xm_api.c revision c37872d8c02c5c875b1570d8eaa1fe5de0380b53
1/* 2 * Mesa 3-D graphics library 3 * Version: 7.1 4 * 5 * Copyright (C) 1999-2007 Brian Paul All Rights Reserved. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a 8 * copy of this software and associated documentation files (the "Software"), 9 * to deal in the Software without restriction, including without limitation 10 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 11 * and/or sell copies of the Software, and to permit persons to whom the 12 * Software is furnished to do so, subject to the following conditions: 13 * 14 * The above copyright notice and this permission notice shall be included 15 * in all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN 21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 23 */ 24 25/** 26 * \file xm_api.c 27 * 28 * All the XMesa* API functions. 29 * 30 * 31 * NOTES: 32 * 33 * The window coordinate system origin (0,0) is in the lower-left corner 34 * of the window. X11's window coordinate origin is in the upper-left 35 * corner of the window. Therefore, most drawing functions in this 36 * file have to flip Y coordinates. 37 * 38 * Define USE_XSHM in the Makefile with -DUSE_XSHM if you want to compile 39 * in support for the MIT Shared Memory extension. If enabled, when you 40 * use an Ximage for the back buffer in double buffered mode, the "swap" 41 * operation will be faster. You must also link with -lXext. 42 * 43 * Byte swapping: If the Mesa host and the X display use a different 44 * byte order then there's some trickiness to be aware of when using 45 * XImages. The byte ordering used for the XImage is that of the X 46 * display, not the Mesa host. 47 * The color-to-pixel encoding for True/DirectColor must be done 48 * according to the display's visual red_mask, green_mask, and blue_mask. 49 * If XPutPixel is used to put a pixel into an XImage then XPutPixel will 50 * do byte swapping if needed. If one wants to directly "poke" the pixel 51 * into the XImage's buffer then the pixel must be byte swapped first. In 52 * Mesa, when byte swapping is needed we use the PF_TRUECOLOR pixel format 53 * and use XPutPixel everywhere except in the implementation of 54 * glClear(GL_COLOR_BUFFER_BIT). We want this function to be fast so 55 * instead of using XPutPixel we "poke" our values after byte-swapping 56 * the clear pixel value if needed. 57 * 58 */ 59 60#ifdef __CYGWIN__ 61#undef WIN32 62#undef __WIN32__ 63#endif 64 65#include "glxheader.h" 66#include "xmesaP.h" 67#include "main/context.h" 68#include "main/extensions.h" 69#include "main/framebuffer.h" 70#include "main/imports.h" 71#include "main/macros.h" 72#include "main/renderbuffer.h" 73#include "main/teximage.h" 74#include "glapi/glthread.h" 75#include "swrast/swrast.h" 76#include "swrast_setup/swrast_setup.h" 77#include "vbo/vbo.h" 78#include "tnl/tnl.h" 79#include "tnl/t_context.h" 80#include "tnl/t_pipeline.h" 81#include "drivers/common/driverfuncs.h" 82 83/** 84 * Global X driver lock 85 */ 86_glthread_Mutex _xmesa_lock; 87 88 89 90/** 91 * Lookup tables for HPCR pixel format: 92 */ 93static short hpcr_rgbTbl[3][256] = { 94{ 95 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 96 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 97 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 98 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 99 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 100 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 101 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 102 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 103112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 104128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 105144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 106160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 107176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 108192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 109208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 110224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 111}, 112{ 113 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 114 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 115 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 116 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 117 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 118 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 119 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 120 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 121112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 122128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 123144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 124160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 125176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 126192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 127208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 128224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 129}, 130{ 131 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 132 40, 40, 41, 41, 42, 42, 43, 43, 44, 44, 45, 45, 46, 46, 47, 47, 133 48, 48, 49, 49, 50, 50, 51, 51, 52, 52, 53, 53, 54, 54, 55, 55, 134 56, 56, 57, 57, 58, 58, 59, 59, 60, 60, 61, 61, 62, 62, 63, 63, 135 64, 64, 65, 65, 66, 66, 67, 67, 68, 68, 69, 69, 70, 70, 71, 71, 136 72, 72, 73, 73, 74, 74, 75, 75, 76, 76, 77, 77, 78, 78, 79, 79, 137 80, 80, 81, 81, 82, 82, 83, 83, 84, 84, 85, 85, 86, 86, 87, 87, 138 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 139 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 140112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 141128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 142144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 143160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 144176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 145192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 146208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223 147} 148}; 149 150 151 152/**********************************************************************/ 153/***** X Utility Functions *****/ 154/**********************************************************************/ 155 156 157/** 158 * Return the host's byte order as LSBFirst or MSBFirst ala X. 159 */ 160#ifndef XFree86Server 161static int host_byte_order( void ) 162{ 163 int i = 1; 164 char *cptr = (char *) &i; 165 return (*cptr==1) ? LSBFirst : MSBFirst; 166} 167#endif 168 169 170/** 171 * Check if the X Shared Memory extension is available. 172 * Return: 0 = not available 173 * 1 = shared XImage support available 174 * 2 = shared Pixmap support available also 175 */ 176static int check_for_xshm( XMesaDisplay *display ) 177{ 178#if defined(USE_XSHM) && !defined(XFree86Server) 179 int major, minor, ignore; 180 Bool pixmaps; 181 182 if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) { 183 if (XShmQueryVersion( display, &major, &minor, &pixmaps )==True) { 184 return (pixmaps==True) ? 2 : 1; 185 } 186 else { 187 return 0; 188 } 189 } 190 else { 191 return 0; 192 } 193#else 194 /* No XSHM support */ 195 return 0; 196#endif 197} 198 199 200/** 201 * Apply gamma correction to an intensity value in [0..max]. Return the 202 * new intensity value. 203 */ 204static GLint 205gamma_adjust( GLfloat gamma, GLint value, GLint max ) 206{ 207 if (gamma == 1.0) { 208 return value; 209 } 210 else { 211 double x = (double) value / (double) max; 212 return IROUND_POS((GLfloat) max * _mesa_pow(x, 1.0F/gamma)); 213 } 214} 215 216 217 218/** 219 * Return the true number of bits per pixel for XImages. 220 * For example, if we request a 24-bit deep visual we may actually need/get 221 * 32bpp XImages. This function returns the appropriate bpp. 222 * Input: dpy - the X display 223 * visinfo - desribes the visual to be used for XImages 224 * Return: true number of bits per pixel for XImages 225 */ 226static int 227bits_per_pixel( XMesaVisual xmv ) 228{ 229#ifdef XFree86Server 230 const int depth = xmv->nplanes; 231 int i; 232 assert(depth > 0); 233 for (i = 0; i < screenInfo.numPixmapFormats; i++) { 234 if (screenInfo.formats[i].depth == depth) 235 return screenInfo.formats[i].bitsPerPixel; 236 } 237 return depth; /* should never get here, but this should be safe */ 238#else 239 XMesaDisplay *dpy = xmv->display; 240 XMesaVisualInfo visinfo = xmv->visinfo; 241 XMesaImage *img; 242 int bitsPerPixel; 243 /* Create a temporary XImage */ 244 img = XCreateImage( dpy, visinfo->visual, visinfo->depth, 245 ZPixmap, 0, /*format, offset*/ 246 (char*) MALLOC(8), /*data*/ 247 1, 1, /*width, height*/ 248 32, /*bitmap_pad*/ 249 0 /*bytes_per_line*/ 250 ); 251 assert(img); 252 /* grab the bits/pixel value */ 253 bitsPerPixel = img->bits_per_pixel; 254 /* free the XImage */ 255 _mesa_free( img->data ); 256 img->data = NULL; 257 XMesaDestroyImage( img ); 258 return bitsPerPixel; 259#endif 260} 261 262 263 264/* 265 * Determine if a given X window ID is valid (window exists). 266 * Do this by calling XGetWindowAttributes() for the window and 267 * checking if we catch an X error. 