xm_api.c revision b11a8ea863612827fe04b636f1c2eae9e1536fbd
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#include "drivers/common/meta.h" 83 84/** 85 * Global X driver lock 86 */ 87_glthread_Mutex _xmesa_lock; 88 89 90 91/** 92 * Lookup tables for HPCR pixel format: 93 */ 94static short hpcr_rgbTbl[3][256] = { 95{ 96 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 97 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 98 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 99 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 100 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 101 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 102 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 103 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 104112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 105128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 106144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 107160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 108176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 109192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 110208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 111224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 112}, 113{ 114 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 115 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 116 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 117 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 118 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 119 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 120 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 121 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 122112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 123128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 124144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 125160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 126176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 127192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 128208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 129224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 130}, 131{ 132 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 133 40, 40, 41, 41, 42, 42, 43, 43, 44, 44, 45, 45, 46, 46, 47, 47, 134 48, 48, 49, 49, 50, 50, 51, 51, 52, 52, 53, 53, 54, 54, 55, 55, 135 56, 56, 57, 57, 58, 58, 59, 59, 60, 60, 61, 61, 62, 62, 63, 63, 136 64, 64, 65, 65, 66, 66, 67, 67, 68, 68, 69, 69, 70, 70, 71, 71, 137 72, 72, 73, 73, 74, 74, 75, 75, 76, 76, 77, 77, 78, 78, 79, 79, 138 80, 80, 81, 81, 82, 82, 83, 83, 84, 84, 85, 85, 86, 86, 87, 87, 139 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 140 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 141112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 142128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 143144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 144160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 145176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 146192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 147208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223 148} 149}; 150 151 152 153/**********************************************************************/ 154/***** X Utility Functions *****/ 155/**********************************************************************/ 156 157 158/** 159 * Return the host's byte order as LSBFirst or MSBFirst ala X. 160 */ 161#ifndef XFree86Server 162static int host_byte_order( void ) 163{ 164 int i = 1; 165 char *cptr = (char *) &i; 166 return (*cptr==1) ? LSBFirst : MSBFirst; 167} 168#endif 169 170 171/** 172 * Check if the X Shared Memory extension is available. 173 * Return: 0 = not available 174 * 1 = shared XImage support available 175 * 2 = shared Pixmap support available also 176 */ 177static int check_for_xshm( XMesaDisplay *display ) 178{ 179#if defined(USE_XSHM) && !defined(XFree86Server) 180 int major, minor, ignore; 181 Bool pixmaps; 182 183 if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) { 184 if (XShmQueryVersion( display, &major, &minor, &pixmaps )==True) { 185 return (pixmaps==True) ? 2 : 1; 186 } 187 else { 188 return 0; 189 } 190 } 191 else { 192 return 0; 193 } 194#else 195 /* No XSHM support */ 196 return 0; 197#endif 198} 199 200 201/** 202 * Apply gamma correction to an intensity value in [0..max]. Return the 203 * new intensity value. 204 */ 205static GLint 206gamma_adjust( GLfloat gamma, GLint value, GLint max ) 207{ 208 if (gamma == 1.0) { 209 return value; 210 } 211 else { 212 double x = (double) value / (double) max; 213 return IROUND_POS((GLfloat) max * _mesa_pow(x, 1.0F/gamma)); 214 } 215} 216 217 218 219/** 220 * Return the true number of bits per pixel for XImages. 221 * For example, if we request a 24-bit deep visual we may actually need/get 222 * 32bpp XImages. This function returns the appropriate bpp. 223 * Input: dpy - the X display 224 * visinfo - desribes the visual to be used for XImages 225 * Return: true number of bits per pixel for XImages 226 */ 227static int 228bits_per_pixel( XMesaVisual xmv ) 229{ 230#ifdef XFree86Server 231 const int depth = xmv->nplanes; 232 int i; 233 assert(depth > 0); 234 for (i = 0; i < screenInfo.numPixmapFormats; i++) { 235 if (screenInfo.formats[i].depth == depth) 236 return screenInfo.formats[i].bitsPerPixel; 237 } 238 return depth; /* should never get here, but this should be safe */ 239#else 240 XMesaDisplay *dpy = xmv->display; 241 XMesaVisualInfo visinfo = xmv->visinfo; 242 XMesaImage *img; 243 int bitsPerPixel; 244 /* Create a temporary XImage */ 245 img = XCreateImage( dpy, visinfo->visual, visinfo->depth, 246 ZPixmap, 0, /*format, offset*/ 247 (char*) MALLOC(8), /*data*/ 248 1, 1, /*width, height*/ 249 32, /*bitmap_pad*/ 250 0 /*bytes_per_line*/ 251 ); 252 assert(img); 253 /* grab the bits/pixel value */ 254 bitsPerPixel = img->bits_per_pixel; 255 /* free the XImage */ 256 _mesa_free( img->data ); 257 img->data = NULL; 258 XMesaDestroyImage( img ); 259 return bitsPerPixel; 260#endif 261} 262 263 264 265/* 266 * Determine if a given X window ID is valid (window exists). 267 * Do this by calling XGetWindowAttributes() for the window and 268 * checking if we catch an X error. 269 * Input: dpy - the display 270 * win - the window to check for existance 271 * Return: GL_TRUE - window exists 272 * GL_FALSE - window doesn't exist 273 */ 274#ifndef XFree86Server 275static GLboolean WindowExistsFlag; 276 277static int window_exists_err_handler( XMesaDisplay* dpy, XErrorEvent* xerr ) 278{ 279 (void) dpy; 280 if (xerr->error_code == BadWindow) { 281 WindowExistsFlag = GL_FALSE; 282 } 283 return 0; 284} 285 286static GLboolean window_exists( XMesaDisplay *dpy, Window win ) 287{ 288 XWindowAttributes wa; 289 int (*old_handler)( XMesaDisplay*, XErrorEvent* ); 290 WindowExistsFlag = GL_TRUE; 291 old_handler = XSetErrorHandler(window_exists_err_handler); 292 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */ 293 XSetErrorHandler(old_handler); 294 return WindowExistsFlag; 295} 296 297static Status 298get_drawable_size( XMesaDisplay *dpy, Drawable d, GLuint *width, GLuint *height ) 299{ 300 Window root; 301 Status stat; 302 int xpos, ypos; 303 unsigned int w, h, bw, depth; 304 stat = XGetGeometry(dpy, d, &root, &xpos, &ypos, &w, &h, &bw, &depth); 305 *width = w; 306 *height = h; 307 return stat; 308} 309#endif 310 311 312/** 313 * Return the size of the window (or pixmap) that corresponds to the 314 * given XMesaBuffer. 315 * \param width returns width in pixels 316 * \param height returns height in pixels 317 */ 318void 319xmesa_get_window_size(XMesaDisplay *dpy, XMesaBuffer b, 320 GLuint *width, GLuint *height) 321{ 322#ifdef XFree86Server 323 *width = MIN2(b->frontxrb->drawable->width, MAX_WIDTH); 324 *height = MIN2(b->frontxrb->drawable->height, MAX_HEIGHT); 325#else 326 Status stat; 327 328 _glthread_LOCK_MUTEX(_xmesa_lock); 329 XSync(b->xm_visual->display, 0); /* added for Chromium */ 330 stat = get_drawable_size(dpy, b->frontxrb->pixmap, width, height); 331 _glthread_UNLOCK_MUTEX(_xmesa_lock); 332 333 if (!stat) { 334 /* probably querying a window that's recently been destroyed */ 335 _mesa_warning(NULL, "XGetGeometry failed!\n"); 336 *width = *height = 1; 337 } 338#endif 339} 340 341 342 343/**********************************************************************/ 344/***** Linked list of XMesaBuffers *****/ 345/**********************************************************************/ 346 347XMesaBuffer XMesaBufferList = NULL; 348 349 350/** 351 * Allocate a new XMesaBuffer object which corresponds to the given drawable. 352 * Note that XMesaBuffer is derived from GLframebuffer. 353 * The new XMesaBuffer will not have any size (Width=Height=0). 354 * 355 * \param d the corresponding X drawable (window or pixmap) 356 * \param type either WINDOW, PIXMAP or PBUFFER, describing d 357 * \param vis the buffer's visual 358 * \param cmap the window's colormap, if known. 