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Diffstat (limited to 'gfx/wr/webrender/src/resource_cache.rs')
| -rw-r--r-- | gfx/wr/webrender/src/resource_cache.rs | 2308 |
1 files changed, 2308 insertions, 0 deletions
diff --git a/gfx/wr/webrender/src/resource_cache.rs b/gfx/wr/webrender/src/resource_cache.rs new file mode 100644 index 0000000000..9459bf86da --- /dev/null +++ b/gfx/wr/webrender/src/resource_cache.rs @@ -0,0 +1,2308 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +use api::{BlobImageRequest, RasterizedBlobImage, ImageFormat, ImageDescriptorFlags}; +use api::{DebugFlags, FontInstanceKey, FontKey, FontTemplate, GlyphIndex}; +use api::{ExternalImageData, ExternalImageType, ExternalImageId, BlobImageResult}; +use api::{DirtyRect, GlyphDimensions, IdNamespace, DEFAULT_TILE_SIZE}; +use api::{ColorF, ImageData, ImageDescriptor, ImageKey, ImageRendering, TileSize}; +use api::{BlobImageHandler, BlobImageKey, VoidPtrToSizeFn}; +use api::units::*; +use euclid::size2; +use crate::{render_api::{ClearCache, AddFont, ResourceUpdate, MemoryReport}, util::WeakTable}; +use crate::image_tiling::{compute_tile_size, compute_tile_range}; +#[cfg(feature = "capture")] +use crate::capture::ExternalCaptureImage; +#[cfg(feature = "replay")] +use crate::capture::PlainExternalImage; +#[cfg(any(feature = "replay", feature = "png", feature="capture"))] +use crate::capture::CaptureConfig; +use crate::composite::{NativeSurfaceId, NativeSurfaceOperation, NativeTileId, NativeSurfaceOperationDetails}; +use crate::device::TextureFilter; +use crate::glyph_cache::{GlyphCache, CachedGlyphInfo}; +use crate::glyph_cache::GlyphCacheEntry; +use glyph_rasterizer::{GLYPH_FLASHING, FontInstance, GlyphFormat, GlyphKey, GlyphRasterizer, GlyphRasterJob}; +use glyph_rasterizer::{SharedFontResources, BaseFontInstance}; +use crate::gpu_cache::{GpuCache, GpuCacheAddress, GpuCacheHandle}; +use crate::gpu_types::UvRectKind; +use crate::internal_types::{ + CacheTextureId, FastHashMap, FastHashSet, TextureSource, ResourceUpdateList, + FrameId, FrameStamp, +}; +use crate::profiler::{self, TransactionProfile, bytes_to_mb}; +use crate::render_task_graph::{RenderTaskId, RenderTaskGraphBuilder}; +use crate::render_task_cache::{RenderTaskCache, RenderTaskCacheKey, RenderTaskParent}; +use crate::render_task_cache::{RenderTaskCacheEntry, RenderTaskCacheEntryHandle}; +use crate::renderer::GpuBufferBuilder; +use crate::surface::SurfaceBuilder; +use euclid::point2; +use smallvec::SmallVec; +use std::collections::hash_map::Entry::{self, Occupied, Vacant}; +use std::collections::hash_map::{Iter, IterMut}; +use std::collections::VecDeque; +use std::{cmp, mem}; +use std::fmt::Debug; +use std::hash::Hash; +use std::os::raw::c_void; +#[cfg(any(feature = "capture", feature = "replay"))] +use std::path::PathBuf; +use std::sync::Arc; +use std::sync::atomic::{AtomicUsize, Ordering}; +use std::u32; +use crate::texture_cache::{TextureCache, TextureCacheHandle, Eviction, TargetShader}; +use crate::picture_textures::PictureTextures; +use peek_poke::PeekPoke; + +// Counter for generating unique native surface ids +static NEXT_NATIVE_SURFACE_ID: AtomicUsize = AtomicUsize::new(0); + +#[cfg_attr(feature = "capture", derive(Serialize))] +#[cfg_attr(feature = "replay", derive(Deserialize))] +pub struct GlyphFetchResult { + pub index_in_text_run: i32, + pub uv_rect_address: GpuCacheAddress, + pub offset: DevicePoint, + pub size: DeviceIntSize, + pub scale: f32, +} + +// These coordinates are always in texels. +// They are converted to normalized ST +// values in the vertex shader. The reason +// for this is that the texture may change +// dimensions (e.g. the pages in a texture +// atlas can grow). When this happens, by +// storing the coordinates as texel values +// we don't need to go through and update +// various CPU-side structures. +#[derive(Debug, Clone)] +#[cfg_attr(feature = "capture", derive(Serialize))] +#[cfg_attr(feature = "replay", derive(Deserialize))] +pub struct CacheItem { + pub texture_id: TextureSource, + pub uv_rect_handle: GpuCacheHandle, + pub uv_rect: DeviceIntRect, + pub user_data: [f32; 4], +} + +impl CacheItem { + pub fn invalid() -> Self { + CacheItem { + texture_id: TextureSource::Invalid, + uv_rect_handle: GpuCacheHandle::new(), + uv_rect: DeviceIntRect::zero(), + user_data: [0.0; 4], + } + } + + pub fn is_valid(&self) -> bool { + self.texture_id != TextureSource::Invalid + } +} + +/// Represents the backing store of an image in the cache. +/// This storage can take several forms. +#[derive(Clone, Debug)] +pub enum CachedImageData { + /// A simple series of bytes, provided by the embedding and owned by WebRender. + /// The format is stored out-of-band, currently in ImageDescriptor. + Raw(Arc<Vec<u8>>), + /// An series of commands that can be rasterized into an image via an + /// embedding-provided callback. + /// + /// The commands are stored elsewhere and this variant is used as a placeholder. + Blob, + /// An image owned by the embedding, and referenced by WebRender. This may + /// take the form of a texture or a heap-allocated buffer. + External(ExternalImageData), +} + +impl From<ImageData> for CachedImageData { + fn from(img_data: ImageData) -> Self { + match img_data { + ImageData::Raw(data) => CachedImageData::Raw(data), + ImageData::External(data) => CachedImageData::External(data), + } + } +} + +impl CachedImageData { + /// Returns true if this represents a blob. + #[inline] + pub fn is_blob(&self) -> bool { + match *self { + CachedImageData::Blob => true, + _ => false, + } + } + + /// Returns true if this variant of CachedImageData should go through the texture + /// cache. + #[inline] + pub fn uses_texture_cache(&self) -> bool { + match *self { + CachedImageData::External(ref ext_data) => match ext_data.image_type { + ExternalImageType::TextureHandle(_) => false, + ExternalImageType::Buffer => true, + }, + CachedImageData::Blob => true, + CachedImageData::Raw(_) => true, + } + } +} + +#[derive(Debug)] +#[cfg_attr(feature = "capture", derive(Serialize))] +#[cfg_attr(feature = "replay", derive(Deserialize))] +pub struct ImageProperties { + pub descriptor: ImageDescriptor, + pub external_image: Option<ExternalImageData>, + pub tiling: Option<TileSize>, + // Potentially a subset of the image's total rectangle. This rectangle is what + // we map to the (layout space) display item bounds. + pub visible_rect: DeviceIntRect, +} + +#[derive(Debug, Copy, Clone, PartialEq)] +enum State { + Idle, + AddResources, + QueryResources, +} + +/// Post scene building state. +type RasterizedBlob = FastHashMap<TileOffset, RasterizedBlobImage>; + +#[cfg_attr(feature = "capture", derive(Serialize))] +#[cfg_attr(feature = "replay", derive(Deserialize))] +#[derive(Debug, Copy, Clone, PartialEq, PeekPoke, Default)] +pub struct ImageGeneration(pub u32); + +impl ImageGeneration { + pub const INVALID: ImageGeneration = ImageGeneration(u32::MAX); +} + +struct ImageResource { + data: CachedImageData, + descriptor: ImageDescriptor, + tiling: Option<TileSize>, + /// This is used to express images that are virtually very large + /// but with only a visible sub-set that is valid at a given time. + visible_rect: DeviceIntRect, + generation: ImageGeneration, +} + +#[derive(Clone, Debug)] +pub struct ImageTiling { + pub image_size: DeviceIntSize, + pub tile_size: TileSize, +} + +#[derive(Default)] +struct ImageTemplates { + images: FastHashMap<ImageKey, ImageResource>, +} + +impl ImageTemplates { + fn insert(&mut self, key: ImageKey, resource: ImageResource) { + self.images.insert(key, resource); + } + + fn remove(&mut self, key: ImageKey) -> Option<ImageResource> { + self.images.remove(&key) + } + + fn get(&self, key: ImageKey) -> Option<&ImageResource> { + self.images.get(&key) + } + + fn get_mut(&mut self, key: ImageKey) -> Option<&mut ImageResource> { + self.images.get_mut(&key) + } +} + +#[cfg_attr(feature = "capture", derive(Serialize))] +#[cfg_attr(feature = "replay", derive(Deserialize))] +struct CachedImageInfo { + texture_cache_handle: TextureCacheHandle, + dirty_rect: ImageDirtyRect, + manual_eviction: bool, +} + +impl CachedImageInfo { + fn mark_unused(&mut self, texture_cache: &mut TextureCache) { + texture_cache.evict_handle(&self.texture_cache_handle); + self.manual_eviction = false; + } +} + +#[cfg(debug_assertions)] +impl Drop for CachedImageInfo { + fn drop(&mut self) { + debug_assert!