Mercurial > sdl-ios-xcode
view src/video/gem/SDL_gemvideo.h @ 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 | 0ce5a68278fd |
children | 028e03e273c8 |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; if not, write to the Free Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Sam Lantinga slouken@libsdl.org */ #ifdef SAVE_RCSID static char rcsid = "@(#) $Id$"; #endif #ifndef _SDL_gemvideo_h #define _SDL_gemvideo_h #include "SDL_sysvideo.h" #include "SDL_mutex.h" /* Hidden "this" pointer for the video functions */ #define _THIS SDL_VideoDevice *this /* Functions prototypes */ void GEM_wind_redraw(_THIS, int winhandle, short *inside); /* Private display data */ #define SDL_NUMMODES 1 /* Fullscreen */ struct SDL_PrivateVideoData { /* VDI infos */ short vdi_handle; /* VDI handle */ short full_w, full_h; /* Fullscreen size */ int bpp; /* Colour depth */ int pixelsize; /* Bytes per pixel */ Uint16 old_numcolors; /* Number of colors in saved palette */ Uint16 old_palette[256][3]; /* Saved current palette */ Uint16 pitch; /* Line length */ int format; /* Screen format */ void *screen; /* Screen address */ Uint32 red, green, blue, alpha; /* Screen components */ Uint32 screensize; MFDB src_mfdb, dst_mfdb; /* VDI MFDB for bitblt */ short blit_coords[8]; /* Coordinates for bitblt */ /* GEM infos */ short desk_x, desk_y; /* Desktop properties */ short desk_w, desk_h; short win_handle; /* Our window handle */ void *buffer; /* Our shadow buffer */ int window_type; /* Window type */ const char *title_name; /* Window title */ const char *icon_name; /* Icon title */ short version; /* AES version */ short wfeatures; /* AES window features */ SDL_bool window_fulled; /* Window maximized ? */ SDL_bool mouse_relative; /* Report relative mouse movement */ SDL_bool locked; /* AES locked for fullscreen ? */ SDL_Rect *SDL_modelist[SDL_NUMMODES+1]; /* Mode list */ }; /* Hidden structure -> variables names */ #define VDI_handle (this->hidden->vdi_handle) #define VDI_w (this->hidden->full_w) #define VDI_h (this->hidden->full_h) #define VDI_bpp (this->hidden->bpp) #define VDI_pixelsize (this->hidden->pixelsize) #define VDI_oldnumcolors (this->hidden->old_numcolors) #define VDI_oldpalette (this->hidden->old_palette) #define VDI_pitch (this->hidden->pitch) #define VDI_format (this->hidden->format) #define VDI_screen (this->hidden->screen) #define VDI_redmask (this->hidden->red) #define VDI_greenmask (this->hidden->green) #define VDI_bluemask (this->hidden->blue) #define VDI_alphamask (this->hidden->alpha) #define VDI_screensize (this->hidden->screensize) #define VDI_src_mfdb (this->hidden->src_mfdb) #define VDI_dst_mfdb (this->hidden->dst_mfdb) #define VDI_blit_coords (this->hidden->blit_coords) #define GEM_desk_x (this->hidden->desk_x) #define GEM_desk_y (this->hidden->desk_y) #define GEM_desk_w (this->hidden->desk_w) #define GEM_desk_h (this->hidden->desk_h) #define GEM_handle (this->hidden->win_handle) #define GEM_buffer (this->hidden->buffer) #define GEM_win_type (this->hidden->window_type) #define GEM_title_name (this->hidden->title_name) #define GEM_icon_name (this->hidden->icon_name) #define GEM_version (this->hidden->version) #define GEM_wfeatures (this->hidden->wfeatures) #define GEM_win_fulled (this->hidden->window_fulled) #define GEM_mouse_relative (this->hidden->mouse_relative) #define GEM_locked (this->hidden->locked) #define SDL_modelist (this->hidden->SDL_modelist) #endif /* _SDL_gemvideo_h */