359 * \return new XMesaBuffer or NULL if any problem 360 */ 361static XMesaBuffer 362create_xmesa_buffer(XMesaDrawable d, BufferType type, 363 XMesaVisual vis, XMesaColormap cmap) 364{ 365 XMesaBuffer b; 366 367 ASSERT(type == WINDOW || type == PIXMAP || type == PBUFFER); 368 369 b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer); 370 if (!b) 371 return NULL; 372 373 b->display = vis->display; 374 b->xm_visual = vis; 375 b->type = type; 376 b->cmap = cmap; 377 378 _mesa_initialize_framebuffer(&b->mesa_buffer, &vis->mesa_visual); 379 b->mesa_buffer.Delete = xmesa_delete_framebuffer; 380 381 /* 382 * Front renderbuffer 383 */ 384 b->frontxrb = xmesa_new_renderbuffer(NULL, 0, &vis->mesa_visual, GL_FALSE); 385 if (!b->frontxrb) { 386 _mesa_free(b); 387 return NULL; 388 } 389 b->frontxrb->Parent = b; 390 b->frontxrb->drawable = d; 391 b->frontxrb->pixmap = (XMesaPixmap) d; 392 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_FRONT_LEFT, 393 &b->frontxrb->Base); 394 395 /* 396 * Back renderbuffer 397 */ 398 if (vis->mesa_visual.doubleBufferMode) { 399 b->backxrb = xmesa_new_renderbuffer(NULL, 0, &vis->mesa_visual, GL_TRUE); 400 if (!b->backxrb) { 401 /* XXX free front xrb too */ 402 _mesa_free(b); 403 return NULL; 404 } 405 b->backxrb->Parent = b; 406 /* determine back buffer implementation */ 407 b->db_mode = vis->ximage_flag ? BACK_XIMAGE : BACK_PIXMAP; 408 409 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_BACK_LEFT, 410 &b->backxrb->Base); 411 } 412 413 /* 414 * Software alpha planes 415 */ 416 if (vis->mesa_visual.alphaBits > 0 417 && vis->undithered_pf != PF_8A8B8G8R 418 && vis->undithered_pf != PF_8A8R8G8B) { 419 /* Visual has alpha, but pixel format doesn't support it. 420 * We'll use an alpha renderbuffer wrapper. 421 */ 422 b->swAlpha = GL_TRUE; 423 } 424 else { 425 b->swAlpha = GL_FALSE; 426 } 427 428 /* 429 * Other renderbuffer (depth, stencil, etc) 430 */ 431 _mesa_add_soft_renderbuffers(&b->mesa_buffer, 432 GL_FALSE, /* color */ 433 vis->mesa_visual.haveDepthBuffer, 434 vis->mesa_visual.haveStencilBuffer, 435 vis->mesa_visual.haveAccumBuffer, 436 b->swAlpha, 437 vis->mesa_visual.numAuxBuffers > 0 ); 438 439 /* GLX_EXT_texture_from_pixmap */ 440 b->TextureTarget = 0; 441 b->TextureFormat = GLX_TEXTURE_FORMAT_NONE_EXT; 442 b->TextureMipmap = 0; 443 444 /* insert buffer into linked list */ 445 b->Next = XMesaBufferList; 446 XMesaBufferList = b; 447 448 return b; 449} 450 451 452/** 453 * Find an XMesaBuffer by matching X display and colormap but NOT matching 454 * the notThis buffer. 455 */ 456XMesaBuffer 457xmesa_find_buffer(XMesaDisplay *dpy, XMesaColormap cmap, XMesaBuffer notThis) 458{ 459 XMesaBuffer b; 460 for (b=XMesaBufferList; b; b=b->Next) { 461 if (b->display==dpy && b->cmap==cmap && b!=notThis) { 462 return b; 463 } 464 } 465 return NULL; 466} 467 468 469/** 470 * Remove buffer from linked list, delete if no longer referenced. 471 */ 472static void 473xmesa_free_buffer(XMesaBuffer buffer) 474{ 475 XMesaBuffer prev = NULL, b; 476 477 for (b = XMesaBufferList; b; b = b->Next) { 478 if (b == buffer) { 479 struct gl_framebuffer *fb = &buffer->mesa_buffer; 480 481 /* unlink buffer from list */ 482 if (prev) 483 prev->Next = buffer->Next; 484 else 485 XMesaBufferList = buffer->Next; 486 487 /* mark as delete pending */ 488 fb->DeletePending = GL_TRUE; 489 490 /* Since the X window for the XMesaBuffer is going away, we don't 491 * want to dereference this pointer in the future. 492 */ 493 b->frontxrb->drawable = 0; 494 495 /* Unreference. If count = zero we'll really delete the buffer */ 496 _mesa_reference_framebuffer(&fb, NULL); 497 498 return; 499 } 500 /* continue search */ 501 prev = b; 502 } 503 /* buffer not found in XMesaBufferList */ 504 _mesa_problem(NULL,"xmesa_free_buffer() - buffer not found\n"); 505} 506 507 508/** 509 * Copy X color table stuff from one XMesaBuffer to another. 510 */ 511static void 512copy_colortable_info(XMesaBuffer dst, const XMesaBuffer src) 513{ 514 MEMCPY(dst->color_table, src->color_table, sizeof(src->color_table)); 515 MEMCPY(dst->pixel_to_r, src->pixel_to_r, sizeof(src->pixel_to_r)); 516 MEMCPY(dst->pixel_to_g, src->pixel_to_g, sizeof(src->pixel_to_g)); 517 MEMCPY(dst->pixel_to_b, src->pixel_to_b, sizeof(src->pixel_to_b)); 518 dst->num_alloced = src->num_alloced; 519 MEMCPY(dst->alloced_colors, src->alloced_colors, 520 sizeof(src->alloced_colors)); 521} 522 523 524 525/**********************************************************************/ 526/***** Misc Private Functions *****/ 527/**********************************************************************/ 528 529 530/** 531 * A replacement for XAllocColor. This function should never 532 * fail to allocate a color. When XAllocColor fails, we return 533 * the nearest matching color. If we have to allocate many colors 534 * this function isn't too efficient; the XQueryColors() could be 535 * done just once. 536 * Written by Michael Pichler, Brian Paul, Mark Kilgard 537 * Input: dpy - X display 538 * cmap - X colormap 539 * cmapSize - size of colormap 540 * In/Out: color - the XColor struct 541 * Output: exact - 1=exact color match, 0=closest match 542 * alloced - 1=XAlloc worked, 0=XAlloc failed 543 */ 544static void 545noFaultXAllocColor( int client, 546 XMesaDisplay *dpy, 547 XMesaColormap cmap, 548 int cmapSize, 549 XMesaColor *color, 550 int *exact, int *alloced ) 551{ 552#ifdef XFree86Server 553 Pixel *ppixIn; 554 xrgb *ctable; 555#else 556 /* we'll try to cache ctable for better remote display performance */ 557 static Display *prevDisplay = NULL; 558 static XMesaColormap prevCmap = 0; 559 static int prevCmapSize = 0; 560 static XMesaColor *ctable = NULL; 561#endif 562 XMesaColor subColor; 563 int i, bestmatch; 564 double mindist; /* 3*2^16^2 exceeds long int precision. */ 565 566 (void) client; 567 568 /* First try just using XAllocColor. */ 569#ifdef XFree86Server 570 if (AllocColor(cmap, 571 &color->red, &color->green, &color->blue, 572 &color->pixel, 573 client) == Success) 574#else 575 if (XAllocColor(dpy, cmap, color)) 576#endif 577 { 578 *exact = 1; 579 *alloced = 1; 580 return; 581 } 582 583 /* Alloc failed, search for closest match */ 584 585 /* Retrieve color table entries. */ 586 /* XXX alloca candidate. */ 587#ifdef XFree86Server 588 ppixIn = (Pixel *) MALLOC(cmapSize * sizeof(Pixel)); 589 ctable = (xrgb *) MALLOC(cmapSize * sizeof(xrgb)); 590 for (i = 0; i < cmapSize; i++) { 591 ppixIn[i] = i; 592 } 593 QueryColors(cmap, cmapSize, ppixIn, ctable); 594#else 595 if (prevDisplay != dpy || prevCmap != cmap 596 || prevCmapSize != cmapSize || !ctable) { 597 /* free previously cached color table */ 598 if (ctable) 599 _mesa_free(ctable); 600 /* Get the color table from X */ 601 ctable = (XMesaColor *) MALLOC(cmapSize * sizeof(XMesaColor)); 602 assert(ctable); 603 for (i = 0; i < cmapSize; i++) { 604 ctable[i].pixel = i; 605 } 606 XQueryColors(dpy, cmap, ctable, cmapSize); 607 prevDisplay = dpy; 608 prevCmap = cmap; 609 prevCmapSize = cmapSize; 610 } 611#endif 612 613 /* Find best match. */ 614 bestmatch = -1; 615 mindist = 0.0; 616 for (i = 0; i < cmapSize; i++) { 617 double dr = 0.30 * ((double) color->red - (double) ctable[i].red); 618 double dg = 0.59 * ((double) color->green - (double) ctable[i].green); 619 double db = 0.11 * ((double) color->blue - (double) ctable[i].blue); 620 double dist = dr * dr + dg * dg + db * db; 621 if (bestmatch < 0 || dist < mindist) { 622 bestmatch = i; 623 mindist = dist; 624 } 625 } 626 627 /* Return result. */ 628 subColor.red = ctable[bestmatch].red; 629 subColor.green = ctable[bestmatch].green; 630 subColor.blue = ctable[bestmatch].blue; 631 /* Try to allocate the closest match color. This should only 632 * fail if the cell is read/write. Otherwise, we're incrementing 633 * the cell's reference count. 634 */ 635#ifdef XFree86Server 636 if (AllocColor(cmap, 637 &subColor.red, &subColor.green, &subColor.blue, 638 &subColor.pixel, 639 client) == Success) { 640#else 641 if (XAllocColor(dpy, cmap, &subColor)) { 642#endif 643 *alloced = 1; 644 } 645 else { 646 /* do this to work around a problem reported by Frank Ortega */ 647 subColor.pixel = (unsigned long) bestmatch; 648 subColor.red = ctable[bestmatch].red; 649 subColor.green = ctable[bestmatch].green; 650 subColor.blue = ctable[bestmatch].blue; 651 subColor.flags = DoRed | DoGreen | DoBlue; 652 *alloced = 0; 653 } 654#ifdef XFree86Server 655 _mesa_free(ppixIn); 656 _mesa_free(ctable); 657#else 658 /* don't free table, save it for next time */ 659#endif 660 661 *color = subColor; 662 *exact = 0; 663} 664 665 666 667/** 668 * Do setup for PF_GRAYSCALE pixel format. 