From 1109132f09d75da9a28b649c7677bb6ce07c40c0 Mon Sep 17 00:00:00 2001 From: Peter Bengtsson Date: Tue, 8 Dec 2020 14:41:45 -0500 Subject: initial commit --- .../imagesmoothingenabled/index.html | 181 +++++++++ .../el/web/api/canvasrenderingcontext2d/index.html | 448 +++++++++++++++++++++ 2 files changed, 629 insertions(+) create mode 100644 files/el/web/api/canvasrenderingcontext2d/imagesmoothingenabled/index.html create mode 100644 files/el/web/api/canvasrenderingcontext2d/index.html (limited to 'files/el/web/api/canvasrenderingcontext2d') diff --git a/files/el/web/api/canvasrenderingcontext2d/imagesmoothingenabled/index.html b/files/el/web/api/canvasrenderingcontext2d/imagesmoothingenabled/index.html new file mode 100644 index 0000000000..f4d86f8c60 --- /dev/null +++ b/files/el/web/api/canvasrenderingcontext2d/imagesmoothingenabled/index.html @@ -0,0 +1,181 @@ +--- +title: CanvasRenderingContext2D.imageSmoothingEnabled +slug: Web/API/CanvasRenderingContext2D/imageSmoothingEnabled +translation_of: Web/API/CanvasRenderingContext2D/imageSmoothingEnabled +--- +
{{APIRef}} {{SeeCompatTable}}
+ +

Η ιδιότητα CanvasRenderingContext2D.imageSmoothingEnabled του Canvas 2D API μπορεί να καθοριστεί για να αλλάξει αν οι εικόνες θα είναι λείες (true, προεπιλογή) ή όχι (false). Όταν ζητηθεί η ιδιότητα imageSmoothingEnabled, επιστρέφει την τελευταία τιμή που καθορίστικε.

+ +

Αυτή η ιδιότητα είναι χρήσημη για παιχνίδια με θέμα pixel-art, όταν ο καμβάς κλιμακώνεται για παράδειγμα. Ο προεπιλεγμένος αλγόριθμος κλιμάκωσης μπορεί να δημιουργίσει θολά εφέ, και να καταστρέψει τα εικονοστοιχεία. Σε αυτή την περίπτωση ορίστε αυτή την ιδιότητα σε false. Δείτε επίσης την ιδιότητα CSS {{cssxref("image-rendering")}}.

+ +

Σύνταξη

+ +
ctx.imageSmoothingEnabled = value;
+ +

Επιλογές

+ +
+
value
+
Ένα {{jsxref("Boolean")}} που δείχνωντας αν θα είναι λείες οι εικόνες ή όχι.
+
+ +

Παραδείγματα

+ +

Χρησιμοποιώντας την ιδιότητα imageSmoothingEnabled

+ +

Αυτό είναι ένα απλό απόσπασμα κώδικα που χρησιμοποιά την ιδιότητα imageSmoothingEnabled με μία κλιμακωμένη εικόνα.

+ +

HTML

+ +
<canvas id="canvas"></canvas>
+
+ +

JavaScript

+ +
var canvas = document.getElementById('canvas');
+var ctx = canvas.getContext('2d');
+
+var img = new Image();
+img.src = 'https://mdn.mozillademos.org/files/222/Canvas_createpattern.png';
+img.onload = function() {
+ ctx.mozImageSmoothingEnabled = false;
+ ctx.webkitImageSmoothingEnabled = false;
+ ctx.msImageSmoothingEnabled = false;
+ ctx.imageSmoothingEnabled = false;
+ ctx.drawImage(img, 0, 0, 400, 200);
+};
+
+ +

Επεξεργάστε τον παρακάτω κώδικα και δείτε ζωντανά τις αλλαγές σας στον καμβά:

