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view src/video/vgl/SDL_vglvideo.h @ 1240:3b8a43c428bb

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From Bug #36: There are a couple of issues with the selection of Altivec alpha-blitting routines in CalculateAlphaBlit() in src/video/SDL_Blit_A.c. 1) There's no check for the presence of Altivec when checking if the Blit32to565PixelAlphaAltivec() routine can be selected. 2) Altivec cannot be used in video memory, and there's no check if the destination surface is a hardware surface. (Alpha-blitting to a hardware surface with GPU support is a bad idea, but somebody's bound to do it anyway.) Patch to fix these attached.
author Ryan C. Gordon <icculus@icculus.org>
date Sun, 08 Jan 2006 21:18:15 +0000
parents e8157fcb3114
children c9b51268668f
line wrap: on
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/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997, 1998, 1999, 2000  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_vglvideo_h
#define _SDL_vglvideo_h

#include <sys/fbio.h>
#include <sys/consio.h>
#include <vgl.h>

#include "SDL_mouse.h"
#include "SDL_mutex.h"
#include "SDL_sysvideo.h"

/* Hidden "this" pointer for the video functions */
#define _THIS	SDL_VideoDevice *this

typedef struct {
	int ModeId;
	int Depth;
	int Rmask;
	int Gmask;
	int Bmask;
	VGLBitmap ModeInfo;
} VGLMode;

/* Private display data */
struct SDL_PrivateVideoData {
#define NUM_MODELISTS	4		/* 8, 16, 24, and 32 bits-per-pixel */
	int SDL_nummodes[NUM_MODELISTS];
	SDL_Rect **SDL_modelist[NUM_MODELISTS];
	SDL_mutex *hw_lock;
	VGLMode *VGLCurMode;
	int flip_page;
	byte *flip_address[2];
};
/* Old variable names */
#define SDL_nummodes	(this->hidden->SDL_nummodes)
#define SDL_modelist	(this->hidden->SDL_modelist)
#define hw_lock		(this->hidden->hw_lock)
#define VGLCurMode	(this->hidden->VGLCurMode)
#define flip_page	(this->hidden->flip_page)
#define flip_address	(this->hidden->flip_address)

#endif /* _SDL_vglvideo_h */