From 5d698998e9452b236e271cc94d384487837fba02 Mon Sep 17 00:00:00 2001 From: Jon Hardie Date: Sat, 15 Jun 2019 16:08:46 +1200 Subject: [PATCH] [WIP] Initial support for rendering graphic symbols from swf files. --- Cargo.toml | 2 + examples/swf_basic/Cargo.toml | 28 ++ examples/swf_basic/src/main.rs | 136 ++++++ examples/swf_basic/swf/tiger-flat.swf | Bin 0 -> 25311 bytes examples/swf_basic/swf/tiger.swf | Bin 0 -> 18971 bytes flash/Cargo.toml | 21 + flash/src/lib.rs | 207 +++++++++ flash/src/shapes.rs | 616 ++++++++++++++++++++++++++ flash/src/timeline.rs | 32 ++ 9 files changed, 1042 insertions(+) create mode 100644 examples/swf_basic/Cargo.toml create mode 100644 examples/swf_basic/src/main.rs create mode 100644 examples/swf_basic/swf/tiger-flat.swf create mode 100644 examples/swf_basic/swf/tiger.swf create mode 100644 flash/Cargo.toml create mode 100644 flash/src/lib.rs create mode 100644 flash/src/shapes.rs create mode 100644 flash/src/timeline.rs diff --git a/Cargo.toml b/Cargo.toml index d477c5b9..eaa64cae 100644 --- a/Cargo.toml +++ b/Cargo.toml @@ -10,9 +10,11 @@ members = [ "examples/canvas_moire", "examples/canvas_text", "examples/lottie_basic", + "examples/swf_basic", "geometry", "gl", "gpu", + "flash", "lottie", "renderer", "simd", diff --git a/examples/swf_basic/Cargo.toml b/examples/swf_basic/Cargo.toml new file mode 100644 index 00000000..eb64fe17 --- /dev/null +++ b/examples/swf_basic/Cargo.toml @@ -0,0 +1,28 @@ +[package] +name = "swf_basic" +version = "0.1.0" +authors = ["Jon Hardie "] +edition = "2018" + +[dependencies] +gl = "0.6" +sdl2 = "0.32" +sdl2-sys = "0.32" + +swf-parser = "0.7.0" +swf-tree = "0.7.0" + +[dependencies.pathfinder_flash] +path = "../../flash" + +[dependencies.pathfinder_geometry] +path = "../../geometry" + +[dependencies.pathfinder_gl] +path = "../../gl" + +[dependencies.pathfinder_gpu] +path = "../../gpu" + +[dependencies.pathfinder_renderer] +path = "../../renderer" diff --git a/examples/swf_basic/src/main.rs b/examples/swf_basic/src/main.rs new file mode 100644 index 00000000..ea7f8b73 --- /dev/null +++ b/examples/swf_basic/src/main.rs @@ -0,0 +1,136 @@ +// pathfinder/examples/swf_basic/src/main.rs +// +// Copyright © 2019 The Pathfinder Project Developers. +// +// Licensed under the Apache License, Version 2.0 or the MIT license +// , at your +// option. This file may not be copied, modified, or distributed +// except according to those terms. + +use pathfinder_geometry::basic::vector::{Vector2F, Vector2I}; +use pathfinder_geometry::basic::rect::RectF; +use pathfinder_gl::{GLDevice, GLVersion}; +use pathfinder_gpu::resources::FilesystemResourceLoader; +use pathfinder_gpu::{ClearParams, Device}; +use pathfinder_renderer::concurrent::rayon::RayonExecutor; +use pathfinder_renderer::concurrent::scene_proxy::SceneProxy; +use pathfinder_renderer::gpu::renderer::{DestFramebuffer, Renderer}; +use pathfinder_renderer::options::{RenderOptions, RenderTransform}; +use sdl2::event::Event; +use sdl2::keyboard::Keycode; +use sdl2::video::GLProfile; +use pathfinder_renderer::scene::Scene; +use pathfinder_flash::{draw_paths_into_scene, process_swf_tags}; +use std::env; +use std::fs::read; +use pathfinder_geometry::basic::transform2d::Transform2DF; + +fn main() { + let swf_bytes; + if let Some(path) = env::args().skip(1).next() { + match read(path) { + Ok(bytes) => { + swf_bytes = bytes; + }, + Err(e) => panic!