(!self.manual_eviction, "Manual eviction requires cleanup"); + } +} + +#[cfg_attr(feature = "capture", derive(Serialize))] +#[cfg_attr(feature = "replay", derive(Deserialize))] +pub struct ResourceClassCache<K: Hash + Eq, V, U: Default> { + resources: FastHashMap<K, V>, + pub user_data: U, +} + +impl<K, V, U> ResourceClassCache<K, V, U> +where + K: Clone + Hash + Eq + Debug, + U: Default, +{ + pub fn new() -> Self { + ResourceClassCache { + resources: FastHashMap::default(), + user_data: Default::default(), + } + } + + pub fn get(&self, key: &K) -> &V { + self.resources.get(key) + .expect("Didn't find a cached resource with that ID!") + } + + pub fn try_get(&self, key: &K) -> Option<&V> { + self.resources.get(key) + } + + pub fn insert(&mut self, key: K, value: V) { + self.resources.insert(key, value); + } + + pub fn remove(&mut self, key: &K) -> Option<V> { + self.resources.remove(key) + } + + pub fn get_mut(&mut self, key: &K) -> &mut V { + self.resources.get_mut(key) + .expect("Didn't find a cached resource with that ID!") + } + + pub fn try_get_mut(&mut self, key: &K) -> Option<&mut V> { + self.resources.get_mut(key) + } + + pub fn entry(&mut self, key: K) -> Entry<K, V> { + self.resources.entry(key) + } + + pub fn iter(&self) -> Iter<K, V> { + self.resources.iter() + } + + pub fn iter_mut(&mut self) -> IterMut<K, V> { + self.resources.iter_mut() + } + + pub fn is_empty(&mut self) -> bool { + self.resources.is_empty() + } + + pub fn clear(&mut self) { + self.resources.clear(); + } + + pub fn retain<F>(&mut self, f: F) + where + F: FnMut(&K, &mut V) -> bool, + { + self.resources.retain(f); + } +} + +#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)] +#[cfg_attr(feature = "capture", derive(Serialize))] +#[cfg_attr(feature = "replay", derive(Deserialize))] +struct CachedImageKey { + pub rendering: ImageRendering, + pub tile: Option<TileOffset>, +} + +#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)] +#[cfg_attr(feature = "capture", derive(Serialize))] +#[cfg_attr(feature = "replay", derive(Deserialize))] +pub struct ImageRequest { + pub key: ImageKey, + pub rendering: ImageRendering, + pub tile: Option<TileOffset>, +} + +impl ImageRequest { + pub fn with_tile(&self, offset: TileOffset) -> Self { + ImageRequest { + key: self.key, + rendering: self.rendering, + tile: Some(offset), + } + } + + pub fn is_untiled_auto(&self) -> bool { + self.tile.is_none() && self.rendering == ImageRendering::Auto + } +} + +impl Into<BlobImageRequest> for ImageRequest { + fn into(self) -> BlobImageRequest { + BlobImageRequest { + key: BlobImageKey(self.key), + tile: self.tile.unwrap(), + } + } +} + +impl Into<CachedImageKey> for ImageRequest { + fn into(self) -> CachedImageKey { + CachedImageKey { + rendering: self.rendering, + tile: self.tile, + } + } +} + +#[derive(Debug)] +#[cfg_attr(feature = "capture", derive(Clone, Serialize))] +#[cfg_attr(feature = "replay", derive(Deserialize))] +pub enum ImageCacheError { + OverLimitSize, +} + +#[cfg_attr(feature = "capture", derive(Serialize))] +#[cfg_attr(feature = "replay", derive(Deserialize))] +enum ImageResult { + UntiledAuto(CachedImageInfo), + Multi(ResourceClassCache<CachedImageKey, CachedImageInfo, ()>), + Err(ImageCacheError), +} + +impl ImageResult { + /// Releases any texture cache entries held alive by this ImageResult. + fn drop_from_cache(&mut self, texture_cache: &mut TextureCache) { + match *self { + ImageResult::UntiledAuto(ref mut entry) => { + entry.mark_unused(texture_cache); + }, + ImageResult::Multi(ref mut entries) => { + for entry in entries.resources.values_mut() { + entry.mark_unused(texture_cache); + } + }, + ImageResult::Err(_) => {}, + } + } +} + +type ImageCache = ResourceClassCache<ImageKey, ImageResult, ()>; + +struct Resources { + fonts: SharedFontResources, + image_templates: ImageTemplates, + // We keep a set of Weak references to the fonts so that we're able to include them in memory + // reports even if only the OS is holding on to the Vec<u8>. PtrWeakHashSet will periodically + // drop any references that have gone dead. + weak_fonts: WeakTable +} + +// We only use this to report glyph dimensions to the user of the API, so using +// the font instance key should be enough. If we start using it to cache dimensions +// for internal font instances we should change the hash key accordingly. +pub type GlyphDimensionsCache = FastHashMap<(FontInstanceKey, GlyphIndex), Option<GlyphDimensions>>; + +#[derive(Clone, Copy, Debug, PartialEq)] +pub struct BlobImageRasterizerEpoch(usize); + +/// Internal information about allocated render targets in the pool +struct RenderTarget { + size: DeviceIntSize, + format: ImageFormat, + texture_id: CacheTextureId, + /// If true, this is currently leant out, and not available to other passes + is_active: bool, + last_frame_used: FrameId, +} + +impl RenderTarget { + fn size_in_bytes(&self) -> usize { + let bpp = self.format.bytes_per_pixel() as usize; + (self.size.width * self.size.height) as usize * bpp + } + + /// Returns true if this texture was used within `threshold` frames of + /// the current frame. + pub fn used_recently(&self, current_frame_id: FrameId, threshold: u64) -> bool { + self.last_frame_used + threshold >= current_frame_id + } +} + +/// High-level container for resources managed by the `RenderBackend`. +/// +/// This includes a variety of things, including images, fonts, and glyphs, +/// which may be stored as memory buffers, GPU textures, or handles to resources +/// managed by the OS or other parts of WebRender. +pub struct ResourceCache { + cached_glyphs: GlyphCache, + cached_images: ImageCache, + cached_render_tasks: RenderTaskCache, + + resources: Resources, + state: State, + current_frame_id: FrameId, + + #[cfg(feature = "capture")] + /// Used for capture sequences. If the resource cache is updated, then we + /// mark it as dirty. When the next frame is captured in the sequence, we + /// dump the state of the resource cache. + capture_dirty: bool, + + pub texture_cache: TextureCache, + pub picture_textures: PictureTextures, + + /// TODO(gw): We should expire (parts of) this cache semi-regularly! + cached_glyph_dimensions: GlyphDimensionsCache, + glyph_rasterizer: GlyphRasterizer, + + /// The set of images that aren't present or valid in the texture cache, + /// and need to be rasterized and/or uploaded this frame. This includes + /// both blobs and regular images. + pending_image_requests: FastHashSet<ImageRequest>, + + rasterized_blob_images: FastHashMap<BlobImageKey, RasterizedBlob>, + + /// A log of the last three frames worth of deleted image keys kept + /// for debugging purposes. + deleted_blob_keys: VecDeque<Vec<BlobImageKey>>, + + /// We keep one around to be able to call clear_namespace + /// after the api object is deleted. For most purposes the + /// api object's blob handler should be used instead. + blob_image_handler: Option<Box<dyn BlobImageHandler>>, + + /// A list of queued compositor surface updates to apply next frame. + pending_native_surface_updates: Vec<NativeSurfaceOperation>, + + image_templates_memory: usize, + font_templates_memory: usize, + + /// A pool of render targets for use by the render task graph + render_target_pool: Vec<RenderTarget>, +} + +impl ResourceCache { + pub fn new( + texture_cache: TextureCache, + picture_textures: PictureTextures, + glyph_rasterizer: GlyphRasterizer, + cached_glyphs: GlyphCache, + fonts: SharedFontResources, + blob_image_handler: Option<Box<dyn BlobImageHandler>>, + ) -> Self { + ResourceCache { + cached_glyphs, + cached_images: ResourceClassCache::new(), + cached_render_tasks: RenderTaskCache::new(), + resources: Resources { + fonts, + image_templates: ImageTemplates::default(), + weak_fonts: WeakTable::new(), + }, + cached_glyph_dimensions: FastHashMap::default(), + texture_cache, + picture_textures, + state: State::Idle, + current_frame_id: FrameId::INVALID, + pending_image_requests: FastHashSet::default(), + glyph_rasterizer, + rasterized_blob_images: FastHashMap::default(), + // We want to keep three frames worth of delete blob keys + deleted_blob_keys: vec![Vec::new(), Vec::new(), Vec::new()].into(), + blob_image_handler, + pending_native_surface_updates: Vec::new(), + #[cfg(feature = "capture")] + capture_dirty: true, + image_templates_memory: 0, + font_templates_memory: 0, + render_target_pool: Vec::new(), + } + } + + /// Construct a resource cache for use in unit tests. + #[cfg(test)] + pub fn new_for_testing() -> Self { + use rayon::ThreadPoolBuilder; + + let texture_cache = TextureCache::new_for_testing( + 4096, + ImageFormat::RGBA8, + ); + let workers = Arc::new(ThreadPoolBuilder::new().build().unwrap()); + let glyph_rasterizer = GlyphRasterizer::new(workers, true); + let cached_glyphs = GlyphCache::new(); + let fonts = SharedFontResources::new(IdNamespace(0)); + let picture_textures = PictureTextures::new( + crate::picture::TILE_SIZE_DEFAULT, + TextureFilter::Nearest, + ); + + ResourceCache::new( + texture_cache, + picture_textures, + glyph_rasterizer, + cached_glyphs, + fonts, + None, + ) + } + + pub fn max_texture_size(&self) -> i32 { + self.texture_cache.max_texture_size() + } + + /// Maximum texture size before we consider it preferrable to break the texture + /// into tiles. + pub fn tiling_threshold(&self) -> i32 { + self.texture_cache.tiling_threshold() + } + + pub