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Huge pervasive change to lots of files, adding a context for exception
handling and allocation.
In time we'll move more statics into there.
Also fix some for(i = 0; i < function(...); i++) calls.
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Firstly, this takes on some of Zenikos patch to correct the clip
stack handling that was broken by the fix to bug 692287 (in commit
2c3bbbf). This bug should now be solved.
We add a new 'shape' field to the draw device structure (and clip
stack). When we are inside non-isolated groups, this is set to be
a pixmap where we accumulate the 'shape' of the objects drawn.
When we come to blend back, if we are blending a non-isolated group
back, we have to use a different blending function that takes account
of the shape.
Various internal groups (the page group, and groups used to force
blending) are set to be isolated to avoid carrying shape planes
around when this is not required.
All our rendering code now has to know how to maintain the shape
plane as well as doing the basic rendering.
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First, we add clipping rects to clipping functions. Various functions
(the ones that handle clipping) are now additionally passed a rectangle
that represents an additional bound for this clip in device space
(i.e. it has already been mapped through the current ctm).
Next, when constructing the displaylist, keep track of the bounding box
for the contents of each clip.
While writing the list, on every node we add, we add the bbox for that
node to the enclosing clips content bbox (if there is an enclosing clip).
When we pop a clip, write back to the corresponding push to update
the bbox.
This means if we get large clip regions, with only small areas used within
them, we will only do the slow blending for those small areas.
Finally, we fix a calculation in fz_bound_path which was incorrectly
accounting for mitrelimits. This was showing up in testing on page 630
of the PDF reference v1.7.
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The run-together words are dead! Long live the underscores!
The postscript inspired naming convention of using all run-together
words has served us well, but it is now time for more readable code.
In this commit I have also added the sed script, rename.sed, that I used
to convert the source. Use it on your patches and application code.
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when drawing primitive objects.
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extraction device.
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rendering mode support.
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