| 1 | /* |
| 2 | SDL - Simple DirectMedia Layer |
| 3 | Copyright (C) 1997-2009 Sam Lantinga |
| 4 | |
| 5 | This library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Library General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2 of the License, or (at your option) any later version. |
| 9 | |
| 10 | This library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Library General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Library General Public |
| 16 | License along with this library; if not, write to the Free |
| 17 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 18 | |
| 19 | Sam Lantinga |
| 20 | slouken@libsdl.org |
| 21 | */ |
| 22 | #include "SDL_config.h" |
| 23 | |
| 24 | /* Atari OSMesa.ldg implementation of SDL OpenGL support */ |
| 25 | |
| 26 | /*--- Includes ---*/ |
| 27 | |
| 28 | #if SDL_VIDEO_OPENGL |
| 29 | #include <GL/osmesa.h> |
| 30 | #endif |
| 31 | |
| 32 | #include <mint/osbind.h> |
| 33 | |
| 34 | #include "SDL_endian.h" |
| 35 | #include "SDL_video.h" |
| 36 | #include "SDL_atarigl_c.h" |
| 37 | #if SDL_VIDEO_OPENGL_OSMESA_DYNAMIC |
| 38 | #include "SDL_loadso.h" |
| 39 | #endif |
| 40 | |
| 41 | /*--- Defines ---*/ |
| 42 | |
| 43 | #define PATH_OSMESA_LDG "osmesa.ldg" |
| 44 | #define PATH_MESAGL_LDG "mesa_gl.ldg" |
| 45 | #define PATH_TINYGL_LDG "tiny_gl.ldg" |
| 46 | |
| 47 | #define VDI_RGB 0xf |
| 48 | |
| 49 | /*--- Functions prototypes ---*/ |
| 50 | |
| 51 | static void SDL_AtariGL_UnloadLibrary(_THIS); |
| 52 | |
| 53 | #if SDL_VIDEO_OPENGL |
| 54 | static void CopyShadowNull(_THIS, SDL_Surface *surface); |
| 55 | static void CopyShadowDirect(_THIS, SDL_Surface *surface); |
| 56 | static void CopyShadowRGBTo555(_THIS, SDL_Surface *surface); |
| 57 | static void CopyShadowRGBTo565(_THIS, SDL_Surface *surface); |
| 58 | static void CopyShadowRGBSwap(_THIS, SDL_Surface *surface); |
| 59 | static void CopyShadowRGBToARGB(_THIS, SDL_Surface *surface); |
| 60 | static void CopyShadowRGBToABGR(_THIS, SDL_Surface *surface); |
| 61 | static void CopyShadowRGBToBGRA(_THIS, SDL_Surface *surface); |
| 62 | static void CopyShadowRGBToRGBA(_THIS, SDL_Surface *surface); |
| 63 | static void CopyShadow8888To555(_THIS, SDL_Surface *surface); |
| 64 | static void CopyShadow8888To565(_THIS, SDL_Surface *surface); |
| 65 | |
| 66 | static void ConvertNull(_THIS, SDL_Surface *surface); |
| 67 | static void Convert565To555be(_THIS, SDL_Surface *surface); |
| 68 | static void Convert565To555le(_THIS, SDL_Surface *surface); |
| 69 | static void Convert565le(_THIS, SDL_Surface *surface); |
| 70 | static void ConvertBGRAToABGR(_THIS, SDL_Surface *surface); |
| 71 | |
| 72 | static int InitNew(_THIS, SDL_Surface *current); |
| 73 | static int InitOld(_THIS, SDL_Surface *current); |
| 74 | #endif |
| 75 | |
| 76 | /*--- Public functions ---*/ |
| 77 | |
| 78 | int SDL_AtariGL_Init(_THIS, SDL_Surface *current) |
| 79 | { |
| 80 | #if SDL_VIDEO_OPENGL |
| 81 | if (gl_oldmesa) { |
| 82 | gl_active = InitOld(this, current); |
| 83 | } else { |
| 84 | gl_active = InitNew(this, current); |
| 85 | } |
| 86 | #endif |
| 87 | |
| 88 | return (gl_active); |
| 89 | } |
| 90 | |
| 91 | void SDL_AtariGL_Quit(_THIS, SDL_bool unload) |
| 92 | { |
| 93 | #if SDL_VIDEO_OPENGL |
| 94 | if (gl_oldmesa) { |
| 95 | /* Old mesa implementations */ |
| 96 | if (this->gl_data->OSMesaDestroyLDG) { |
| 97 | this->gl_data->OSMesaDestroyLDG(); |
| 98 | } |
| 99 | if (gl_shadow) { |
| 100 | Mfree(gl_shadow); |
| 101 | gl_shadow = NULL; |
| 102 | } |
| 103 | } else { |
| 104 | /* New mesa implementation */ |
| 105 | if (gl_ctx) { |
| 106 | if (this->gl_data->OSMesaDestroyContext) { |
| 107 | this->gl_data->OSMesaDestroyContext(gl_ctx); |
| 108 | } |
| 109 | gl_ctx = NULL; |
| 110 | } |
| 111 | } |
| 112 | |
| 113 | if (unload) { |
| 114 | SDL_AtariGL_UnloadLibrary(this); |
| 115 | } |
| 116 | |
| 117 | #endif /* SDL_VIDEO_OPENGL */ |
| 118 | gl_active = 0; |
| 119 | } |
| 120 | |
| 121 | int SDL_AtariGL_LoadLibrary(_THIS, const char *path) |
| 122 | { |
| 123 | #if SDL_VIDEO_OPENGL |
| 124 | |
| 125 | #if SDL_VIDEO_OPENGL_OSMESA_DYNAMIC |
| 126 | void *handle; |
| 127 | SDL_bool cancel_load; |
| 128 | |
