xm_api.c revision 705e142dda047f24b563fc2bea0f922173e91d1b
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 * 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 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_window_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 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 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 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 free(ppixIn); 656 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 /* Copy colormap stuff from previous XMesaBuffer which uses same 689 * X colormap. Do this to avoid time spent in noFaultXAllocColor. 690 */ 691 copy_colortable_info(buffer, prevBuffer); 692 } 693 else { 694 /* Allocate 256 shades of gray */ 695 int gray; 696 int colorsfailed = 0; 697 for (gray=0;gray<256;gray++) { 698 GLint r = gamma_adjust( v->RedGamma, gray, 255 ); 699 GLint g = gamma_adjust( v->GreenGamma, gray, 255 ); 700 GLint b = gamma_adjust( v->BlueGamma, gray, 255 ); 701 int exact, alloced; 702 XMesaColor xcol; 703 xcol.red = (r << 8) | r; 704 xcol.green = (g << 8) | g; 705 xcol.blue = (b << 8) | b; 706 noFaultXAllocColor( client, v->display, 707 cmap, GET_COLORMAP_SIZE(v), 708 &xcol, &exact, &alloced ); 709 if (!exact) { 710 colorsfailed++; 711 } 712 if (alloced) { 713 assert(buffer->num_alloced<256); 714 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 715 buffer->num_alloced++; 716 } 717 718 /*OLD 719 assert(gray < 576); 720 buffer->color_table[gray*3+0] = xcol.pixel; 721 buffer->color_table[gray*3+1] = xcol.pixel; 722 buffer->color_table[gray*3+2] = xcol.pixel; 723 assert(xcol.pixel < 65536); 724 buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100; 725 buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100; 726 buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100; 727 */ 728 buffer->color_table[gray] = xcol.pixel; 729 assert(xcol.pixel < 65536); 730 buffer->pixel_to_r[xcol.pixel] = gray; 731 buffer->pixel_to_g[xcol.pixel] = gray; 732 buffer->pixel_to_b[xcol.pixel] = gray; 733 } 734 735 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { 736 _mesa_warning(NULL, 737 "Note: %d out of 256 needed colors do not match exactly.\n", 738 colorsfailed ); 739 } 740 } 741 } 742 743 v->dithered_pf = PF_Grayscale; 744 v->undithered_pf = PF_Grayscale; 745 return GL_TRUE; 746} 747 748 749 750/** 751 * Setup RGB rendering for a window with a PseudoColor, StaticColor, 752 * or 8-bit TrueColor visual visual. We try to allocate a palette of 225 753 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB 754 * color. While this function was originally designed just for 8-bit 755 * visuals, it has also proven to work from 4-bit up to 16-bit visuals. 756 * Dithering code contributed by Bob Mercier. 757 */ 758static GLboolean 759setup_dithered_color(int client, XMesaVisual v, 760 XMesaBuffer buffer, XMesaColormap cmap) 761{ 762 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 763 return GL_FALSE; 764 } 765 766 if (buffer) { 767 XMesaBuffer prevBuffer; 768 769 if (!cmap) { 770 return GL_FALSE; 771 } 772 773 prevBuffer = xmesa_find_buffer(v->display, cmap, buffer); 774 if (prevBuffer) { 775 /* Copy colormap stuff from previous, matching XMesaBuffer. 776 * Do this to avoid time spent in noFaultXAllocColor. 777 */ 778 copy_colortable_info(buffer, prevBuffer); 779 } 780 else { 781 /* Allocate X colors and initialize color_table[], red_table[], etc */ 782 int r, g, b, i; 783 int colorsfailed = 0; 784 for (r = 0; r < DITH_R; r++) { 785 for (g = 0; g < DITH_G; g++) { 786 for (b = 0; b < DITH_B; b++) { 787 XMesaColor xcol; 788 int exact, alloced; 789 xcol.red =gamma_adjust(v->RedGamma, r*65535/(DITH_R-1),65535); 790 xcol.green=gamma_adjust(v->GreenGamma, g*65535/(DITH_G-1),65535); 791 xcol.blue =gamma_adjust(v->BlueGamma, b*65535/(DITH_B-1),65535); 792 noFaultXAllocColor( client, v->display, 793 cmap, GET_COLORMAP_SIZE(v), 794 &xcol, &exact, &alloced ); 795 if (!exact) { 796 colorsfailed++; 797 } 798 if (alloced) { 799 assert(buffer->num_alloced<256); 800 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 801 buffer->num_alloced++; 802 } 803 i = DITH_MIX( r, g, b ); 804 assert(i < 576); 805 buffer->color_table[i] = xcol.pixel; 806 assert(xcol.pixel < 65536); 807 buffer->pixel_to_r[xcol.pixel] = r * 255 / (DITH_R-1); 808 buffer->pixel_to_g[xcol.pixel] = g * 255 / (DITH_G-1); 809 buffer->pixel_to_b[xcol.pixel] = b * 255 / (DITH_B-1); 810 } 811 } 812 } 813 814 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { 815 _mesa_warning(NULL, 816 "Note: %d out of %d needed colors do not match exactly.\n", 817 colorsfailed, DITH_R * DITH_G * DITH_B ); 818 } 819 } 820 } 821 822 v->dithered_pf = PF_Dither; 823 v->undithered_pf = PF_Lookup; 824 return GL_TRUE; 825} 826 827 828/** 829 * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode. 830 * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer. 831 * Special dithering tables have to be initialized. 832 */ 833static void 834setup_8bit_hpcr(XMesaVisual v) 835{ 836 /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be) 837 * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined 838 * on the root window AND the colormap obtainable by XGetRGBColormaps 839 * for that atom must be set on the window. (see also tkInitWindow) 840 * If that colormap is not set, the output will look stripy. 841 */ 842 843 /* Setup color tables with gamma correction */ 844 int i; 845 double g; 846 847 g = 1.0 / v->RedGamma; 848 for (i=0; i<256; i++) { 849 GLint red = IROUND_POS(255.0 * pow( hpcr_rgbTbl[0][i]/255.0, g )); 850 v->hpcr_rgbTbl[0][i] = CLAMP( red, 16, 239 ); 851 } 852 853 g = 1.0 / v->GreenGamma; 854 for (i=0; i<256; i++) { 855 GLint green = IROUND_POS(255.0 * pow( hpcr_rgbTbl[1][i]/255.0, g )); 856 v->hpcr_rgbTbl[1][i] = CLAMP( green, 16, 239 ); 857 } 858 859 g = 1.0 / v->BlueGamma; 860 for (i=0; i<256; i++) { 861 GLint blue = IROUND_POS(255.0 * pow( hpcr_rgbTbl[2][i]/255.0, g )); 862 v->hpcr_rgbTbl[2][i] = CLAMP( blue, 32, 223 ); 863 } 864 v->undithered_pf = PF_HPCR; /* can't really disable dithering for now */ 865 v->dithered_pf = PF_HPCR; 866 867 /* which method should I use to clear */ 868 /* GL_FALSE: keep the ordinary method */ 869 /* GL_TRUE : clear with dither pattern */ 870 v->hpcr_clear_flag = _mesa_getenv("MESA_HPCR_CLEAR") ? GL_TRUE : GL_FALSE; 871 872 if (v->hpcr_clear_flag) { 873 v->hpcr_clear_pixmap = XMesaCreatePixmap(v->display, 874 DefaultRootWindow(v->display), 875 16, 2, 8); 876#ifndef XFree86Server 877 v->hpcr_clear_ximage = XGetImage(v->display, v->hpcr_clear_pixmap, 878 0, 0, 16, 2, AllPlanes, ZPixmap); 879#endif 880 } 881} 882 883 884/** 885 * Setup RGB rendering for a window with a True/DirectColor visual. 