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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 /* SVGAlib based SDL video driver implementation. |
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25 */ |
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26 |
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27 #include <unistd.h> |
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28 #include <sys/stat.h> |
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29 #include <sys/types.h> |
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30 #include <sys/ioctl.h> |
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31 #include <fcntl.h> |
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32 |
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33 #if defined(__LINUX__) |
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34 #include <linux/vt.h> |
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35 #elif defined(__FREEBSD__) |
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36 #include <sys/consio.h> |
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37 #else |
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38 #error You must choose your operating system here |
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39 #endif |
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40 #include <vga.h> |
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41 #include <vgamouse.h> |
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42 #include <vgakeyboard.h> |
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43 |
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44 #include "SDL_video.h" |
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45 #include "SDL_mouse.h" |
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46 #include "../SDL_sysvideo.h" |
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47 #include "../SDL_pixels_c.h" |
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48 #include "../../events/SDL_events_c.h" |
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49 #include "SDL_svgavideo.h" |
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50 #include "SDL_svgaevents_c.h" |
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51 #include "SDL_svgamouse_c.h" |
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52 |
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53 /* Initialization/Query functions */ |
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54 static int SVGA_VideoInit(_THIS, SDL_PixelFormat *vformat); |
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55 static SDL_Rect **SVGA_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags); |
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56 static SDL_Surface *SVGA_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags); |
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57 static int SVGA_SetColors(_THIS, int firstcolor, int ncolors, |
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58 SDL_Color *colors); |
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59 static void SVGA_VideoQuit(_THIS); |
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60 |
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61 /* Hardware surface functions */ |
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62 static int SVGA_AllocHWSurface(_THIS, SDL_Surface *surface); |
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63 static int SVGA_LockHWSurface(_THIS, SDL_Surface *surface); |
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64 static int SVGA_FlipHWSurface(_THIS, SDL_Surface *surface); |
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65 static void SVGA_UnlockHWSurface(_THIS, SDL_Surface *surface); |
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66 static void SVGA_FreeHWSurface(_THIS, SDL_Surface *surface); |
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67 |
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68 /* SVGAlib driver bootstrap functions */ |
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69 |
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70 static int SVGA_Available(void) |
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71 { |
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72 /* Check to see if we are root and stdin is a virtual console */ |
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73 int console; |
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74 |
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75 /* SVGALib 1.9.x+ doesn't require root (via /dev/svga) */ |
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76 int svgalib2 = -1; |
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77 |
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78 /* See if we are connected to a virtual terminal */ |
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79 console = STDIN_FILENO; |
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80 #if 0 /* This is no longer needed, SVGAlib can switch consoles for us */ |
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81 if ( console >= 0 ) { |
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82 struct stat sb; |
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83 struct vt_mode dummy; |
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84 |
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85 if ( (fstat(console, &sb) < 0) || |
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86 (ioctl(console, VT_GETMODE, &dummy) < 0) ) { |
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87 console = -1; |
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88 } |
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89 } |
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90 #endif /* 0 */ |
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91 |
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92 /* See if SVGAlib 2.0 is available */ |
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93 svgalib2 = open("/dev/svga", O_RDONLY); |
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94 if (svgalib2 != -1) { |
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95 close(svgalib2); |
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96 } |
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97 |
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98 return(((svgalib2 != -1) || (geteuid() == 0)) && (console >= 0)); |
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99 } |
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100 |
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101 static void SVGA_DeleteDevice(SDL_VideoDevice *device) |
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102 { |
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103 SDL_free(device->hidden); |
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104 SDL_free(device); |
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105 } |
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106 |
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107 static SDL_VideoDevice *SVGA_CreateDevice(int devindex) |
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108 { |
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109 SDL_VideoDevice *device; |
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110 |
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111 /* Initialize all variables that we clean on shutdown */ |
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112 device = (SDL_VideoDevice *)SDL_malloc(sizeof(SDL_VideoDevice)); |