| 129 | if (gl_active) { |
| 130 | SDL_SetError("OpenGL context already created"); |
| 131 | return -1; |
| 132 | } |
| 133 | |
| 134 | /* Unload previous driver */ |
| 135 | SDL_AtariGL_UnloadLibrary(this); |
| 136 | |
| 137 | /* Load library given by path */ |
| 138 | handle = SDL_LoadObject(path); |
| 139 | if (handle == NULL) { |
| 140 | /* Try to load another one */ |
| 141 | path = SDL_getenv("SDL_VIDEO_GL_DRIVER"); |
| 142 | if ( path != NULL ) { |
| 143 | handle = SDL_LoadObject(path); |
| 144 | } |
| 145 | |
| 146 | /* If it does not work, try some other */ |
| 147 | if (handle == NULL) { |
| 148 | path = PATH_OSMESA_LDG; |
| 149 | handle = SDL_LoadObject(path); |
| 150 | } |
| 151 | |
| 152 | if (handle == NULL) { |
| 153 | path = PATH_MESAGL_LDG; |
| 154 | handle = SDL_LoadObject(path); |
| 155 | } |
| 156 | |
| 157 | if (handle == NULL) { |
| 158 | path = PATH_TINYGL_LDG; |
| 159 | handle = SDL_LoadObject(path); |
| 160 | } |
| 161 | } |
| 162 | |
| 163 | if (handle == NULL) { |
| 164 | SDL_SetError("Could not load OpenGL library"); |
| 165 | return -1; |
| 166 | } |
| 167 | |
| 168 | this->gl_data->glGetIntegerv = SDL_LoadFunction(handle, "glGetIntegerv"); |
| 169 | this->gl_data->glFinish = SDL_LoadFunction(handle, "glFinish"); |
| 170 | this->gl_data->glFlush = SDL_LoadFunction(handle, "glFlush"); |
| 171 | |
| 172 | cancel_load = SDL_FALSE; |
| 173 | if (this->gl_data->glGetIntegerv == NULL) { |
| 174 | cancel_load = SDL_TRUE; |
| 175 | } else { |
| 176 | /* We need either glFinish (OSMesa) or glFlush (TinyGL) */ |
| 177 | if ((this->gl_data->glFinish == NULL) && |
| 178 | (this->gl_data->glFlush == NULL)) { |
| 179 | cancel_load = SDL_TRUE; |
| 180 | } |
| 181 | } |
| 182 | if (cancel_load) { |
| 183 | SDL_SetError("Could not retrieve OpenGL functions"); |
| 184 | SDL_UnloadObject(handle); |
| 185 | /* Restore pointers to static library */ |
| 186 | SDL_AtariGL_InitPointers(this); |
| 187 | return -1; |
| 188 | } |
| 189 | |
| 190 | /* Load functions pointers (osmesa.ldg) */ |
| 191 | this->gl_data->OSMesaCreateContextExt = SDL_LoadFunction(handle, "OSMesaCreateContextExt"); |
| 192 | this->gl_data->OSMesaDestroyContext = SDL_LoadFunction(handle, "OSMesaDestroyContext"); |
| 193 | this->gl_data->OSMesaMakeCurrent = SDL_LoadFunction(handle, "OSMesaMakeCurrent"); |
| 194 | this->gl_data->OSMesaPixelStore = SDL_LoadFunction(handle, "OSMesaPixelStore"); |
| 195 | this->gl_data->OSMesaGetProcAddress = SDL_LoadFunction(handle, "OSMesaGetProcAddress"); |
| 196 | |
| 197 | /* Load old functions pointers (mesa_gl.ldg, tiny_gl.ldg) */ |
| 198 | this->gl_data->OSMesaCreateLDG = SDL_LoadFunction(handle, "OSMesaCreateLDG"); |
| 199 | this->gl_data->OSMesaDestroyLDG = SDL_LoadFunction(handle, "OSMesaDestroyLDG"); |
| 200 | |
| 201 | gl_oldmesa = 0; |
| 202 | |
| 203 | if ( (this->gl_data->OSMesaCreateContextExt == NULL) || |
| 204 | (this->gl_data->OSMesaDestroyContext == NULL) || |
| 205 | (this->gl_data->OSMesaMakeCurrent == NULL) || |
| 206 | (this->gl_data->OSMesaPixelStore == NULL) || |
| 207 | (this->gl_data->OSMesaGetProcAddress == NULL)) { |
| 208 | /* Hum, maybe old library ? */ |
| 209 | if ( (this->gl_data->OSMesaCreateLDG == NULL) || |
| 210 | (this->gl_data->OSMesaDestroyLDG == NULL)) { |
| 211 | SDL_SetError("Could not retrieve OSMesa functions"); |
| 212 | SDL_UnloadObject(handle); |
| 213 | /* Restore pointers to static library */ |
| 214 | SDL_AtariGL_InitPointers(this); |
| 215 | return -1; |
| 216 | } else { |
| 217 | gl_oldmesa = 1; |
| 218 | } |
| 219 | } |
| 220 | |
| 221 | this->gl_config.dll_handle = handle; |
| 222 | if ( path ) { |
| 223 | SDL_strlcpy(this->gl_config.driver_path, path, |
| 224 | SDL_arraysize(this->gl_config.driver_path)); |
| 225 | } else { |
| 226 | *this->gl_config.driver_path = '\0'; |
| 227 | } |
| 228 | |
| 229 | #endif |
| 230 | this->gl_config.driver_loaded = 1; |
| 231 | |
| 232 | return 0; |
| 233 | #else |
| 234 | return -1; |
| 235 | #endif |
| 236 | } |
| 237 | |
| 238 | void *SDL_AtariGL_GetProcAddress(_THIS, const char *proc) |
| 239 | { |
| 240 | void *func = NULL; |
| 241 | #if SDL_VIDEO_OPENGL |
| 242 | |
| 243 | if (this->gl_config.dll_handle) { |
