xm_api.c revision 32c3957991bd0e1df744d866943a8c47b2757c9e
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 */ 161static int host_byte_order( void ) 162{ 163 int i = 1; 164 char *cptr = (char *) &i; 165 return (*cptr==1) ? LSBFirst : MSBFirst; 166} 167 168 169/** 170 * Check if the X Shared Memory extension is available. 171 * Return: 0 = not available 172 * 1 = shared XImage support available 173 * 2 = shared Pixmap support available also 174 */ 175static int check_for_xshm( XMesaDisplay *display ) 176{ 177#if defined(USE_XSHM) 178 int major, minor, ignore; 179 Bool pixmaps; 180 181 if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) { 182 if (XShmQueryVersion( display, &major, &minor, &pixmaps )==True) { 183 return (pixmaps==True) ? 2 : 1; 184 } 185 else { 186 return 0; 187 } 188 } 189 else { 190 return 0; 191 } 192#else 193 /* No XSHM support */ 194 return 0; 195#endif 196} 197 198 199/** 200 * Apply gamma correction to an intensity value in [0..max]. Return the 201 * new intensity value. 202 */ 203static GLint 204gamma_adjust( GLfloat gamma, GLint value, GLint max ) 205{ 206 if (gamma == 1.0) { 207 return value; 208 } 209 else { 210 double x = (double) value / (double) max; 211 return IROUND_POS((GLfloat) max * pow(x, 1.0F/gamma)); 212 } 213} 214 215 216 217/** 218 * Return the true number of bits per pixel for XImages. 219 * For example, if we request a 24-bit deep visual we may actually need/get 220 * 32bpp XImages. This function returns the appropriate bpp. 221 * Input: dpy - the X display 222 * visinfo - desribes the visual to be used for XImages 223 * Return: true number of bits per pixel for XImages 224 */ 225static int 226bits_per_pixel( XMesaVisual xmv ) 227{ 228 XMesaDisplay *dpy = xmv->display; 229 XMesaVisualInfo visinfo = xmv->visinfo; 230 XMesaImage *img; 231 int bitsPerPixel; 232 /* Create a temporary XImage */ 233 img = XCreateImage( dpy, visinfo->visual, visinfo->depth, 234 ZPixmap, 0, /*format, offset*/ 235 (char*) MALLOC(8), /*data*/ 236 1, 1, /*width, height*/ 237 32, /*bitmap_pad*/ 238 0 /*bytes_per_line*/ 239 ); 240 assert(img); 241 /* grab the bits/pixel value */ 242 bitsPerPixel = img->bits_per_pixel; 243 /* free the XImage */ 244 free( img->data ); 245 img->data = NULL; 246 XMesaDestroyImage( img ); 247 return bitsPerPixel; 248} 249 250 251 252/* 253 * Determine if a given X window ID is valid (window exists). 254 * Do this by calling XGetWindowAttributes() for the window and 255 * checking if we catch an X error. 256 * Input: dpy - the display 257 * win - the window to check for existance 258 * Return: GL_TRUE - window exists 259 * GL_FALSE - window doesn't exist 260 */ 261static GLboolean WindowExistsFlag; 262 263static int window_exists_err_handler( XMesaDisplay* dpy, XErrorEvent* xerr ) 264{ 265 (void) dpy; 266 if (xerr->error_code == BadWindow) { 267 WindowExistsFlag = GL_FALSE; 268 } 269 return 0; 270} 271 272static GLboolean window_exists( XMesaDisplay *dpy, Window win ) 273{ 274 XWindowAttributes wa; 275 int (*old_handler)( XMesaDisplay*, XErrorEvent* ); 276 WindowExistsFlag = GL_TRUE; 277 old_handler = XSetErrorHandler(window_exists_err_handler); 278 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */ 279 XSetErrorHandler(old_handler); 280 return WindowExistsFlag; 281} 282 283static Status 284get_drawable_size( XMesaDisplay *dpy, Drawable d, GLuint *width, GLuint *height ) 285{ 286 Window root; 287 Status stat; 288 int xpos, ypos; 289 unsigned int w, h, bw, depth; 290 stat = XGetGeometry(dpy, d, &root, &xpos, &ypos, &w, &h, &bw, &depth); 291 *width = w; 292 *height = h; 293 return stat; 294} 295 296 297/** 298 * Return the size of the window (or pixmap) that corresponds to the 299 * given XMesaBuffer. 300 * \param width returns width in pixels 301 * \param height returns height in pixels 302 */ 303void 304xmesa_get_window_size(XMesaDisplay *dpy, XMesaBuffer b, 305 GLuint *width, GLuint *height) 306{ 307 Status stat; 308 309 _glthread_LOCK_MUTEX(_xmesa_lock); 310 XSync(b->xm_visual->display, 0); /* added for Chromium */ 311 stat = get_drawable_size(dpy, b->frontxrb->pixmap, width, height); 312 _glthread_UNLOCK_MUTEX(_xmesa_lock); 313 314 if (!stat) { 315 /* probably querying a window that's recently been destroyed */ 316 _mesa_warning(NULL, "XGetGeometry failed!\n"); 317 *width = *height = 1; 318 } 319} 320 321 322 323/**********************************************************************/ 324/***** Linked list of XMesaBuffers *****/ 325/**********************************************************************/ 326 327XMesaBuffer XMesaBufferList = NULL; 328 329 330/** 331 * Allocate a new XMesaBuffer object which corresponds to the given drawable. 332 * Note that XMesaBuffer is derived from struct gl_framebuffer. 333 * The new XMesaBuffer will not have any size (Width=Height=0). 334 * 335 * \param d the corresponding X drawable (window or pixmap) 336 * \param type either WINDOW, PIXMAP or PBUFFER, describing d 337 * \param vis the buffer's visual 338 * \param cmap the window's colormap, if known. 339 * \return new XMesaBuffer or NULL if any problem 340 */ 341static XMesaBuffer 342create_xmesa_buffer(XMesaDrawable d, BufferType type, 343 XMesaVisual vis, XMesaColormap cmap) 344{ 345 XMesaBuffer b; 346 347 ASSERT(type == WINDOW || type == PIXMAP || type == PBUFFER); 348 349 b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer); 350 if (!b) 351 return NULL; 352 353 b->display = vis->display; 354 b->xm_visual = vis; 355 b->type = type; 356 b->cmap = cmap; 357 358 _mesa_initialize_window_framebuffer(&b->mesa_buffer, &vis->mesa_visual); 359 b->mesa_buffer.Delete = xmesa_delete_framebuffer; 360 361 /* 362 * Front renderbuffer 363 */ 364 b->frontxrb = xmesa_new_renderbuffer(NULL, 0, vis, GL_FALSE); 365 if (!b->frontxrb) { 366 free(b); 367 return NULL; 368 } 369 b->frontxrb->Parent = b; 370 b->frontxrb->drawable = d; 371 b->frontxrb->pixmap = (XMesaPixmap) d; 372 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_FRONT_LEFT, 373 &b->frontxrb->Base); 374 375 /* 376 * Back renderbuffer 377 */ 378 if (vis->mesa_visual.doubleBufferMode) { 379 b->backxrb = xmesa_new_renderbuffer(NULL, 0, vis, GL_TRUE); 380 if (!b->backxrb) { 381 /* XXX free front xrb too */ 382 free(b); 383 return NULL; 384 } 385 b->backxrb->Parent = b; 386 /* determine back buffer implementation */ 387 b->db_mode = vis->ximage_flag ? BACK_XIMAGE : BACK_PIXMAP; 388 389 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_BACK_LEFT, 390 &b->backxrb->Base); 391 } 392 393 /* 394 * Software alpha planes 395 */ 396 if (vis->mesa_visual.alphaBits > 0 397 && vis->undithered_pf != PF_8A8B8G8R 398 && vis->undithered_pf != PF_8A8R8G8B) { 399 /* Visual has alpha, but pixel format doesn't support it. 400 * We'll use an alpha renderbuffer wrapper. 