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authorRobin Watts <Robin.Watts@artifex.com>2011-07-06 13:58:16 +0100
committerRobin Watts <Robin.Watts@artifex.com>2011-07-06 14:57:54 +0100
commit2f8acb0010c469c46682a298d66b108cc4c6cdd0 (patch)
tree7e6f07c13df5037e29203d00d115981638cb802d /fitz
parent28e88083d782eba796ec9af2469e57011dc4aa89 (diff)
downloadmupdf-2f8acb0010c469c46682a298d66b108cc4c6cdd0.tar.xz
Tweak mupdf clip path handling.
In the existing mupdf clip path code, it would be possible for us to render incorrectly; consider the following fragment of a content stream: 0 0 100 100 re W 50 50 100 100 re f That should set the clip path to the (0, 0) -> (100, 100) rectangle, and then attempt to fill both the (0,0) -> (100,100) rectangle and the (50,50) -> (150,150) rectangle, resulting in just the (0,0) -> (100,100) rectangle being filled. In the existing mupdf code, it would actually fill both rectangles as the path after the W operation (the addition of the second rectangle) would also affect the stored clip path. We solve this by doing the clip operation on the W operator, rather than deferred to when the path is actually disposed of.
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