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Fixed bug #15 SDL_blit_A.mmx-speed.patch.txt -- Speed improvements and a bugfix for the current GCC inline mmx asm code: - Changed some ops and removed some resulting useless ones. - Added some instruction parallelism (some gain) The resulting speed on my Xeon improved upto 35% depending on the function (measured in fps). - Fixed a bug where BlitRGBtoRGBSurfaceAlphaMMX() was setting the alpha component on the destination surfaces (to opaque-alpha) even when the surface had none. SDL_blit_A.mmx-msvc.patch.txt -- MSVC mmx intrinsics version of the same GCC asm code. MSVC compiler tries to parallelize the code and to avoid register stalls, but does not always do a very good job. Per-surface blending MSVC functions run quite a bit faster than their pure-asm counterparts (upto 55% faster for 16bit ones), but the per-pixel blending runs somewhat slower than asm. - BlitRGBtoRGBSurfaceAlphaMMX and BlitRGBtoRGBPixelAlphaMMX (and all variants) can now also handle formats other than (A)RGB8888. Formats like RGBA8888 and some quite exotic ones are allowed -- like RAGB8888, or actually anything having channels aligned on 8bit boundary and full 8bit alpha (for per-pixel alpha blending). The performance cost of this change is virtually 0 for per-surface alpha blending (no extra ops inside the loop) and a single non-MMX op inside the loop for per-pixel blending. In testing, the per-pixel alpha blending takes a ~2% performance hit, but it still runs much faster than the current code in CVS. If necessary, a separate function with this functionality can be made. This code requires Processor Pack for VC6.
author Sam Lantinga <slouken@libsdl.org>
date Wed, 15 Mar 2006 15:39:29 +0000
parents bb6839704ed6
children 782fd950bd46 a6f635e5eaa6
line wrap: on
line source


#ifndef _directx_h
#define _directx_h

/* Include all of the DirectX 5.0 headers and adds any necessary tweaks */

#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <mmsystem.h>
#ifndef WIN32
#define WIN32
#endif
#undef  WINNT

/* Far pointers don't exist in 32-bit code */
#ifndef FAR
#define FAR
#endif

/* Error codes not yet included in Win32 API header files */
#ifndef MAKE_HRESULT
#define MAKE_HRESULT(sev,fac,code) \
	((HRESULT)(((unsigned long)(sev)<<31) | ((unsigned long)(fac)<<16) | ((unsigned long)(code))))
#endif

#ifndef S_OK
#define S_OK		(HRESULT)0x00000000L
#endif

#ifndef SUCCEEDED
#define SUCCEEDED(x)	((HRESULT)(x) >= 0)
#endif
#ifndef FAILED
#define FAILED(x)	((HRESULT)(x)<0)
#endif

#ifndef E_FAIL
#define E_FAIL		(HRESULT)0x80000008L
#endif
#ifndef E_NOINTERFACE
#define E_NOINTERFACE	(HRESULT)0x80004002L
#endif
#ifndef E_OUTOFMEMORY
#define E_OUTOFMEMORY	(HRESULT)0x8007000EL
#endif
#ifndef E_INVALIDARG
#define E_INVALIDARG	(HRESULT)0x80070057L
#endif
#ifndef E_NOTIMPL
#define E_NOTIMPL	(HRESULT)0x80004001L
#endif
#ifndef REGDB_E_CLASSNOTREG
#define REGDB_E_CLASSNOTREG	(HRESULT)0x80040154L
#endif

/* Severity codes */
#ifndef SEVERITY_ERROR
#define SEVERITY_ERROR	1
#endif

/* Error facility codes */
#ifndef FACILITY_WIN32
#define FACILITY_WIN32	7
#endif

#ifndef FIELD_OFFSET
#define FIELD_OFFSET(type, field)    ((LONG)&(((type *)0)->field))
#endif

/* DirectX headers (if it isn't included, I haven't tested it yet)
 */
/* We need these defines to mark what version of DirectX API we use */
#define DIRECTDRAW_VERSION  0x0700
#define DIRECTSOUND_VERSION 0x0500
#define DIRECTINPUT_VERSION 0x0500

#ifdef __GNUC__
#define NONAMELESSUNION
#endif
#include <ddraw.h>
#include <dsound.h>
#include <dinput.h>

#endif /* _directx_h */