yetangitu/pixstatic
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fix globalAlpha check so it doesn't barf in IE

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root 2009-09-04 07:51:27 +02:00
parent 848690c5b7
commit b18accbfe7
1 changed files with 19 additions and 16 deletions
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35
pixastic.core.js
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@ -332,8 +332,9 @@ var Pixastic = (function() {
return img;
}
} else if (Pixastic.Client.isIE() && typeof img.__pixastic_org_style != "undefined") {
img.style.cssText = img.__pixastic_org_style;
} else if (Pixastic.Client.isIE()) {
if (typeof img.__pixastic_org_style != "undefined")
img.style.cssText = img.__pixastic_org_style;
}
},
@ -364,24 +365,26 @@ var Pixastic = (function() {
})(),
hasGlobalAlpha : (function() {
var hasAlpha = false;
var red = document.createElement("canvas");
red.width = red.height = 1;
var redctx = red.getContext("2d");
redctx.fillStyle = "rgb(255,0,0)";
redctx.fillRect(0,0,1,1);
if (red.getContext) {
red.width = red.height = 1;
var redctx = red.getContext("2d");
redctx.fillStyle = "rgb(255,0,0)";
redctx.fillRect(0,0,1,1);
var blue = document.createElement("canvas");
blue.width = blue.height = 1;
var bluectx = red.getContext("2d");
bluectx.fillStyle = "rgb(0,0,255)";
bluectx.fillRect(0,0,1,1);
var blue = document.createElement("canvas");
blue.width = blue.height = 1;
var bluectx = red.getContext("2d");
bluectx.fillStyle = "rgb(0,0,255)";
bluectx.fillRect(0,0,1,1);
redctx.globalAlpha = 0.5;
redctx.drawImage(blue, 0, 0);
var reddata = redctx.getImageData(0,0,1,1).data;
var hasAlpha = (reddata[2] != 255);
redctx.globalAlpha = 0.5;
redctx.drawImage(blue, 0, 0);
var reddata = redctx.getImageData(0,0,1,1).data;
hasAlpha = (reddata[2] != 255);
}
return function() {
return hasAlpha;
}