: self.cursor.1,
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}],
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));
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2020-05-21 13:49:59 +00:00
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}
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self.dirty = 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.fills.clear();
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self.lines.clear();
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self.edge_bounds = BoundingBox::default();
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self.shape_bounds = BoundingBox::default();
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self.dirty = true;
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2020-05-21 14:45:22 +00:00
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self.cursor = (Twips::zero(), Twips::zero());
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2020-05-21 13:49:59 +00:00
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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(existing) = self.current_line.take() {
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self.lines.push(existing);
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}
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if let Some(style) = style {
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2020-05-21 14:45:22 +00:00
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self.current_line = Some((
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style,
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vec![DrawCommand::MoveTo {
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x: self.cursor.0,
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y: self.cursor.1,
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}],
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));
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2020-05-21 13:49:59 +00:00
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}
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self.dirty = true;
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}
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pub fn draw_command(&mut self, command: DrawCommand) {
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let mut include_last = false;
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match command {
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DrawCommand::MoveTo { .. } => {}
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DrawCommand::LineTo { x, y } => {
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self.shape_bounds.encompass(x, y);
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self.edge_bounds.encompass(x, y);
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include_last = true;
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}
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DrawCommand::CurveTo { x1, y1, x2, y2 } => {
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self.shape_bounds.encompass(x1, y1);
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self.shape_bounds.encompass(x2, y2);
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self.edge_bounds.encompass(x1, y1);
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self.edge_bounds.encompass(x2, y2);
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include_last = true;
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}
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}
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2020-05-21 14:45:22 +00:00
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self.cursor = command.end_point();
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2020-05-21 13:49:59 +00:00
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if let Some((_, commands)) = &mut self.current_line {
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commands.push(command.clone());
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}
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if let Some((_, commands)) = &mut self.current_fill {
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commands.push(command);
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}
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if include_last {
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if let Some(command) = self
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.current_fill
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.as_ref()
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.and_then(|(_, commands)| commands.last().cloned())
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{
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match command {
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DrawCommand::MoveTo { x, y } => {
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self.shape_bounds.encompass(x, y);
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self.edge_bounds.encompass(x, y);
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}
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DrawCommand::LineTo { x, y } => {
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self.shape_bounds.encompass(x, y);
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self.edge_bounds.encompass(x, y);
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}
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DrawCommand::CurveTo { x1, y1, x2, y2 } => {
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self.shape_bounds.encompass(x1, y1);
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self.shape_bounds.encompass(x2, y2);
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self.edge_bounds.encompass(x1, y1);
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self.edge_bounds.encompass(x2, y2);
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}
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}
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}
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if let Some(command) = self
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.current_line
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.as_ref()
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.and_then(|(_, commands)| commands.last().cloned())
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{
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match command {
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DrawCommand::MoveTo { x, y } => {
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self.shape_bounds.encompass(x, y);
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self.edge_bounds.encompass(x, y);
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}
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DrawCommand::LineTo { x, y } => {
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self.shape_bounds.encompass(x, y);
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self.edge_bounds.encompass(x, y);
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}
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DrawCommand::CurveTo { x1, y1, x2, y2 } => {
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self.shape_bounds.encompass(x1, y1);
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self.shape_bounds.encompass(x2, y2);
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self.edge_bounds.encompass(x1, y1);
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self.edge_bounds.encompass(x2, y2);
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}
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}
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}
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}
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self.dirty = true;
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}
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pub fn run_frame(&mut self, context: &mut UpdateContext) {
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if self.dirty {
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self.dirty = false;
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let mut paths = Vec::new();
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for (style, commands) in &self.fills {
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paths.push(DrawPath::Fill {
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style,
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commands: commands.to_owned(),
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})
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}
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// TODO: If the current_fill is not closed, we should automatically close current_line
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if let Some((style, commands)) = &self.current_fill {
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paths.push(DrawPath::Fill {
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style,
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commands: commands.to_owned(),
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})
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}
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for (style, commands) in &self.lines {
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paths.push(DrawPath::Stroke {
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style,
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commands: commands.to_owned(),
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is_closed: false, // TODO: Determine this
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})
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}
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if let Some((style, commands)) = &self.current_line {
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paths.push(DrawPath::Stroke {
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style,
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commands: commands.to_owned(),
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is_closed: false, // TODO: Determine this
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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.shape_bounds.clone(),
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id: 0,
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};
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if let Some(handle) = self.render_handle {
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context.renderer.replace_shape(shape, handle);
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} else {
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self.render_handle = Some(context.renderer.register_shape(shape));
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}
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}
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}
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pub fn render(&self, context: &mut RenderContext) {
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if let Some(handle) = self.render_handle {
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context
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.renderer
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.render_shape(handle, context.transform_stack.transform());
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}
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}
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pub fn self_bounds(&self) -> BoundingBox {
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self.shape_bounds.clone()
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}
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}
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