view src/cdrom/SDL_syscdrom.h @ 4168:69bcba65c388 SDL-1.2

Fixed bug #526 Comment #1 From Simon Howard 2009-03-20 16:50:56 Hi, I'm the author of Chocolate Doom, one of the other source ports that James mentioned. This is a patch against the current SVN version of SDL 1.2 that fixes the bug. It has been tested and hopefully should be obviously correct from examining the changes. I'll give a brief explanation. When the palette is set with SDL_SetPalette, the IDirectDrawPalette_SetEntries DirectX function is invoked. However, when this happens, a WM_PALETTECHANGED message is sent to the window. A WM_PALETTECHANGED message can also be received if the palette is changed for some other reason, like if the system palette is changed. Therefore, the palette change handler (DX5_PaletteChanged) has code to deal with this case. It distinguishes "expected" palette changes (set with SDL_SetPalette) from "unexpected" palette changes using the colorchange_expected variable, which is set before calling IDirectDrawPalette_SetEntries. However, the code to set this variable is missing in the fullscreen code path. By setting this variable, the palette change is handled properly and the freezes go away.
author Sam Lantinga <slouken@libsdl.org>
date Mon, 13 Apr 2009 00:53:12 +0000
parents a1b03ba2fcd0
children
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/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2009 Sam Lantinga

    This library is SDL_free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Sam Lantinga
    slouken@libsdl.org
*/
#include "SDL_config.h"

/* This is the system specific header for the SDL CD-ROM API */

/* Structure of CD audio control functions */
extern struct CDcaps {
	/* Get the name of the specified drive */
	const char *(*Name)(int drive);

	/* Open the specified drive, returning a drive id, or -1 on error */
	int (*Open)(int drive);

	/* Get table-of-contents (number of tracks + track info) for disk.
	   The TOC information should be stored in the cdrom structure.
	   This function should return 0 on success, or -1 on error.
	 */
	int (*GetTOC)(SDL_CD *cdrom);

	/* Return the current status and play position, in frames, of the
	   drive.  'position' may be NULL, and if so, should be ignored.
	 */
	CDstatus (*Status)(SDL_CD *cdrom, int *position);

	/* Play from frame 'start' to 'start+len' */
	int (*Play)(SDL_CD *cdrom, int start, int len); 

	/* Pause play */
	int (*Pause)(SDL_CD *cdrom);

	/* Resume play */
	int (*Resume)(SDL_CD *cdrom);

	/* Stop play */
	int (*Stop)(SDL_CD *cdrom);

	/* Eject the current disk */
	int (*Eject)(SDL_CD *cdrom);

	/* Close the specified drive */
	void (*Close)(SDL_CD *cdrom);
} SDL_CDcaps;

/* The number of available CD-ROM drives on the system */
extern int SDL_numcds;

/* Function to scan the system for CD-ROM drives and fill SDL_CDcaps.
 * This function should set SDL_numcds to the number of available CD
 * drives.  Drive 0 should be the system default CD-ROM.
 * It should return 0, or -1 on an unrecoverable fatal error.
*/
extern int  SDL_SYS_CDInit(void);

/* Function to perform any system-specific CD-ROM related cleanup */
extern void SDL_SYS_CDQuit(void);