blob: fb19b4203413e63a7f9d8d5b4c72ec03ded6b856 [file] [log] [blame]
/*
* 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;