Commit (HEAD): glyph measurement caching (PLEASE READ)

From: Hubert Figuiere (hfiguiere@teaser.fr)
Date: Tue May 20 2003 - 06:56:31 EDT

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THIS BREAK THE BUILD. See below, for trivial fixes.

Due to lack a of performance in the glyph measurement code I had to
implement caching for char widths. Since this can be inherently
cross-platform, I did implement it in the XP land. I hope that it does
not block anyone.

What you should do:
-implement measureUnremappedCharForCache() in your GR_Font subclass to
really do the font measurement. As I can understand from Win32 way to
do things, Win32 platform may just return 0.
-initialize GR_Font::m_hashKey in the constructor of your GR_Font
subclass. This hash key is an UT_String that identifies uniquely the
font name.... (we don't care of the size)
-If you subclass GR_CharWidths (like in Win32), please override
GR_Font::newFontWidths() on you subclass

Then in your subclass of GR_Graphics, call
GR_Font::getCharWidthFromCache() and resize it to match the actual font
size. (font size used for caching is
GR_CharWidthsCache::CACHE_FONT_SIZE). This is still font/device unit,
not layout unit (you should do the conversion properly).

Don't hesitate to ask me if you have questions.

New glyph measurment caching
CVS: Modified Files:
CVS: src/af/gr/Makefile src/af/gr/cocoa/gr_CocoaGraphics.h
CVS: src/af/gr/cocoa/gr_CocoaGraphics.mm
CVS: src/af/gr/xp/GNUmakefile.am src/af/gr/xp/Makefile
CVS: src/af/gr/xp/gr_Graphics.cpp src/af/gr/xp/gr_Graphics.h
CVS: Added Files:
CVS: src/af/gr/xp/gr_CharWidthsCache.cpp
CVS: src/af/gr/xp/gr_CharWidthsCache.h

Hub

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