886 */ 887static void 888setup_truecolor(XMesaVisual v, XMesaBuffer buffer, XMesaColormap cmap) 889{ 890 unsigned long rmask, gmask, bmask; 891 (void) buffer; 892 (void) cmap; 893 894 /* Compute red multiplier (mask) and bit shift */ 895 v->rshift = 0; 896 rmask = GET_REDMASK(v); 897 while ((rmask & 1)==0) { 898 v->rshift++; 899 rmask = rmask >> 1; 900 } 901 902 /* Compute green multiplier (mask) and bit shift */ 903 v->gshift = 0; 904 gmask = GET_GREENMASK(v); 905 while ((gmask & 1)==0) { 906 v->gshift++; 907 gmask = gmask >> 1; 908 } 909 910 /* Compute blue multiplier (mask) and bit shift */ 911 v->bshift = 0; 912 bmask = GET_BLUEMASK(v); 913 while ((bmask & 1)==0) { 914 v->bshift++; 915 bmask = bmask >> 1; 916 } 917 918 /* 919 * Compute component-to-pixel lookup tables and dithering kernel 920 */ 921 { 922 static GLubyte kernel[16] = { 923 0*16, 8*16, 2*16, 10*16, 924 12*16, 4*16, 14*16, 6*16, 925 3*16, 11*16, 1*16, 9*16, 926 15*16, 7*16, 13*16, 5*16, 927 }; 928 GLint rBits = _mesa_bitcount(rmask); 929 GLint gBits = _mesa_bitcount(gmask); 930 GLint bBits = _mesa_bitcount(bmask); 931 GLint maxBits; 932 GLuint i; 933 934 /* convert pixel components in [0,_mask] to RGB values in [0,255] */ 935 for (i=0; i<=rmask; i++) 936 v->PixelToR[i] = (unsigned char) ((i * 255) / rmask); 937 for (i=0; i<=gmask; i++) 938 v->PixelToG[i] = (unsigned char) ((i * 255) / gmask); 939 for (i=0; i<=bmask; i++) 940 v->PixelToB[i] = (unsigned char) ((i * 255) / bmask); 941 942 /* convert RGB values from [0,255] to pixel components */ 943 944 for (i=0;i<256;i++) { 945 GLint r = gamma_adjust(v->RedGamma, i, 255); 946 GLint g = gamma_adjust(v->GreenGamma, i, 255); 947 GLint b = gamma_adjust(v->BlueGamma, i, 255); 948 v->RtoPixel[i] = (r >> (8-rBits)) << v->rshift; 949 v->GtoPixel[i] = (g >> (8-gBits)) << v->gshift; 950 v->BtoPixel[i] = (b >> (8-bBits)) << v->bshift; 951 } 952 /* overflow protection */ 953 for (i=256;i<512;i++) { 954 v->RtoPixel[i] = v->RtoPixel[255]; 955 v->GtoPixel[i] = v->GtoPixel[255]; 956 v->BtoPixel[i] = v->BtoPixel[255]; 957 } 958 959 /* setup dithering kernel */ 960 maxBits = rBits; 961 if (gBits > maxBits) maxBits = gBits; 962 if (bBits > maxBits) maxBits = bBits; 963 for (i=0;i<16;i++) { 964 v->Kernel[i] = kernel[i] >> maxBits; 965 } 966 967 v->undithered_pf = PF_Truecolor; 968 v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_Dither_True : PF_Truecolor; 969 } 970 971 /* 972 * Now check for TrueColor visuals which we can optimize. 973 */ 974 if ( GET_REDMASK(v) ==0x0000ff 975 && GET_GREENMASK(v)==0x00ff00 976 && GET_BLUEMASK(v) ==0xff0000 977 && CHECK_BYTE_ORDER(v) 978 && v->BitsPerPixel==32 979 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 980 /* common 32 bpp config used on SGI, Sun */ 981 v->undithered_pf = v->dithered_pf = PF_8A8B8G8R; /* ABGR */ 982 } 983 else if (GET_REDMASK(v) == 0xff0000 984 && GET_GREENMASK(v)== 0x00ff00 985 && GET_BLUEMASK(v) == 0x0000ff 986 && CHECK_BYTE_ORDER(v) 987 && v->RedGamma == 1.0 && v->GreenGamma == 1.0 && v->BlueGamma == 1.0){ 988 if (v->BitsPerPixel==32) { 989 /* if 32 bpp, and visual indicates 8 bpp alpha channel */ 990 if (GET_VISUAL_DEPTH(v) == 32 && v->mesa_visual.alphaBits == 8) 991 v->undithered_pf = v->dithered_pf = PF_8A8R8G8B; /* ARGB */ 992 else 993 v->undithered_pf = v->dithered_pf = PF_8R8G8B; /* xRGB */ 994 } 995 else if (v->BitsPerPixel == 24) { 996 v->undithered_pf = v->dithered_pf = PF_8R8G8B24; /* RGB */ 997 } 998 } 999 else if (GET_REDMASK(v) ==0xf800 1000 && GET_GREENMASK(v)==0x07e0 1001 && GET_BLUEMASK(v) ==0x001f 1002 && CHECK_BYTE_ORDER(v) 1003 && v->BitsPerPixel==16 1004 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1005 /* 5-6-5 RGB */ 1006 v->undithered_pf = PF_5R6G5B; 1007 v->dithered_pf = PF_Dither_5R6G5B; 1008 } 1009 else if (GET_REDMASK(v) ==0xe0 1010 && GET_GREENMASK(v)==0x1c 1011 && GET_BLUEMASK(v) ==0x03 1012 && CHECK_FOR_HPCR(v)) { 1013 /* 8-bit HP color recovery */ 1014 setup_8bit_hpcr( v ); 1015 } 1016} 1017 1018 1019 1020/** 1021 * Setup RGB rendering for a window with a monochrome visual. 1022 */ 1023static void 1024setup_monochrome( XMesaVisual v, XMesaBuffer b ) 1025{ 1026 (void) b; 1027 v->dithered_pf = v->undithered_pf = PF_1Bit; 1028 /* if black=1 then we must flip pixel values */ 1029 v->bitFlip = (GET_BLACK_PIXEL(v) != 0); 1030} 1031 1032 1033 1034/** 1035 * When a context is bound for the first time, we can finally finish 1036 * initializing the context's visual and buffer information. 1037 * \param v the XMesaVisual to initialize 1038 * \param b the XMesaBuffer to initialize (may be NULL) 1039 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode 1040 * \param window the window/pixmap we're rendering into 1041 * \param cmap the colormap associated with the window/pixmap 1042 * \return GL_TRUE=success, GL_FALSE=failure 1043 */ 1044static GLboolean 1045initialize_visual_and_buffer(XMesaVisual v, XMesaBuffer b, 1046 XMesaDrawable window, 1047 XMesaColormap cmap) 1048{ 1049 int client = 0; 1050 const int xclass = v->mesa_visual.visualType; 1051 1052#ifdef XFree86Server 1053 client = (window) ? CLIENT_ID(window->id) : 0; 1054#endif 1055 1056 ASSERT(!b || b->xm_visual == v); 1057 1058 /* Save true bits/pixel */ 1059 v->BitsPerPixel = bits_per_pixel(v); 1060 assert(v->BitsPerPixel > 0); 1061 1062 /* RGB WINDOW: 1063 * We support RGB rendering into almost any kind of visual. 1064 */ 1065 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { 1066 setup_truecolor( v, b, cmap ); 1067 } 1068 else if (xclass == GLX_STATIC_GRAY && GET_VISUAL_DEPTH(v) == 1) { 1069 setup_monochrome( v, b ); 1070 } 1071 else if (xclass == GLX_GRAY_SCALE || xclass == GLX_STATIC_GRAY) { 1072 if (!setup_grayscale( client, v, b, cmap )) { 1073 return GL_FALSE; 1074 } 1075 } 1076 else if ((xclass == GLX_PSEUDO_COLOR || xclass == GLX_STATIC_COLOR) 1077 && GET_VISUAL_DEPTH(v)>=4 && GET_VISUAL_DEPTH(v)<=16) { 1078 if (!setup_dithered_color( client, v, b, cmap )) { 1079 return GL_FALSE; 1080 } 1081 } 1082 else { 1083 _mesa_warning(NULL, "XMesa: RGB mode rendering not supported in given visual.