268 * Input: dpy - the display 269 * win - the window to check for existance 270 * Return: GL_TRUE - window exists 271 * GL_FALSE - window doesn't exist 272 */ 273#ifndef XFree86Server 274static GLboolean WindowExistsFlag; 275 276static int window_exists_err_handler( XMesaDisplay* dpy, XErrorEvent* xerr ) 277{ 278 (void) dpy; 279 if (xerr->error_code == BadWindow) { 280 WindowExistsFlag = GL_FALSE; 281 } 282 return 0; 283} 284 285static GLboolean window_exists( XMesaDisplay *dpy, Window win ) 286{ 287 XWindowAttributes wa; 288 int (*old_handler)( XMesaDisplay*, XErrorEvent* ); 289 WindowExistsFlag = GL_TRUE; 290 old_handler = XSetErrorHandler(window_exists_err_handler); 291 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */ 292 XSetErrorHandler(old_handler); 293 return WindowExistsFlag; 294} 295 296static Status 297get_drawable_size( XMesaDisplay *dpy, Drawable d, GLuint *width, GLuint *height ) 298{ 299 Window root; 300 Status stat; 301 int xpos, ypos; 302 unsigned int w, h, bw, depth; 303 stat = XGetGeometry(dpy, d, &root, &xpos, &ypos, &w, &h, &bw, &depth); 304 *width = w; 305 *height = h; 306 return stat; 307} 308#endif 309 310 311/** 312 * Return the size of the window (or pixmap) that corresponds to the 313 * given XMesaBuffer. 314 * \param width returns width in pixels 315 * \param height returns height in pixels 316 */ 317void 318xmesa_get_window_size(XMesaDisplay *dpy, XMesaBuffer b, 319 GLuint *width, GLuint *height) 320{ 321#ifdef XFree86Server 322 *width = MIN2(b->frontxrb->drawable->width, MAX_WIDTH); 323 *height = MIN2(b->frontxrb->drawable->height, MAX_HEIGHT); 324#else 325 Status stat; 326 327 _glthread_LOCK_MUTEX(_xmesa_lock); 328 XSync(b->xm_visual->display, 0); /* added for Chromium */ 329 stat = get_drawable_size(dpy, b->frontxrb->pixmap, width, height); 330 _glthread_UNLOCK_MUTEX(_xmesa_lock); 331 332 if (!stat) { 333 /* probably querying a window that's recently been destroyed */ 334 _mesa_warning(NULL, "XGetGeometry failed!\n"); 335 *width = *height = 1; 336 } 337#endif 338} 339 340 341 342/**********************************************************************/ 343/***** Linked list of XMesaBuffers *****/ 344/**********************************************************************/ 345 346XMesaBuffer XMesaBufferList = NULL; 347 348 349/** 350 * Allocate a new XMesaBuffer object which corresponds to the given drawable. 351 * Note that XMesaBuffer is derived from GLframebuffer. 352 * The new XMesaBuffer will not have any size (Width=Height=0). 353 * 354 * \param d the corresponding X drawable (window or pixmap) 355 * \param type either WINDOW, PIXMAP or PBUFFER, describing d 356 * \param vis the buffer's visual 357 * \param cmap the window's colormap, if known. 358 * \return new XMesaBuffer or NULL if any problem 359 */ 360static XMesaBuffer 361create_xmesa_buffer(XMesaDrawable d, BufferType type, 362 XMesaVisual vis, XMesaColormap cmap) 363{ 364 XMesaBuffer b; 365 366 ASSERT(type == WINDOW || type == PIXMAP || type == PBUFFER); 367 368 b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer); 369 if (!b) 370 return NULL; 371 372 b->display = vis->display; 373 b->xm_visual = vis; 374 b->type = type; 375 b->cmap = cmap; 376 377 _mesa_initialize_framebuffer(&b->mesa_buffer, &vis->mesa_visual); 378 b->mesa_buffer.Delete = xmesa_delete_framebuffer; 379 380 /* 381 * Front renderbuffer 382 */ 383 b->frontxrb = xmesa_new_renderbuffer(NULL, 0, &vis->mesa_visual, GL_FALSE); 384 if (!b->frontxrb) { 385 _mesa_free(b); 386 return NULL; 387 } 388 b->frontxrb->Parent = b; 389 b->frontxrb->drawable = d; 390 b->frontxrb->pixmap = (XMesaPixmap) d; 391 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_FRONT_LEFT, 392 &b->frontxrb->Base); 393 394 /* 395 * Back renderbuffer 396 */ 397 if (vis->mesa_visual.doubleBufferMode) { 398 b->backxrb = xmesa_new_renderbuffer(NULL, 0, &vis->mesa_visual, GL_TRUE); 399 if (!b->backxrb) { 400 /* XXX free front xrb too */ 401 _mesa_free(b); 402 return NULL; 403 } 404 b->backxrb->Parent = b; 405 /* determine back buffer implementation */ 406 b->db_mode = vis->ximage_flag ? BACK_XIMAGE : BACK_PIXMAP; 407 408 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_BACK_LEFT, 409 &b->backxrb->Base); 410 } 411 412 /* 413 * Software alpha planes 414 */ 415 if (vis->mesa_visual.alphaBits > 0 416 && vis->undithered_pf != PF_8A8B8G8R 417 && vis->undithered_pf != PF_8A8R8G8B) { 418 /* Visual has alpha, but pixel format doesn't support it. 419 * We'll use an alpha renderbuffer wrapper. 420 */ 421 b->swAlpha = GL_TRUE; 422 } 423 else { 424 b->swAlpha = GL_FALSE; 425 } 426 427 /* 428 * Other renderbuffer (depth, stencil, etc) 429 */ 430 _mesa_add_soft_renderbuffers(&b->mesa_buffer, 431 GL_FALSE, /* color */ 432 vis->mesa_visual.haveDepthBuffer, 433 vis->mesa_visual.haveStencilBuffer, 434 vis->mesa_visual.haveAccumBuffer, 435 b->swAlpha, 436 vis->mesa_visual.numAuxBuffers > 0 ); 437 438 /* GLX_EXT_texture_from_pixmap */ 439 b->TextureTarget = 0; 440 b->TextureFormat = GLX_TEXTURE_FORMAT_NONE_EXT; 441 b->TextureMipmap = 0; 442 443 /* insert buffer into linked list */ 444 b->Next = XMesaBufferList; 445 XMesaBufferList = b; 446 447 return b; 448} 449 450 451/** 452 * Find an XMesaBuffer by matching X display and colormap but NOT matching 453 * the notThis buffer. 454 */ 455XMesaBuffer 456xmesa_find_buffer(XMesaDisplay *dpy, XMesaColormap cmap, XMesaBuffer notThis) 457{ 458 XMesaBuffer b; 459 for (b=XMesaBufferList; b; b=b->Next) { 460 if (b->display==dpy && b->cmap==cmap && b!=notThis) { 461 return b; 462 } 463 } 464 return NULL; 465} 466 467 468/** 469 * Remove buffer from linked list, delete if no longer referenced. 470 */ 471static void 472xmesa_free_buffer(XMesaBuffer buffer) 473{ 474 XMesaBuffer prev = NULL, b; 475 476 for (b = XMesaBufferList; b; b = b->Next) { 477 if (b == buffer) { 478 struct gl_framebuffer *fb = &buffer->mesa_buffer; 479 480 /* unlink buffer from list */ 481 if (prev) 482 prev->Next = buffer->Next; 483 else 484 XMesaBufferList = buffer->Next; 485 486 /* mark as delete pending */ 487 fb->DeletePending = GL_TRUE; 488 489 /* Since the X window for the XMesaBuffer is going away, we don't 490 * want to dereference this pointer in the future. 491 */ 492 b->frontxrb->drawable = 0; 493 494 /* Unreference. If count = zero we'll really delete the buffer */ 495 _mesa_reference_framebuffer(&fb, NULL); 496 497 return; 498 } 499 /* continue search */ 500 prev = b; 501 } 502 /* buffer not found in XMesaBufferList */ 503 _mesa_problem(NULL,"xmesa_free_buffer() - buffer not found\n"); 504} 505 506 507/** 508 * Copy X color table stuff from one XMesaBuffer to another. 509 */ 510static void 511copy_colortable_info(XMesaBuffer dst, const XMesaBuffer src) 512{ 513 MEMCPY(dst->color_table, src->color_table, sizeof(src->color_table)); 514 MEMCPY(dst->pixel_to_r, src->pixel_to_r, sizeof(src->pixel_to_r)); 515 MEMCPY(dst->pixel_to_g, src->pixel_to_g, sizeof(src->pixel_to_g)); 516 MEMCPY(dst->pixel_to_b, src->pixel_to_b, sizeof(src->pixel_to_b)); 517 dst->num_alloced = src->num_alloced; 518 MEMCPY(dst->alloced_colors, src->alloced_colors, 519 sizeof(src->alloced_colors)); 520} 521 522 523 524/**********************************************************************/ 525/***** Misc Private Functions *****/ 526/**********************************************************************/ 527 528 529/** 530 * A replacement for XAllocColor. This function should never 531 * fail to allocate a color. When XAllocColor fails, we return 532 * the nearest matching color. If we have to allocate many colors 533 * this function isn't too efficient; the XQueryColors() could be 534 * done just once. 535 * Written by Michael Pichler, Brian Paul, Mark Kilgard 536 * Input: dpy - X display 537 * cmap - X colormap 538 * cmapSize - size of colormap 539 * In/Out: color - the XColor struct 540 * Output: exact - 1=exact color match, 0=closest match 541 * alloced - 1=XAlloc worked, 0=XAlloc failed 542 */ 543static void 544noFaultXAllocColor( int client, 545 XMesaDisplay *dpy, 546 XMesaColormap cmap, 547 int cmapSize, 548 XMesaColor *color, 549 int *exact, int *alloced ) 550{ 551#ifdef XFree86Server 552 Pixel *ppixIn; 553 xrgb *ctable; 554#else 555 /* we'll try to cache ctable for better remote display performance */ 556 static Display *prevDisplay = NULL; 557 static XMesaColormap prevCmap = 0; 558 static int prevCmapSize = 0; 559 static XMesaColor *ctable = NULL; 560#endif 561 XMesaColor subColor; 562 int i, bestmatch; 563 double mindist; /* 3*2^16^2 exceeds long int precision. */ 564 565 (void) client; 566 567 /* First try just using XAllocColor. */ 568#ifdef XFree86Server 569 if (AllocColor(cmap, 570 &color->red, &color->green, &color->blue, 571 &color->pixel, 572 client) == Success) 573#else 574 if (XAllocColor(dpy, cmap, color)) 575#endif 576 { 577 *exact = 1; 578 *alloced = 1; 579 return; 580 } 581 582 /* Alloc failed, search for closest match */ 583 584 /* Retrieve color table entries. */ 585 /* XXX alloca candidate. */ 586#ifdef XFree86Server 587 ppixIn = (Pixel *) MALLOC(cmapSize * sizeof(Pixel)); 588 ctable = (xrgb *) MALLOC(cmapSize * sizeof(xrgb)); 589 for (i = 0; i < cmapSize; i++) { 590 ppixIn[i] = i; 591 } 592 QueryColors(cmap, cmapSize, ppixIn, ctable); 593#else 594 if (prevDisplay != dpy || prevCmap != cmap 595 || prevCmapSize != cmapSize || !ctable) { 596 /* free previously cached color table */ 597 if (ctable) 598 _mesa_free(ctable); 599 /* Get the color table from X */ 600 ctable = (XMesaColor *) MALLOC(cmapSize * sizeof(XMesaColor)); 601 assert(ctable); 602 for (i = 0; i < cmapSize; i++) { 603 ctable[i].pixel = i; 604 } 605 XQueryColors(dpy, cmap, ctable, cmapSize); 606 prevDisplay = dpy; 607 prevCmap = cmap; 608 prevCmapSize = cmapSize; 609 } 610#endif 611 612 /* Find best match. */ 613 bestmatch = -1; 614 mindist = 0.0; 615 for (i = 0; i < cmapSize; i++) { 616 double dr = 0.30 * ((double) color->red - (double) ctable[i].red); 617 double dg = 0.59 * ((double) color->green - (double) ctable[i].green); 618 double db = 0.11 * ((double) color->blue - (double) ctable[i].blue); 619 double dist = dr * dr + dg * dg + db * db; 620 if (bestmatch < 0 || dist < mindist) { 621 bestmatch = i; 622 mindist = dist; 623 } 624 } 625 626 /* Return result. */ 627 subColor.red = ctable[bestmatch].red; 628 subColor.green = ctable[bestmatch].green; 629 subColor.blue = ctable[bestmatch].blue; 630 /* Try to allocate the closest match color. This should only 631 * fail if the cell is read/write. Otherwise, we're incrementing 632 * the cell's reference count. 