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113 if ( device ) { |
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114 SDL_memset(device, 0, (sizeof *device)); |
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115 device->hidden = (struct SDL_PrivateVideoData *) |
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116 SDL_malloc((sizeof *device->hidden)); |
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117 } |
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118 if ( (device == NULL) || (device->hidden == NULL) ) { |
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119 SDL_OutOfMemory(); |
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120 if ( device ) { |
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121 SDL_free(device); |
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122 } |
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123 return(0); |
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124 } |
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125 SDL_memset(device->hidden, 0, (sizeof *device->hidden)); |
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126 |
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127 /* Set the function pointers */ |
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128 device->VideoInit = SVGA_VideoInit; |
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129 device->ListModes = SVGA_ListModes; |
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130 device->SetVideoMode = SVGA_SetVideoMode; |
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131 device->SetColors = SVGA_SetColors; |
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132 device->UpdateRects = NULL; |
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133 device->VideoQuit = SVGA_VideoQuit; |
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134 device->AllocHWSurface = SVGA_AllocHWSurface; |
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135 device->CheckHWBlit = NULL; |
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136 device->FillHWRect = NULL; |
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137 device->SetHWColorKey = NULL; |
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138 device->SetHWAlpha = NULL; |
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139 device->LockHWSurface = SVGA_LockHWSurface; |
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140 device->UnlockHWSurface = SVGA_UnlockHWSurface; |
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141 device->FlipHWSurface = SVGA_FlipHWSurface; |
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142 device->FreeHWSurface = SVGA_FreeHWSurface; |
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143 device->SetCaption = NULL; |
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144 device->SetIcon = NULL; |
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145 device->IconifyWindow = NULL; |
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146 device->GrabInput = NULL; |
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147 device->GetWMInfo = NULL; |
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148 device->InitOSKeymap = SVGA_InitOSKeymap; |
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149 device->PumpEvents = SVGA_PumpEvents; |
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150 |
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151 device->free = SVGA_DeleteDevice; |
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152 |
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153 return device; |
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154 } |
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155 |
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156 VideoBootStrap SVGALIB_bootstrap = { |
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157 "svgalib", "SVGAlib", |
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158 SVGA_Available, SVGA_CreateDevice |
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159 }; |
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160 |
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161 static int SVGA_AddMode(_THIS, int mode, int actually_add) |
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162 { |
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163 int i, j; |
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164 vga_modeinfo *modeinfo; |
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165 |
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166 modeinfo = vga_getmodeinfo(mode); |
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167 |
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168 i = modeinfo->bytesperpixel-1; |
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169 if ( i < 0 ) { |
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170 return 0; |
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171 } |
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172 if ( actually_add ) { |
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173 SDL_Rect saved_rect[2]; |
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174 int saved_mode[2]; |
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175 int b; |
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176 |
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177 /* Add the mode, sorted largest to smallest */ |
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178 b = 0; |
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179 j = 0; |
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180 while ( (SDL_modelist[i][j]->w > modeinfo->width) || |
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181 (SDL_modelist[i][j]->h > modeinfo->height) ) { |
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182 ++j; |
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183 } |
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184 /* Skip modes that are already in our list */ |
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185 if ( (SDL_modelist[i][j]->w == modeinfo->width) && |
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186 (SDL_modelist[i][j]->h == modeinfo->height) ) { |
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187 return(0); |
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188 } |
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189 /* Insert the new mode */ |
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190 saved_rect[b] = *SDL_modelist[i][j]; |
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191 saved_mode[b] = SDL_vgamode[i][j]; |
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192 SDL_modelist[i][j]->w = modeinfo->width; |
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193 SDL_modelist[i][j]->h = modeinfo->height; |
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194 SDL_vgamode[i][j] = mode; |
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195 /* Everybody scoot down! */ |
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196 if ( saved_rect[b].w && saved_rect[b].h ) { |
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197 for ( ++j; SDL_modelist[i][j]->w; ++j ) { |
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198 saved_rect[!b] = *SDL_modelist[i][j]; |
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199 saved_mode[!b] = SDL_vgamode[i][j]; |
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200 *SDL_modelist[i][j] = saved_rect[b]; |
