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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 /* GGI-based SDL video driver implementation. |
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25 */ |
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26 |
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27 #include <fcntl.h> |
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28 #include <unistd.h> |
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29 #include <sys/mman.h> |
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30 |
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31 #include <ggi/ggi.h> |
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32 #include <ggi/gii.h> |
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33 |
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34 #include "SDL_video.h" |
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35 #include "SDL_mouse.h" |
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36 #include "../SDL_sysvideo.h" |
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37 #include "../SDL_pixels_c.h" |
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38 #include "../../events/SDL_events_c.h" |
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39 #include "SDL_ggivideo.h" |
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40 #include "SDL_ggimouse_c.h" |
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41 #include "SDL_ggievents_c.h" |
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42 |
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43 |
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44 struct private_hwdata |
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45 { |
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46 ggi_visual_t vis; |
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47 }; |
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48 |
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49 ggi_visual_t VIS; |
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50 |
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51 /* Initialization/Query functions */ |
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52 static int GGI_VideoInit(_THIS, SDL_PixelFormat *vformat); |
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53 static SDL_Rect **GGI_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags); |
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54 static SDL_Surface *GGI_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags); |
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55 static int GGI_SetColors(_THIS, int firstcolor, int ncolors, |
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56 SDL_Color *colors); |
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57 static void GGI_VideoQuit(_THIS); |
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58 |
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59 /* Hardware surface functions */ |
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60 static int GGI_AllocHWSurface(_THIS, SDL_Surface *surface); |
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61 static int GGI_LockHWSurface(_THIS, SDL_Surface *surface); |
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62 static void GGI_UnlockHWSurface(_THIS, SDL_Surface *surface); |
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63 static void GGI_FreeHWSurface(_THIS, SDL_Surface *surface); |
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64 |
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65 /* GGI driver bootstrap functions */ |
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66 |
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67 static int GGI_Available(void) |
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68 { |
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69 ggi_visual_t *vis; |
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70 |
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71 vis = NULL; |
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72 if (ggiInit() == 0) { |
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73 vis = ggiOpen(NULL); |
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74 if (vis != NULL) { |
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75 ggiClose(vis); |
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76 } |
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77 } |
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78 return (vis != NULL); |
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79 } |
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80 |
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81 static void GGI_DeleteDevice(SDL_VideoDevice *device) |
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82 { |
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83 SDL_free(device->hidden); |
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84 SDL_free(device); |
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85 } |
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86 |
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87 static SDL_VideoDevice *GGI_CreateDevice(int devindex) |
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88 { |
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89 SDL_VideoDevice *device; |
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90 |
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91 /* Initialize all variables that we clean on shutdown */ |
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92 device = (SDL_VideoDevice *)SDL_malloc(sizeof(SDL_VideoDevice)); |
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93 if ( device ) { |
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94 SDL_memset(device, 0, (sizeof *device)); |
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95 device->hidden = (struct SDL_PrivateVideoData *) |
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96 SDL_malloc((sizeof *device->hidden)); |
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97 } |
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98 if ( (device == NULL) || (device->hidden == NULL) ) { |
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99 SDL_OutOfMemory(); |
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100 if ( device ) { |
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101 SDL_free(device); |
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102 } |
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103 return(0); |
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104 } |
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105 SDL_memset(device->hidden, 0, (sizeof *device->hidden)); |
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106 |
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107 /* Set the function pointers */ |
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108 device->VideoInit = GGI_VideoInit; |
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109 device->ListModes = GGI_ListModes; |
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110 device->SetVideoMode = GGI_SetVideoMode; |
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111 device->SetColors = GGI_SetColors; |
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112 device->UpdateRects = NULL; |
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113 device->VideoQuit = GGI_VideoQuit; |
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114 device->AllocHWSurface = GGI_AllocHWSurface; |
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115 device->CheckHWBlit = NULL; |
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116 device->FillHWRect = NULL; |
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117 device->SetHWColorKey = NULL; |
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118 device->SetHWAlpha = NULL; |
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119 device->LockHWSurface = GGI_LockHWSurface; |
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120 device->UnlockHWSurface = GGI_UnlockHWSurface; |
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121 device->FlipHWSurface = NULL; |
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122 device->FreeHWSurface = GGI_FreeHWSurface; |
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123 device->SetCaption = NULL; |
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124 device->SetIcon = NULL; |
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125 device->IconifyWindow = NULL; |
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126 device->GrabInput = NULL; |
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127 device->GetWMInfo = NULL; |
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128 device->InitOSKeymap = GGI_InitOSKeymap; |
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129 device->PumpEvents = GGI_PumpEvents; |
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130 |
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131 device->free = GGI_DeleteDevice; |
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132 |
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133 return device; |
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134 } |
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135 |
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136 VideoBootStrap GGI_bootstrap = { |
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137 "ggi", "General Graphics Interface (GGI)", |
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138 GGI_Available, GGI_CreateDevice |