669 * Note that buffer may be NULL. 670 */ 671static GLboolean 672setup_grayscale(int client, XMesaVisual v, 673 XMesaBuffer buffer, XMesaColormap cmap) 674{ 675 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 676 return GL_FALSE; 677 } 678 679 if (buffer) { 680 XMesaBuffer prevBuffer; 681 682 if (!cmap) { 683 return GL_FALSE; 684 } 685 686 prevBuffer = xmesa_find_buffer(v->display, cmap, buffer); 687 if (prevBuffer && 688 (buffer->xm_visual->mesa_visual.rgbMode == 689 prevBuffer->xm_visual->mesa_visual.rgbMode)) { 690 /* Copy colormap stuff from previous XMesaBuffer which uses same 691 * X colormap. Do this to avoid time spent in noFaultXAllocColor. 692 */ 693 copy_colortable_info(buffer, prevBuffer); 694 } 695 else { 696 /* Allocate 256 shades of gray */ 697 int gray; 698 int colorsfailed = 0; 699 for (gray=0;gray<256;gray++) { 700 GLint r = gamma_adjust( v->RedGamma, gray, 255 ); 701 GLint g = gamma_adjust( v->GreenGamma, gray, 255 ); 702 GLint b = gamma_adjust( v->BlueGamma, gray, 255 ); 703 int exact, alloced; 704 XMesaColor xcol; 705 xcol.red = (r << 8) | r; 706 xcol.green = (g << 8) | g; 707 xcol.blue = (b << 8) | b; 708 noFaultXAllocColor( client, v->display, 709 cmap, GET_COLORMAP_SIZE(v), 710 &xcol, &exact, &alloced ); 711 if (!exact) { 712 colorsfailed++; 713 } 714 if (alloced) { 715 assert(buffer->num_alloced<256); 716 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 717 buffer->num_alloced++; 718 } 719 720 /*OLD 721 assert(gray < 576); 722 buffer->color_table[gray*3+0] = xcol.pixel; 723 buffer->color_table[gray*3+1] = xcol.pixel; 724 buffer->color_table[gray*3+2] = xcol.pixel; 725 assert(xcol.pixel < 65536); 726 buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100; 727 buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100; 728 buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100; 729 */ 730 buffer->color_table[gray] = xcol.pixel; 731 assert(xcol.pixel < 65536); 732 buffer->pixel_to_r[xcol.pixel] = gray; 733 buffer->pixel_to_g[xcol.pixel] = gray; 734 buffer->pixel_to_b[xcol.pixel] = gray; 735 } 736 737 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { 738 _mesa_warning(NULL, 739 "Note: %d out of 256 needed colors do not match exactly.\n", 740 colorsfailed ); 741 } 742 } 743 } 744 745 v->dithered_pf = PF_Grayscale; 746 v->undithered_pf = PF_Grayscale; 747 return GL_TRUE; 748} 749 750 751 752/** 753 * Setup RGB rendering for a window with a PseudoColor, StaticColor, 754 * or 8-bit TrueColor visual visual. We try to allocate a palette of 225 755 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB 756 * color. While this function was originally designed just for 8-bit 757 * visuals, it has also proven to work from 4-bit up to 16-bit visuals. 758 * Dithering code contributed by Bob Mercier. 759 */ 760static GLboolean 761setup_dithered_color(int client, XMesaVisual v, 762 XMesaBuffer buffer, XMesaColormap cmap) 763{ 764 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 765 return GL_FALSE; 766 } 767 768 if (buffer) { 769 XMesaBuffer prevBuffer; 770 771 if (!cmap) { 772 return GL_FALSE; 773 } 774 775 prevBuffer = xmesa_find_buffer(v->display, cmap, buffer); 776 if (prevBuffer && 777 (buffer->xm_visual->mesa_visual.rgbMode == 778 prevBuffer->xm_visual->mesa_visual.rgbMode)) { 779 /* Copy colormap stuff from previous, matching XMesaBuffer. 780 * Do this to avoid time spent in noFaultXAllocColor. 781 */ 782 copy_colortable_info(buffer, prevBuffer); 783 } 784 else { 785 /* Allocate X colors and initialize color_table[], red_table[], etc */ 786 int r, g, b, i; 787 int colorsfailed = 0; 788 for (r = 0; r < DITH_R; r++) { 789 for (g = 0; g < DITH_G; g++) { 790 for (b = 0; b < DITH_B; b++) { 791 XMesaColor xcol; 792 int exact, alloced; 793 xcol.red =gamma_adjust(v->RedGamma, r*65535/(DITH_R-1),65535); 794 xcol.green=gamma_adjust(v->GreenGamma, g*65535/(DITH_G-1),65535); 795 xcol.blue =gamma_adjust(v->BlueGamma, b*65535/(DITH_B-1),65535); 796 noFaultXAllocColor( client, v->display, 797 cmap, GET_COLORMAP_SIZE(v), 798 &xcol, &exact, &alloced ); 799 if (!exact) { 800 colorsfailed++; 801 } 802 if (alloced) { 803 assert(buffer->num_alloced<256); 804 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 805 buffer->num_alloced++; 806 } 807 i = DITH_MIX( r, g, b ); 808 assert(i < 576); 809 buffer->color_table[i] = xcol.pixel; 810 assert(xcol.pixel < 65536); 811 buffer->pixel_to_r[xcol.pixel] = r * 255 / (DITH_R-1); 812 buffer->pixel_to_g[xcol.pixel] = g * 255 / (DITH_G-1); 813 buffer->pixel_to_b[xcol.pixel] = b * 255 / (DITH_B-1); 814 } 815 } 816 } 817 818 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { 819 _mesa_warning(NULL, 820 "Note: %d out of %d needed colors do not match exactly.\n", 821 colorsfailed, DITH_R * DITH_G * DITH_B ); 822 } 823 } 824 } 825 826 v->dithered_pf = PF_Dither; 827 v->undithered_pf = PF_Lookup; 828 return GL_TRUE; 829} 830 831 832/** 833 * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode. 834 * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer. 835 * Special dithering tables have to be initialized. 836 */ 837static void 838setup_8bit_hpcr(XMesaVisual v) 839{ 840 /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be) 841 * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined 842 * on the root window AND the colormap obtainable by XGetRGBColormaps 843 * for that atom must be set on the window. (see also tkInitWindow) 844 * If that colormap is not set, the output will look stripy. 845 */ 846 847 /* Setup color tables with gamma correction */ 848 int i; 849 double g; 850 851 g = 1.0 / v->RedGamma; 852 for (i=0; i<256; i++) { 853 GLint red = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[0][i]/255.0, g )); 854 v->hpcr_rgbTbl[0][i] = CLAMP( red, 16, 239 ); 855 } 856 857 g = 1.0 / v->GreenGamma; 858 for (i=0; i<256; i++) { 859 GLint green = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[1][i]/255.0, g )); 860 v->hpcr_rgbTbl[1][i] = CLAMP( green, 16, 239 ); 861 } 862 863 g = 1.0 / v->BlueGamma; 864 for (i=0; i<256; i++) { 865 GLint blue = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[2][i]/255.0, g )); 866 v->hpcr_rgbTbl[2][i] = CLAMP( blue, 32, 223 ); 867 } 868 v->undithered_pf = PF_HPCR; /* can't really disable dithering for now */ 869 v->dithered_pf = PF_HPCR; 870 871 /* which method should I use to clear */ 872 /* GL_FALSE: keep the ordinary method */ 873 /* GL_TRUE : clear with dither pattern */ 874 v->hpcr_clear_flag = _mesa_getenv("MESA_HPCR_CLEAR") ? GL_TRUE : GL_FALSE; 875 876 if (v->hpcr_clear_flag) { 877 v->hpcr_clear_pixmap = XMesaCreatePixmap(v->display, 878 DefaultRootWindow(v->display), 879 16, 2, 8); 880#ifndef XFree86Server 881 v->hpcr_clear_ximage = XGetImage(v->display, v->hpcr_clear_pixmap, 882 0, 0, 16, 2, AllPlanes, ZPixmap); 883#endif 884 } 885} 886 887 888/** 889 * Setup RGB rendering for a window with a True/DirectColor visual. 890 */ 891static void 892setup_truecolor(XMesaVisual v, XMesaBuffer buffer, XMesaColormap cmap) 893{ 894 unsigned long rmask, gmask, bmask; 895 (void) buffer; 896 (void) cmap; 897 898 /* Compute red multiplier (mask) and bit shift */ 899 v->rshift = 0; 900 rmask = GET_REDMASK(v); 901 while ((rmask & 1)==0) { 902 v->rshift++; 903 rmask = rmask >> 1; 904 } 905 906 /* Compute green multiplier (mask) and bit shift */ 907 v->gshift = 0; 908 gmask = GET_GREENMASK(v); 909 while ((gmask & 1)==0) { 910 v->gshift++; 911 gmask = gmask >> 1; 912 } 913 914 /* Compute blue multiplier (mask) and bit shift */ 915 v->bshift = 0; 916 bmask = GET_BLUEMASK(v); 917 while ((bmask & 1)==0) { 918 v->bshift++; 919 bmask = bmask >> 1; 920 } 921 922 /* 923 * Compute component-to-pixel lookup tables and dithering kernel 924 */ 925 { 926 static GLubyte kernel[16] = { 927 0*16, 8*16, 2*16, 10*16, 928 12*16, 4*16, 14*16, 6*16, 929 3*16, 11*16, 1*16, 9*16, 930 15*16, 7*16, 13*16, 5*16, 931 }; 932 GLint rBits = _mesa_bitcount(rmask); 933 GLint gBits = _mesa_bitcount(gmask); 934 GLint bBits = _mesa_bitcount(bmask); 935 GLint maxBits; 936 GLuint i; 937 938 /* convert pixel components in [0,_mask] to RGB values in [0,255] */ 939 for (i=0; i<=rmask; i++) 940 v->PixelToR[i] = (unsigned char) ((i * 255) / rmask); 941 for (i=0; i<=gmask; i++) 942 v->PixelToG[i] = (unsigned char) ((i * 255) / gmask); 943 for (i=0; i<=bmask; i++) 944 v->PixelToB[i] = (unsigned char) ((i * 255) / bmask); 945 946 /* convert RGB values from [0,255] to pixel components */ 947 948 for (i=0;i<256;i++) { 949 GLint r = gamma_adjust(v->RedGamma, i, 255); 950 GLint g = gamma_adjust(v->GreenGamma, i, 255); 951 GLint b = gamma_adjust(v->BlueGamma, i, 255); 952 v->RtoPixel[i] = (r >> (8-rBits)) << v->rshift; 953 v->GtoPixel[i] = (g >> (8-gBits)) << v->gshift; 954 v->BtoPixel[i] = (b >> (8-bBits)) << v->bshift; 955 } 956 /* overflow protection */ 957 for (i=256;i<512;i++) { 958 v->RtoPixel[i] = v->RtoPixel[255]; 959 v->GtoPixel[i] = v->GtoPixel[255]; 960 v->BtoPixel[i] = v->BtoPixel[255]; 961 } 962 963 /* setup dithering kernel */ 964 maxBits = rBits; 965 if (gBits > maxBits) maxBits = gBits; 966 if (bBits > maxBits) maxBits = bBits; 967 for (i=0;i<16;i++) { 968 v->Kernel[i] = kernel[i] >> maxBits; 969 } 970 971 v->undithered_pf = PF_Truecolor; 972 v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_Dither_True : PF_Truecolor; 973 } 974 975 /* 976 * Now check for TrueColor visuals which we can optimize. 