633 */ 634#ifdef XFree86Server 635 if (AllocColor(cmap, 636 &subColor.red, &subColor.green, &subColor.blue, 637 &subColor.pixel, 638 client) == Success) { 639#else 640 if (XAllocColor(dpy, cmap, &subColor)) { 641#endif 642 *alloced = 1; 643 } 644 else { 645 /* do this to work around a problem reported by Frank Ortega */ 646 subColor.pixel = (unsigned long) bestmatch; 647 subColor.red = ctable[bestmatch].red; 648 subColor.green = ctable[bestmatch].green; 649 subColor.blue = ctable[bestmatch].blue; 650 subColor.flags = DoRed | DoGreen | DoBlue; 651 *alloced = 0; 652 } 653#ifdef XFree86Server 654 _mesa_free(ppixIn); 655 _mesa_free(ctable); 656#else 657 /* don't free table, save it for next time */ 658#endif 659 660 *color = subColor; 661 *exact = 0; 662} 663 664 665 666/** 667 * Do setup for PF_GRAYSCALE pixel format. 668 * Note that buffer may be NULL. 669 */ 670static GLboolean 671setup_grayscale(int client, XMesaVisual v, 672 XMesaBuffer buffer, XMesaColormap cmap) 673{ 674 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 675 return GL_FALSE; 676 } 677 678 if (buffer) { 679 XMesaBuffer prevBuffer; 680 681 if (!cmap) { 682 return GL_FALSE; 683 } 684 685 prevBuffer = xmesa_find_buffer(v->display, cmap, buffer); 686 if (prevBuffer && 687 (buffer->xm_visual->mesa_visual.rgbMode == 688 prevBuffer->xm_visual->mesa_visual.rgbMode)) { 689 /* Copy colormap stuff from previous XMesaBuffer which uses same 690 * X colormap. Do this to avoid time spent in noFaultXAllocColor. 691 */ 692 copy_colortable_info(buffer, prevBuffer); 693 } 694 else { 695 /* Allocate 256 shades of gray */ 696 int gray; 697 int colorsfailed = 0; 698 for (gray=0;gray<256;gray++) { 699 GLint r = gamma_adjust( v->RedGamma, gray, 255 ); 700 GLint g = gamma_adjust( v->GreenGamma, gray, 255 ); 701 GLint b = gamma_adjust( v->BlueGamma, gray, 255 ); 702 int exact, alloced; 703 XMesaColor xcol; 704 xcol.red = (r << 8) | r; 705 xcol.green = (g << 8) | g; 706 xcol.blue = (b << 8) | b; 707 noFaultXAllocColor( client, v->display, 708 cmap, GET_COLORMAP_SIZE(v), 709 &xcol, &exact, &alloced ); 710 if (!exact) { 711 colorsfailed++; 712 } 713 if (alloced) { 714 assert(buffer->num_alloced<256); 715 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 716 buffer->num_alloced++; 717 } 718 719 /*OLD 720 assert(gray < 576); 721 buffer->color_table[gray*3+0] = xcol.pixel; 722 buffer->color_table[gray*3+1] = xcol.pixel; 723 buffer->color_table[gray*3+2] = xcol.pixel; 724 assert(xcol.pixel < 65536); 725 buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100; 726 buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100; 727 buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100; 728 */ 729 buffer->color_table[gray] = xcol.pixel; 730 assert(xcol.pixel < 65536); 731 buffer->pixel_to_r[xcol.pixel] = gray; 732 buffer->pixel_to_g[xcol.pixel] = gray; 733 buffer->pixel_to_b[xcol.pixel] = gray; 734 } 735 736 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { 737 _mesa_warning(NULL, 738 "Note: %d out of 256 needed colors do not match exactly.\n", 739 colorsfailed ); 740 } 741 } 742 } 743 744 v->dithered_pf = PF_Grayscale; 745 v->undithered_pf = PF_Grayscale; 746 return GL_TRUE; 747} 748 749 750 751/** 752 * Setup RGB rendering for a window with a PseudoColor, StaticColor, 753 * or 8-bit TrueColor visual visual. We try to allocate a palette of 225 754 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB 755 * color. While this function was originally designed just for 8-bit 756 * visuals, it has also proven to work from 4-bit up to 16-bit visuals. 757 * Dithering code contributed by Bob Mercier. 758 */ 759static GLboolean 760setup_dithered_color(int client, XMesaVisual v, 761 XMesaBuffer buffer, XMesaColormap cmap) 762{ 763 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 764 return GL_FALSE; 765 } 766 767 if (buffer) { 768 XMesaBuffer prevBuffer; 769 770 if (!cmap) { 771 return GL_FALSE; 772 } 773 774 prevBuffer = xmesa_find_buffer(v->display, cmap, buffer); 775 if (prevBuffer && 776 (buffer->xm_visual->mesa_visual.rgbMode == 777 prevBuffer->xm_visual->mesa_visual.rgbMode)) { 778 /* Copy colormap stuff from previous, matching XMesaBuffer. 779 * Do this to avoid time spent in noFaultXAllocColor. 780 */ 781 copy_colortable_info(buffer, prevBuffer); 782 } 783 else { 784 /* Allocate X colors and initialize color_table[], red_table[], etc */ 785 int r, g, b, i; 786 int colorsfailed = 0; 787 for (r = 0; r < DITH_R; r++) { 788 for (g = 0; g < DITH_G; g++) { 789 for (b = 0; b < DITH_B; b++) { 790 XMesaColor xcol; 791 int exact, alloced; 792 xcol.red =gamma_adjust(v->RedGamma, r*65535/(DITH_R-1),65535); 793 xcol.green=gamma_adjust(v->GreenGamma, g*65535/(DITH_G-1),65535); 794 xcol.blue =gamma_adjust(v->BlueGamma, b*65535/(DITH_B-1),65535); 795 noFaultXAllocColor( client, v->display, 796 cmap, GET_COLORMAP_SIZE(v), 797 &xcol, &exact, &alloced ); 798 if (!exact) { 799 colorsfailed++; 800 } 801 if (alloced) { 802 assert(buffer->num_alloced<256); 803 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 804 buffer->num_alloced++; 805 } 806 i = DITH_MIX( r, g, b ); 807 assert(i < 576); 808 buffer->color_table[i] = xcol.pixel; 809 assert(xcol.pixel < 65536); 810 buffer->pixel_to_r[xcol.pixel] = r * 255 / (DITH_R-1); 811 buffer->pixel_to_g[xcol.pixel] = g * 255 / (DITH_G-1); 812 buffer->pixel_to_b[xcol.pixel] = b * 255 / (DITH_B-1); 813 } 814 } 815 } 816 817 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { 818 _mesa_warning(NULL, 819 "Note: %d out of %d needed colors do not match exactly.\n", 820 colorsfailed, DITH_R * DITH_G * DITH_B ); 821 } 822 } 823 } 824 825 v->dithered_pf = PF_Dither; 826 v->undithered_pf = PF_Lookup; 827 return GL_TRUE; 828} 829 830 831/** 832 * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode. 833 * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer. 834 * Special dithering tables have to be initialized. 835 */ 836static void 837setup_8bit_hpcr(XMesaVisual v) 838{ 839 /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be) 840 * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined 841 * on the root window AND the colormap obtainable by XGetRGBColormaps 842 * for that atom must be set on the window. (see also tkInitWindow) 843 * If that colormap is not set, the output will look stripy. 844 */ 845 846 /* Setup color tables with gamma correction */ 847 int i; 848 double g; 849 850 g = 1.0 / v->RedGamma; 851 for (i=0; i<256; i++) { 852 GLint red = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[0][i]/255.0, g )); 853 v->hpcr_rgbTbl[0][i] = CLAMP( red, 16, 239 ); 854 } 855 856 g = 1.0 / v->GreenGamma; 857 for (i=0; i<256; i++) { 858 GLint green = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[1][i]/255.0, g )); 859 v->hpcr_rgbTbl[1][i] = CLAMP( green, 16, 239 ); 860 } 861 862 g = 1.0 / v->BlueGamma; 863 for (i=0; i<256; i++) { 864 GLint blue = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[2][i]/255.0, g )); 865 v->hpcr_rgbTbl[2][i] = CLAMP( blue, 32, 223 ); 866 } 867 v->undithered_pf = PF_HPCR; /* can't really disable dithering for now */ 868 v->dithered_pf = PF_HPCR; 869 870 /* which method should I use to clear */ 871 /* GL_FALSE: keep the ordinary method */ 872 /* GL_TRUE : clear with dither pattern */ 873 v->hpcr_clear_flag = _mesa_getenv("MESA_HPCR_CLEAR") ? GL_TRUE : GL_FALSE; 874 875 if (v->hpcr_clear_flag) { 876 v->hpcr_clear_pixmap = XMesaCreatePixmap(v->display, 877 DefaultRootWindow(v->display), 878 16, 2, 8); 879#ifndef XFree86Server 880 v->hpcr_clear_ximage = XGetImage(v->display, v->hpcr_clear_pixmap, 881 0, 0, 16, 2, AllPlanes, ZPixmap); 882#endif 883 } 884} 885 886 887/** 888 * Setup RGB rendering for a window with a True/DirectColor visual. 