Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 305 insertions, 0 deletions

diff --git a/gfx/wr/webrender/src/api_resources.rs b/gfx/wr/webrender/src/api_resources.rs
new file mode 100644
index 0000000000..d0cece19f5
--- /dev/null
+++ b/gfx/wr/webrender/src/api_resources.rs
@@ -0,0 +1,305 @@
+/* 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 crate::api::{BlobImageKey, ImageDescriptor, DirtyRect, TileSize, DebugFlags};
+use crate::api::{BlobImageHandler, AsyncBlobImageRasterizer, BlobImageData, BlobImageParams};
+use crate::api::{BlobImageRequest, BlobImageDescriptor, FontTemplate};
+use crate::api::units::*;
+use glyph_rasterizer::{SharedFontResources, BaseFontInstance};
+use crate::render_api::{ResourceUpdate, TransactionMsg, AddFont};
+use crate::image_tiling::*;
+use crate::profiler;
+
+use std::collections::HashMap;
+use std::mem;
+use std::sync::Arc;
+
+/// We use this to generate the async blob rendering requests.
+struct BlobImageTemplate {
+    descriptor: ImageDescriptor,
+    tile_size: TileSize,
+    dirty_rect: BlobDirtyRect,
+    /// See ImageResource::visible_rect.
+    visible_rect: DeviceIntRect,
+    // If the active rect of the blob changes, this represents the
+    // range of tiles that remain valid. This must be taken into
+    // account in addition to the valid rect when submitting blob
+    // rasterization requests.
+    // `None` means the bounds have not changed (tiles are still valid).
+    // `Some(TileRange::zero())` means all of the tiles are invalid.
+    valid_tiles_after_bounds_change: Option<TileRange>,
+}
+
+pub struct ApiResources {
+    blob_image_templates: HashMap<BlobImageKey, BlobImageTemplate>,
+    pub blob_image_handler: Option<Box<dyn BlobImageHandler>>,
+    fonts: SharedFontResources,
+    // This should only be true for CI or debugging purposes. If true,
+    // we'll restrict the size of blob images as a result effectively
+    // rendering them incorrectly.
+    debug_restrict_blob_size: bool,
+}
+
+impl ApiResources {
+    pub fn new(
+        blob_image_handler: Option<Box<dyn BlobImageHandler>>,
+        fonts: SharedFontResources,
+    ) -> Self {
+        ApiResources {
+            blob_image_templates: HashMap::new(),
+            blob_image_handler,
+            fonts,
+            debug_restrict_blob_size: false,
+        }
+    }
+
+    pub fn get_fonts(&self) -> SharedFontResources {
+        self.fonts.clone()
+    }
+
+    pub fn set_debug_flags(&mut self, flags: DebugFlags) {
+        self.debug_restrict_blob_size = flags.contains(DebugFlags::RESTRICT_BLOB_SIZE);
+    }
+
+    pub fn adjust_blob_visible_rect(&self, rect: &mut DeviceIntRect, size: Option<&mut DeviceIntSize>) {
+        if self.debug_restrict_blob_size {
+            rect.max.x = rect.max.x.min(rect.min.x + 2048);
+            rect.max.y = rect.max.y.min(rect.min.y + 2048);
+            if let Some(size) = size {
+                size.width = size.width.min(2048);
+                size.height = size.height.min(2048);
+            }
+        }
+    }
+
+    pub fn update(&mut self, transaction: &mut TransactionMsg) {
+        let mut blobs_to_rasterize = Vec::new();
+        for update in &mut transaction.resource_updates {
+            match *update {
+                ResourceUpdate::AddBlobImage(ref mut img) => {
+                    self.adjust_blob_visible_rect(&mut img.visible_rect, Some(&mut img.descriptor.size));
+                    self.blob_image_handler
+                        .as_mut()
+                        .expect("no blob image handler")
+                        .add(img.key, Arc::clone(&img.data), &img.visible_rect, img.tile_size);
+
+                    self.blob_image_templates.insert(
+                        img.key,
+                        BlobImageTemplate {
