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[PATCH] SDL_GetVideoMode() do not find the best video mode The current GetVideoMode() function stops at the first mode which has any dimensions smaller than the one asked, and gives the previous in the list. If I ask 336x224 with this list: 768x480 768x240 640x400 640x200 384x480 384x240 320x400 320x200 SDL will give me 640x400, because 640x200 as height smaller than what I asked. However the best mode is the smaller which has both dimensions bigger than the one asked (384x240 in my example). This patch fixes this, plus it does not rely on a sorted video mode list.
author Patrice Mandin <patmandin@gmail.com>
date Sun, 12 Jun 2005 16:12:55 +0000
parents c6ed27c7d47d
children d910939febfa
line wrap: on
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/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2004 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
*/

/*
	ScreenBlaster 3 definitions

	Patrice Mandin
*/

#ifndef _SDL_xbios_sb3_h_
#define _SDL_xbios_sb3_h_

/*--- Defines ---*/

#ifndef C_SCPN
#define C_SCPN 0x5343504EL
#endif

#define SCPN_DEV_1BPP	0
#define SCPN_DEV_2BPP	1
#define SCPN_DEV_4BPP	2
#define SCPN_DEV_8BPP	3
#define SCPN_DEV_16BPP	4

extern const int SDL_XBIOS_scpn_planes_device[];

/*--- Types ---*/

typedef struct {
	unsigned short	virtual_width;	/* Virtual screen width */
	unsigned short	virtual_height;	/* Virtual screen height */
	unsigned short	visible_width;	/* Visible width */
	unsigned short	visible_height;	/* Visible height */
	unsigned short	h_pos;	/* Horizontal position in virtual screen */
	unsigned short	v_pos;	/* Vertical position in virtual screen */
	unsigned short	dummy;
	unsigned long	size;	/* Size of screen in bytes */
	unsigned short	device;	/* Device number to find planes = getRez() */
							/* = Index in scpn_planes_device[] */
} __attribute__((packed)) scpn_screeninfo_t;

typedef struct {
	unsigned long	magic;	/* just a BRA assembler jump */
	unsigned short	version;
	void			*dummy1;
	unsigned short	ptsout0_1;
	unsigned short	ptsout0_2;
	unsigned short	dummy3;
	unsigned char	date[8];	/* Date of program build */
	unsigned char	asm_string[30];	/* 10 times the 'ASM' string */
	unsigned short	dummy4;
	scpn_screeninfo_t	*screen_info;
	unsigned short	dummy6;
} __attribute__((packed)) scpn_cookie_t;

/*--- Function prototypes ---*/

int SDL_XBIOS_SB3Usable(scpn_cookie_t *cookie_scpn);

void SDL_XBIOS_SB3Init(_THIS, scpn_cookie_t *cookie_scpn);

#endif /* _SDL_xbios_sb3_h_ */