401 */ 402 b->swAlpha = GL_TRUE; 403 } 404 else { 405 b->swAlpha = GL_FALSE; 406 } 407 408 /* 409 * Other renderbuffer (depth, stencil, etc) 410 */ 411 _mesa_add_soft_renderbuffers(&b->mesa_buffer, 412 GL_FALSE, /* color */ 413 vis->mesa_visual.haveDepthBuffer, 414 vis->mesa_visual.haveStencilBuffer, 415 vis->mesa_visual.haveAccumBuffer, 416 b->swAlpha, 417 vis->mesa_visual.numAuxBuffers > 0 ); 418 419 /* GLX_EXT_texture_from_pixmap */ 420 b->TextureTarget = 0; 421 b->TextureFormat = GLX_TEXTURE_FORMAT_NONE_EXT; 422 b->TextureMipmap = 0; 423 424 /* insert buffer into linked list */ 425 b->Next = XMesaBufferList; 426 XMesaBufferList = b; 427 428 return b; 429} 430 431 432/** 433 * Find an XMesaBuffer by matching X display and colormap but NOT matching 434 * the notThis buffer. 435 */ 436XMesaBuffer 437xmesa_find_buffer(XMesaDisplay *dpy, XMesaColormap cmap, XMesaBuffer notThis) 438{ 439 XMesaBuffer b; 440 for (b=XMesaBufferList; b; b=b->Next) { 441 if (b->display==dpy && b->cmap==cmap && b!=notThis) { 442 return b; 443 } 444 } 445 return NULL; 446} 447 448 449/** 450 * Remove buffer from linked list, delete if no longer referenced. 451 */ 452static void 453xmesa_free_buffer(XMesaBuffer buffer) 454{ 455 XMesaBuffer prev = NULL, b; 456 457 for (b = XMesaBufferList; b; b = b->Next) { 458 if (b == buffer) { 459 struct gl_framebuffer *fb = &buffer->mesa_buffer; 460 461 /* unlink buffer from list */ 462 if (prev) 463 prev->Next = buffer->Next; 464 else 465 XMesaBufferList = buffer->Next; 466 467 /* mark as delete pending */ 468 fb->DeletePending = GL_TRUE; 469 470 /* Since the X window for the XMesaBuffer is going away, we don't 471 * want to dereference this pointer in the future. 472 */ 473 b->frontxrb->drawable = 0; 474 475 /* Unreference. If count = zero we'll really delete the buffer */ 476 _mesa_reference_framebuffer(&fb, NULL); 477 478 return; 479 } 480 /* continue search */ 481 prev = b; 482 } 483 /* buffer not found in XMesaBufferList */ 484 _mesa_problem(NULL,"xmesa_free_buffer() - buffer not found\n"); 485} 486 487 488/** 489 * Copy X color table stuff from one XMesaBuffer to another. 490 */ 491static void 492copy_colortable_info(XMesaBuffer dst, const XMesaBuffer src) 493{ 494 memcpy(dst->color_table, src->color_table, sizeof(src->color_table)); 495 memcpy(dst->pixel_to_r, src->pixel_to_r, sizeof(src->pixel_to_r)); 496 memcpy(dst->pixel_to_g, src->pixel_to_g, sizeof(src->pixel_to_g)); 497 memcpy(dst->pixel_to_b, src->pixel_to_b, sizeof(src->pixel_to_b)); 498 dst->num_alloced = src->num_alloced; 499 memcpy(dst->alloced_colors, src->alloced_colors, 500 sizeof(src->alloced_colors)); 501} 502 503 504 505/**********************************************************************/ 506/***** Misc Private Functions *****/ 507/**********************************************************************/ 508 509 510/** 511 * A replacement for XAllocColor. This function should never 512 * fail to allocate a color. When XAllocColor fails, we return 513 * the nearest matching color. If we have to allocate many colors 514 * this function isn't too efficient; the XQueryColors() could be 515 * done just once. 516 * Written by Michael Pichler, Brian Paul, Mark Kilgard 517 * Input: dpy - X display 518 * cmap - X colormap 519 * cmapSize - size of colormap 520 * In/Out: color - the XColor struct 521 * Output: exact - 1=exact color match, 0=closest match 522 * alloced - 1=XAlloc worked, 0=XAlloc failed 523 */ 524static void 525noFaultXAllocColor( int client, 526 XMesaDisplay *dpy, 527 XMesaColormap cmap, 528 int cmapSize, 529 XMesaColor *color, 530 int *exact, int *alloced ) 531{ 532 /* we'll try to cache ctable for better remote display performance */ 533 static Display *prevDisplay = NULL; 534 static XMesaColormap prevCmap = 0; 535 static int prevCmapSize = 0; 536 static XMesaColor *ctable = NULL; 537 XMesaColor subColor; 538 int i, bestmatch; 539 double mindist; /* 3*2^16^2 exceeds long int precision. */ 540 541 (void) client; 542 543 /* First try just using XAllocColor. */ 544 if (XAllocColor(dpy, cmap, color)) 545 { 546 *exact = 1; 547 *alloced = 1; 548 return; 549 } 550 551 /* Alloc failed, search for closest match */ 552 553 /* Retrieve color table entries. */ 554 /* XXX alloca candidate. */ 555 if (prevDisplay != dpy || prevCmap != cmap 556 || prevCmapSize != cmapSize || !ctable) { 557 /* free previously cached color table */ 558 if (ctable) 559 free(ctable); 560 /* Get the color table from X */ 561 ctable = (XMesaColor *) MALLOC(cmapSize * sizeof(XMesaColor)); 562 assert(ctable); 563 for (i = 0; i < cmapSize; i++) { 564 ctable[i].pixel = i; 565 } 566 XQueryColors(dpy, cmap, ctable, cmapSize); 567 prevDisplay = dpy; 568 prevCmap = cmap; 569 prevCmapSize = cmapSize; 570 } 571 572 /* Find best match. */ 573 bestmatch = -1; 574 mindist = 0.0; 575 for (i = 0; i < cmapSize; i++) { 576 double dr = 0.30 * ((double) color->red - (double) ctable[i].red); 577 double dg = 0.59 * ((double) color->green - (double) ctable[i].green); 578 double db = 0.11 * ((double) color->blue - (double) ctable[i].blue); 579 double dist = dr * dr + dg * dg + db * db; 580 if (bestmatch < 0 || dist < mindist) { 581 bestmatch = i; 582 mindist = dist; 583 } 584 } 585 586 /* Return result. */ 587 subColor.red = ctable[bestmatch].red; 588 subColor.green = ctable[bestmatch].green; 589 subColor.blue = ctable[bestmatch].blue; 590 /* Try to allocate the closest match color. This should only 591 * fail if the cell is read/write. Otherwise, we're incrementing 592 * the cell's reference count. 593 */ 594 if (XAllocColor(dpy, cmap, &subColor)) { 595 *alloced = 1; 596 } 597 else { 598 /* do this to work around a problem reported by Frank Ortega */ 599 subColor.pixel = (unsigned long) bestmatch; 600 subColor.red = ctable[bestmatch].red; 601 subColor.green = ctable[bestmatch].green; 602 subColor.blue = ctable[bestmatch].blue; 603 subColor.flags = DoRed | DoGreen | DoBlue; 604 *alloced = 0; 605 } 606 /* don't free table, save it for next time */ 607 608 *color = subColor; 609 *exact = 0; 610} 611 612 613 614/** 615 * Do setup for PF_GRAYSCALE pixel format. 616 * Note that buffer may be NULL. 617 */ 618static GLboolean 619setup_grayscale(int client, XMesaVisual v, 620 XMesaBuffer buffer, XMesaColormap cmap) 621{ 622 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 623 return GL_FALSE; 624 } 625 626 if (buffer) { 627 XMesaBuffer prevBuffer; 628 629 if (!cmap) { 630 return GL_FALSE; 631 } 632 633 prevBuffer = xmesa_find_buffer(v->display, cmap, buffer); 634 if (prevBuffer) { 635 /* Copy colormap stuff from previous XMesaBuffer which uses same 636 * X colormap. Do this to avoid time spent in noFaultXAllocColor. 637 */ 638 copy_colortable_info(buffer, prevBuffer); 639 } 640 else { 641 /* Allocate 256 shades of gray */ 642 int gray; 643 int colorsfailed = 0; 644 for (gray=0;gray<256;gray++) { 645 GLint r = gamma_adjust( v->RedGamma, gray, 255 ); 646 GLint g = gamma_adjust( v->GreenGamma, gray, 255 ); 647 GLint b = gamma_adjust( v->BlueGamma, gray, 255 ); 648 int exact, alloced; 649 XMesaColor xcol; 650 xcol.red = (r << 8) | r; 651 xcol.green = (g << 8) | g; 652 xcol.blue = (b << 8) | b; 653 noFaultXAllocColor( client, v->display, 654 cmap, GET_COLORMAP_SIZE(v), 655 &xcol, &exact, &alloced ); 656 if (!exact) { 657 colorsfailed++; 658 } 659 if (alloced) { 660 assert(buffer->num_alloced<256); 661 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 662 buffer->num_alloced++; 663 } 664 665 /*OLD 666 assert(gray < 576); 667 buffer->color_table[gray*3+0] = xcol.pixel; 668 buffer->color_table[gray*3+1] = xcol.pixel; 669 buffer->color_table[gray*3+2] = xcol.pixel; 670 assert(xcol.pixel < 65536); 671 buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100; 672 buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100; 673 buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100; 674 */ 675 buffer->color_table[gray] = xcol.pixel; 676 assert(xcol.pixel < 65536); 677 buffer->pixel_to_r[xcol.pixel] = gray; 678 buffer->pixel_to_g[xcol.pixel] = gray; 679 buffer->pixel_to_b[xcol.pixel] = gray; 680 } 681 682 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { 683 _mesa_warning(NULL, 684 "Note: %d out of 256 needed colors do not match exactly.