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201 SDL_vgamode[i][j] = saved_mode[b]; |
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202 b = !b; |
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203 } |
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204 *SDL_modelist[i][j] = saved_rect[b]; |
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205 SDL_vgamode[i][j] = saved_mode[b]; |
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206 } |
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207 } else { |
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208 ++SDL_nummodes[i]; |
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209 } |
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210 return(1); |
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211 } |
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212 |
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213 static void SVGA_UpdateVideoInfo(_THIS) |
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214 { |
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215 vga_modeinfo *modeinfo; |
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216 |
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217 this->info.wm_available = 0; |
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218 this->info.hw_available = (banked ? 0 : 1); |
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219 modeinfo = vga_getmodeinfo(vga_getcurrentmode()); |
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220 this->info.video_mem = modeinfo->memory; |
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221 /* FIXME: Add hardware accelerated blit information */ |
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222 #ifdef SVGALIB_DEBUG |
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223 printf("Hardware accelerated blit: %savailable\n", modeinfo->haveblit ? "" : "not "); |
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224 #endif |
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225 } |
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226 |
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227 int SVGA_VideoInit(_THIS, SDL_PixelFormat *vformat) |
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228 { |
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229 int keyboard; |
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230 int i, j; |
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231 int mode, total_modes; |
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232 |
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233 /* Initialize all variables that we clean on shutdown */ |
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234 for ( i=0; i<NUM_MODELISTS; ++i ) { |
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235 SDL_nummodes[i] = 0; |
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236 SDL_modelist[i] = NULL; |
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237 SDL_vgamode[i] = NULL; |
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238 } |
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239 |
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240 /* Initialize the library */ |
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241 vga_disabledriverreport(); |
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242 if ( vga_init() < 0 ) { |
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243 SDL_SetError("Unable to initialize SVGAlib"); |
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244 return(-1); |
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245 } |
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246 vga_setmode(TEXT); |
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247 |
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248 /* Enable mouse and keyboard support */ |
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249 vga_setmousesupport(1); |
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250 keyboard = keyboard_init_return_fd(); |
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251 if ( keyboard < 0 ) { |
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252 SDL_SetError("Unable to initialize keyboard"); |
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253 return(-1); |
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254 } |
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255 if ( SVGA_initkeymaps(keyboard) < 0 ) { |
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256 return(-1); |
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257 } |
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258 keyboard_seteventhandler(SVGA_keyboardcallback); |
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259 |
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260 /* Determine the current screen size */ |
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261 this->info.current_w = 0; |
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262 this->info.current_h = 0; |
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263 |
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264 /* Determine the screen depth (use default 8-bit depth) */ |
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265 vformat->BitsPerPixel = 8; |
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266 |
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267 /* Enumerate the available fullscreen modes */ |
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268 total_modes = 0; |
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269 for ( mode=vga_lastmodenumber(); mode; --mode ) { |
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270 if ( vga_hasmode(mode) ) { |
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271 if ( SVGA_AddMode(this, mode, 0) ) { |
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272 ++total_modes; |
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273 } |
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274 } |
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275 } |
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276 if ( SVGA_AddMode(this, G320x200x256, 0) ) ++total_modes; |
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277 if ( total_modes == 0 ) { |
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278 SDL_SetError("No linear video modes available"); |
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279 return(-1); |
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280 } |
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281 for ( i=0; i<NUM_MODELISTS; ++i ) { |
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282 SDL_vgamode[i] = (int *)SDL_malloc(SDL_nummodes[i]*sizeof(int)); |
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283 if ( SDL_vgamode[i] == NULL ) { |
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284 SDL_OutOfMemory(); |
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285 return(-1); |
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286 } |
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287 SDL_modelist[i] = (SDL_Rect **) |
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288 SDL_malloc((SDL_nummodes[i]+1)*sizeof(SDL_Rect *)); |
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289 if ( SDL_modelist[i] == NULL ) { |
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290 SDL_OutOfMemory(); |
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291 return(-1); |
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292 } |
