Mercurial > sdl-ios-xcode
annotate src/video/ggi/SDL_ggivideo.c @ 1557:61c237f69076
Fixed bug #90
The palette -> RGBA blit wasn't following the rule:
* RGB->RGBA:
* SDL_SRCALPHA not set:
* copy RGB, set destination alpha to source per-surface alpha value.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 20 Mar 2006 06:37:58 +0000 |
| parents | 8d9bb0cf2c2a |
| children | 782fd950bd46 c121d94672cb a1b03ba2fcd0 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 SDL - Simple DirectMedia Layer |
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3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 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. |
| 0 | 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. |
| 0 | 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 |
| 0 | 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" |
| 0 | 23 |
| 24 /* GGI-based SDL video driver implementation. | |
| 25 */ | |
| 26 | |
| 27 #include <fcntl.h> | |
| 28 #include <unistd.h> | |
| 29 #include <sys/mman.h> | |
| 30 | |
| 31 #include <ggi/ggi.h> | |
| 32 #include <ggi/gii.h> | |
| 33 | |
| 34 #include "SDL_video.h" | |
| 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" |
| 0 | 39 #include "SDL_ggivideo.h" |
| 40 #include "SDL_ggimouse_c.h" | |
| 41 #include "SDL_ggievents_c.h" | |
| 42 | |
| 43 | |
| 44 struct private_hwdata | |
| 45 { | |
| 46 ggi_visual_t vis; | |
| 47 }; | |
| 48 | |
| 49 ggi_visual_t VIS; | |
| 50 | |
| 51 /* Initialization/Query functions */ | |
| 52 static int GGI_VideoInit(_THIS, SDL_PixelFormat *vformat); | |
| 53 static SDL_Rect **GGI_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags); | |
| 54 static SDL_Surface *GGI_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags); | |
| 55 static int GGI_SetColors(_THIS, int firstcolor, int ncolors, | |
| 56 SDL_Color *colors); | |
| 57 static void GGI_VideoQuit(_THIS); | |
| 58 | |
| 59 /* Hardware surface functions */ | |
| 60 static int GGI_AllocHWSurface(_THIS, SDL_Surface *surface); | |
| 61 static int GGI_LockHWSurface(_THIS, SDL_Surface *surface); | |
| 62 static void GGI_UnlockHWSurface(_THIS, SDL_Surface *surface); | |
| 63 static void GGI_FreeHWSurface(_THIS, SDL_Surface *surface); | |
| 64 | |
| 65 /* GGI driver bootstrap functions */ | |
| 66 | |
| 67 static int GGI_Available(void) | |
| 68 { | |
| 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 } |
| 0 | 77 } |
| 78 return (vis != NULL); | |
| 79 } | |
| 80 | |
| 81 static void GGI_DeleteDevice(SDL_VideoDevice *device) | |
| 82 { | |
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83 SDL_free(device->hidden); |
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84 SDL_free(device); |
| 0 | 85 } |
| 86 | |
| 87 static SDL_VideoDevice *GGI_CreateDevice(int devindex) | |
| 88 { | |
| 89 SDL_VideoDevice *device; | |
| 90 | |
| 91 /* Initialize all variables that we clean on shutdown */ | |
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92 device = (SDL_VideoDevice *)SDL_malloc(sizeof(SDL_VideoDevice)); |
| 0 | 93 if ( device ) { |
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94 SDL_memset(device, 0, (sizeof *device)); |
| 0 | 95 device->hidden = (struct SDL_PrivateVideoData *) |
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96 SDL_malloc((sizeof *device->hidden)); |
| 0 | 97 } |
| 98 if ( (device == NULL) || (device->hidden == NULL) ) { | |
| 99 SDL_OutOfMemory(); | |
| 100 if ( device ) { | |
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101 SDL_free(device); |