\n"); 1084 return GL_FALSE; 1085 } 1086 v->mesa_visual.indexBits = 0; 1087 1088 if (_mesa_getenv("MESA_NO_DITHER")) { 1089 v->dithered_pf = v->undithered_pf; 1090 } 1091 1092 1093 /* 1094 * If MESA_INFO env var is set print out some debugging info 1095 * which can help Brian figure out what's going on when a user 1096 * reports bugs. 1097 */ 1098 if (_mesa_getenv("MESA_INFO")) { 1099 printf("X/Mesa visual = %p\n", (void *) v); 1100 printf("X/Mesa dithered pf = %u\n", v->dithered_pf); 1101 printf("X/Mesa undithered pf = %u\n", v->undithered_pf); 1102 printf("X/Mesa level = %d\n", v->mesa_visual.level); 1103 printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v)); 1104 printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel); 1105 } 1106 1107 if (b && window) { 1108 char *data; 1109 1110 /* Do window-specific initializations */ 1111 1112 /* these should have been set in create_xmesa_buffer */ 1113 ASSERT(b->frontxrb->drawable == window); 1114 ASSERT(b->frontxrb->pixmap == (XMesaPixmap) window); 1115 1116 /* Setup for single/double buffering */ 1117 if (v->mesa_visual.doubleBufferMode) { 1118 /* Double buffered */ 1119 b->shm = check_for_xshm( v->display ); 1120 } 1121 1122 /* X11 graphics contexts */ 1123#ifdef XFree86Server 1124 b->gc = CreateScratchGC(v->display, window->depth); 1125#else 1126 b->gc = XCreateGC( v->display, window, 0, NULL ); 1127#endif 1128 XMesaSetFunction( v->display, b->gc, GXcopy ); 1129 1130 /* cleargc - for glClear() */ 1131#ifdef XFree86Server 1132 b->cleargc = CreateScratchGC(v->display, window->depth); 1133#else 1134 b->cleargc = XCreateGC( v->display, window, 0, NULL ); 1135#endif 1136 XMesaSetFunction( v->display, b->cleargc, GXcopy ); 1137 1138 /* 1139 * Don't generate Graphics Expose/NoExpose events in swapbuffers(). 1140 * Patch contributed by Michael Pichler May 15, 1995. 1141 */ 1142#ifdef XFree86Server 1143 b->swapgc = CreateScratchGC(v->display, window->depth); 1144 { 1145 CARD32 v[1]; 1146 v[0] = FALSE; 1147 dixChangeGC(NullClient, b->swapgc, GCGraphicsExposures, v, NULL); 1148 } 1149#else 1150 { 1151 XGCValues gcvalues; 1152 gcvalues.graphics_exposures = False; 1153 b->swapgc = XCreateGC(v->display, window, 1154 GCGraphicsExposures, &gcvalues); 1155 } 1156#endif 1157 XMesaSetFunction( v->display, b->swapgc, GXcopy ); 1158 /* 1159 * Set fill style and tile pixmap once for all for HPCR stuff 1160 * (instead of doing it each time in clear_color_HPCR_pixmap()) 1161 * Initialize whole stuff 1162 * Patch contributed by Jacques Leroy March 8, 1998. 1163 */ 1164 if (v->hpcr_clear_flag && b->backxrb && b->backxrb->pixmap) { 1165 int i; 1166 for (i = 0; i < 16; i++) { 1167 XMesaPutPixel(v->hpcr_clear_ximage, i, 0, 0); 1168 XMesaPutPixel(v->hpcr_clear_ximage, i, 1, 0); 1169 } 1170 XMesaPutImage(b->display, (XMesaDrawable) v->hpcr_clear_pixmap, 1171 b->cleargc, v->hpcr_clear_ximage, 0, 0, 0, 0, 16, 2); 1172 XMesaSetFillStyle( v->display, b->cleargc, FillTiled); 1173 XMesaSetTile( v->display, b->cleargc, v->hpcr_clear_pixmap ); 1174 } 1175 1176 /* Initialize the row buffer XImage for use in write_color_span() */ 1177 data = (char*) MALLOC(MAX_WIDTH*4); 1178#ifdef XFree86Server 1179 b->rowimage = XMesaCreateImage(GET_VISUAL_DEPTH(v), MAX_WIDTH, 1, data); 1180#else 1181 b->rowimage = XCreateImage( v->display, 1182 v->visinfo->visual, 1183 v->visinfo->depth, 1184 ZPixmap, 0, /*format, offset*/ 1185 data, /*data*/ 1186 MAX_WIDTH, 1, /*width, height*/ 1187 32, /*bitmap_pad*/ 1188 0 /*bytes_per_line*/ ); 1189#endif 1190 if (!b->rowimage) 1191 return GL_FALSE; 1192 } 1193 1194 return GL_TRUE; 1195} 1196 1197 1198 1199/* 1200 * Convert an RGBA color to a pixel value. 1201 */ 1202unsigned long 1203xmesa_color_to_pixel(GLcontext *ctx, 1204 GLubyte r, GLubyte g, GLubyte b, GLubyte a, 1205 GLuint pixelFormat) 1206{ 1207 XMesaContext xmesa = XMESA_CONTEXT(ctx); 1208 switch (pixelFormat) { 1209 case PF_Index: 1210 return 0; 1211 case PF_Truecolor: 1212 { 1213 unsigned long p; 1214 PACK_TRUECOLOR( p, r, g, b ); 1215 return p; 1216 } 1217 case PF_8A8B8G8R: 1218 return PACK_8A8B8G8R( r, g, b, a ); 1219 case PF_8A8R8G8B: 1220 return PACK_8A8R8G8B( r, g, b, a ); 1221 case PF_8R8G8B: 1222 /* fall through */ 1223 case PF_8R8G8B24: 1224 return PACK_8R8G8B( r, g, b ); 1225 case PF_5R6G5B: 1226 return PACK_5R6G5B( r, g, b ); 1227 case PF_Dither: 1228 { 1229 DITHER_SETUP; 1230 return DITHER( 1, 0, r, g, b ); 1231 } 1232 case PF_1Bit: 1233 /* 382 = (3*255)/2 */ 1234 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 1235 case PF_HPCR: 1236 return DITHER_HPCR(1, 1, r, g, b); 1237 case PF_Lookup: 1238 { 1239 LOOKUP_SETUP; 1240 return LOOKUP( r, g, b ); 1241 } 1242 case PF_Grayscale: 1243 return GRAY_RGB( r, g, b ); 1244 case PF_Dither_True: 1245 /* fall through */ 1246 case PF_Dither_5R6G5B: 1247 { 1248 unsigned long p; 1249 PACK_TRUEDITHER(p, 1, 0, r, g, b); 1250 return p; 1251 } 1252 default: 1253 _mesa_problem(ctx, "Bad pixel format in xmesa_color_to_pixel"); 1254 } 1255 return 0; 1256} 1257 1258 1259#define NUM_VISUAL_TYPES 6 1260 1261/** 1262 * Convert an X visual type to a GLX visual type. 1263 * 1264 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.) 1265 * to be converted. 1266 * \return If \c visualType is a valid X visual type, a GLX visual type will 1267 * be returned. Otherwise \c GLX_NONE will be returned. 1268 * 1269 * \note 1270 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the 1271 * DRI CVS tree. 1272 */ 1273static GLint 1274xmesa_convert_from_x_visual_type( int visualType ) 1275{ 1276 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = { 1277 GLX_STATIC_GRAY, GLX_GRAY_SCALE, 1278 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR, 1279 GLX_TRUE_COLOR, GLX_DIRECT_COLOR 1280 }; 1281 1282 return ( (unsigned) visualType < NUM_VISUAL_TYPES ) 1283 ? glx_visual_types[ visualType ] : GLX_NONE; 1284} 1285 1286 1287/**********************************************************************/ 1288/***** Public Functions *****/ 1289/**********************************************************************/ 1290 1291 1292/* 1293 * Create a new X/Mesa visual. 