multiple master fonts are an extension of the adobe type 1 font format. we don't have any special case handling for them so for now we default to attempting to use the adobe type 1 font handler. it may be that we need some special parsing logic but the test file using the mmtype1 fonts didn't actually specify any font bytes so we can't check.
decimal numbers were dependent on the current thread culture for the output file. this meant values like '70.679' were output as '70,679' for cultures using a comma rather than period separator for the floating point (i.e. the whole world). this resulted in the file displaying incorrectly.
though a form dictionary should always contain fields (as required by the spec) it is possible for this entry to be missing. in this case we return false for trygetform.
though required by the spec an adobe type 1 font may be missing all width data. in this case we default to empty values and treat it like a normal adobe type 1 font.
the additional stored fields made the struct slower to copy and had an impact on the performance. this moves non-essential fields back to computed properties.
since the rectangle constructor is a hot path any calculations slow the library down considerably. for this reason we move calculations for the following properties into the property getter:
* width (cached)
* height (cached)
* rotation
* area
* centroid
where values are cached they set their backing field once calculated. this won't be thread safe if the same rectangle is accessed on multiple threads.
now that rectangle constructor uses the order [ llx, lly, urx, ury ] and does not apply correction for points constructor parameters must be passed in the correct order. this change fixes the hyperlink factory which was passing them in the wrong order.
in addition the pdfpath bounding box was using left, right, top and bottom to calculate the minimum bounding box. this produced incorrect values now individual path operator bounding boxes are rotated, since for a rotated rectangle top may be less than bottom.
the performance seems to have taken a hit due to these changes however.
