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0
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001 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@devolution.com
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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 /* SVGAlib based SDL video driver implementation.
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29 */
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30
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31 #include <stdlib.h>
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32 #include <stdio.h>
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33 #include <unistd.h>
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34 #include <sys/stat.h>
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35
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36 #if defined(linux)
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37 #include <linux/vt.h>
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38 #elif defined(__FreeBSD__)
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39 #include <sys/consio.h>
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40 #else
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41 #error You must choose your operating system here
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42 #endif
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43 #include <vga.h>
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44 #include <vgamouse.h>
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45 #include <vgakeyboard.h>
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46
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47 #include "SDL.h"
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48 #include "SDL_error.h"
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49 #include "SDL_video.h"
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50 #include "SDL_mouse.h"
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51 #include "SDL_sysvideo.h"
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52 #include "SDL_pixels_c.h"
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53 #include "SDL_events_c.h"
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54 #include "SDL_svgavideo.h"
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55 #include "SDL_svgaevents_c.h"
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56 #include "SDL_svgamouse_c.h"
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57
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58
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59 /* Initialization/Query functions */
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60 static int SVGA_VideoInit(_THIS, SDL_PixelFormat *vformat);
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61 static SDL_Rect **SVGA_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags);
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62 static SDL_Surface *SVGA_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags);
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63 static int SVGA_SetColors(_THIS, int firstcolor, int ncolors,
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64 SDL_Color *colors);
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65 static void SVGA_VideoQuit(_THIS);
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66
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67 /* Hardware surface functions */
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68 static int SVGA_AllocHWSurface(_THIS, SDL_Surface *surface);
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69 static int SVGA_LockHWSurface(_THIS, SDL_Surface *surface);
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70 static int SVGA_FlipHWSurface(_THIS, SDL_Surface *surface);
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71 static void SVGA_UnlockHWSurface(_THIS, SDL_Surface *surface);
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72 static void SVGA_FreeHWSurface(_THIS, SDL_Surface *surface);
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73
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74 /* SVGAlib driver bootstrap functions */
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75
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76 static int SVGA_Available(void)
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77 {
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78 /* Check to see if we are root and stdin is a virtual console */
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79 int console;
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80
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81 console = STDIN_FILENO;
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82 if ( console >= 0 ) {
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83 struct stat sb;
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84 struct vt_mode dummy;
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85
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86 if ( (fstat(console, &sb) < 0) ||
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87 (ioctl(console, VT_GETMODE, &dummy) < 0) ) {
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88 console = -1;
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89 }
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90 }
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91 return((geteuid() == 0) && (console >= 0));
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92 }
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93
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94 static void SVGA_DeleteDevice(SDL_VideoDevice *device)
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95 {
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96 free(device->hidden);
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97 free(device);
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98 }
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99
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100 static SDL_VideoDevice *SVGA_CreateDevice(int devindex)
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101 {
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102 SDL_VideoDevice *device;
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103
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104 /* Initialize all variables that we clean on shutdown */
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105 device = (SDL_VideoDevice *)malloc(sizeof(SDL_VideoDevice));
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106 if ( device ) {
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107 memset(device, 0, (sizeof *device));
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108 device->hidden = (struct SDL_PrivateVideoData *)
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109 malloc((sizeof *device->hidden));
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110 }
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111 if ( (device == NULL) || (device->hidden == NULL) ) {
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112 SDL_OutOfMemory();
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113 if ( device ) {
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114 free(device);
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115 }
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116 return(0);
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117 }
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118 memset(device->hidden, 0, (sizeof *device->hidden));
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119
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120 /* Set the function pointers */
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121 device->VideoInit = SVGA_VideoInit;
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122 device->ListModes = SVGA_ListModes;
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123 device->SetVideoMode = SVGA_SetVideoMode;
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124 device->SetColors = SVGA_SetColors;
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125 device->UpdateRects = NULL;
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126 device->VideoQuit = SVGA_VideoQuit;
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127 device->AllocHWSurface = SVGA_AllocHWSurface;
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128 device->CheckHWBlit = NULL;
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129 device->FillHWRect = NULL;
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130 device->SetHWColorKey = NULL;
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131 device->SetHWAlpha = NULL;
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132 device->LockHWSurface = SVGA_LockHWSurface;
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133 device->UnlockHWSurface = SVGA_UnlockHWSurface;