1294 * Input: display - X11 display 1295 * visinfo - an XVisualInfo pointer 1296 * rgb_flag - GL_TRUE = RGB mode, 1297 * GL_FALSE = color index mode 1298 * alpha_flag - alpha buffer requested? 1299 * db_flag - GL_TRUE = double-buffered, 1300 * GL_FALSE = single buffered 1301 * stereo_flag - stereo visual? 1302 * ximage_flag - GL_TRUE = use an XImage for back buffer, 1303 * GL_FALSE = use an off-screen pixmap for back buffer 1304 * depth_size - requested bits/depth values, or zero 1305 * stencil_size - requested bits/stencil values, or zero 1306 * accum_red_size - requested bits/red accum values, or zero 1307 * accum_green_size - requested bits/green accum values, or zero 1308 * accum_blue_size - requested bits/blue accum values, or zero 1309 * accum_alpha_size - requested bits/alpha accum values, or zero 1310 * num_samples - number of samples/pixel if multisampling, or zero 1311 * level - visual level, usually 0 1312 * visualCaveat - ala the GLX extension, usually GLX_NONE 1313 * Return; a new XMesaVisual or 0 if error. 1314 */ 1315PUBLIC 1316XMesaVisual XMesaCreateVisual( XMesaDisplay *display, 1317 XMesaVisualInfo visinfo, 1318 GLboolean rgb_flag, 1319 GLboolean alpha_flag, 1320 GLboolean db_flag, 1321 GLboolean stereo_flag, 1322 GLboolean ximage_flag, 1323 GLint depth_size, 1324 GLint stencil_size, 1325 GLint accum_red_size, 1326 GLint accum_green_size, 1327 GLint accum_blue_size, 1328 GLint accum_alpha_size, 1329 GLint num_samples, 1330 GLint level, 1331 GLint visualCaveat ) 1332{ 1333 char *gamma; 1334 XMesaVisual v; 1335 GLint red_bits, green_bits, blue_bits, alpha_bits; 1336 1337#ifndef XFree86Server 1338 /* For debugging only */ 1339 if (_mesa_getenv("MESA_XSYNC")) { 1340 /* This makes debugging X easier. 1341 * In your debugger, set a breakpoint on _XError to stop when an 1342 * X protocol error is generated. 1343 */ 1344 XSynchronize( display, 1 ); 1345 } 1346#endif 1347 1348 /* Color-index rendering not supported. */ 1349 if (!rgb_flag) 1350 return NULL; 1351 1352 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 1353 if (!v) { 1354 return NULL; 1355 } 1356 1357 v->display = display; 1358 1359 /* Save a copy of the XVisualInfo struct because the user may Xfree() 1360 * the struct but we may need some of the information contained in it 1361 * at a later time. 1362 */ 1363#ifndef XFree86Server 1364 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 1365 if(!v->visinfo) { 1366 free(v); 1367 return NULL; 1368 } 1369 memcpy(v->visinfo, visinfo, sizeof(*visinfo)); 1370#endif 1371 1372 /* check for MESA_GAMMA environment variable */ 1373 gamma = _mesa_getenv("MESA_GAMMA"); 1374 if (gamma) { 1375 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0; 1376 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma ); 1377 if (v->RedGamma<=0.0) v->RedGamma = 1.0; 1378 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma; 1379 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma; 1380 } 1381 else { 1382 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0; 1383 } 1384 1385 v->ximage_flag = ximage_flag; 1386 1387#ifdef XFree86Server 1388 /* We could calculate these values by ourselves. nplanes is either the sum 1389 * of the red, green, and blue bits or the number index bits. 1390 * ColormapEntries is either (1U << index_bits) or 1391 * (1U << max(redBits, greenBits, blueBits)). 1392 */ 1393 assert(visinfo->nplanes > 0); 1394 v->nplanes = visinfo->nplanes; 1395 v->ColormapEntries = visinfo->ColormapEntries; 1396 1397 v->mesa_visual.redMask = visinfo->redMask; 1398 v->mesa_visual.greenMask = visinfo->greenMask; 1399 v->mesa_visual.blueMask = visinfo->blueMask; 1400 v->visualID = visinfo->vid; 1401 v->screen = 0; /* FIXME: What should be done here? */ 1402#else 1403 v->mesa_visual.redMask = visinfo->red_mask; 1404 v->mesa_visual.greenMask = visinfo->green_mask; 1405 v->mesa_visual.blueMask = visinfo->blue_mask; 1406 v->visualID = visinfo->visualid; 1407 v->screen = visinfo->screen; 1408#endif 1409 1410#if defined(XFree86Server) || !(defined(__cplusplus) || defined(c_plusplus)) 1411 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->class); 1412#else 1413 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->c_class); 1414#endif 1415 1416 v->mesa_visual.visualRating = visualCaveat; 1417 1418 if (alpha_flag) 1419 v->mesa_visual.alphaBits = 8; 1420 1421 (void) initialize_visual_and_buffer( v, NULL, 0, 0 ); 1422 1423 { 1424 const int xclass = v->mesa_visual.visualType; 1425 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { 1426 red_bits = _mesa_bitcount(GET_REDMASK(v)); 1427 green_bits = _mesa_bitcount(GET_GREENMASK(v)); 1428 blue_bits = _mesa_bitcount(GET_BLUEMASK(v)); 1429 } 1430 else { 1431 /* this is an approximation */ 1432 int depth; 1433 depth = GET_VISUAL_DEPTH(v); 1434 red_bits = depth / 3; 1435 depth -= red_bits; 1436 green_bits = depth / 2; 1437 depth -= green_bits; 1438 blue_bits = depth; 1439 alpha_bits = 0; 1440 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) ); 1441 } 1442 alpha_bits = v->mesa_visual.alphaBits; 1443 } 1444 1445 _mesa_initialize_visual( &v->mesa_visual, 1446 db_flag, stereo_flag, 1447 red_bits, green_bits, 1448 blue_bits, alpha_bits, 1449 depth_size, 1450 stencil_size, 1451 accum_red_size, accum_green_size, 1452 accum_blue_size, accum_alpha_size, 1453 0 ); 1454 1455 /* XXX minor hack */ 1456 v->mesa_visual.level = level; 1457 return v; 1458} 1459 1460 1461PUBLIC 1462void XMesaDestroyVisual( XMesaVisual v ) 1463{ 1464#ifndef XFree86Server 1465 free(v->visinfo); 1466#endif 1467 free(v); 1468} 1469 1470 1471 1472/** 1473 * Create a new XMesaContext. 1474 * \param v the XMesaVisual 1475 * \param share_list another XMesaContext with which to share display 1476 * lists or NULL if no sharing is wanted. 1477 * \return an XMesaContext or NULL if error. 1478 */ 1479PUBLIC 1480XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) 1481{ 1482 static GLboolean firstTime = GL_TRUE; 1483 XMesaContext c; 1484 GLcontext *mesaCtx; 1485 struct dd_function_table functions; 1486 TNLcontext *tnl; 1487 1488 if (firstTime) { 1489 _glthread_INIT_MUTEX(_xmesa_lock); 1490 firstTime = GL_FALSE; 1491 } 1492 1493 /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */ 1494 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 1495 if (!c) 1496 return NULL; 1497 1498 mesaCtx = &(c->mesa); 1499 1500 /* initialize with default driver functions, then plug in XMesa funcs */ 1501 _mesa_init_driver_functions(&functions); 1502 xmesa_init_driver_functions(v, &functions); 1503 if (!