889 */ 890static void 891setup_truecolor(XMesaVisual v, XMesaBuffer buffer, XMesaColormap cmap) 892{ 893 unsigned long rmask, gmask, bmask; 894 (void) buffer; 895 (void) cmap; 896 897 /* Compute red multiplier (mask) and bit shift */ 898 v->rshift = 0; 899 rmask = GET_REDMASK(v); 900 while ((rmask & 1)==0) { 901 v->rshift++; 902 rmask = rmask >> 1; 903 } 904 905 /* Compute green multiplier (mask) and bit shift */ 906 v->gshift = 0; 907 gmask = GET_GREENMASK(v); 908 while ((gmask & 1)==0) { 909 v->gshift++; 910 gmask = gmask >> 1; 911 } 912 913 /* Compute blue multiplier (mask) and bit shift */ 914 v->bshift = 0; 915 bmask = GET_BLUEMASK(v); 916 while ((bmask & 1)==0) { 917 v->bshift++; 918 bmask = bmask >> 1; 919 } 920 921 /* 922 * Compute component-to-pixel lookup tables and dithering kernel 923 */ 924 { 925 static GLubyte kernel[16] = { 926 0*16, 8*16, 2*16, 10*16, 927 12*16, 4*16, 14*16, 6*16, 928 3*16, 11*16, 1*16, 9*16, 929 15*16, 7*16, 13*16, 5*16, 930 }; 931 GLint rBits = _mesa_bitcount(rmask); 932 GLint gBits = _mesa_bitcount(gmask); 933 GLint bBits = _mesa_bitcount(bmask); 934 GLint maxBits; 935 GLuint i; 936 937 /* convert pixel components in [0,_mask] to RGB values in [0,255] */ 938 for (i=0; i<=rmask; i++) 939 v->PixelToR[i] = (unsigned char) ((i * 255) / rmask); 940 for (i=0; i<=gmask; i++) 941 v->PixelToG[i] = (unsigned char) ((i * 255) / gmask); 942 for (i=0; i<=bmask; i++) 943 v->PixelToB[i] = (unsigned char) ((i * 255) / bmask); 944 945 /* convert RGB values from [0,255] to pixel components */ 946 947 for (i=0;i<256;i++) { 948 GLint r = gamma_adjust(v->RedGamma, i, 255); 949 GLint g = gamma_adjust(v->GreenGamma, i, 255); 950 GLint b = gamma_adjust(v->BlueGamma, i, 255); 951 v->RtoPixel[i] = (r >> (8-rBits)) << v->rshift; 952 v->GtoPixel[i] = (g >> (8-gBits)) << v->gshift; 953 v->BtoPixel[i] = (b >> (8-bBits)) << v->bshift; 954 } 955 /* overflow protection */ 956 for (i=256;i<512;i++) { 957 v->RtoPixel[i] = v->RtoPixel[255]; 958 v->GtoPixel[i] = v->GtoPixel[255]; 959 v->BtoPixel[i] = v->BtoPixel[255]; 960 } 961 962 /* setup dithering kernel */ 963 maxBits = rBits; 964 if (gBits > maxBits) maxBits = gBits; 965 if (bBits > maxBits) maxBits = bBits; 966 for (i=0;i<16;i++) { 967 v->Kernel[i] = kernel[i] >> maxBits; 968 } 969 970 v->undithered_pf = PF_Truecolor; 971 v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_Dither_True : PF_Truecolor; 972 } 973 974 /* 975 * Now check for TrueColor visuals which we can optimize. 976 */ 977 if ( GET_REDMASK(v) ==0x0000ff 978 && GET_GREENMASK(v)==0x00ff00 979 && GET_BLUEMASK(v) ==0xff0000 980 && CHECK_BYTE_ORDER(v) 981 && v->BitsPerPixel==32 982 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 983 /* common 32 bpp config used on SGI, Sun */ 984 v->undithered_pf = v->dithered_pf = PF_8A8B8G8R; /* ABGR */ 985 } 986 else if (GET_REDMASK(v) == 0xff0000 987 && GET_GREENMASK(v)== 0x00ff00 988 && GET_BLUEMASK(v) == 0x0000ff 989 && CHECK_BYTE_ORDER(v) 990 && v->RedGamma == 1.0 && v->GreenGamma == 1.0 && v->BlueGamma == 1.0){ 991 if (v->BitsPerPixel==32) { 992 /* if 32 bpp, and visual indicates 8 bpp alpha channel */ 993 if (GET_VISUAL_DEPTH(v) == 32 && v->mesa_visual.alphaBits == 8) 994 v->undithered_pf = v->dithered_pf = PF_8A8R8G8B; /* ARGB */ 995 else 996 v->undithered_pf = v->dithered_pf = PF_8R8G8B; /* xRGB */ 997 } 998 else if (v->BitsPerPixel == 24) { 999 v->undithered_pf = v->dithered_pf = PF_8R8G8B24; /* RGB */ 1000 } 1001 } 1002 else if (GET_REDMASK(v) ==0xf800 1003 && GET_GREENMASK(v)==0x07e0 1004 && GET_BLUEMASK(v) ==0x001f 1005 && CHECK_BYTE_ORDER(v) 1006 && v->BitsPerPixel==16 1007 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1008 /* 5-6-5 RGB */ 1009 v->undithered_pf = PF_5R6G5B; 1010 v->dithered_pf = PF_Dither_5R6G5B; 1011 } 1012 else if (GET_REDMASK(v) ==0xe0 1013 && GET_GREENMASK(v)==0x1c 1014 && GET_BLUEMASK(v) ==0x03 1015 && CHECK_FOR_HPCR(v)) { 1016 /* 8-bit HP color recovery */ 1017 setup_8bit_hpcr( v ); 1018 } 1019} 1020 1021 1022 1023/** 1024 * Setup RGB rendering for a window with a monochrome visual. 1025 */ 1026static void 1027setup_monochrome( XMesaVisual v, XMesaBuffer b ) 1028{ 1029 (void) b; 1030 v->dithered_pf = v->undithered_pf = PF_1Bit; 1031 /* if black=1 then we must flip pixel values */ 1032 v->bitFlip = (GET_BLACK_PIXEL(v) != 0); 1033} 1034 1035 1036 1037/** 1038 * When a context is bound for the first time, we can finally finish 1039 * initializing the context's visual and buffer information. 1040 * \param v the XMesaVisual to initialize 1041 * \param b the XMesaBuffer to initialize (may be NULL) 1042 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode 1043 * \param window the window/pixmap we're rendering into 1044 * \param cmap the colormap associated with the window/pixmap 1045 * \return GL_TRUE=success, GL_FALSE=failure 1046 */ 1047static GLboolean 1048initialize_visual_and_buffer(XMesaVisual v, XMesaBuffer b, 1049 GLboolean rgb_flag, XMesaDrawable window, 1050 XMesaColormap cmap) 1051{ 1052 int client = 0; 1053 1054#ifdef XFree86Server 1055 client = (window) ? CLIENT_ID(window->id) : 0; 1056#endif 1057 1058 ASSERT(!b || b->xm_visual == v); 1059 1060 /* Save true bits/pixel */ 1061 v->BitsPerPixel = bits_per_pixel(v); 1062 assert(v->BitsPerPixel > 0); 1063 1064 if (rgb_flag == GL_FALSE) { 1065 /* COLOR-INDEXED WINDOW: 1066 * Even if the visual is TrueColor or DirectColor we treat it as 1067 * being color indexed. This is weird but might be useful to someone. 1068 */ 1069 v->dithered_pf = v->undithered_pf = PF_Index; 1070 v->mesa_visual.indexBits = GET_VISUAL_DEPTH(v); 1071 } 1072 else { 1073 /* RGB WINDOW: 1074 * We support RGB rendering into almost any kind of visual. 1075 */ 1076 const int xclass = v->mesa_visual.visualType; 1077 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { 1078 setup_truecolor( v, b, cmap ); 1079 } 1080 else if (xclass == GLX_STATIC_GRAY && GET_VISUAL_DEPTH(v) == 1) { 1081 setup_monochrome( v, b ); 1082 } 1083 else if (xclass == GLX_GRAY_SCALE || xclass == GLX_STATIC_GRAY) { 1084 if (!setup_grayscale( client, v, b, cmap )) { 1085 return GL_FALSE; 1086 } 1087 } 1088 else if ((xclass == GLX_PSEUDO_COLOR || xclass == GLX_STATIC_COLOR) 1089 && GET_VISUAL_DEPTH(v)>=4 && GET_VISUAL_DEPTH(v)<=16) { 1090 if (!setup_dithered_color( client, v, b, cmap )) { 1091 return GL_FALSE; 1092 } 1093 } 1094 else { 1095 _mesa_warning(NULL, "XMesa: RGB mode rendering not supported in given visual.\n"); 1096 return GL_FALSE; 1097 } 1098 v->mesa_visual.indexBits = 0; 1099 1100 if (_mesa_getenv("MESA_NO_DITHER")) { 1101 v->dithered_pf = v->undithered_pf; 1102 } 1103 } 1104 1105 1106 /* 1107 * If MESA_INFO env var is set print out some debugging info 1108 * which can help Brian figure out what's going on when a user 1109 * reports bugs. 1110 */ 1111 if (_mesa_getenv("MESA_INFO")) { 1112 _mesa_printf("X/Mesa visual = %p\n", (void *) v); 1113 _mesa_printf("X/Mesa dithered pf = %u\n", v->dithered_pf); 1114 _mesa_printf("X/Mesa undithered pf = %u\n", v->undithered_pf); 1115 _mesa_printf("X/Mesa level = %d\n", v->mesa_visual.level); 1116 _mesa_printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v)); 1117 _mesa_printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel); 1118 } 1119 1120 if (b && window) { 1121 char *data; 1122 1123 /* Do window-specific initializations */ 1124 1125 /* these should have been set in create_xmesa_buffer */ 1126 ASSERT(b->frontxrb->drawable == window); 1127 ASSERT(b->frontxrb->pixmap == (XMesaPixmap) window); 1128 1129 /* Setup for single/double buffering */ 1130 if (v->mesa_visual.doubleBufferMode) { 1131 /* Double buffered */ 1132 b->shm = check_for_xshm( v->display ); 1133 } 1134 1135 /* X11 graphics contexts */ 1136#ifdef XFree86Server 1137 b->gc = CreateScratchGC(v->display, window->depth); 1138#else 1139 b->gc = XCreateGC( v->display, window, 0, NULL ); 1140#endif 1141 XMesaSetFunction( v->display, b->gc, GXcopy ); 1142 1143 /* cleargc - for glClear() */ 1144#ifdef XFree86Server 1145 b->cleargc = CreateScratchGC(v->display, window->depth); 1146#else 1147 b->cleargc = XCreateGC( v->display, window, 0, NULL ); 1148#endif 1149 XMesaSetFunction( v->display, b->cleargc, GXcopy ); 1150 1151 /* 1152 * Don't generate Graphics Expose/NoExpose events in swapbuffers(). 1153 * Patch contributed by Michael Pichler May 15, 1995. 1154 */ 1155#ifdef XFree86Server 1156 b->swapgc = CreateScratchGC(v->display, window->depth); 1157 { 1158 CARD32 v[1]; 1159 v[0] = FALSE; 1160 dixChangeGC(NullClient, b->swapgc, GCGraphicsExposures, v, NULL); 1161 } 1162#else 1163 { 1164 XGCValues gcvalues; 1165 gcvalues.graphics_exposures = False; 1166 b->swapgc = XCreateGC(v->display, window, 1167 GCGraphicsExposures, &gcvalues); 1168 } 1169#endif 1170 XMesaSetFunction( v->display, b->swapgc, GXcopy ); 1171 /* 1172 * Set fill style and tile pixmap once for all for HPCR stuff 1173 * (instead of doing it each time in clear_color_HPCR_pixmap()) 1174 * Initialize whole stuff 1175 * Patch contributed by Jacques Leroy March 8, 1998. 1176 */ 1177 if (v->hpcr_clear_flag && b->backxrb && b->backxrb->pixmap) { 1178 int i; 1179 for (i = 0; i < 16; i++) { 1180 XMesaPutPixel(v->hpcr_clear_ximage, i, 0, 0); 1181 XMesaPutPixel(v->hpcr_clear_ximage, i, 1, 0); 1182 } 1183 XMesaPutImage(b->display, (XMesaDrawable) v->hpcr_clear_pixmap, 1184 b->cleargc, v->hpcr_clear_ximage, 0, 0, 0, 0, 16, 2); 1185 XMesaSetFillStyle( v->display, b->cleargc, FillTiled); 1186 XMesaSetTile( v->display, b->cleargc, v->hpcr_clear_pixmap ); 1187 } 1188 1189 /* Initialize the row buffer XImage for use in write_color_span() */ 1190 data = (char*) MALLOC(MAX_WIDTH*4); 1191#ifdef XFree86Server 1192 b->rowimage = XMesaCreateImage(GET_VISUAL_DEPTH(v), MAX_WIDTH, 1, data); 1193#else 1194 b->rowimage = XCreateImage( v->display, 1195 v->visinfo->visual, 1196 v->visinfo->depth, 1197 ZPixmap, 0, /*format, offset*/ 1198 data, /*data*/ 1199 MAX_WIDTH, 1, /*width, height*/ 1200 32, /*bitmap_pad*/ 1201 0 /*bytes_per_line*/ ); 1202#endif 1203 if (!b->rowimage) 1204 return GL_FALSE; 1205 } 1206 1207 return GL_TRUE; 1208} 1209 1210 1211 1212/* 1213 * Convert an RGBA color to a pixel value. 