\n", 685 colorsfailed ); 686 } 687 } 688 } 689 690 v->dithered_pf = PF_Grayscale; 691 v->undithered_pf = PF_Grayscale; 692 return GL_TRUE; 693} 694 695 696 697/** 698 * Setup RGB rendering for a window with a PseudoColor, StaticColor, 699 * or 8-bit TrueColor visual visual. We try to allocate a palette of 225 700 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB 701 * color. While this function was originally designed just for 8-bit 702 * visuals, it has also proven to work from 4-bit up to 16-bit visuals. 703 * Dithering code contributed by Bob Mercier. 704 */ 705static GLboolean 706setup_dithered_color(int client, XMesaVisual v, 707 XMesaBuffer buffer, XMesaColormap cmap) 708{ 709 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 710 return GL_FALSE; 711 } 712 713 if (buffer) { 714 XMesaBuffer prevBuffer; 715 716 if (!cmap) { 717 return GL_FALSE; 718 } 719 720 prevBuffer = xmesa_find_buffer(v->display, cmap, buffer); 721 if (prevBuffer) { 722 /* Copy colormap stuff from previous, matching XMesaBuffer. 723 * Do this to avoid time spent in noFaultXAllocColor. 724 */ 725 copy_colortable_info(buffer, prevBuffer); 726 } 727 else { 728 /* Allocate X colors and initialize color_table[], red_table[], etc */ 729 int r, g, b, i; 730 int colorsfailed = 0; 731 for (r = 0; r < DITH_R; r++) { 732 for (g = 0; g < DITH_G; g++) { 733 for (b = 0; b < DITH_B; b++) { 734 XMesaColor xcol; 735 int exact, alloced; 736 xcol.red =gamma_adjust(v->RedGamma, r*65535/(DITH_R-1),65535); 737 xcol.green=gamma_adjust(v->GreenGamma, g*65535/(DITH_G-1),65535); 738 xcol.blue =gamma_adjust(v->BlueGamma, b*65535/(DITH_B-1),65535); 739 noFaultXAllocColor( client, v->display, 740 cmap, GET_COLORMAP_SIZE(v), 741 &xcol, &exact, &alloced ); 742 if (!exact) { 743 colorsfailed++; 744 } 745 if (alloced) { 746 assert(buffer->num_alloced<256); 747 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 748 buffer->num_alloced++; 749 } 750 i = DITH_MIX( r, g, b ); 751 assert(i < 576); 752 buffer->color_table[i] = xcol.pixel; 753 assert(xcol.pixel < 65536); 754 buffer->pixel_to_r[xcol.pixel] = r * 255 / (DITH_R-1); 755 buffer->pixel_to_g[xcol.pixel] = g * 255 / (DITH_G-1); 756 buffer->pixel_to_b[xcol.pixel] = b * 255 / (DITH_B-1); 757 } 758 } 759 } 760 761 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { 762 _mesa_warning(NULL, 763 "Note: %d out of %d needed colors do not match exactly.\n", 764 colorsfailed, DITH_R * DITH_G * DITH_B ); 765 } 766 } 767 } 768 769 v->dithered_pf = PF_Dither; 770 v->undithered_pf = PF_Lookup; 771 return GL_TRUE; 772} 773 774 775/** 776 * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode. 777 * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer. 778 * Special dithering tables have to be initialized. 779 */ 780static void 781setup_8bit_hpcr(XMesaVisual v) 782{ 783 /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be) 784 * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined 785 * on the root window AND the colormap obtainable by XGetRGBColormaps 786 * for that atom must be set on the window. (see also tkInitWindow) 787 * If that colormap is not set, the output will look stripy. 788 */ 789 790 /* Setup color tables with gamma correction */ 791 int i; 792 double g; 793 794 g = 1.0 / v->RedGamma; 795 for (i=0; i<256; i++) { 796 GLint red = IROUND_POS(255.0 * pow( hpcr_rgbTbl[0][i]/255.0, g )); 797 v->hpcr_rgbTbl[0][i] = CLAMP( red, 16, 239 ); 798 } 799 800 g = 1.0 / v->GreenGamma; 801 for (i=0; i<256; i++) { 802 GLint green = IROUND_POS(255.0 * pow( hpcr_rgbTbl[1][i]/255.0, g )); 803 v->hpcr_rgbTbl[1][i] = CLAMP( green, 16, 239 ); 804 } 805 806 g = 1.0 / v->BlueGamma; 807 for (i=0; i<256; i++) { 808 GLint blue = IROUND_POS(255.0 * pow( hpcr_rgbTbl[2][i]/255.0, g )); 809 v->hpcr_rgbTbl[2][i] = CLAMP( blue, 32, 223 ); 810 } 811 v->undithered_pf = PF_HPCR; /* can't really disable dithering for now */ 812 v->dithered_pf = PF_HPCR; 813 814 /* which method should I use to clear */ 815 /* GL_FALSE: keep the ordinary method */ 816 /* GL_TRUE : clear with dither pattern */ 817 v->hpcr_clear_flag = _mesa_getenv("MESA_HPCR_CLEAR") ? GL_TRUE : GL_FALSE; 818 819 if (v->hpcr_clear_flag) { 820 v->hpcr_clear_pixmap = XMesaCreatePixmap(v->display, 821 DefaultRootWindow(v->display), 822 16, 2, 8); 823 v->hpcr_clear_ximage = XGetImage(v->display, v->hpcr_clear_pixmap, 824 0, 0, 16, 2, AllPlanes, ZPixmap); 825 } 826} 827 828 829/** 830 * Setup RGB rendering for a window with a True/DirectColor visual. 831 */ 832static void 833setup_truecolor(XMesaVisual v, XMesaBuffer buffer, XMesaColormap cmap) 834{ 835 unsigned long rmask, gmask, bmask; 836 (void) buffer; 837 (void) cmap; 838 839 /* Compute red multiplier (mask) and bit shift */ 840 v->rshift = 0; 841 rmask = GET_REDMASK(v); 842 while ((rmask & 1)==0) { 843 v->rshift++; 844 rmask = rmask >> 1; 845 } 846 847 /* Compute green multiplier (mask) and bit shift */ 848 v->gshift = 0; 849 gmask = GET_GREENMASK(v); 850 while ((gmask & 1)==0) { 851 v->gshift++; 852 gmask = gmask >> 1; 853 } 854 855 /* Compute blue multiplier (mask) and bit shift */ 856 v->bshift = 0; 857 bmask = GET_BLUEMASK(v); 858 while ((bmask & 1)==0) { 859 v->bshift++; 860 bmask = bmask >> 1; 861 } 862 863 /* 864 * Compute component-to-pixel lookup tables and dithering kernel 865 */ 866 { 867 static GLubyte kernel[16] = { 868 0*16, 8*16, 2*16, 10*16, 869 12*16, 4*16, 14*16, 6*16, 870 3*16, 11*16, 1*16, 9*16, 871 15*16, 7*16, 13*16, 5*16, 872 }; 873 GLint rBits = _mesa_bitcount(rmask); 874 GLint gBits = _mesa_bitcount(gmask); 875 GLint bBits = _mesa_bitcount(bmask); 876 GLint maxBits; 877 GLuint i; 878 879 /* convert pixel components in [0,_mask] to RGB values in [0,255] */ 880 for (i=0; i<=rmask; i++) 881 v->PixelToR[i] = (unsigned char) ((i * 255) / rmask); 882 for (i=0; i<=gmask; i++) 883 v->PixelToG[i] = (unsigned char) ((i * 255) / gmask); 884 for (i=0; i<=bmask; i++) 885 v->PixelToB[i] = (unsigned char) ((i * 255) / bmask); 886 887 /* convert RGB values from [0,255] to pixel components */ 888 889 for (i=0;i<256;i++) { 890 GLint r = gamma_adjust(v->RedGamma, i, 255); 891 GLint g = gamma_adjust(v->GreenGamma, i, 255); 892 GLint b = gamma_adjust(v->BlueGamma, i, 255); 893 v->RtoPixel[i] = (r >> (8-rBits)) << v->rshift; 894 v->GtoPixel[i] = (g >> (8-gBits)) << v->gshift; 895 v->BtoPixel[i] = (b >> (8-bBits)) << v->bshift; 896 } 897 /* overflow protection */ 898 for (i=256;i<512;i++) { 899 v->RtoPixel[i] = v->RtoPixel[255]; 900 v->GtoPixel[i] = v->GtoPixel[255]; 901 v->BtoPixel[i] = v->BtoPixel[255]; 902 } 903 904 /* setup dithering kernel */ 905 maxBits = rBits; 906 if (gBits > maxBits) maxBits = gBits; 907 if (bBits > maxBits) maxBits = bBits; 908 for (i=0;i<16;i++) { 909 v->Kernel[i] = kernel[i] >> maxBits; 910 } 911 912 v->undithered_pf = PF_Truecolor; 913 v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_Dither_True : PF_Truecolor; 914 } 915 916 /* 917 * Now check for TrueColor visuals which we can optimize. 