fn enable_multithreading(&mut self, enable: bool) { + self.glyph_rasterizer.enable_multithreading(enable); + } + + fn should_tile(limit: i32, descriptor: &ImageDescriptor, data: &CachedImageData) -> bool { + let size_check = descriptor.size.width > limit || descriptor.size.height > limit; + match *data { + CachedImageData::Raw(_) | CachedImageData::Blob => size_check, + CachedImageData::External(info) => { + // External handles already represent existing textures so it does + // not make sense to tile them into smaller ones. + info.image_type == ExternalImageType::Buffer && size_check + } + } + } + + // Request the texture cache item for a cacheable render + // task. If the item is already cached, the texture cache + // handle will be returned. Otherwise, the user supplied + // closure will be invoked to generate the render task + // chain that is required to draw this task. + pub fn request_render_task<F>( + &mut self, + key: RenderTaskCacheKey, + gpu_cache: &mut GpuCache, + gpu_buffer_builder: &mut GpuBufferBuilder, + rg_builder: &mut RenderTaskGraphBuilder, + user_data: Option<[f32; 4]>, + is_opaque: bool, + parent: RenderTaskParent, + surface_builder: &mut SurfaceBuilder, + f: F, + ) -> RenderTaskId + where + F: FnOnce(&mut RenderTaskGraphBuilder, &mut GpuBufferBuilder) -> RenderTaskId, + { + self.cached_render_tasks.request_render_task( + key, + &mut self.texture_cache, + gpu_cache, + gpu_buffer_builder, + rg_builder, + user_data, + is_opaque, + parent, + surface_builder, + |render_graph, gpu_buffer_builder| Ok(f(render_graph, gpu_buffer_builder)) + ).expect("Failed to request a render task from the resource cache!") + } + + pub fn post_scene_building_update( + &mut self, + updates: Vec<ResourceUpdate>, + profile: &mut TransactionProfile, + ) { + // TODO, there is potential for optimization here, by processing updates in + // bulk rather than one by one (for example by sorting allocations by size or + // in a way that reduces fragmentation in the atlas). + #[cfg(feature = "capture")] + match updates.is_empty() { + false => self.capture_dirty = true, + _ => {}, + } + + for update in updates { + match update { + ResourceUpdate::AddImage(img) => { + if let ImageData::Raw(ref bytes) = img.data { + self.image_templates_memory += bytes.len(); + profile.set(profiler::IMAGE_TEMPLATES_MEM, bytes_to_mb(self.image_templates_memory)); + } + self.add_image_template( + img.key, + img.descriptor, + img.data.into(), + &img.descriptor.size.into(), + img.tiling, + ); + profile.set(profiler::IMAGE_TEMPLATES, self.resources.image_templates.images.len()); + } + ResourceUpdate::UpdateImage(img) => { + self.update_image_template(img.key, img.descriptor, img.data.into(), &img.dirty_rect); + } + ResourceUpdate::AddBlobImage(img) => { + self.add_image_template( + img.key.as_image(), + img.descriptor, + CachedImageData::Blob, + &img.visible_rect, + Some(img.tile_size), + ); + } + ResourceUpdate::UpdateBlobImage(img) => { + self.update_image_template( + img.key.as_image(), + img.descriptor, + CachedImageData::Blob, + &to_image_dirty_rect( + &img.dirty_rect + ), + ); + self.discard_tiles_outside_visible_area(img.key, &img.visible_rect); // TODO: remove? + self.set_image_visible_rect(img.key.as_image(), &img.visible_rect); + } + ResourceUpdate::DeleteImage(img) => { + self.delete_image_template(img); + profile.set(profiler::IMAGE_TEMPLATES, self.resources.image_templates.images.len()); + profile.set(profiler::IMAGE_TEMPLATES_MEM, bytes_to_mb(self.image_templates_memory)); + } + ResourceUpdate::DeleteBlobImage(img) => { + self.delete_image_template(img.as_image()); + } + ResourceUpdate::DeleteFont(font) => { + if let Some(shared_key) = self.resources.fonts.font_keys.delete_key(&font) { + self.delete_font_template(shared_key); + if let Some(ref mut handler) = &mut self.blob_image_handler { + handler.delete_font(shared_key); + } + profile.set(profiler::FONT_TEMPLATES, self.resources.fonts.templates.len()); + profile.set(profiler::FONT_TEMPLATES_MEM, bytes_to_mb(self.font_templates_memory)); + } + } + ResourceUpdate::DeleteFontInstance(font) => { + if let Some(shared_key) = self.resources.fonts.instance_keys.delete_key(&font) { + self.delete_font_instance(shared_key); + } + if let Some(ref mut handler) = &mut self.blob_image_handler { + handler.delete_font_instance(font); + } + } + ResourceUpdate::SetBlobImageVisibleArea(key, area) => { + self.discard_tiles_outside_visible_area(key, &area); + self.set_image_visible_rect(key.as_image(), &area); + } + ResourceUpdate::AddFont(font) => { + // The shared key was already added in ApiResources, but the first time it is + // seen on the backend we still need to do some extra initialization here. + let (key, template) = match font { + AddFont::Raw(key, bytes, index) => { + (key, FontTemplate::Raw(bytes, index)) + } + AddFont::Native(key, native_font_handle) => { + (key, FontTemplate::Native(native_font_handle)) + } + }; + let shared_key = self.resources.fonts.font_keys.map_key(&key); + if !self.glyph_rasterizer.has_font(shared_key) { + self.add_font_template(shared_key, template); + profile.set(profiler::FONT_TEMPLATES, self.resources.fonts.templates.len()); + profile.set(profiler::FONT_TEMPLATES_MEM, bytes_to_mb(self.font_templates_memory)); + } + } + ResourceUpdate::AddFontInstance(..) => { + // Already added in ApiResources. + } + } + } + } + + pub fn add_rasterized_blob_images( + &mut self, + images: Vec<(BlobImageRequest, BlobImageResult)>, + profile: &mut TransactionProfile, + ) { + for (request, result) in images { + let data = match result { + Ok(data) => data, + Err(..) => { + warn!("Failed to rasterize a blob image"); + continue; + } + }; + + profile.add(profiler::RASTERIZED_BLOBS_PX, data.rasterized_rect.area()); + + // First make sure we have an entry for this key (using a placeholder + // if need be). + let tiles = self.rasterized_blob_images.entry(request.key).or_insert_with( + || { RasterizedBlob::default() } + ); + + tiles.insert(request.tile, data); + + match self.cached_images.try_get_mut(&request.key.as_image()) { + Some(&mut ImageResult::Multi(ref mut entries)) => { + let cached_key = CachedImageKey { + rendering: ImageRendering::Auto, // TODO(nical) + tile: Some(request.tile), + }; + if let Some(entry) = entries.try_get_mut(&cached_key) { + entry.dirty_rect = DirtyRect::All; + } + } + _ => {} + } + } + } + + pub fn add_font_template(&mut self, font_key: FontKey, template: FontTemplate) { + // Push the new font to the font renderer, and also store + // it locally for glyph metric requests. + if let FontTemplate::Raw(ref data, _) = template { + self.resources.weak_fonts.insert(Arc::downgrade(data)); + self.font_templates_memory += data.len(); + } + self.glyph_rasterizer.add_font(font_key, template.clone()); + self.resources.fonts.templates.add_font(font_key, template); + } + + pub fn delete_font_template(&mut self, font_key: FontKey) { + self.glyph_rasterizer.delete_font(font_key); + if let Some(FontTemplate::Raw(data, _)) = self.resources.fonts.templates.delete_font(&font_key) { + self.font_templates_memory -= data.len(); + } + self.cached_glyphs.delete_fonts(&[font_key]); + } + + pub fn delete_font_instance(&mut self, instance_key: FontInstanceKey) { + self.resources.fonts.instances.delete_font_instance(instance_key); + } + + pub fn get_font_instance(&self, instance_key: FontInstanceKey) -> Option<Arc<BaseFontInstance>> { + self.resources.fonts.instances.get_font_instance(instance_key) + } + + pub fn get_fonts(&self) -> SharedFontResources { + self.resources.fonts.clone() + } + + pub fn add_image_template( + &mut self, + image_key: ImageKey, + descriptor: ImageDescriptor, + data: CachedImageData, + visible_rect: &DeviceIntRect, + mut tiling: Option<TileSize>, + ) { + if let Some(ref mut tile_size) = tiling { + // Sanitize the value since it can be set by a pref. + *tile_size = (*tile_size).max(16).min(2048); + } + + if tiling.is_none() && Self::should_tile(self.tiling_threshold(), &descriptor, &data) { + // We aren't going to be able to upload a texture this big, so tile it, even + // if tiling was not requested. + tiling = Some(DEFAULT_TILE_SIZE); + } + + let resource = ImageResource { + descriptor, + data, + tiling, + visible_rect: *visible_rect, + generation: ImageGeneration(0), + }; + + self.resources.image_templates.insert(image_key, resource); + } + + pub fn update_image_template( + &mut self, + image_key: ImageKey, + descriptor: ImageDescriptor, + data: CachedImageData, + dirty_rect: &ImageDirtyRect, + ) { + let tiling_threshold = self.tiling_threshold(); + let image = match self.resources.image_templates.get_mut(image_key) { + Some(res) => res, + None => panic!