(e) + } + } else { + // NOTE(jon): This is a version of the ghostscript tiger graphic flattened to a single + // layer with no overlapping shapes. This is how artwork is 'natively' created in the Flash + // authoring tool when an artist just draws directly onto the canvas (without 'object' mode + // turned on, which is the default). + // Subsequent shapes with different fills will knock out existing fills where they overlap. + // A downside of this in current pathfinder is that cracks are visible between shape fills - + // especially obvious if you set the context clear color to #ff00ff or similar. + + // Common speculation as to why the swf format stores vector graphics in this way says that + // it is to save on file-size bytes, however in the case of our tiger, it results in a + // larger file than the layered version, since the overlapping shapes and strokes create + // a lot more geometry. I think a more likely explanation for the choice is that it was + // done to reduce overdraw in the software rasterizer running on late 90's era hardware? + // Indeed, this mode gives pathfinders' occlusion culling pass nothing to do! + let default_tiger = include_bytes!("../swf/tiger-flat.swf"); + + // NOTE(jon): This is a version of the same graphic cut and pasted into the Flash authoring + // tool from the SVG version loaded in Illustrator. When layered graphics are pasted + // into Flash, by default they retain their layering, expressed as groups. + // They are still presented as being on a single timeline layer. + // They will be drawn back to front in much the same way as the SVG version. + + //let default_tiger = include_bytes!("../tiger.swf"); + swf_bytes = Vec::from(&default_tiger[..]); + } + + let (_, movie): (_, swf_tree::Movie) = swf_parser::parsers::movie::parse_movie(&swf_bytes[..]).unwrap(); + + // Set up SDL2. + let sdl_context = sdl2::init().unwrap(); + let video = sdl_context.video().unwrap(); + + // Make sure we have at least a GL 3.0 context. Pathfinder requires this. + let gl_attributes = video.gl_attr(); + gl_attributes.set_context_profile(GLProfile::Core); + gl_attributes.set_context_version(3, 3); + + // process swf scene + // TODO(jon): Since swf is a streaming format, this really wants to be a lazy iterator over + // swf frames eventually. + let (library, stage) = process_swf_tags(&movie); + + // Open a window. + let window_size = Vector2I::new(stage.width(), stage.height()); + let window = video.window("Minimal example", window_size.x() as u32, window_size.y() as u32) + .opengl() + .allow_highdpi() + .build() + .unwrap(); + + let pixel_size = Vector2I::new( + window.drawable_size().0 as i32, + window.drawable_size().1 as i32 + ); + let device_pixel_ratio = pixel_size.x() as f32 / window_size.x() as f32; + + // Create the GL context, and make it current. + let gl_context = window.gl_create_context().unwrap(); + gl::load_with(|name| video.gl_get_proc_address(name) as *const _); + window.gl_make_current(&gl_context).unwrap(); + + // Create a Pathfinder renderer. + let mut renderer = Renderer::new(GLDevice::new(GLVersion::GL3, 0), + &FilesystemResourceLoader::locate(), + DestFramebuffer::full_window(pixel_size)); + // Clear to swf stage background color. + let mut scene = Scene::new(); + scene.set_view_box(RectF::new( + Vector2F::default(), + Vector2F::new( + stage.width() as f32 * device_pixel_ratio, + stage.height() as f32 * device_pixel_ratio) + )); + draw_paths_into_scene(&library, &mut scene); + + // Render the canvas to screen. + renderer.device.clear(&ClearParams { + color: Some(stage.background_color()), + ..ClearParams::default() + }); + let scene = SceneProxy::from_scene(scene, RayonExecutor); + let mut render_options = RenderOptions::default(); + let scale_transform = Transform2DF::from_scale( + Vector2F::new(device_pixel_ratio, device_pixel_ratio) + ); + render_options.transform = RenderTransform::Transform2D(scale_transform); + scene.build_and_render(&mut renderer, render_options); + + window.gl_swap_window(); + // Wait for a keypress. + let mut event_pump = sdl_context.event_pump().unwrap(); + loop { + match event_pump.wait_event() { + Event::Quit {..} | Event::KeyDown { keycode: Some(Keycode::Escape), .. } => return, + _ => {} + } + } +} diff --git a/examples/swf_basic/swf/tiger-flat.swf b/examples/swf_basic/swf/tiger-flat.swf new file mode 100644 index 0000000000000000000000000000000000000000..70127188f531f9f5f5ad0fa219e95111bfbc1e83 GIT binary patch literal 25311 zcmV+aKLEf(S5pswWdHzpoTRq}Sliv#Ef}0&4Ta(o+=_cB9^9>^SaG)!