1214 */ 1215unsigned long 1216xmesa_color_to_pixel(GLcontext *ctx, 1217 GLubyte r, GLubyte g, GLubyte b, GLubyte a, 1218 GLuint pixelFormat) 1219{ 1220 XMesaContext xmesa = XMESA_CONTEXT(ctx); 1221 switch (pixelFormat) { 1222 case PF_Index: 1223 return 0; 1224 case PF_Truecolor: 1225 { 1226 unsigned long p; 1227 PACK_TRUECOLOR( p, r, g, b ); 1228 return p; 1229 } 1230 case PF_8A8B8G8R: 1231 return PACK_8A8B8G8R( r, g, b, a ); 1232 case PF_8A8R8G8B: 1233 return PACK_8A8R8G8B( r, g, b, a ); 1234 case PF_8R8G8B: 1235 /* fall through */ 1236 case PF_8R8G8B24: 1237 return PACK_8R8G8B( r, g, b ); 1238 case PF_5R6G5B: 1239 return PACK_5R6G5B( r, g, b ); 1240 case PF_Dither: 1241 { 1242 DITHER_SETUP; 1243 return DITHER( 1, 0, r, g, b ); 1244 } 1245 case PF_1Bit: 1246 /* 382 = (3*255)/2 */ 1247 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 1248 case PF_HPCR: 1249 return DITHER_HPCR(1, 1, r, g, b); 1250 case PF_Lookup: 1251 { 1252 LOOKUP_SETUP; 1253 return LOOKUP( r, g, b ); 1254 } 1255 case PF_Grayscale: 1256 return GRAY_RGB( r, g, b ); 1257 case PF_Dither_True: 1258 /* fall through */ 1259 case PF_Dither_5R6G5B: 1260 { 1261 unsigned long p; 1262 PACK_TRUEDITHER(p, 1, 0, r, g, b); 1263 return p; 1264 } 1265 default: 1266 _mesa_problem(ctx, "Bad pixel format in xmesa_color_to_pixel"); 1267 } 1268 return 0; 1269} 1270 1271 1272#define NUM_VISUAL_TYPES 6 1273 1274/** 1275 * Convert an X visual type to a GLX visual type. 1276 * 1277 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.) 1278 * to be converted. 1279 * \return If \c visualType is a valid X visual type, a GLX visual type will 1280 * be returned. Otherwise \c GLX_NONE will be returned. 1281 * 1282 * \note 1283 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the 1284 * DRI CVS tree. 1285 */ 1286static GLint 1287xmesa_convert_from_x_visual_type( int visualType ) 1288{ 1289 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = { 1290 GLX_STATIC_GRAY, GLX_GRAY_SCALE, 1291 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR, 1292 GLX_TRUE_COLOR, GLX_DIRECT_COLOR 1293 }; 1294 1295 return ( (unsigned) visualType < NUM_VISUAL_TYPES ) 1296 ? glx_visual_types[ visualType ] : GLX_NONE; 1297} 1298 1299 1300/**********************************************************************/ 1301/***** Public Functions *****/ 1302/**********************************************************************/ 1303 1304 1305#ifdef IN_DRI_DRIVER 1306#define need_GL_VERSION_1_3 1307#define need_GL_VERSION_1_4 1308#define need_GL_VERSION_1_5 1309#define need_GL_VERSION_2_0 1310 1311/* sw extensions for imaging */ 1312#define need_GL_EXT_blend_color 1313#define need_GL_EXT_blend_minmax 1314#define need_GL_EXT_convolution 1315#define need_GL_EXT_histogram 1316#define need_GL_SGI_color_table 1317 1318/* sw extensions not associated with some GL version */ 1319#define need_GL_ARB_shader_objects 1320#define need_GL_ARB_vertex_program 1321#define need_GL_APPLE_vertex_array_object 1322#define need_GL_ATI_fragment_shader 1323#define need_GL_EXT_depth_bounds_test 1324#define need_GL_EXT_framebuffer_object 1325#define need_GL_EXT_framebuffer_blit 1326#define need_GL_EXT_gpu_program_parameters 1327#define need_GL_EXT_paletted_texture 1328#define need_GL_MESA_resize_buffers 1329#define need_GL_NV_vertex_program 1330#define need_GL_NV_fragment_program 1331 1332#include "extension_helper.h" 1333#include "utils.h" 1334 1335const struct dri_extension card_extensions[] = 1336{ 1337 { "GL_VERSION_1_3", GL_VERSION_1_3_functions }, 1338 { "GL_VERSION_1_4", GL_VERSION_1_4_functions }, 1339 { "GL_VERSION_1_5", GL_VERSION_1_5_functions }, 1340 { "GL_VERSION_2_0", GL_VERSION_2_0_functions }, 1341 1342 { "GL_EXT_blend_color", GL_EXT_blend_color_functions }, 1343 { "GL_EXT_blend_minmax", GL_EXT_blend_minmax_functions }, 1344 { "GL_EXT_convolution", GL_EXT_convolution_functions }, 1345 { "GL_EXT_histogram", GL_EXT_histogram_functions }, 1346 { "GL_SGI_color_table", GL_SGI_color_table_functions }, 1347 1348 { "GL_ARB_shader_objects", GL_ARB_shader_objects_functions }, 1349 { "GL_ARB_vertex_program", GL_ARB_vertex_program_functions }, 1350 { "GL_APPLE_vertex_array_object", GL_APPLE_vertex_array_object_functions }, 1351 { "GL_ATI_fragment_shader", GL_ATI_fragment_shader_functions }, 1352 { "GL_EXT_depth_bounds_test", GL_EXT_depth_bounds_test_functions }, 1353 { "GL_EXT_framebuffer_object", GL_EXT_framebuffer_object_functions }, 1354 { "GL_EXT_framebuffer_blit", GL_EXT_framebuffer_blit_functions }, 1355 { "GL_EXT_gpu_program_parameters", GL_EXT_gpu_program_parameters_functions }, 1356 { "GL_EXT_paletted_texture", GL_EXT_paletted_texture_functions }, 1357 { "GL_MESA_resize_buffers", GL_MESA_resize_buffers_functions }, 1358 { "GL_NV_vertex_program", GL_NV_vertex_program_functions }, 1359 { "GL_NV_fragment_program", GL_NV_fragment_program_functions }, 1360 { NULL, NULL } 1361}; 1362#endif 1363 1364/* 1365 * Create a new X/Mesa visual. 1366 * Input: display - X11 display 1367 * visinfo - an XVisualInfo pointer 1368 * rgb_flag - GL_TRUE = RGB mode, 1369 * GL_FALSE = color index mode 1370 * alpha_flag - alpha buffer requested? 1371 * db_flag - GL_TRUE = double-buffered, 1372 * GL_FALSE = single buffered 1373 * stereo_flag - stereo visual? 1374 * ximage_flag - GL_TRUE = use an XImage for back buffer, 1375 * GL_FALSE = use an off-screen pixmap for back buffer 1376 * depth_size - requested bits/depth values, or zero 1377 * stencil_size - requested bits/stencil values, or zero 1378 * accum_red_size - requested bits/red accum values, or zero 1379 * accum_green_size - requested bits/green accum values, or zero 1380 * accum_blue_size - requested bits/blue accum values, or zero 1381 * accum_alpha_size - requested bits/alpha accum values, or zero 1382 * num_samples - number of samples/pixel if multisampling, or zero 1383 * level - visual level, usually 0 1384 * visualCaveat - ala the GLX extension, usually GLX_NONE 1385 * Return; a new XMesaVisual or 0 if error. 1386 */ 1387PUBLIC 1388XMesaVisual XMesaCreateVisual( XMesaDisplay *display, 1389 XMesaVisualInfo visinfo, 1390 GLboolean rgb_flag, 1391 GLboolean alpha_flag, 1392 GLboolean db_flag, 1393 GLboolean stereo_flag, 1394 GLboolean ximage_flag, 1395 GLint depth_size, 1396 GLint stencil_size, 1397 GLint accum_red_size, 1398 GLint accum_green_size, 1399 GLint accum_blue_size, 1400 GLint accum_alpha_size, 1401 GLint num_samples, 1402 GLint level, 1403 GLint visualCaveat ) 1404{ 1405 char *gamma; 1406 XMesaVisual v; 1407 GLint red_bits, green_bits, blue_bits, alpha_bits; 1408 1409#ifdef IN_DRI_DRIVER 1410 /* driInitExtensions() should be called once per screen to setup extension 1411 * indices. There is no need to call it when the context is created since 1412 * XMesa enables mesa sw extensions on its own. 1413 */ 1414 driInitExtensions( NULL, card_extensions, GL_FALSE ); 1415#endif 1416 1417#ifndef XFree86Server 1418 /* For debugging only */ 1419 if (_mesa_getenv("MESA_XSYNC")) { 1420 /* This makes debugging X easier. 1421 * In your debugger, set a breakpoint on _XError to stop when an 1422 * X protocol error is generated. 1423 */ 1424 XSynchronize( display, 1 ); 1425 } 1426#endif 1427 1428 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 1429 if (!v) { 1430 return NULL; 1431 } 1432 1433 v->display = display; 1434 1435 /* Save a copy of the XVisualInfo struct because the user may X_mesa_free() 1436 * the struct but we may need some of the information contained in it 1437 * at a later time. 1438 */ 1439#ifndef XFree86Server 1440 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 1441 if(!v->visinfo) { 1442 _mesa_free(v); 1443 return NULL; 1444 } 1445 MEMCPY(v->visinfo, visinfo, sizeof(*visinfo)); 1446#endif 1447 1448 /* check for MESA_GAMMA environment variable */ 1449 gamma = _mesa_getenv("MESA_GAMMA"); 1450 if (gamma) { 1451 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0; 1452 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma ); 1453 if (v->RedGamma<=0.0) v->RedGamma = 1.0; 1454 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma; 1455 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma; 1456 } 1457 else { 1458 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0; 1459 } 1460 1461 v->ximage_flag = ximage_flag; 1462 1463#ifdef XFree86Server 1464 /* We could calculate these values by ourselves. nplanes is either the sum 1465 * of the red, green, and blue bits or the number index bits. 1466 * ColormapEntries is either (1U << index_bits) or 1467 * (1U << max(redBits, greenBits, blueBits)). 1468 */ 1469 assert(visinfo->nplanes > 0); 1470 v->nplanes = visinfo->nplanes; 1471 v->ColormapEntries = visinfo->ColormapEntries; 1472 1473 v->mesa_visual.redMask = visinfo->redMask; 1474 v->mesa_visual.greenMask = visinfo->greenMask; 1475 v->mesa_visual.blueMask = visinfo->blueMask; 1476 v->mesa_visual.visualID = visinfo->vid; 1477 v->mesa_visual.screen = 0; /* FIXME: What should be done here? */ 1478#else 1479 v->mesa_visual.redMask = visinfo->red_mask; 1480 v->mesa_visual.greenMask = visinfo->green_mask; 1481 v->mesa_visual.blueMask = visinfo->blue_mask; 1482 v->mesa_visual.visualID = visinfo->visualid; 1483 v->mesa_visual.screen = visinfo->screen; 1484#endif 1485 1486#if defined(XFree86Server) || !