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134 device->FlipHWSurface = NULL;
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135 device->FreeHWSurface = SVGA_FreeHWSurface;
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136 device->SetCaption = NULL;
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137 device->SetIcon = NULL;
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138 device->IconifyWindow = NULL;
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139 device->GrabInput = NULL;
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140 device->GetWMInfo = NULL;
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141 device->InitOSKeymap = SVGA_InitOSKeymap;
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142 device->PumpEvents = SVGA_PumpEvents;
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143
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144 device->free = SVGA_DeleteDevice;
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145
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146 return device;
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147 }
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148
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149 VideoBootStrap SVGALIB_bootstrap = {
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150 "svgalib", "SVGAlib",
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151 SVGA_Available, SVGA_CreateDevice
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152 };
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153
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154 static int SVGA_AddMode(_THIS, int mode, int actually_add, int force)
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155 {
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156 vga_modeinfo *modeinfo;
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157
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158 modeinfo = vga_getmodeinfo(mode);
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159 if ( force || ( modeinfo->flags & CAPABLE_LINEAR ) ) {
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160 int i, j;
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161
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162 i = modeinfo->bytesperpixel-1;
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163 if ( actually_add ) {
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164 SDL_Rect saved_rect[2];
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165 int saved_mode[2];
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166 int b;
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167
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168 /* Add the mode, sorted largest to smallest */
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169 b = 0;
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170 j = 0;
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171 while ( (SDL_modelist[i][j]->w > modeinfo->width) ||
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172 (SDL_modelist[i][j]->h > modeinfo->height) ) {
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173 ++j;
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174 }
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175 /* Skip modes that are already in our list */
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176 if ( (SDL_modelist[i][j]->w == modeinfo->width) &&
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177 (SDL_modelist[i][j]->h == modeinfo->height) ) {
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178 return(0);
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179 }
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180 /* Insert the new mode */
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181 saved_rect[b] = *SDL_modelist[i][j];
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182 saved_mode[b] = SDL_vgamode[i][j];
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183 SDL_modelist[i][j]->w = modeinfo->width;
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184 SDL_modelist[i][j]->h = modeinfo->height;
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185 SDL_vgamode[i][j] = mode;
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186 /* Everybody scoot down! */
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187 if ( saved_rect[b].w && saved_rect[b].h ) {
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188 for ( ++j; SDL_modelist[i][j]->w; ++j ) {
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189 saved_rect[!b] = *SDL_modelist[i][j];
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190 saved_mode[!b] = SDL_vgamode[i][j];
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191 *SDL_modelist[i][j] = saved_rect[b];
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192 SDL_vgamode[i][j] = saved_mode[b];
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193 b = !b;
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194 }
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195 *SDL_modelist[i][j] = saved_rect[b];
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196 SDL_vgamode[i][j] = saved_mode[b];
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197 }
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198 } else {
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199 ++SDL_nummodes[i];
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200 }
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201 }
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202 return( force || ( modeinfo->flags & CAPABLE_LINEAR ) );
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203 }
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204
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205 static void SVGA_UpdateVideoInfo(_THIS)
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206 {
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207 vga_modeinfo *modeinfo;
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208
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209 this->info.wm_available = 0;
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210 this->info.hw_available = 1;
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211 modeinfo = vga_getmodeinfo(vga_getcurrentmode());
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212 this->info.video_mem = (modeinfo->maxpixels/1024);
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213 if ( modeinfo->bytesperpixel > 0 ) {
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214 this->info.video_mem *= modeinfo->bytesperpixel;
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215 }
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216 /* FIXME: Add hardware accelerated blit information */
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217 #if 0
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218 printf("Hardware accelerated blit: %savailable\n", modeinfo->haveblit ? "" : "not ");
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219 #endif
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220 }
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221
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222 int SVGA_VideoInit(_THIS, SDL_PixelFormat *vformat)
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223 {
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224 int keyboard;
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225 int i, j;
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226 int mode, total_modes;
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227
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228 /* Initialize all variables that we clean on shutdown */
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229 for ( i=0; i<NUM_MODELISTS; ++i ) {
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230 SDL_nummodes[i] = 0;
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231 SDL_modelist[i] = NULL;
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232 SDL_vgamode[i] = NULL;
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233 }
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234
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235 /* Initialize the library */
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236 vga_disabledriverreport();
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237 if ( vga_init() < 0 ) {
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238 SDL_SetError("Unable to initialize SVGAlib");
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239 return(-1);
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240 }
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241 vga_setmode(TEXT);
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242
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243 /* Enable mouse and keyboard support */
