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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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20
components/script/dom/paintrenderingcontext2d.rs
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@ -11,7 +11,7 @@ use dom::bindings::codegen::Bindings::CanvasRenderingContext2DBinding::CanvasLin
use dom::bindings::codegen::Bindings::CanvasRenderingContext2DBinding::CanvasRenderingContext2DMethods;
use dom::bindings::codegen::Bindings::PaintRenderingContext2DBinding;
use dom::bindings::codegen::Bindings::PaintRenderingContext2DBinding::PaintRenderingContext2DMethods;
use dom::bindings::codegen::UnionTypes::HTMLImageElementOrHTMLCanvasElementOrCanvasRenderingContext2D;
use dom::bindings::codegen::UnionTypes::HTMLImageElementOrHTMLCanvasElementOrCanvasRenderingContext2DOrCSSStyleValue;
use dom::bindings::codegen::UnionTypes::StringOrCanvasGradientOrCanvasPattern;
use dom::bindings::error::ErrorResult;
use dom::bindings::error::Fallible;
@ -24,11 +24,13 @@ use dom::canvasgradient::CanvasGradient;
use dom::canvaspattern::CanvasPattern;
use dom::canvasrenderingcontext2d::CanvasRenderingContext2D;
use dom::paintworkletglobalscope::PaintWorkletGlobalScope;
use dom::workletglobalscope::WorkletGlobalScope;
use dom_struct::dom_struct;
use euclid::ScaleFactor;
use euclid::Size2D;
use euclid::TypedSize2D;
use ipc_channel::ipc::IpcSender;
use servo_url::ServoUrl;
use std::cell::Cell;
use style_traits::CSSPixel;
use style_traits::DevicePixel;
@ -42,8 +44,10 @@ pub struct PaintRenderingContext2D {
impl PaintRenderingContext2D {
fn new_inherited(global: &PaintWorkletGlobalScope) -> PaintRenderingContext2D {
let size = Size2D::zero();
let image_cache = global.image_cache();
let base_url = global.upcast::<WorkletGlobalScope>().base_url();
PaintRenderingContext2D {
context: CanvasRenderingContext2D::new_inherited(global.upcast(), None, size),
context: CanvasRenderingContext2D::new_inherited(global.upcast(), None, image_cache, base_url, size),
device_pixel_ratio: Cell::new(ScaleFactor::new(1.0)),
}
}
@ -59,6 +63,10 @@ impl PaintRenderingContext2D {
let _ = self.context.ipc_renderer().send(msg);
}
pub fn take_missing_image_urls(&self) -> Vec<ServoUrl> {
self.context.take_missing_image_urls()
}
pub fn set_bitmap_dimensions(&self,
size: TypedSize2D<f32, CSSPixel>,
device_pixel_ratio: ScaleFactor<f32, CSSPixel, DevicePixel>)
@ -187,7 +195,7 @@ impl PaintRenderingContext2DMethods for PaintRenderingContext2D {
// https://html.spec.whatwg.org/multipage/#dom-context-2d-drawimage
fn DrawImage(&self,
image: HTMLImageElementOrHTMLCanvasElementOrCanvasRenderingContext2D,
image: HTMLImageElementOrHTMLCanvasElementOrCanvasRenderingContext2DOrCSSStyleValue,
dx: f64,
dy: f64)
-> ErrorResult {
@ -196,7 +204,7 @@ impl PaintRenderingContext2DMethods for PaintRenderingContext2D {
// https://html.spec.whatwg.org/multipage/#dom-context-2d-drawimage
fn DrawImage_(&self,
image: HTMLImageElementOrHTMLCanvasElementOrCanvasRenderingContext2D,
image: HTMLImageElementOrHTMLCanvasElementOrCanvasRenderingContext2DOrCSSStyleValue,
dx: f64,
dy: f64,
dw: f64,
@ -207,7 +215,7 @@ impl PaintRenderingContext2DMethods for PaintRenderingContext2D {
// https://html.spec.whatwg.org/multipage/#dom-context-2d-drawimage
fn DrawImage__(&self,
image: HTMLImageElementOrHTMLCanvasElementOrCanvasRenderingContext2D,
image: HTMLImageElementOrHTMLCanvasElementOrCanvasRenderingContext2DOrCSSStyleValue,
sx: f64,
sy: f64,
sw: f64,
@ -309,7 +317,7 @@ impl PaintRenderingContext2DMethods for PaintRenderingContext2D {
// https://html.spec.whatwg.org/multipage/#dom-context-2d-createpattern
fn CreatePattern(&self,
image: HTMLImageElementOrHTMLCanvasElementOrCanvasRenderingContext2D,
image: HTMLImageElementOrHTMLCanvasElementOrCanvasRenderingContext2DOrCSSStyleValue,
repetition: DOMString)
-> Fallible<Root<CanvasPattern>> {
self.context.CreatePattern(image, repetition)