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annotate src/video/ataricommon/SDL_xbiosevents.c @ 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 c121d94672cb be01e0b82dca
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 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 /*
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25 * XBIOS mouse & joystick vectors
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26 *
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27 * Patrice Mandin
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28 */
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29
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30 #include <mint/osbind.h>
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31
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32 #include "../../events/SDL_events_c.h"
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33 #include "SDL_xbiosevents_c.h"
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34 #include "SDL_xbiosinterrupt_s.h"
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35
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36 /* Variables */
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37
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38 int SDL_AtariXbios_enabled=0;
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39
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40 /* Local variables */
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41
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42 static _KBDVECS *kbdvecs; /* Pointer to access system vectors */
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43 static Uint16 atari_prevmouseb; /* buttons */
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44
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45 /* Functions */
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46
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47 void SDL_AtariXbios_InstallVectors(int vectors_mask)
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48 {
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49 void *oldpile;
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50
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51 /* Clear variables */
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52 SDL_AtariXbios_mouseb =
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53 SDL_AtariXbios_mousex =
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54 SDL_AtariXbios_mousey =
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55 SDL_AtariXbios_joystick =
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56 atari_prevmouseb = 0;
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57
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58 if (vectors_mask==0) {
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59 SDL_AtariXbios_enabled=0;
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60 return;
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61 }
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62
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63 /* Read IKBD vectors base */
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64 kbdvecs=Kbdvbase();
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65
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66 /* Go to supervisor mode */
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67 oldpile=(void *)Super(0);
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68
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69 /* Install our vectors */
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70 SDL_AtariXbios_Install(
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71 kbdvecs,
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72 (vectors_mask & ATARI_XBIOS_MOUSEEVENTS) ? SDL_AtariXbios_MouseVector : NULL,
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73 (vectors_mask & ATARI_XBIOS_JOYSTICKEVENTS) ? SDL_AtariXbios_JoystickVector : NULL
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74 );
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75
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76 /* Back to user mode */
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77 Super(oldpile);
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78
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79 SDL_AtariXbios_enabled=1;
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80 }
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81
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82 void SDL_AtariXbios_RestoreVectors(void)
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83 {
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84 void *oldpile;
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85
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86 if (SDL_AtariXbios_enabled==0) {
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87 return;
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88 }
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89
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90 /* Read IKBD vectors base */
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91 kbdvecs=Kbdvbase();
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92
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93 /* Go to supervisor mode */
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94 oldpile=(void *)Super(NULL);
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95
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96 /* Reinstall system vector */
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97 SDL_AtariXbios_Restore(kbdvecs);
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98
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99 /* Back to user mode */
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100 Super(oldpile);
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101 }
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102
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103 static int atari_GetButton(int button)
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104 {
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105 switch(button)
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106 {
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107 case 0:
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108 return SDL_BUTTON_RIGHT;
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109 break;
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110 case 1:
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111 default:
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112 return SDL_BUTTON_LEFT;
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113 break;
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114 }
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115 }
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116
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117 void SDL_AtariXbios_PostMouseEvents(_THIS, SDL_bool buttonEvents)
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118 {
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119 if (SDL_AtariXbios_enabled==0) {
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120 return;
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121 }
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122
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123 /* Mouse motion ? */
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124 if (SDL_AtariXbios_mousex || SDL_AtariXbios_mousey) {
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125 SDL_PrivateMouseMotion(0, 1, SDL_AtariXbios_mousex, SDL_AtariXbios_mousey);
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126 SDL_AtariXbios_mousex = SDL_AtariXbios_mousey = 0;
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127 }
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128
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129 /* Mouse button ? */
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130 if (buttonEvents && (SDL_AtariXbios_mouseb != atari_prevmouseb)) {
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131 int i;
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132
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133 for (i=0;i<2;i++) {
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134 int curbutton, prevbutton;
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135
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136 curbutton = SDL_AtariXbios_mouseb & (1<<i);
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137 prevbutton = atari_prevmouseb & (1<<i);
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138
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139 if (curbutton && !prevbutton) {
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140 SDL_PrivateMouseButton(SDL_PRESSED, atari_GetButton(i), 0, 0);
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141 }
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e9278438fb3b Date: Thu, 04 Apr 2002 13:27:36 GMT+1
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142 if (!curbutton && prevbutton) {
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143 SDL_PrivateMouseButton(SDL_RELEASED, atari_GetButton(i), 0, 0);
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144 }
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145 }
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146 atari_prevmouseb = SDL_AtariXbios_mouseb;
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147 }
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148 }