+ + + +

{{ EmbedLiveSample('Playable_code', 700, 400) }}

+ +

Προδιαγραφές

+ + + + + + + + + + + + + + +
ΠροδιαγραφήΚατάστασηΣχόλιο
{{SpecName('HTML WHATWG', "scripting.html#dom-context-2d-imagesmoothingenabled", "CanvasRenderingContext2D.imageSmoothingEnabled")}}{{Spec2('HTML WHATWG')}} 
+ +

Συμβατότητα προγραμμάτων περιήγησης

+ +

{{ CompatibilityTable() }}

+ +
+ + + + + + + + + + + + + + + + + + + +
ΧαρακτηριστικόChromeFirefox (Gecko)Internet ExplorerOperaSafari
Basic support30 [1]{{ CompatVersionUnknown() }}
+ {{property_prefix("moz")}}
+ {{ CompatGeckoDesktop(51)}}		{{ CompatVersionUnknown() }}
+ {{property_prefix("ms")}}		{{ CompatUnknown() }}{{ CompatUnknown() }}
+
+ +
+ + + + + + + + + + + + + + + + + + + + + +
ΧαρακτηριστικόAndroidChrome for AndroidFirefox Mobile (Gecko)IE MobileOpera MobileSafari Mobile
Basic support{{ CompatUnknown() }}{{ CompatUnknown() }}{{ CompatVersionUnknown() }}
+ {{property_prefix("moz")}}
+ {{ CompatGeckoMobile(51)}}		{{ CompatUnknown() }}{{ CompatUnknown() }}{{ CompatUnknown() }}
+
+ +

[1] Υποστηρίζεται με webkit prefix μέχρι την έκδοση 29.

+ +

Δείτε επίσης

+ + diff --git a/files/el/web/api/canvasrenderingcontext2d/index.html b/files/el/web/api/canvasrenderingcontext2d/index.html new file mode 100644 index 0000000000..d6aa558a9c --- /dev/null +++ b/files/el/web/api/canvasrenderingcontext2d/index.html @@ -0,0 +1,448 @@ +--- +title: CanvasRenderingContext2D +slug: Web/API/CanvasRenderingContext2D +tags: + - API + - Canvas + - CanvasRenderingContext2D + - Games + - Graphics + - NeedsTranslation + - Reference + - TopicStub +translation_of: Web/API/CanvasRenderingContext2D +--- +
{{APIRef}}
+ +
The CanvasRenderingContext2D interface is used for drawing rectangles, text, images and other objects onto the canvas element. It provides the 2D rendering context for the drawing surface of a {{ HTMLElement("canvas") }} element.
+ +
 
+ +

To get an object of this interface, call {{domxref("HTMLCanvasElement.getContext()", "getContext()")}} on a <canvas> element, supplying "2d" as the argument:

+ +
var canvas = document.getElementById('myCanvas'); // in your HTML this element appears as <canvas id="mycanvas"></canvas>
+var ctx = canvas.getContext('2d');
+
+ +

Once you have the 2D rendering context for a canvas, you can draw within it. For example:

+ +
ctx.fillStyle = 'rgb(200,0,0)'; // sets the color to fill in the rectangle with
+ctx.fillRect(10, 10, 55, 50);   // draws the rectangle at position 10, 10 with a width of 55 and a height of 50
+
+ +

See the properties and methods in the sidebar and below. The canvas tutorial has more information, examples, and resources as well.

+ +

Drawing rectangles

+ +

There are three methods that immediately draw rectangles to the bitmap.

+ +
+
{{domxref("CanvasRenderingContext2D.clearRect()")}}
+
Sets all pixels in the rectangle defined by starting point (x, y) and size (width, height) to transparent black, erasing any previously drawn content.
+
{{domxref("CanvasRenderingContext2D.fillRect()")}}
+
Draws a filled rectangle at (x, y) position whose size is determined by width and height.
+
{{domxref("CanvasRenderingContext2D.strokeRect()")}}
+
Paints a rectangle which has a starting point at (x, y) and has a w width and an h height onto the canvas, using the current stroke style.
+
+ +

Drawing text

+ +

The following methods are provided for drawing text. See also the {{domxref("TextMetrics")}} object for text properties.

