Split font engine into font drivers (the Big Font Rewrite)

<gadamopoulos> windows don't use lists

<gadamopoulos> windows use a hashtable

<gadamopoulos> a global one and one per process (that's the PFT)

<gadamopoulos> each font file is cached in the PFT (the font file is the PFF)

<gadamopoulos> and each font file contains multiple faces that are stored in the PFF (the face is the PFE)

<gadamopoulos> PFFs do not have handles

<gadamopoulos> but have timestamps as unique identifiers 

<gadamopoulos> PFEs have handles

<gadamopoulos> all these begin with P because they refer to the physical fonts

<gadamopoulos> there are logical fonts (the LFONT) and the real deal (RFONT)

<gadamopoulos> in trunk these two are entangled

<gadamopoulos> the LFONT has handles meaning that its lifetime is set by its handles

<gadamopoulos> the RFONT doesn't have handles but it dies when the DC object it is associated to dies

<gadamopoulos> the LFONT is more like what the application wishes to use

<gadamopoulos> the RFONT is what ends up in the DC

<gadamopoulos> and the RFONT references a PFE

<gadamopoulos> and the LFONT caches a HPFE

<gadamopoulos> in ros the LFONT has a pointer to what should be called an RFONT

<gadamopoulos> but our RFONT doesn't have all teh info it needs so we always pass the LFONT around

<gadamopoulos> and we don't have something that resembles a PFE because we overly rely on freetype to do the work instead of querying the data of the fontfile and doing the work ourselves afterwards

<gadamopoulos> this is important because we don't support font drivers

<gadamopoulos> Mark_Jansen: timo has implemented two font drivers

<gadamopoulos> and a small part of the code that calls the font driver

<gadamopoulos> this is the font driver:  https://svn.reactos.org/svn/reactos/branches/GSoC_2011/GdiFontDriver/drivers/video/font/ftfd/

<gadamopoulos> and this is the interface it implements: https://svn.reactos.org/svn/reactos/trunk/reactos/win32ss/drivers/font/ftfd/enable.c?revision=66588&view=markup#l10

<gadamopoulos> ftfd stands for freetype font driver

<gadamopoulos> and here is the code that calls it (not complete though): https://svn.reactos.org/svn/reactos/branches/GSoC_2011/GdiFontDriver/subsystems/win32/win32k/font/fntdrvsup.c?revision=56062&view=markup

<gadamopoulos> search for pldev in the last file I pasted to see 

<gadamopoulos> see the whole font folder where the fntdrvsup exists. it is a partial rewrite that was never completed

<gadamopoulos> oh Mark_Jansen, another reason this is important to complete is that right now graphics drivers can't use hardware acceleration to improve the speed we render text