918 */ 919 if ( GET_REDMASK(v) ==0x0000ff 920 && GET_GREENMASK(v)==0x00ff00 921 && GET_BLUEMASK(v) ==0xff0000 922 && CHECK_BYTE_ORDER(v) 923 && v->BitsPerPixel==32 924 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 925 /* common 32 bpp config used on SGI, Sun */ 926 v->undithered_pf = v->dithered_pf = PF_8A8B8G8R; /* ABGR */ 927 } 928 else if (GET_REDMASK(v) == 0xff0000 929 && GET_GREENMASK(v)== 0x00ff00 930 && GET_BLUEMASK(v) == 0x0000ff 931 && CHECK_BYTE_ORDER(v) 932 && v->RedGamma == 1.0 && v->GreenGamma == 1.0 && v->BlueGamma == 1.0){ 933 if (v->BitsPerPixel==32) { 934 /* if 32 bpp, and visual indicates 8 bpp alpha channel */ 935 if (GET_VISUAL_DEPTH(v) == 32 && v->mesa_visual.alphaBits == 8) 936 v->undithered_pf = v->dithered_pf = PF_8A8R8G8B; /* ARGB */ 937 else 938 v->undithered_pf = v->dithered_pf = PF_8R8G8B; /* xRGB */ 939 } 940 else if (v->BitsPerPixel == 24) { 941 v->undithered_pf = v->dithered_pf = PF_8R8G8B24; /* RGB */ 942 } 943 } 944 else if (GET_REDMASK(v) ==0xf800 945 && GET_GREENMASK(v)==0x07e0 946 && GET_BLUEMASK(v) ==0x001f 947 && CHECK_BYTE_ORDER(v) 948 && v->BitsPerPixel==16 949 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 950 /* 5-6-5 RGB */ 951 v->undithered_pf = PF_5R6G5B; 952 v->dithered_pf = PF_Dither_5R6G5B; 953 } 954 else if (GET_REDMASK(v) ==0xe0 955 && GET_GREENMASK(v)==0x1c 956 && GET_BLUEMASK(v) ==0x03 957 && CHECK_FOR_HPCR(v)) { 958 /* 8-bit HP color recovery */ 959 setup_8bit_hpcr( v ); 960 } 961} 962 963 964 965/** 966 * Setup RGB rendering for a window with a monochrome visual. 967 */ 968static void 969setup_monochrome( XMesaVisual v, XMesaBuffer b ) 970{ 971 (void) b; 972 v->dithered_pf = v->undithered_pf = PF_1Bit; 973 /* if black=1 then we must flip pixel values */ 974 v->bitFlip = (GET_BLACK_PIXEL(v) != 0); 975} 976 977 978 979/** 980 * When a context is bound for the first time, we can finally finish 981 * initializing the context's visual and buffer information. 982 * \param v the XMesaVisual to initialize 983 * \param b the XMesaBuffer to initialize (may be NULL) 984 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode 985 * \param window the window/pixmap we're rendering into 986 * \param cmap the colormap associated with the window/pixmap 987 * \return GL_TRUE=success, GL_FALSE=failure 988 */ 989static GLboolean 990initialize_visual_and_buffer(XMesaVisual v, XMesaBuffer b, 991 XMesaDrawable window, 992 XMesaColormap cmap) 993{ 994 int client = 0; 995 const int xclass = v->visualType; 996 997 998 ASSERT(!b || b->xm_visual == v); 999 1000 /* Save true bits/pixel */ 1001 v->BitsPerPixel = bits_per_pixel(v); 1002 assert(v->BitsPerPixel > 0); 1003 1004 /* RGB WINDOW: 1005 * We support RGB rendering into almost any kind of visual. 1006 */ 1007 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { 1008 setup_truecolor( v, b, cmap ); 1009 } 1010 else if (xclass == GLX_STATIC_GRAY && GET_VISUAL_DEPTH(v) == 1) { 1011 setup_monochrome( v, b ); 1012 } 1013 else if (xclass == GLX_GRAY_SCALE || xclass == GLX_STATIC_GRAY) { 1014 if (!setup_grayscale( client, v, b, cmap )) { 1015 return GL_FALSE; 1016 } 1017 } 1018 else if ((xclass == GLX_PSEUDO_COLOR || xclass == GLX_STATIC_COLOR) 1019 && GET_VISUAL_DEPTH(v)>=4 && GET_VISUAL_DEPTH(v)<=16) { 1020 if (!setup_dithered_color( client, v, b, cmap )) { 1021 return GL_FALSE; 1022 } 1023 } 1024 else { 1025 _mesa_warning(NULL, "XMesa: RGB mode rendering not supported in given visual.\n"); 1026 return GL_FALSE; 1027 } 1028 v->mesa_visual.indexBits = 0; 1029 1030 if (_mesa_getenv("MESA_NO_DITHER")) { 1031 v->dithered_pf = v->undithered_pf; 1032 } 1033 1034 1035 /* 1036 * If MESA_INFO env var is set print out some debugging info 1037 * which can help Brian figure out what's going on when a user 1038 * reports bugs. 1039 */ 1040 if (_mesa_getenv("MESA_INFO")) { 1041 printf("X/Mesa visual = %p\n", (void *) v); 1042 printf("X/Mesa dithered pf = %u\n", v->dithered_pf); 1043 printf("X/Mesa undithered pf = %u\n", v->undithered_pf); 1044 printf("X/Mesa level = %d\n", v->mesa_visual.level); 1045 printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v)); 1046 printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel); 1047 } 1048 1049 if (b && window) { 1050 char *data; 1051 1052 /* Do window-specific initializations */ 1053 1054 /* these should have been set in create_xmesa_buffer */ 1055 ASSERT(b->frontxrb->drawable == window); 1056 ASSERT(b->frontxrb->pixmap == (XMesaPixmap) window); 1057 1058 /* Setup for single/double buffering */ 1059 if (v->mesa_visual.doubleBufferMode) { 1060 /* Double buffered */ 1061 b->shm = check_for_xshm( v->display ); 1062 } 1063 1064 /* X11 graphics contexts */ 1065 b->gc = XCreateGC( v->display, window, 0, NULL ); 1066 XMesaSetFunction( v->display, b->gc, GXcopy ); 1067 1068 /* cleargc - for glClear() */ 1069 b->cleargc = XCreateGC( v->display, window, 0, NULL ); 1070 XMesaSetFunction( v->display, b->cleargc, GXcopy ); 1071 1072 /* 1073 * Don't generate Graphics Expose/NoExpose events in swapbuffers(). 1074 * Patch contributed by Michael Pichler May 15, 1995. 1075 */ 1076 { 1077 XGCValues gcvalues; 1078 gcvalues.graphics_exposures = False; 1079 b->swapgc = XCreateGC(v->display, window, 1080 GCGraphicsExposures, &gcvalues); 1081 } 1082 XMesaSetFunction( v->display, b->swapgc, GXcopy ); 1083 /* 1084 * Set fill style and tile pixmap once for all for HPCR stuff 1085 * (instead of doing it each time in clear_color_HPCR_pixmap()) 1086 * Initialize whole stuff 1087 * Patch contributed by Jacques Leroy March 8, 1998. 1088 */ 1089 if (v->hpcr_clear_flag && b->backxrb && b->backxrb->pixmap) { 1090 int i; 1091 for (i = 0; i < 16; i++) { 1092 XMesaPutPixel(v->hpcr_clear_ximage, i, 0, 0); 1093 XMesaPutPixel(v->hpcr_clear_ximage, i, 1, 0); 1094 } 1095 XMesaPutImage(b->display, (XMesaDrawable) v->hpcr_clear_pixmap, 1096 b->cleargc, v->hpcr_clear_ximage, 0, 0, 0, 0, 16, 2); 1097 XMesaSetFillStyle( v->display, b->cleargc, FillTiled); 1098 XMesaSetTile( v->display, b->cleargc, v->hpcr_clear_pixmap ); 1099 } 1100 1101 /* Initialize the row buffer XImage for use in write_color_span() */ 1102 data = (char*) MALLOC(MAX_WIDTH*4); 1103 b->rowimage = XCreateImage( v->display, 1104 v->visinfo->visual, 1105 v->visinfo->depth, 1106 ZPixmap, 0, /*format, offset*/ 1107 data, /*data*/ 1108 MAX_WIDTH, 1, /*width, height*/ 1109 32, /*bitmap_pad*/ 1110 0 /*bytes_per_line*/ ); 1111 if (!b->rowimage) 1112 return GL_FALSE; 1113 } 1114 1115 return GL_TRUE; 1116} 1117 1118 1119 1120/* 1121 * Convert an RGBA color to a pixel value. 