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TilingPattern: Reverse transform after painting

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This transform resulted in an incorrectly positioned object when the
bounding box's upper-left corner did not start at (0,0), because
the translation was not reverted. This patch adds the missing transform.

The test file (tiling-pattern-box.pdf) is based on the PDF from #2825.
All but the first cube (including the PDF data) have been removed.
To trigger the bug that is fixed by this commit, I changed the BBox of
the first pattern from "[ 0 0 596 842]" to "[90 0 596 842]". Without
this patch, the dashed vertical line that intersects the corners at A
and E would disappear.
This commit is contained in:
Rob Wu 2015-11-07 15:02:37 +01:00
parent a72a8e921f
commit d3dc8f16b5
4 changed files with 2165 additions and 0 deletions
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src/display/pattern_helper.js
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@ -364,6 +364,8 @@ var TilingPattern = (function TilingPatternClosure() {
graphics.executeOperatorList(operatorList);
this.ctx.transform(1, 0, 0, 1, x0, y0);
// Rescale canvas so that the ctx.createPattern call generates a pattern
// with the desired size.
this.ctx.scale(1 / dimx.scale, 1 / dimy.scale);