+^tw~x8Po+ zxI4vNOVC1r;>C)?^!1c2g` z004jh0uUMi@W#d55~2x}1$#Q!JHjA;N20XWuCC4yPEHRG4-OAr4ks5YPHtggVNNa{ zP97fizX*1im!qqRC%Yqzj#do(F9oOt%*@5c+119$5&X~C#MH^nRg{+Y-(@`=oc~kS z5yoL+?qq7gVdmt(>1pE3$<4vV`H#+D5JcL=!o=0dMcc{AUQF^I6j;{Y1ZE9ZcX6_` zfWiLCo7jV;wFJQIU{g06dvh?K5ceC-|CRY)v@D>1-(oym+`{Z!{Or8k+FU{q9xe#4 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zo7sLV72;z+d=W@%K!11t_Cyqd1;0Lomr9P-65SaH{Fe3q9zk-*EWfr5@H!tlQrNML z9>qp}{J|0#9Y7o%IOQe;=qOrh*M!4q#c_|cdYZU;FKF`gz83}HxVh85xrqMP4u1p3 GAu>ri%Vnql literal 0 HcmV?d00001 diff --git a/flash/Cargo.toml b/flash/Cargo.toml new file mode 100644 index 00000000..2dff909f --- /dev/null +++ b/flash/Cargo.toml @@ -0,0 +1,21 @@ +[package] +name = "pathfinder_flash" +version = "0.1.0" +authors = ["Jon Hardie "] +edition = "2018" + +[dependencies] +swf-parser = "0.7.0" +swf-tree = "0.7.0" + +[dependencies.pathfinder_geometry] +path = "../geometry" + +[dependencies.pathfinder_renderer] +path = "../renderer" + +[dependencies.pathfinder_gl] +path = "../gl" + +[dependencies.pathfinder_gpu] +path = "../gpu" diff --git a/flash/src/lib.rs b/flash/src/lib.rs new file mode 100644 index 00000000..fdc8b57e --- /dev/null +++ b/flash/src/lib.rs @@ -0,0 +1,207 @@ +// pathfinder/flash/src/lib.rs +// +// Copyright © 2019 The Pathfinder Project Developers. +// +// Licensed under the Apache License, Version 2.0 or the MIT license +// , at your +// option. This file may not be copied, modified, or distributed +// except according to those terms. + +use std::ops::Add; +use pathfinder_geometry::color::{ColorU, ColorF}; +use pathfinder_geometry::outline::{Outline, Contour}; +use pathfinder_geometry::basic::vector::Vector2F; +use pathfinder_geometry::stroke::{OutlineStrokeToFill, StrokeStyle}; +use pathfinder_renderer::scene::{PathObject, Scene}; + +use swf_tree; +use swf_tree::tags::SetBackgroundColor; +use swf_tree::{Tag, SRgb8, Movie}; + +use crate::shapes::{GraphicLayers, PaintOrLine}; + +mod shapes; + +type SymbolId = u16; + +// In swf, most values are specified in a fixed point format known as "twips" or twentieths of +// a pixel. We store twips in their integer form, as if we were to convert them to floating point +// at the beginning of the pipeline it's easy to start running into precision errors when we add +// coordinate deltas and then try and compare coords for equality. + +#[derive(Copy, Clone, Debug, PartialEq)] +struct Twips(i32); + +impl Twips { + // Divide twips by 20 to get the f32 value, just to be used once all processing + // of the swf coords is completed and we want to output. + fn as_f32(&self) -> f32 { + self.0 as f32 / 20.0 + } +} + +impl Add for Twips { + type Output = Twips; + fn add(self, rhs: Twips) -> Self { + Twips(self.0 + rhs.0) + } +} + +#[derive(Copy, Clone, Debug, PartialEq)] +struct Point2 { + x: T, + y: T +} + +impl Point2 { + fn as_f32(self: Point2) -> Point2 { + Point2 { + x: self.x.as_f32(), + y: self.y.as_f32(), + } + } +} + +impl Add for Point2 { + type Output = Self; + fn add(self, rhs: Self) -> Self { + Point2 { x: self.x + rhs.x, y: self.y + rhs.y } + } +} + +enum Symbol { + Graphic(GraphicLayers), + // Timeline, // TODO(jon) +} + +pub struct Stage { + // TODO(jon): Support some kind of lazy frames iterator. + // frames: Timeline, + background_color: SRgb8, + width: i32, + height: i32, +} + +impl Stage { + pub fn width(&self) -> i32 { + self.width + } + + pub fn height(&self) -> i32 { + self.height + } + + pub fn background_color(&self) -> ColorF { + ColorU { + r: self.background_color.r, + g: self.background_color.g, + b: self.background_color.b, + a: 255, + }.to_f32() + } +} + + +pub struct SymbolLibrary(Vec); + +impl SymbolLibrary { + fn add_symbol(&mut self, symbol: Symbol) { + self.0.push(symbol); + } + + fn symbols(&self) -> &Vec { + &self.0 + } +} + +pub fn process_swf_tags(movie: &Movie) -> (SymbolLibrary, Stage) { + let mut symbol_library = SymbolLibrary(Vec::new()); + let stage_width = Twips(movie.header.frame_size.x_max); + let stage_height = Twips(movie.header.frame_size.y_max); + // let num_frames = movie.header.frame_count; + + let mut stage = Stage { + // frames: Timeline(Vec::new()), // TODO(jon) + background_color: SRgb8 { + r: 255, + g: 255, + b: 255 + }, + width: stage_width.as_f32() as i32, + height: stage_height.as_f32() as i32, + }; + + for tag in &movie.tags { + match tag { + Tag::SetBackgroundColor(SetBackgroundColor { color }) => { + stage.background_color = *color; + }, + Tag::DefineShape(shape) => { + symbol_library.add_symbol(Symbol::Graphic(shapes::decode_shape(&shape))); + // We will assume that symbol ids just go up, and are 1 based. + let symbol_id: SymbolId = shape.id; + debug_assert!(symbol_id as usize == symbol_library.0.len()); + } + _ => () + } + } + (symbol_library, stage) +} + +#[allow(irrefutable_let_patterns)] +pub fn draw_paths_into_scene(library: &SymbolLibrary, scene: &mut Scene) { + for symbol in library.symbols() { + // NOTE: Right now symbols only contain graphics. + if let Symbol::Graphic(graphic) = symbol { + for style_layer in graphic.layers() { + debug_assert_ne!(style_layer.shapes().len(), 0); + let mut path = Outline::new(); + let paint_id = scene.push_paint(&style_layer.fill()); + + for shape in style_layer.shapes() { + let mut contour = Contour::new(); + let Point2 { x, y } = shape.outline.first().unwrap().from.as_f32(); + contour.push_endpoint(Vector2F::new(x, y)); + for segment in &shape.outline { + let Point2 { x, y } = segment.to.as_f32(); + match segment.ctrl { + Some(ctrl) => { + let Point2 { x: ctrl_x, y: ctrl_y } = ctrl.as_f32(); + contour.push_quadratic( + Vector2F::new(ctrl_x, ctrl_y), + Vector2F::new(x, y) + ); + } + None => { + contour.push_endpoint(Vector2F::new(x, y)); + }, + } + } + if shape.is_closed() { + // NOTE: I'm not sure if this really does anything in this context, + // since all our closed shapes already have coincident start and end points. + contour.close(); + } + path.push_contour(contour); + } + + if let PaintOrLine::Line(line) = style_layer.kind() { + let mut stroke_to_fill = OutlineStrokeToFill::new(&path, StrokeStyle { + line_width: line.width.as_f32(), + line_cap: line.cap, + line_join: line.join, + }); + stroke_to_fill.offset(); + path = stroke_to_fill.into_outline(); + } + + scene.push_path(PathObject::new( + path, + paint_id, + String::new() + )); + } + } + } +} diff --git a/flash/src/shapes.rs b/flash/src/shapes.rs new file mode 100644 index 00000000..cf724f50 --- /dev/null +++ b/flash/src/shapes.rs @@ -0,0 +1,616 @@ +use pathfinder_renderer::paint::Paint; +use pathfinder_geometry::stroke::{LineJoin, LineCap}; +use crate::{Twips, Point2}; +use std::mem; +use std::cmp::Ordering; +use swf_tree::{ + FillStyle, + StraightSRgba8, + LineStyle, + fill_styles, + JoinStyle, + CapStyle, + join_styles, + ShapeRecord, + shape_records, + Vector2D +}; +use pathfinder_geometry::color::ColorU; +use swf_tree::tags::DefineShape; + +#[derive(Clone, Copy, Debug)] +pub(crate) struct LineSegment { + pub(crate) from: Point2, + pub(crate) to: Point2, + pub(crate) ctrl: Option>, +} + +impl LineSegment { + fn reverse(&mut self) { + let tmp = self.from; + self.from = self.to; + self.to = tmp; + } +} + +#[derive(Copy, Clone, PartialEq, Debug)] +pub(crate) enum LineDirection { + Left, + Right, +} + +impl LineDirection { + fn reverse(&mut self) { + *self = match self { + LineDirection::Right => LineDirection::Left, + LineDirection::Left => LineDirection::Right + }; + } +} + +#[derive(Clone, Debug)] +pub(crate) struct Shape { + pub(crate) outline: Vec, // Could be Vec<(start, end)> + direction: LineDirection, + reversed: bool, +} + +impl Shape { + pub fn new_with_direction(direction: LineDirection) -> Shape { + Shape { + direction, + outline: Vec::new(), + reversed: false, + } + } + + fn prepend_shape(&mut self, shape: &mut Shape) { + shape.append_shape(&self); + mem::swap(&mut self.outline, &mut shape.outline); + } + + fn append_shape(&mut self, shape: &Shape) { + self.outline.extend_from_slice(&shape.outline); + } + + fn add_line_segment(&mut self, segment: LineSegment) { + self.outline.push(segment); + } + + #[inline] + fn len(&self) -> usize { + self.outline.len() + } + + #[inline] + fn first(&self) -> &LineSegment { + &self.outline.first().unwrap() + } + + #[inline] + fn last(&self) -> &LineSegment { + &self.outline.last().unwrap() + } + + #[inline] + fn comes_before(&self, other: &Shape) -> bool { + self.last().to == other.first().from + } + + #[inline] + fn comes_after(&self, other: &Shape) -> bool { + self.first().from == other.last().to + } + + #[inline] + pub(crate) fn is_closed(&self) -> bool { + self.len() > 1 && self.comes_after(self) + } + + fn reverse(&mut self) { + self.reversed = !self.reversed; + self.direction.reverse(); + for segment in &mut self.outline { + segment.reverse(); + } + self.outline.reverse(); + } +} + +pub(crate) struct SwfLineStyle { + color: Paint, + pub(crate) width: Twips, + pub(crate) join: LineJoin, + pub(crate) cap: LineCap, +} + +pub(crate) enum PaintOrLine { + Paint(Paint), + Line(SwfLineStyle), +} + +pub(crate) struct StyleLayer { + fill: PaintOrLine, + // TODO(jon): Maybe shapes are actually slices into a single buffer, then we don't + // need to realloc anything, we're just shuffling shapes around? + shapes: Vec, +} + +impl StyleLayer { + pub(crate) fn kind(&self) -> &PaintOrLine { + &self.fill + } + + fn is_fill(&self) -> bool { + match &self.fill { + PaintOrLine::Paint(_) => true, + PaintOrLine::Line(_) => false, + } + } + + pub(crate) fn fill(&self) -> Paint { + match &self.fill { + PaintOrLine::Paint(paint) => *paint, + PaintOrLine::Line(line) => line.color, + } + } + + fn push_new_shape(&mut self, direction: LineDirection) { + if let Some(prev_shape) = self.shapes.last_mut() { + // Check that the previous shape was actually used, otherwise reuse it. + if prev_shape.len() != 0 { + self.shapes.push(Shape::new_with_direction(direction)) + } else { + prev_shape.direction = direction; + } + } else { + self.shapes.push(Shape::new_with_direction(direction)) + } + } + + pub(crate) fn shapes(&self) -> &Vec { + &self.shapes + } + + fn shapes_mut(&mut self) -> &mut Vec { + &mut self.shapes + } + + fn current_shape_mut(&mut self) -> &mut Shape { + self.shapes.last_mut().unwrap() + } + + fn consolidate_edges(&mut self) { + // Reverse left fill shape fragments in place. + { + self.shapes + .iter_mut() + .filter(|frag| frag.direction == LineDirection::Left) + .for_each(|frag| frag.reverse()); + } + + // Sort shapes into [closed...open] + if self.is_fill() { + // I think sorting is only necessary when we want to have closed shapes, + // lines don't really need this? + self.shapes.sort_unstable_by(|a, b| { + match (a.is_closed(), b.is_closed()) { + (true, true) | (false, false) => Ordering::Equal, + (true, false) => Ordering::Less, + (false, true) => Ordering::Greater, + } + }); + } + + // A cursor at the index of the first unclosed shape, if any. + let first_open_index = self.shapes + .iter() + .position(|frag| !frag.is_closed()); + + if let Some(first_open_index) = first_open_index { + if self.shapes.len() - first_open_index >= 2 { + // TODO(jon): This might be sped up by doing it in a way that we don't have + // to allocate more vecs? + // Also, maybe avoid path reversal, and just flag the path as reversed and iterate it + // backwards. + let unmatched_pieces = find_matches(first_open_index, &mut self.shapes, false); + if let Some(mut unmatched_pieces) = unmatched_pieces { + if self.is_fill() { + // If they didn't match before, they're probably parts of inner shapes + // and should be reversed again so they have correct winding + let unclosed = find_matches(0, &mut unmatched_pieces, true); + // If it's a shape we should always be able to close it. + debug_assert!