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293 for ( j=0; j<SDL_nummodes[i]; ++j ) { |
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294 SDL_modelist[i][j]=(SDL_Rect *)SDL_malloc(sizeof(SDL_Rect)); |
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295 if ( SDL_modelist[i][j] == NULL ) { |
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296 SDL_OutOfMemory(); |
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297 return(-1); |
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298 } |
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299 SDL_memset(SDL_modelist[i][j], 0, sizeof(SDL_Rect)); |
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300 } |
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301 SDL_modelist[i][j] = NULL; |
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302 } |
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303 for ( mode=vga_lastmodenumber(); mode; --mode ) { |
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304 if ( vga_hasmode(mode) ) { |
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305 SVGA_AddMode(this, mode, 1); |
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306 } |
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307 } |
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308 SVGA_AddMode(this, G320x200x256, 1); |
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309 |
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310 /* Free extra (duplicated) modes */ |
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311 for ( i=0; i<NUM_MODELISTS; ++i ) { |
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312 j = 0; |
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313 while ( SDL_modelist[i][j] && SDL_modelist[i][j]->w ) { |
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314 j++; |
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315 } |
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316 while ( SDL_modelist[i][j] ) { |
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317 SDL_free(SDL_modelist[i][j]); |
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318 SDL_modelist[i][j] = NULL; |
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319 j++; |
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320 } |
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321 } |
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322 |
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323 /* Fill in our hardware acceleration capabilities */ |
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324 SVGA_UpdateVideoInfo(this); |
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325 |
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326 /* We're done! */ |
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327 return(0); |
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328 } |
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329 |
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330 SDL_Rect **SVGA_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags) |
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331 { |
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332 return(SDL_modelist[((format->BitsPerPixel+7)/8)-1]); |
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333 } |
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334 |
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335 /* Various screen update functions available */ |
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336 static void SVGA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects); |
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337 static void SVGA_BankedUpdate(_THIS, int numrects, SDL_Rect *rects); |
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338 |
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339 SDL_Surface *SVGA_SetVideoMode(_THIS, SDL_Surface *current, |
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340 int width, int height, int bpp, Uint32 flags) |
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341 { |
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342 int mode; |
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343 int vgamode; |
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344 vga_modeinfo *modeinfo; |
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345 int screenpage_len; |
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346 |
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347 /* Free old pixels if we were in banked mode */ |
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348 if ( banked && current->pixels ) { |
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349 free(current->pixels); |
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350 current->pixels = NULL; |
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351 } |
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352 |
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353 /* Try to set the requested linear video mode */ |
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354 bpp = (bpp+7)/8-1; |
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355 for ( mode=0; SDL_modelist[bpp][mode]; ++mode ) { |
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356 if ( (SDL_modelist[bpp][mode]->w == width) && |
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357 (SDL_modelist[bpp][mode]->h == height) ) { |
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358 break; |
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359 } |
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360 } |
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361 if ( SDL_modelist[bpp][mode] == NULL ) { |
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362 SDL_SetError("Couldn't find requested mode in list"); |
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363 return(NULL); |
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364 } |
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365 vgamode = SDL_vgamode[bpp][mode]; |
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366 vga_setmode(vgamode); |
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367 vga_setpage(0); |
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368 |
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369 if ( (vga_setlinearaddressing() < 0) && (vgamode != G320x200x256) ) { |
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370 banked = 1; |
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371 } else { |
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372 banked = 0; |
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373 } |
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374 |
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375 modeinfo = vga_getmodeinfo(SDL_vgamode[bpp][mode]); |
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376 |
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377 /* Update hardware acceleration info */ |
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378 SVGA_UpdateVideoInfo(this); |
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379 |
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380 /* Allocate the new pixel format for the screen */ |
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381 bpp = (bpp+1)*8; |
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382 if ( (bpp == 16) && (modeinfo->colors == 32768) ) { |
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383 bpp = 15; |
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384 } |