| 244 | func = SDL_LoadFunction(this->gl_config.dll_handle, (void *)proc); |
| 245 | } else if (this->gl_data->OSMesaGetProcAddress) { |
| 246 | func = this->gl_data->OSMesaGetProcAddress(proc); |
| 247 | } |
| 248 | |
| 249 | #endif |
| 250 | return func; |
| 251 | } |
| 252 | |
| 253 | int SDL_AtariGL_GetAttribute(_THIS, SDL_GLattr attrib, int* value) |
| 254 | { |
| 255 | #if SDL_VIDEO_OPENGL |
| 256 | GLenum mesa_attrib; |
| 257 | SDL_Surface *surface; |
| 258 | |
| 259 | if (!gl_active) { |
| 260 | return -1; |
| 261 | } |
| 262 | |
| 263 | switch(attrib) { |
| 264 | case SDL_GL_RED_SIZE: |
| 265 | mesa_attrib = GL_RED_BITS; |
| 266 | break; |
| 267 | case SDL_GL_GREEN_SIZE: |
| 268 | mesa_attrib = GL_GREEN_BITS; |
| 269 | break; |
| 270 | case SDL_GL_BLUE_SIZE: |
| 271 | mesa_attrib = GL_BLUE_BITS; |
| 272 | break; |
| 273 | case SDL_GL_ALPHA_SIZE: |
| 274 | mesa_attrib = GL_ALPHA_BITS; |
| 275 | break; |
| 276 | case SDL_GL_DOUBLEBUFFER: |
| 277 | surface = this->screen; |
| 278 | *value = ((surface->flags & SDL_DOUBLEBUF)==SDL_DOUBLEBUF); |
| 279 | return 0; |
| 280 | case SDL_GL_DEPTH_SIZE: |
| 281 | mesa_attrib = GL_DEPTH_BITS; |
| 282 | break; |
| 283 | case SDL_GL_STENCIL_SIZE: |
| 284 | mesa_attrib = GL_STENCIL_BITS; |
| 285 | break; |
| 286 | case SDL_GL_ACCUM_RED_SIZE: |
| 287 | mesa_attrib = GL_ACCUM_RED_BITS; |
| 288 | break; |
| 289 | case SDL_GL_ACCUM_GREEN_SIZE: |
| 290 | mesa_attrib = GL_ACCUM_GREEN_BITS; |
| 291 | break; |
| 292 | case SDL_GL_ACCUM_BLUE_SIZE: |
| 293 | mesa_attrib = GL_ACCUM_BLUE_BITS; |
| 294 | break; |
| 295 | case SDL_GL_ACCUM_ALPHA_SIZE: |
| 296 | mesa_attrib = GL_ACCUM_ALPHA_BITS; |
| 297 | break; |
| 298 | default : |
| 299 | return -1; |
| 300 | } |
| 301 | |
| 302 | this->gl_data->glGetIntegerv(mesa_attrib, value); |
| 303 | return 0; |
| 304 | #else |
| 305 | return -1; |
| 306 | #endif |
| 307 | } |
| 308 | |
| 309 | int SDL_AtariGL_MakeCurrent(_THIS) |
| 310 | { |
| 311 | #if SDL_VIDEO_OPENGL |
| 312 | SDL_Surface *surface; |
| 313 | GLenum type; |
| 314 | |
| 315 | if (gl_oldmesa && gl_active) { |
| 316 | return 0; |
| 317 | } |
| 318 | |
| 319 | if (this->gl_config.dll_handle) { |
| 320 | if ((this->gl_data->OSMesaMakeCurrent == NULL) || |
| 321 | (this->gl_data->OSMesaPixelStore == NULL)) { |
| 322 | return -1; |
| 323 | } |
| 324 | } |
| 325 | |
| 326 | if (!gl_active) { |
| 327 | SDL_SetError("Invalid OpenGL context"); |
| 328 | return -1; |
| 329 | } |
| 330 | |
| 331 | surface = this->screen; |
| 332 | |
| 333 | if ((surface->format->BitsPerPixel == 15) || (surface->format->BitsPerPixel == 16)) { |
| 334 | type = GL_UNSIGNED_SHORT_5_6_5; |
| 335 | } else { |
| 336 | type = GL_UNSIGNED_BYTE; |
| 337 | } |
| 338 | |
| 339 | if (!(this->gl_data->OSMesaMakeCurrent(gl_ctx, surface->pixels, type, surface->w, surface->h))) { |
| 340 | SDL_SetError("Can not make OpenGL context current"); |
| 341 | return -1; |
| 342 | } |
| 343 | |
| 344 | /* OSMesa draws upside down */ |
| 345 | this->gl_data->OSMesaPixelStore(OSMESA_Y_UP, 0); |
| 346 | |
| 347 | return 0; |
| 348 | #else |
| 349 | return -1; |
| 350 | #endif |
| 351 | } |
| 352 | |
| 353 | void SDL_AtariGL_SwapBuffers(_THIS) |
| 354 | { |
| 355 | #if SDL_VIDEO_OPENGL |
| 356 | if (gl_active) { |
| 357 | if (this->gl_config.dll_handle) { |
| 358 | if (this->gl_data->glFinish) { |
| 359 | this->gl_data->glFinish(); |
| 360 | } else if (this->gl_data->glFlush) { |
| 361 | this->gl_data->glFlush(); |
| 362 | } |
| 363 | } else { |
| 364 | this->gl_data->glFinish(); |
| 365 | } |
| 366 | gl_copyshadow(this, this->screen); |
| 367 | gl_convert(this, this->screen); |
| 368 | } |
| 369 | #endif |
| 370 | } |
| 371 | |
| 372 | void SDL_AtariGL_InitPointers(_THIS) |
| 373 | { |
| 374 | #if SDL_VIDEO_OPENGL |
| 375 | this->gl_data->OSMesaCreateContextExt = OSMesaCreateContextExt; |
| 376 | this->gl_data->OSMesaDestroyContext = OSMesaDestroyContext; |
| 377 | this->gl_data->OSMesaMakeCurrent = OSMesaMakeCurrent; |
| 378 | this->gl_data->OSMesaPixelStore = OSMesaPixelStore; |
| 379 | this->gl_data->OSMesaGetProcAddress = OSMesaGetProcAddress; |
| 380 | |
| 381 | this->gl_data->glGetIntegerv = glGetIntegerv; |
| 382 | this->gl_data->glFinish = glFinish; |
