ZenBrowserMirrors/pdf.js
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Printing canvases at PDF document size.

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This commit is contained in:
Yury Delendik 2016-10-06 07:51:45 -05:00
parent 9b3a91f365
commit 29947b5a57
3 changed files with 15 additions and 29 deletions
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29
web/pdf_page_view.js
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@ -546,22 +546,18 @@ var PDFPageView = (function PDFPageViewClosure() {
var pdfPage = this.pdfPage;
var viewport = pdfPage.getViewport(1);
// Use the same hack we use for high dpi displays for printing to get
// better output until bug 811002 is fixed in FF.
var PRINT_OUTPUT_SCALE = 2;
var canvas = document.createElement('canvas');
// The logical size of the canvas.
canvas.width = Math.floor(viewport.width) * PRINT_OUTPUT_SCALE;
canvas.height = Math.floor(viewport.height) * PRINT_OUTPUT_SCALE;
// The size of the canvas in pixels for printing.
var PRINT_RESOLUTION = 150;
var PRINT_UNITS = PRINT_RESOLUTION / 72.0;
canvas.width = Math.floor(viewport.width * PRINT_UNITS);
canvas.height = Math.floor(viewport.height * PRINT_UNITS);
// The rendered size of the canvas, relative to the size of canvasWrapper.
canvas.style.width = (PRINT_OUTPUT_SCALE * 100) + '%';
var cssScale = 'scale(' + (1 / PRINT_OUTPUT_SCALE) + ', ' +
(1 / PRINT_OUTPUT_SCALE) + ')';
CustomStyle.setProp('transform' , canvas, cssScale);
CustomStyle.setProp('transformOrigin' , canvas, '0% 0%');
// The physical size of the canvas as specified by the PDF document.
canvas.style.width = Math.floor(viewport.width * CSS_UNITS) + 'px';
canvas.style.height = Math.floor(viewport.height * CSS_UNITS) + 'px';
var canvasWrapper = document.createElement('div');
canvasWrapper.appendChild(canvas);
@ -574,15 +570,10 @@ var PDFPageView = (function PDFPageViewClosure() {
ctx.fillStyle = 'rgb(255, 255, 255)';
ctx.fillRect(0, 0, canvas.width, canvas.height);
ctx.restore();
//#if !(MOZCENTRAL || FIREFOX)
// Used by the mozCurrentTransform polyfill in src/display/canvas.js.
ctx._transformMatrix =
[PRINT_OUTPUT_SCALE, 0, 0, PRINT_OUTPUT_SCALE, 0, 0];
//#endif
ctx.scale(PRINT_OUTPUT_SCALE, PRINT_OUTPUT_SCALE);
var renderContext = {
canvasContext: ctx,
transform: [PRINT_UNITS, 0, 0, PRINT_UNITS, 0, 0],
viewport: viewport,
intent: 'print'
};