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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 /* AAlib 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 |
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30 |
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31 #include "SDL_video.h" |
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32 #include "SDL_mouse.h" |
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33 #include "../SDL_sysvideo.h" |
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34 #include "../SDL_pixels_c.h" |
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35 #include "../../events/SDL_events_c.h" |
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36 |
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37 #include "SDL_aavideo.h" |
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38 #include "SDL_aaevents_c.h" |
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39 #include "SDL_aamouse_c.h" |
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40 |
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41 #include <aalib.h> |
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42 |
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43 /* Initialization/Query functions */ |
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44 static int AA_VideoInit(_THIS, SDL_PixelFormat *vformat); |
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45 static SDL_Rect **AA_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags); |
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46 static SDL_Surface *AA_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags); |
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47 static int AA_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors); |
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48 static void AA_VideoQuit(_THIS); |
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49 |
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50 /* Hardware surface functions */ |
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51 static int AA_AllocHWSurface(_THIS, SDL_Surface *surface); |
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52 static int AA_LockHWSurface(_THIS, SDL_Surface *surface); |
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53 static int AA_FlipHWSurface(_THIS, SDL_Surface *surface); |
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54 static void AA_UnlockHWSurface(_THIS, SDL_Surface *surface); |
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55 static void AA_FreeHWSurface(_THIS, SDL_Surface *surface); |
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56 |
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57 /* Cache the VideoDevice struct */ |
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58 static struct SDL_VideoDevice *local_this; |
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59 |
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60 /* AAlib driver bootstrap functions */ |
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61 |
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62 static int AA_Available(void) |
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63 { |
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64 return 1; /* Always available ! */ |
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65 } |
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66 |
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67 static void AA_DeleteDevice(SDL_VideoDevice *device) |
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68 { |
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69 SDL_free(device->hidden); |
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70 SDL_free(device); |
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71 } |
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72 |
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73 static SDL_VideoDevice *AA_CreateDevice(int devindex) |
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74 { |
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75 SDL_VideoDevice *device; |
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76 |
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77 /* Initialize all variables that we clean on shutdown */ |
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78 device = (SDL_VideoDevice *)SDL_malloc(sizeof(SDL_VideoDevice)); |
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79 if ( device ) { |
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80 SDL_memset(device, 0, (sizeof *device)); |
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81 device->hidden = (struct SDL_PrivateVideoData *) |
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82 SDL_malloc((sizeof *device->hidden)); |
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83 } |
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84 if ( (device == NULL) || (device->hidden == NULL) ) { |
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85 SDL_OutOfMemory(); |
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86 if ( device ) { |
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87 SDL_free(device); |
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88 } |
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89 return(0); |
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90 } |
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91 SDL_memset(device->hidden, 0, (sizeof *device->hidden)); |
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92 |
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93 /* Set the function pointers */ |
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94 device->VideoInit = AA_VideoInit; |
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95 device->ListModes = AA_ListModes; |
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96 device->SetVideoMode = AA_SetVideoMode; |
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97 device->CreateYUVOverlay = NULL; |
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98 device->SetColors = AA_SetColors; |
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99 device->UpdateRects = NULL; |
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100 device->VideoQuit = AA_VideoQuit; |
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101 device->AllocHWSurface = AA_AllocHWSurface; |
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102 device->CheckHWBlit = NULL; |
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103 device->FillHWRect = NULL; |
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104 device->SetHWColorKey = NULL; |
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105 device->SetHWAlpha = NULL; |
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106 device->LockHWSurface = AA_LockHWSurface; |
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107 device->UnlockHWSurface = AA_UnlockHWSurface; |
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108 device->FlipHWSurface = NULL; |
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109 device->FreeHWSurface = AA_FreeHWSurface; |
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110 device->SetCaption = NULL; |
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111 device->SetIcon = NULL; |
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112 device->IconifyWindow = NULL; |
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113 device->GrabInput = NULL; |
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114 device->GetWMInfo = NULL; |