| 383 | this->gl_data->glFlush = glFlush; |
| 384 | |
| 385 | this->gl_data->OSMesaCreateLDG = NULL; |
| 386 | this->gl_data->OSMesaDestroyLDG = NULL; |
| 387 | #endif |
| 388 | } |
| 389 | |
| 390 | /*--- Private functions ---*/ |
| 391 | |
| 392 | static void SDL_AtariGL_UnloadLibrary(_THIS) |
| 393 | { |
| 394 | #if SDL_VIDEO_OPENGL |
| 395 | if (this->gl_config.dll_handle) { |
| 396 | SDL_UnloadObject(this->gl_config.dll_handle); |
| 397 | this->gl_config.dll_handle = NULL; |
| 398 | |
| 399 | /* Restore pointers to static library */ |
| 400 | SDL_AtariGL_InitPointers(this); |
| 401 | } |
| 402 | #endif |
| 403 | } |
| 404 | |
| 405 | /*--- Creation of an OpenGL context using new/old functions ---*/ |
| 406 | |
| 407 | #if SDL_VIDEO_OPENGL |
| 408 | static int InitNew(_THIS, SDL_Surface *current) |
| 409 | { |
| 410 | GLenum osmesa_format; |
| 411 | SDL_PixelFormat *pixel_format; |
| 412 | Uint32 redmask; |
| 413 | int recreatecontext; |
| 414 | GLint newaccumsize; |
| 415 | |
| 416 | if (this->gl_config.dll_handle) { |
| 417 | if (this->gl_data->OSMesaCreateContextExt == NULL) { |
| 418 | return 0; |
| 419 | } |
| 420 | } |
| 421 | |
| 422 | /* Init OpenGL context using OSMesa */ |
| 423 | gl_convert = ConvertNull; |
| 424 | gl_copyshadow = CopyShadowNull; |
| 425 | gl_upsidedown = SDL_FALSE; |
| 426 | |
| 427 | pixel_format = current->format; |
| 428 | redmask = pixel_format->Rmask; |
| 429 | switch (pixel_format->BitsPerPixel) { |
| 430 | case 15: |
| 431 | /* 1555, big and little endian, unsupported */ |
| 432 | gl_pixelsize = 2; |
| 433 | osmesa_format = OSMESA_RGB_565; |
| 434 | if (redmask == 31<<10) { |
| 435 | gl_convert = Convert565To555be; |
| 436 | } else { |
| 437 | gl_convert = Convert565To555le; |
| 438 | } |
| 439 | break; |
| 440 | case 16: |
| 441 | gl_pixelsize = 2; |
| 442 | if (redmask == 31<<11) { |
| 443 | osmesa_format = OSMESA_RGB_565; |
| 444 | } else { |
| 445 | /* 565, little endian, unsupported */ |
| 446 | osmesa_format = OSMESA_RGB_565; |
| 447 | gl_convert = Convert565le; |
| 448 | } |
| 449 | break; |
| 450 | case 24: |
| 451 | gl_pixelsize = 3; |
| 452 | if (redmask == 255<<16) { |
| 453 | osmesa_format = OSMESA_RGB; |
| 454 | } else { |
| 455 | osmesa_format = OSMESA_BGR; |
| 456 | } |
| 457 | break; |
| 458 | case 32: |
| 459 | gl_pixelsize = 4; |
| 460 | if (redmask == 255<<16) { |
| 461 | osmesa_format = OSMESA_ARGB; |
| 462 | } else if (redmask == 255<<8) { |
| 463 | osmesa_format = OSMESA_BGRA; |
| 464 | } else if (redmask == 255<<24) { |
| 465 | osmesa_format = OSMESA_RGBA; |
| 466 | } else { |
| 467 | /* ABGR format unsupported */ |
| 468 | osmesa_format = OSMESA_BGRA; |
| 469 | gl_convert = ConvertBGRAToABGR; |
| 470 | } |
| 471 | break; |
| 472 | default: |
| 473 | gl_pixelsize = 1; |
| 474 | osmesa_format = OSMESA_COLOR_INDEX; |
| 475 | break; |
| 476 | } |
| 477 | |
| 478 | /* Try to keep current context if possible */ |
| 479 | newaccumsize = |
| 480 | this->gl_config.accum_red_size + |
| 481 | this->gl_config.accum_green_size + |
| 482 | this->gl_config.accum_blue_size + |
| 483 | this->gl_config.accum_alpha_size; |
| 484 | recreatecontext=1; |
| 485 | if (gl_ctx && |
| 486 | (gl_curformat == osmesa_format) && |
| 487 | (gl_curdepth == this->gl_config.depth_size) && |
| 488 | (gl_curstencil == this->gl_config.stencil_size) && |
| 489 | (gl_curaccum == newaccumsize)) { |
| 490 | recreatecontext = 0; |
| 491 | } |
| 492 | if (recreatecontext) { |
| 493 | SDL_AtariGL_Quit(this, SDL_FALSE); |
| 494 | |
| 495 | gl_ctx = this->gl_data->OSMesaCreateContextExt( |
| 496 | osmesa_format, this->gl_config.depth_size, |
| 497 | this->gl_config.stencil_size, newaccumsize, NULL ); |
| 498 | |
| 499 | if (gl_ctx) { |
| 500 | gl_curformat = osmesa_format; |
| 501 | gl_curdepth = this->gl_config.depth_size; |
| 502 | gl_curstencil = this->gl_config.stencil_size; |
| 503 | gl_curaccum = newaccumsize; |
| 504 | } else { |
| 505 | gl_curformat = 0; |
| 506 | gl_curdepth = 0; |
| 507 | gl_curstencil = 0; |
| 508 | gl_curaccum = 0; |
| 509 | } |
| 510 | } |
| 511 | |
| 512 | return (gl_ctx != NULL); |
| 513 | } |
| 514 | |
| 515 | |
| 516 | static int InitOld(_THIS, SDL_Surface *current) |