1122 */ 1123unsigned long 1124xmesa_color_to_pixel(struct gl_context *ctx, 1125 GLubyte r, GLubyte g, GLubyte b, GLubyte a, 1126 GLuint pixelFormat) 1127{ 1128 XMesaContext xmesa = XMESA_CONTEXT(ctx); 1129 switch (pixelFormat) { 1130 case PF_Index: 1131 return 0; 1132 case PF_Truecolor: 1133 { 1134 unsigned long p; 1135 PACK_TRUECOLOR( p, r, g, b ); 1136 return p; 1137 } 1138 case PF_8A8B8G8R: 1139 return PACK_8A8B8G8R( r, g, b, a ); 1140 case PF_8A8R8G8B: 1141 return PACK_8A8R8G8B( r, g, b, a ); 1142 case PF_8R8G8B: 1143 /* fall through */ 1144 case PF_8R8G8B24: 1145 return PACK_8R8G8B( r, g, b ); 1146 case PF_5R6G5B: 1147 return PACK_5R6G5B( r, g, b ); 1148 case PF_Dither: 1149 { 1150 DITHER_SETUP; 1151 return DITHER( 1, 0, r, g, b ); 1152 } 1153 case PF_1Bit: 1154 /* 382 = (3*255)/2 */ 1155 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 1156 case PF_HPCR: 1157 return DITHER_HPCR(1, 1, r, g, b); 1158 case PF_Lookup: 1159 { 1160 LOOKUP_SETUP; 1161 return LOOKUP( r, g, b ); 1162 } 1163 case PF_Grayscale: 1164 return GRAY_RGB( r, g, b ); 1165 case PF_Dither_True: 1166 /* fall through */ 1167 case PF_Dither_5R6G5B: 1168 { 1169 unsigned long p; 1170 PACK_TRUEDITHER(p, 1, 0, r, g, b); 1171 return p; 1172 } 1173 default: 1174 _mesa_problem(ctx, "Bad pixel format in xmesa_color_to_pixel"); 1175 } 1176 return 0; 1177} 1178 1179 1180#define NUM_VISUAL_TYPES 6 1181 1182/** 1183 * Convert an X visual type to a GLX visual type. 1184 * 1185 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.) 1186 * to be converted. 1187 * \return If \c visualType is a valid X visual type, a GLX visual type will 1188 * be returned. Otherwise \c GLX_NONE will be returned. 1189 * 1190 * \note 1191 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the 1192 * DRI CVS tree. 1193 */ 1194static GLint 1195xmesa_convert_from_x_visual_type( int visualType ) 1196{ 1197 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = { 1198 GLX_STATIC_GRAY, GLX_GRAY_SCALE, 1199 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR, 1200 GLX_TRUE_COLOR, GLX_DIRECT_COLOR 1201 }; 1202 1203 return ( (unsigned) visualType < NUM_VISUAL_TYPES ) 1204 ? glx_visual_types[ visualType ] : GLX_NONE; 1205} 1206 1207 1208/**********************************************************************/ 1209/***** Public Functions *****/ 1210/**********************************************************************/ 1211 1212 1213/* 1214 * Create a new X/Mesa visual. 1215 * Input: display - X11 display 1216 * visinfo - an XVisualInfo pointer 1217 * rgb_flag - GL_TRUE = RGB mode, 1218 * GL_FALSE = color index mode 1219 * alpha_flag - alpha buffer requested? 1220 * db_flag - GL_TRUE = double-buffered, 1221 * GL_FALSE = single buffered 1222 * stereo_flag - stereo visual? 1223 * ximage_flag - GL_TRUE = use an XImage for back buffer, 1224 * GL_FALSE = use an off-screen pixmap for back buffer 1225 * depth_size - requested bits/depth values, or zero 1226 * stencil_size - requested bits/stencil values, or zero 1227 * accum_red_size - requested bits/red accum values, or zero 1228 * accum_green_size - requested bits/green accum values, or zero 1229 * accum_blue_size - requested bits/blue accum values, or zero 1230 * accum_alpha_size - requested bits/alpha accum values, or zero 1231 * num_samples - number of samples/pixel if multisampling, or zero 1232 * level - visual level, usually 0 1233 * visualCaveat - ala the GLX extension, usually GLX_NONE 1234 * Return; a new XMesaVisual or 0 if error. 1235 */ 1236PUBLIC 1237XMesaVisual XMesaCreateVisual( XMesaDisplay *display, 1238 XMesaVisualInfo visinfo, 1239 GLboolean rgb_flag, 1240 GLboolean alpha_flag, 1241 GLboolean db_flag, 1242 GLboolean stereo_flag, 1243 GLboolean ximage_flag, 1244 GLint depth_size, 1245 GLint stencil_size, 1246 GLint accum_red_size, 1247 GLint accum_green_size, 1248 GLint accum_blue_size, 1249 GLint accum_alpha_size, 1250 GLint num_samples, 1251 GLint level, 1252 GLint visualCaveat ) 1253{ 1254 char *gamma; 1255 XMesaVisual v; 1256 GLint red_bits, green_bits, blue_bits, alpha_bits; 1257 1258 /* For debugging only */ 1259 if (_mesa_getenv("MESA_XSYNC")) { 1260 /* This makes debugging X easier. 1261 * In your debugger, set a breakpoint on _XError to stop when an 1262 * X protocol error is generated. 1263 */ 1264 XSynchronize( display, 1 ); 1265 } 1266 1267 /* Color-index rendering not supported. */ 1268 if (!rgb_flag) 1269 return NULL; 1270 1271 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 1272 if (!v) { 1273 return NULL; 1274 } 1275 1276 v->display = display; 1277 1278 /* Save a copy of the XVisualInfo struct because the user may Xfree() 1279 * the struct but we may need some of the information contained in it 1280 * at a later time. 1281 */ 1282 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 1283 if(!v->visinfo) { 1284 free(v); 1285 return NULL; 1286 } 1287 memcpy(v->visinfo, visinfo, sizeof(*visinfo)); 1288 1289 /* check for MESA_GAMMA environment variable */ 1290 gamma = _mesa_getenv("MESA_GAMMA"); 1291 if (gamma) { 1292 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0; 1293 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma ); 1294 if (v->RedGamma<=0.0) v->RedGamma = 1.0; 1295 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma; 1296 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma; 1297 } 1298 else { 1299 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0; 1300 } 1301 1302 v->ximage_flag = ximage_flag; 1303 1304 v->mesa_visual.redMask = visinfo->red_mask; 1305 v->mesa_visual.greenMask = visinfo->green_mask; 1306 v->mesa_visual.blueMask = visinfo->blue_mask; 1307 v->visualID = visinfo->visualid; 1308 v->screen = visinfo->screen; 1309 1310#if !(defined(__cplusplus) || defined(c_plusplus)) 1311 v->visualType = xmesa_convert_from_x_visual_type(visinfo->class); 1312#else 1313 v->visualType = xmesa_convert_from_x_visual_type(visinfo->c_class); 1314#endif 1315 1316 v->mesa_visual.visualRating = visualCaveat; 1317 1318 if (alpha_flag) 1319 v->mesa_visual.alphaBits = 8; 1320 1321 (void) initialize_visual_and_buffer( v, NULL, 0, 0 ); 1322 1323 { 1324 const int xclass = v->visualType; 1325 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { 1326 red_bits = _mesa_bitcount(GET_REDMASK(v)); 1327 green_bits = _mesa_bitcount(GET_GREENMASK(v)); 1328 blue_bits = _mesa_bitcount(GET_BLUEMASK(v)); 1329 } 1330 else { 1331 /* this is an approximation */ 1332 int depth; 1333 depth = GET_VISUAL_DEPTH(v); 1334 red_bits = depth / 3; 1335 depth -= red_bits; 1336 green_bits = depth / 2; 1337 depth -= green_bits; 1338 blue_bits = depth; 1339 alpha_bits = 0; 1340 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) ); 1341 } 1342 alpha_bits = v->mesa_visual.alphaBits; 1343 } 1344 1345 _mesa_initialize_visual( &v->mesa_visual, 1346 db_flag, stereo_flag, 1347 red_bits, green_bits, 1348 blue_bits, alpha_bits, 1349 depth_size, 1350 stencil_size, 1351 accum_red_size, accum_green_size, 1352 accum_blue_size, accum_alpha_size, 1353 0 ); 1354 1355 /* XXX minor hack */ 1356 v->mesa_visual.level = level; 1357 return v; 1358} 1359 1360 1361PUBLIC 1362void XMesaDestroyVisual( XMesaVisual v ) 1363{ 1364 free(v->visinfo); 1365 free(v); 1366} 1367 1368 1369 1370/** 1371 * Create a new XMesaContext. 