pdf4tcl changes

Changes

• TBW

• Support tko::path for PDF generation.
• Canvas method returns bbox.
• Added -textscale to canvas method.
• Support grayscale JPEG.
• Added TIFF image support.

• Added -closed option to polygon method.
• Added gsave and grestore methods.
• Added clip method for creating clip region.
• Added -id and -multiline options to addForm method.
• Make PDF reader handle incremental updates in files.
• Added pdf4tcl::getForms command for extracting Form data from PDF file.
• Allow canvas -fontmap to select size.

• Requires Tcl 8.6. Does not require Snit.
• Added -compress option to addRawImage and putRawImage.
• Added -angle and -anchor options to putImage and putRawImage.
• Fixed bug where an unnecessary startPage was called from addImage and addRawImage.
• Added pdf4tcl::getFonts call.
• Added -dryrun option to drawTextBox method.

• Pdf4tcl objects are now TclOO objects. Some of the ways to create an object is therefore different and will not work. The documented way, using pdf4tcl::new, should work as before.
• Default value of document option -compress is now true.
• Removed deprecated functionality:
  • Method cleanup removed (use destroy)
  • Method qCurve removed (use curve)
  • Method drawText removed (use text and newLine)
  • Method addJpeg removed (use addImage)
  • Non-option arguments to startPage removed (use options)

• Note: 0.8.4 will be the last version to support Tcl 8.4/8.5, and the last to require Snit. Next will require TclOO and other 8.6 features.
• Adapted to tkpath items, using itempdf support in tkpath.
• Support for characters outside BMP, if run in a Tcl-version supporting it.
• Added addForm method, for creating interactive forms.
• Added catPdf command.
• setLineStyle, setLineWidth and setLineDash now interprets their inputs with units, like all distances
• Added document flag -cmyk and started on CMYK support.
• Added startXObject method, for creating Form XObjects.
• Added embedFile and attachFile methods.

• Added curve method, replacing qCurve.
• Handle built in zlib in 8.6 [Bug 18353].
• Support patterns for canvas dashes.
• Added -fontmap to canvas dump to control fonts.
• Added setLineWidth and setLineDash methods.
• Fixed bug "that makes non-latin Italic TTF-fonts unusable".

• Corrected text angle to be CCW like other angles.
• Deprecated: qCurve.
• Cleaned up to name ascend/descent font metrics consistently.

• Support for embedding TrueType or Type1 fonts.
• Added getTextPosition method.
• Added -rotate page option.
• Added getImageHeight, getImageWidth, getImageSize methods.
• Added bookmarkAdd and metadata methods.
• Support background fill for angled text.

• Changed height metric in getFontMetric to measure full bbox for all fonts.

• Use cp1252 encoding to match font encoding.
• Added -linesvar option to drawTextBox.

• New method canvas for dumping canvas contents to PDF. Demo
• PNG support (alpha channels and interlace is not supported).
• New method addImage for generic image handling.
• New methods putRawImage, addRawImage.
• New methods moveTextPosition, setLineSpacing, getLineSpacing.
• Support Tk's units "m", "c" and "p".
• Added height metric to getFontMetric.
• Added document option -unit.
• Reworked drawTextBox to work correctly in all orientations. Possibly incompatible.
• Support Tk color formats.

• Methods circle, polygon and arc changed to be more consistent.
• Deprecated: addJpeg.
• Removed: drawText, drawTextAt, beginTextObj, endTextObj, moveTo, closePath.
• Require an explicit set font. Nothing default anymore.

• Added -file option to continuously write to file instead of accumulating in memory.
• More font metric introspection.
• More general handling of page properties like size and margins.
• Draw text with background fill.
• All user coordinates support e.g. "5mm" as input.
• Redesigned to use Snit to get clearer code. This caused a noticable slowdown but since Snit will be more than twice as fast with 8.5 this will probably be regained.