(defined(__cplusplus) || defined(c_plusplus)) 1487 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->class); 1488#else 1489 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->c_class); 1490#endif 1491 1492 v->mesa_visual.visualRating = visualCaveat; 1493 1494 if (alpha_flag) 1495 v->mesa_visual.alphaBits = 8; 1496 1497 (void) initialize_visual_and_buffer( v, NULL, rgb_flag, 0, 0 ); 1498 1499 { 1500 const int xclass = v->mesa_visual.visualType; 1501 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { 1502 red_bits = _mesa_bitcount(GET_REDMASK(v)); 1503 green_bits = _mesa_bitcount(GET_GREENMASK(v)); 1504 blue_bits = _mesa_bitcount(GET_BLUEMASK(v)); 1505 } 1506 else { 1507 /* this is an approximation */ 1508 int depth; 1509 depth = GET_VISUAL_DEPTH(v); 1510 red_bits = depth / 3; 1511 depth -= red_bits; 1512 green_bits = depth / 2; 1513 depth -= green_bits; 1514 blue_bits = depth; 1515 alpha_bits = 0; 1516 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) ); 1517 } 1518 alpha_bits = v->mesa_visual.alphaBits; 1519 } 1520 1521 _mesa_initialize_visual( &v->mesa_visual, 1522 rgb_flag, db_flag, stereo_flag, 1523 red_bits, green_bits, 1524 blue_bits, alpha_bits, 1525 v->mesa_visual.indexBits, 1526 depth_size, 1527 stencil_size, 1528 accum_red_size, accum_green_size, 1529 accum_blue_size, accum_alpha_size, 1530 0 ); 1531 1532 /* XXX minor hack */ 1533 v->mesa_visual.level = level; 1534 return v; 1535} 1536 1537 1538PUBLIC 1539void XMesaDestroyVisual( XMesaVisual v ) 1540{ 1541#ifndef XFree86Server 1542 _mesa_free(v->visinfo); 1543#endif 1544 _mesa_free(v); 1545} 1546 1547 1548 1549/** 1550 * Create a new XMesaContext. 1551 * \param v the XMesaVisual 1552 * \param share_list another XMesaContext with which to share display 1553 * lists or NULL if no sharing is wanted. 1554 * \return an XMesaContext or NULL if error. 1555 */ 1556PUBLIC 1557XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) 1558{ 1559 static GLboolean firstTime = GL_TRUE; 1560 XMesaContext c; 1561 GLcontext *mesaCtx; 1562 struct dd_function_table functions; 1563 TNLcontext *tnl; 1564 1565 if (firstTime) { 1566 _glthread_INIT_MUTEX(_xmesa_lock); 1567 firstTime = GL_FALSE; 1568 } 1569 1570 /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */ 1571 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 1572 if (!c) 1573 return NULL; 1574 1575 mesaCtx = &(c->mesa); 1576 1577 /* initialize with default driver functions, then plug in XMesa funcs */ 1578 _mesa_init_driver_functions(&functions); 1579 xmesa_init_driver_functions(v, &functions); 1580 if (!_mesa_initialize_context(mesaCtx, &v->mesa_visual, 1581 share_list ? &(share_list->mesa) : (GLcontext *) NULL, 1582 &functions, (void *) c)) { 1583 _mesa_free(c); 1584 return NULL; 1585 } 1586 1587 /* Enable this to exercise fixed function -> shader translation 1588 * with software rendering. 1589 */ 1590 if (0) { 1591 mesaCtx->VertexProgram._MaintainTnlProgram = GL_TRUE; 1592 mesaCtx->FragmentProgram._MaintainTexEnvProgram = GL_TRUE; 1593 } 1594 1595 _mesa_enable_sw_extensions(mesaCtx); 1596 _mesa_enable_1_3_extensions(mesaCtx); 1597 _mesa_enable_1_4_extensions(mesaCtx); 1598 _mesa_enable_1_5_extensions(mesaCtx); 1599 _mesa_enable_2_0_extensions(mesaCtx); 1600 _mesa_enable_2_1_extensions(mesaCtx); 1601#if ENABLE_EXT_texure_compression_s3tc 1602 if (mesaCtx->Mesa_DXTn) { 1603 _mesa_enable_extension(mesaCtx, "GL_EXT_texture_compression_s3tc"); 1604 _mesa_enable_extension(mesaCtx, "GL_S3_s3tc"); 1605 } 1606 _mesa_enable_extension(mesaCtx, "GL_3DFX_texture_compression_FXT1"); 1607#endif 1608#if ENABLE_EXT_timer_query 1609 _mesa_enable_extension(mesaCtx, "GL_EXT_timer_query"); 1610#endif 1611 1612#ifdef XFree86Server 1613 /* If we're running in the X server, do bounds checking to prevent 1614 * segfaults and server crashes! 1615 */ 1616 mesaCtx->Const.CheckArrayBounds = GL_TRUE; 1617#endif 1618 1619 /* finish up xmesa context initializations */ 1620 c->swapbytes = CHECK_BYTE_ORDER(v) ? GL_FALSE : GL_TRUE; 1621 c->xm_visual = v; 1622 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ 1623 c->display = v->display; 1624 c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */ 1625 1626 /* Initialize the software rasterizer and helper modules. 1627 */ 1628 if (!_swrast_CreateContext( mesaCtx ) || 1629 !_vbo_CreateContext( mesaCtx ) || 1630 !_tnl_CreateContext( mesaCtx ) || 1631 !_swsetup_CreateContext( mesaCtx )) { 1632 _mesa_free_context_data(&c->mesa); 1633 _mesa_free(c); 1634 return NULL; 1635 } 1636 1637 /* tnl setup */ 1638 tnl = TNL_CONTEXT(mesaCtx); 1639 tnl->Driver.RunPipeline = _tnl_run_pipeline; 1640 /* swrast setup */ 1641 xmesa_register_swrast_functions( mesaCtx ); 1642 _swsetup_Wakeup(mesaCtx); 1643 1644 return c; 1645} 1646 1647 1648 1649PUBLIC 1650void XMesaDestroyContext( XMesaContext c ) 1651{ 1652 GLcontext *mesaCtx = &c->mesa; 1653 1654#ifdef FX 1655 FXdestroyContext( XMESA_BUFFER(mesaCtx->DrawBuffer) ); 1656#endif 1657 1658 _swsetup_DestroyContext( mesaCtx ); 1659 _swrast_DestroyContext( mesaCtx ); 1660 _tnl_DestroyContext( mesaCtx ); 1661 _vbo_DestroyContext( mesaCtx ); 1662 _mesa_free_context_data( mesaCtx ); 1663 _mesa_free( c ); 1664} 1665 1666 1667 1668/** 1669 * Private function for creating an XMesaBuffer which corresponds to an 1670 * X window or pixmap. 1671 * \param v the window's XMesaVisual 1672 * \param w the window we're wrapping 1673 * \return new XMesaBuffer or NULL if error 1674 */ 1675PUBLIC XMesaBuffer 1676XMesaCreateWindowBuffer(XMesaVisual v, XMesaWindow w) 1677{ 1678#ifndef XFree86Server 1679 XWindowAttributes attr; 1680#endif 1681 XMesaBuffer b; 1682 XMesaColormap cmap; 1683 int depth; 1684 1685 assert(v); 1686 assert(w); 1687 1688 /* Check that window depth matches visual depth */ 1689#ifdef XFree86Server 1690 depth = ((XMesaDrawable)w)->depth; 1691#else 1692 XGetWindowAttributes( v->display, w, &attr ); 1693 depth = attr.depth; 1694#endif 1695 if (GET_VISUAL_DEPTH(v) != depth) { 1696 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n", 1697 GET_VISUAL_DEPTH(v), depth); 1698 return NULL; 1699 } 1700 1701 /* Find colormap */ 1702#ifdef XFree86Server 1703 cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP); 1704#else 1705 if (attr.colormap) { 1706 cmap = attr.colormap; 1707 } 1708 else { 1709 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w); 1710 /* this is weird, a window w/out a colormap!? */ 1711 /* OK, let's just allocate a new one and hope for the best */ 1712 cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 1713 } 1714#endif 1715 1716 b = create_xmesa_buffer((XMesaDrawable) w, WINDOW, v, cmap); 1717 if (!b) 1718 return NULL; 1719 1720 if (!initialize_visual_and_buffer( v, b, v->mesa_visual.rgbMode, 1721 (XMesaDrawable) w, cmap )) { 1722 xmesa_free_buffer(b); 1723 return NULL; 1724 } 1725 1726 return b; 1727} 1728 1729 1730 1731/** 1732 * Create a new XMesaBuffer from an X pixmap. 1733 * 1734 * \param v the XMesaVisual 1735 * \param p the pixmap 1736 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or 1737 * \c GLX_DIRECT_COLOR visual for the pixmap 1738 * \returns new XMesaBuffer or NULL if error 1739 */ 1740PUBLIC XMesaBuffer 1741XMesaCreatePixmapBuffer(XMesaVisual v, XMesaPixmap p, XMesaColormap cmap) 1742{ 1743 XMesaBuffer b; 1744 1745 assert(v); 1746 1747 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap); 1748 if (!b) 1749 return NULL; 1750 1751 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 1752 (XMesaDrawable) p, cmap)) { 1753 xmesa_free_buffer(b); 1754 return NULL; 1755 } 1756 1757 return b; 1758} 1759 1760 1761/** 1762 * For GLX_EXT_texture_from_pixmap 1763 */ 1764XMesaBuffer 1765XMesaCreatePixmapTextureBuffer(XMesaVisual v, XMesaPixmap p, 1766 XMesaColormap cmap, 1767 int format, int target, int mipmap) 1768{ 1769 GET_CURRENT_CONTEXT(ctx); 1770 XMesaBuffer b; 1771 GLuint width, height; 1772 1773 assert(v); 1774 1775 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap); 1776 if (!b) 1777 return NULL; 1778 1779 /* get pixmap size, update framebuffer/renderbuffer dims */ 1780 xmesa_get_window_size(v->display, b, &width, &height); 1781 _mesa_resize_framebuffer(NULL, &(b->mesa_buffer), width, height); 1782 1783 if (target == 0) { 1784 /* examine dims */ 1785 if (ctx->Extensions.ARB_texture_non_power_of_two) { 1786 target = GLX_TEXTURE_2D_EXT; 1787 } 1788 else if ( _mesa_bitcount(width) == 1 1789 && _mesa_bitcount(height) == 1) { 1790 /* power of two size */ 1791 if (height == 1) { 1792 target = GLX_TEXTURE_1D_EXT; 1793 } 1794 else { 1795 target = GLX_TEXTURE_2D_EXT; 1796 } 1797 } 1798 else if (ctx->Extensions.NV_texture_rectangle) { 1799 target = GLX_TEXTURE_RECTANGLE_EXT; 1800 } 1801 else { 1802 /* non power of two textures not supported */ 1803 XMesaDestroyBuffer(b); 1804 return 0; 1805 } 1806 } 1807 1808 b->TextureTarget = target; 1809 b->TextureFormat = format; 1810 b->TextureMipmap = mipmap; 1811 1812 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 1813 (XMesaDrawable) p, cmap)) { 1814 xmesa_free_buffer(b); 1815 return NULL; 1816 } 1817 1818 return b; 1819} 1820 1821 1822 1823XMesaBuffer 1824XMesaCreatePBuffer(XMesaVisual v, XMesaColormap cmap, 1825 unsigned int width, unsigned int height) 1826{ 1827#ifndef XFree86Server 1828 XMesaWindow root; 1829 XMesaDrawable drawable; /* X Pixmap Drawable */ 1830 XMesaBuffer b; 1831 1832 /* allocate pixmap for front buffer */ 1833 root = RootWindow( v->display, v->visinfo->screen ); 1834 drawable = XCreatePixmap(v->display, root, width, height, 1835 v->visinfo->depth); 1836 if (!drawable) 1837 return NULL; 1838 1839 b = create_xmesa_buffer(drawable, PBUFFER, v, cmap); 1840 if (!b) 1841 return NULL; 1842 1843 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 1844 drawable, cmap)) { 1845 xmesa_free_buffer(b); 1846 return NULL; 1847 } 1848 1849 return b; 1850#else 1851 return 0; 1852#endif 1853} 1854 1855 1856 1857/* 1858 * Deallocate an XMesaBuffer structure and all related info. 1859 */ 1860PUBLIC void 1861XMesaDestroyBuffer(XMesaBuffer b) 1862{ 1863 xmesa_free_buffer(b); 1864} 1865 1866 1867/** 1868 * Query the current window size and update the corresponding GLframebuffer 1869 * and all attached renderbuffers. 