+ +
+
{{domxref("CanvasRenderingContext2D.fillText()")}}
+
Draws (fills) a given text at the given (x,y) position.
+
{{domxref("CanvasRenderingContext2D.strokeText()")}}
+
Draws (strokes) a given text at the given (x, y) position.
+
{{domxref("CanvasRenderingContext2D.measureText()")}}
+
Returns a {{domxref("TextMetrics")}} object.
+
+ +

Line styles

+ +

The following methods and properties control how lines are drawn.

+ +
+
{{domxref("CanvasRenderingContext2D.lineWidth")}}
+
Width of lines. Default 1.0
+
{{domxref("CanvasRenderingContext2D.lineCap")}}
+
Type of endings on the end of lines. Possible values: butt (default), round, square.
+
{{domxref("CanvasRenderingContext2D.lineJoin")}}
+
Defines the type of corners where two lines meet. Possible values: round, bevel, miter (default).
+
{{domxref("CanvasRenderingContext2D.miterLimit")}}
+
Miter limit ratio. Default 10.
+
{{domxref("CanvasRenderingContext2D.getLineDash()")}}
+
Returns the current line dash pattern array containing an even number of non-negative numbers.
+
{{domxref("CanvasRenderingContext2D.setLineDash()")}}
+
Sets the current line dash pattern.
+
{{domxref("CanvasRenderingContext2D.lineDashOffset")}}
+
Specifies where to start a dash array on a line.
+
+ +

Text styles

+ +

The following properties control how text is laid out.

+ +
+
{{domxref("CanvasRenderingContext2D.font")}}
+
Font setting. Default value 10px sans-serif.
+
{{domxref("CanvasRenderingContext2D.textAlign")}}
+
Text alignment setting. Possible values: start (default), end, left, right or center.
+
{{domxref("CanvasRenderingContext2D.textBaseline")}}
+
Baseline alignment setting. Possible values: top, hanging, middle, alphabetic (default), ideographic, bottom.
+
{{domxref("CanvasRenderingContext2D.direction")}}
+
Directionality. Possible values: ltr, rtl, inherit (default).
+
+ +

Fill and stroke styles

+ +

Fill styling is used for colors and styles inside shapes and stroke styling is used for the lines around shapes.

+ +
+
{{domxref("CanvasRenderingContext2D.fillStyle")}}
+
Color or style to use inside shapes. Default #000 (black).
+
{{domxref("CanvasRenderingContext2D.strokeStyle")}}
+
Color or style to use for the lines around shapes. Default #000 (black).
+
+ +

Gradients and patterns

+ +
+
{{domxref("CanvasRenderingContext2D.createLinearGradient()")}}
+
Creates a linear gradient along the line given by the coordinates represented by the parameters.
+
{{domxref("CanvasRenderingContext2D.createRadialGradient()")}}
+
Creates a radial gradient given by the coordinates of the two circles represented by the parameters.
+
{{domxref("CanvasRenderingContext2D.createPattern()")}}
+
Creates a pattern using the specified image (a {{domxref("CanvasImageSource")}}). It repeats the source in the directions specified by the repetition argument. This method returns a {{domxref("CanvasPattern")}}.
+
+ +

Shadows

+ +
+
{{domxref("CanvasRenderingContext2D.shadowBlur")}}
+
Specifies the blurring effect. Default 0
+
{{domxref("CanvasRenderingContext2D.shadowColor")}}
+
Color of the shadow. Default fully-transparent black.
+
{{domxref("CanvasRenderingContext2D.shadowOffsetX")}}
+
Horizontal distance the shadow will be offset. Default 0.
+
{{domxref("CanvasRenderingContext2D.shadowOffsetY")}}
+
Vertical distance the shadow will be offset. Default 0.
+
+ +

Paths

+ +

The following methods can be used to manipulate paths of objects.

