我试图使用PIXIJs库来显示SVG图像,但在智能手机上SVG似乎很模糊。
var $ = window.jQuery;
var PIXI = window.PIXI;
$(document).ready(onReady);
var devicePixelRatio;
var width =800;
var height=600;
var scale = 5;
var renderer;
var stage;
var canvas;
function onReady() {
devicePixelRatio = $(window).devicePixelRatio;
canvas = window.document.createElement("canvas");
canvas.style.width = width + "px";
canvas.style.height = height + "px";
var container = document.getElementById("container");
container.appendChild(canvas);
var svgimgtag = document.getElementById("svgimgtag");
svgimgtag.style.top = 160 + "px";
svgimgtag.style.left = 500 + "px";
svgimgtag.style.width = 64 * scale + "px";
svgimgtag.style.height = 64 * scale + "px";
svgimgtag.src = 'https://rawgit.com/dentez/848fe2b6a8da7b3a78bacded90bd4f61/raw/89bb179753df9ee3e8b62d8c7a0c7620b6db144e/bee.svg';
renderer = PIXI.autoDetectRenderer(width , height , {
backgroundColor: 0xFFFFFF,
view: canvas,
resolution: devicePixelRatio
});
stage = new PIXI.Stage(0xFFFFFF);
document.body.appendChild(renderer.view);
renderer.view.style.position = 'absolute';
requestAnimationFrame(update);
beeTexture = new PIXI.Texture.fromImage('https://rawgit.com/dentez/848fe2b6a8da7b3a78bacded90bd4f61/raw/89bb179753df9ee3e8b62d8c7a0c7620b6db144e/bee.svg', undefined, undefined, scale);
var bee = new PIXI.Sprite(beeTexture);
bee.anchor.x = 0.5;
bee.anchor.y = 1;
bee.position.x = 400;
bee.position.y = 300;
//bunny.scale.set(1);
stage.addChild(bee);
renderer.resize(width, height);
}
function update() {
renderer.render(stage);
requestAnimationFrame(update);
}
在桌面浏览器上似乎没问题,但是当我在我的智能手机或Android模拟器上尝试这个时,SVG呈现如下:
(左边的图像是PIXI-SVG;右边是html img标签)。
也许它与devicePixelRatio有关,似乎浏览器"放大"适合屏幕 - 因为在桌面上,如果我放大,我可以模仿相同的行为。 我究竟做错了什么?如何显示/缩放SVG的正确方法?
答案 0 :(得分:0)
这是因为PIXI根据此行中SVG图像(64x64)的大小将SVG栅格化为纹理:
beeTexture = new PIXI.Texture.fromImage
然后它被缩放,并且很可能,这看起来很模糊。
您可以为fromImage提供sourceScale参数,以更大比例对其进行栅格化。或者尝试使用PIXI的第三方库之一将SVG渲染为向量。 Google会返回此内容,但看起来并非如此积极维护: https://github.com/bigtimebuddy/pixi-svg
有关详情,请参阅此处的讨论: https://github.com/pixijs/pixi.js/issues/936