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Software Screen to Screen BitBlt Acceleration GRADD filter, r0.0.3
This is a small filter GRADD driver that can intercept some sort of 'Screen to Screen' BitBlt software emulation responses from GHI layer, and will process such responses by its own faster blitter. - both source and destination are VRAM - source-copy raster operation, with no pattern, no transparency, no stretching and no clipping This simple, assembler- coded, MMX / SSEint-ready blitter is heavy optimized for uncached memory reads and write-combined memory writes, designed in order to eliminate unnecessary, much slower peripheral bus cycles as much as possible. Typically, such slower software BitBlt emulations may speed up to 1.5x ~ 2.5x. Highly recommended for GENGRADD or poor-accelerated GHI (such as M64GRADD in 24bpp, INTGRADD and so on) users.
Takayuki 'January June' Suwa (email@example.com)
OS/2 v3.x with FP35+, OS/2 v4.0 with FP5+, WSeB, MCP, ACP or eCS
Any GRADD-based display drivers, build E.083 equivalent or later
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