+ +
+
{{domxref("CanvasRenderingContext2D.beginPath()")}}
+
Starts a new path by emptying the list of sub-paths. Call this method when you want to create a new path.
+
{{domxref("CanvasRenderingContext2D.closePath()")}}
+
Causes the point of the pen to move back to the start of the current sub-path. It tries to draw a straight line from the current point to the start. If the shape has already been closed or has only one point, this function does nothing.
+
{{domxref("CanvasRenderingContext2D.moveTo()")}}
+
Moves the starting point of a new sub-path to the (x, y) coordinates.
+
{{domxref("CanvasRenderingContext2D.lineTo()")}}
+
Connects the last point in the subpath to the x, y coordinates with a straight line.
+
{{domxref("CanvasRenderingContext2D.bezierCurveTo()")}}
+
Adds a cubic Bézier curve to the path. It requires three points. The first two points are control points and the third one is the end point. The starting point is the last point in the current path, which can be changed using moveTo() before creating the Bézier curve.
+
{{domxref("CanvasRenderingContext2D.quadraticCurveTo()")}}
+
Adds a quadratic Bézier curve to the current path.
+
{{domxref("CanvasRenderingContext2D.arc()")}}
+
Adds an arc to the path which is centered at (x, y) position with radius r starting at startAngle and ending at endAngle going in the given direction by anticlockwise (defaulting to clockwise).
+
{{domxref("CanvasRenderingContext2D.arcTo()")}}
+
Adds an arc to the path with the given control points and radius, connected to the previous point by a straight line.
+
{{domxref("CanvasRenderingContext2D.ellipse()")}} {{experimental_inline}}
+
Adds an ellipse to the path which is centered at (x, y) position with the radii radiusX and radiusY starting at startAngle and ending at endAngle going in the given direction by anticlockwise (defaulting to clockwise).
+
{{domxref("CanvasRenderingContext2D.rect()")}}
+
Creates a path for a rectangle at position (x, y) with a size that is determined by width and height.
+
+ +

Drawing paths

+ +
+
{{domxref("CanvasRenderingContext2D.fill()")}}
+
Fills the subpaths with the current fill style.
+
{{domxref("CanvasRenderingContext2D.stroke()")}}
+
Strokes the subpaths with the current stroke style.
+
{{domxref("CanvasRenderingContext2D.drawFocusIfNeeded()")}}
+
If a given element is focused, this method draws a focus ring around the current path.
+
{{domxref("CanvasRenderingContext2D.scrollPathIntoView()")}}
+
Scrolls the current path or a given path into the view.
+
{{domxref("CanvasRenderingContext2D.clip()")}}
+
Creates a clipping path from the current sub-paths. Everything drawn after clip() is called appears inside the clipping path only. For an example, see Clipping paths in the Canvas tutorial.
+
{{domxref("CanvasRenderingContext2D.isPointInPath()")}}
+
Reports whether or not the specified point is contained in the current path.
+
{{domxref("CanvasRenderingContext2D.isPointInStroke()")}}
+
Reports whether or not the specified point is inside the area contained by the stroking of a path.
+
+ +

Transformations

+ +

Objects in the CanvasRenderingContext2D rendering context have a current transformation matrix and methods to manipulate it. The transformation matrix is applied when creating the current default path, painting text, shapes and {{domxref("Path2D")}} objects. The methods listed below remain for historical and compatibility reasons as {{domxref("SVGMatrix")}} objects are used in most parts of the API nowadays and will be used in the future instead.