977 */ 978 if ( GET_REDMASK(v) ==0x0000ff 979 && GET_GREENMASK(v)==0x00ff00 980 && GET_BLUEMASK(v) ==0xff0000 981 && CHECK_BYTE_ORDER(v) 982 && v->BitsPerPixel==32 983 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 984 /* common 32 bpp config used on SGI, Sun */ 985 v->undithered_pf = v->dithered_pf = PF_8A8B8G8R; /* ABGR */ 986 } 987 else if (GET_REDMASK(v) == 0xff0000 988 && GET_GREENMASK(v)== 0x00ff00 989 && GET_BLUEMASK(v) == 0x0000ff 990 && CHECK_BYTE_ORDER(v) 991 && v->RedGamma == 1.0 && v->GreenGamma == 1.0 && v->BlueGamma == 1.0){ 992 if (v->BitsPerPixel==32) { 993 /* if 32 bpp, and visual indicates 8 bpp alpha channel */ 994 if (GET_VISUAL_DEPTH(v) == 32 && v->mesa_visual.alphaBits == 8) 995 v->undithered_pf = v->dithered_pf = PF_8A8R8G8B; /* ARGB */ 996 else 997 v->undithered_pf = v->dithered_pf = PF_8R8G8B; /* xRGB */ 998 } 999 else if (v->BitsPerPixel == 24) { 1000 v->undithered_pf = v->dithered_pf = PF_8R8G8B24; /* RGB */ 1001 } 1002 } 1003 else if (GET_REDMASK(v) ==0xf800 1004 && GET_GREENMASK(v)==0x07e0 1005 && GET_BLUEMASK(v) ==0x001f 1006 && CHECK_BYTE_ORDER(v) 1007 && v->BitsPerPixel==16 1008 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1009 /* 5-6-5 RGB */ 1010 v->undithered_pf = PF_5R6G5B; 1011 v->dithered_pf = PF_Dither_5R6G5B; 1012 } 1013 else if (GET_REDMASK(v) ==0xe0 1014 && GET_GREENMASK(v)==0x1c 1015 && GET_BLUEMASK(v) ==0x03 1016 && CHECK_FOR_HPCR(v)) { 1017 /* 8-bit HP color recovery */ 1018 setup_8bit_hpcr( v ); 1019 } 1020} 1021 1022 1023 1024/** 1025 * Setup RGB rendering for a window with a monochrome visual. 1026 */ 1027static void 1028setup_monochrome( XMesaVisual v, XMesaBuffer b ) 1029{ 1030 (void) b; 1031 v->dithered_pf = v->undithered_pf = PF_1Bit; 1032 /* if black=1 then we must flip pixel values */ 1033 v->bitFlip = (GET_BLACK_PIXEL(v) != 0); 1034} 1035 1036 1037 1038/** 1039 * When a context is bound for the first time, we can finally finish 1040 * initializing the context's visual and buffer information. 1041 * \param v the XMesaVisual to initialize 1042 * \param b the XMesaBuffer to initialize (may be NULL) 1043 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode 1044 * \param window the window/pixmap we're rendering into 1045 * \param cmap the colormap associated with the window/pixmap 1046 * \return GL_TRUE=success, GL_FALSE=failure 1047 */ 1048static GLboolean 1049initialize_visual_and_buffer(XMesaVisual v, XMesaBuffer b, 1050 GLboolean rgb_flag, XMesaDrawable window, 1051 XMesaColormap cmap) 1052{ 1053 int client = 0; 1054 1055#ifdef XFree86Server 1056 client = (window) ? CLIENT_ID(window->id) : 0; 1057#endif 1058 1059 ASSERT(!b || b->xm_visual == v); 1060 1061 /* Save true bits/pixel */ 1062 v->BitsPerPixel = bits_per_pixel(v); 1063 assert(v->BitsPerPixel > 0); 1064 1065 if (rgb_flag == GL_FALSE) { 1066 /* COLOR-INDEXED WINDOW: 1067 * Even if the visual is TrueColor or DirectColor we treat it as 1068 * being color indexed. This is weird but might be useful to someone. 1069 */ 1070 v->dithered_pf = v->undithered_pf = PF_Index; 1071 v->mesa_visual.indexBits = GET_VISUAL_DEPTH(v); 1072 } 1073 else { 1074 /* RGB WINDOW: 1075 * We support RGB rendering into almost any kind of visual. 1076 */ 1077 const int xclass = v->mesa_visual.visualType; 1078 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { 1079 setup_truecolor( v, b, cmap ); 1080 } 1081 else if (xclass == GLX_STATIC_GRAY && GET_VISUAL_DEPTH(v) == 1) { 1082 setup_monochrome( v, b ); 1083 } 1084 else if (xclass == GLX_GRAY_SCALE || xclass == GLX_STATIC_GRAY) { 1085 if (!setup_grayscale( client, v, b, cmap )) { 1086 return GL_FALSE; 1087 } 1088 } 1089 else if ((xclass == GLX_PSEUDO_COLOR || xclass == GLX_STATIC_COLOR) 1090 && GET_VISUAL_DEPTH(v)>=4 && GET_VISUAL_DEPTH(v)<=16) { 1091 if (!setup_dithered_color( client, v, b, cmap )) { 1092 return GL_FALSE; 1093 } 1094 } 1095 else { 1096 _mesa_warning(NULL, "XMesa: RGB mode rendering not supported in given visual.\n"); 1097 return GL_FALSE; 1098 } 1099 v->mesa_visual.indexBits = 0; 1100 1101 if (_mesa_getenv("MESA_NO_DITHER")) { 1102 v->dithered_pf = v->undithered_pf; 1103 } 1104 } 1105 1106 1107 /* 1108 * If MESA_INFO env var is set print out some debugging info 1109 * which can help Brian figure out what's going on when a user 1110 * reports bugs. 1111 */ 1112 if (_mesa_getenv("MESA_INFO")) { 1113 _mesa_printf("X/Mesa visual = %p\n", (void *) v); 1114 _mesa_printf("X/Mesa dithered pf = %u\n", v->dithered_pf); 1115 _mesa_printf("X/Mesa undithered pf = %u\n", v->undithered_pf); 1116 _mesa_printf("X/Mesa level = %d\n", v->mesa_visual.level); 1117 _mesa_printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v)); 1118 _mesa_printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel); 1119 } 1120 1121 if (b && window) { 1122 char *data; 1123 1124 /* Do window-specific initializations */ 1125 1126 /* these should have been set in create_xmesa_buffer */ 1127 ASSERT(b->frontxrb->drawable == window); 1128 ASSERT(b->frontxrb->pixmap == (XMesaPixmap) window); 1129 1130 /* Setup for single/double buffering */ 1131 if (v->mesa_visual.doubleBufferMode) { 1132 /* Double buffered */ 1133 b->shm = check_for_xshm( v->display ); 1134 } 1135 1136 /* X11 graphics contexts */ 1137#ifdef XFree86Server 1138 b->gc = CreateScratchGC(v->display, window->depth); 1139#else 1140 b->gc = XCreateGC( v->display, window, 0, NULL ); 1141#endif 1142 XMesaSetFunction( v->display, b->gc, GXcopy ); 1143 1144 /* cleargc - for glClear() */ 1145#ifdef XFree86Server 1146 b->cleargc = CreateScratchGC(v->display, window->depth); 1147#else 1148 b->cleargc = XCreateGC( v->display, window, 0, NULL ); 1149#endif 1150 XMesaSetFunction( v->display, b->cleargc, GXcopy ); 1151 1152 /* 1153 * Don't generate Graphics Expose/NoExpose events in swapbuffers(). 1154 * Patch contributed by Michael Pichler May 15, 1995. 1155 */ 1156#ifdef XFree86Server 1157 b->swapgc = CreateScratchGC(v->display, window->depth); 1158 { 1159 CARD32 v[1]; 1160 v[0] = FALSE; 1161 dixChangeGC(NullClient, b->swapgc, GCGraphicsExposures, v, NULL); 1162 } 1163#else 1164 { 1165 XGCValues gcvalues; 1166 gcvalues.graphics_exposures = False; 1167 b->swapgc = XCreateGC(v->display, window, 1168 GCGraphicsExposures, &gcvalues); 1169 } 1170#endif 1171 XMesaSetFunction( v->display, b->swapgc, GXcopy ); 1172 /* 1173 * Set fill style and tile pixmap once for all for HPCR stuff 1174 * (instead of doing it each time in clear_color_HPCR_pixmap()) 1175 * Initialize whole stuff 1176 * Patch contributed by Jacques Leroy March 8, 1998. 1177 */ 1178 if (v->hpcr_clear_flag && b->backxrb && b->backxrb->pixmap) { 1179 int i; 1180 for (i = 0; i < 16; i++) { 1181 XMesaPutPixel(v->hpcr_clear_ximage, i, 0, 0); 1182 XMesaPutPixel(v->hpcr_clear_ximage, i, 1, 0); 1183 } 1184 XMesaPutImage(b->display, (XMesaDrawable) v->hpcr_clear_pixmap, 1185 b->cleargc, v->hpcr_clear_ximage, 0, 0, 0, 0, 16, 2); 1186 XMesaSetFillStyle( v->display, b->cleargc, FillTiled); 1187 XMesaSetTile( v->display, b->cleargc, v->hpcr_clear_pixmap ); 1188 } 1189 1190 /* Initialize the row buffer XImage for use in write_color_span() */ 1191 data = (char*) MALLOC(MAX_WIDTH*4); 1192#ifdef XFree86Server 1193 b->rowimage = XMesaCreateImage(GET_VISUAL_DEPTH(v), MAX_WIDTH, 1, data); 1194#else 1195 b->rowimage = XCreateImage( v->display, 1196 v->visinfo->visual, 1197 v->visinfo->depth, 1198 ZPixmap, 0, /*format, offset*/ 1199 data, /*data*/ 1200 MAX_WIDTH, 1, /*width, height*/ 1201 32, /*bitmap_pad*/ 1202 0 /*bytes_per_line*/ ); 1203#endif 1204 if (!b->rowimage) 1205 return GL_FALSE; 1206 } 1207 1208 return GL_TRUE; 1209} 1210 1211 1212 1213/* 1214 * Convert an RGBA color to a pixel value. 1215 */ 1216unsigned long 1217xmesa_color_to_pixel(GLcontext *ctx, 1218 GLubyte r, GLubyte g, GLubyte b, GLubyte a, 1219 GLuint pixelFormat) 1220{ 1221 XMesaContext xmesa = XMESA_CONTEXT(ctx); 1222 switch (pixelFormat) { 1223 case PF_Index: 1224 return 0; 1225 case PF_Truecolor: 1226 { 1227 unsigned long p; 1228 PACK_TRUECOLOR( p, r, g, b ); 1229 return p; 1230 } 1231 case PF_8A8B8G8R: 1232 return PACK_8A8B8G8R( r, g, b, a ); 1233 case PF_8A8R8G8B: 1234 return PACK_8A8R8G8B( r, g, b, a ); 1235 case PF_8R8G8B: 1236 /* fall through */ 1237 case PF_8R8G8B24: 1238 return PACK_8R8G8B( r, g, b ); 1239 case PF_5R6G5B: 1240 return PACK_5R6G5B( r, g, b ); 1241 case PF_Dither: 1242 { 1243 DITHER_SETUP; 1244 return DITHER( 1, 0, r, g, b ); 1245 } 1246 case PF_1Bit: 1247 /* 382 = (3*255)/2 */ 1248 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 1249 case PF_HPCR: 1250 return DITHER_HPCR(1, 1, r, g, b); 1251 case PF_Lookup: 1252 { 1253 LOOKUP_SETUP; 1254 return LOOKUP( r, g, b ); 1255 } 1256 case PF_Grayscale: 1257 return GRAY_RGB( r, g, b ); 1258 case PF_Dither_True: 1259 /* fall through */ 1260 case PF_Dither_5R6G5B: 1261 { 1262 unsigned long p; 1263 PACK_TRUEDITHER(p, 1, 0, r, g, b); 1264 return p; 1265 } 1266 default: 1267 _mesa_problem(ctx, "Bad pixel format in xmesa_color_to_pixel"); 1268 } 1269 return 0; 1270} 1271 1272 1273#define NUM_VISUAL_TYPES 6 1274 1275/** 1276 * Convert an X visual type to a GLX visual type. 1277 * 1278 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.) 