+                            descriptor: img.descriptor,
+                            tile_size: img.tile_size,
+                            dirty_rect: DirtyRect::All,
+                            valid_tiles_after_bounds_change: None,
+                            visible_rect: img.visible_rect,
+                        },
+                    );
+                    blobs_to_rasterize.push(img.key);
+                }
+                ResourceUpdate::UpdateBlobImage(ref mut img) => {
+                    debug_assert_eq!(img.visible_rect.size(), img.descriptor.size);
+                    self.adjust_blob_visible_rect(&mut img.visible_rect, Some(&mut img.descriptor.size));
+                    self.update_blob_image(
+                        img.key,
+                        Some(&img.descriptor),
+                        Some(&img.dirty_rect),
+                        Some(Arc::clone(&img.data)),
+                        &img.visible_rect,
+                    );
+                    blobs_to_rasterize.push(img.key);
+                }
+                ResourceUpdate::DeleteBlobImage(key) => {
+                    transaction.use_scene_builder_thread = true;
+                    self.blob_image_templates.remove(&key);
+                    if let Some(ref mut handler) = self.blob_image_handler {
+                        handler.delete(key);
+                    }
+                }
+                ResourceUpdate::SetBlobImageVisibleArea(ref key, ref mut area) => {
+                    self.adjust_blob_visible_rect(area, None);
+                    self.update_blob_image(*key, None, None, None, &area);
+                    blobs_to_rasterize.push(*key);
+                }
+                ResourceUpdate::AddFont(ref font) => {
+                    let (key, template) = match font {
+                        AddFont::Raw(key, bytes, index) => {
+                            (key, FontTemplate::Raw(Arc::clone(bytes), *index))
+                        }
+                        AddFont::Native(key, native_font_handle) => {
+                            (key, FontTemplate::Native(native_font_handle.clone()))
+                        }
+                    };
+                    if let Some(shared_key) = self.fonts.font_keys.add_key(key, &template) {
+                        self.fonts.templates.add_font(shared_key, template);
+                    }
+                }
+                ResourceUpdate::AddFontInstance(ref mut instance) => {
+                    let shared_font_key = self.fonts.font_keys.map_key(&instance.font_key);
+                    assert!(self.fonts.templates.has_font(&shared_font_key));
+                    // AddFontInstance will only be processed here, not in the resource cache, so it
+                    // is safe to take the options rather than clone them.
+                    let base = BaseFontInstance::new(
+                        instance.key,
+                        shared_font_key,
+                        instance.glyph_size,
+                        mem::take(&mut instance.options),
+                        mem::take(&mut instance.platform_options),
+                        mem::take(&mut instance.variations),
+                    );
+                    if let Some(shared_instance) = self.fonts.instance_keys.add_key(base) {
+                        self.fonts.instances.add_font_instance(shared_instance);
+                    }
+                }
+                ResourceUpdate::DeleteFont(_key) => {
+                    transaction.use_scene_builder_thread = true;
+                }
+                ResourceUpdate::DeleteFontInstance(_key) => {
+                    transaction.use_scene_builder_thread = true;
+                    // We will delete from the shared font instance map in the resource cache
+                    // after scene swap.
