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Normalize the BBox entry in Tiling Pattern dictionaries (issue 8117)

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According to the PDF specification, see http://www.adobe.com/content/dam/Adobe/en/devnet/acrobat/pdfs/PDF32000_2008.pdf#G7.3982967, the `BBox` entry should have the form `[left, bottom, right, top]`.
Since some PDF generators apparently violates the specification, we normalize the `BBox` to ensure that the pattern is (correctly) rendered.

Fixes 8117.
This commit is contained in:
Jonas Jenwald 2017-03-16 21:41:13 +01:00
parent 2b17188998
commit 098a56270d
3 changed files with 10 additions and 2 deletions
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4
src/display/pattern_helper.js
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@ -318,7 +318,7 @@ var TilingPattern = (function TilingPatternClosure() {
function TilingPattern(IR, color, ctx, canvasGraphicsFactory, baseTransform) {
this.operatorList = IR[2];
this.matrix = IR[3] || [1, 0, 0, 1, 0, 0];
this.bbox = IR[4];
this.bbox = Util.normalizeRect(IR[4]);
this.xstep = IR[5];
this.ystep = IR[6];
this.paintType = IR[7];
@ -406,7 +406,7 @@ var TilingPattern = (function TilingPatternClosure() {
},
clipBbox: function clipBbox(graphics, bbox, x0, y0, x1, y1) {
if (bbox && isArray(bbox) && bbox.length === 4) {
if (isArray(bbox) && bbox.length === 4) {
var bboxWidth = x1 - x0;
var bboxHeight = y1 - y0;
graphics.ctx.rect(x0, y0, bboxWidth, bboxHeight);