(unclosed.is_none()); + } + for dropped in &mut unmatched_pieces { + dropped.reverse(); + } + self.shapes.extend_from_slice(&unmatched_pieces); + } + // FIXME(jon): Sometimes we don't get the correct winding of internal closed shapes, + // need to figure out why this happens. + } + } + } +} + + +fn get_new_styles<'a>( + fills: &'a Vec, + lines: &'a Vec +) -> impl Iterator + 'a { + // This enforces the order that fills and line groupings are added in. + // Fills always come first. + fills.iter().filter_map(|fill_style| { + match fill_style { + FillStyle::Solid( + fill_styles::Solid { + color: StraightSRgba8 { + r, + g, + b, + a + } + } + ) => { + Some(PaintOrLine::Paint(Paint { + color: ColorU { + r: *r, + g: *g, + b: *b, + a: *a + } + })) + }, + _ => unimplemented!("Unimplemented fill style") + } + }).chain( + lines.iter().filter_map(|LineStyle { + width, + fill, + join, + start_cap, + end_cap: _, + /* + TODO(jon): Handle these cases? + pub no_h_scale: bool, + pub no_v_scale: bool, + pub no_close: bool, + pub pixel_hinting: bool, + */ + .. + }| { + if let FillStyle::Solid(fill_styles::Solid { + color: StraightSRgba8 { + r, + g, + b, + a + } + }) = fill { + // NOTE: PathFinder doesn't support different cap styles for start and end of + // strokes, so lets assume that they're always the same for the inputs we care about. + // Alternately, we split a line in two with a diff cap style for each. + // assert_eq!(start_cap, end_cap); + Some(PaintOrLine::Line(SwfLineStyle { + width: Twips(*width as i32), + color: Paint { color: ColorU { r: *r, g: *g, b: *b, a: *a } }, + join: match join { + JoinStyle::Bevel => LineJoin::Bevel, + JoinStyle::Round => LineJoin::Round, + JoinStyle::Miter(join_styles::Miter { limit }) => { + LineJoin::Miter(*limit as f32) + }, + }, + cap: match start_cap { + CapStyle::None => LineCap::Butt, + CapStyle::Square => LineCap::Square, + CapStyle::Round => LineCap::Round, + }, + })) + } else { + unimplemented!("unimplemented line fill style"); + } + }) + ) +} + +pub(crate) fn decode_shape(shape: &DefineShape) -> GraphicLayers { + let DefineShape { + shape, + // id, + // has_fill_winding, NOTE(jon): Could be important for some inputs? + // has_non_scaling_strokes, + // has_scaling_strokes, + .. + } = shape; + let mut graphic = GraphicLayers::new(); + let mut current_line_style = None; + let mut current_left_fill = None; + let mut current_right_fill = None; + let mut prev_pos = None; + + let mut some_fill_set = false; + let mut both_fills_set; + let mut both_fills_same = false; + let mut both_fills_set_and_same = false; + + // Create style groups for initially specified fills and lines. + for fills_or_line in get_new_styles(&shape.initial_styles.fill, &shape.initial_styles.line) { + match fills_or_line { + PaintOrLine::Paint(fill) => graphic.begin_fill_style(fill), + PaintOrLine::Line(line) => graphic.begin_line_style(line), + } + } + + for record in &shape.records { + match record { + ShapeRecord::StyleChange( + shape_records::StyleChange { + move_to, + new_styles, + line_style, + left_fill, + right_fill, + } + ) => { + // Start a whole new style grouping. + if let Some(new_style) = new_styles { + // Consolidate current style grouping and begin a new one. + graphic.end_style_group(); + graphic.begin_style_group(); + for fills_or_line in get_new_styles(&new_style.fill, &new_style.line) { + match fills_or_line { + PaintOrLine::Paint(fill) => graphic.begin_fill_style(fill), + PaintOrLine::Line(line) => graphic.begin_line_style(line), + } + } + } + + // If there's a change in right fill + if let Some(fill_id) = right_fill { + if *fill_id == 0 { + current_right_fill = None; + } else { + current_right_fill = Some(*fill_id); + graphic + .with_fill_style_mut(*fill_id) + .unwrap() + .push_new_shape(LineDirection::Right); + } + } + // If there's a change in left fill + if let Some(fill_id) = left_fill { + if *fill_id == 0 { + current_left_fill = None; + } else { + current_left_fill = Some(*fill_id); + graphic + .with_fill_style_mut(*fill_id) + .unwrap() + .push_new_shape(LineDirection::Left); + } + } + + some_fill_set = current_left_fill.is_some() || current_right_fill.is_some(); + both_fills_set = current_left_fill.is_some() && current_right_fill.is_some(); + both_fills_same = current_left_fill == current_right_fill; + both_fills_set_and_same = both_fills_set && both_fills_same; + + // If there's a change in line style + if let Some(style_id) = line_style { + if *style_id == 0 { + current_line_style = None; + } else { + current_line_style = Some(*style_id); + graphic + .with_line_style_mut(*style_id) + .unwrap() + .push_new_shape(LineDirection::Right); + } + } + + // Move to, start new shape fragments with the current styles. + if let Some(Vector2D { x, y }) = move_to { + let to: Point2 = Point2 { x: Twips(*x), y: Twips(*y) }; + prev_pos = Some(to); + + // If we didn't start a new shape for the current fill due to a fill + // style change earlier, we definitely want to start a new shape now, + // since each move_to command indicates a new shape fragment. + if let Some(current_right_fill) = current_right_fill { + graphic + .with_fill_style_mut(current_right_fill) + .unwrap() + .push_new_shape(LineDirection::Right); + } + if let Some(current_left_fill) = current_left_fill { + graphic + .with_fill_style_mut(current_left_fill) + .unwrap() + .push_new_shape(LineDirection::Left); + } + if let Some(current_line_style) = current_line_style { + // TODO(jon): Does the direction of this line depend on the current + // fill directions? + graphic + .with_line_style_mut(current_line_style) + .unwrap() + .push_new_shape(LineDirection::Right); + } + } + }, + ShapeRecord::Edge( + shape_records::Edge { + delta, + control_delta, + } + ) => { + let from = prev_pos.unwrap(); + let to = Point2 { + x: from.x + Twips(delta.x), + y: from.y + Twips(delta.y) + }; + prev_pos = Some(to); + let new_segment = LineSegment { + from, + to, + ctrl: control_delta.map(|Vector2D { x, y }| { + Point2 { + x: from.x + Twips(x), + y: from.y + Twips(y), + } + }), + }; + if some_fill_set && !both_fills_same { + for fill_id in [ + current_right_fill, + current_left_fill + ].iter() { + if let Some(fill_id) = fill_id { + graphic + .with_fill_style_mut(*fill_id) + .unwrap() + .current_shape_mut() + .add_line_segment(new_segment); + } + } + } else if both_fills_set_and_same { + for (fill_id, direction) in [ + (current_right_fill, LineDirection::Right), + (current_left_fill, LineDirection::Left) + ].iter() { + // NOTE: If both left and right fill are set the same, + // then we don't record the edge as part of the current shape; + // it's will just be an internal stroke inside an otherwise solid + // shape, and recording these edges as part of the shape means that + // we can't determine the closed shape outline later. + if let Some(fill_id) = fill_id { + graphic + .with_fill_style_mut(*fill_id) + .unwrap() + .push_new_shape(*direction); + } + } + } + if let Some(current_line_style) = current_line_style { + graphic + .with_line_style_mut(current_line_style) + .unwrap() + .current_shape_mut() + .add_line_segment(new_segment); + } + } + } + } + // NOTE: Consolidate current group of styles, joining edges of shapes/strokes where + // possible and forming closed shapes. In swf, all filled shapes should always be closed, + // so there will always be a solution for joining shape line segments together so that + // the start point and end point are coincident. + graphic.end_style_group(); + graphic +} + +fn find_matches( + mut first_open_index: usize, + shapes: &mut Vec, + reverse: bool +) -> Option> { + let mut dropped_pieces = None; + while first_open_index < shapes.len() { + // Take the last unclosed value, and try to join it onto + // one of the other unclosed values. + let mut last = shapes.pop().unwrap(); + if reverse { + last.reverse(); + } + let mut found_match = false; + for i in first_open_index..shapes.len() { + let fragment = &mut shapes[i]; + debug_assert!