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When we allocate a pixmap > 2G, but < 4G, the index into that
pixmap, when calculated as an int can be negative. Fix this with
various casts to unsigned int.
If we ever move to support >4G images we'll need to rejig the
casting to cast each part of the element to ptrdiff_t first.
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Depending on the operation used (< or <=) the threshold array should
never have either 0 and ff in it. As we are using <, it should never
have 0 in it. Fixed here.
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Debug printing functions: debug -> print.
Accessors: get noun attribute -> noun attribute.
Find -> lookup when the returned value is not reference counted.
pixmap_with_rect -> pixmap_with_bbox.
We are reserving the word "find" to mean lookups that give ownership
of objects to the caller. Lookup is used in other places where the
ownership is not transferred, or simple values are returned.
The rename is done by the sed script in scripts/rename3.sed
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A NULL halftone pointer passed to fz_halftone_pixmap is now taken
to mean "use the default halftone".
This means we can remove most of the halftone functions from the
public API until (post 1.0) we decide to flesh out the functionality.
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Attempt to separate public API from internal functions.
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Also: use 'cannot' instead of 'failed to' in error messages.
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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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Add fz_bitmaps (1bpc versions of pixmaps, really).
Add fz_halftones (arrays of fz_pixmaps used as threshold arrays).
Add simple halftoning code.
Add pdfdraw usage of the above (ask for a .pbm and you get a halftoned image).
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