1279 * to be converted. 1280 * \return If \c visualType is a valid X visual type, a GLX visual type will 1281 * be returned. Otherwise \c GLX_NONE will be returned. 1282 * 1283 * \note 1284 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the 1285 * DRI CVS tree. 1286 */ 1287static GLint 1288xmesa_convert_from_x_visual_type( int visualType ) 1289{ 1290 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = { 1291 GLX_STATIC_GRAY, GLX_GRAY_SCALE, 1292 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR, 1293 GLX_TRUE_COLOR, GLX_DIRECT_COLOR 1294 }; 1295 1296 return ( (unsigned) visualType < NUM_VISUAL_TYPES ) 1297 ? glx_visual_types[ visualType ] : GLX_NONE; 1298} 1299 1300 1301/**********************************************************************/ 1302/***** Public Functions *****/ 1303/**********************************************************************/ 1304 1305 1306#ifdef IN_DRI_DRIVER 1307#define need_GL_VERSION_1_3 1308#define need_GL_VERSION_1_4 1309#define need_GL_VERSION_1_5 1310#define need_GL_VERSION_2_0 1311 1312/* sw extensions for imaging */ 1313#define need_GL_EXT_blend_color 1314#define need_GL_EXT_blend_minmax 1315#define need_GL_EXT_convolution 1316#define need_GL_EXT_histogram 1317#define need_GL_SGI_color_table 1318 1319/* sw extensions not associated with some GL version */ 1320#define need_GL_ARB_shader_objects 1321#define need_GL_ARB_sync 1322#define need_GL_ARB_vertex_program 1323#define need_GL_APPLE_vertex_array_object 1324#define need_GL_ATI_fragment_shader 1325#define need_GL_EXT_depth_bounds_test 1326#define need_GL_EXT_framebuffer_object 1327#define need_GL_EXT_framebuffer_blit 1328#define need_GL_EXT_gpu_program_parameters 1329#define need_GL_EXT_paletted_texture 1330#define need_GL_MESA_resize_buffers 1331#define need_GL_NV_vertex_program 1332#define need_GL_NV_fragment_program 1333 1334#include "extension_helper.h" 1335#include "utils.h" 1336 1337const struct dri_extension card_extensions[] = 1338{ 1339 { "GL_VERSION_1_3", GL_VERSION_1_3_functions }, 1340 { "GL_VERSION_1_4", GL_VERSION_1_4_functions }, 1341 { "GL_VERSION_1_5", GL_VERSION_1_5_functions }, 1342 { "GL_VERSION_2_0", GL_VERSION_2_0_functions }, 1343 1344 { "GL_EXT_blend_color", GL_EXT_blend_color_functions }, 1345 { "GL_EXT_blend_minmax", GL_EXT_blend_minmax_functions }, 1346 { "GL_EXT_convolution", GL_EXT_convolution_functions }, 1347 { "GL_EXT_histogram", GL_EXT_histogram_functions }, 1348 { "GL_SGI_color_table", GL_SGI_color_table_functions }, 1349 1350 { "GL_ARB_depth_clamp", NULL }, 1351 { "GL_ARB_shader_objects", GL_ARB_shader_objects_functions }, 1352 { "GL_ARB_sync", GL_ARB_sync_functions }, 1353 { "GL_ARB_vertex_program", GL_ARB_vertex_program_functions }, 1354 { "GL_APPLE_vertex_array_object", GL_APPLE_vertex_array_object_functions }, 1355 { "GL_ATI_fragment_shader", GL_ATI_fragment_shader_functions }, 1356 { "GL_EXT_depth_bounds_test", GL_EXT_depth_bounds_test_functions }, 1357 { "GL_EXT_framebuffer_object", GL_EXT_framebuffer_object_functions }, 1358 { "GL_EXT_framebuffer_blit", GL_EXT_framebuffer_blit_functions }, 1359 { "GL_EXT_gpu_program_parameters", GL_EXT_gpu_program_parameters_functions }, 1360 { "GL_EXT_paletted_texture", GL_EXT_paletted_texture_functions }, 1361 { "GL_MESA_resize_buffers", GL_MESA_resize_buffers_functions }, 1362 { "GL_NV_depth_clamp", NULL }, 1363 { "GL_NV_vertex_program", GL_NV_vertex_program_functions }, 1364 { "GL_NV_fragment_program", GL_NV_fragment_program_functions }, 1365 { NULL, NULL } 1366}; 1367#endif 1368 1369/* 1370 * Create a new X/Mesa visual. 1371 * Input: display - X11 display 1372 * visinfo - an XVisualInfo pointer 1373 * rgb_flag - GL_TRUE = RGB mode, 1374 * GL_FALSE = color index mode 1375 * alpha_flag - alpha buffer requested? 1376 * db_flag - GL_TRUE = double-buffered, 1377 * GL_FALSE = single buffered 1378 * stereo_flag - stereo visual? 1379 * ximage_flag - GL_TRUE = use an XImage for back buffer, 1380 * GL_FALSE = use an off-screen pixmap for back buffer 1381 * depth_size - requested bits/depth values, or zero 1382 * stencil_size - requested bits/stencil values, or zero 1383 * accum_red_size - requested bits/red accum values, or zero 1384 * accum_green_size - requested bits/green accum values, or zero 1385 * accum_blue_size - requested bits/blue accum values, or zero 1386 * accum_alpha_size - requested bits/alpha accum values, or zero 1387 * num_samples - number of samples/pixel if multisampling, or zero 1388 * level - visual level, usually 0 1389 * visualCaveat - ala the GLX extension, usually GLX_NONE 1390 * Return; a new XMesaVisual or 0 if error. 1391 */ 1392PUBLIC 1393XMesaVisual XMesaCreateVisual( XMesaDisplay *display, 1394 XMesaVisualInfo visinfo, 1395 GLboolean rgb_flag, 1396 GLboolean alpha_flag, 1397 GLboolean db_flag, 1398 GLboolean stereo_flag, 1399 GLboolean ximage_flag, 1400 GLint depth_size, 1401 GLint stencil_size, 1402 GLint accum_red_size, 1403 GLint accum_green_size, 1404 GLint accum_blue_size, 1405 GLint accum_alpha_size, 1406 GLint num_samples, 1407 GLint level, 1408 GLint visualCaveat ) 1409{ 1410 char *gamma; 1411 XMesaVisual v; 1412 GLint red_bits, green_bits, blue_bits, alpha_bits; 1413 1414#ifdef IN_DRI_DRIVER 1415 /* driInitExtensions() should be called once per screen to setup extension 1416 * indices. There is no need to call it when the context is created since 1417 * XMesa enables mesa sw extensions on its own. 1418 */ 1419 driInitExtensions( NULL, card_extensions, GL_FALSE ); 1420#endif 1421 1422#ifndef XFree86Server 1423 /* For debugging only */ 1424 if (_mesa_getenv("MESA_XSYNC")) { 1425 /* This makes debugging X easier. 1426 * In your debugger, set a breakpoint on _XError to stop when an 1427 * X protocol error is generated. 1428 */ 1429 XSynchronize( display, 1 ); 1430 } 1431#endif 1432 1433 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 1434 if (!v) { 1435 return NULL; 1436 } 1437 1438 v->display = display; 1439 1440 /* Save a copy of the XVisualInfo struct because the user may X_mesa_free() 1441 * the struct but we may need some of the information contained in it 1442 * at a later time. 1443 */ 1444#ifndef XFree86Server 1445 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 1446 if(!v->visinfo) { 1447 _mesa_free(v); 1448 return NULL; 1449 } 1450 MEMCPY(v->visinfo, visinfo, sizeof(*visinfo)); 1451#endif 1452 1453 /* check for MESA_GAMMA environment variable */ 1454 gamma = _mesa_getenv("MESA_GAMMA"); 1455 if (gamma) { 1456 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0; 1457 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma ); 1458 if (v->RedGamma<=0.0) v->RedGamma = 1.0; 1459 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma; 1460 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma; 1461 } 1462 else { 1463 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0; 1464 } 1465 1466 v->ximage_flag = ximage_flag; 1467 1468#ifdef XFree86Server 1469 /* We could calculate these values by ourselves. nplanes is either the sum 1470 * of the red, green, and blue bits or the number index bits. 1471 * ColormapEntries is either (1U << index_bits) or 1472 * (1U << max(redBits, greenBits, blueBits)). 1473 */ 1474 assert(visinfo->nplanes > 0); 1475 v->nplanes = visinfo->nplanes; 1476 v->ColormapEntries = visinfo->ColormapEntries; 1477 1478 v->mesa_visual.redMask = visinfo->redMask; 1479 v->mesa_visual.greenMask = visinfo->greenMask; 1480 v->mesa_visual.blueMask = visinfo->blueMask; 1481 v->mesa_visual.visualID = visinfo->vid; 1482 v->mesa_visual.screen = 0; /* FIXME: What should be done here? */ 1483#else 1484 v->mesa_visual.redMask = visinfo->red_mask; 1485 v->mesa_visual.greenMask = visinfo->green_mask; 1486 v->mesa_visual.blueMask = visinfo->blue_mask; 1487 v->mesa_visual.visualID = visinfo->visualid; 1488 v->mesa_visual.screen = visinfo->screen; 1489#endif 1490 1491#if defined(XFree86Server) || !