| 517 | { |
| 518 | GLenum osmesa_format; |
| 519 | SDL_PixelFormat *pixel_format; |
| 520 | Uint32 redmask; |
| 521 | int recreatecontext, tinygl_present; |
| 522 | |
| 523 | if (this->gl_config.dll_handle) { |
| 524 | if (this->gl_data->OSMesaCreateLDG == NULL) { |
| 525 | return 0; |
| 526 | } |
| 527 | } |
| 528 | |
| 529 | /* TinyGL only supports VDI_RGB (OSMESA_RGB) */ |
| 530 | tinygl_present=0; |
| 531 | if (this->gl_config.dll_handle) { |
| 532 | if (this->gl_data->glFinish == NULL) { |
| 533 | tinygl_present=1; |
| 534 | } |
| 535 | } |
| 536 | |
| 537 | /* Init OpenGL context using OSMesa */ |
| 538 | gl_convert = ConvertNull; |
| 539 | gl_copyshadow = CopyShadowNull; |
| 540 | gl_upsidedown = SDL_FALSE; |
| 541 | |
| 542 | pixel_format = current->format; |
| 543 | redmask = pixel_format->Rmask; |
| 544 | switch (pixel_format->BitsPerPixel) { |
| 545 | case 15: |
| 546 | /* 15 bits unsupported */ |
| 547 | if (tinygl_present) { |
| 548 | gl_pixelsize = 3; |
| 549 | osmesa_format = VDI_RGB; |
| 550 | if (redmask == 31<<10) { |
| 551 | gl_copyshadow = CopyShadowRGBTo555; |
| 552 | } else { |
| 553 | gl_copyshadow = CopyShadowRGBTo565; |
| 554 | gl_convert = Convert565To555le; |
| 555 | } |
| 556 | } else { |
| 557 | gl_pixelsize = 4; |
| 558 | gl_upsidedown = SDL_TRUE; |
| 559 | osmesa_format = OSMESA_ARGB; |
| 560 | if (redmask == 31<<10) { |
| 561 | gl_copyshadow = CopyShadow8888To555; |
| 562 | } else { |
| 563 | gl_copyshadow = CopyShadow8888To565; |
| 564 | gl_convert = Convert565To555le; |
| 565 | } |
| 566 | } |
| 567 | break; |
| 568 | case 16: |
| 569 | /* 16 bits unsupported */ |
| 570 | if (tinygl_present) { |
| 571 | gl_pixelsize = 3; |
| 572 | osmesa_format = VDI_RGB; |
| 573 | gl_copyshadow = CopyShadowRGBTo565; |
| 574 | if (redmask != 31<<11) { |
| 575 | /* 565, little endian, unsupported */ |
| 576 | gl_convert = Convert565le; |
| 577 | } |
| 578 | } else { |
| 579 | gl_pixelsize = 4; |
| 580 | gl_upsidedown = SDL_TRUE; |
| 581 | osmesa_format = OSMESA_ARGB; |
| 582 | gl_copyshadow = CopyShadow8888To565; |
| 583 | if (redmask != 31<<11) { |
| 584 | /* 565, little endian, unsupported */ |
| 585 | gl_convert = Convert565le; |
| 586 | } |
| 587 | } |
| 588 | break; |
| 589 | case 24: |
| 590 | gl_pixelsize = 3; |
| 591 | if (tinygl_present) { |
| 592 | osmesa_format = VDI_RGB; |
| 593 | gl_copyshadow = CopyShadowDirect; |
| 594 | if (redmask != 255<<16) { |
| 595 | gl_copyshadow = CopyShadowRGBSwap; |
| 596 | } |
| 597 | } else { |
| 598 | gl_copyshadow = CopyShadowDirect; |
| 599 | gl_upsidedown = SDL_TRUE; |
| 600 | if (redmask == 255<<16) { |
| 601 | osmesa_format = OSMESA_RGB; |
| 602 | } else { |
| 603 | osmesa_format = OSMESA_BGR; |
| 604 | } |
| 605 | } |
| 606 | break; |
| 607 | case 32: |
| 608 | if (tinygl_present) { |
| 609 | gl_pixelsize = 3; |
| 610 | osmesa_format = VDI_RGB; |
| 611 | gl_copyshadow = CopyShadowRGBToARGB; |
| 612 | if (redmask == 255) { |
| 613 | gl_convert = CopyShadowRGBToABGR; |
| 614 | } else if (redmask == 255<<8) { |
| 615 | gl_convert = CopyShadowRGBToBGRA; |
| 616 | } else if (redmask == 255<<24) { |
| 617 | gl_convert = CopyShadowRGBToRGBA; |
| 618 | } |
| 619 | } else { |
| 620 | gl_pixelsize = 4; |
| 621 | gl_upsidedown = SDL_TRUE; |
| 622 | gl_copyshadow = CopyShadowDirect; |
| 623 | if (redmask == 255<<16) { |
| 624 | osmesa_format = OSMESA_ARGB; |
| 625 | } else if (redmask == 255<<8) { |
| 626 | osmesa_format = OSMESA_BGRA; |
| 627 | } else if (redmask == 255<<24) { |
| 628 | osmesa_format = OSMESA_RGBA; |
| 629 | } else { |
| 630 | /* ABGR format unsupported */ |
| 631 | osmesa_format = OSMESA_BGRA; |
| 632 | gl_convert = ConvertBGRAToABGR; |
| 633 | } |
| 634 | } |
| 635 | break; |
| 636 | default: |
| 637 | if (tinygl_present) { |
| 638 | SDL_AtariGL_Quit(this, SDL_FALSE); |
| 639 | return 0; |
| 640 | } |
| 641 | gl_pixelsize = 1; |
| 642 | gl_copyshadow = CopyShadowDirect; |
| 643 | osmesa_format = OSMESA_COLOR_INDEX; |
| 644 | break; |
| 645 | } |
| 646 | |
| 647 | /* Try to keep current context if possible */ |
| 648 | recreatecontext=1; |
| 649 | if (gl_shadow && |
| 650 | (gl_curformat == osmesa_format) && |
| 651 | (gl_curwidth == current->w) && |
