Sakurai/pdf.js
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Merge pull request #2572 from mduan/issue2477

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Make canvas transform matrix account for devicePixelRatio
This commit is contained in:
Yury Delendik 2013-01-30 20:25:43 -08:00
commit cca1a68adf
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', {

3
web/viewer.js
View File

@ -2078,6 +2078,9 @@ var PageView = function pageView(container, pdfPage, id, scale,
}
var ctx = canvas.getContext('2d');
// TODO(mack): use data attributes to store these
ctx._scaleX = outputScale.sx;
ctx._scaleY = outputScale.sy;
ctx.save();
ctx.fillStyle = 'rgb(255, 255, 255)';
ctx.fillRect(0, 0, canvas.width, canvas.height);