(defined(__cplusplus) || defined(c_plusplus)) 1492 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->class); 1493#else 1494 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->c_class); 1495#endif 1496 1497 v->mesa_visual.visualRating = visualCaveat; 1498 1499 if (alpha_flag) 1500 v->mesa_visual.alphaBits = 8; 1501 1502 (void) initialize_visual_and_buffer( v, NULL, rgb_flag, 0, 0 ); 1503 1504 { 1505 const int xclass = v->mesa_visual.visualType; 1506 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { 1507 red_bits = _mesa_bitcount(GET_REDMASK(v)); 1508 green_bits = _mesa_bitcount(GET_GREENMASK(v)); 1509 blue_bits = _mesa_bitcount(GET_BLUEMASK(v)); 1510 } 1511 else { 1512 /* this is an approximation */ 1513 int depth; 1514 depth = GET_VISUAL_DEPTH(v); 1515 red_bits = depth / 3; 1516 depth -= red_bits; 1517 green_bits = depth / 2; 1518 depth -= green_bits; 1519 blue_bits = depth; 1520 alpha_bits = 0; 1521 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) ); 1522 } 1523 alpha_bits = v->mesa_visual.alphaBits; 1524 } 1525 1526 _mesa_initialize_visual( &v->mesa_visual, 1527 rgb_flag, db_flag, stereo_flag, 1528 red_bits, green_bits, 1529 blue_bits, alpha_bits, 1530 v->mesa_visual.indexBits, 1531 depth_size, 1532 stencil_size, 1533 accum_red_size, accum_green_size, 1534 accum_blue_size, accum_alpha_size, 1535 0 ); 1536 1537 /* XXX minor hack */ 1538 v->mesa_visual.level = level; 1539 return v; 1540} 1541 1542 1543PUBLIC 1544void XMesaDestroyVisual( XMesaVisual v ) 1545{ 1546#ifndef XFree86Server 1547 _mesa_free(v->visinfo); 1548#endif 1549 _mesa_free(v); 1550} 1551 1552 1553 1554/** 1555 * Create a new XMesaContext. 1556 * \param v the XMesaVisual 1557 * \param share_list another XMesaContext with which to share display 1558 * lists or NULL if no sharing is wanted. 1559 * \return an XMesaContext or NULL if error. 1560 */ 1561PUBLIC 1562XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) 1563{ 1564 static GLboolean firstTime = GL_TRUE; 1565 XMesaContext c; 1566 GLcontext *mesaCtx; 1567 struct dd_function_table functions; 1568 TNLcontext *tnl; 1569 1570 if (firstTime) { 1571 _glthread_INIT_MUTEX(_xmesa_lock); 1572 firstTime = GL_FALSE; 1573 } 1574 1575 /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */ 1576 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 1577 if (!c) 1578 return NULL; 1579 1580 mesaCtx = &(c->mesa); 1581 1582 /* initialize with default driver functions, then plug in XMesa funcs */ 1583 _mesa_init_driver_functions(&functions); 1584 xmesa_init_driver_functions(v, &functions); 1585 if (!_mesa_initialize_context(mesaCtx, &v->mesa_visual, 1586 share_list ? &(share_list->mesa) : (GLcontext *) NULL, 1587 &functions, (void *) c)) { 1588 _mesa_free(c); 1589 return NULL; 1590 } 1591 1592 /* Enable this to exercise fixed function -> shader translation 1593 * with software rendering. 1594 */ 1595 if (0) { 1596 mesaCtx->VertexProgram._MaintainTnlProgram = GL_TRUE; 1597 mesaCtx->FragmentProgram._MaintainTexEnvProgram = GL_TRUE; 1598 } 1599 1600 _mesa_enable_sw_extensions(mesaCtx); 1601 _mesa_enable_1_3_extensions(mesaCtx); 1602 _mesa_enable_1_4_extensions(mesaCtx); 1603 _mesa_enable_1_5_extensions(mesaCtx); 1604 _mesa_enable_2_0_extensions(mesaCtx); 1605 _mesa_enable_2_1_extensions(mesaCtx); 1606#if ENABLE_EXT_texure_compression_s3tc 1607 if (mesaCtx->Mesa_DXTn) { 1608 _mesa_enable_extension(mesaCtx, "GL_EXT_texture_compression_s3tc"); 1609 _mesa_enable_extension(mesaCtx, "GL_S3_s3tc"); 1610 } 1611 _mesa_enable_extension(mesaCtx, "GL_3DFX_texture_compression_FXT1"); 1612#endif 1613#if ENABLE_EXT_timer_query 1614 _mesa_enable_extension(mesaCtx, "GL_EXT_timer_query"); 1615#endif 1616 1617#ifdef XFree86Server 1618 /* If we're running in the X server, do bounds checking to prevent 1619 * segfaults and server crashes! 1620 */ 1621 mesaCtx->Const.CheckArrayBounds = GL_TRUE; 1622#endif 1623 1624 /* finish up xmesa context initializations */ 1625 c->swapbytes = CHECK_BYTE_ORDER(v) ? GL_FALSE : GL_TRUE; 1626 c->xm_visual = v; 1627 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ 1628 c->display = v->display; 1629 c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */ 1630 1631 /* Initialize the software rasterizer and helper modules. 1632 */ 1633 if (!_swrast_CreateContext( mesaCtx ) || 1634 !_vbo_CreateContext( mesaCtx ) || 1635 !_tnl_CreateContext( mesaCtx ) || 1636 !_swsetup_CreateContext( mesaCtx )) { 1637 _mesa_free_context_data(&c->mesa); 1638 _mesa_free(c); 1639 return NULL; 1640 } 1641 1642 /* tnl setup */ 1643 tnl = TNL_CONTEXT(mesaCtx); 1644 tnl->Driver.RunPipeline = _tnl_run_pipeline; 1645 /* swrast setup */ 1646 xmesa_register_swrast_functions( mesaCtx ); 1647 _swsetup_Wakeup(mesaCtx); 1648 1649 if (TEST_META_FUNCS) 1650 _mesa_meta_init(mesaCtx); 1651 1652 return c; 1653} 1654 1655 1656 1657PUBLIC 1658void XMesaDestroyContext( XMesaContext c ) 1659{ 1660 GLcontext *mesaCtx = &c->mesa; 1661 1662#ifdef FX 1663 FXdestroyContext( XMESA_BUFFER(mesaCtx->DrawBuffer) ); 1664#endif 1665 1666 if (TEST_META_FUNCS) 1667 _mesa_meta_free( mesaCtx ); 1668 1669 _swsetup_DestroyContext( mesaCtx ); 1670 _swrast_DestroyContext( mesaCtx ); 1671 _tnl_DestroyContext( mesaCtx ); 1672 _vbo_DestroyContext( mesaCtx ); 1673 _mesa_free_context_data( mesaCtx ); 1674 _mesa_free( c ); 1675} 1676 1677 1678 1679/** 1680 * Private function for creating an XMesaBuffer which corresponds to an 1681 * X window or pixmap. 1682 * \param v the window's XMesaVisual 1683 * \param w the window we're wrapping 1684 * \return new XMesaBuffer or NULL if error 1685 */ 1686PUBLIC XMesaBuffer 1687XMesaCreateWindowBuffer(XMesaVisual v, XMesaWindow w) 1688{ 1689#ifndef XFree86Server 1690 XWindowAttributes attr; 1691#endif 1692 XMesaBuffer b; 1693 XMesaColormap cmap; 1694 int depth; 1695 1696 assert(v); 1697 assert(w); 1698 1699 /* Check that window depth matches visual depth */ 1700#ifdef XFree86Server 1701 depth = ((XMesaDrawable)w)->depth; 1702#else 1703 XGetWindowAttributes( v->display, w, &attr ); 1704 depth = attr.depth; 1705#endif 1706 if (GET_VISUAL_DEPTH(v) != depth) { 1707 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n", 1708 GET_VISUAL_DEPTH(v), depth); 1709 return NULL; 1710 } 1711 1712 /* Find colormap */ 1713#ifdef XFree86Server 1714 cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP); 1715#else 1716 if (attr.colormap) { 1717 cmap = attr.colormap; 1718 } 1719 else { 1720 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w); 1721 /* this is weird, a window w/out a colormap!? */ 1722 /* OK, let's just allocate a new one and hope for the best */ 1723 cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 1724 } 1725#endif 1726 1727 b = create_xmesa_buffer((XMesaDrawable) w, WINDOW, v, cmap); 1728 if (!b) 1729 return NULL; 1730 1731 if (!initialize_visual_and_buffer( v, b, v->mesa_visual.rgbMode, 1732 (XMesaDrawable) w, cmap )) { 1733 xmesa_free_buffer(b); 1734 return NULL; 1735 } 1736 1737 return b; 1738} 1739 1740 1741 1742/** 1743 * Create a new XMesaBuffer from an X pixmap. 1744 * 1745 * \param v the XMesaVisual 1746 * \param p the pixmap 1747 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or 1748 * \c GLX_DIRECT_COLOR visual for the pixmap 1749 * \returns new XMesaBuffer or NULL if error 1750 */ 1751PUBLIC XMesaBuffer 1752XMesaCreatePixmapBuffer(XMesaVisual v, XMesaPixmap p, XMesaColormap cmap) 1753{ 1754 XMesaBuffer b; 1755 1756 assert(v); 1757 1758 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap); 1759 if (!b) 1760 return NULL; 1761 1762 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 1763 (XMesaDrawable) p, cmap)) { 1764 xmesa_free_buffer(b); 1765 return NULL; 1766 } 1767 1768 return b; 1769} 1770 1771 1772/** 1773 * For GLX_EXT_texture_from_pixmap 1774 */ 1775XMesaBuffer 1776XMesaCreatePixmapTextureBuffer(XMesaVisual v, XMesaPixmap p, 1777 XMesaColormap cmap, 1778 int format, int target, int mipmap) 1779{ 1780 GET_CURRENT_CONTEXT(ctx); 1781 XMesaBuffer b; 1782 GLuint width, height; 1783 1784 assert(v); 1785 1786 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap); 1787 if (!b) 1788 return NULL; 1789 1790 /* get pixmap size, update framebuffer/renderbuffer dims */ 1791 xmesa_get_window_size(v->display, b, &width, &height); 1792 _mesa_resize_framebuffer(NULL, &(b->mesa_buffer), width, height); 1793 1794 if (target == 0) { 1795 /* examine dims */ 1796 if (ctx->Extensions.ARB_texture_non_power_of_two) { 1797 target = GLX_TEXTURE_2D_EXT; 1798 } 1799 else if ( _mesa_bitcount(width) == 1 1800 && _mesa_bitcount(height) == 1) { 1801 /* power of two size */ 1802 if (height == 1) { 1803 target = GLX_TEXTURE_1D_EXT; 1804 } 1805 else { 1806 target = GLX_TEXTURE_2D_EXT; 1807 } 1808 } 1809 else if (ctx->Extensions.NV_texture_rectangle) { 1810 target = GLX_TEXTURE_RECTANGLE_EXT; 1811 } 1812 else { 1813 /* non power of two textures not supported */ 1814 XMesaDestroyBuffer(b); 1815 return 0; 1816 } 1817 } 1818 1819 b->TextureTarget = target; 1820 b->TextureFormat = format; 1821 b->TextureMipmap = mipmap; 1822 1823 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 1824 (XMesaDrawable) p, cmap)) { 1825 xmesa_free_buffer(b); 1826 return NULL; 1827 } 1828 1829 return b; 1830} 1831 1832 1833 1834XMesaBuffer 1835XMesaCreatePBuffer(XMesaVisual v, XMesaColormap cmap, 1836 unsigned int width, unsigned int height) 1837{ 1838#ifndef XFree86Server 1839 XMesaWindow root; 1840 XMesaDrawable drawable; /* X Pixmap Drawable */ 1841 XMesaBuffer b; 1842 1843 /* allocate pixmap for front buffer */ 1844 root = RootWindow( v->display, v->visinfo->screen ); 1845 drawable = XCreatePixmap(v->display, root, width, height, 1846 v->visinfo->depth); 1847 if (!drawable) 1848 return NULL; 1849 1850 b = create_xmesa_buffer(drawable, PBUFFER, v, cmap); 1851 if (!b) 1852 return NULL; 1853 1854 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 1855 drawable, cmap)) { 1856 xmesa_free_buffer(b); 1857 return NULL; 1858 } 1859 1860 return b; 1861#else 1862 return 0; 1863#endif 1864} 1865 1866 1867 1868/* 1869 * Deallocate an XMesaBuffer structure and all related info. 1870 */ 1871PUBLIC void 1872XMesaDestroyBuffer(XMesaBuffer b) 1873{ 1874 xmesa_free_buffer(b); 1875} 1876 1877 1878/** 1879 * Query the current window size and update the corresponding GLframebuffer 1880 * and all attached renderbuffers. 