| 0 | 102 } |
| 103 return(0); | |
| 104 } | |
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105 SDL_memset(device->hidden, 0, (sizeof *device->hidden)); |
| 0 | 106 |
| 107 /* Set the function pointers */ | |
| 108 device->VideoInit = GGI_VideoInit; | |
| 109 device->ListModes = GGI_ListModes; | |
| 110 device->SetVideoMode = GGI_SetVideoMode; | |
| 111 device->SetColors = GGI_SetColors; | |
| 112 device->UpdateRects = NULL; | |
| 113 device->VideoQuit = GGI_VideoQuit; | |
| 114 device->AllocHWSurface = GGI_AllocHWSurface; | |
| 115 device->CheckHWBlit = NULL; | |
| 116 device->FillHWRect = NULL; | |
| 117 device->SetHWColorKey = NULL; | |
| 118 device->SetHWAlpha = NULL; | |
| 119 device->LockHWSurface = GGI_LockHWSurface; | |
| 120 device->UnlockHWSurface = GGI_UnlockHWSurface; | |
| 121 device->FlipHWSurface = NULL; | |
| 122 device->FreeHWSurface = GGI_FreeHWSurface; | |
| 123 device->SetCaption = NULL; | |
| 124 device->SetIcon = NULL; | |
| 125 device->IconifyWindow = NULL; | |
| 126 device->GrabInput = NULL; | |
| 127 device->GetWMInfo = NULL; | |
| 128 device->InitOSKeymap = GGI_InitOSKeymap; | |
| 129 device->PumpEvents = GGI_PumpEvents; | |
| 130 | |
| 131 device->free = GGI_DeleteDevice; | |
| 132 | |
| 133 return device; | |
| 134 } | |
| 135 | |
| 136 VideoBootStrap GGI_bootstrap = { | |
| 137 "ggi", "General Graphics Interface (GGI)", | |
| 138 GGI_Available, GGI_CreateDevice | |
| 139 }; | |
| 140 | |
| 141 | |
| 142 static SDL_Rect video_mode; | |
| 143 static SDL_Rect *SDL_modelist[4] = { NULL, NULL, NULL, NULL }; | |
| 144 | |
| 145 int GGI_VideoInit(_THIS, SDL_PixelFormat *vformat) | |
| 146 { | |
| 147 ggi_mode mode = | |
| 148 { | |
| 149 1, | |
| 150 { GGI_AUTO, GGI_AUTO }, | |
| 151 { GGI_AUTO, GGI_AUTO }, | |
| 152 { 0, 0 }, | |
| 153 GT_AUTO, | |
| 154 { GGI_AUTO, GGI_AUTO } | |
| 155 }; | |
| 156 struct private_hwdata *priv; | |
| 157 ggi_color pal[256], map[256]; | |
| 158 const ggi_directbuffer *db; | |
| 159 int err, num_bufs; | |
| 160 ggi_pixel white, black; | |
| 161 | |
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162 priv = SDL_malloc(sizeof(struct private_hwdata)); |
| 0 | 163 if (priv == NULL) |
| 164 { | |
| 165 SDL_SetError("Unhandled GGI mode type!\n"); | |
| 166 GGI_VideoQuit(NULL); | |
| 167 } | |
| 168 | |
| 169 if (ggiInit() != 0) | |
| 170 { | |
| 171 SDL_SetError("Unable to initialize GGI!\n"); | |
| 172 GGI_VideoQuit(NULL); | |
| 173 } | |
| 174 | |
| 175 VIS = ggiOpen(NULL); | |
| 176 if (VIS == NULL) | |
| 177 { | |
| 178 SDL_SetError("Unable to open default GGI visual!\n"); | |
| 179 ggiExit(); | |
| 180 GGI_VideoQuit(NULL); | |
| 181 } | |
| 182 | |
| 183 ggiSetFlags(VIS, GGIFLAG_ASYNC); | |
| 184 | |
| 185 /* Validate mode, autodetecting any GGI_AUTO or GT_AUTO fields */ | |
| 186 ggiCheckMode(VIS, &mode); | |
| 187 | |
| 188 /* At this point we should have a valid mode - try to set it */ | |
| 189 err = ggiSetMode(VIS, &mode); | |
| 190 | |
| 191 /* If we couldn't set _any_ modes, something is very wrong */ | |
| 192 if (err) | |
| 193 { | |
| 194 SDL_SetError("Can't set a mode!\n"); | |
| 195 ggiClose(VIS); | |
| 196 ggiExit(); | |
| 197 GGI_VideoQuit(NULL); | |
| 198 } | |
| 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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Added current_w and current_h to the SDL_VideoInfo structure, which is set to the desktop resolution during video intialization, and then set to the current resolution when a video mode is set.