("Attempt to update non-existent image"), + }; + + let mut tiling = image.tiling; + if tiling.is_none() && Self::should_tile(tiling_threshold, &descriptor, &data) { + tiling = Some(DEFAULT_TILE_SIZE); + } + + // Each cache entry stores its own copy of the image's dirty rect. This allows them to be + // updated independently. + match self.cached_images.try_get_mut(&image_key) { + Some(&mut ImageResult::UntiledAuto(ref mut entry)) => { + entry.dirty_rect = entry.dirty_rect.union(dirty_rect); + } + Some(&mut ImageResult::Multi(ref mut entries)) => { + for (key, entry) in entries.iter_mut() { + // We want the dirty rect relative to the tile and not the whole image. + let local_dirty_rect = match (tiling, key.tile) { + (Some(tile_size), Some(tile)) => { + dirty_rect.map(|mut rect|{ + let tile_offset = DeviceIntPoint::new( + tile.x as i32, + tile.y as i32, + ) * tile_size as i32; + rect = rect.translate(-tile_offset.to_vector()); + + let tile_rect = compute_tile_size( + &descriptor.size.into(), + tile_size, + tile, + ).into(); + + rect.intersection(&tile_rect).unwrap_or_else(DeviceIntRect::zero) + }) + } + (None, Some(..)) => DirtyRect::All, + _ => *dirty_rect, + }; + entry.dirty_rect = entry.dirty_rect.union(&local_dirty_rect); + } + } + _ => {} + } + + if image.descriptor.format != descriptor.format { + // could be a stronger warning/error? + trace!("Format change {:?} -> {:?}", image.descriptor.format, descriptor.format); + } + *image = ImageResource { + descriptor, + data, + tiling, + visible_rect: descriptor.size.into(), + generation: ImageGeneration(image.generation.0 + 1), + }; + } + + pub fn delete_image_template(&mut self, image_key: ImageKey) { + // Remove the template. + let value = self.resources.image_templates.remove(image_key); + + // Release the corresponding texture cache entry, if any. + if let Some(mut cached) = self.cached_images.remove(&image_key) { + cached.drop_from_cache(&mut self.texture_cache); + } + + match value { + Some(image) => if image.data.is_blob() { + if let CachedImageData::Raw(data) = image.data { + self.image_templates_memory -= data.len(); + } + + let blob_key = BlobImageKey(image_key); + self.deleted_blob_keys.back_mut().unwrap().push(blob_key); + self.rasterized_blob_images.remove(&blob_key); + }, + None => { + warn!("Delete the non-exist key"); + debug!("key={:?}", image_key); + } + } + } + + /// Return the current generation of an image template + pub fn get_image_generation(&self, key: ImageKey) -> ImageGeneration { + self.resources + .image_templates + .get(key) + .map_or(ImageGeneration::INVALID, |template| template.generation) + } + + /// Requests an image to ensure that it will be in the texture cache this frame. + /// + /// returns the size in device pixel of the image or tile. + pub fn request_image( + &mut self, + request: ImageRequest, + gpu_cache: &mut GpuCache, + ) -> DeviceIntSize { + debug_assert_eq!(self.state, State::AddResources); + + let template = match self.resources.image_templates.get(request.key) { + Some(template) => template, + None => { + warn!("ERROR: Trying to render deleted / non-existent key"); + debug!("key={:?}", request.key); + return DeviceIntSize::zero(); + } + }; + + let size = match request.tile { + Some(tile) => compute_tile_size(&template.visible_rect, template.tiling.unwrap(), tile), + None => template.descriptor.size, + }; + + // Images that don't use the texture cache can early out. + if !template.data.uses_texture_cache() { + return size; + } + + let side_size = + template.tiling.map_or(cmp::max(template.descriptor.size.width, template.descriptor.size.height), + |tile_size| tile_size as i32); + if side_size > self.texture_cache.max_texture_size() { + // The image or tiling size is too big for hardware texture size. + warn!("Dropping image, image:(w:{},h:{}, tile:{}) is too big for hardware!", + template.descriptor.size.width, template.descriptor.size.height, template.tiling.unwrap_or(0)); + self.cached_images.insert(request.key, ImageResult::Err(ImageCacheError::OverLimitSize)); + return DeviceIntSize::zero(); + } + + let storage = match self.cached_images.entry(request.key) { + Occupied(e) => { + // We might have an existing untiled entry, and need to insert + // a second entry. In such cases we need to move the old entry + // out first, replacing it with a dummy entry, and then creating + // the tiled/multi-entry variant. + let entry = e.into_mut(); + if !request.is_untiled_auto() { + let untiled_entry = match entry { + &mut ImageResult::UntiledAuto(ref mut entry) => { + Some(mem::replace(entry, CachedImageInfo { + texture_cache_handle: TextureCacheHandle::invalid(), + dirty_rect: DirtyRect::All, + manual_eviction: false, + })) + } + _ => None + }; + + if let Some(untiled_entry) = untiled_entry { + let mut entries = ResourceClassCache::new(); + let untiled_key = CachedImageKey { + rendering: ImageRendering::Auto, + tile: None, + }; + entries.insert(untiled_key, untiled_entry); + *entry = ImageResult::Multi(entries); + } + } + entry + } + Vacant(entry) => { + entry.insert(if request.is_untiled_auto() { + ImageResult::UntiledAuto(CachedImageInfo { + texture_cache_handle: TextureCacheHandle::invalid(), + dirty_rect: DirtyRect::All, + manual_eviction: false, + }) + } else { + ImageResult::Multi(ResourceClassCache::new()) + }) + } + }; + + // If this image exists in the texture cache, *and* the dirty rect + // in the cache is empty, then it is valid to use as-is. + let entry = match *storage { + ImageResult::UntiledAuto(ref mut entry) => entry, + ImageResult::Multi(ref mut entries) => { + entries.entry(request.into()) + .or_insert(CachedImageInfo { + texture_cache_handle: TextureCacheHandle::invalid(), + dirty_rect: DirtyRect::All, + manual_eviction: false, + }) + }, + ImageResult::Err(_) => panic!("Errors should already have been handled"), + }; + + let needs_upload = self.texture_cache.request(&entry.texture_cache_handle, gpu_cache); + + if !needs_upload && entry.dirty_rect.is_empty() { + return size; + } + + if !self.pending_image_requests.insert(request) { + return size; + } + + if template.data.is_blob() { + let request: BlobImageRequest = request.into(); + let missing = match self.rasterized_blob_images.get(&request.key) { + Some(tiles) => !tiles.contains_key(&request.tile), + _ => true, + }; + + assert!(!missing); + } + + size + } + + fn discard_tiles_outside_visible_area( + &mut self, + key: BlobImageKey, + area: &DeviceIntRect + ) { + let tile_size = match self.resources.image_templates.get(key.as_image()) { + Some(template) => template.tiling.unwrap(), + None => { + //debug!("Missing image template (key={:?})!", key); + return; + } + }; + + let tiles = match self.rasterized_blob_images.get_mut(&key) { + Some(tiles) => tiles, + _ => { return; } + }; + + let tile_range = compute_tile_range( + &area, + tile_size, + ); + + tiles.retain(|tile, _| { tile_range.contains(*tile) }); + + let texture_cache = &mut self.texture_cache; + match self.cached_images.try_get_mut(&key.as_image()) { + Some(&mut ImageResult::Multi(ref mut entries)) => { + entries.retain(|key, entry| { + if key.tile.is_none() || tile_range.contains(key.tile.unwrap()) { + return true; + } + entry.mark_unused(texture_cache); + return false; + }); + } + _ => {} + } + } + + fn set_image_visible_rect(&mut self, key: ImageKey, rect: &DeviceIntRect) { + if let Some(image) = self.resources.image_templates.get_mut(key) { + image.visible_rect = *rect; + image.descriptor.size = rect.size(); + } + } + + pub fn request_glyphs( + &mut self, + mut font: FontInstance, + glyph_keys: &[GlyphKey], + gpu_cache: &mut GpuCache, + ) { + debug_assert_eq!(self.state, State::AddResources); + + self.glyph_rasterizer.prepare_font(&mut font); + let glyph_key_cache = self.cached_glyphs.insert_glyph_key_cache_for_font(&font); + let texture_cache = &mut self.texture_cache; + self.glyph_rasterizer.request_glyphs( + font, + glyph_keys, + |key| { + if let Some(entry) = glyph_key_cache.try_get(key) { + match entry { + GlyphCacheEntry::Cached(ref glyph) => { + // Skip the glyph if it is already has a valid texture cache handle. + if !texture_cache.request(&glyph.texture_cache_handle, gpu_cache) { + return false; + } + // This case gets hit when we already rasterized the glyph, but the + // glyph has been evicted from the texture cache. Just force it to + // pending so it gets rematerialized. + } + // Otherwise, skip the entry if it is blank or pending. + GlyphCacheEntry::Blank | GlyphCacheEntry::Pending => return false, + } + }; + + glyph_key_cache.add_glyph(*key, GlyphCacheEntry::Pending); + + true + } + ); + } + + pub fn pending_updates(&mut self) -> ResourceUpdateList { + ResourceUpdateList { + texture_updates: self.texture_cache.pending_updates(), + native_surface_updates: mem::replace(&mut self.pending_native_surface_updates, Vec::new()), + } + } + + pub fn fetch_glyphs<F>( + &self, + mut font: FontInstance, + glyph_keys: &[GlyphKey], + fetch_buffer: &mut Vec<GlyphFetchResult>, + gpu_cache: &mut GpuCache, + mut f: F, + ) where + F: FnMut(TextureSource, GlyphFormat, &[GlyphFetchResult]), + { + debug_assert_eq!