_mesa_initialize_context(mesaCtx, &v->mesa_visual, 1504 share_list ? &(share_list->mesa) : (GLcontext *) NULL, 1505 &functions, (void *) c)) { 1506 free(c); 1507 return NULL; 1508 } 1509 1510 /* Enable this to exercise fixed function -> shader translation 1511 * with software rendering. 1512 */ 1513 if (0) { 1514 mesaCtx->VertexProgram._MaintainTnlProgram = GL_TRUE; 1515 mesaCtx->FragmentProgram._MaintainTexEnvProgram = GL_TRUE; 1516 } 1517 1518 _mesa_enable_sw_extensions(mesaCtx); 1519 _mesa_enable_1_3_extensions(mesaCtx); 1520 _mesa_enable_1_4_extensions(mesaCtx); 1521 _mesa_enable_1_5_extensions(mesaCtx); 1522 _mesa_enable_2_0_extensions(mesaCtx); 1523 _mesa_enable_2_1_extensions(mesaCtx); 1524#if ENABLE_EXT_texure_compression_s3tc 1525 if (mesaCtx->Mesa_DXTn) { 1526 _mesa_enable_extension(mesaCtx, "GL_EXT_texture_compression_s3tc"); 1527 _mesa_enable_extension(mesaCtx, "GL_S3_s3tc"); 1528 } 1529 _mesa_enable_extension(mesaCtx, "GL_3DFX_texture_compression_FXT1"); 1530#endif 1531#if ENABLE_EXT_timer_query 1532 _mesa_enable_extension(mesaCtx, "GL_EXT_timer_query"); 1533#endif 1534 1535#ifdef XFree86Server 1536 /* If we're running in the X server, do bounds checking to prevent 1537 * segfaults and server crashes! 1538 */ 1539 mesaCtx->Const.CheckArrayBounds = GL_TRUE; 1540#endif 1541 1542 /* finish up xmesa context initializations */ 1543 c->swapbytes = CHECK_BYTE_ORDER(v) ? GL_FALSE : GL_TRUE; 1544 c->xm_visual = v; 1545 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ 1546 c->display = v->display; 1547 c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */ 1548 1549 /* Initialize the software rasterizer and helper modules. 1550 */ 1551 if (!_swrast_CreateContext( mesaCtx ) || 1552 !_vbo_CreateContext( mesaCtx ) || 1553 !_tnl_CreateContext( mesaCtx ) || 1554 !_swsetup_CreateContext( mesaCtx )) { 1555 _mesa_free_context_data(&c->mesa); 1556 free(c); 1557 return NULL; 1558 } 1559 1560 /* tnl setup */ 1561 tnl = TNL_CONTEXT(mesaCtx); 1562 tnl->Driver.RunPipeline = _tnl_run_pipeline; 1563 /* swrast setup */ 1564 xmesa_register_swrast_functions( mesaCtx ); 1565 _swsetup_Wakeup(mesaCtx); 1566 1567 _mesa_meta_init(mesaCtx); 1568 1569 return c; 1570} 1571 1572 1573 1574PUBLIC 1575void XMesaDestroyContext( XMesaContext c ) 1576{ 1577 GLcontext *mesaCtx = &c->mesa; 1578 1579#ifdef FX 1580 FXdestroyContext( XMESA_BUFFER(mesaCtx->DrawBuffer) ); 1581#endif 1582 1583 _mesa_meta_free( mesaCtx ); 1584 1585 _swsetup_DestroyContext( mesaCtx ); 1586 _swrast_DestroyContext( mesaCtx ); 1587 _tnl_DestroyContext( mesaCtx ); 1588 _vbo_DestroyContext( mesaCtx ); 1589 _mesa_free_context_data( mesaCtx ); 1590 free( c ); 1591} 1592 1593 1594 1595/** 1596 * Private function for creating an XMesaBuffer which corresponds to an 1597 * X window or pixmap. 1598 * \param v the window's XMesaVisual 1599 * \param w the window we're wrapping 1600 * \return new XMesaBuffer or NULL if error 1601 */ 1602PUBLIC XMesaBuffer 1603XMesaCreateWindowBuffer(XMesaVisual v, XMesaWindow w) 1604{ 1605#ifndef XFree86Server 1606 XWindowAttributes attr; 1607#endif 1608 XMesaBuffer b; 1609 XMesaColormap cmap; 1610 int depth; 1611 1612 assert(v); 1613 assert(w); 1614 1615 /* Check that window depth matches visual depth */ 1616#ifdef XFree86Server 1617 depth = ((XMesaDrawable)w)->depth; 1618#else 1619 XGetWindowAttributes( v->display, w, &attr ); 1620 depth = attr.depth; 1621#endif 1622 if (GET_VISUAL_DEPTH(v) != depth) { 1623 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n", 1624 GET_VISUAL_DEPTH(v), depth); 1625 return NULL; 1626 } 1627 1628 /* Find colormap */ 1629#ifdef XFree86Server 1630 cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP); 1631#else 1632 if (attr.colormap) { 1633 cmap = attr.colormap; 1634 } 1635 else { 1636 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w); 1637 /* this is weird, a window w/out a colormap!? */ 1638 /* OK, let's just allocate a new one and hope for the best */ 1639 cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 1640 } 1641#endif 1642 1643 b = create_xmesa_buffer((XMesaDrawable) w, WINDOW, v, cmap); 1644 if (!b) 1645 return NULL; 1646 1647 if (!initialize_visual_and_buffer( v, b, (XMesaDrawable) w, cmap )) { 1648 xmesa_free_buffer(b); 1649 return NULL; 1650 } 1651 1652 return b; 1653} 1654 1655 1656 1657/** 1658 * Create a new XMesaBuffer from an X pixmap. 1659 * 1660 * \param v the XMesaVisual 1661 * \param p the pixmap 1662 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or 1663 * \c GLX_DIRECT_COLOR visual for the pixmap 1664 * \returns new XMesaBuffer or NULL if error 1665 */ 1666PUBLIC XMesaBuffer 1667XMesaCreatePixmapBuffer(XMesaVisual v, XMesaPixmap p, XMesaColormap cmap) 1668{ 1669 XMesaBuffer b; 1670 1671 assert(v); 1672 1673 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap); 1674 if (!b) 1675 return NULL; 1676 1677 if (!initialize_visual_and_buffer(v, b, (XMesaDrawable) p, cmap)) { 1678 xmesa_free_buffer(b); 1679 return NULL; 1680 } 1681 1682 return b; 1683} 1684 1685 1686/** 1687 * For GLX_EXT_texture_from_pixmap 1688 */ 1689XMesaBuffer 1690XMesaCreatePixmapTextureBuffer(XMesaVisual v, XMesaPixmap p, 1691 XMesaColormap cmap, 1692 int format, int target, int mipmap) 1693{ 1694 GET_CURRENT_CONTEXT(ctx); 1695 XMesaBuffer b; 1696 GLuint width, height; 1697 1698 assert(v); 1699 1700 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap); 1701 if (!b) 1702 return NULL; 1703 1704 /* get pixmap size, update framebuffer/renderbuffer dims */ 1705 xmesa_get_window_size(v->display, b, &width, &height); 1706 _mesa_resize_framebuffer(NULL, &(b->mesa_buffer), width, height); 1707 1708 if (target == 0) { 1709 /* examine dims */ 1710 if (ctx->Extensions.ARB_texture_non_power_of_two) { 1711 target = GLX_TEXTURE_2D_EXT; 1712 } 1713 else if ( _mesa_bitcount(width) == 1 1714 && _mesa_bitcount(height) == 1) { 1715 /* power of two size */ 1716 if (height == 1) { 1717 target = GLX_TEXTURE_1D_EXT; 1718 } 1719 else { 1720 target = GLX_TEXTURE_2D_EXT; 1721 } 1722 } 1723 else if (ctx->Extensions.NV_texture_rectangle) { 1724 target = GLX_TEXTURE_RECTANGLE_EXT; 1725 } 1726 else { 1727 /* non power