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115 device->InitOSKeymap = AA_InitOSKeymap; |
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116 device->PumpEvents = AA_PumpEvents; |
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117 |
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118 device->free = AA_DeleteDevice; |
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119 |
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120 return device; |
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121 } |
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122 |
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123 VideoBootStrap AALIB_bootstrap = { |
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124 "aalib", "ASCII Art Library", |
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125 AA_Available, AA_CreateDevice |
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126 }; |
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127 |
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128 static void AA_ResizeHandler(aa_context *); |
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129 |
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130 int AA_VideoInit(_THIS, SDL_PixelFormat *vformat) |
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131 { |
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132 int keyboard; |
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133 int i; |
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134 |
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135 /* Initialize all variables that we clean on shutdown */ |
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136 for ( i=0; i<SDL_NUMMODES; ++i ) { |
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137 SDL_modelist[i] = SDL_malloc(sizeof(SDL_Rect)); |
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138 SDL_modelist[i]->x = SDL_modelist[i]->y = 0; |
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139 } |
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140 /* Modes sorted largest to smallest */ |
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141 SDL_modelist[0]->w = 1024; SDL_modelist[0]->h = 768; |
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142 SDL_modelist[1]->w = 800; SDL_modelist[1]->h = 600; |
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143 SDL_modelist[2]->w = 640; SDL_modelist[2]->h = 480; |
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144 SDL_modelist[3]->w = 320; SDL_modelist[3]->h = 400; |
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145 SDL_modelist[4]->w = 320; SDL_modelist[4]->h = 240; |
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146 SDL_modelist[5]->w = 320; SDL_modelist[5]->h = 200; |
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147 SDL_modelist[6] = NULL; |
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148 |
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149 /* Initialize the library */ |
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150 |
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151 AA_mutex = SDL_CreateMutex(); |
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152 |
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153 aa_parseoptions (NULL, NULL, NULL, NULL); |
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154 |
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155 AA_context = aa_autoinit(&aa_defparams); |
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156 if ( ! AA_context ) { |
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157 SDL_SetError("Unable to initialize AAlib"); |
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158 return(-1); |
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159 } |
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160 |
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161 /* Enable mouse and keyboard support */ |
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162 |
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163 if ( ! aa_autoinitkbd (AA_context, AA_SENDRELEASE) ) { |
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164 SDL_SetError("Unable to initialize AAlib keyboard"); |
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165 return(-1); |
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166 } |
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167 if ( ! aa_autoinitmouse (AA_context, AA_SENDRELEASE) ) { |
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168 fprintf(stderr,"Warning: Unable to initialize AAlib mouse"); |
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169 } |
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170 AA_rparams = aa_getrenderparams(); |
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171 |
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172 local_this = this; |
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173 |
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174 aa_resizehandler(AA_context, AA_ResizeHandler); |
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175 |
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176 fprintf(stderr,"Using AAlib driver: %s (%s)\n", AA_context->driver->name, AA_context->driver->shortname); |
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177 |
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178 AA_in_x11 = (SDL_strcmp(AA_context->driver->shortname,"X11") == 0); |
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179 /* Determine the screen depth (use default 8-bit depth) */ |
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180 vformat->BitsPerPixel = 8; |
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181 vformat->BytesPerPixel = 1; |
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182 |
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183 /* We're done! */ |
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184 return(0); |
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185 } |
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186 |
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187 SDL_Rect **AA_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags) |
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188 { |
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189 if(format->BitsPerPixel != 8) |
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190 return NULL; |
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191 |
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192 if ( flags & SDL_FULLSCREEN ) { |
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193 return SDL_modelist; |
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194 } else { |
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195 return (SDL_Rect **) -1; |
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196 } |
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197 } |
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198 |
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199 /* From aavga.c |
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200 AAlib does not give us the choice of the actual resolution, thus we have to simulate additional |
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201 resolution by scaling down manually each frame |
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202 */ |
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203 static void fastscale (register char *b1, register char *b2, int x1, int x2, int y1, int y2) |