(self.state, State::QueryResources); + + self.glyph_rasterizer.prepare_font(&mut font); + let glyph_key_cache = self.cached_glyphs.get_glyph_key_cache_for_font(&font); + + let mut current_texture_id = TextureSource::Invalid; + let mut current_glyph_format = GlyphFormat::Subpixel; + debug_assert!(fetch_buffer.is_empty()); + + for (loop_index, key) in glyph_keys.iter().enumerate() { + let (cache_item, glyph_format) = match *glyph_key_cache.get(key) { + GlyphCacheEntry::Cached(ref glyph) => { + (self.texture_cache.get(&glyph.texture_cache_handle), glyph.format) + } + GlyphCacheEntry::Blank | GlyphCacheEntry::Pending => continue, + }; + if current_texture_id != cache_item.texture_id || + current_glyph_format != glyph_format { + if !fetch_buffer.is_empty() { + f(current_texture_id, current_glyph_format, fetch_buffer); + fetch_buffer.clear(); + } + current_texture_id = cache_item.texture_id; + current_glyph_format = glyph_format; + } + fetch_buffer.push(GlyphFetchResult { + index_in_text_run: loop_index as i32, + uv_rect_address: gpu_cache.get_address(&cache_item.uv_rect_handle), + offset: DevicePoint::new(cache_item.user_data[0], cache_item.user_data[1]), + size: cache_item.uv_rect.size(), + scale: cache_item.user_data[2], + }); + } + + if !fetch_buffer.is_empty() { + f(current_texture_id, current_glyph_format, fetch_buffer); + fetch_buffer.clear(); + } + } + + pub fn map_font_key(&self, key: FontKey) -> FontKey { + self.resources.fonts.font_keys.map_key(&key) + } + + pub fn map_font_instance_key(&self, key: FontInstanceKey) -> FontInstanceKey { + self.resources.fonts.instance_keys.map_key(&key) + } + + pub fn get_glyph_dimensions( + &mut self, + font: &FontInstance, + glyph_index: GlyphIndex, + ) -> Option<GlyphDimensions> { + match self.cached_glyph_dimensions.entry((font.instance_key, glyph_index)) { + Occupied(entry) => *entry.get(), + Vacant(entry) => *entry.insert( + self.glyph_rasterizer + .get_glyph_dimensions(font, glyph_index), + ), + } + } + + pub fn get_glyph_index(&mut self, font_key: FontKey, ch: char) -> Option<u32> { + self.glyph_rasterizer.get_glyph_index(font_key, ch) + } + + #[inline] + pub fn get_cached_image(&self, request: ImageRequest) -> Result<CacheItem, ()> { + debug_assert_eq!(self.state, State::QueryResources); + let image_info = self.get_image_info(request)?; + Ok(self.get_texture_cache_item(&image_info.texture_cache_handle)) + } + + pub fn get_cached_render_task( + &self, + handle: &RenderTaskCacheEntryHandle, + ) -> &RenderTaskCacheEntry { + self.cached_render_tasks.get_cache_entry(handle) + } + + #[inline] + fn get_image_info(&self, request: ImageRequest) -> Result<&CachedImageInfo, ()> { + // TODO(Jerry): add a debug option to visualize the corresponding area for + // the Err() case of CacheItem. + match *self.cached_images.get(&request.key) { + ImageResult::UntiledAuto(ref image_info) => Ok(image_info), + ImageResult::Multi(ref entries) => Ok(entries.get(&request.into())), + ImageResult::Err(_) => Err(()), + } + } + + #[inline] + pub fn get_texture_cache_item(&self, handle: &TextureCacheHandle) -> CacheItem { + self.texture_cache.get(handle) + } + + pub fn get_image_properties(&self, image_key: ImageKey) -> Option<ImageProperties> { + let image_template = &self.resources.image_templates.get(image_key); + + image_template.map(|image_template| { + let external_image = match image_template.data { + CachedImageData::External(ext_image) => match ext_image.image_type { + ExternalImageType::TextureHandle(_) => Some(ext_image), + // external buffer uses resource_cache. + ExternalImageType::Buffer => None, + }, + // raw and blob image are all using resource_cache. + CachedImageData::Raw(..) | CachedImageData::Blob => None, + }; + + ImageProperties { + descriptor: image_template.descriptor, + external_image, + tiling: image_template.tiling, + visible_rect: image_template.visible_rect, + } + }) + } + + pub fn begin_frame(&mut self, stamp: FrameStamp, gpu_cache: &mut GpuCache, profile: &mut TransactionProfile) { + profile_scope!("begin_frame"); + debug_assert_eq!(self.state, State::Idle); + self.state = State::AddResources; + self.texture_cache.begin_frame(stamp, profile); + self.picture_textures.begin_frame(stamp, &mut self.texture_cache.pending_updates); + + self.cached_glyphs.begin_frame( + stamp, + &mut self.texture_cache, + &mut self.glyph_rasterizer, + ); + self.cached_render_tasks.begin_frame(&mut self.texture_cache); + self.current_frame_id = stamp.frame_id(); + + // pop the old frame and push a new one + self.deleted_blob_keys.pop_front(); + self.deleted_blob_keys.push_back(Vec::new()); + + self.texture_cache.run_compaction(gpu_cache); + } + + pub fn block_until_all_resources_added( + &mut self, + gpu_cache: &mut GpuCache, + profile: &mut TransactionProfile, + ) { + profile_scope!("block_until_all_resources_added"); + + debug_assert_eq!(self.state, State::AddResources); + self.state = State::QueryResources; + + let cached_glyphs = &mut self.cached_glyphs; + let texture_cache = &mut self.texture_cache; + + self.glyph_rasterizer.resolve_glyphs( + |job, can_use_r8_format| { + let GlyphRasterJob { font, key, result } = job; + let glyph_key_cache = cached_glyphs.get_glyph_key_cache_for_font_mut(&*font); + let glyph_info = match result { + Err(_) => GlyphCacheEntry::Blank, + Ok(ref glyph) if glyph.width == 0 || glyph.height == 0 => { + GlyphCacheEntry::Blank + } + Ok(glyph) => { + let mut texture_cache_handle = TextureCacheHandle::invalid(); + texture_cache.request(&texture_cache_handle, gpu_cache); + texture_cache.update( + &mut texture_cache_handle, + ImageDescriptor { + size: size2(glyph.width, glyph.height), + stride: None, + format: glyph.format.image_format(can_use_r8_format), + flags: ImageDescriptorFlags::empty(), + offset: 0, + }, + TextureFilter::Linear, + Some(CachedImageData::Raw(Arc::new(glyph.bytes))), + [glyph.left, -glyph.top, glyph.scale, 0.0], + DirtyRect::All, + gpu_cache, + Some(glyph_key_cache.eviction_notice()), + UvRectKind::Rect, + Eviction::Auto, + TargetShader::Text, + ); + GlyphCacheEntry::Cached(CachedGlyphInfo { + texture_cache_handle, + format: glyph.format, + }) + } + }; + glyph_key_cache.insert(key, glyph_info); + }, + profile, + ); + + // Apply any updates of new / updated images (incl. blobs) to the texture cache. + self.update_texture_cache(gpu_cache); + } + + fn update_texture_cache(&mut self, gpu_cache: &mut GpuCache) { + profile_scope!("update_texture_cache"); + for request in self.pending_image_requests.drain() { + let image_template = self.resources.image_templates.get_mut(request.key).unwrap(); + debug_assert!(image_template.data.uses_texture_cache()); + + let mut updates: SmallVec<[(CachedImageData, Option<DeviceIntRect>); 1]> = SmallVec::new(); + + match image_template.data { + CachedImageData::Raw(..) | CachedImageData::External(..) => { + // Safe to clone here since the Raw image data is an + // Arc, and the external image data is small. + updates.push((image_template.data.clone(), None)); + } + CachedImageData::Blob => { + let blob_image = self.rasterized_blob_images.get_mut(&BlobImageKey(request.key)).unwrap(); + let img = &blob_image[&request.tile.unwrap()]; + updates.push(( + CachedImageData::Raw(Arc::clone(&img.data)), + Some(img.rasterized_rect) + )); + } + }; + + for (image_data, blob_rasterized_rect) in updates { + let entry = match *self.cached_images.get_mut(&request.key) { + ImageResult::UntiledAuto(ref mut entry) => entry, + ImageResult::Multi(ref mut entries) => entries.get_mut(&request.into()), + ImageResult::Err(_) => panic!("Update requested for invalid entry") + }; + + let mut descriptor = image_template.descriptor.clone(); + let mut dirty_rect = entry.dirty_rect.replace_with_empty(); + + if let Some(tile) = request.tile { + let tile_size = image_template.tiling.unwrap(); + let clipped_tile_size = compute_tile_size(&image_template.visible_rect, tile_size, tile); + // The tiled image could be stored on the CPU as one large image or be + // already broken up into tiles. This affects the way we compute the stride + // and offset. + let tiled_on_cpu = image_template.data.is_blob(); + if !tiled_on_cpu { + // we don't expect to have partial tiles at the top and left of non-blob + // images. + debug_assert_eq!