+ +
+
{{domxref("CanvasRenderingContext2D.currentTransform")}}
+
Current transformation matrix ({{domxref("SVGMatrix")}} object).
+
{{domxref("CanvasRenderingContext2D.rotate()")}}
+
Adds a rotation to the transformation matrix. The angle argument represents a clockwise rotation angle and is expressed in radians.
+
{{domxref("CanvasRenderingContext2D.scale()")}}
+
Adds a scaling transformation to the canvas units by x horizontally and by y vertically.
+
{{domxref("CanvasRenderingContext2D.translate()")}}
+
Adds a translation transformation by moving the canvas and its origin x horzontally and y vertically on the grid.
+
{{domxref("CanvasRenderingContext2D.transform()")}}
+
Multiplies the current transformation matrix with the matrix described by its arguments.
+
{{domxref("CanvasRenderingContext2D.setTransform()")}}
+
Resets the current transform to the identity matrix, and then invokes the transform() method with the same arguments.
+
{{domxref("CanvasRenderingContext2D.resetTransform()")}} {{experimental_inline}}
+
Resets the current transform by the identity matrix.
+
+ +

Compositing

+ +
+
{{domxref("CanvasRenderingContext2D.globalAlpha")}}
+
Alpha value that is applied to shapes and images before they are composited onto the canvas. Default 1.0 (opaque).
+
{{domxref("CanvasRenderingContext2D.globalCompositeOperation")}}
+
With globalAlpha applied this sets how shapes and images are drawn onto the existing bitmap.
+
+ +

Drawing images

+ +
+
{{domxref("CanvasRenderingContext2D.drawImage()")}}
+
Draws the specified image. This method is available in multiple formats, providing a great deal of flexibility in its use.
+
+ +

Pixel manipulation

+ +

See also the {{domxref("ImageData")}} object.

+ +
+
{{domxref("CanvasRenderingContext2D.createImageData()")}}
+
Creates a new, blank {{domxref("ImageData")}} object with the specified dimensions. All of the pixels in the new object are transparent black.
+
{{domxref("CanvasRenderingContext2D.getImageData()")}}
+
Returns an {{domxref("ImageData")}} object representing the underlying pixel data for the area of the canvas denoted by the rectangle which starts at (sx, sy) and has an sw width and sh height.
+
{{domxref("CanvasRenderingContext2D.putImageData()")}}
+
Paints data from the given {{domxref("ImageData")}} object onto the bitmap. If a dirty rectangle is provided, only the pixels from that rectangle are painted.
+
+ +

Image smoothing

+ +
+
{{domxref("CanvasRenderingContext2D.imageSmoothingEnabled")}} {{experimental_inline}}
+
Image smoothing mode; if disabled, images will not be smoothed if scaled.
+
+ +

The canvas state

+ +

The CanvasRenderingContext2D rendering context contains a variety of drawing style states (attributes for line styles, fill styles, shadow styles, text styles). The following methods help you to work with that state:

+ +
+
{{domxref("CanvasRenderingContext2D.save()")}}
+
Saves the current drawing style state using a stack so you can revert any change you make to it using restore().
+
{{domxref("CanvasRenderingContext2D.restore()")}}
+
Restores the drawing style state to the last element on the 'state stack' saved by save().
+
{{domxref("CanvasRenderingContext2D.canvas")}}
+
A read-only back-reference to the {{domxref("HTMLCanvasElement")}}. Might be {{jsxref("null")}} if it is not associated with a {{HTMLElement("canvas")}} element.
+
+ +

Hit regions

+ +
+
{{domxref("CanvasRenderingContext2D.addHitRegion()")}} {{experimental_inline}}
+
Adds a hit region to the canvas.
+
{{domxref("CanvasRenderingContext2D.removeHitRegion()")}} {{experimental_inline}}
+
Removes the hit region with the specified id from the canvas.
+
{{domxref("CanvasRenderingContext2D.clearHitRegions()")}} {{experimental_inline}}
+
Removes all hit regions from the canvas.
+
+ +

Non-standard APIs

+ + + +

Most of these APIs are deprecated and will be removed in the future.