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204 { |
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205 register int ex, spx = 0, ddx, ddx1; |
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206 int ddy1, ddy, spy = 0, ey; |
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207 int x; |
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208 char *bb1 = b1; |
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209 if (!x1 || !x2 || !y1 || !y2) |
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210 return; |
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211 ddx = x1 + x1; |
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212 ddx1 = x2 + x2; |
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213 if (ddx1 < ddx) |
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214 spx = ddx / ddx1, ddx %= ddx1; |
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215 ddy = y1 + y1; |
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216 ddy1 = y2 + y2; |
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217 if (ddy1 < ddy) |
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218 spy = (ddy / ddy1) * x1, ddy %= ddy1; |
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219 ey = -ddy1; |
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220 for (; y2; y2--) { |
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221 ex = -ddx1; |
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222 for (x = x2; x; x--) { |
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223 *b2 = *b1; |
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224 b2++; |
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225 b1 += spx; |
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226 ex += ddx; |
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227 if (ex > 0) { |
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228 b1++; |
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229 ex -= ddx1; |
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230 } |
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231 } |
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232 bb1 += spy; |
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233 ey += ddy; |
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234 if (ey > 0) { |
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235 bb1 += x1; |
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236 ey -= ddy1; |
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237 } |
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238 b1 = bb1; |
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239 } |
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240 } |
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241 |
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242 /* Various screen update functions available */ |
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243 static void AA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects); |
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244 |
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245 SDL_Surface *AA_SetVideoMode(_THIS, SDL_Surface *current, |
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246 int width, int height, int bpp, Uint32 flags) |
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247 { |
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248 int mode; |
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249 |
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250 if ( AA_buffer ) { |
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251 SDL_free( AA_buffer ); |
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252 } |
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253 |
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254 AA_buffer = SDL_malloc(width * height); |
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255 if ( ! AA_buffer ) { |
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256 SDL_SetError("Couldn't allocate buffer for requested mode"); |
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257 return(NULL); |
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258 } |
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259 |
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260 /* printf("Setting mode %dx%d\n", width, height); */ |
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261 |
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262 SDL_memset(aa_image(AA_context), 0, aa_imgwidth(AA_context) * aa_imgheight(AA_context)); |
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263 SDL_memset(AA_buffer, 0, width * height); |
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264 |
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265 /* Allocate the new pixel format for the screen */ |
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266 if ( ! SDL_ReallocFormat(current, 8, 0, 0, 0, 0) ) { |
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267 return(NULL); |
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268 } |
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269 |
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270 /* Set up the new mode framebuffer */ |
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271 current->flags = SDL_FULLSCREEN; |
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272 AA_w = current->w = width; |
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273 AA_h = current->h = height; |
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274 current->pitch = current->w; |
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275 current->pixels = AA_buffer; |
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276 |
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277 AA_x_ratio = ((double)aa_imgwidth(AA_context)) / ((double)width); |
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278 AA_y_ratio = ((double)aa_imgheight(AA_context)) / ((double)height); |
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279 |
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280 /* Set the blit function */ |
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281 this->UpdateRects = AA_DirectUpdate; |
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282 |
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283 /* We're done */ |
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284 return(current); |
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285 } |
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286 |
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287 static void AA_ResizeHandler(aa_context *context) |
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288 { |
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289 aa_resize(context); |
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290 local_this->hidden->x_ratio = ((double)aa_imgwidth(context)) / ((double)local_this->screen->w); |
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291 local_this->hidden->y_ratio = ((double)aa_imgheight(context)) / ((double)local_this->screen->h); |
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292 |
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293 fastscale (local_this->hidden->buffer, aa_image(context), local_this->hidden->w, aa_imgwidth (context), local_this->hidden->h, aa_imgheight (context)); |
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294 aa_renderpalette(context, local_this->hidden->palette, local_this->hidden->rparams, 0, 0, aa_scrwidth(context), aa_scrheight(context)); |
