src/video/x11/SDL_x11dga.c
author Sam Lantinga <slouken@libsdl.org>
Sun, 28 May 2006 13:04:16 +0000
branchSDL-1.3
changeset 1662 782fd950bd46
parent 1402 d910939febfa
child 1668 4da1ee79c9af
permissions -rw-r--r--
Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.

WARNING: None of the video drivers have been updated for the new API yet! The API is still under design and very fluid.

The code is now run through a consistent indent format:
indent -i4 -nut -nsc -br -ce

The headers are being converted to automatically generate doxygen documentation.
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/*
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    SDL - Simple DirectMedia Layer
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    Copyright (C) 1997-2006 Sam Lantinga
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    This library is free software; you can redistribute it and/or
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    modify it under the terms of the GNU Lesser General Public
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    License as published by the Free Software Foundation; either
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    version 2.1 of the License, or (at your option) any later version.
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    This library is distributed in the hope that it will be useful,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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    Lesser General Public License for more details.
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    You should have received a copy of the GNU Lesser General Public
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    License along with this library; if not, write to the Free Software
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    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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    Sam Lantinga
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    slouken@libsdl.org
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*/
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#include "SDL_config.h"
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/* This is currently only used to enable DGA mouse.
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   The new fullscreen code makes it very difficult to handle DGA dynamically.
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   There will be a completely separate DGA driver that is fullscreen-only.
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*/
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#include "SDL_video.h"
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#include "../SDL_cursor_c.h"
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#include "SDL_x11dga_c.h"
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/* Global for the error handler */
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int dga_event, dga_error = -1;
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void
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X11_EnableDGAMouse (_THIS)
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{
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#if SDL_VIDEO_DRIVER_X11_DGAMOUSE
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    int dga_major, dga_minor;
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    int use_dgamouse;
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    const char *env_use_dgamouse;
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    /* Check configuration to see if we should use DGA mouse */
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    use_dgamouse = 1;
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    env_use_dgamouse = SDL_getenv ("SDL_VIDEO_X11_DGAMOUSE");
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    if (env_use_dgamouse) {
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        use_dgamouse = atoi (env_use_dgamouse);
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    }
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    /* Check for buggy X servers */
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    if (use_dgamouse && BUGGY_XFREE86 ( ==, 4000)) {
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        use_dgamouse = 0;
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    }
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    /* Only use DGA mouse if the cursor is not showing (in relative mode) */
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    if (use_dgamouse && local_X11 && !(using_dga & DGA_MOUSE) &&
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        SDL_NAME (XF86DGAQueryExtension) (SDL_Display, &dga_event, &dga_error)
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        && SDL_NAME (XF86DGAQueryVersion) (SDL_Display, &dga_major,
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                                           &dga_minor)) {
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        if (SDL_NAME (XF86DGADirectVideo)
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            (SDL_Display, SDL_Screen, XF86DGADirectMouse)) {
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            using_dga |= DGA_MOUSE;
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        }
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    }
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#endif /* SDL_VIDEO_DRIVER_X11_DGAMOUSE */
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}
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/* Argh.  Glide resets DGA mouse mode when it makes the context current! */
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void
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X11_CheckDGAMouse (_THIS)
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{
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#if SDL_VIDEO_DRIVER_X11_DGAMOUSE
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    int flags;
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    if (using_dga & DGA_MOUSE) {
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        SDL_NAME (XF86DGAQueryDirectVideo) (SDL_Display, SDL_Screen, &flags);
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        if (!(flags & XF86DGADirectMouse)) {
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            SDL_NAME (XF86DGADirectVideo) (SDL_Display, SDL_Screen,
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                                           XF86DGADirectMouse);
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        }
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    }
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#endif
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}
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void
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X11_DisableDGAMouse (_THIS)
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{
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#if SDL_VIDEO_DRIVER_X11_DGAMOUSE
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    if (using_dga & DGA_MOUSE) {
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        SDL_NAME (XF86DGADirectVideo) (SDL_Display, SDL_Screen, 0);
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        using_dga &= ~DGA_MOUSE;
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    }
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#endif /* SDL_VIDEO_DRIVER_X11_DGAMOUSE */
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}
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