+ +
+
{{non-standard_inline}} CanvasRenderingContext2D.clearShadow()
+
Removes all shadow settings like {{domxref("CanvasRenderingContext2D.shadowColor")}} and {{domxref("CanvasRenderingContext2D.shadowBlur")}}.
+
{{non-standard_inline}} CanvasRenderingContext2D.drawImageFromRect()
+
This is redundant with an equivalent overload of drawImage.
+
{{non-standard_inline}} CanvasRenderingContext2D.setAlpha()
+
Use {{domxref("CanvasRenderingContext2D.globalAlpha")}} instead.
+
{{non-standard_inline}} CanvasRenderingContext2D.setCompositeOperation()
+
Use {{domxref("CanvasRenderingContext2D.globalCompositeOperation")}} instead.
+
{{non-standard_inline}} CanvasRenderingContext2D.setLineWidth()
+
Use {{domxref("CanvasRenderingContext2D.lineWidth")}} instead.
+
{{non-standard_inline}} CanvasRenderingContext2D.setLineJoin()
+
Use {{domxref("CanvasRenderingContext2D.lineJoin")}} instead.
+
{{non-standard_inline}} CanvasRenderingContext2D.setLineCap()
+
Use {{domxref("CanvasRenderingContext2D.lineCap")}} instead.
+
{{non-standard_inline}} CanvasRenderingContext2D.setMiterLimit()
+
Use {{domxref("CanvasRenderingContext2D.miterLimit")}} instead.
+
{{non-standard_inline}} CanvasRenderingContext2D.setStrokeColor()
+
Use {{domxref("CanvasRenderingContext2D.strokeStyle")}} instead.
+
{{non-standard_inline}} CanvasRenderingContext2D.setFillColor()
+
Use {{domxref("CanvasRenderingContext2D.fillStyle")}} instead.
+
{{non-standard_inline}} CanvasRenderingContext2D.setShadow()
+
Use {{domxref("CanvasRenderingContext2D.shadowColor")}} and {{domxref("CanvasRenderingContext2D.shadowBlur")}} instead.
+
{{non-standard_inline}} CanvasRenderingContext2D.webkitLineDash
+
Use {{domxref("CanvasRenderingContext2D.getLineDash()")}} and {{domxref("CanvasRenderingContext2D.setLineDash()")}} instead.
+
{{non-standard_inline}} CanvasRenderingContext2D.webkitLineDashOffset
+
Use {{domxref("CanvasRenderingContext2D.lineDashOffset")}} instead.
+
{{non-standard_inline}} CanvasRenderingContext2D.webkitImageSmoothingEnabled
+
Use {{domxref("CanvasRenderingContext2D.imageSmoothingEnabled")}} instead.
+
+ + + +
+
{{non-standard_inline}} CanvasRenderingContext2D.getContextAttributes()
+
Inspired by the same WebGLRenderingContext method it returns an Canvas2DContextAttributes object that contains the attributes "storage" to indicate which storage is used ("persistent" by default) and the attribute "alpha" (true by default) to indicate that transparency is used in the canvas.
+
{{non-standard_inline}} CanvasRenderingContext2D.isContextLost()
+
Inspired by the same WebGLRenderingContext method it returns true if the Canvas context has been lost, or false if not.
+
+ +

WebKit only

+ +
+
{{non-standard_inline}} CanvasRenderingContext2D.webkitBackingStorePixelRatio
+
The backing store size in relation to the canvas element. See High DPI Canvas.
+
{{non-standard_inline}} CanvasRenderingContext2D.webkitGetImageDataHD
+
Intended for HD backing stores, but removed from canvas specifications.
+
{{non-standard_inline}} CanvasRenderingContext2D.webkitPutImageDataHD
+
Intended for HD backing stores, but removed from canvas specifications.
+
+ +
+
+ +

Gecko only

+ +
+
{{non-standard_inline}} {{domxref("CanvasRenderingContext2D.filter")}}
+
CSS and SVG filters as Canvas APIs. Likely to be standardized in a new version of the specification.
+
+ +

