Mercurial > sdl-ios-xcode
view src/video/SDL_cursor_c.h @ 1554:0ca607a5d173
Fixed bug #84
Date: Sun, 23 Oct 2005 16:39:03 +0200
From: "A. Schmid" <sahib@phreaker.net>
Subject: [SDL] no software surfaces with svgalib driver?
Hi,
I noticed that the SDL (1.2.9) svgalib driver only makes use of linear
addressable (framebuffer) video modes. On older systems (like one of
mine), linear addressable modes are often not available.
Especially for cards with VESA VBE < 2.0 the svgalib vesa driver is
unusable, since VESA only supports framebuffering for VBE 2.0 and later.
The changes necessary to add support for software surfaces seem to be
relatively small. I only had to hack src/video/svga/SDL_svgavideo.c (see
attached patch). The code worked fine for me, but it is no more than a
proof of concept and should be reviewed (probably has a memory leak when
switching modes). It also uses the vgagl library (included in the
svgalib package) and needs to be linked against it.
-Alex
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Sun, 19 Mar 2006 12:04:40 +0000 |
parents | d910939febfa |
children | 782fd950bd46 a1b03ba2fcd0 |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2006 Sam Lantinga This library is 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" /* Useful variables and functions from SDL_cursor.c */ #include "SDL_mouse.h" extern int SDL_CursorInit(Uint32 flags); extern void SDL_CursorPaletteChanged(void); extern void SDL_DrawCursor(SDL_Surface *screen); extern void SDL_DrawCursorNoLock(SDL_Surface *screen); extern void SDL_EraseCursor(SDL_Surface *screen); extern void SDL_EraseCursorNoLock(SDL_Surface *screen); extern void SDL_UpdateCursor(SDL_Surface *screen); extern void SDL_ResetCursor(void); extern void SDL_MoveCursor(int x, int y); extern void SDL_CursorQuit(void); #define INLINE_MOUSELOCK #ifdef INLINE_MOUSELOCK /* Inline (macro) versions of the mouse lock functions */ #include "SDL_mutex.h" extern SDL_mutex *SDL_cursorlock; #define SDL_LockCursor() \ do { \ if ( SDL_cursorlock ) { \ SDL_mutexP(SDL_cursorlock); \ } \ } while ( 0 ) #define SDL_UnlockCursor() \ do { \ if ( SDL_cursorlock ) { \ SDL_mutexV(SDL_cursorlock); \ } \ } while ( 0 ) #else extern void SDL_LockCursor(void); extern void SDL_UnlockCursor(void); #endif /* INLINE_MOUSELOCK */ /* Only for low-level mouse cursor drawing */ extern SDL_Cursor *SDL_cursor; extern void SDL_MouseRect(SDL_Rect *area); /* State definitions for the SDL cursor */ #define CURSOR_VISIBLE 0x01 #define CURSOR_USINGSW 0x10 #define SHOULD_DRAWCURSOR(X) \ (((X)&(CURSOR_VISIBLE|CURSOR_USINGSW)) == \ (CURSOR_VISIBLE|CURSOR_USINGSW)) extern volatile int SDL_cursorstate;