1372 * \param v the XMesaVisual 1373 * \param share_list another XMesaContext with which to share display 1374 * lists or NULL if no sharing is wanted. 1375 * \return an XMesaContext or NULL if error. 1376 */ 1377PUBLIC 1378XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) 1379{ 1380 static GLboolean firstTime = GL_TRUE; 1381 XMesaContext c; 1382 struct gl_context *mesaCtx; 1383 struct dd_function_table functions; 1384 TNLcontext *tnl; 1385 1386 if (firstTime) { 1387 _glthread_INIT_MUTEX(_xmesa_lock); 1388 firstTime = GL_FALSE; 1389 } 1390 1391 /* Note: the XMesaContext contains a Mesa struct gl_context struct (inheritance) */ 1392 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 1393 if (!c) 1394 return NULL; 1395 1396 mesaCtx = &(c->mesa); 1397 1398 /* initialize with default driver functions, then plug in XMesa funcs */ 1399 _mesa_init_driver_functions(&functions); 1400 xmesa_init_driver_functions(v, &functions); 1401 if (!_mesa_initialize_context(mesaCtx, API_OPENGL, &v->mesa_visual, 1402 share_list ? &(share_list->mesa) : (struct gl_context *) NULL, 1403 &functions, (void *) c)) { 1404 free(c); 1405 return NULL; 1406 } 1407 1408 /* Enable this to exercise fixed function -> shader translation 1409 * with software rendering. 1410 */ 1411 if (0) { 1412 mesaCtx->VertexProgram._MaintainTnlProgram = GL_TRUE; 1413 mesaCtx->FragmentProgram._MaintainTexEnvProgram = GL_TRUE; 1414 } 1415 1416 _mesa_enable_sw_extensions(mesaCtx); 1417 _mesa_enable_1_3_extensions(mesaCtx); 1418 _mesa_enable_1_4_extensions(mesaCtx); 1419 _mesa_enable_1_5_extensions(mesaCtx); 1420 _mesa_enable_2_0_extensions(mesaCtx); 1421 _mesa_enable_2_1_extensions(mesaCtx); 1422#if ENABLE_EXT_texure_compression_s3tc 1423 if (mesaCtx->Mesa_DXTn) { 1424 _mesa_enable_extension(mesaCtx, "GL_EXT_texture_compression_s3tc"); 1425 _mesa_enable_extension(mesaCtx, "GL_S3_s3tc"); 1426 } 1427 _mesa_enable_extension(mesaCtx, "GL_3DFX_texture_compression_FXT1"); 1428#endif 1429#if ENABLE_EXT_timer_query 1430 _mesa_enable_extension(mesaCtx, "GL_EXT_timer_query"); 1431#endif 1432 1433 1434 /* finish up xmesa context initializations */ 1435 c->swapbytes = CHECK_BYTE_ORDER(v) ? GL_FALSE : GL_TRUE; 1436 c->xm_visual = v; 1437 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ 1438 c->display = v->display; 1439 c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */ 1440 1441 /* Initialize the software rasterizer and helper modules. 1442 */ 1443 if (!_swrast_CreateContext( mesaCtx ) || 1444 !_vbo_CreateContext( mesaCtx ) || 1445 !_tnl_CreateContext( mesaCtx ) || 1446 !_swsetup_CreateContext( mesaCtx )) { 1447 _mesa_free_context_data(&c->mesa); 1448 free(c); 1449 return NULL; 1450 } 1451 1452 /* tnl setup */ 1453 tnl = TNL_CONTEXT(mesaCtx); 1454 tnl->Driver.RunPipeline = _tnl_run_pipeline; 1455 /* swrast setup */ 1456 xmesa_register_swrast_functions( mesaCtx ); 1457 _swsetup_Wakeup(mesaCtx); 1458 1459 _mesa_meta_init(mesaCtx); 1460 1461 return c; 1462} 1463 1464 1465 1466PUBLIC 1467void XMesaDestroyContext( XMesaContext c ) 1468{ 1469 struct gl_context *mesaCtx = &c->mesa; 1470 1471 _mesa_meta_free( mesaCtx ); 1472 1473 _swsetup_DestroyContext( mesaCtx ); 1474 _swrast_DestroyContext( mesaCtx ); 1475 _tnl_DestroyContext( mesaCtx ); 1476 _vbo_DestroyContext( mesaCtx ); 1477 _mesa_free_context_data( mesaCtx ); 1478 free( c ); 1479} 1480 1481 1482 1483/** 1484 * Private function for creating an XMesaBuffer which corresponds to an 1485 * X window or pixmap. 1486 * \param v the window's XMesaVisual 1487 * \param w the window we're wrapping 1488 * \return new XMesaBuffer or NULL if error 1489 */ 1490PUBLIC XMesaBuffer 1491XMesaCreateWindowBuffer(XMesaVisual v, XMesaWindow w) 1492{ 1493 XWindowAttributes attr; 1494 XMesaBuffer b; 1495 XMesaColormap cmap; 1496 int depth; 1497 1498 assert(v); 1499 assert(w); 1500 1501 /* Check that window depth matches visual depth */ 1502 XGetWindowAttributes( v->display, w, &attr ); 1503 depth = attr.depth; 1504 if (GET_VISUAL_DEPTH(v) != depth) { 1505 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n", 1506 GET_VISUAL_DEPTH(v), depth); 1507 return NULL; 1508 } 1509 1510 /* Find colormap */ 1511 if (attr.colormap) { 1512 cmap = attr.colormap; 1513 } 1514 else { 1515 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w); 1516 /* this is weird, a window w/out a colormap!? */ 1517 /* OK, let's just allocate a new one and hope for the best */ 1518 cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 1519 } 1520 1521 b = create_xmesa_buffer((XMesaDrawable) w, WINDOW, v, cmap); 1522 if (!b) 1523 return NULL; 1524 1525 if (!initialize_visual_and_buffer( v, b, (XMesaDrawable) w, cmap )) { 1526 xmesa_free_buffer(b); 1527 return NULL; 1528 } 1529 1530 return b; 1531} 1532 1533 1534 1535/** 1536 * Create a new XMesaBuffer from an X pixmap. 1537 * 1538 * \param v the XMesaVisual 1539 * \param p the pixmap 1540 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or 1541 * \c GLX_DIRECT_COLOR visual for the pixmap 1542 * \returns new XMesaBuffer or NULL if error 1543 */ 1544PUBLIC XMesaBuffer 1545XMesaCreatePixmapBuffer(XMesaVisual v, XMesaPixmap p, XMesaColormap cmap) 1546{ 1547 XMesaBuffer b; 1548 1549 assert(v); 1550 1551 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap); 1552 if (!b) 1553 return NULL; 1554 1555 if (!initialize_visual_and_buffer(v, b, (XMesaDrawable) p, cmap)) { 1556 xmesa_free_buffer(b); 1557 return NULL; 1558 } 1559 1560 return b; 1561} 1562 1563 1564/** 1565 * For GLX_EXT_texture_from_pixmap 1566 */ 1567XMesaBuffer 1568XMesaCreatePixmapTextureBuffer(XMesaVisual v, XMesaPixmap p, 1569 XMesaColormap cmap, 1570 int format, int target, int mipmap) 1571{ 1572 GET_CURRENT_CONTEXT(ctx); 1573 XMesaBuffer b; 1574 GLuint width, height; 1575 1576 assert(v); 1577 1578 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap); 1579 if (!b) 1580 return NULL; 1581 1582 /* get pixmap size, update framebuffer/renderbuffer dims */ 1583 xmesa_get_window_size(v->display, b, &width, &height); 1584 _mesa_resize_framebuffer(NULL, &(b->mesa_buffer), width, height); 1585 1586 if (target == 0) { 1587 /* examine dims */ 1588 if (ctx->Extensions.ARB_texture_non_power_of_two) { 1589 target = GLX_TEXTURE_2D_EXT; 1590 } 1591 else if ( _mesa_bitcount(width) == 1 1592 && _mesa_bitcount(height) == 1) { 1593 /* power of two size */ 1594 if (height == 1) { 1595 target = GLX_TEXTURE_1D_EXT; 1596 } 1597 else { 1598 target = GLX_TEXTURE_2D_EXT; 1599 } 1600 } 1601 else if (ctx->Extensions.NV_texture_rectangle) { 1602 target = GLX_TEXTURE_RECTANGLE_EXT; 1603 } 1604 else { 1605 /* non power of two textures not supported */ 1606 XMesaDestroyBuffer(b); 1607 return 0; 1608 } 1609 } 1610 1611 b->TextureTarget = target; 1612 b->TextureFormat = format; 1613 b->TextureMipmap = mipmap; 1614 1615 if (!initialize_visual_and_buffer(v, b, (XMesaDrawable) p, cmap)) { 1616 xmesa_free_buffer(b); 1617 return NULL; 1618 } 1619 1620 return b; 1621} 1622 1623 1624 1625XMesaBuffer 1626XMesaCreatePBuffer(XMesaVisual v, XMesaColormap cmap, 1627 unsigned int width, unsigned int height) 1628{ 1629 XMesaWindow root; 1630 XMesaDrawable drawable; /* X Pixmap Drawable */ 1631 XMesaBuffer b; 1632 1633 /* allocate pixmap for front buffer */ 1634 root = RootWindow( v->display, v->visinfo->screen ); 1635 drawable = XCreatePixmap(v->display, root, width, height, 1636 v->visinfo->depth); 1637 if (!drawable) 1638 return NULL; 1639 1640 b = create_xmesa_buffer(drawable, PBUFFER, v, cmap); 1641 if (!b) 1642 return NULL; 1643 1644 if (!initialize_visual_and_buffer(v, b, drawable, cmap)) { 1645 xmesa_free_buffer(b); 1646 return NULL; 1647 } 1648 1649 return b; 1650} 1651 1652 1653 1654/* 1655 * Deallocate an XMesaBuffer structure and all related info. 1656 */ 1657PUBLIC void 1658XMesaDestroyBuffer(XMesaBuffer b) 1659{ 1660 xmesa_free_buffer(b); 1661} 1662 1663 1664/** 1665 * Query the current window size and update the corresponding struct gl_framebuffer 1666 * and all attached renderbuffers. 