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244 vga_setmousesupport(1);
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245 keyboard = keyboard_init_return_fd();
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246 if ( keyboard < 0 ) {
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247 SDL_SetError("Unable to initialize keyboard");
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248 return(-1);
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249 }
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250 if ( SVGA_initkeymaps(keyboard) < 0 ) {
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251 return(-1);
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252 }
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253 keyboard_seteventhandler(SVGA_keyboardcallback);
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254
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255 /* Determine the screen depth (use default 8-bit depth) */
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256 vformat->BitsPerPixel = 8;
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257
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258 /* Enumerate the available fullscreen modes */
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259 total_modes = 0;
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260 for ( mode=vga_lastmodenumber(); mode; --mode ) {
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261 if ( vga_hasmode(mode) ) {
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262 if ( SVGA_AddMode(this, mode, 0, 0) ) {
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263 ++total_modes;
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264 }
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265 }
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266 }
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267 if ( SVGA_AddMode(this, G320x200x256, 0, 1) ) ++total_modes;
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268 if ( total_modes == 0 ) {
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269 SDL_SetError("No linear video modes available");
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270 return(-1);
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271 }
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272 for ( i=0; i<NUM_MODELISTS; ++i ) {
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273 SDL_vgamode[i] = (int *)malloc(SDL_nummodes[i]*sizeof(int));
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274 if ( SDL_vgamode[i] == NULL ) {
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275 SDL_OutOfMemory();
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276 return(-1);
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277 }
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278 SDL_modelist[i] = (SDL_Rect **)
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279 malloc((SDL_nummodes[i]+1)*sizeof(SDL_Rect *));
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280 if ( SDL_modelist[i] == NULL ) {
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281 SDL_OutOfMemory();
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282 return(-1);
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283 }
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284 for ( j=0; j<SDL_nummodes[i]; ++j ) {
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285 SDL_modelist[i][j]=(SDL_Rect *)malloc(sizeof(SDL_Rect));
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286 if ( SDL_modelist[i][j] == NULL ) {
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287 SDL_OutOfMemory();
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288 return(-1);
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289 }
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290 memset(SDL_modelist[i][j], 0, sizeof(SDL_Rect));
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291 }
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292 SDL_modelist[i][j] = NULL;
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293 }
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294 for ( mode=vga_lastmodenumber(); mode; --mode ) {
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295 if ( vga_hasmode(mode) ) {
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296 SVGA_AddMode(this, mode, 1, 0);
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297 }
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298 }
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299 SVGA_AddMode(this, G320x200x256, 1, 1);
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300
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301 /* Free extra (duplicated) modes */
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302 for ( i=0; i<NUM_MODELISTS; ++i ) {
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303 j = 0;
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304 while ( SDL_modelist[i][j] && SDL_modelist[i][j]->w ) {
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305 j++;
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306 }
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307 while ( SDL_modelist[i][j] ) {
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308 free(SDL_modelist[i][j]);
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309 SDL_modelist[i][j] = NULL;
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310 j++;
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311 }
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312 }
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313
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314 /* Fill in our hardware acceleration capabilities */
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315 SVGA_UpdateVideoInfo(this);
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316
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317 /* We're done! */
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318 return(0);
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319 }
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320
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321 SDL_Rect **SVGA_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags)
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322 {
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323 return(SDL_modelist[((format->BitsPerPixel+7)/8)-1]);
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324 }
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325
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326 /* Various screen update functions available */
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327 static void SVGA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects);
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328 static void SVGA_BankedUpdate(_THIS, int numrects, SDL_Rect *rects);
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329
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330 SDL_Surface *SVGA_SetVideoMode(_THIS, SDL_Surface *current,
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331 int width, int height, int bpp, Uint32 flags)
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332 {
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333 int mode;
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334 int vgamode;
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335 vga_modeinfo *modeinfo;
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336
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337 /* Try to set the requested linear video mode */
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338 bpp = (bpp+7)/8-1;
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339 for ( mode=0; SDL_modelist[bpp][mode]; ++mode ) {
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340 if ( (SDL_modelist[bpp][mode]->w == width) &&
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341 (SDL_modelist[bpp][mode]->h == height) ) {
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342 break;
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343 }
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344 }
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345 if ( SDL_modelist[bpp][mode] == NULL ) {
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346 SDL_SetError("Couldn't find requested mode in list");
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347 return(NULL);
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348 }
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349 vga_setmode(SDL_vgamode[bpp][mode]);
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350 vga_setpage(0);
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351
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352 vgamode=SDL_vgamode[bpp][mode];
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353 if ((vga_setlinearaddressing()<0) && (vgamode!=G320x200x256)) {