of two textures not supported */ 1728 XMesaDestroyBuffer(b); 1729 return 0; 1730 } 1731 } 1732 1733 b->TextureTarget = target; 1734 b->TextureFormat = format; 1735 b->TextureMipmap = mipmap; 1736 1737 if (!initialize_visual_and_buffer(v, b, (XMesaDrawable) p, cmap)) { 1738 xmesa_free_buffer(b); 1739 return NULL; 1740 } 1741 1742 return b; 1743} 1744 1745 1746 1747XMesaBuffer 1748XMesaCreatePBuffer(XMesaVisual v, XMesaColormap cmap, 1749 unsigned int width, unsigned int height) 1750{ 1751#ifndef XFree86Server 1752 XMesaWindow root; 1753 XMesaDrawable drawable; /* X Pixmap Drawable */ 1754 XMesaBuffer b; 1755 1756 /* allocate pixmap for front buffer */ 1757 root = RootWindow( v->display, v->visinfo->screen ); 1758 drawable = XCreatePixmap(v->display, root, width, height, 1759 v->visinfo->depth); 1760 if (!drawable) 1761 return NULL; 1762 1763 b = create_xmesa_buffer(drawable, PBUFFER, v, cmap); 1764 if (!b) 1765 return NULL; 1766 1767 if (!initialize_visual_and_buffer(v, b, drawable, cmap)) { 1768 xmesa_free_buffer(b); 1769 return NULL; 1770 } 1771 1772 return b; 1773#else 1774 return 0; 1775#endif 1776} 1777 1778 1779 1780/* 1781 * Deallocate an XMesaBuffer structure and all related info. 1782 */ 1783PUBLIC void 1784XMesaDestroyBuffer(XMesaBuffer b) 1785{ 1786 xmesa_free_buffer(b); 1787} 1788 1789 1790/** 1791 * Query the current window size and update the corresponding GLframebuffer 1792 * and all attached renderbuffers. 1793 * Called when: 1794 * 1. the first time a buffer is bound to a context. 1795 * 2. from glViewport to poll for window size changes 1796 * 3. from the XMesaResizeBuffers() API function. 1797 * Note: it's possible (and legal) for xmctx to be NULL. That can happen 1798 * when resizing a buffer when no rendering context is bound. 1799 */ 1800void 1801xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer) 1802{ 1803 GLuint width, height; 1804 xmesa_get_window_size(drawBuffer->display, drawBuffer, &width, &height); 1805 if (drawBuffer->mesa_buffer.Width != width || 1806 drawBuffer->mesa_buffer.Height != height) { 1807 GLcontext *ctx = xmctx ? &xmctx->mesa : NULL; 1808 _mesa_resize_framebuffer(ctx, &(drawBuffer->mesa_buffer), width, height); 1809 } 1810 drawBuffer->mesa_buffer.Initialized = GL_TRUE; /* XXX TEMPORARY? */ 1811} 1812 1813 1814/* 1815 * Bind buffer b to context c and make c the current rendering context. 1816 */ 1817GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b ) 1818{ 1819 return XMesaMakeCurrent2( c, b, b ); 1820} 1821 1822 1823/* 1824 * Bind buffer b to context c and make c the current rendering context. 1825 */ 1826PUBLIC 1827GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, 1828 XMesaBuffer readBuffer ) 1829{ 1830 if (c) { 1831 if (!drawBuffer || !readBuffer) 1832 return GL_FALSE; /* must specify buffers! */ 1833 1834 if (&(c->mesa) == _mesa_get_current_context() 1835 && c->mesa.DrawBuffer == &drawBuffer->mesa_buffer 1836 && c->mesa.ReadBuffer == &readBuffer->mesa_buffer 1837 && XMESA_BUFFER(c->mesa.DrawBuffer)->wasCurrent) { 1838 /* same context and buffer, do nothing */ 1839 return GL_TRUE; 1840 } 1841 1842 c->xm_buffer = drawBuffer; 1843 1844#ifdef FX 1845 if (FXmakeCurrent( drawBuffer )) 1846 return GL_TRUE; 1847#endif 1848 1849 /* Call this periodically to detect when the user has begun using 1850 * GL rendering from multiple threads. 1851 */ 1852 _glapi_check_multithread(); 1853 1854 xmesa_check_and_update_buffer_size(c, drawBuffer); 1855 if (readBuffer != drawBuffer) 1856 xmesa_check_and_update_buffer_size(c, readBuffer); 1857 1858 _mesa_make_current(&(c->mesa), 1859 &drawBuffer->mesa_buffer, 1860 &readBuffer->mesa_buffer); 1861 1862 /* 1863 * Must recompute and set these pixel values because colormap 1864 * can be different for different windows. 1865 */ 1866 c->clearpixel = xmesa_color_to_pixel( &c->mesa, 1867 c->clearcolor[0], 1868 c->clearcolor[1], 1869 c->clearcolor[2], 1870 c->clearcolor[3], 1871 c->xm_visual->undithered_pf); 1872 XMesaSetForeground(c->display, drawBuffer->cleargc, c->clearpixel); 1873 1874 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 1875 drawBuffer->wasCurrent = GL_TRUE; 1876 } 1877 else { 1878 /* Detach */ 1879 _mesa_make_current( NULL, NULL, NULL ); 1880 } 1881 return GL_TRUE; 1882} 1883 1884 1885/* 1886 * Unbind the context c from its buffer. 1887 */ 1888GLboolean XMesaUnbindContext( XMesaContext c ) 1889{ 1890 /* A no-op for XFree86 integration purposes */ 1891 return GL_TRUE; 1892} 1893 1894 1895XMesaContext XMesaGetCurrentContext( void ) 1896{ 1897 GET_CURRENT_CONTEXT(ctx); 1898 if (ctx) { 1899 XMesaContext xmesa = XMESA_CONTEXT(ctx); 1900 return xmesa; 1901 } 1902 else { 1903 return 0; 1904 } 1905} 1906 1907 1908XMesaBuffer XMesaGetCurrentBuffer( void ) 1909{ 1910 GET_CURRENT_CONTEXT(ctx); 1911 if (ctx) { 1912 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer); 1913 return xmbuf; 1914 } 1915 else { 1916 return 0; 1917 } 1918} 1919 1920 1921/* New in Mesa 3.1 */ 1922XMesaBuffer XMesaGetCurrentReadBuffer( void ) 1923{ 1924 GET_CURRENT_CONTEXT(ctx); 1925 if (ctx) { 1926 return XMESA_BUFFER(ctx->ReadBuffer); 1927 } 1928 else { 1929 return 0; 1930 } 1931} 1932 1933 1934#ifdef XFree86Server 1935PUBLIC 1936GLboolean XMesaForceCurrent(XMesaContext c) 1937{ 1938 if (c) { 1939 _glapi_set_dispatch(c->mesa.CurrentDispatch); 1940 1941 if (&(c->mesa) != _mesa_get_current_context()) { 1942 _mesa_make_current(&c->mesa, c->mesa.DrawBuffer, c->mesa.ReadBuffer); 1943 } 1944 } 1945 else { 1946 _mesa_make_current(NULL, NULL, NULL); 1947 } 1948 return GL_TRUE; 1949} 1950 1951 1952PUBLIC 1953GLboolean XMesaLoseCurrent(XMesaContext c) 1954{ 1955 (void) c; 1956 _mesa_make_current(NULL, NULL, NULL); 1957 return GL_TRUE; 1958} 1959 1960 1961PUBLIC 1962GLboolean XMesaCopyContext( XMesaContext xm_src, XMesaContext xm_dst, GLuint mask ) 1963{ 1964 _mesa_copy_context(&xm_src->mesa, &xm_dst->mesa, mask); 1965 return GL_TRUE; 1966} 1967#endif /* XFree86Server */ 1968 1969 1970#ifndef FX 1971GLboolean XMesaSetFXmode( GLint mode ) 1972{ 1973 (void) mode; 1974 return GL_FALSE; 1975} 1976#endif 1977 1978 1979 1980/* 1981 * Copy the back buffer to the front buffer. If there's no back buffer 1982 * this is a no-op. 1983 */ 1984PUBLIC 1985void XMesaSwapBuffers( XMesaBuffer b ) 1986{ 1987 GET_CURRENT_CONTEXT(ctx); 1988 1989 if (!b->backxrb) { 1990 /* single buffered */ 1991 return; 1992 } 1993 1994 /* If we're swapping the buffer associated with the current context 1995 * we have to flush any pending rendering commands first. 