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385 if ( ! SDL_ReallocFormat(current, bpp, 0, 0, 0, 0) ) { |
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386 return(NULL); |
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387 } |
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388 |
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389 /* Set up the new mode framebuffer */ |
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390 current->flags = SDL_FULLSCREEN; |
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391 if ( !banked ) { |
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392 current->flags |= SDL_HWSURFACE; |
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393 } |
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394 if ( bpp == 8 ) { |
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395 /* FIXME: What about DirectColor? */ |
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396 current->flags |= SDL_HWPALETTE; |
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397 } |
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398 current->w = width; |
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399 current->h = height; |
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400 current->pitch = modeinfo->linewidth; |
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401 if ( banked ) { |
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402 current->pixels = SDL_malloc(current->h * current->pitch); |
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403 if ( !current->pixels ) { |
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404 SDL_OutOfMemory(); |
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405 return(NULL); |
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406 } |
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407 } else { |
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408 current->pixels = vga_getgraphmem(); |
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409 } |
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410 |
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411 /* set double-buffering */ |
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412 if ( (flags & SDL_DOUBLEBUF) && !banked ) |
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413 { |
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414 /* length of one screen page in bytes */ |
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415 screenpage_len=current->h*modeinfo->linewidth; |
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416 |
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417 /* if start address should be aligned */ |
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418 if ( modeinfo->linewidth_unit ) |
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419 { |
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420 if ( screenpage_len % modeinfo->linewidth_unit ) |
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421 { |
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422 screenpage_len += modeinfo->linewidth_unit - ( screenpage_len % modeinfo->linewidth_unit ); |
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423 } |
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424 } |
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425 |
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426 /* if we heve enough videomemory = ak je dost videopamete */ |
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427 if ( modeinfo->memory > ( screenpage_len * 2 / 1024 ) ) |
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428 { |
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429 current->flags |= SDL_DOUBLEBUF; |
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430 flip_page = 0; |
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431 flip_offset[0] = 0; |
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432 flip_offset[1] = screenpage_len; |
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433 flip_address[0] = vga_getgraphmem(); |
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434 flip_address[1] = flip_address[0]+screenpage_len; |
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435 SVGA_FlipHWSurface(this,current); |
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436 } |
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437 } |
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438 |
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439 /* Set the blit function */ |
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440 if ( banked ) { |
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441 this->UpdateRects = SVGA_BankedUpdate; |
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442 } else { |
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443 this->UpdateRects = SVGA_DirectUpdate; |
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444 } |
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445 |
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446 /* Set up the mouse handler again (buggy SVGAlib 1.40) */ |
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447 mouse_seteventhandler(SVGA_mousecallback); |
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448 |
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449 /* We're done */ |
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450 return(current); |
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451 } |
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452 |
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453 /* We don't actually allow hardware surfaces other than the main one */ |
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454 static int SVGA_AllocHWSurface(_THIS, SDL_Surface *surface) |
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455 { |
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456 return(-1); |
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457 } |
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458 static void SVGA_FreeHWSurface(_THIS, SDL_Surface *surface) |
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459 { |
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460 return; |
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461 } |
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462 |
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463 /* We need to wait for vertical retrace on page flipped displays */ |
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464 static int SVGA_LockHWSurface(_THIS, SDL_Surface *surface) |
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465 { |
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466 /* The waiting is done in SVGA_FlipHWSurface() */ |
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467 return(0); |
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468 } |
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469 static void SVGA_UnlockHWSurface(_THIS, SDL_Surface *surface) |
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470 { |
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471 return; |
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472 } |
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473 |
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474 static int SVGA_FlipHWSurface(_THIS, SDL_Surface *surface) |
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475 { |
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476 if ( !banked ) { |