+                }
+                ResourceUpdate::DeleteImage(..) => {
+                    transaction.use_scene_builder_thread = true;
+                }
+                _ => {}
+            }
+        }
+
+        let (rasterizer, requests) = self.create_blob_scene_builder_requests(&blobs_to_rasterize);
+        transaction.profile.set(profiler::RASTERIZED_BLOBS, blobs_to_rasterize.len());
+        transaction.profile.set(profiler::RASTERIZED_BLOB_TILES, requests.len());
+        transaction.use_scene_builder_thread |= !requests.is_empty();
+        transaction.use_scene_builder_thread |= !transaction.scene_ops.is_empty();
+        transaction.blob_rasterizer = rasterizer;
+        transaction.blob_requests = requests;
+    }
+
+    pub fn enable_multithreading(&mut self, enable: bool) {
+        if let Some(ref mut handler) = self.blob_image_handler {
+            handler.enable_multithreading(enable);
+        }
+    }
+
+    fn update_blob_image(
+        &mut self,
+        key: BlobImageKey,
+        descriptor: Option<&ImageDescriptor>,
+        dirty_rect: Option<&BlobDirtyRect>,
+        data: Option<Arc<BlobImageData>>,
+        visible_rect: &DeviceIntRect,
+    ) {
+        if let Some(data) = data {
+            let dirty_rect = dirty_rect.expect("no dirty rect");
+            self.blob_image_handler
+                .as_mut()
+                .expect("no blob image handler")
+                .update(key, data, visible_rect, dirty_rect);
+        }
+
+        let image = self.blob_image_templates
+            .get_mut(&key)
+            .expect("Attempt to update non-existent blob image");
+
+        let mut valid_tiles_after_bounds_change = compute_valid_tiles_if_bounds_change(
+            &image.visible_rect,
+            visible_rect,
+            image.tile_size,
+        );
+
+        match (image.valid_tiles_after_bounds_change, valid_tiles_after_bounds_change) {
+            (Some(old), Some(ref mut new)) => {
+                *new = new.intersection(&old).unwrap_or_else(TileRange::zero);
+            }
+            (Some(old), None) => {
+                valid_tiles_after_bounds_change = Some(old);
+            }
+            _ => {}
+        }
+
+        let blob_size = visible_rect.size();
+
+        if let Some(descriptor) = descriptor {
+            image.descriptor = *descriptor;
+        } else {
+            // make sure the descriptor size matches the visible rect.
+            // This might not be necessary but let's stay on the safe side.
+            image.descriptor.size = blob_size;
+        }
+
+        if let Some(dirty_rect) = dirty_rect {
+            image.dirty_rect = image.dirty_rect.union(dirty_rect);
+        }
+
+        image.valid_tiles_after_bounds_change = valid_tiles_after_bounds_change;
+        image.visible_rect = *visible_rect;
+    }
+
+    pub fn create_blob_scene_builder_requests(
+        &mut self,
+        keys: &[BlobImageKey]
+    ) -> (Option<Box<dyn AsyncBlobImageRasterizer>>, Vec<BlobImageParams>) {
+        if self.blob_image_handler.is_none() || keys.is_empty() {
+            return (None, Vec::new());
+        }
+
+        let mut blob_request_params = Vec::new();
+        for key in keys {
+            let template = self.blob_image_templates.get_mut(key)
+                .expect("no blob image template");
+
+            // If we know that only a portion of the blob image is in the viewport,
+            // only request these visible tiles since blob images can be huge.
+            let tiles = compute_tile_range(
+                &template.visible_rect,
+                template.tile_size,
+            );
+
+            // Don't request tiles that weren't invalidated.
+            let dirty_tiles = match template.dirty_rect {
+                DirtyRect::Partial(dirty_rect) => {
+                    compute_tile_range(
+                        &dirty_rect.cast_unit(),
+                        template.tile_size,
+                    )
+                }
+                DirtyRect::All => tiles,
+            };
+
+            for_each_tile_in_range(&tiles, |tile| {
+                let still_valid = template.valid_tiles_after_bounds_change
+                    .map(|valid_tiles| valid_tiles.contains(tile))
+                    .unwrap_or(true);
+
+                if still_valid && !dirty_tiles.contains(tile) {
+                    return;
+                }
+
+                let descriptor = BlobImageDescriptor {
+                    rect: compute_tile_rect(
+                        &template.visible_rect,
+                        template.tile_size,
+                        tile,
+                    ).cast_unit(),
+                    format: template.descriptor.format,
+                };
+
+                assert!(descriptor.rect.width() > 0 && descriptor.rect.height() > 0);
+                blob_request_params.push(
+                    BlobImageParams {
+                        request: BlobImageRequest { key: *key, tile },
+                        descriptor,
+                        dirty_rect: DirtyRect::All,
+                    }
+                );
+            });
+
+            template.dirty_rect = DirtyRect::empty();
+            template.valid_tiles_after_bounds_change = None;
+        }
+
+        let handler = self.blob_image_handler.as_mut()
+            .expect("no blob image handler");
+        handler.prepare_resources(&self.fonts, &blob_request_params);
+        (Some(handler.create_blob_rasterizer()), blob_request_params)
+    }
+}