| 652 | (gl_curheight == current->h)) { |
| 653 | recreatecontext = 0; |
| 654 | } |
| 655 | if (recreatecontext) { |
| 656 | SDL_AtariGL_Quit(this, SDL_FALSE); |
| 657 | |
| 658 | gl_shadow = this->gl_data->OSMesaCreateLDG( |
| 659 | osmesa_format, GL_UNSIGNED_BYTE, current->w, current->h |
| 660 | ); |
| 661 | |
| 662 | if (gl_shadow) { |
| 663 | gl_curformat = osmesa_format; |
| 664 | gl_curwidth = current->w; |
| 665 | gl_curheight = current->h; |
| 666 | } else { |
| 667 | gl_curformat = 0; |
| 668 | gl_curwidth = 0; |
| 669 | gl_curheight = 0; |
| 670 | } |
| 671 | } |
| 672 | |
| 673 | return (gl_shadow != NULL); |
| 674 | } |
| 675 | |
| 676 | /*--- Conversions routines from shadow buffer to the screen ---*/ |
| 677 | |
| 678 | static void CopyShadowNull(_THIS, SDL_Surface *surface) |
| 679 | { |
| 680 | } |
| 681 | |
| 682 | static void CopyShadowDirect(_THIS, SDL_Surface *surface) |
| 683 | { |
| 684 | int y, srcpitch, dstpitch; |
| 685 | Uint8 *srcline, *dstline; |
| 686 | |
| 687 | srcline = gl_shadow; |
| 688 | srcpitch = surface->w * gl_pixelsize; |
| 689 | dstline = surface->pixels; |
| 690 | dstpitch = surface->pitch; |
| 691 | if (gl_upsidedown) { |
| 692 | srcline += (surface->h-1)*srcpitch; |
| 693 | srcpitch = -srcpitch; |
| 694 | } |
| 695 | |
| 696 | for (y=0; y<surface->h; y++) { |
| 697 | SDL_memcpy(dstline, srcline, srcpitch); |
| 698 | |
| 699 | srcline += srcpitch; |
| 700 | dstline += dstpitch; |
| 701 | } |
| 702 | } |
| 703 | |
| 704 | static void CopyShadowRGBTo555(_THIS, SDL_Surface *surface) |
| 705 | { |
| 706 | int x,y, srcpitch, dstpitch; |
| 707 | Uint16 *dstline, *dstcol; |
| 708 | Uint8 *srcline, *srccol; |
| 709 | |
| 710 | srcline = (Uint8 *)gl_shadow; |
| 711 | srcpitch = surface->w * gl_pixelsize; |
| 712 | dstline = surface->pixels; |
| 713 | dstpitch = surface->pitch >>1; |
| 714 | if (gl_upsidedown) { |
| 715 | srcline += (surface->h-1)*srcpitch; |
| 716 | srcpitch = -srcpitch; |
| 717 | } |
| 718 | |
| 719 | for (y=0; y<surface->h; y++) { |
| 720 | srccol = srcline; |
| 721 | dstcol = dstline; |
| 722 | for (x=0; x<surface->w; x++) { |
| 723 | Uint16 dstcolor; |
| 724 | |
| 725 | dstcolor = ((*srccol++)<<7) & (31<<10); |
| 726 | dstcolor |= ((*srccol++)<<2) & (31<<5); |
| 727 | dstcolor |= ((*srccol++)>>3) & 31; |
| 728 | *dstcol++ = dstcolor; |
| 729 | } |
| 730 | |
| 731 | srcline += srcpitch; |
| 732 | dstline += dstpitch; |
| 733 | } |
| 734 | } |
| 735 | |
| 736 | static void CopyShadowRGBTo565(_THIS, SDL_Surface *surface) |
| 737 | { |
| 738 | int x,y, srcpitch, dstpitch; |
| 739 | Uint16 *dstline, *dstcol; |
| 740 | Uint8 *srcline, *srccol; |
| 741 | |
| 742 | srcline = (Uint8 *)gl_shadow; |
| 743 | srcpitch = surface->w * gl_pixelsize; |
| 744 | dstline = surface->pixels; |
| 745 | dstpitch = surface->pitch >>1; |
| 746 | if (gl_upsidedown) { |
| 747 | srcline += (surface->h-1)*srcpitch; |
| 748 | srcpitch = -srcpitch; |
| 749 | } |
| 750 | |
| 751 | for (y=0; y<surface->h; y++) { |
| 752 | srccol = srcline; |
| 753 | dstcol = dstline; |
| 754 | |
| 755 | for (x=0; x<surface->w; x++) { |
| 756 | Uint16 dstcolor; |
| 757 | |
| 758 | dstcolor = ((*srccol++)<<8) & (31<<11); |
| 759 | dstcolor |= ((*srccol++)<<3) & (63<<5); |
| 760 | dstcolor |= ((*srccol++)>>3) & 31; |
| 761 | *dstcol++ = dstcolor; |
| 762 | } |
| 763 | |
| 764 | srcline += srcpitch; |
| 765 | dstline += dstpitch; |
| 766 | } |
| 767 | } |
| 768 | |
| 769 | static void CopyShadowRGBSwap(_THIS, SDL_Surface *surface) |
| 770 | { |
| 771 | int x,y, srcpitch, dstpitch; |
| 772 | Uint8 *dstline, *dstcol; |
| 773 | Uint8 *srcline, *srccol; |
| 774 | |
| 775 | srcline = (Uint8 *)gl_shadow; |
| 776 | srcpitch = surface->w * gl_pixelsize; |
| 777 | dstline = surface->pixels; |
| 778 | dstpitch = surface->pitch; |
| 779 | if (gl_upsidedown) { |
| 780 | srcline += (surface->h-1)*srcpitch; |
| 781 | srcpitch = -srcpitch; |
| 782 | } |
| 783 | |
| 784 | for (y=0; y<surface->h; y++) { |
| 785 | srccol = srcline; |
| 786 | dstcol = dstline; |
| 787 | |
| 788 | for (x=0; x<surface->w; x++) { |
| 789 | *dstcol++ = srccol[2]; |
| 790 | *dstcol++ = srccol[1]; |
| 791 | *dstcol++ = srccol[0]; |
| 792 | srccol += 3; |
| 793 | } |
