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Make canvas transform matrix account for devicePixelRatio

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mduan 2013-01-15 16:40:39 -08:00
parent fa1133f784
commit 6bacb38692
2 changed files with 6 additions and 1 deletions
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4
src/canvas.js
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@ -46,6 +46,8 @@ function addContextCurrentTransform(ctx) {
// If the context doesn't expose a `mozCurrentTransform`, add a JS based on.
if (!ctx.mozCurrentTransform) {
// Store the original context
ctx._scaleX = ctx._scaleX || 1.0;
ctx._scaleY = ctx._scaleY || 1.0;
ctx._originalSave = ctx.save;
ctx._originalRestore = ctx.restore;
ctx._originalRotate = ctx.rotate;
@ -53,7 +55,7 @@ function addContextCurrentTransform(ctx) {
ctx._originalTranslate = ctx.translate;
ctx._originalTransform = ctx.transform;
ctx._transformMatrix = [1, 0, 0, 1, 0, 0];
ctx._transformMatrix = [ctx._scaleX, 0, 0, ctx._scaleY, 0, 0];
ctx._transformStack = [];
Object.defineProperty(ctx, 'mozCurrentTransform', {