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354 SDL_SetError("Unable to set linear addressing");
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355 return(NULL);
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356 }
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357 modeinfo = vga_getmodeinfo(SDL_vgamode[bpp][mode]);
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358
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359 /* Update hardware acceleration info */
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360 SVGA_UpdateVideoInfo(this);
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361
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362 /* Allocate the new pixel format for the screen */
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363 bpp = (bpp+1)*8;
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364 if ( (bpp == 16) && (modeinfo->colors == 32768) ) {
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365 bpp = 15;
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366 }
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367 if ( ! SDL_ReallocFormat(current, bpp, 0, 0, 0, 0) ) {
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368 return(NULL);
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369 }
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370
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371 /* Set up the new mode framebuffer */
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372 current->flags = (SDL_FULLSCREEN|SDL_HWSURFACE);
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373 current->w = width;
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374 current->h = height;
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375 current->pitch = modeinfo->linewidth;
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376 current->pixels = vga_getgraphmem();
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377
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378 /* Set the blit function */
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379 this->UpdateRects = SVGA_DirectUpdate;
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380
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381 /* Set up the mouse handler again (buggy SVGAlib 1.40) */
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382 mouse_seteventhandler(SVGA_mousecallback);
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383
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384 /* We're done */
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385 return(current);
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386 }
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387
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388 /* We don't actually allow hardware surfaces other than the main one */
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389 static int SVGA_AllocHWSurface(_THIS, SDL_Surface *surface)
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390 {
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391 return(-1);
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392 }
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393 static void SVGA_FreeHWSurface(_THIS, SDL_Surface *surface)
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394 {
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395 return;
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396 }
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397
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398 /* We need to wait for vertical retrace on page flipped displays */
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399 static int SVGA_LockHWSurface(_THIS, SDL_Surface *surface)
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400 {
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401 if ( (surface->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF ) {
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402 vga_waitretrace();
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403 }
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404 return(0);
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405 }
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406 static void SVGA_UnlockHWSurface(_THIS, SDL_Surface *surface)
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407 {
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408 return;
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409 }
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410
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411 /* FIXME: How is this done with SVGAlib? */
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412 static int SVGA_FlipHWSurface(_THIS, SDL_Surface *surface)
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413 {
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414 return(0);
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415 }
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416
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417 static void SVGA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects)
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418 {
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419 return;
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420 }
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421
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422 /* FIXME: Can this be used under SVGAlib? */
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423 static void SVGA_BankedUpdate(_THIS, int numrects, SDL_Rect *rects)
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424 {
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425 return;
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426 }
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427
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428 int SVGA_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors)
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429 {
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430 int i;
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431
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432 for(i = 0; i < ncolors; i++) {
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433 vga_setpalette(firstcolor + i,
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434 colors[i].r>>2,
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435 colors[i].g>>2,
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436 colors[i].b>>2);
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437 }
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438 return(1);
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439 }
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440
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441 /* Note: If we are terminated, this could be called in the middle of
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442 another SDL video routine -- notably UpdateRects.
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443 */
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444 void SVGA_VideoQuit(_THIS)
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445 {
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446 int i, j;
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447
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448 /* Reset the console video mode */
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449 if ( this->screen && (this->screen->w && this->screen->h) ) {
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450 vga_setmode(TEXT);
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451 }
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452 keyboard_close();
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453
|
|
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454 /* Free video mode lists */
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455 for ( i=0; i<NUM_MODELISTS; ++i ) {
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456 if ( SDL_modelist[i] != NULL ) {
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|
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457 for ( j=0; SDL_modelist[i][j]; ++j )
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|
|
458 free(SDL_modelist[i][j]);
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|
|
459 free(SDL_modelist[i]);
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|
|
460 SDL_modelist[i] = NULL;
|
|
|
461 }
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|
|
462 if ( SDL_vgamode[i] != NULL ) {
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|
|
463 free(SDL_vgamode[i]);
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|
|
464 SDL_vgamode[i] = NULL;
|
|
|
465 }
|
|
|
466 }
|
|
|
467 if ( this->screen && (this->screen->flags & SDL_HWSURFACE) ) {
|
|
|
468 /* Direct screen access, no memory buffer */
|
|
|
469 this->screen->pixels = NULL;
|
|
|
470 }
|
|
|
471 }
|