| 794 | |
| 795 | srcline += srcpitch; |
| 796 | dstline += dstpitch; |
| 797 | } |
| 798 | } |
| 799 | |
| 800 | static void CopyShadowRGBToARGB(_THIS, SDL_Surface *surface) |
| 801 | { |
| 802 | int x,y, srcpitch, dstpitch; |
| 803 | Uint32 *dstline, *dstcol; |
| 804 | Uint8 *srcline, *srccol; |
| 805 | |
| 806 | srcline = (Uint8 *)gl_shadow; |
| 807 | srcpitch = surface->w * gl_pixelsize; |
| 808 | dstline = surface->pixels; |
| 809 | dstpitch = surface->pitch >>2; |
| 810 | if (gl_upsidedown) { |
| 811 | srcline += (surface->h-1)*srcpitch; |
| 812 | srcpitch = -srcpitch; |
| 813 | } |
| 814 | |
| 815 | for (y=0; y<surface->h; y++) { |
| 816 | srccol = srcline; |
| 817 | dstcol = dstline; |
| 818 | |
| 819 | for (x=0; x<surface->w; x++) { |
| 820 | Uint32 dstcolor; |
| 821 | |
| 822 | dstcolor = (*srccol++)<<16; |
| 823 | dstcolor |= (*srccol++)<<8; |
| 824 | dstcolor |= *srccol++; |
| 825 | |
| 826 | *dstcol++ = dstcolor; |
| 827 | } |
| 828 | |
| 829 | srcline += srcpitch; |
| 830 | dstline += dstpitch; |
| 831 | } |
| 832 | } |
| 833 | |
| 834 | static void CopyShadowRGBToABGR(_THIS, SDL_Surface *surface) |
| 835 | { |
| 836 | int x,y, srcpitch, dstpitch; |
| 837 | Uint32 *dstline, *dstcol; |
| 838 | Uint8 *srcline, *srccol; |
| 839 | |
| 840 | srcline = (Uint8 *)gl_shadow; |
| 841 | srcpitch = surface->w * gl_pixelsize; |
| 842 | dstline = surface->pixels; |
| 843 | dstpitch = surface->pitch >>2; |
| 844 | if (gl_upsidedown) { |
| 845 | srcline += (surface->h-1)*srcpitch; |
| 846 | srcpitch = -srcpitch; |
| 847 | } |
| 848 | |
| 849 | for (y=0; y<surface->h; y++) { |
| 850 | srccol = srcline; |
| 851 | dstcol = dstline; |
| 852 | |
| 853 | for (x=0; x<surface->w; x++) { |
| 854 | Uint32 dstcolor; |
| 855 | |
| 856 | dstcolor = *srccol++; |
| 857 | dstcolor |= (*srccol++)<<8; |
| 858 | dstcolor |= (*srccol++)<<16; |
| 859 | |
| 860 | *dstcol++ = dstcolor; |
| 861 | } |
| 862 | |
| 863 | srcline += srcpitch; |
| 864 | dstline += dstpitch; |
| 865 | } |
| 866 | } |
| 867 | |
| 868 | static void CopyShadowRGBToBGRA(_THIS, SDL_Surface *surface) |
| 869 | { |
| 870 | int x,y, srcpitch, dstpitch; |
| 871 | Uint32 *dstline, *dstcol; |
| 872 | Uint8 *srcline, *srccol; |
| 873 | |
| 874 | srcline = (Uint8 *)gl_shadow; |
| 875 | srcpitch = surface->w * gl_pixelsize; |
| 876 | dstline = surface->pixels; |
| 877 | dstpitch = surface->pitch >>2; |
| 878 | if (gl_upsidedown) { |
| 879 | srcline += (surface->h-1)*srcpitch; |
| 880 | srcpitch = -srcpitch; |
| 881 | } |
| 882 | |
| 883 | for (y=0; y<surface->h; y++) { |
| 884 | srccol = srcline; |
| 885 | dstcol = dstline; |
| 886 | |
| 887 | for (x=0; x<surface->w; x++) { |
| 888 | Uint32 dstcolor; |
| 889 | |
| 890 | dstcolor = (*srccol++)<<8; |
| 891 | dstcolor |= (*srccol++)<<16; |
| 892 | dstcolor |= (*srccol++)<<24; |
| 893 | |
| 894 | *dstcol++ = dstcolor; |
| 895 | } |
| 896 | |
| 897 | srcline += srcpitch; |
| 898 | dstline += dstpitch; |
| 899 | } |
| 900 | } |
| 901 | |
| 902 | static void CopyShadowRGBToRGBA(_THIS, SDL_Surface *surface) |
| 903 | { |
| 904 | int x,y, srcpitch, dstpitch; |
| 905 | Uint32 *dstline, *dstcol; |
| 906 | Uint8 *srcline, *srccol; |
| 907 | |
| 908 | srcline = (Uint8 *)gl_shadow; |
| 909 | srcpitch = surface->w * gl_pixelsize; |
| 910 | dstline = surface->pixels; |
| 911 | dstpitch = surface->pitch >>2; |
| 912 | if (gl_upsidedown) { |
| 913 | srcline += (surface->h-1)*srcpitch; |
| 914 | srcpitch = -srcpitch; |
| 915 | } |
| 916 | |
| 917 | for (y=0; y<surface->h; y++) { |
| 918 | srccol = srcline; |
| 919 | dstcol = dstline; |
| 920 | |
| 921 | for (x=0; x<surface->w; x++) { |
| 922 | Uint32 dstcolor; |
| 923 | |
| 924 | dstcolor = (*srccol++)<<24; |
| 925 | dstcolor |= (*srccol++)<<16; |
| 926 | dstcolor |= (*srccol++)<<8; |
| 927 | |
| 928 | *dstcol++ = dstcolor; |
| 929 | } |
| 930 | |
| 931 | srcline += srcpitch; |
| 932 | dstline += dstpitch; |
| 933 | } |
| 934 | } |
| 935 | |
| 936 | static void CopyShadow8888To555(_THIS, SDL_Surface *surface) |
| 937 | { |
| 938 | int x,y, srcpitch, dstpitch; |
| 939 | Uint16 *dstline, *dstcol; |
| 940 | Uint32 *srcline, *srccol; |
| 941 | |
| 942 | srcline = (Uint32 *)gl_shadow; |