1881 * Called when: 1882 * 1. the first time a buffer is bound to a context. 1883 * 2. from glViewport to poll for window size changes 1884 * 3. from the XMesaResizeBuffers() API function. 1885 * Note: it's possible (and legal) for xmctx to be NULL. That can happen 1886 * when resizing a buffer when no rendering context is bound. 1887 */ 1888void 1889xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer) 1890{ 1891 GLuint width, height; 1892 xmesa_get_window_size(drawBuffer->display, drawBuffer, &width, &height); 1893 if (drawBuffer->mesa_buffer.Width != width || 1894 drawBuffer->mesa_buffer.Height != height) { 1895 GLcontext *ctx = xmctx ? &xmctx->mesa : NULL; 1896 _mesa_resize_framebuffer(ctx, &(drawBuffer->mesa_buffer), width, height); 1897 } 1898 drawBuffer->mesa_buffer.Initialized = GL_TRUE; /* XXX TEMPORARY? */ 1899} 1900 1901 1902/* 1903 * Bind buffer b to context c and make c the current rendering context. 1904 */ 1905GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b ) 1906{ 1907 return XMesaMakeCurrent2( c, b, b ); 1908} 1909 1910 1911/* 1912 * Bind buffer b to context c and make c the current rendering context. 1913 */ 1914PUBLIC 1915GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, 1916 XMesaBuffer readBuffer ) 1917{ 1918 if (c) { 1919 if (!drawBuffer || !readBuffer) 1920 return GL_FALSE; /* must specify buffers! */ 1921 1922 if (&(c->mesa) == _mesa_get_current_context() 1923 && c->mesa.DrawBuffer == &drawBuffer->mesa_buffer 1924 && c->mesa.ReadBuffer == &readBuffer->mesa_buffer 1925 && XMESA_BUFFER(c->mesa.DrawBuffer)->wasCurrent) { 1926 /* same context and buffer, do nothing */ 1927 return GL_TRUE; 1928 } 1929 1930 c->xm_buffer = drawBuffer; 1931 1932#ifdef FX 1933 if (FXmakeCurrent( drawBuffer )) 1934 return GL_TRUE; 1935#endif 1936 1937 /* Call this periodically to detect when the user has begun using 1938 * GL rendering from multiple threads. 1939 */ 1940 _glapi_check_multithread(); 1941 1942 xmesa_check_and_update_buffer_size(c, drawBuffer); 1943 if (readBuffer != drawBuffer) 1944 xmesa_check_and_update_buffer_size(c, readBuffer); 1945 1946 _mesa_make_current(&(c->mesa), 1947 &drawBuffer->mesa_buffer, 1948 &readBuffer->mesa_buffer); 1949 1950 if (c->xm_visual->mesa_visual.rgbMode) { 1951 /* 1952 * Must recompute and set these pixel values because colormap 1953 * can be different for different windows. 1954 */ 1955 c->clearpixel = xmesa_color_to_pixel( &c->mesa, 1956 c->clearcolor[0], 1957 c->clearcolor[1], 1958 c->clearcolor[2], 1959 c->clearcolor[3], 1960 c->xm_visual->undithered_pf); 1961 XMesaSetForeground(c->display, drawBuffer->cleargc, c->clearpixel); 1962 } 1963 1964 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 1965 drawBuffer->wasCurrent = GL_TRUE; 1966 } 1967 else { 1968 /* Detach */ 1969 _mesa_make_current( NULL, NULL, NULL ); 1970 } 1971 return GL_TRUE; 1972} 1973 1974 1975/* 1976 * Unbind the context c from its buffer. 1977 */ 1978GLboolean XMesaUnbindContext( XMesaContext c ) 1979{ 1980 /* A no-op for XFree86 integration purposes */ 1981 return GL_TRUE; 1982} 1983 1984 1985XMesaContext XMesaGetCurrentContext( void ) 1986{ 1987 GET_CURRENT_CONTEXT(ctx); 1988 if (ctx) { 1989 XMesaContext xmesa = XMESA_CONTEXT(ctx); 1990 return xmesa; 1991 } 1992 else { 1993 return 0; 1994 } 1995} 1996 1997 1998XMesaBuffer XMesaGetCurrentBuffer( void ) 1999{ 2000 GET_CURRENT_CONTEXT(ctx); 2001 if (ctx) { 2002 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer); 2003 return xmbuf; 2004 } 2005 else { 2006 return 0; 2007 } 2008} 2009 2010 2011/* New in Mesa 3.1 */ 2012XMesaBuffer XMesaGetCurrentReadBuffer( void ) 2013{ 2014 GET_CURRENT_CONTEXT(ctx); 2015 if (ctx) { 2016 return XMESA_BUFFER(ctx->ReadBuffer); 2017 } 2018 else { 2019 return 0; 2020 } 2021} 2022 2023 2024#ifdef XFree86Server 2025PUBLIC 2026GLboolean XMesaForceCurrent(XMesaContext c) 2027{ 2028 if (c) { 2029 _glapi_set_dispatch(c->mesa.CurrentDispatch); 2030 2031 if (&(c->mesa) != _mesa_get_current_context()) { 2032 _mesa_make_current(&c->mesa, c->mesa.DrawBuffer, c->mesa.ReadBuffer); 2033 } 2034 } 2035 else { 2036 _mesa_make_current(NULL, NULL, NULL); 2037 } 2038 return GL_TRUE; 2039} 2040 2041 2042PUBLIC 2043GLboolean XMesaLoseCurrent(XMesaContext c) 2044{ 2045 (void) c; 2046 _mesa_make_current(NULL, NULL, NULL); 2047 return GL_TRUE; 2048} 2049 2050 2051PUBLIC 2052GLboolean XMesaCopyContext( XMesaContext xm_src, XMesaContext xm_dst, GLuint mask ) 2053{ 2054 _mesa_copy_context(&xm_src->mesa, &xm_dst->mesa, mask); 2055 return GL_TRUE; 2056} 2057#endif /* XFree86Server */ 2058 2059 2060#ifndef FX 2061GLboolean XMesaSetFXmode( GLint mode ) 2062{ 2063 (void) mode; 2064 return GL_FALSE; 2065} 2066#endif 2067 2068 2069 2070/* 2071 * Copy the back buffer to the front buffer. If there's no back buffer 2072 * this is a no-op. 2073 */ 2074PUBLIC 2075void XMesaSwapBuffers( XMesaBuffer b ) 2076{ 2077 GET_CURRENT_CONTEXT(ctx); 2078 2079 if (!b->backxrb) { 2080 /* single buffered */ 2081 return; 2082 } 2083 2084 /* If we're swapping the buffer associated with the current context 2085 * we have to flush any pending rendering commands first. 2086 */ 2087 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2088 _mesa_notifySwapBuffers(ctx); 2089 2090 if (b->db_mode) { 2091#ifdef FX 2092 if (FXswapBuffers(b)) 2093 return; 2094#endif 2095 if (b->backxrb->ximage) { 2096 /* Copy Ximage (back buf) from client memory to server window */ 2097#if defined(USE_XSHM) && !defined(XFree86Server) 2098 if (b->shm) { 2099 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2100 XShmPutImage( 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 False ); 2105 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2106 } 2107 else 2108#endif 2109 { 2110 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2111 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable, 2112 b->swapgc, 2113 b->backxrb->ximage, 0, 0, 2114 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height ); 2115 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2116 } 2117 } 2118 else if (b->backxrb->pixmap) { 2119 /* Copy pixmap (back buf) to window (front buf) on server */ 2120 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2121 XMesaCopyArea( b->xm_visual->display, 2122 b->backxrb->pixmap, /* source drawable */ 2123 b->frontxrb->drawable, /* dest. drawable */ 2124 b->swapgc, 2125 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height, 2126 0, 0 /* dest region */ 2127 ); 2128 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2129 } 2130 2131 if (b->swAlpha) 2132 _mesa_copy_soft_alpha_renderbuffers(ctx, &b->mesa_buffer); 2133 } 2134#if !defined(XFree86Server) 2135 XSync( b->xm_visual->display, False ); 2136#endif 2137} 2138 2139 2140 2141/* 2142 * Copy sub-region of back buffer to front buffer 2143 */ 2144void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 2145{ 2146 GET_CURRENT_CONTEXT(ctx); 2147 2148 /* If we're swapping the buffer associated with the current context 2149 * we have to flush any pending rendering commands first. 2150 */ 2151 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2152 _mesa_notifySwapBuffers(ctx); 2153 2154 if (!b->backxrb) { 2155 /* single buffered */ 2156 return; 2157 } 2158 2159 if (b->db_mode) { 2160 int yTop = b->mesa_buffer.Height - y - height; 2161#ifdef FX 2162 if (FXswapBuffers(b)) 2163 return; 2164#endif 2165 if (b->backxrb->ximage) { 2166 /* Copy Ximage from host's memory to server's window */ 2167#if defined(USE_XSHM) && !defined(XFree86Server) 2168 if (b->shm) { 2169 /* XXX assuming width and height aren't too large! */ 2170 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable, 2171 b->swapgc, 2172 b->backxrb->ximage, x, yTop, 2173 x, yTop, width, height, False ); 2174 /* wait for finished event??? */ 2175 } 2176 else 2177#endif 2178 { 2179 /* XXX assuming width and height aren't too large! */ 2180 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable, 2181 b->swapgc, 2182 b->backxrb->ximage, x, yTop, 2183 x, yTop, width, height ); 2184 } 2185 } 2186 else { 2187 /* Copy pixmap to window on server */ 2188 XMesaCopyArea( b->xm_visual->display, 2189 b->backxrb->pixmap, /* source drawable */ 2190 b->frontxrb->drawable, /* dest. drawable */ 2191 b->swapgc, 2192 x, yTop, width, height, /* source region */ 2193 x, yTop /* dest region */ 2194 ); 2195 } 2196 } 2197} 2198 2199 2200/* 2201 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function 2202 * is a way to get "under the hood" of X/Mesa so one can manipulate the 2203 * back buffer directly. 