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477 vga_setdisplaystart(flip_offset[flip_page]); |
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478 flip_page=!flip_page; |
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479 surface->pixels=flip_address[flip_page]; |
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480 vga_waitretrace(); |
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481 } |
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482 return(0); |
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483 } |
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484 |
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485 static void SVGA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects) |
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486 { |
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487 return; |
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488 } |
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489 |
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490 static void SVGA_BankedUpdate(_THIS, int numrects, SDL_Rect *rects) |
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491 { |
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492 int i, j; |
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493 SDL_Rect *rect; |
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494 int page, vp; |
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495 int x, y, w, h; |
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496 unsigned char *src; |
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497 unsigned char *dst; |
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498 int bpp = this->screen->format->BytesPerPixel; |
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499 int pitch = this->screen->pitch; |
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500 |
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501 dst = vga_getgraphmem(); |
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502 for ( i=0; i < numrects; ++i ) { |
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503 rect = &rects[i]; |
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504 x = rect->x; |
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505 y = rect->y; |
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506 w = rect->w * bpp; |
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507 h = rect->h; |
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508 |
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509 vp = y * pitch + x * bpp; |
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510 src = (unsigned char *)this->screen->pixels + vp; |
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511 page = vp >> 16; |
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512 vp &= 0xffff; |
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513 vga_setpage(page); |
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514 for (j = 0; j < h; j++) { |
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515 if (vp + w > 0x10000) { |
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516 if (vp >= 0x10000) { |
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517 page++; |
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518 vga_setpage(page); |
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519 vp &= 0xffff; |
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520 } else { |
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521 SDL_memcpy(dst + vp, src, 0x10000 - vp); |
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522 page++; |
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523 vga_setpage(page); |
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524 SDL_memcpy(dst, src + 0x10000 - vp, |
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525 (vp + w) & 0xffff); |
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526 vp = (vp + pitch) & 0xffff; |
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527 src += pitch; |
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528 continue; |
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529 } |
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530 } |
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531 SDL_memcpy(dst + vp, src, w); |
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532 src += pitch; |
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533 vp += pitch; |
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534 } |
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535 } |
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536 } |
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537 |
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538 int SVGA_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors) |
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539 { |
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540 int i; |
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541 |
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542 for(i = 0; i < ncolors; i++) { |
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543 vga_setpalette(firstcolor + i, |
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544 colors[i].r>>2, |
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545 colors[i].g>>2, |
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546 colors[i].b>>2); |
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547 } |
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548 return(1); |
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549 } |
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550 |
|
551 /* Note: If we are terminated, this could be called in the middle of |
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552 another SDL video routine -- notably UpdateRects. |
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553 */ |
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554 void SVGA_VideoQuit(_THIS) |
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555 { |
|
556 int i, j; |
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557 |
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558 /* Reset the console video mode */ |
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559 if ( this->screen && (this->screen->w && this->screen->h) ) { |
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560 vga_setmode(TEXT); |
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561 } |
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562 keyboard_close(); |
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563 |
|
564 /* Free video mode lists */ |
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565 for ( i=0; i<NUM_MODELISTS; ++i ) { |
|
566 if ( SDL_modelist[i] != NULL ) { |
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567 for ( j=0; SDL_modelist[i][j]; ++j ) |
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568 SDL_free(SDL_modelist[i][j]); |
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569 SDL_free(SDL_modelist[i]); |
|
570 SDL_modelist[i] = NULL; |
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571 } |
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572 if ( SDL_vgamode[i] != NULL ) { |
|
573 SDL_free(SDL_vgamode[i]); |
|
574 SDL_vgamode[i] = NULL; |
|
575 } |
|
576 } |
|
577 if ( this->screen ) { |
|
578 if ( banked && this->screen->pixels ) { |
|
579 SDL_free(this->screen->pixels); |
|
580 } |
|
581 this->screen->pixels = NULL; |
|
582 } |
|
583 } |
|
584 |