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203 |
| 0 | 204 /* Set a palette for palletized modes */ |
| 205 if (GT_SCHEME(mode.graphtype) == GT_PALETTE) | |
| 206 { | |
| 207 ggiSetColorfulPalette(VIS); | |
| 208 ggiGetPalette(VIS, 0, 1 << vformat->BitsPerPixel, pal); | |
| 209 } | |
| 210 | |
| 211 /* Now we try to get the DirectBuffer info, which determines whether | |
| 212 * SDL can access hardware surfaces directly. */ | |
| 213 | |
| 214 num_bufs = ggiDBGetNumBuffers(VIS); | |
| 215 | |
| 216 if (num_bufs > 0) | |
| 217 { | |
| 218 db = ggiDBGetBuffer(VIS, 0); /* Only handle one DB for now */ | |
| 219 | |
| 220 vformat->BitsPerPixel = db->buffer.plb.pixelformat->depth; | |
| 221 | |
| 222 vformat->Rmask = db->buffer.plb.pixelformat->red_mask; | |
| 223 vformat->Gmask = db->buffer.plb.pixelformat->green_mask; | |
| 224 vformat->Bmask = db->buffer.plb.pixelformat->blue_mask; | |
| 225 | |
| 226 /* Fill in our hardware acceleration capabilities */ | |
| 227 | |
| 228 this->info.wm_available = 0; | |
| 229 this->info.hw_available = 1; | |
| 230 this->info.video_mem = db->buffer.plb.stride * mode.virt.y; | |
| 231 } | |
| 232 | |
| 233 video_mode.x = 0; | |
| 234 video_mode.y = 0; | |
| 235 video_mode.w = mode.virt.x; | |
| 236 video_mode.h = mode.virt.y; | |
| 237 SDL_modelist[((vformat->BitsPerPixel + 7) / 8) - 1] = &video_mode; | |
| 238 | |
| 239 /* We're done! */ | |
| 240 return(0); | |
| 241 } | |
| 242 | |
| 243 static SDL_Rect **GGI_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags) | |
| 244 { | |
| 245 return(&SDL_modelist[((format->BitsPerPixel + 7) / 8) - 1]); | |
| 246 } | |
| 247 | |
| 248 /* Various screen update functions available */ | |
| 249 static void GGI_DirectUpdate(_THIS, int numrects, SDL_Rect *rects); | |
| 250 | |
| 251 SDL_Surface *GGI_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags) | |
| 252 { | |
| 253 ggi_mode mode = | |
| 254 { | |
| 255 1, | |
| 256 { GGI_AUTO, GGI_AUTO }, | |
| 257 { GGI_AUTO, GGI_AUTO }, | |
| 258 { 0, 0 }, | |
| 259 GT_AUTO, | |
| 260 { GGI_AUTO, GGI_AUTO } | |
| 261 }; | |
| 262 const ggi_directbuffer *db; | |
| 263 ggi_color pal[256]; | |
| 264 int err; | |
| 265 | |
| 266 fprintf(stderr, "GGI_SetVideoMode()\n"); | |
| 267 | |
| 268 mode.visible.x = mode.virt.x = width; | |
| 269 mode.visible.y = mode.virt.y = height; | |
| 270 | |
| 271 /* Translate requested SDL bit depth into a GGI mode */ | |
| 272 switch (bpp) | |
| 273 { | |
| 274 case 1: mode.graphtype = GT_1BIT; break; | |
| 275 case 2: mode.graphtype = GT_2BIT; break; | |
| 276 case 4: mode.graphtype = GT_4BIT; break; | |
| 277 case 8: mode.graphtype = GT_8BIT; break; | |
| 278 case 15: mode.graphtype = GT_15BIT; break; | |
| 279 case 16: mode.graphtype = GT_16BIT; break; | |
| 280 case 24: mode.graphtype = GT_24BIT; break; | |