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139 }; |
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140 |
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141 |
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142 static SDL_Rect video_mode; |
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143 static SDL_Rect *SDL_modelist[4] = { NULL, NULL, NULL, NULL }; |
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144 |
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145 int GGI_VideoInit(_THIS, SDL_PixelFormat *vformat) |
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146 { |
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147 ggi_mode mode = |
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148 { |
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149 1, |
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150 { GGI_AUTO, GGI_AUTO }, |
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151 { GGI_AUTO, GGI_AUTO }, |
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152 { 0, 0 }, |
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153 GT_AUTO, |
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154 { GGI_AUTO, GGI_AUTO } |
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155 }; |
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156 struct private_hwdata *priv; |
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157 ggi_color pal[256], map[256]; |
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158 const ggi_directbuffer *db; |
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159 int err, num_bufs; |
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160 ggi_pixel white, black; |
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161 |
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162 priv = SDL_malloc(sizeof(struct private_hwdata)); |
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163 if (priv == NULL) |
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164 { |
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165 SDL_SetError("Unhandled GGI mode type!\n"); |
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166 GGI_VideoQuit(NULL); |
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167 } |
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168 |
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169 if (ggiInit() != 0) |
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170 { |
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171 SDL_SetError("Unable to initialize GGI!\n"); |
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172 GGI_VideoQuit(NULL); |
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173 } |
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174 |
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175 VIS = ggiOpen(NULL); |
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176 if (VIS == NULL) |
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177 { |
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178 SDL_SetError("Unable to open default GGI visual!\n"); |
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179 ggiExit(); |
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180 GGI_VideoQuit(NULL); |
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181 } |
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182 |
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183 ggiSetFlags(VIS, GGIFLAG_ASYNC); |
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184 |
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185 /* Validate mode, autodetecting any GGI_AUTO or GT_AUTO fields */ |
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186 ggiCheckMode(VIS, &mode); |
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187 |
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188 /* At this point we should have a valid mode - try to set it */ |
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189 err = ggiSetMode(VIS, &mode); |
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190 |
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191 /* If we couldn't set _any_ modes, something is very wrong */ |
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192 if (err) |
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193 { |
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194 SDL_SetError("Can't set a mode!\n"); |
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195 ggiClose(VIS); |
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196 ggiExit(); |
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197 GGI_VideoQuit(NULL); |
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198 } |
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199 |
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200 /* Determine the current screen size */ |
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201 this->info.current_w = mode.virt.x; |
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202 this->info.current_h = mode.virt.y; |
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203 |
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204 /* Set a palette for palletized modes */ |
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205 if (GT_SCHEME(mode.graphtype) == GT_PALETTE) |
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206 { |
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207 ggiSetColorfulPalette(VIS); |
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208 ggiGetPalette(VIS, 0, 1 << vformat->BitsPerPixel, pal); |
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209 } |
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210 |
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211 /* Now we try to get the DirectBuffer info, which determines whether |
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212 * SDL can access hardware surfaces directly. */ |
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213 |
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214 num_bufs = ggiDBGetNumBuffers(VIS); |
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215 |
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216 if (num_bufs > 0) |
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217 { |
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218 db = ggiDBGetBuffer(VIS, 0); /* Only handle one DB for now */ |
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219 |
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220 vformat->BitsPerPixel = db->buffer.plb.pixelformat->depth; |
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221 |
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222 vformat->Rmask = db->buffer.plb.pixelformat->red_mask; |
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223 vformat->Gmask = db->buffer.plb.pixelformat->green_mask; |
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224 vformat->Bmask = db->buffer.plb.pixelformat->blue_mask; |
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225 |
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226 /* Fill in our hardware acceleration capabilities */ |
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227 |
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228 this->info.wm_available = 0; |
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229 this->info.hw_available = 1; |
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230 this->info.video_mem = db->buffer.plb.stride * mode.virt.y; |
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231 } |
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232 |
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233 video_mode.x = 0; |
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234 video_mode.y = 0; |
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235 video_mode.w = mode.virt.x; |
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236 video_mode.h = mode.virt.y; |
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237 SDL_modelist[((vformat->BitsPerPixel + 7) / 8) - 1] = &video_mode; |
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238 |
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239 /* We're done! */ |
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240 return(0); |
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241 } |
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242 |
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243 static SDL_Rect **GGI_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags) |
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244 { |
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245 return(&SDL_modelist[((format->BitsPerPixel + 7) / 8) - 1]); |
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246 } |
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247 |
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248 /* Various screen update functions available */ |
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249 static void GGI_DirectUpdate(_THIS, int numrects, SDL_Rect *rects); |
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250 |
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251 SDL_Surface *GGI_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags) |
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252 { |
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253 ggi_mode mode = |
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254 { |
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255 1, |
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256 { GGI_AUTO, GGI_AUTO }, |
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257 { GGI_AUTO, GGI_AUTO }, |