(image_template.visible_rect.min, point2(0, 0)); + let bpp = descriptor.format.bytes_per_pixel(); + let stride = descriptor.compute_stride(); + descriptor.stride = Some(stride); + descriptor.offset += + tile.y as i32 * tile_size as i32 * stride + + tile.x as i32 * tile_size as i32 * bpp; + } + + descriptor.size = clipped_tile_size; + } + + // If we are uploading the dirty region of a blob image we might have several + // rects to upload so we use each of these rasterized rects rather than the + // overall dirty rect of the image. + if let Some(rect) = blob_rasterized_rect { + dirty_rect = DirtyRect::Partial(rect); + } + + let filter = match request.rendering { + ImageRendering::Pixelated => { + TextureFilter::Nearest + } + ImageRendering::Auto | ImageRendering::CrispEdges => { + // If the texture uses linear filtering, enable mipmaps and + // trilinear filtering, for better image quality. We only + // support this for now on textures that are not placed + // into the shared cache. This accounts for any image + // that is > 512 in either dimension, so it should cover + // the most important use cases. We may want to support + // mip-maps on shared cache items in the future. + if descriptor.allow_mipmaps() && + descriptor.size.width > 512 && + descriptor.size.height > 512 && + !self.texture_cache.is_allowed_in_shared_cache( + TextureFilter::Linear, + &descriptor, + ) { + TextureFilter::Trilinear + } else { + TextureFilter::Linear + } + } + }; + + let eviction = if image_template.data.is_blob() { + entry.manual_eviction = true; + Eviction::Manual + } else { + Eviction::Auto + }; + + //Note: at this point, the dirty rectangle is local to the descriptor space + self.texture_cache.update( + &mut entry.texture_cache_handle, + descriptor, + filter, + Some(image_data), + [0.0; 4], + dirty_rect, + gpu_cache, + None, + UvRectKind::Rect, + eviction, + TargetShader::Default, + ); + } + } + } + + pub fn create_compositor_backdrop_surface( + &mut self, + color: ColorF + ) -> NativeSurfaceId { + let id = NativeSurfaceId(NEXT_NATIVE_SURFACE_ID.fetch_add(1, Ordering::Relaxed) as u64); + + self.pending_native_surface_updates.push( + NativeSurfaceOperation { + details: NativeSurfaceOperationDetails::CreateBackdropSurface { + id, + color, + }, + } + ); + + id + } + + /// Queue up allocation of a new OS native compositor surface with the + /// specified tile size. + pub fn create_compositor_surface( + &mut self, + virtual_offset: DeviceIntPoint, + tile_size: DeviceIntSize, + is_opaque: bool, + ) -> NativeSurfaceId { + let id = NativeSurfaceId(NEXT_NATIVE_SURFACE_ID.fetch_add(1, Ordering::Relaxed) as u64); + + self.pending_native_surface_updates.push( + NativeSurfaceOperation { + details: NativeSurfaceOperationDetails::CreateSurface { + id, + virtual_offset, + tile_size, + is_opaque, + }, + } + ); + + id + } + + pub fn create_compositor_external_surface( + &mut self, + is_opaque: bool, + ) -> NativeSurfaceId { + let id = NativeSurfaceId(NEXT_NATIVE_SURFACE_ID.fetch_add(1, Ordering::Relaxed) as u64); + + self.pending_native_surface_updates.push( + NativeSurfaceOperation { + details: NativeSurfaceOperationDetails::CreateExternalSurface { + id, + is_opaque, + }, + } + ); + + id + } + + /// Queue up destruction of an existing native OS surface. This is used when + /// a picture cache surface is dropped or resized. + pub fn destroy_compositor_surface( + &mut self, + id: NativeSurfaceId, + ) { + self.pending_native_surface_updates.push( + NativeSurfaceOperation { + details: NativeSurfaceOperationDetails::DestroySurface { + id, + } + } + ); + } + + /// Queue construction of a native compositor tile on a given surface. + pub fn create_compositor_tile( + &mut self, + id: NativeTileId, + ) { + self.pending_native_surface_updates.push( + NativeSurfaceOperation { + details: NativeSurfaceOperationDetails::CreateTile { + id, + }, + } + ); + } + + /// Queue destruction of a native compositor tile. + pub fn destroy_compositor_tile( + &mut self, + id: NativeTileId, + ) { + self.pending_native_surface_updates.push( + NativeSurfaceOperation { + details: NativeSurfaceOperationDetails::DestroyTile { + id, + }, + } + ); + } + + pub fn attach_compositor_external_image( + &mut self, + id: NativeSurfaceId, + external_image: ExternalImageId, + ) { + self.pending_native_surface_updates.push( + NativeSurfaceOperation { + details: NativeSurfaceOperationDetails::AttachExternalImage { + id, + external_image, + }, + } + ); + } + + + pub fn end_frame(&mut self, profile: &mut TransactionProfile) { + debug_assert_eq!(self.state, State::QueryResources); + profile_scope!("end_frame"); + self.state = State::Idle; + + // GC the render target pool, if it's currently > 64 MB in size. + // + // We use a simple scheme whereby we drop any texture that hasn't been used + // in the last 60 frames, until we are below the size threshold. This should + // generally prevent any sustained build-up of unused textures, unless we don't + // generate frames for a long period. This can happen when the window is + // minimized, and we probably want to flush all the WebRender caches in that case [1]. + // There is also a second "red line" memory threshold which prevents + // memory exhaustion if many render targets are allocated within a small + // number of frames. For now this is set at 320 MB (10x the normal memory threshold). + // + // [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1494099 + self.gc_render_targets( + 64 * 1024 * 1024, + 32 * 1024 * 1024 * 10, + 60, + ); + + self.texture_cache.end_frame(profile); + self.picture_textures.gc( + &mut self.texture_cache.pending_updates, + ); + + self.picture_textures.update_profile(profile); + } + + pub fn set_debug_flags(&mut self, flags: DebugFlags) { + GLYPH_FLASHING.store(flags.contains(DebugFlags::GLYPH_FLASHING), std::sync::atomic::Ordering::Relaxed); + self.texture_cache.set_debug_flags(flags); + self.picture_textures.set_debug_flags(flags); + } + + pub fn clear(&mut self, what: ClearCache) { + if what.contains(ClearCache::IMAGES) { + for (_key, mut cached) in self.cached_images.resources.drain() { + cached.drop_from_cache(&mut self.texture_cache); + } + } + if what.contains(ClearCache::GLYPHS) { + self.cached_glyphs.clear(); + } + if what.contains(ClearCache::GLYPH_DIMENSIONS) { + self.cached_glyph_dimensions.clear(); + } + if what.contains(ClearCache::RENDER_TASKS) { + self.cached_render_tasks.clear(); + } + if what.contains(ClearCache::TEXTURE_CACHE) { + self.texture_cache.clear_all(); + self.picture_textures.clear(&mut self.texture_cache.pending_updates); + } + if what.contains(ClearCache::RENDER_TARGETS) { + self.clear_render_target_pool(); + } + } + + pub fn clear_namespace(&mut self, namespace: IdNamespace) { + self.clear_images(|k| k.0 == namespace); + + // First clear out any non-shared resources associated with the namespace. + self.resources.fonts.instances.clear_namespace(namespace); + let deleted_keys = self.resources.fonts.templates.clear_namespace(namespace); + self.glyph_rasterizer.delete_fonts(&deleted_keys); + self.cached_glyphs.clear_namespace(namespace); + if let Some(handler) = &mut self.blob_image_handler { + handler.clear_namespace(namespace); + } + + // Check for any shared instance keys that were remapped from the namespace. + let shared_instance_keys = self.resources.fonts.instance_keys.clear_namespace(namespace); + if !shared_instance_keys.is_empty() { + self.resources.fonts.instances.delete_font_instances(&shared_instance_keys); + self.cached_glyphs.delete_font_instances(&shared_instance_keys, &mut self.glyph_rasterizer); + // Blob font instances are not shared across namespaces, so there is no + // need to call the handler for them individually. + } + + // Finally check for any shared font keys that were remapped from the namespace. + let shared_keys = self.resources.fonts.font_keys.clear_namespace(namespace); + if !shared_keys.is_empty() { + self.glyph_rasterizer.delete_fonts(&shared_keys); + self.resources.fonts.templates.delete_fonts(&shared_keys); + self.cached_glyphs.delete_fonts(&shared_keys); + if let Some(handler) = &mut self.blob_image_handler { + for &key in &shared_keys { + handler.delete_font(key); + } + } + } + } + + /// Reports the CPU heap usage of this ResourceCache. + /// + /// NB: It would be much better to use the derive(MallocSizeOf) machinery + /// here, but the Arcs complicate things. The two ways to handle that would + /// be to either (a) Implement MallocSizeOf manually for the things that own + /// them and manually avoid double-counting, or (b) Use the "seen this pointer + /// yet" machinery from the proper malloc_size_of crate. We can do this if/when + /// more accurate memory reporting on these resources becomes a priority. + pub fn report_memory(&self, op: VoidPtrToSizeFn) -> MemoryReport { + let mut report = MemoryReport::default(); + + let mut seen_fonts = std::collections::HashSet::new(); + // Measure fonts. We only need the templates here, because the instances + // don't have big buffers. + for (_, font) in self.resources.fonts.templates.lock().iter() { + if let FontTemplate::Raw(ref raw, _) = font { + report.fonts += unsafe { op(raw.as_ptr() as *const c_void) }; + seen_fonts.insert(raw.as_ptr()); + } + } + + for font in self.resources.weak_fonts.iter() { + if !seen_fonts.contains(&font.as_ptr()) { + report.weak_fonts += unsafe { op(font.as_ptr() as *const c_void) }; + } + } + + // Measure images. + for (_, image) in self.resources.image_templates.images.iter() { + report.images += match image.data { + CachedImageData::Raw(ref v) => unsafe { op(v.as_ptr() as *const c_void) }, + CachedImageData::Blob | CachedImageData::External(..) => 0, + } + } + + // Mesure rasterized blobs. + // TODO(gw): Temporarily disabled while we roll back a crash. We can re-enable + // these when that crash is fixed. + /* + for (_, image) in self.rasterized_blob_images.iter() { + let mut accumulate = |b: &RasterizedBlobImage| { + report.rasterized_blobs += unsafe { op(b.data.as_ptr() as *const c_void) }; + }; + match image { + RasterizedBlob::Tiled(map) => map.values().for_each(&mut accumulate), + RasterizedBlob::NonTiled(vec) => vec.iter().for_each(&mut accumulate), + }; + } + */ + + report + } + + /// Properly deletes all images matching the predicate. + fn clear_images<F: Fn(&ImageKey) -> bool>(&mut self, f: F) { + let keys = self.resources.image_templates.images.keys().filter(|k| f(*k)) + .cloned().collect::<SmallVec<[ImageKey; 16]>>(); + + for key in keys { + self.delete_image_template(key); + } + + #[cfg(features="leak_checks")] + let check_leaks = true; + #[cfg(not(features="leak_checks"))] + let check_leaks = false; + + if check_leaks { + let blob_f = |key: &BlobImageKey| { f(&key.as_image()) }; + assert!