| 281 case 32: mode.graphtype = GT_32BIT; break; | |
| 282 default: | |
| 283 SDL_SetError("Unknown SDL bit depth, using GT_AUTO....\n"); | |
| 284 mode.graphtype = GT_AUTO; | |
| 285 } | |
| 286 | |
| 287 /* Validate mode, autodetecting any GGI_AUTO or GT_AUTO fields */ | |
| 288 ggiCheckMode(VIS, &mode); | |
| 289 | |
| 290 /* At this point we should have a valid mode - try to set it */ | |
| 291 err = ggiSetMode(VIS, &mode); | |
| 292 | |
| 293 /* If we couldn't set _any_ modes, something is very wrong */ | |
| 294 if (err) | |
| 295 { | |
| 296 SDL_SetError("Can't set a mode!\n"); | |
| 297 ggiClose(VIS); | |
| 298 ggiExit(); | |
| 299 GGI_VideoQuit(NULL); | |
| 300 } | |
| 301 | |
| 302 /* Set a palette for palletized modes */ | |
| 303 if (GT_SCHEME(mode.graphtype) == GT_PALETTE) | |
| 304 { | |
| 305 ggiSetColorfulPalette(VIS); | |
| 306 ggiGetPalette(VIS, 0, 1 << bpp, pal); | |
| 307 } | |
| 308 | |
| 309 db = ggiDBGetBuffer(VIS, 0); | |
| 310 | |
| 311 /* Set up the new mode framebuffer */ | |
| 312 current->flags = (SDL_FULLSCREEN | SDL_HWSURFACE); | |
| 313 current->w = mode.virt.x; | |
| 314 current->h = mode.virt.y; | |
| 315 current->pitch = db->buffer.plb.stride; | |
| 316 current->pixels = db->read; | |
| 317 | |
| 318 /* Set the blit function */ | |
| 319 this->UpdateRects = GGI_DirectUpdate; | |
| 320 | |
| 321 /* We're done */ | |
| 322 return(current); | |
| 323 } | |
| 324 | |
| 325 static int GGI_AllocHWSurface(_THIS, SDL_Surface *surface) | |
| 326 { | |
| 327 return(-1); | |
| 328 } | |
| 329 static void GGI_FreeHWSurface(_THIS, SDL_Surface *surface) | |
| 330 { | |
| 331 return; | |
| 332 } | |
| 333 static int GGI_LockHWSurface(_THIS, SDL_Surface *surface) | |
| 334 { | |
| 335 return(0); | |
| 336 } | |
| 337 static void GGI_UnlockHWSurface(_THIS, SDL_Surface *surface) | |
| 338 { | |
| 339 return; | |
| 340 } | |
| 341 | |
| 342 static void GGI_DirectUpdate(_THIS, int numrects, SDL_Rect *rects) | |
| 343 { | |
| 344 int i; | |
| 345 | |
| 346 /* ggiFlush(VIS); */ | |
| 347 | |
| 348 for (i = 0; i < numrects; i++) | |
| 349 { | |
| 350 ggiFlushRegion(VIS, rects[i].x, rects[i].y, rects[i].w, rects[i].h); | |
| 351 } | |
| 352 return; | |
| 353 } | |
| 354 | |
| 355 int GGI_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors) | |
| 356 { | |
| 357 int i; | |
| 358 ggi_color pal[256]; | |
| 359 | |
| 360 /* Set up the colormap */ | |
| 361 for (i = 0; i < ncolors; i++) | |
| 362 { | |
| 363 pal[i].r = (colors[i].r << 8) | colors[i].r; | |
| 364 pal[i].g = (colors[i].g << 8) | colors[i].g; | |
| 365 pal[i].b = (colors[i].b << 8) | colors[i].b; | |
| 366 } | |
| 367 | |
| 368 ggiSetPalette(VIS, firstcolor, ncolors, pal); | |
| 369 | |
| 370 return 1; | |
| 371 } | |
| 372 | |
| 373 void GGI_VideoQuit(_THIS) | |
| 374 { | |
| 375 } | |
| 376 void GGI_FinalQuit(void) | |
| 377 { | |
| 378 } |