1667 * Called when: 1668 * 1. the first time a buffer is bound to a context. 1669 * 2. from glViewport to poll for window size changes 1670 * 3. from the XMesaResizeBuffers() API function. 1671 * Note: it's possible (and legal) for xmctx to be NULL. That can happen 1672 * when resizing a buffer when no rendering context is bound. 1673 */ 1674void 1675xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer) 1676{ 1677 GLuint width, height; 1678 xmesa_get_window_size(drawBuffer->display, drawBuffer, &width, &height); 1679 if (drawBuffer->mesa_buffer.Width != width || 1680 drawBuffer->mesa_buffer.Height != height) { 1681 struct gl_context *ctx = xmctx ? &xmctx->mesa : NULL; 1682 _mesa_resize_framebuffer(ctx, &(drawBuffer->mesa_buffer), width, height); 1683 } 1684 drawBuffer->mesa_buffer.Initialized = GL_TRUE; /* XXX TEMPORARY? */ 1685} 1686 1687 1688/* 1689 * Bind buffer b to context c and make c the current rendering context. 1690 */ 1691GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b ) 1692{ 1693 return XMesaMakeCurrent2( c, b, b ); 1694} 1695 1696 1697/* 1698 * Bind buffer b to context c and make c the current rendering context. 1699 */ 1700PUBLIC 1701GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, 1702 XMesaBuffer readBuffer ) 1703{ 1704 if (c) { 1705 if (!drawBuffer || !readBuffer) 1706 return GL_FALSE; /* must specify buffers! */ 1707 1708 if (&(c->mesa) == _mesa_get_current_context() 1709 && c->mesa.DrawBuffer == &drawBuffer->mesa_buffer 1710 && c->mesa.ReadBuffer == &readBuffer->mesa_buffer 1711 && XMESA_BUFFER(c->mesa.DrawBuffer)->wasCurrent) { 1712 /* same context and buffer, do nothing */ 1713 return GL_TRUE; 1714 } 1715 1716 c->xm_buffer = drawBuffer; 1717 1718 /* Call this periodically to detect when the user has begun using 1719 * GL rendering from multiple threads. 1720 */ 1721 _glapi_check_multithread(); 1722 1723 xmesa_check_and_update_buffer_size(c, drawBuffer); 1724 if (readBuffer != drawBuffer) 1725 xmesa_check_and_update_buffer_size(c, readBuffer); 1726 1727 _mesa_make_current(&(c->mesa), 1728 &drawBuffer->mesa_buffer, 1729 &readBuffer->mesa_buffer); 1730 1731 /* 1732 * Must recompute and set these pixel values because colormap 1733 * can be different for different windows. 1734 */ 1735 c->clearpixel = xmesa_color_to_pixel( &c->mesa, 1736 c->clearcolor[0], 1737 c->clearcolor[1], 1738 c->clearcolor[2], 1739 c->clearcolor[3], 1740 c->xm_visual->undithered_pf); 1741 XMesaSetForeground(c->display, drawBuffer->cleargc, c->clearpixel); 1742 1743 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 1744 drawBuffer->wasCurrent = GL_TRUE; 1745 } 1746 else { 1747 /* Detach */ 1748 _mesa_make_current( NULL, NULL, NULL ); 1749 } 1750 return GL_TRUE; 1751} 1752 1753 1754/* 1755 * Unbind the context c from its buffer. 1756 */ 1757GLboolean XMesaUnbindContext( XMesaContext c ) 1758{ 1759 /* A no-op for XFree86 integration purposes */ 1760 return GL_TRUE; 1761} 1762 1763 1764XMesaContext XMesaGetCurrentContext( void ) 1765{ 1766 GET_CURRENT_CONTEXT(ctx); 1767 if (ctx) { 1768 XMesaContext xmesa = XMESA_CONTEXT(ctx); 1769 return xmesa; 1770 } 1771 else { 1772 return 0; 1773 } 1774} 1775 1776 1777XMesaBuffer XMesaGetCurrentBuffer( void ) 1778{ 1779 GET_CURRENT_CONTEXT(ctx); 1780 if (ctx) { 1781 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer); 1782 return xmbuf; 1783 } 1784 else { 1785 return 0; 1786 } 1787} 1788 1789 1790/* New in Mesa 3.1 */ 1791XMesaBuffer XMesaGetCurrentReadBuffer( void ) 1792{ 1793 GET_CURRENT_CONTEXT(ctx); 1794 if (ctx) { 1795 return XMESA_BUFFER(ctx->ReadBuffer); 1796 } 1797 else { 1798 return 0; 1799 } 1800} 1801 1802 1803 1804GLboolean XMesaSetFXmode( GLint mode ) 1805{ 1806 (void) mode; 1807 return GL_FALSE; 1808} 1809 1810 1811 1812/* 1813 * Copy the back buffer to the front buffer. If there's no back buffer 1814 * this is a no-op. 1815 */ 1816PUBLIC 1817void XMesaSwapBuffers( XMesaBuffer b ) 1818{ 1819 GET_CURRENT_CONTEXT(ctx); 1820 1821 if (!b->backxrb) { 1822 /* single buffered */ 1823 return; 1824 } 1825 1826 /* If we're swapping the buffer associated with the current context 1827 * we have to flush any pending rendering commands first. 1828 */ 1829 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 1830 _mesa_notifySwapBuffers(ctx); 1831 1832 if (b->db_mode) { 1833 if (b->backxrb->ximage) { 1834 /* Copy Ximage (back buf) from client memory to server window */ 1835#if defined(USE_XSHM) 1836 if (b->shm) { 1837 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 1838 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable, 1839 b->swapgc, 1840 b->backxrb->ximage, 0, 0, 1841 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height, 1842 False ); 1843 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 1844 } 1845 else 1846#endif 1847 { 1848 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 1849 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable, 1850 b->swapgc, 1851 b->backxrb->ximage, 0, 0, 1852 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height ); 1853 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 1854 } 1855 } 1856 else if (b->backxrb->pixmap) { 1857 /* Copy pixmap (back buf) to window (front buf) on server */ 1858 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 1859 XMesaCopyArea( b->xm_visual->display, 1860 b->backxrb->pixmap, /* source drawable */ 1861 b->frontxrb->drawable, /* dest. drawable */ 1862 b->swapgc, 1863 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height, 1864 0, 0 /* dest region */ 1865 ); 1866 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 1867 } 1868 1869 if (b->swAlpha) 1870 _mesa_copy_soft_alpha_renderbuffers(ctx, &b->mesa_buffer); 1871 } 1872 XSync( b->xm_visual->display, False ); 1873} 1874 1875 1876 1877/* 1878 * Copy sub-region of back buffer to front buffer 1879 */ 1880void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 1881{ 1882 GET_CURRENT_CONTEXT(ctx); 1883 1884 /* If we're swapping the buffer associated with the current context 1885 * we have to flush any pending rendering commands first. 