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view test/README @ 689:5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
From: Stephane Marchesin
Subject: Re: [SDL] [patch] MMX alpha blit patches with MMX detection
I think everything is correct now. I've done as much testing as I could,
but some real-world testing wouldn't hurt, I think.
The patch is here : http://icps.u-strasbg.fr/~marchesin/sdl_mmxblit.patch
If you do byte-by-byte comparison of the output between C and MMX
functions, you'll notice that the results for 555 and 565 RGB alpha
blits aren't exactly the same. This is because MMX functions for 555 and
565 RGB have an higher accuracy. If you want the exact same behaviour
that's possible by masking the three lower alpha bits in the MMX
functions. Just ask !
I removed one MMX function because after I fixed it to match its C
equivalent, it revealed to be slower than the C version on a PIII
(although a bit faster on an Athlon XP).
I've also added MMX and PIII replacements for SDL_memcpy. Those provide
some speed up in testvidinfo -benchmark (at least for me, under linux &
X11).
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Fri, 22 Aug 2003 05:51:19 +0000 |
| parents | 74212992fb08 |
| children | 05c551e5bc64 |
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These are test programs for the SDL library: testver Check the version and dynamic loading and endianness testtypes Check to see if the data types are the correct size testhread Hacked up test of multi-threading testlock Hacked up test of multi-threading and locking testerror Tests multi-threaded error handling testsem Tests SDL's semaphore implementation testtimer Test the timer facilities loopwave Audio test -- loop playing a WAV file testcdrom Sample audio CD control program testkeys List the available keyboard keys testvidinfo Show the pixel format of the display checkkeys Watch the key events to check the keyboard testwin Display a BMP image at various depths graywin Display a gray gradient and center mouse on spacebar testsprite Example of fast sprite movement on the screen testbitmap Test displaying 1-bit bitmaps testalpha Display an alpha faded icon -- paint with mouse testwm Test window manager -- title, icon, events threadwin Test multi-threaded event handling testgl A very simple example of using OpenGL with SDL testjoystick List joysticks and watch joystick events