| 943 | srcpitch = (surface->w * gl_pixelsize) >>2; |
| 944 | dstline = surface->pixels; |
| 945 | dstpitch = surface->pitch >>1; |
| 946 | if (gl_upsidedown) { |
| 947 | srcline += (surface->h-1)*srcpitch; |
| 948 | srcpitch = -srcpitch; |
| 949 | } |
| 950 | |
| 951 | for (y=0; y<surface->h; y++) { |
| 952 | srccol = srcline; |
| 953 | dstcol = dstline; |
| 954 | for (x=0; x<surface->w; x++) { |
| 955 | Uint32 srccolor; |
| 956 | Uint16 dstcolor; |
| 957 | |
| 958 | srccolor = *srccol++; |
| 959 | dstcolor = (srccolor>>9) & (31<<10); |
| 960 | dstcolor |= (srccolor>>6) & (31<<5); |
| 961 | dstcolor |= (srccolor>>3) & 31; |
| 962 | *dstcol++ = dstcolor; |
| 963 | } |
| 964 | |
| 965 | srcline += srcpitch; |
| 966 | dstline += dstpitch; |
| 967 | } |
| 968 | } |
| 969 | |
| 970 | static void CopyShadow8888To565(_THIS, SDL_Surface *surface) |
| 971 | { |
| 972 | int x,y, srcpitch, dstpitch; |
| 973 | Uint16 *dstline, *dstcol; |
| 974 | Uint32 *srcline, *srccol; |
| 975 | |
| 976 | srcline = (Uint32 *)gl_shadow; |
| 977 | srcpitch = (surface->w * gl_pixelsize) >> 2; |
| 978 | dstline = surface->pixels; |
| 979 | dstpitch = surface->pitch >>1; |
| 980 | if (gl_upsidedown) { |
| 981 | srcline += (surface->h-1)*srcpitch; |
| 982 | srcpitch = -srcpitch; |
| 983 | } |
| 984 | |
| 985 | for (y=0; y<surface->h; y++) { |
| 986 | srccol = srcline; |
| 987 | dstcol = dstline; |
| 988 | |
| 989 | for (x=0; x<surface->w; x++) { |
| 990 | Uint32 srccolor; |
| 991 | Uint16 dstcolor; |
| 992 | |
| 993 | srccolor = *srccol++; |
| 994 | dstcolor = (srccolor>>8) & (31<<11); |
| 995 | dstcolor |= (srccolor>>5) & (63<<5); |
| 996 | dstcolor |= (srccolor>>3) & 31; |
| 997 | *dstcol++ = dstcolor; |
| 998 | } |
| 999 | |
| 1000 | srcline += srcpitch; |
| 1001 | dstline += dstpitch; |
| 1002 | } |
| 1003 | } |
| 1004 | |
| 1005 | /*--- Conversions routines in the screen ---*/ |
| 1006 | |
| 1007 | static void ConvertNull(_THIS, SDL_Surface *surface) |
| 1008 | { |
| 1009 | } |
| 1010 | |
| 1011 | static void Convert565To555be(_THIS, SDL_Surface *surface) |
| 1012 | { |
| 1013 | int x,y, pitch; |
| 1014 | unsigned short *line, *pixel; |
| 1015 | |
| 1016 | line = surface->pixels; |
| 1017 | pitch = surface->pitch >> 1; |
| 1018 | for (y=0; y<surface->h; y++) { |
| 1019 | pixel = line; |
| 1020 | for (x=0; x<surface->w; x++) { |
| 1021 | unsigned short color = *pixel; |
| 1022 | |
| 1023 | *pixel++ = (color & 0x1f)|((color>>1) & 0xffe0); |
| 1024 | } |
| 1025 | |
| 1026 | line += pitch; |
| 1027 | } |
| 1028 | } |
| 1029 | |
| 1030 | static void Convert565To555le(_THIS, SDL_Surface *surface) |
| 1031 | { |
| 1032 | int x,y, pitch; |
| 1033 | unsigned short *line, *pixel; |
| 1034 | |
| 1035 | line = surface->pixels; |
| 1036 | pitch = surface->pitch >>1; |
| 1037 | for (y=0; y<surface->h; y++) { |
| 1038 | pixel = line; |
| 1039 | for (x=0; x<surface->w; x++) { |
| 1040 | unsigned short color = *pixel; |
| 1041 | |
| 1042 | color = (color & 0x1f)|((color>>1) & 0xffe0); |
| 1043 | *pixel++ = SDL_Swap16(color); |
| 1044 | } |
| 1045 | |
| 1046 | line += pitch; |
| 1047 | } |
| 1048 | } |
| 1049 | |
| 1050 | static void Convert565le(_THIS, SDL_Surface *surface) |
| 1051 | { |
| 1052 | int x,y, pitch; |
| 1053 | unsigned short *line, *pixel; |
| 1054 | |
| 1055 | line = surface->pixels; |
| 1056 | pitch = surface->pitch >>1; |
| 1057 | for (y=0; y<surface->h; y++) { |
| 1058 | pixel = line; |
| 1059 | for (x=0; x<surface->w; x++) { |
| 1060 | unsigned short color = *pixel; |
| 1061 | |
| 1062 | *pixel++ = SDL_Swap16(color); |
| 1063 | } |
| 1064 | |
| 1065 | line += pitch; |
| 1066 | } |
| 1067 | } |
| 1068 | |
| 1069 | static void ConvertBGRAToABGR(_THIS, SDL_Surface *surface) |
| 1070 | { |
| 1071 | int x,y, pitch; |
| 1072 | unsigned long *line, *pixel; |
| 1073 | |
| 1074 | line = surface->pixels; |
| 1075 | pitch = surface->pitch >>2; |
| 1076 | for (y=0; y<surface->h; y++) { |
| 1077 | pixel = line; |
| 1078 | for (x=0; x<surface->w; x++) { |
| 1079 | unsigned long color = *pixel; |
| 1080 | |
| 1081 | *pixel++ = (color<<24)|(color>>8); |
| 1082 | } |
| 1083 | |
| 1084 | line += pitch; |
| 1085 | } |
| 1086 | } |
| 1087 | |
| 1088 | #endif /* SDL_VIDEO_OPENGL */ |