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
line wrap: on
line source

/*
    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 */