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258 { 0, 0 }, |
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259 GT_AUTO, |
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260 { GGI_AUTO, GGI_AUTO } |
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261 }; |
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262 const ggi_directbuffer *db; |
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263 ggi_color pal[256]; |
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264 int err; |
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265 |
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266 fprintf(stderr, "GGI_SetVideoMode()\n"); |
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267 |
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268 mode.visible.x = mode.virt.x = width; |
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269 mode.visible.y = mode.virt.y = height; |
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270 |
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271 /* Translate requested SDL bit depth into a GGI mode */ |
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272 switch (bpp) |
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273 { |
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274 case 1: mode.graphtype = GT_1BIT; break; |
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275 case 2: mode.graphtype = GT_2BIT; break; |
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276 case 4: mode.graphtype = GT_4BIT; break; |
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277 case 8: mode.graphtype = GT_8BIT; break; |
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278 case 15: mode.graphtype = GT_15BIT; break; |
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279 case 16: mode.graphtype = GT_16BIT; break; |
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280 case 24: mode.graphtype = GT_24BIT; break; |
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281 case 32: mode.graphtype = GT_32BIT; break; |
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282 default: |
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283 SDL_SetError("Unknown SDL bit depth, using GT_AUTO....\n"); |
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284 mode.graphtype = GT_AUTO; |
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285 } |
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286 |
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287 /* Validate mode, autodetecting any GGI_AUTO or GT_AUTO fields */ |
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288 ggiCheckMode(VIS, &mode); |
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289 |
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290 /* At this point we should have a valid mode - try to set it */ |
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291 err = ggiSetMode(VIS, &mode); |
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292 |
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293 /* If we couldn't set _any_ modes, something is very wrong */ |
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294 if (err) |
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295 { |
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296 SDL_SetError("Can't set a mode!\n"); |
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297 ggiClose(VIS); |
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298 ggiExit(); |
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299 GGI_VideoQuit(NULL); |
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300 } |
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301 |
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302 /* Set a palette for palletized modes */ |
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303 if (GT_SCHEME(mode.graphtype) == GT_PALETTE) |
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304 { |
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305 ggiSetColorfulPalette(VIS); |
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306 ggiGetPalette(VIS, 0, 1 << bpp, pal); |
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307 } |
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308 |
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309 db = ggiDBGetBuffer(VIS, 0); |
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310 |
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311 /* Set up the new mode framebuffer */ |
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312 current->flags = (SDL_FULLSCREEN | SDL_HWSURFACE); |
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313 current->w = mode.virt.x; |
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314 current->h = mode.virt.y; |
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315 current->pitch = db->buffer.plb.stride; |
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316 current->pixels = db->read; |
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317 |
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318 /* Set the blit function */ |
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319 this->UpdateRects = GGI_DirectUpdate; |
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320 |
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321 /* We're done */ |
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322 return(current); |
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323 } |
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324 |
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325 static int GGI_AllocHWSurface(_THIS, SDL_Surface *surface) |
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326 { |
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327 return(-1); |
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328 } |
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329 static void GGI_FreeHWSurface(_THIS, SDL_Surface *surface) |
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330 { |
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331 return; |
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332 } |
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333 static int GGI_LockHWSurface(_THIS, SDL_Surface *surface) |
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334 { |
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335 return(0); |
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336 } |
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337 static void GGI_UnlockHWSurface(_THIS, SDL_Surface *surface) |
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338 { |
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339 return; |
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340 } |
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341 |
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342 static void GGI_DirectUpdate(_THIS, int numrects, SDL_Rect *rects) |
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343 { |
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344 int i; |
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345 |
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346 /* ggiFlush(VIS); */ |
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347 |
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348 for (i = 0; i < numrects; i++) |
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349 { |
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350 ggiFlushRegion(VIS, rects[i].x, rects[i].y, rects[i].w, rects[i].h); |
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351 } |
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352 return; |
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353 } |
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354 |
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355 int GGI_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors) |
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356 { |
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357 int i; |
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358 ggi_color pal[256]; |
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359 |
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360 /* Set up the colormap */ |
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361 for (i = 0; i < ncolors; i++) |
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362 { |
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363 pal[i].r = (colors[i].r << 8) | colors[i].r; |
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364 pal[i].g = (colors[i].g << 8) | colors[i].g; |
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365 pal[i].b = (colors[i].b << 8) | colors[i].b; |
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366 } |
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367 |
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368 ggiSetPalette(VIS, firstcolor, ncolors, pal); |
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369 |
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370 return 1; |
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371 } |
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372 |
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373 void GGI_VideoQuit(_THIS) |
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374 { |
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375 } |
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376 void GGI_FinalQuit(void) |
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377 { |
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378 } |