(!fragment.is_closed()); + if last.comes_after(fragment) { + // NOTE(jon): We do realloc quite a bit here, I wonder if it's worth trying + // to avoid that? Could do it with another level of indirection, where an outline + // is a list of fragments. + + // println!("app ({}, {})", last.reversed, fragment.reversed); + fragment.append_shape(&last); + found_match = true; + } else if last.comes_before(fragment) { + // println!("pre ({}, {})", last.reversed, fragment.reversed); + fragment.prepend_shape(&mut last); + found_match = true; + } + if found_match { + if fragment.is_closed() { + // Move the shape that was just closed to the left side of the current slice, + // and advance the cursor. + shapes.swap(first_open_index, i); + first_open_index += 1; + } + break; + } + } + if !found_match { + // Have we tried matching a reversed version of this segment? + // move last back onto the array, it will never be closed, presumably because + // it's a set of line segments rather than a shape that needs to be closed. + let dropped_pieces: &mut Vec = dropped_pieces.get_or_insert(Vec::new()); + dropped_pieces.push(last); + } + } + dropped_pieces +} + +pub(crate) struct GraphicLayers { + style_layers: Vec, + base_layer_offset: usize, + stroke_layer_offset: Option, +} + +impl GraphicLayers { + fn new() -> GraphicLayers { + GraphicLayers { style_layers: Vec::new(), stroke_layer_offset: None, base_layer_offset: 0 } + } + + fn begin_style_group(&mut self) { + self.stroke_layer_offset = None; + self.base_layer_offset = self.style_layers.len(); + } + + fn begin_fill_style(&mut self, fill: Paint) { + self.style_layers.push(StyleLayer { fill: PaintOrLine::Paint(fill), shapes: Vec::new() }) + } + + fn begin_line_style(&mut self, line: SwfLineStyle) { + if self.stroke_layer_offset.is_none() { + self.stroke_layer_offset = Some(self.style_layers.len()); + } + self.style_layers.push(StyleLayer { fill: PaintOrLine::Line(line), shapes: Vec::new() }) + } + + fn with_fill_style_mut(&mut self, fill_id: usize) -> Option<&mut StyleLayer> { + self.style_layers.get_mut(self.base_layer_offset + fill_id - 1) + } + + fn with_line_style_mut(&mut self, line_id: usize) -> Option<&mut StyleLayer> { + self.style_layers.get_mut((self.stroke_layer_offset.unwrap() + line_id) - 1) + } + + pub(crate) fn layers(&self) -> &Vec { + &self.style_layers + } + + fn end_style_group(&mut self) { + for style_layer in &mut self.style_layers[self.base_layer_offset..] { + // There can be an unused style group at the end of each layer, which we should remove. + if let Some(last) = style_layer.shapes().last() { + if last.len() == 0 { + style_layer.shapes_mut().pop(); + } + } + style_layer.consolidate_edges(); + } + } +} + diff --git a/flash/src/timeline.rs b/flash/src/timeline.rs new file mode 100644 index 00000000..662dba00 --- /dev/null +++ b/flash/src/timeline.rs @@ -0,0 +1,32 @@ +struct PlacementInfo { + symbol_id: u32, + translate_x: Twips, + translate_y: Twips, +} + +struct Timeline(Vec); + +impl Timeline { + fn first(&self) -> &Frame { + &self.0[0] + } + + fn last(&self) -> &Frame { + &self.0[self.0.len() - 1] + } + + fn first_mut(&mut self) -> &mut Frame { + &mut self.0[0] + } + + fn last_mut(&mut self) -> &mut Frame { + let last = self.0.len() - 1; + &mut self.0[last] + } +} + +struct Frame { + duration_frames_initial: u16, + duration_remaining_frames: u16, + placements: Vec +}