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Implement drawing an image from a CSS style value into a canvas.

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This commit is contained in:
Alan Jeffrey 2017-07-05 15:18:08 -05:00
parent 992c647f76
commit 2318caf002
8 changed files with 232 additions and 125 deletions
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22
components/script_traits/lib.rs
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@ -39,7 +39,6 @@ mod script_msg;
pub mod webdriver_msg;
use bluetooth_traits::BluetoothRequest;
use canvas_traits::CanvasData;
use devtools_traits::{DevtoolScriptControlMsg, ScriptToDevtoolsControlMsg, WorkerId};
use euclid::{Size2D, Length, Point2D, Vector2D, Rect, ScaleFactor, TypedSize2D};
use gfx_traits::Epoch;
@ -52,6 +51,7 @@ use msg::constellation_msg::{BrowsingContextId, TopLevelBrowsingContextId, Frame
use msg::constellation_msg::{PipelineId, PipelineNamespaceId, TraversalDirection};
use net_traits::{FetchResponseMsg, ReferrerPolicy, ResourceThreads};
use net_traits::image::base::Image;
use net_traits::image::base::PixelFormat;
use net_traits::image_cache::ImageCache;
use net_traits::response::HttpsState;
use net_traits::storage_thread::StorageType;
@ -69,6 +69,7 @@ use style_traits::CSSPixel;
use style_traits::DevicePixel;
use webdriver_msg::{LoadStatus, WebDriverScriptCommand};
use webrender_api::ClipId;
use webrender_api::ImageKey;
use webvr_traits::{WebVREvent, WebVRMsg};
pub use script_msg::{LayoutMsg, ScriptMsg, EventResult, LogEntry};
@ -823,7 +824,22 @@ pub trait Painter: Sync + Send {
fn draw_a_paint_image(&self,
size: TypedSize2D<f32, CSSPixel>,
zoom: ScaleFactor<f32, CSSPixel, DevicePixel>,
properties: Vec<(Atom, String)>,
sender: IpcSender<CanvasData>);
properties: Vec<(Atom, String)>)
-> DrawAPaintImageResult;
}
/// The result of executing paint code: the image together with any image URLs that need to be loaded.
/// TODO: this should return a WR display list. https://github.com/servo/servo/issues/17497
#[derive(Debug, Deserialize, Serialize, Clone)]
pub struct DrawAPaintImageResult {
/// The image height
pub width: u32,
/// The image width
pub height: u32,
/// The image format
pub format: PixelFormat,
/// The image drawn, or None if an invalid paint image was drawn
pub image_key: Option<ImageKey>,
/// Drawing the image might have requested loading some image URLs.
pub missing_image_urls: Vec<ServoUrl>,
}