1996 */ 1997 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 1998 _mesa_notifySwapBuffers(ctx); 1999 2000 if (b->db_mode) { 2001#ifdef FX 2002 if (FXswapBuffers(b)) 2003 return; 2004#endif 2005 if (b->backxrb->ximage) { 2006 /* Copy Ximage (back buf) from client memory to server window */ 2007#if defined(USE_XSHM) && !defined(XFree86Server) 2008 if (b->shm) { 2009 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2010 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable, 2011 b->swapgc, 2012 b->backxrb->ximage, 0, 0, 2013 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height, 2014 False ); 2015 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2016 } 2017 else 2018#endif 2019 { 2020 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2021 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable, 2022 b->swapgc, 2023 b->backxrb->ximage, 0, 0, 2024 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height ); 2025 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2026 } 2027 } 2028 else if (b->backxrb->pixmap) { 2029 /* Copy pixmap (back buf) to window (front buf) on server */ 2030 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2031 XMesaCopyArea( b->xm_visual->display, 2032 b->backxrb->pixmap, /* source drawable */ 2033 b->frontxrb->drawable, /* dest. drawable */ 2034 b->swapgc, 2035 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height, 2036 0, 0 /* dest region */ 2037 ); 2038 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2039 } 2040 2041 if (b->swAlpha) 2042 _mesa_copy_soft_alpha_renderbuffers(ctx, &b->mesa_buffer); 2043 } 2044#if !defined(XFree86Server) 2045 XSync( b->xm_visual->display, False ); 2046#endif 2047} 2048 2049 2050 2051/* 2052 * Copy sub-region of back buffer to front buffer 2053 */ 2054void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 2055{ 2056 GET_CURRENT_CONTEXT(ctx); 2057 2058 /* If we're swapping the buffer associated with the current context 2059 * we have to flush any pending rendering commands first. 2060 */ 2061 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2062 _mesa_notifySwapBuffers(ctx); 2063 2064 if (!b->backxrb) { 2065 /* single buffered */ 2066 return; 2067 } 2068 2069 if (b->db_mode) { 2070 int yTop = b->mesa_buffer.Height - y - height; 2071#ifdef FX 2072 if (FXswapBuffers(b)) 2073 return; 2074#endif 2075 if (b->backxrb->ximage) { 2076 /* Copy Ximage from host's memory to server's window */ 2077#if defined(USE_XSHM) && !defined(XFree86Server) 2078 if (b->shm) { 2079 /* XXX assuming width and height aren't too large! */ 2080 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable, 2081 b->swapgc, 2082 b->backxrb->ximage, x, yTop, 2083 x, yTop, width, height, False ); 2084 /* wait for finished event??? */ 2085 } 2086 else 2087#endif 2088 { 2089 /* XXX assuming width and height aren't too large! */ 2090 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable, 2091 b->swapgc, 2092 b->backxrb->ximage, x, yTop, 2093 x, yTop, width, height ); 2094 } 2095 } 2096 else { 2097 /* Copy pixmap to window on server */ 2098 XMesaCopyArea( b->xm_visual->display, 2099 b->backxrb->pixmap, /* source drawable */ 2100 b->frontxrb->drawable, /* dest. drawable */ 2101 b->swapgc, 2102 x, yTop, width, height, /* source region */ 2103 x, yTop /* dest region */ 2104 ); 2105 } 2106 } 2107} 2108 2109 2110/* 2111 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function 2112 * is a way to get "under the hood" of X/Mesa so one can manipulate the 2113 * back buffer directly. 2114 * Output: pixmap - pointer to back buffer's Pixmap, or 0 2115 * ximage - pointer to back buffer's XImage, or NULL 2116 * Return: GL_TRUE = context is double buffered 2117 * GL_FALSE = context is single buffered 2118 */ 2119#ifndef XFree86Server 2120GLboolean XMesaGetBackBuffer( XMesaBuffer b, 2121 XMesaPixmap *pixmap, 2122 XMesaImage **ximage ) 2123{ 2124 if (b->db_mode) { 2125 if (pixmap) 2126 *pixmap = b->backxrb->pixmap; 2127 if (ximage) 2128 *ximage = b->backxrb->ximage; 2129 return GL_TRUE; 2130 } 2131 else { 2132 *pixmap = 0; 2133 *ximage = NULL; 2134 return GL_FALSE; 2135 } 2136} 2137#endif /* XFree86Server */ 2138 2139 2140/* 2141 * Return the depth buffer associated with an XMesaBuffer. 2142 * Input: b - the XMesa buffer handle 2143 * Output: width, height - size of buffer in pixels 2144 * bytesPerValue - bytes per depth value (2 or 4) 2145 * buffer - pointer to depth buffer values 2146 * Return: GL_TRUE or GL_FALSE to indicate success or failure. 2147 */ 2148GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height, 2149 GLint *bytesPerValue, void **buffer ) 2150{ 2151 struct gl_renderbuffer *rb 2152 = b->mesa_buffer.Attachment[BUFFER_DEPTH].Renderbuffer; 2153 if (!rb || !rb->Data) { 2154 *width = 0; 2155 *height = 0; 2156 *bytesPerValue = 0; 2157 *buffer = 0; 2158 return GL_FALSE; 2159 } 2160 else { 2161 *width = b->mesa_buffer.Width; 2162 *height = b->mesa_buffer.Height; 2163 *bytesPerValue = b->mesa_buffer.Visual.depthBits <= 16 2164 ? sizeof(GLushort) : sizeof(GLuint); 2165 *buffer = rb->Data; 2166 return GL_TRUE; 2167 } 2168} 2169 2170 2171void XMesaFlush( XMesaContext c ) 2172{ 2173 if (c && c->xm_visual) { 2174#ifdef XFree86Server 2175 /* NOT_NEEDED */ 2176#else 2177 XSync( c->xm_visual->display, False ); 2178#endif 2179 } 2180} 2181 2182 2183 2184const char *XMesaGetString( XMesaContext c, int name ) 2185{ 2186 (void) c; 2187 if (name==XMESA_VERSION) { 2188 return "5.0"; 2189 } 2190 else if (name==XMESA_EXTENSIONS) { 2191 return ""; 2192 } 2193 else { 2194 return NULL; 2195 } 2196} 2197 2198 2199 2200XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d ) 2201{ 2202 XMesaBuffer b; 2203 for (b=XMesaBufferList; b; b=b->Next) { 2204 if (b->frontxrb->drawable == d && b->display == dpy) { 2205 return b; 2206 } 2207 } 2208 return NULL; 2209} 2210 2211 2212/** 2213 * Free/destroy all XMesaBuffers associated with given display. 2214 */ 2215void xmesa_destroy_buffers_on_display(XMesaDisplay *dpy) 2216{ 2217 XMesaBuffer b, next; 2218 for (b = XMesaBufferList; b; b = next) { 2219 next = b->Next; 2220 if (b->display == dpy) { 2221 xmesa_free_buffer(b); 2222 } 2223 } 2224} 2225 2226 2227/* 2228 * Look for XMesaBuffers whose X window has been destroyed. 