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annotate src/video/nanox/SDL_nxvideo.h @ 1555:780fd5b61df1

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Fixed bug #89 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 12:05:16 +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) 1997-2004 Sam Lantinga
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4 Copyright (C) 2001 Hsieh-Fu Tsai
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5
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6 This library is free software; you can redistribute it and/or
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7 modify it under the terms of the GNU Library General Public
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8 License as published by the Free Software Foundation; either
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9 version 2 of the License, or (at your option) any later version.
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10
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11 This library is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 Library General Public License for more details.
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15
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16 You should have received a copy of the GNU Library General Public
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17 License along with this library; if not, write to the Free
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18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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20 Sam Lantinga
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21 slouken@libsdl.org
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23 Hsieh-Fu Tsai
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24 clare@setabox.com
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25 */
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26 #include "SDL_config.h"
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27
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28 #ifndef _SDL_nxvideo_h
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29 #define _SDL_nxvideo_h
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30
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31 #include <microwin/nano-X.h>
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32
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33 #include "../SDL_sysvideo.h"
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34
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35 #ifdef ENABLE_NANOX_DEBUG
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36 #define Dprintf printf
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37 #else
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38 #define Dprintf(ignore...)
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39 #endif
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40
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41 // Hidden "this" pointer for the video functions
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42 #define _THIS SDL_VideoDevice * this
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43
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44 // Private display data
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45 typedef struct NX_SDL_VISUAL {
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46 int bpp ;
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47 Uint32 red_mask ;
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48 Uint32 green_mask ;
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49 Uint32 blue_mask ;
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50 } nx_sdl_visual_t ;
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51
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52 struct SDL_PrivateVideoData {
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53 GR_WINDOW_ID SDL_Window ;
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54 GR_WINDOW_ID FSwindow ;
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55 // Flag: true if we have been passed a window
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56 char * SDL_windowid ;
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57 GR_GC_ID GC ;
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58 unsigned char * Image ;
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59 unsigned char * Image_buff ; /* for GrArea*/
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60 unsigned char * Clientfb; /* for DirectFB*/
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61 nx_sdl_visual_t SDL_Visual ;
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62 // The current list of available video modes
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63 SDL_Rect ** modelist ;
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64 int currently_fullscreen ;
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65 // for fullscreen
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66 int OffsetX, OffsetY ;
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67 // for GammaRamp
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68 Uint16 * GammaRamp_R, * GammaRamp_G, * GammaRamp_B ;
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69 // for GrArea, r_mask, g_mask, b_mask
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70 int pixel_type ;
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71 #ifdef ENABLE_NANOX_DIRECT_FB
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72 GR_WINDOW_FB_INFO fbinfo;
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73 #endif
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74 } ;
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75
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76 #define SDL_Window (this -> hidden -> SDL_Window)
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77 #define FSwindow (this -> hidden -> FSwindow)
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78 #define SDL_windowid (this -> hidden -> SDL_windowid)
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79 #define SDL_GC (this -> hidden -> GC)
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80 #define SDL_Image (this -> hidden -> Image)
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81 #define Image_buff (this -> hidden -> Image_buff)
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82 #define Clientfb (this -> hidden -> Clientfb)
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83 #define SDL_Visual (this -> hidden -> SDL_Visual)
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84 #define SDL_modelist (this -> hidden -> modelist)
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85 #define currently_fullscreen (this -> hidden -> currently_fullscreen)
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86 #define OffsetX (this -> hidden -> OffsetX)
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87 #define OffsetY (this -> hidden -> OffsetY)
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88 #define GammaRamp_R (this -> hidden -> GammaRamp_R)
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89 #define GammaRamp_G (this -> hidden -> GammaRamp_G)
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90 #define GammaRamp_B (this -> hidden -> GammaRamp_B)
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91 #define pixel_type (this -> hidden -> pixel_type)
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92 #define fbinfo (this -> hidden -> fbinfo)
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94 #define CI_SIZE 256 // color index size
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96 #endif // _SDL_nxvideo_h