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Merge pull request #39 from FuZhenn/master

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fixed a bug with globalAlpha
This commit is contained in:
Gabriel Hernandez 2016-01-20 11:17:38 -08:00
commit aab4b1808c
2 changed files with 56 additions and 4 deletions
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20
canvas2svg.js
View File

@ -368,10 +368,26 @@
regex = /rgba\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d?\.?\d*)\s*\)/gi;
matches = regex.exec(value);
this.__currentElement.setAttribute(style.svgAttr, format("rgb({r},{g},{b})", {r:matches[1], g:matches[2], b:matches[3]}));
this.__currentElement.setAttribute(style.svgAttr+"-opacity", matches[4]);
//should take globalAlpha here
var opacity = matches[4];
var globalAlpha = this.globalAlpha;
if (globalAlpha != null) {
opacity *= globalAlpha;
}
this.__currentElement.setAttribute(style.svgAttr+"-opacity", opacity);
} else {
var attr = style.svgAttr;
if (keys[i] === 'globalAlpha') {
attr = type+'-'+style.svgAttr;
if (this.__currentElement.getAttribute(attr)) {
//fill-opacity or stroke-opacity has already been set by stroke or fill.
continue;
}
}
//otherwise only update attribute if right type, and not svg default
this.__currentElement.setAttribute(style.svgAttr, value);
this.__currentElement.setAttribute(attr, value);
}
}
}

36
test/unit.spec.js
View File

@ -296,4 +296,40 @@ describe('canvas2svg', function() {
});
});
describe("supports globalOpacity", function() {
it("set stroke-opacity when stroking and set fill-opacity when filling",function() {
var ctx = new C2S();
ctx.globalAlpha = 0.5;
ctx.moveTo(5,5);
ctx.lineTo(15,15);
ctx.stroke();
var svg = ctx.getSvg();
expect(svg.querySelector("path").getAttribute("stroke-opacity")).to.equal('0.5');
ctx.globalAlpha = 0.1;
ctx.fillStyle = "#000000";
ctx.fill();
expect(svg.querySelector("path").getAttribute("fill-opacity")).to.equal('0.1');
//stroke-opacity stays o.5
expect(svg.querySelector("path").getAttribute("stroke-opacity")).to.equal('0.5');
});
it("added into color opacity when stroking or filling with rgba style color. ",function() {
var ctx = new C2S();
ctx.strokeStyle="rgba(0,0,0,0.8)";
ctx.globalAlpha = 0.5;
ctx.moveTo(5,5);
ctx.lineTo(15,15);
ctx.stroke();
var svg = ctx.getSvg();
expect(svg.querySelector("path").getAttribute("stroke")).to.equal('rgb(0,0,0)');
//stroke-opacity should be globalAlpha*(alpha in rgba)
expect(svg.querySelector("path").getAttribute("stroke-opacity")).to.equal(''+0.8*0.5);
ctx.globalAlpha = 0.6;
ctx.fillStyle = "rgba(0,0,0,0.6)";
ctx.fill();
expect(svg.querySelector("path").getAttribute("fill-opacity")).to.equal(''+0.6*0.6);
expect(svg.querySelector("path").getAttribute("stroke-opacity")).to.equal(''+0.8*0.5);
});
});
});