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295 aa_flush(context); |
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296 } |
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297 |
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298 /* We don't actually allow hardware surfaces other than the main one */ |
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299 static int AA_AllocHWSurface(_THIS, SDL_Surface *surface) |
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300 { |
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301 return(-1); |
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302 } |
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303 static void AA_FreeHWSurface(_THIS, SDL_Surface *surface) |
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304 { |
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305 return; |
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306 } |
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307 |
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308 /* We need to wait for vertical retrace on page flipped displays */ |
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309 static int AA_LockHWSurface(_THIS, SDL_Surface *surface) |
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310 { |
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311 /* TODO ? */ |
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312 return(0); |
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313 } |
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314 static void AA_UnlockHWSurface(_THIS, SDL_Surface *surface) |
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315 { |
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316 return; |
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317 } |
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318 |
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319 /* FIXME: How is this done with AAlib? */ |
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320 static int AA_FlipHWSurface(_THIS, SDL_Surface *surface) |
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321 { |
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322 SDL_mutexP(AA_mutex); |
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323 aa_flush(AA_context); |
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324 SDL_mutexV(AA_mutex); |
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325 return(0); |
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326 } |
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327 |
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328 static void AA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects) |
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329 { |
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330 int i; |
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331 SDL_Rect *rect; |
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332 |
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333 fastscale (AA_buffer, aa_image(AA_context), AA_w, aa_imgwidth (AA_context), AA_h, aa_imgheight (AA_context)); |
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334 #if 1 |
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335 aa_renderpalette(AA_context, AA_palette, AA_rparams, 0, 0, aa_scrwidth(AA_context), aa_scrheight(AA_context)); |
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336 #else |
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337 /* Render only the rectangles in the list */ |
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338 printf("Update rects : "); |
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339 for ( i=0; i < numrects; ++i ) { |
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340 rect = &rects[i]; |
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341 printf("(%d,%d-%d,%d)", rect->x, rect->y, rect->w, rect->h); |
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342 aa_renderpalette(AA_context, AA_palette, AA_rparams, rect->x * AA_x_ratio, rect->y * AA_y_ratio, rect->w * AA_x_ratio, rect->h * AA_y_ratio); |
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343 } |
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344 printf("\n"); |
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345 #endif |
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346 SDL_mutexP(AA_mutex); |
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347 aa_flush(AA_context); |
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348 SDL_mutexV(AA_mutex); |
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349 return; |
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350 } |
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351 |
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352 int AA_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors) |
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353 { |
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354 int i; |
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355 |
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356 for ( i=0; i < ncolors; i++ ) { |
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357 aa_setpalette(AA_palette, firstcolor + i, |
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358 colors[i].r>>2, |
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359 colors[i].g>>2, |
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360 colors[i].b>>2); |
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361 } |
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362 return(1); |
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363 } |
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364 |
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365 /* Note: If we are terminated, this could be called in the middle of |
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366 another SDL video routine -- notably UpdateRects. |
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367 */ |
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368 void AA_VideoQuit(_THIS) |
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369 { |
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370 int i; |
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371 |
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372 aa_uninitkbd(AA_context); |
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373 aa_uninitmouse(AA_context); |
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374 |
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375 /* Free video mode lists */ |
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376 for ( i=0; i<SDL_NUMMODES; ++i ) { |
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377 if ( SDL_modelist[i] != NULL ) { |
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378 SDL_free(SDL_modelist[i]); |
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379 SDL_modelist[i] = NULL; |
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380 } |
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381 } |
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382 |
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383 aa_close(AA_context); |
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384 |
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385 SDL_DestroyMutex(AA_mutex); |
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386 |
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387 this->screen->pixels = NULL; |
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388 } |