Add text rendering support via the Windows 3.x ExtTextOut DDI function.
Builds a .FNT v3 font structure from the VGA BIOS 8x16 ROM font
(INT 10h AH=11h), with v3 char table (6-byte entries, absolute offsets)
required by VBESVGA.DRV's BigFontFlags in protected mode. Provides a
full-screen clip rect since STRBLT.ASM unconditionally dereferences
lpClipRect. Tested with both VBESVGA.DRV and S3TRIO.DRV.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Add comprehensive README covering architecture, API usage, build
instructions, tested drivers, binary patching details, and DGROUP
layout. Expand file header comments in all library sources and headers
to document module responsibilities, data flow, and key constraints.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
