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clear canvas before rendering to allow jpeg export

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* normally when exporting jpeg any pixel that was transparent
   becomes black, make them white
 * check for window.console.log before use (avoid crash)
 * html2canvas.Parse: fix missing call to html2canvas.Util.Extend for the
   given options
This commit is contained in:
Obexer Christoph 2011-11-18 11:53:26 +01:00
parent 2a3d6a0a35
commit 044b612d6e
3 changed files with 10 additions and 4 deletions
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2
src/Core.js
View File

@ -11,7 +11,7 @@ var html2canvas = {};
html2canvas.logging = true;
html2canvas.log = function (a) {
if (html2canvas.logging) {
if (html2canvas.logging && window.console && window.console.log) {
window.console.log(a);
}
};

3
src/Parse.js
View File

@ -47,6 +47,7 @@ html2canvas.Parse = function (element, images, opts) {
children,
childrenLen;
options = html2canvas.Util.Extend(opts, options);
images = images || [];
@ -1254,4 +1255,4 @@ html2canvas.zContext = function(zindex) {
zindex: zindex,
children: []
};
};
};

9
src/Renderer.js
View File

@ -78,12 +78,17 @@ html2canvas.Renderer = function(parseQueue, opts){
queueLen,
a,
storageLen,
renderItem;
renderItem,
fstyle;
canvas.width = options.width || zStack.ctx.width;
canvas.height = options.height || zStack.ctx.height;
fstyle = ctx.fillStyle;
ctx.fillStyle = "#fff";
ctx.fillRect(0, 0, canvas.width, canvas.height);
ctx.fillStyle = fstyle;
for (i = 0, queueLen = queue.length; i < queueLen; i+=1){
storageContext = queue.splice(0, 1)[0];