(!self.resources.image_templates.images.keys().any(&f)); + assert!(!self.cached_images.resources.keys().any(&f)); + assert!(!self.rasterized_blob_images.keys().any(&blob_f)); + } + } + + /// Get a render target from the pool, or allocate a new one if none are + /// currently available that match the requested parameters. + pub fn get_or_create_render_target_from_pool( + &mut self, + size: DeviceIntSize, + format: ImageFormat, + ) -> CacheTextureId { + for target in &mut self.render_target_pool { + if target.size == size && + target.format == format && + !target.is_active { + // Found a target that's not currently in use which matches. Update + // the last_frame_used for GC purposes. + target.is_active = true; + target.last_frame_used = self.current_frame_id; + return target.texture_id; + } + } + + // Need to create a new render target and add it to the pool + + let texture_id = self.texture_cache.alloc_render_target( + size, + format, + ); + + self.render_target_pool.push(RenderTarget { + size, + format, + texture_id, + is_active: true, + last_frame_used: self.current_frame_id, + }); + + texture_id + } + + /// Return a render target to the pool. + pub fn return_render_target_to_pool( + &mut self, + id: CacheTextureId, + ) { + let target = self.render_target_pool + .iter_mut() + .find(|t| t.texture_id == id) + .expect("bug: invalid render target id"); + + assert!(target.is_active); + target.is_active = false; + } + + /// Clear all current render targets (e.g. on memory pressure) + fn clear_render_target_pool( + &mut self, + ) { + for target in self.render_target_pool.drain(..) { + debug_assert!(!target.is_active); + self.texture_cache.free_render_target(target.texture_id); + } + } + + /// Garbage collect and remove old render targets from the pool that haven't + /// been used for some time. + fn gc_render_targets( + &mut self, + total_bytes_threshold: usize, + total_bytes_red_line_threshold: usize, + frames_threshold: u64, + ) { + // Get the total GPU memory size used by the current render target pool + let mut rt_pool_size_in_bytes: usize = self.render_target_pool + .iter() + .map(|t| t.size_in_bytes()) + .sum(); + + // If the total size of the pool is less than the threshold, don't bother + // trying to GC any targets + if rt_pool_size_in_bytes <= total_bytes_threshold { + return; + } + + // Sort the current pool by age, so that we remove oldest textures first + self.render_target_pool.sort_by_key(|t| t.last_frame_used); + + // We can't just use retain() because `RenderTarget` requires manual cleanup. + let mut retained_targets = SmallVec::<[RenderTarget; 8]>::new(); + + for target in self.render_target_pool.drain(..) { + assert!(!target.is_active); + + // Drop oldest textures until we are under the allowed size threshold. + // However, if it's been used in very recently, it is always kept around, + // which ensures we don't thrash texture allocations on pages that do + // require a very large render target pool and are regularly changing. + let above_red_line = rt_pool_size_in_bytes > total_bytes_red_line_threshold; + let above_threshold = rt_pool_size_in_bytes > total_bytes_threshold; + let used_recently = target.used_recently(self.current_frame_id, frames_threshold); + let used_this_frame = target.last_frame_used == self.current_frame_id; + + if !used_this_frame && (above_red_line || (above_threshold && !used_recently)) { + rt_pool_size_in_bytes -= target.size_in_bytes(); + self.texture_cache.free_render_target(target.texture_id); + } else { + retained_targets.push(target); + } + } + + self.render_target_pool.extend(retained_targets); + } + + #[cfg(test)] + pub fn validate_surfaces( + &self, + expected_surfaces: &[(i32, i32, ImageFormat)], + ) { + assert_eq!(expected_surfaces.len(), self.render_target_pool.len()); + + for (expected, surface) in expected_surfaces.iter().zip(self.render_target_pool.iter()) { + assert_eq!(DeviceIntSize::new(expected.0, expected.1), surface.size); + assert_eq!(expected.2, surface.format); + } + } +} + +impl Drop for ResourceCache { + fn drop(&mut self) { + self.clear_images(|_| true); + } +} + +#[cfg(any(feature = "capture", feature = "replay"))] +#[cfg_attr(feature = "capture", derive(Serialize))] +#[cfg_attr(feature = "replay", derive(Deserialize))] +struct PlainFontTemplate { + data: String, + index: u32, +} + +#[cfg(any(feature = "capture", feature = "replay"))] +#[cfg_attr(feature = "capture", derive(Serialize))] +#[cfg_attr(feature = "replay", derive(Deserialize))] +struct PlainImageTemplate { + data: String, + descriptor: ImageDescriptor, + tiling: Option<TileSize>, + generation: ImageGeneration, +} + +#[cfg(any(feature = "capture", feature = "replay"))] +#[cfg_attr(feature = "capture", derive(Serialize))] +#[cfg_attr(feature = "replay", derive(Deserialize))] +pub struct PlainResources { + font_templates: FastHashMap<FontKey, PlainFontTemplate>, + font_instances: Vec<BaseFontInstance>, + image_templates: FastHashMap<ImageKey, PlainImageTemplate>, +} + +#[cfg(feature = "capture")] +#[derive(Serialize)] +pub struct PlainCacheRef<'a> { + current_frame_id: FrameId, + glyphs: &'a GlyphCache, + glyph_dimensions: &'a GlyphDimensionsCache, + images: &'a ImageCache, + render_tasks: &'a RenderTaskCache, + textures: &'a TextureCache, + picture_textures: &'a PictureTextures, +} + +#[cfg(feature = "replay")] +#[derive(Deserialize)] +pub struct PlainCacheOwn { + current_frame_id: FrameId, + glyphs: GlyphCache, + glyph_dimensions: GlyphDimensionsCache, + images: ImageCache, + render_tasks: RenderTaskCache, + textures: TextureCache, + picture_textures: PictureTextures, +} + +#[cfg(feature = "replay")] +const NATIVE_FONT: &'static [u8] = include_bytes!("../res/Proggy.ttf"); + +// This currently only casts the unit but will soon apply an offset +fn to_image_dirty_rect(blob_dirty_rect: &BlobDirtyRect) -> ImageDirtyRect { + match *blob_dirty_rect { + DirtyRect::Partial(rect) => DirtyRect::Partial(rect.cast_unit()), + DirtyRect::All => DirtyRect::All, + } +} + +impl ResourceCache { + #[cfg(feature = "capture")] + pub fn save_capture( + &mut self, root: &PathBuf + ) -> (PlainResources, Vec<ExternalCaptureImage>) { + use std::fs; + use std::io::Write; + + info!("saving resource cache"); + let res = &self.resources; + let path_fonts = root.join("fonts"); + if !path_fonts.is_dir() { + fs::create_dir(&path_fonts).unwrap(); + } + let path_images = root.join("images"); + if !path_images.is_dir() { + fs::create_dir(&path_images).unwrap(); + } + let path_blobs = root.join("blobs"); + if !path_blobs.is_dir() { + fs::create_dir(&path_blobs).unwrap(); + } + let path_externals = root.join("externals"); + if !path_externals.is_dir() { + fs::create_dir(&path_externals).unwrap(); + } + + info!("\tfont templates"); + let mut font_paths = FastHashMap::default(); + for template in res.fonts.templates.lock().values() { + let data: &[u8] = match *template { + FontTemplate::Raw(ref arc, _) => arc, + FontTemplate::Native(_) => continue, + }; + let font_id = res.fonts.templates.len() + 1; + let entry = match font_paths.entry(data.as_ptr()) { + Entry::Occupied(_) => continue, + Entry::Vacant(e) => e, + }; + let file_name = format!("{}.raw", font_id); + let short_path = format!("fonts/{}", file_name); + fs::File::create(path_fonts.join(file_name)) + .expect(&format!("Unable to create {}", short_path)) + .write_all(data) + .unwrap(); + entry.insert(short_path); + } + + info!