Prefixed APIs

+ +
+
{{non-standard_inline}} CanvasRenderingContext2D.mozCurrentTransform
+
Sets or gets the current transformation matrix, see {{domxref("CanvasRenderingContext2D.currentTransform")}}.  {{ gecko_minversion_inline("7.0") }}
+
{{non-standard_inline}} CanvasRenderingContext2D.mozCurrentTransformInverse
+
Sets or gets the current inversed transformation matrix.  {{ gecko_minversion_inline("7.0") }}
+
{{non-standard_inline}} CanvasRenderingContext2D.mozImageSmoothingEnabled
+
See {{domxref("CanvasRenderingContext2D.imageSmoothingEnabled")}}.
+
{{non-standard_inline}} {{deprecated_inline}} CanvasRenderingContext2D.mozTextStyle
+
Introduced in in Gecko 1.9, deprecated in favor of the {{domxref("CanvasRenderingContext2D.font")}} property.
+
{{non-standard_inline}} {{obsolete_inline}} CanvasRenderingContext2D.mozDrawText()
+
This method was introduced in Gecko 1.9 and is removed starting with Gecko 7.0. Use {{domxref("CanvasRenderingContext2D.strokeText()")}} or {{domxref("CanvasRenderingContext2D.fillText()")}} instead.
+
{{non-standard_inline}} {{obsolete_inline}} CanvasRenderingContext2D.mozMeasureText()
+
This method was introduced in Gecko 1.9 and is unimplemented starting with Gecko 7.0. Use {{domxref("CanvasRenderingContext2D.measureText()")}} instead.
+
{{non-standard_inline}} {{obsolete_inline}} CanvasRenderingContext2D.mozPathText()
+
This method was introduced in Gecko 1.9 and is removed starting with Gecko 7.0.
+
{{non-standard_inline}} {{obsolete_inline}} CanvasRenderingContext2D.mozTextAlongPath()
+
This method was introduced in Gecko 1.9 and is removed starting with Gecko 7.0.
+
+ +

Internal APIs (chrome-context only)

+ +
+
{{non-standard_inline}} {{domxref("CanvasRenderingContext2D.asyncDrawXULElement()")}}
+
Renders a region of a XUL element into the canvas.
+
{{non-standard_inline}} {{domxref("CanvasRenderingContext2D.drawWindow()")}}
+
Renders a region of a window into the canvas. The contents of the window's viewport are rendered, ignoring viewport clipping and scrolling.
+
{{non-standard_inline}} CanvasRenderingContext2D.demote()
+
This causes a context that is currently using a hardware-accelerated backend to fallback to a software one. All state should be preserved.
+
+ +

Internet Explorer

+ +
+
{{non-standard_inline}} CanvasRenderingContext2D.msFillRule
+
The fill rule to use. This must be one of evenodd or nonzero (default).
+
+ +

Specifications

+ + + + + + + + + + + + + + +
SpecificationStatusComment
{{SpecName('HTML WHATWG', "scripting.html#2dcontext:canvasrenderingcontext2d", "CanvasRenderingContext2D")}}{{Spec2('HTML WHATWG')}} 
+ +

Browser compatibility

+ +
{{CompatibilityTable}}
+ +
+ + + + + + + + + + + + + + + + + + + + + +
FeatureChromeEdgeFirefox (Gecko)Internet ExplorerOperaSafari
Basic support{{CompatChrome("1")}}{{CompatVersionUnknown}}{{CompatGeckoDesktop("1.8")}}{{CompatIE("9")}}{{CompatOpera("9")}}{{CompatSafari("2")}}
+
+ +
+ + + + + + + + + + + + + + + + + + + + + + + +
FeatureAndroidChrome for AndroidEdgeFirefox Mobile (Gecko)IE MobileOpera MobileSafari Mobile
Basic support{{CompatUnknown}}{{CompatUnknown}}{{CompatVersionUnknown}}{{CompatUnknown}}{{CompatUnknown}}{{CompatUnknown}}{{CompatUnknown}}
+
+ +

Compatibility notes

+ + + +

See also

+ + -- cgit v1.2.3-54-g00ecf