Mercurial > sdl-ios-xcode
annotate src/video/riscos/SDL_riscosvideo.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> |
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date | Sun, 19 Mar 2006 12:04:40 +0000 |
parents | d910939febfa |
children | 782fd950bd46 a1b03ba2fcd0 |
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1 /* |
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2 SDL - Simple DirectMedia Layer |
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3 Copyright (C) 1997-2006 Sam Lantinga |
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4 |
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5 This library is free software; you can redistribute it and/or |
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6 modify it under the terms of the GNU Lesser General Public |
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7 License as published by the Free Software Foundation; either |
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8 version 2.1 of the License, or (at your option) any later version. |
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9 |
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10 This library is distributed in the hope that it will be useful, |
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 Lesser General Public License for more details. |
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14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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18 |
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19 Sam Lantinga |
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20 slouken@libsdl.org |
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21 */ |
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22 #include "SDL_config.h" |
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23 |
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24 #ifndef _SDL_riscosvideo_h |
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25 #define _SDL_riscosvideo_h |
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26 |
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27 #include "SDL_mouse.h" |
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28 #include "SDL_mutex.h" |
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29 #include "../SDL_sysvideo.h" |
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30 |
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31 /* Hidden "this" pointer for the video functions */ |
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32 #define _THIS SDL_VideoDevice *this |
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33 |
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34 |
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35 /* Private display data */ |
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36 |
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37 struct SDL_PrivateVideoData { |
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38 unsigned char *bank[2]; |
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39 int current_bank; |
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40 unsigned char *alloc_bank; |
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41 int height; |
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42 int xeig; |
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43 int yeig; |
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44 int screen_bpp; |
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45 int screen_width; |
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46 int screen_height; |
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47 char *pixtrans; |
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48 |
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49 /* Wimp variables */ |
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50 unsigned int window_handle; |
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51 char title[256]; |
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52 |
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53 #define NUM_MODELISTS 4 /* 8, 16, 24, and 32 bits-per-pixel */ |
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54 int SDL_nummodes[NUM_MODELISTS]; |
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55 SDL_Rect **SDL_modelist[NUM_MODELISTS]; |
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56 }; |
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57 |
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58 /* Old variable names */ |
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59 #define SDL_nummodes (this->hidden->SDL_nummodes) |
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60 #define SDL_modelist (this->hidden->SDL_modelist) |
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61 |
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62 #endif /* _SDL_risosvideo_h */ |