2204 * Output: pixmap - pointer to back buffer's Pixmap, or 0 2205 * ximage - pointer to back buffer's XImage, or NULL 2206 * Return: GL_TRUE = context is double buffered 2207 * GL_FALSE = context is single buffered 2208 */ 2209#ifndef XFree86Server 2210GLboolean XMesaGetBackBuffer( XMesaBuffer b, 2211 XMesaPixmap *pixmap, 2212 XMesaImage **ximage ) 2213{ 2214 if (b->db_mode) { 2215 if (pixmap) 2216 *pixmap = b->backxrb->pixmap; 2217 if (ximage) 2218 *ximage = b->backxrb->ximage; 2219 return GL_TRUE; 2220 } 2221 else { 2222 *pixmap = 0; 2223 *ximage = NULL; 2224 return GL_FALSE; 2225 } 2226} 2227#endif /* XFree86Server */ 2228 2229 2230/* 2231 * Return the depth buffer associated with an XMesaBuffer. 2232 * Input: b - the XMesa buffer handle 2233 * Output: width, height - size of buffer in pixels 2234 * bytesPerValue - bytes per depth value (2 or 4) 2235 * buffer - pointer to depth buffer values 2236 * Return: GL_TRUE or GL_FALSE to indicate success or failure. 2237 */ 2238GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height, 2239 GLint *bytesPerValue, void **buffer ) 2240{ 2241 struct gl_renderbuffer *rb 2242 = b->mesa_buffer.Attachment[BUFFER_DEPTH].Renderbuffer; 2243 if (!rb || !rb->Data) { 2244 *width = 0; 2245 *height = 0; 2246 *bytesPerValue = 0; 2247 *buffer = 0; 2248 return GL_FALSE; 2249 } 2250 else { 2251 *width = b->mesa_buffer.Width; 2252 *height = b->mesa_buffer.Height; 2253 *bytesPerValue = b->mesa_buffer.Visual.depthBits <= 16 2254 ? sizeof(GLushort) : sizeof(GLuint); 2255 *buffer = rb->Data; 2256 return GL_TRUE; 2257 } 2258} 2259 2260 2261void XMesaFlush( XMesaContext c ) 2262{ 2263 if (c && c->xm_visual) { 2264#ifdef XFree86Server 2265 /* NOT_NEEDED */ 2266#else 2267 XSync( c->xm_visual->display, False ); 2268#endif 2269 } 2270} 2271 2272 2273 2274const char *XMesaGetString( XMesaContext c, int name ) 2275{ 2276 (void) c; 2277 if (name==XMESA_VERSION) { 2278 return "5.0"; 2279 } 2280 else if (name==XMESA_EXTENSIONS) { 2281 return ""; 2282 } 2283 else { 2284 return NULL; 2285 } 2286} 2287 2288 2289 2290XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d ) 2291{ 2292 XMesaBuffer b; 2293 for (b=XMesaBufferList; b; b=b->Next) { 2294 if (b->frontxrb->drawable == d && b->display == dpy) { 2295 return b; 2296 } 2297 } 2298 return NULL; 2299} 2300 2301 2302/** 2303 * Free/destroy all XMesaBuffers associated with given display. 2304 */ 2305void xmesa_destroy_buffers_on_display(XMesaDisplay *dpy) 2306{ 2307 XMesaBuffer b, next; 2308 for (b = XMesaBufferList; b; b = next) { 2309 next = b->Next; 2310 if (b->display == dpy) { 2311 xmesa_free_buffer(b); 2312 } 2313 } 2314} 2315 2316 2317/* 2318 * Look for XMesaBuffers whose X window has been destroyed. 2319 * Deallocate any such XMesaBuffers. 2320 */ 2321void XMesaGarbageCollect( void ) 2322{ 2323 XMesaBuffer b, next; 2324 for (b=XMesaBufferList; b; b=next) { 2325 next = b->Next; 2326 if (b->display && b->frontxrb->drawable && b->type == WINDOW) { 2327#ifdef XFree86Server 2328 /* NOT_NEEDED */ 2329#else 2330 XSync(b->display, False); 2331 if (!window_exists( b->display, b->frontxrb->drawable )) { 2332 /* found a dead window, free the ancillary info */ 2333 XMesaDestroyBuffer( b ); 2334 } 2335#endif 2336 } 2337 } 2338} 2339 2340 2341unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y, 2342 GLfloat red, GLfloat green, 2343 GLfloat blue, GLfloat alpha ) 2344{ 2345 GLcontext *ctx = &xmesa->mesa; 2346 GLint r = (GLint) (red * 255.0F); 2347 GLint g = (GLint) (green * 255.0F); 2348 GLint b = (GLint) (blue * 255.0F); 2349 GLint a = (GLint) (alpha * 255.0F); 2350 2351 switch (xmesa->pixelformat) { 2352 case PF_Index: 2353 return 0; 2354 case PF_Truecolor: 2355 { 2356 unsigned long p; 2357 PACK_TRUECOLOR( p, r, g, b ); 2358 return p; 2359 } 2360 case PF_8A8B8G8R: 2361 return PACK_8A8B8G8R( r, g, b, a ); 2362 case PF_8A8R8G8B: 2363 return PACK_8A8R8G8B( r, g, b, a ); 2364 case PF_8R8G8B: 2365 return PACK_8R8G8B( r, g, b ); 2366 case PF_5R6G5B: 2367 return PACK_5R6G5B( r, g, b ); 2368 case PF_Dither: 2369 { 2370 DITHER_SETUP; 2371 return DITHER( x, y, r, g, b ); 2372 } 2373 case PF_1Bit: 2374 /* 382 = (3*255)/2 */ 2375 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 2376 case PF_HPCR: 2377 return DITHER_HPCR(x, y, r, g, b); 2378 case PF_Lookup: 2379 { 2380 LOOKUP_SETUP; 2381 return LOOKUP( r, g, b ); 2382 } 2383 case PF_Grayscale: 2384 return GRAY_RGB( r, g, b ); 2385 case PF_Dither_5R6G5B: 2386 /* fall through */ 2387 case PF_Dither_True: 2388 { 2389 unsigned long p; 2390 PACK_TRUEDITHER(p, x, y, r, g, b); 2391 return p; 2392 } 2393 default: 2394 _mesa_problem(NULL, "Bad pixel format in XMesaDitherColor"); 2395 } 2396 return 0; 2397} 2398 2399 2400/* 2401 * This is typically called when the window size changes and we need 2402 * to reallocate the buffer's back/depth/stencil/accum buffers. 2403 */ 2404PUBLIC void 2405XMesaResizeBuffers( XMesaBuffer b ) 2406{ 2407 GET_CURRENT_CONTEXT(ctx); 2408 XMesaContext xmctx = XMESA_CONTEXT(ctx); 2409 if (!xmctx) 2410 return; 2411 xmesa_check_and_update_buffer_size(xmctx, b); 2412} 2413 2414 2415static GLint 2416xbuffer_to_renderbuffer(int buffer) 2417{ 2418 assert(MAX_AUX_BUFFERS <= 4); 2419 2420 switch (buffer) { 2421 case GLX_FRONT_LEFT_EXT: 2422 return BUFFER_FRONT_LEFT; 2423 case GLX_FRONT_RIGHT_EXT: 2424 return BUFFER_FRONT_RIGHT; 2425 case GLX_BACK_LEFT_EXT: 2426 return BUFFER_BACK_LEFT; 2427 case GLX_BACK_RIGHT_EXT: 2428 return BUFFER_BACK_RIGHT; 2429 case GLX_AUX0_EXT: 2430 return BUFFER_AUX0; 2431 case GLX_AUX1_EXT: 2432 case GLX_AUX2_EXT: 2433 case GLX_AUX3_EXT: 2434 case GLX_AUX4_EXT: 2435 case GLX_AUX5_EXT: 2436 case GLX_AUX6_EXT: 2437 case GLX_AUX7_EXT: 2438 case GLX_AUX8_EXT: 2439 case GLX_AUX9_EXT: 2440 default: 2441 /* BadValue error */ 2442 return -1; 2443 } 2444} 2445 2446 2447PUBLIC void 2448XMesaBindTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer, 2449 const int *attrib_list) 2450{ 2451#if 0 2452 GET_CURRENT_CONTEXT(ctx); 2453 const GLuint unit = ctx->Texture.CurrentUnit; 2454 struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit]; 2455 struct gl_texture_object *texObj; 2456#endif 2457 struct gl_renderbuffer *rb; 2458 struct xmesa_renderbuffer *xrb; 2459 GLint b; 2460 XMesaImage *img = NULL; 2461 GLboolean freeImg = GL_FALSE; 2462 2463 b = xbuffer_to_renderbuffer(buffer); 2464 if (b < 0) 2465 return; 2466 2467 if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_NONE_EXT) 2468 return; /* BadMatch error */ 2469 2470 rb = drawable->mesa_buffer.Attachment[b].Renderbuffer; 2471 if (!rb) { 2472 /* invalid buffer */ 2473 return; 2474 } 2475 xrb = xmesa_renderbuffer(rb); 2476 2477#if 0 2478 switch (drawable->TextureTarget) { 2479 case GLX_TEXTURE_1D_EXT: 2480 texObj = texUnit->CurrentTex[TEXTURE_1D_INDEX]; 2481 break; 2482 case GLX_TEXTURE_2D_EXT: 2483 texObj = texUnit->CurrentTex[TEXTURE_2D_INDEX]; 2484 break; 2485 case GLX_TEXTURE_RECTANGLE_EXT: 2486 texObj = texUnit->CurrentTex[TEXTURE_RECT_INDEX]; 2487 break; 2488 default: 2489 return; /* BadMatch error */ 2490 } 2491#endif 2492 2493 /* 2494 * The following is a quick and simple way to implement 2495 * BindTexImage. The better way is to write some new FetchTexel() 2496 * functions which would extract texels from XImages. We'd still 2497 * need to use GetImage when texturing from a Pixmap (front buffer) 2498 * but texturing from a back buffer (XImage) would avoid an image 2499 * copy. 2500 */ 2501 2502 /* get XImage */ 2503 if (xrb->pixmap) { 2504 img = XMesaGetImage(dpy, xrb->pixmap, 0, 0, rb->Width, rb->Height, ~0L, 2505 ZPixmap); 2506 freeImg = GL_TRUE; 2507 } 2508 else if (xrb->ximage) { 2509 img = xrb->ximage; 2510 } 2511 2512 /* store the XImage as a new texture image */ 2513 if (img) { 2514 GLenum format, type, intFormat; 2515 if (img->bits_per_pixel == 32) { 2516 format = GL_BGRA; 2517 type = GL_UNSIGNED_BYTE; 2518 intFormat = GL_RGBA; 2519 } 2520 else if (img->bits_per_pixel == 24) { 2521 format = GL_BGR; 2522 type = GL_UNSIGNED_BYTE; 2523 intFormat = GL_RGB; 2524 } 2525 else if (img->bits_per_pixel == 16) { 2526 format = GL_BGR; 2527 type = GL_UNSIGNED_SHORT_5_6_5; 2528 intFormat = GL_RGB; 2529 } 2530 else { 2531 _mesa_problem(NULL, "Unexpected XImage format in XMesaBindTexImage"); 2532 return; 2533 } 2534 if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGBA_EXT) { 2535 intFormat = GL_RGBA; 2536 } 2537 else if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGB_EXT) { 2538 intFormat = GL_RGB; 2539 } 2540 2541 _mesa_TexImage2D(GL_TEXTURE_2D, 0, intFormat, rb->Width, rb->Height, 0, 2542 format, type, img->data); 2543 2544 if (freeImg) { 2545 XMesaDestroyImage(img); 2546 } 2547 } 2548} 2549 2550 2551 2552PUBLIC void 2553XMesaReleaseTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer) 2554{ 2555 const GLint b = xbuffer_to_renderbuffer(buffer); 2556 if (b < 0) 2557 return; 2558 2559 /* no-op for now */ 2560} 2561 2562