1870 * Called when: 1871 * 1. the first time a buffer is bound to a context. 1872 * 2. from glViewport to poll for window size changes 1873 * 3. from the XMesaResizeBuffers() API function. 1874 * Note: it's possible (and legal) for xmctx to be NULL. That can happen 1875 * when resizing a buffer when no rendering context is bound. 1876 */ 1877void 1878xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer) 1879{ 1880 GLuint width, height; 1881 xmesa_get_window_size(drawBuffer->display, drawBuffer, &width, &height); 1882 if (drawBuffer->mesa_buffer.Width != width || 1883 drawBuffer->mesa_buffer.Height != height) { 1884 GLcontext *ctx = xmctx ? &xmctx->mesa : NULL; 1885 _mesa_resize_framebuffer(ctx, &(drawBuffer->mesa_buffer), width, height); 1886 } 1887 drawBuffer->mesa_buffer.Initialized = GL_TRUE; /* XXX TEMPORARY? */ 1888} 1889 1890 1891/* 1892 * Bind buffer b to context c and make c the current rendering context. 1893 */ 1894GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b ) 1895{ 1896 return XMesaMakeCurrent2( c, b, b ); 1897} 1898 1899 1900/* 1901 * Bind buffer b to context c and make c the current rendering context. 1902 */ 1903PUBLIC 1904GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, 1905 XMesaBuffer readBuffer ) 1906{ 1907 if (c) { 1908 if (!drawBuffer || !readBuffer) 1909 return GL_FALSE; /* must specify buffers! */ 1910 1911 if (&(c->mesa) == _mesa_get_current_context() 1912 && c->mesa.DrawBuffer == &drawBuffer->mesa_buffer 1913 && c->mesa.ReadBuffer == &readBuffer->mesa_buffer 1914 && XMESA_BUFFER(c->mesa.DrawBuffer)->wasCurrent) { 1915 /* same context and buffer, do nothing */ 1916 return GL_TRUE; 1917 } 1918 1919 c->xm_buffer = drawBuffer; 1920 1921#ifdef FX 1922 if (FXmakeCurrent( drawBuffer )) 1923 return GL_TRUE; 1924#endif 1925 1926 /* Call this periodically to detect when the user has begun using 1927 * GL rendering from multiple threads. 1928 */ 1929 _glapi_check_multithread(); 1930 1931 xmesa_check_and_update_buffer_size(c, drawBuffer); 1932 if (readBuffer != drawBuffer) 1933 xmesa_check_and_update_buffer_size(c, readBuffer); 1934 1935 _mesa_make_current(&(c->mesa), 1936 &drawBuffer->mesa_buffer, 1937 &readBuffer->mesa_buffer); 1938 1939 if (c->xm_visual->mesa_visual.rgbMode) { 1940 /* 1941 * Must recompute and set these pixel values because colormap 1942 * can be different for different windows. 1943 */ 1944 c->clearpixel = xmesa_color_to_pixel( &c->mesa, 1945 c->clearcolor[0], 1946 c->clearcolor[1], 1947 c->clearcolor[2], 1948 c->clearcolor[3], 1949 c->xm_visual->undithered_pf); 1950 XMesaSetForeground(c->display, drawBuffer->cleargc, c->clearpixel); 1951 } 1952 1953 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 1954 drawBuffer->wasCurrent = GL_TRUE; 1955 } 1956 else { 1957 /* Detach */ 1958 _mesa_make_current( NULL, NULL, NULL ); 1959 } 1960 return GL_TRUE; 1961} 1962 1963 1964/* 1965 * Unbind the context c from its buffer. 1966 */ 1967GLboolean XMesaUnbindContext( XMesaContext c ) 1968{ 1969 /* A no-op for XFree86 integration purposes */ 1970 return GL_TRUE; 1971} 1972 1973 1974XMesaContext XMesaGetCurrentContext( void ) 1975{ 1976 GET_CURRENT_CONTEXT(ctx); 1977 if (ctx) { 1978 XMesaContext xmesa = XMESA_CONTEXT(ctx); 1979 return xmesa; 1980 } 1981 else { 1982 return 0; 1983 } 1984} 1985 1986 1987XMesaBuffer XMesaGetCurrentBuffer( void ) 1988{ 1989 GET_CURRENT_CONTEXT(ctx); 1990 if (ctx) { 1991 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer); 1992 return xmbuf; 1993 } 1994 else { 1995 return 0; 1996 } 1997} 1998 1999 2000/* New in Mesa 3.1 */ 2001XMesaBuffer XMesaGetCurrentReadBuffer( void ) 2002{ 2003 GET_CURRENT_CONTEXT(ctx); 2004 if (ctx) { 2005 return XMESA_BUFFER(ctx->ReadBuffer); 2006 } 2007 else { 2008 return 0; 2009 } 2010} 2011 2012 2013#ifdef XFree86Server 2014PUBLIC 2015GLboolean XMesaForceCurrent(XMesaContext c) 2016{ 2017 if (c) { 2018 _glapi_set_dispatch(c->mesa.CurrentDispatch); 2019 2020 if (&(c->mesa) != _mesa_get_current_context()) { 2021 _mesa_make_current(&c->mesa, c->mesa.DrawBuffer, c->mesa.ReadBuffer); 2022 } 2023 } 2024 else { 2025 _mesa_make_current(NULL, NULL, NULL); 2026 } 2027 return GL_TRUE; 2028} 2029 2030 2031PUBLIC 2032GLboolean XMesaLoseCurrent(XMesaContext c) 2033{ 2034 (void) c; 2035 _mesa_make_current(NULL, NULL, NULL); 2036 return GL_TRUE; 2037} 2038 2039 2040PUBLIC 2041GLboolean XMesaCopyContext( XMesaContext xm_src, XMesaContext xm_dst, GLuint mask ) 2042{ 2043 _mesa_copy_context(&xm_src->mesa, &xm_dst->mesa, mask); 2044 return GL_TRUE; 2045} 2046#endif /* XFree86Server */ 2047 2048 2049#ifndef FX 2050GLboolean XMesaSetFXmode( GLint mode ) 2051{ 2052 (void) mode; 2053 return GL_FALSE; 2054} 2055#endif 2056 2057 2058 2059/* 2060 * Copy the back buffer to the front buffer. If there's no back buffer 2061 * this is a no-op. 2062 */ 2063PUBLIC 2064void XMesaSwapBuffers( XMesaBuffer b ) 2065{ 2066 GET_CURRENT_CONTEXT(ctx); 2067 2068 if (!b->backxrb) { 2069 /* single buffered */ 2070 return; 2071 } 2072 2073 /* If we're swapping the buffer associated with the current context 2074 * we have to flush any pending rendering commands first. 2075 */ 2076 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2077 _mesa_notifySwapBuffers(ctx); 2078 2079 if (b->db_mode) { 2080#ifdef FX 2081 if (FXswapBuffers(b)) 2082 return; 2083#endif 2084 if (b->backxrb->ximage) { 2085 /* Copy Ximage (back buf) from client memory to server window */ 2086#if defined(USE_XSHM) && !defined(XFree86Server) 2087 if (b->shm) { 2088 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2089 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable, 2090 b->swapgc, 2091 b->backxrb->ximage, 0, 0, 2092 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height, 2093 False ); 2094 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2095 } 2096 else 2097#endif 2098 { 2099 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2100 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable, 2101 b->swapgc, 2102 b->backxrb->ximage, 0, 0, 2103 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height ); 2104 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2105 } 2106 } 2107 else if (b->backxrb->pixmap) { 2108 /* Copy pixmap (back buf) to window (front buf) on server */ 2109 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2110 XMesaCopyArea( b->xm_visual->display, 2111 b->backxrb->pixmap, /* source drawable */ 2112 b->frontxrb->drawable, /* dest. drawable */ 2113 b->swapgc, 2114 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height, 2115 0, 0 /* dest region */ 2116 ); 2117 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2118 } 2119 2120 if (b->swAlpha) 2121 _mesa_copy_soft_alpha_renderbuffers(ctx, &b->mesa_buffer); 2122 } 2123#if !defined(XFree86Server) 2124 XSync( b->xm_visual->display, False ); 2125#endif 2126} 2127 2128 2129 2130/* 2131 * Copy sub-region of back buffer to front buffer 2132 */ 2133void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 2134{ 2135 GET_CURRENT_CONTEXT(ctx); 2136 2137 /* If we're swapping the buffer associated with the current context 2138 * we have to flush any pending rendering commands first. 2139 */ 2140 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2141 _mesa_notifySwapBuffers(ctx); 2142 2143 if (!b->backxrb) { 2144 /* single buffered */ 2145 return; 2146 } 2147 2148 if (b->db_mode) { 2149 int yTop = b->mesa_buffer.Height - y - height; 2150#ifdef FX 2151 if (FXswapBuffers(b)) 2152 return; 2153#endif 2154 if (b->backxrb->ximage) { 2155 /* Copy Ximage from host's memory to server's window */ 2156#if defined(USE_XSHM) && !defined(XFree86Server) 2157 if (b->shm) { 2158 /* XXX assuming width and height aren't too large! */ 2159 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable, 2160 b->swapgc, 2161 b->backxrb->ximage, x, yTop, 2162 x, yTop, width, height, False ); 2163 /* wait for finished event??? */ 2164 } 2165 else 2166#endif 2167 { 2168 /* XXX assuming width and height aren't too large! */ 2169 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable, 2170 b->swapgc, 2171 b->backxrb->ximage, x, yTop, 2172 x, yTop, width, height ); 2173 } 2174 } 2175 else { 2176 /* Copy pixmap to window on server */ 2177 XMesaCopyArea( b->xm_visual->display, 2178 b->backxrb->pixmap, /* source drawable */ 2179 b->frontxrb->drawable, /* dest. drawable */ 2180 b->swapgc, 2181 x, yTop, width, height, /* source region */ 2182 x, yTop /* dest region */ 2183 ); 2184 } 2185 } 2186} 2187 2188 2189/* 2190 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function 2191 * is a way to get "under the hood" of X/Mesa so one can manipulate the 2192 * back buffer directly. 