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annotate src/video/xbios/SDL_xbios.h @ 978:3b1ba22f5a28

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Add support for OpenGL on Atari using OSMesa, the offscreen rendering driver from Mesa
author Patrice Mandin <patmandin@gmail.com>
date Wed, 17 Nov 2004 23:13:15 +0000
parents b8d311d90021
children 475166d13b44
rev   line source
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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
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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 Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 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 Library 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 Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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
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23 #ifdef SAVE_RCSID
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24 static char rcsid =
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25 "@(#) $Id$";
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26 #endif
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27
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28 #ifndef _SDL_xbios_h
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29 #define _SDL_xbios_h
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30
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31 #ifdef HAVE_OPENGL
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32 #include <GL/osmesa.h>
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33 #endif
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34
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35 #include "SDL_types.h"
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36 #include "SDL_sysvideo.h"
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37
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38 /* Hidden "this" pointer for the video functions */
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39 #define _THIS SDL_VideoDevice *this
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40
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41 /* TT video modes: 2
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42 Falcon RVB: 16 (could be *2 by adding PAL/NTSC modes)
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43 Falcon VGA: 6
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44 ST low: 1
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45 */
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46 #define SDL_NUMMODES 16
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47
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48 typedef struct
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49 {
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50 Uint16 number; /* Video mode number */
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51 Uint16 width; /* Size */
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52 Uint16 height;
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53 Uint16 depth; /* bits per plane */
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54 SDL_bool doubleline; /* Double the lines ? */
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55 } xbiosmode_t;
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56
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57 /* Private display data */
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58 #define NUM_MODELISTS 2 /* 8 and 16 bits-per-pixel */
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59
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60 struct SDL_PrivateVideoData {
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61 long cookie_vdo;
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62 int old_video_mode; /* Old video mode before entering SDL */
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63 void *old_video_base; /* Old pointer to screen buffer */
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64 void *old_palette; /* Old palette */
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65 Uint32 old_num_colors; /* Nb of colors in saved palette */
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66 int num_modes; /* Number of xbios video modes */
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67 xbiosmode_t *mode_list; /* List of xbios video modes */
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68
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69 void *screens[2]; /* Pointers to aligned screen buffer */
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70 void *screensmem[2]; /* Pointers to screen buffer */
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71 void *shadowscreen; /* Shadow screen for c2p conversion */
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72 int doubleline; /* Double line mode ? */
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73 int frame_number; /* Number of frame for double buffer */
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74 int pitch; /* Destination line width for C2P */
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75 int width, height; /* Screen size for centered C2P */
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76 #ifdef HAVE_OPENGL
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77 OSMesaContext ctx; /* OpenGL OSMesa context */
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78 #endif
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79
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80 SDL_Rect *SDL_modelist[NUM_MODELISTS][SDL_NUMMODES+1];
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81 xbiosmode_t *videomodes[NUM_MODELISTS][SDL_NUMMODES+1];
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82 };
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83
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84 /* _VDO cookie values */
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85 enum {
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86 VDO_ST=0,
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87 VDO_STE,
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88 VDO_TT,
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89 VDO_F30
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90 };
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91
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92 /* Monitor types */
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93 enum {
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94 MONITOR_MONO=0,
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95 MONITOR_TV,
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96 MONITOR_VGA,
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97 MONITOR_RGB
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98 };
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99
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100 /* EgetShift masks */
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101 #define ES_BANK 0x000f
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102 #define ES_MODE 0x0700
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103 #define ES_GRAY 0x1000
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104 #define ES_SMEAR 0x8000
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105
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106 /* TT shifter modes */
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107 #define ST_LOW 0x0000
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108 #define ST_MED 0x0100
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109 #define ST_HIGH 0x0200
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110 #define TT_LOW 0x0700
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111 #define TT_MED 0x0300
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112 #define TT_HIGH 0x0600
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113
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114 /* Hidden structure -> variables names */
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115 #define SDL_modelist (this->hidden->SDL_modelist)
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116 #define XBIOS_mutex (this->hidden->mutex)
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117 #define XBIOS_cvdo (this->hidden->cookie_vdo)
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118 #define XBIOS_oldpalette (this->hidden->old_palette)
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119 #define XBIOS_oldnumcol (this->hidden->old_num_colors)
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120 #define XBIOS_oldvbase (this->hidden->old_video_base)
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121 #define XBIOS_oldvmode (this->hidden->old_video_mode)
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122 #define XBIOS_nummodes (this->hidden->num_modes)
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123 #define XBIOS_modelist (this->hidden->mode_list)
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124 #define XBIOS_screens (this->hidden->screens)
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125 #define XBIOS_screensmem (this->hidden->screensmem)
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126 #define XBIOS_shadowscreen (this->hidden->shadowscreen)
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127 #define XBIOS_videomodes (this->hidden->videomodes)
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128 #define XBIOS_doubleline (this->hidden->doubleline)
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129 #define XBIOS_fbnum (this->hidden->frame_number)
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130 #define XBIOS_pitch (this->hidden->pitch)
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131 #define XBIOS_width (this->hidden->width)
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132 #define XBIOS_height (this->hidden->height)
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133 #ifdef HAVE_OPENGL
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134 #define XBIOS_ctx (this->hidden->ctx)
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135 #endif
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136
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137 #endif /* _SDL_xbios_h */