("\timage templates"); + let mut image_paths = FastHashMap::default(); + let mut other_paths = FastHashMap::default(); + let mut num_blobs = 0; + let mut external_images = Vec::new(); + for (&key, template) in res.image_templates.images.iter() { + let desc = &template.descriptor; + match template.data { + CachedImageData::Raw(ref arc) => { + let image_id = image_paths.len() + 1; + let entry = match image_paths.entry(arc.as_ptr()) { + Entry::Occupied(_) => continue, + Entry::Vacant(e) => e, + }; + + #[cfg(feature = "png")] + CaptureConfig::save_png( + root.join(format!("images/{}.png", image_id)), + desc.size, + desc.format, + desc.stride, + &arc, + ); + let file_name = format!("{}.raw", image_id); + let short_path = format!("images/{}", file_name); + fs::File::create(path_images.join(file_name)) + .expect(&format!("Unable to create {}", short_path)) + .write_all(&*arc) + .unwrap(); + entry.insert(short_path); + } + CachedImageData::Blob => { + warn!("Tiled blob images aren't supported yet"); + let result = RasterizedBlobImage { + rasterized_rect: desc.size.into(), + data: Arc::new(vec![0; desc.compute_total_size() as usize]) + }; + + assert_eq!(result.rasterized_rect.size(), desc.size); + assert_eq!(result.data.len(), desc.compute_total_size() as usize); + + num_blobs += 1; + #[cfg(feature = "png")] + CaptureConfig::save_png( + root.join(format!("blobs/{}.png", num_blobs)), + desc.size, + desc.format, + desc.stride, + &result.data, + ); + let file_name = format!("{}.raw", num_blobs); + let short_path = format!("blobs/{}", file_name); + let full_path = path_blobs.clone().join(&file_name); + fs::File::create(full_path) + .expect(&format!("Unable to create {}", short_path)) + .write_all(&result.data) + .unwrap(); + other_paths.insert(key, short_path); + } + CachedImageData::External(ref ext) => { + let short_path = format!("externals/{}", external_images.len() + 1); + other_paths.insert(key, short_path.clone()); + external_images.push(ExternalCaptureImage { + short_path, + descriptor: desc.clone(), + external: ext.clone(), + }); + } + } + } + + let mut font_templates = FastHashMap::default(); + let mut font_remap = FastHashMap::default(); + // Generate a map from duplicate font keys to their template. + for key in res.fonts.font_keys.keys() { + let shared_key = res.fonts.font_keys.map_key(&key); + let template = match res.fonts.templates.get_font(&shared_key) { + Some(template) => template, + None => { + debug!("Failed serializing font template {:?}", key); + continue; + } + }; + let plain_font = match template { + FontTemplate::Raw(arc, index) => { + PlainFontTemplate { + data: font_paths[&arc.as_ptr()].clone(), + index, + } + } + #[cfg(not(target_os = "macos"))] + FontTemplate::Native(native) => { + PlainFontTemplate { + data: native.path.to_string_lossy().to_string(), + index: native.index, + } + } + #[cfg(target_os = "macos")] + FontTemplate::Native(native) => { + PlainFontTemplate { + data: native.name, + index: 0, + } + } + }; + font_templates.insert(key, plain_font); + // Generate a reverse map from a shared key to a representive key. + font_remap.insert(shared_key, key); + } + let mut font_instances = Vec::new(); + // Build a list of duplicate instance keys. + for instance_key in res.fonts.instance_keys.keys() { + let shared_key = res.fonts.instance_keys.map_key(&instance_key); + let instance = match res.fonts.instances.get_font_instance(shared_key) { + Some(instance) => instance, + None => { + debug!("Failed serializing font instance {:?}", instance_key); + continue; + } + }; + // Target the instance towards a representive duplicate font key. The font key will be + // de-duplicated on load to an appropriate shared key. + font_instances.push(BaseFontInstance { + font_key: font_remap.get(&instance.font_key).cloned().unwrap_or(instance.font_key), + instance_key, + ..(*instance).clone() + }); + } + let resources = PlainResources { + font_templates, + font_instances, + image_templates: res.image_templates.images + .iter() + .map(|(key, template)| { + (*key, PlainImageTemplate { + data: match template.data { + CachedImageData::Raw(ref arc) => image_paths[&arc.as_ptr()].clone(), + _ => other_paths[key].clone(), + }, + descriptor: template.descriptor.clone(), + tiling: template.tiling, + generation: template.generation, + }) + }) + .collect(), + }; + + (resources, external_images) + } + + #[cfg(feature = "capture")] + pub fn save_caches(&self, _root: &PathBuf) -> PlainCacheRef { + PlainCacheRef { + current_frame_id: self.current_frame_id, + glyphs: &self.cached_glyphs, + glyph_dimensions: &self.cached_glyph_dimensions, + images: &self.cached_images, + render_tasks: &self.cached_render_tasks, + textures: &self.texture_cache, + picture_textures: &self.picture_textures, + } + } + + #[cfg(feature = "replay")] + pub fn load_capture( + &mut self, + resources: PlainResources, + caches: Option<PlainCacheOwn>, + config: &CaptureConfig, + ) -> Vec<PlainExternalImage> { + use std::{fs, path::Path}; + use crate::texture_cache::TextureCacheConfig; + + info!("loading resource cache"); + //TODO: instead of filling the local path to Arc<data> map as we process + // each of the resource types, we could go through all of the local paths + // and fill out the map as the first step. + let mut raw_map = FastHashMap::<String, Arc<Vec<u8>>>::default(); + + self.clear(ClearCache::all()); + self.clear_images(|_| true); + + match caches { + Some(cached) => { + self.current_frame_id = cached.current_frame_id; + self.cached_glyphs = cached.glyphs; + self.cached_glyph_dimensions = cached.glyph_dimensions; + self.cached_images = cached.images; + self.cached_render_tasks = cached.render_tasks; + self.texture_cache = cached.textures; + self.picture_textures = cached.picture_textures; + } + None => { + self.current_frame_id = FrameId::INVALID; + self.texture_cache = TextureCache::new( + self.texture_cache.max_texture_size(), + self.texture_cache.tiling_threshold(), + self.texture_cache.color_formats(), + self.texture_cache.swizzle_settings(), + &TextureCacheConfig::DEFAULT, + ); + self.picture_textures = PictureTextures::new( + self.picture_textures.default_tile_size(), + self.picture_textures.filter(), + ); + } + } + + self.glyph_rasterizer.reset(); + let res = &mut self.resources; + res.fonts.templates.clear(); + res.fonts.instances.clear(); + res.image_templates.images.clear(); + + info!("\tfont templates..."); + let root = config.resource_root(); + let native_font_replacement = Arc::new(NATIVE_FONT.to_vec()); + for (key, plain_template) in resources.font_templates { + let arc = match raw_map.entry(plain_template.data) { + Entry::Occupied(e) => { + e.get().clone() + } + Entry::Vacant(e) => { + let file_path = if Path::new(e.key()).is_absolute() { + PathBuf::from(e.key()) + } else { + root.join(e.key()) + }; + let arc = match fs::read(file_path) { + Ok(buffer) => Arc::new(buffer), + Err(err) => { + error!("Unable to open font template {:?}: {:?}", e.key(), err); + Arc::clone(&native_font_replacement) + } + }; + e.insert(arc).clone() + } + }; + + let template = FontTemplate::Raw(arc, plain_template.index); + // Only add the template if this is the first time it has been seen. + if let Some(shared_key) = res.fonts.font_keys.add_key(&key, &template) { + self.glyph_rasterizer.add_font(shared_key, template.clone()); + res.fonts.templates.add_font(shared_key, template); + } + } + + info!("\tfont instances..."); + for instance in resources.font_instances { + // Target the instance to a shared font key. + let base = BaseFontInstance { + font_key: res.fonts.font_keys.map_key(&instance.font_key), + ..instance + }; + if let Some(shared_instance) = res.fonts.instance_keys.add_key(base) { + res.fonts.instances.add_font_instance(shared_instance); + } + } + + info!("\timage templates..."); + let mut external_images = Vec::new(); + for (key, template) in resources.image_templates { + let data = match config.deserialize_for_resource::<PlainExternalImage, _>(&template.data) { + Some(plain) => { + let ext_data = plain.external; + external_images.push(plain); + CachedImageData::External(ext_data) + } + None => { + let arc = match raw_map.entry(template.data) { + Entry::Occupied(e) => { + e.get().clone() + } + Entry::Vacant(e) => { + let buffer = fs::read(root.join(e.key())) + .expect(&format!("Unable to open {}", e.key())); + e.insert(Arc::new(buffer)) + .clone() + } + }; + CachedImageData::Raw(arc) + } + }; + + res.image_templates.images.insert(key, ImageResource { + data, + descriptor: template.descriptor, + tiling: template.tiling, + visible_rect: template.descriptor.size.into(), + generation: template.generation, + }); + } + + external_images + } + + #[cfg(feature = "capture")] + pub fn save_capture_sequence(&mut self, config: &mut CaptureConfig) -> Vec<ExternalCaptureImage> { + if self.capture_dirty { + self.capture_dirty = false; + config.prepare_resource(); + let (resources, deferred) = self.save_capture(&config.resource_root()); + config.serialize_for_resource(&resources, "plain-resources.ron"); + deferred + } else { + Vec::new() + } + } +} |