[ANN] FreeType+Subpixel anti-aliasing Update

Alan Kay alan.kay at squeakland.org
Mon Aug 14 20:39:32 UTC 2006


Very nice!

Cheers,

Alan

----------

At 04:25 PM 8/13/2006, Andrew Tween wrote:
>An updated vm+plugins+image containing my latest work in getting the FreeType
>font support from the Sophie project into 3.9 can be obtained from here...
>
>http://www.zen61439.zen.co.uk/Squeak3.9g-7054_FreeType.zip
>
>This is for Windows only. I'll try a Linux build next.
>
>Screenshots, for those lucky enough not to have Windows, are here...
>
>http://www.zen61439.zen.co.uk/lcdOff.png
>http://www.zen61439.zen.co.uk/lcdOn.png
>
>lcdOff.png is with the sub-pixel rendering turned off, and lcdOn.png with it
>switched on.
>
>Cheers,
>Andy
>----------------
> >From the readme.text file...
>
>This distribution contains the latest work on harvesting/porting the FreeType
>code from the Sophie project into Squeak3.9, and rescuing/updating the LCD
>subpixel anti-aliasing work started by the late Henrik Gedenryd.
>
>I have only compiled the required plugins for Win32, so this release is for
>Win32 only. It has been tested on Win2000.
>
>-------
>
>The FT2Plugin is now external (FT2Plugin.dll). It now uses the latest
>FreeType2.2.1 library.
>
>Now works with 32,16, and 8 bit display depths.
>
>Gamma correction improved (now applied by the new BitBlt mode).
>
>Underline and Strikeout emphasis supported
>
>Synthetic emphasis is applied when a font does not support that emphasis
>directly. e.g. can now have Italic, and Bold-italic emphasis for Bitstream 
>Vera
>Serif.
>Synthetic emphasis is indicated with an asterisk in the System Fonts 
>picker e.g.
>Bold*, Bold Italic*.
>
>Fonts can be stored in the image as ByteArrays, and used by the FreeType 
>plugin,
>without requiring the font file to exist, or be re-created, on disk.
>
>Fonts can be loaded through FileList services.
>There are options to embed a file's contents into the image (as described
>above); or to use the file each time the font needs to be accessed.
>Font files must be placed in the ./fonts folder before installing - this 
>will be
>improved later.
>
>If a font file is missing from the ./Fonts folder when the image is started, a
>substitute strike font (Accuny or Accumon) will be used in its place.
>
>There is a new cache to hold the character glyphs/metrics for each font. The
>maximum size of the cache can be set (in Kb).
>
>-------
>TODO:
>
>Kerning.
>
>Rotated text in subpixel mode.
>
>Loading font files from anywhere on disk.
>
>Loading whole font families in one operation (e.g. no need to load Vera.ttf,
>VeraBd.ttf, VeraIt.ttf, and VeraBI.ttf separately to install Bitstream Vera
>Sans).
>
>Improve sub-pixel filtering. (implement in plugin to speed up)
>
>See if support for pfb, pfa can be improved (attaching metric files).
>
>Support for other font types (currently ttf, ttc, otf, otc, pfa, pfb are
>supported).
>
>Support for ttf files without unicode char maps.
>
>Better font substitution for missing font files (i.e. use a sans serif strike
>font in place of a missing sans serif ttf font).
>
>Better underline/strikeout emphasis (currently drawn as solid line, but should
>be anti-aliased for non-integral line widths/alignment)





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