2229 * Deallocate any such XMesaBuffers. 2230 */ 2231void XMesaGarbageCollect( void ) 2232{ 2233 XMesaBuffer b, next; 2234 for (b=XMesaBufferList; b; b=next) { 2235 next = b->Next; 2236 if (b->display && b->frontxrb->drawable && b->type == WINDOW) { 2237#ifdef XFree86Server 2238 /* NOT_NEEDED */ 2239#else 2240 XSync(b->display, False); 2241 if (!window_exists( b->display, b->frontxrb->drawable )) { 2242 /* found a dead window, free the ancillary info */ 2243 XMesaDestroyBuffer( b ); 2244 } 2245#endif 2246 } 2247 } 2248} 2249 2250 2251unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y, 2252 GLfloat red, GLfloat green, 2253 GLfloat blue, GLfloat alpha ) 2254{ 2255 GLcontext *ctx = &xmesa->mesa; 2256 GLint r = (GLint) (red * 255.0F); 2257 GLint g = (GLint) (green * 255.0F); 2258 GLint b = (GLint) (blue * 255.0F); 2259 GLint a = (GLint) (alpha * 255.0F); 2260 2261 switch (xmesa->pixelformat) { 2262 case PF_Index: 2263 return 0; 2264 case PF_Truecolor: 2265 { 2266 unsigned long p; 2267 PACK_TRUECOLOR( p, r, g, b ); 2268 return p; 2269 } 2270 case PF_8A8B8G8R: 2271 return PACK_8A8B8G8R( r, g, b, a ); 2272 case PF_8A8R8G8B: 2273 return PACK_8A8R8G8B( r, g, b, a ); 2274 case PF_8R8G8B: 2275 return PACK_8R8G8B( r, g, b ); 2276 case PF_5R6G5B: 2277 return PACK_5R6G5B( r, g, b ); 2278 case PF_Dither: 2279 { 2280 DITHER_SETUP; 2281 return DITHER( x, y, r, g, b ); 2282 } 2283 case PF_1Bit: 2284 /* 382 = (3*255)/2 */ 2285 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 2286 case PF_HPCR: 2287 return DITHER_HPCR(x, y, r, g, b); 2288 case PF_Lookup: 2289 { 2290 LOOKUP_SETUP; 2291 return LOOKUP( r, g, b ); 2292 } 2293 case PF_Grayscale: 2294 return GRAY_RGB( r, g, b ); 2295 case PF_Dither_5R6G5B: 2296 /* fall through */ 2297 case PF_Dither_True: 2298 { 2299 unsigned long p; 2300 PACK_TRUEDITHER(p, x, y, r, g, b); 2301 return p; 2302 } 2303 default: 2304 _mesa_problem(NULL, "Bad pixel format in XMesaDitherColor"); 2305 } 2306 return 0; 2307} 2308 2309 2310/* 2311 * This is typically called when the window size changes and we need 2312 * to reallocate the buffer's back/depth/stencil/accum buffers. 2313 */ 2314PUBLIC void 2315XMesaResizeBuffers( XMesaBuffer b ) 2316{ 2317 GET_CURRENT_CONTEXT(ctx); 2318 XMesaContext xmctx = XMESA_CONTEXT(ctx); 2319 if (!xmctx) 2320 return; 2321 xmesa_check_and_update_buffer_size(xmctx, b); 2322} 2323 2324 2325static GLint 2326xbuffer_to_renderbuffer(int buffer) 2327{ 2328 assert(MAX_AUX_BUFFERS <= 4); 2329 2330 switch (buffer) { 2331 case GLX_FRONT_LEFT_EXT: 2332 return BUFFER_FRONT_LEFT; 2333 case GLX_FRONT_RIGHT_EXT: 2334 return BUFFER_FRONT_RIGHT; 2335 case GLX_BACK_LEFT_EXT: 2336 return BUFFER_BACK_LEFT; 2337 case GLX_BACK_RIGHT_EXT: 2338 return BUFFER_BACK_RIGHT; 2339 case GLX_AUX0_EXT: 2340 return BUFFER_AUX0; 2341 case GLX_AUX1_EXT: 2342 case GLX_AUX2_EXT: 2343 case GLX_AUX3_EXT: 2344 case GLX_AUX4_EXT: 2345 case GLX_AUX5_EXT: 2346 case GLX_AUX6_EXT: 2347 case GLX_AUX7_EXT: 2348 case GLX_AUX8_EXT: 2349 case GLX_AUX9_EXT: 2350 default: 2351 /* BadValue error */ 2352 return -1; 2353 } 2354} 2355 2356 2357PUBLIC void 2358XMesaBindTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer, 2359 const int *attrib_list) 2360{ 2361#if 0 2362 GET_CURRENT_CONTEXT(ctx); 2363 const GLuint unit = ctx->Texture.CurrentUnit; 2364 struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit]; 2365 struct gl_texture_object *texObj; 2366#endif 2367 struct gl_renderbuffer *rb; 2368 struct xmesa_renderbuffer *xrb; 2369 GLint b; 2370 XMesaImage *img = NULL; 2371 GLboolean freeImg = GL_FALSE; 2372 2373 b = xbuffer_to_renderbuffer(buffer); 2374 if (b < 0) 2375 return; 2376 2377 if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_NONE_EXT) 2378 return; /* BadMatch error */ 2379 2380 rb = drawable->mesa_buffer.Attachment[b].Renderbuffer; 2381 if (!rb) { 2382 /* invalid buffer */ 2383 return; 2384 } 2385 xrb = xmesa_renderbuffer(rb); 2386 2387#if 0 2388 switch (drawable->TextureTarget) { 2389 case GLX_TEXTURE_1D_EXT: 2390 texObj = texUnit->CurrentTex[TEXTURE_1D_INDEX]; 2391 break; 2392 case GLX_TEXTURE_2D_EXT: 2393 texObj = texUnit->CurrentTex[TEXTURE_2D_INDEX]; 2394 break; 2395 case GLX_TEXTURE_RECTANGLE_EXT: 2396 texObj = texUnit->CurrentTex[TEXTURE_RECT_INDEX]; 2397 break; 2398 default: 2399 return; /* BadMatch error */ 2400 } 2401#endif 2402 2403 /* 2404 * The following is a quick and simple way to implement 2405 * BindTexImage. The better way is to write some new FetchTexel() 2406 * functions which would extract texels from XImages. We'd still 2407 * need to use GetImage when texturing from a Pixmap (front buffer) 2408 * but texturing from a back buffer (XImage) would avoid an image 2409 * copy. 2410 */ 2411 2412 /* get XImage */ 2413 if (xrb->pixmap) { 2414 img = XMesaGetImage(dpy, xrb->pixmap, 0, 0, rb->Width, rb->Height, ~0L, 2415 ZPixmap); 2416 freeImg = GL_TRUE; 2417 } 2418 else if (xrb->ximage) { 2419 img = xrb->ximage; 2420 } 2421 2422 /* store the XImage as a new texture image */ 2423 if (img) { 2424 GLenum format, type, intFormat; 2425 if (img->bits_per_pixel == 32) { 2426 format = GL_BGRA; 2427 type = GL_UNSIGNED_BYTE; 2428 intFormat = GL_RGBA; 2429 } 2430 else if (img->bits_per_pixel == 24) { 2431 format = GL_BGR; 2432 type = GL_UNSIGNED_BYTE; 2433 intFormat = GL_RGB; 2434 } 2435 else if (img->bits_per_pixel == 16) { 2436 format = GL_BGR; 2437 type = GL_UNSIGNED_SHORT_5_6_5; 2438 intFormat = GL_RGB; 2439 } 2440 else { 2441 _mesa_problem(NULL, "Unexpected XImage format in XMesaBindTexImage"); 2442 return; 2443 } 2444 if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGBA_EXT) { 2445 intFormat = GL_RGBA; 2446 } 2447 else if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGB_EXT) { 2448 intFormat = GL_RGB; 2449 } 2450 2451 _mesa_TexImage2D(GL_TEXTURE_2D, 0, intFormat, rb->Width, rb->Height, 0, 2452 format, type, img->data); 2453 2454 if (freeImg) { 2455 XMesaDestroyImage(img); 2456 } 2457 } 2458} 2459 2460 2461 2462PUBLIC void 2463XMesaReleaseTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer) 2464{ 2465 const GLint b = xbuffer_to_renderbuffer(buffer); 2466 if (b < 0) 2467 return; 2468 2469 /* no-op for now */ 2470} 2471 2472