2193 * Output: pixmap - pointer to back buffer's Pixmap, or 0 2194 * ximage - pointer to back buffer's XImage, or NULL 2195 * Return: GL_TRUE = context is double buffered 2196 * GL_FALSE = context is single buffered 2197 */ 2198#ifndef XFree86Server 2199GLboolean XMesaGetBackBuffer( XMesaBuffer b, 2200 XMesaPixmap *pixmap, 2201 XMesaImage **ximage ) 2202{ 2203 if (b->db_mode) { 2204 if (pixmap) 2205 *pixmap = b->backxrb->pixmap; 2206 if (ximage) 2207 *ximage = b->backxrb->ximage; 2208 return GL_TRUE; 2209 } 2210 else { 2211 *pixmap = 0; 2212 *ximage = NULL; 2213 return GL_FALSE; 2214 } 2215} 2216#endif /* XFree86Server */ 2217 2218 2219/* 2220 * Return the depth buffer associated with an XMesaBuffer. 2221 * Input: b - the XMesa buffer handle 2222 * Output: width, height - size of buffer in pixels 2223 * bytesPerValue - bytes per depth value (2 or 4) 2224 * buffer - pointer to depth buffer values 2225 * Return: GL_TRUE or GL_FALSE to indicate success or failure. 2226 */ 2227GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height, 2228 GLint *bytesPerValue, void **buffer ) 2229{ 2230 struct gl_renderbuffer *rb 2231 = b->mesa_buffer.Attachment[BUFFER_DEPTH].Renderbuffer; 2232 if (!rb || !rb->Data) { 2233 *width = 0; 2234 *height = 0; 2235 *bytesPerValue = 0; 2236 *buffer = 0; 2237 return GL_FALSE; 2238 } 2239 else { 2240 *width = b->mesa_buffer.Width; 2241 *height = b->mesa_buffer.Height; 2242 *bytesPerValue = b->mesa_buffer.Visual.depthBits <= 16 2243 ? sizeof(GLushort) : sizeof(GLuint); 2244 *buffer = rb->Data; 2245 return GL_TRUE; 2246 } 2247} 2248 2249 2250void XMesaFlush( XMesaContext c ) 2251{ 2252 if (c && c->xm_visual) { 2253#ifdef XFree86Server 2254 /* NOT_NEEDED */ 2255#else 2256 XSync( c->xm_visual->display, False ); 2257#endif 2258 } 2259} 2260 2261 2262 2263const char *XMesaGetString( XMesaContext c, int name ) 2264{ 2265 (void) c; 2266 if (name==XMESA_VERSION) { 2267 return "5.0"; 2268 } 2269 else if (name==XMESA_EXTENSIONS) { 2270 return ""; 2271 } 2272 else { 2273 return NULL; 2274 } 2275} 2276 2277 2278 2279XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d ) 2280{ 2281 XMesaBuffer b; 2282 for (b=XMesaBufferList; b; b=b->Next) { 2283 if (b->frontxrb->drawable == d && b->display == dpy) { 2284 return b; 2285 } 2286 } 2287 return NULL; 2288} 2289 2290 2291/** 2292 * Free/destroy all XMesaBuffers associated with given display. 2293 */ 2294void xmesa_destroy_buffers_on_display(XMesaDisplay *dpy) 2295{ 2296 XMesaBuffer b, next; 2297 for (b = XMesaBufferList; b; b = next) { 2298 next = b->Next; 2299 if (b->display == dpy) { 2300 xmesa_free_buffer(b); 2301 } 2302 } 2303} 2304 2305 2306/* 2307 * Look for XMesaBuffers whose X window has been destroyed. 2308 * Deallocate any such XMesaBuffers. 2309 */ 2310void XMesaGarbageCollect( void ) 2311{ 2312 XMesaBuffer b, next; 2313 for (b=XMesaBufferList; b; b=next) { 2314 next = b->Next; 2315 if (b->display && b->frontxrb->drawable && b->type == WINDOW) { 2316#ifdef XFree86Server 2317 /* NOT_NEEDED */ 2318#else 2319 XSync(b->display, False); 2320 if (!window_exists( b->display, b->frontxrb->drawable )) { 2321 /* found a dead window, free the ancillary info */ 2322 XMesaDestroyBuffer( b ); 2323 } 2324#endif 2325 } 2326 } 2327} 2328 2329 2330unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y, 2331 GLfloat red, GLfloat green, 2332 GLfloat blue, GLfloat alpha ) 2333{ 2334 GLcontext *ctx = &xmesa->mesa; 2335 GLint r = (GLint) (red * 255.0F); 2336 GLint g = (GLint) (green * 255.0F); 2337 GLint b = (GLint) (blue * 255.0F); 2338 GLint a = (GLint) (alpha * 255.0F); 2339 2340 switch (xmesa->pixelformat) { 2341 case PF_Index: 2342 return 0; 2343 case PF_Truecolor: 2344 { 2345 unsigned long p; 2346 PACK_TRUECOLOR( p, r, g, b ); 2347 return p; 2348 } 2349 case PF_8A8B8G8R: 2350 return PACK_8A8B8G8R( r, g, b, a ); 2351 case PF_8A8R8G8B: 2352 return PACK_8A8R8G8B( r, g, b, a ); 2353 case PF_8R8G8B: 2354 return PACK_8R8G8B( r, g, b ); 2355 case PF_5R6G5B: 2356 return PACK_5R6G5B( r, g, b ); 2357 case PF_Dither: 2358 { 2359 DITHER_SETUP; 2360 return DITHER( x, y, r, g, b ); 2361 } 2362 case PF_1Bit: 2363 /* 382 = (3*255)/2 */ 2364 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 2365 case PF_HPCR: 2366 return DITHER_HPCR(x, y, r, g, b); 2367 case PF_Lookup: 2368 { 2369 LOOKUP_SETUP; 2370 return LOOKUP( r, g, b ); 2371 } 2372 case PF_Grayscale: 2373 return GRAY_RGB( r, g, b ); 2374 case PF_Dither_5R6G5B: 2375 /* fall through */ 2376 case PF_Dither_True: 2377 { 2378 unsigned long p; 2379 PACK_TRUEDITHER(p, x, y, r, g, b); 2380 return p; 2381 } 2382 default: 2383 _mesa_problem(NULL, "Bad pixel format in XMesaDitherColor"); 2384 } 2385 return 0; 2386} 2387 2388 2389/* 2390 * This is typically called when the window size changes and we need 2391 * to reallocate the buffer's back/depth/stencil/accum buffers. 2392 */ 2393PUBLIC void 2394XMesaResizeBuffers( XMesaBuffer b ) 2395{ 2396 GET_CURRENT_CONTEXT(ctx); 2397 XMesaContext xmctx = XMESA_CONTEXT(ctx); 2398 if (!xmctx) 2399 return; 2400 xmesa_check_and_update_buffer_size(xmctx, b); 2401} 2402 2403 2404static GLint 2405xbuffer_to_renderbuffer(int buffer) 2406{ 2407 assert(MAX_AUX_BUFFERS <= 4); 2408 2409 switch (buffer) { 2410 case GLX_FRONT_LEFT_EXT: 2411 return BUFFER_FRONT_LEFT; 2412 case GLX_FRONT_RIGHT_EXT: 2413 return BUFFER_FRONT_RIGHT; 2414 case GLX_BACK_LEFT_EXT: 2415 return BUFFER_BACK_LEFT; 2416 case GLX_BACK_RIGHT_EXT: 2417 return BUFFER_BACK_RIGHT; 2418 case GLX_AUX0_EXT: 2419 return BUFFER_AUX0; 2420 case GLX_AUX1_EXT: 2421 case GLX_AUX2_EXT: 2422 case GLX_AUX3_EXT: 2423 case GLX_AUX4_EXT: 2424 case GLX_AUX5_EXT: 2425 case GLX_AUX6_EXT: 2426 case GLX_AUX7_EXT: 2427 case GLX_AUX8_EXT: 2428 case GLX_AUX9_EXT: 2429 default: 2430 /* BadValue error */ 2431 return -1; 2432 } 2433} 2434 2435 2436PUBLIC void 2437XMesaBindTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer, 2438 const int *attrib_list) 2439{ 2440#if 0 2441 GET_CURRENT_CONTEXT(ctx); 2442 const GLuint unit = ctx->Texture.CurrentUnit; 2443 struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit]; 2444 struct gl_texture_object *texObj; 2445#endif 2446 struct gl_renderbuffer *rb; 2447 struct xmesa_renderbuffer *xrb; 2448 GLint b; 2449 XMesaImage *img = NULL; 2450 GLboolean freeImg = GL_FALSE; 2451 2452 b = xbuffer_to_renderbuffer(buffer); 2453 if (b < 0) 2454 return; 2455 2456 if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_NONE_EXT) 2457 return; /* BadMatch error */ 2458 2459 rb = drawable->mesa_buffer.Attachment[b].Renderbuffer; 2460 if (!rb) { 2461 /* invalid buffer */ 2462 return; 2463 } 2464 xrb = xmesa_renderbuffer(rb); 2465 2466#if 0 2467 switch (drawable->TextureTarget) { 2468 case GLX_TEXTURE_1D_EXT: 2469 texObj = texUnit->CurrentTex[TEXTURE_1D_INDEX]; 2470 break; 2471 case GLX_TEXTURE_2D_EXT: 2472 texObj = texUnit->CurrentTex[TEXTURE_2D_INDEX]; 2473 break; 2474 case GLX_TEXTURE_RECTANGLE_EXT: 2475 texObj = texUnit->CurrentTex[TEXTURE_RECT_INDEX]; 2476 break; 2477 default: 2478 return; /* BadMatch error */ 2479 } 2480#endif 2481 2482 /* 2483 * The following is a quick and simple way to implement 2484 * BindTexImage. The better way is to write some new FetchTexel() 2485 * functions which would extract texels from XImages. We'd still 2486 * need to use GetImage when texturing from a Pixmap (front buffer) 2487 * but texturing from a back buffer (XImage) would avoid an image 2488 * copy. 2489 */ 2490 2491 /* get XImage */ 2492 if (xrb->pixmap) { 2493 img = XMesaGetImage(dpy, xrb->pixmap, 0, 0, rb->Width, rb->Height, ~0L, 2494 ZPixmap); 2495 freeImg = GL_TRUE; 2496 } 2497 else if (xrb->ximage) { 2498 img = xrb->ximage; 2499 } 2500 2501 /* store the XImage as a new texture image */ 2502 if (img) { 2503 GLenum format, type, intFormat; 2504 if (img->bits_per_pixel == 32) { 2505 format = GL_BGRA; 2506 type = GL_UNSIGNED_BYTE; 2507 intFormat = GL_RGBA; 2508 } 2509 else if (img->bits_per_pixel == 24) { 2510 format = GL_BGR; 2511 type = GL_UNSIGNED_BYTE; 2512 intFormat = GL_RGB; 2513 } 2514 else if (img->bits_per_pixel == 16) { 2515 format = GL_BGR; 2516 type = GL_UNSIGNED_SHORT_5_6_5; 2517 intFormat = GL_RGB; 2518 } 2519 else { 2520 _mesa_problem(NULL, "Unexpected XImage format in XMesaBindTexImage"); 2521 return; 2522 } 2523 if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGBA_EXT) { 2524 intFormat = GL_RGBA; 2525 } 2526 else if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGB_EXT) { 2527 intFormat = GL_RGB; 2528 } 2529 2530 _mesa_TexImage2D(GL_TEXTURE_2D, 0, intFormat, rb->Width, rb->Height, 0, 2531 format, type, img->data); 2532 2533 if (freeImg) { 2534 XMesaDestroyImage(img); 2535 } 2536 } 2537} 2538 2539 2540 2541PUBLIC void 2542XMesaReleaseTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer) 2543{ 2544 const GLint b = xbuffer_to_renderbuffer(buffer); 2545 if (b < 0) 2546 return; 2547 2548 /* no-op for now */ 2549} 2550 2551