Andrew Zambazos
132 lines
4.6 KiB
JavaScript
132 lines
4.6 KiB
JavaScript
/*
|
|
* Copyright (C) 2013, 2015 Apple Inc. All rights reserved.
|
|
* Copyright (C) 2017 Devin Rousso <webkit@devinrousso.com>. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
|
|
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
|
|
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
|
|
* THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
WI.ImageUtilities = class ImageUtilities {
|
|
static useSVGSymbol(url, className, title)
|
|
{
|
|
const svgNamespace = "http://www.w3.org/2000/svg";
|
|
const xlinkNamespace = "http://www.w3.org/1999/xlink";
|
|
|
|
let svgElement = document.createElementNS(svgNamespace, "svg");
|
|
svgElement.style.width = "100%";
|
|
svgElement.style.height = "100%";
|
|
|
|
// URL must contain a fragment reference to a graphical element, like a symbol. If none is given
|
|
// append #root which all of our SVGs have on the top level <svg> element.
|
|
if (!url.includes("#"))
|
|
url += "#root";
|
|
|
|
let useElement = document.createElementNS(svgNamespace, "use");
|
|
useElement.setAttributeNS(xlinkNamespace, "xlink:href", url);
|
|
svgElement.appendChild(useElement);
|
|
|
|
let wrapper = document.createElement("div");
|
|
wrapper.appendChild(svgElement);
|
|
|
|
if (className)
|
|
wrapper.className = className;
|
|
if (title)
|
|
wrapper.title = title;
|
|
|
|
return wrapper;
|
|
}
|
|
|
|
static promisifyLoad(src)
|
|
{
|
|
return new Promise((resolve, reject) => {
|
|
let image = new Image;
|
|
let resolveWithImage = () => { resolve(image); };
|
|
image.addEventListener("load", resolveWithImage);
|
|
image.addEventListener("error", resolveWithImage);
|
|
image.src = src;
|
|
});
|
|
}
|
|
|
|
static scratchCanvasContext2D(callback)
|
|
{
|
|
if (!WI.ImageUtilities._scratchContext2D)
|
|
WI.ImageUtilities._scratchContext2D = document.createElement("canvas").getContext("2d");
|
|
|
|
let context = WI.ImageUtilities._scratchContext2D;
|
|
|
|
context.clearRect(0, 0, context.canvas.width, context.canvas.height);
|
|
context.save();
|
|
callback(context);
|
|
context.restore();
|
|
}
|
|
|
|
static imageFromImageBitmap(data)
|
|
{
|
|
console.assert(data instanceof ImageBitmap);
|
|
|
|
let image = null;
|
|
WI.ImageUtilities.scratchCanvasContext2D((context) => {
|
|
context.canvas.width = data.width;
|
|
context.canvas.height = data.height;
|
|
context.drawImage(data, 0, 0);
|
|
|
|
image = new Image;
|
|
image.src = context.canvas.toDataURL();
|
|
});
|
|
return image;
|
|
}
|
|
|
|
static imageFromImageData(data)
|
|
{
|
|
console.assert(data instanceof ImageData);
|
|
|
|
let image = null;
|
|
WI.ImageUtilities.scratchCanvasContext2D((context) => {
|
|
context.canvas.width = data.width;
|
|
context.canvas.height = data.height;
|
|
context.putImageData(data, 0, 0);
|
|
|
|
image = new Image;
|
|
image.src = context.canvas.toDataURL();
|
|
});
|
|
return image;
|
|
}
|
|
|
|
static imageFromCanvasGradient(gradient, width, height)
|
|
{
|
|
console.assert(gradient instanceof CanvasGradient);
|
|
|
|
let image = null;
|
|
WI.ImageUtilities.scratchCanvasContext2D((context) => {
|
|
context.canvas.width = width;
|
|
context.canvas.height = height;
|
|
context.fillStyle = gradient;
|
|
context.fillRect(0, 0, width, height);
|
|
|
|
image = new Image;
|
|
image.src = context.canvas.toDataURL();
|
|
});
|
|
return image;
|
|
}
|
|
};
|
|
|
|
WI.ImageUtilities._scratchContext2D = null;
|