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the "hieght" and the 72dpi<->96dpi fixes

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notmasteryet 2011-06-29 22:43:59 -05:00
parent 29d0d8a8a9
commit 5ece4da552
8 changed files with 48 additions and 27 deletions
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19
multi_page_viewer.js
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@ -29,11 +29,15 @@ var PDFViewer = {
scale: 1.0,
pageWidth: function(page) {
return page.mediaBox[2] * PDFViewer.scale;
var pdfToCssUnitsCoef = 96.0 / 72.0;
var width = (page.mediaBox[2] - page.mediaBox[0]);
return width * PDFViewer.scale * pdfToCssUnitsCoef;
},
pageHeight: function(page) {
return page.mediaBox[3] * PDFViewer.scale;
var pdfToCssUnitsCoef = 96.0 / 72.0;
var height = (page.mediaBox[3] - page.mediaBox[1]);
return height * PDFViewer.scale * pdfToCssUnitsCoef;
},
lastPagesDrawn: [],
@ -106,10 +110,11 @@ var PDFViewer = {
canvas.id = 'thumbnail' + num;
canvas.mozOpaque = true;
// Canvas dimensions must be specified in CSS pixels. CSS pixels
// are always 96 dpi. These dimensions are 8.5in x 11in at 96dpi.
canvas.width = 104;
canvas.height = 134;
var pageWidth = PDFViewer.pageWidth(page);
var pageHeight = PDFViewer.pageHeight(page);
var thumbScale = Math.min(104 / pageWidth, 134 / pageHeight);
canvas.width = pageWidth * thumbScale;
canvas.height = pageHeight * thumbScale;
div.appendChild(canvas);
var ctx = canvas.getContext('2d');
@ -175,8 +180,6 @@ var PDFViewer = {
canvas.id = 'page' + num;
canvas.mozOpaque = true;
// Canvas dimensions must be specified in CSS pixels. CSS pixels
// are always 96 dpi. These dimensions are 8.5in x 11in at 96dpi.
canvas.width = PDFViewer.pageWidth(page);
canvas.height = PDFViewer.pageHeight(page);
div.appendChild(canvas);