1886 */ 1887 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 1888 _mesa_notifySwapBuffers(ctx); 1889 1890 if (!b->backxrb) { 1891 /* single buffered */ 1892 return; 1893 } 1894 1895 if (b->db_mode) { 1896 int yTop = b->mesa_buffer.Height - y - height; 1897 if (b->backxrb->ximage) { 1898 /* Copy Ximage from host's memory to server's window */ 1899#if defined(USE_XSHM) 1900 if (b->shm) { 1901 /* XXX assuming width and height aren't too large! */ 1902 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable, 1903 b->swapgc, 1904 b->backxrb->ximage, x, yTop, 1905 x, yTop, width, height, False ); 1906 /* wait for finished event??? */ 1907 } 1908 else 1909#endif 1910 { 1911 /* XXX assuming width and height aren't too large! */ 1912 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable, 1913 b->swapgc, 1914 b->backxrb->ximage, x, yTop, 1915 x, yTop, width, height ); 1916 } 1917 } 1918 else { 1919 /* Copy pixmap to window on server */ 1920 XMesaCopyArea( b->xm_visual->display, 1921 b->backxrb->pixmap, /* source drawable */ 1922 b->frontxrb->drawable, /* dest. drawable */ 1923 b->swapgc, 1924 x, yTop, width, height, /* source region */ 1925 x, yTop /* dest region */ 1926 ); 1927 } 1928 } 1929} 1930 1931 1932/* 1933 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function 1934 * is a way to get "under the hood" of X/Mesa so one can manipulate the 1935 * back buffer directly. 1936 * Output: pixmap - pointer to back buffer's Pixmap, or 0 1937 * ximage - pointer to back buffer's XImage, or NULL 1938 * Return: GL_TRUE = context is double buffered 1939 * GL_FALSE = context is single buffered 1940 */ 1941GLboolean XMesaGetBackBuffer( XMesaBuffer b, 1942 XMesaPixmap *pixmap, 1943 XMesaImage **ximage ) 1944{ 1945 if (b->db_mode) { 1946 if (pixmap) 1947 *pixmap = b->backxrb->pixmap; 1948 if (ximage) 1949 *ximage = b->backxrb->ximage; 1950 return GL_TRUE; 1951 } 1952 else { 1953 *pixmap = 0; 1954 *ximage = NULL; 1955 return GL_FALSE; 1956 } 1957} 1958 1959 1960/* 1961 * Return the depth buffer associated with an XMesaBuffer. 1962 * Input: b - the XMesa buffer handle 1963 * Output: width, height - size of buffer in pixels 1964 * bytesPerValue - bytes per depth value (2 or 4) 1965 * buffer - pointer to depth buffer values 1966 * Return: GL_TRUE or GL_FALSE to indicate success or failure. 1967 */ 1968GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height, 1969 GLint *bytesPerValue, void **buffer ) 1970{ 1971 struct gl_renderbuffer *rb 1972 = b->mesa_buffer.Attachment[BUFFER_DEPTH].Renderbuffer; 1973 if (!rb || !rb->Data) { 1974 *width = 0; 1975 *height = 0; 1976 *bytesPerValue = 0; 1977 *buffer = 0; 1978 return GL_FALSE; 1979 } 1980 else { 1981 *width = b->mesa_buffer.Width; 1982 *height = b->mesa_buffer.Height; 1983 *bytesPerValue = b->mesa_buffer.Visual.depthBits <= 16 1984 ? sizeof(GLushort) : sizeof(GLuint); 1985 *buffer = rb->Data; 1986 return GL_TRUE; 1987 } 1988} 1989 1990 1991void XMesaFlush( XMesaContext c ) 1992{ 1993 if (c && c->xm_visual) { 1994 XSync( c->xm_visual->display, False ); 1995 } 1996} 1997 1998 1999 2000const char *XMesaGetString( XMesaContext c, int name ) 2001{ 2002 (void) c; 2003 if (name==XMESA_VERSION) { 2004 return "5.0"; 2005 } 2006 else if (name==XMESA_EXTENSIONS) { 2007 return ""; 2008 } 2009 else { 2010 return NULL; 2011 } 2012} 2013 2014 2015 2016XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d ) 2017{ 2018 XMesaBuffer b; 2019 for (b=XMesaBufferList; b; b=b->Next) { 2020 if (b->frontxrb->drawable == d && b->display == dpy) { 2021 return b; 2022 } 2023 } 2024 return NULL; 2025} 2026 2027 2028/** 2029 * Free/destroy all XMesaBuffers associated with given display. 2030 */ 2031void xmesa_destroy_buffers_on_display(XMesaDisplay *dpy) 2032{ 2033 XMesaBuffer b, next; 2034 for (b = XMesaBufferList; b; b = next) { 2035 next = b->Next; 2036 if (b->display == dpy) { 2037 xmesa_free_buffer(b); 2038 } 2039 } 2040} 2041 2042 2043/* 2044 * Look for XMesaBuffers whose X window has been destroyed. 2045 * Deallocate any such XMesaBuffers. 2046 */ 2047void XMesaGarbageCollect( XMesaDisplay* dpy ) 2048{ 2049 XMesaBuffer b, next; 2050 for (b=XMesaBufferList; b; b=next) { 2051 next = b->Next; 2052 if (b->display && b->display == dpy && b->frontxrb->drawable && b->type == WINDOW) { 2053 XSync(b->display, False); 2054 if (!window_exists( b->display, b->frontxrb->drawable )) { 2055 /* found a dead window, free the ancillary info */ 2056 XMesaDestroyBuffer( b ); 2057 } 2058 } 2059 } 2060} 2061 2062 2063unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y, 2064 GLfloat red, GLfloat green, 2065 GLfloat blue, GLfloat alpha ) 2066{ 2067 struct gl_context *ctx = &xmesa->mesa; 2068 GLint r = (GLint) (red * 255.0F); 2069 GLint g = (GLint) (green * 255.0F); 2070 GLint b = (GLint) (blue * 255.0F); 2071 GLint a = (GLint) (alpha * 255.0F); 2072 2073 switch (xmesa->pixelformat) { 2074 case PF_Index: 2075 return 0; 2076 case PF_Truecolor: 2077 { 2078 unsigned long p; 2079 PACK_TRUECOLOR( p, r, g, b ); 2080 return p; 2081 } 2082 case PF_8A8B8G8R: 2083 return PACK_8A8B8G8R( r, g, b, a ); 2084 case PF_8A8R8G8B: 2085 return PACK_8A8R8G8B( r, g, b, a ); 2086 case PF_8R8G8B: 2087 return PACK_8R8G8B( r, g, b ); 2088 case PF_5R6G5B: 2089 return PACK_5R6G5B( r, g, b ); 2090 case PF_Dither: 2091 { 2092 DITHER_SETUP; 2093 return DITHER( x, y, r, g, b ); 2094 } 2095 case PF_1Bit: 2096 /* 382 = (3*255)/2 */ 2097 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 2098 case PF_HPCR: 2099 return DITHER_HPCR(x, y, r, g, b); 2100 case PF_Lookup: 2101 { 2102 LOOKUP_SETUP; 2103 return LOOKUP( r, g, b ); 2104 } 2105 case PF_Grayscale: 2106 return GRAY_RGB( r, g, b ); 2107 case PF_Dither_5R6G5B: 2108 /* fall through */ 2109 case PF_Dither_True: 2110 { 2111 unsigned long p; 2112 PACK_TRUEDITHER(p, x, y, r, g, b); 2113 return p; 2114 } 2115 default: 2116 _mesa_problem(NULL, "Bad pixel format in XMesaDitherColor"); 2117 } 2118 return 0; 2119} 2120 2121 2122/* 2123 * This is typically called when the window size changes and we need 2124 * to reallocate the buffer's back/depth/stencil/accum buffers. 2125 */ 2126PUBLIC void 2127XMesaResizeBuffers( XMesaBuffer b ) 2128{ 2129 GET_CURRENT_CONTEXT(ctx); 2130 XMesaContext xmctx = XMESA_CONTEXT(ctx); 2131 if (!xmctx) 2132 return; 2133 xmesa_check_and_update_buffer_size(xmctx, b); 2134} 2135 2136 2137static GLint 2138xbuffer_to_renderbuffer(int buffer) 2139{ 2140 assert(MAX_AUX_BUFFERS <= 4); 2141 2142 switch (buffer) { 2143 case GLX_FRONT_LEFT_EXT: 2144 return BUFFER_FRONT_LEFT; 2145 case GLX_FRONT_RIGHT_EXT: 2146 return BUFFER_FRONT_RIGHT; 2147 case GLX_BACK_LEFT_EXT: 2148 return BUFFER_BACK_LEFT; 2149 case GLX_BACK_RIGHT_EXT: 2150 return BUFFER_BACK_RIGHT; 2151 case GLX_AUX0_EXT: 2152 return BUFFER_AUX0; 2153 case GLX_AUX1_EXT: 2154 case GLX_AUX2_EXT: 2155 case GLX_AUX3_EXT: 2156 case GLX_AUX4_EXT: 2157 case GLX_AUX5_EXT: 2158 case GLX_AUX6_EXT: 2159 case GLX_AUX7_EXT: 2160 case GLX_AUX8_EXT: 2161 case GLX_AUX9_EXT: 2162 default: 2163 /* BadValue error */ 2164 return -1; 2165 } 2166} 2167 2168 2169PUBLIC void 2170XMesaBindTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer, 2171 const int *attrib_list) 2172{ 2173#if 0 2174 GET_CURRENT_CONTEXT(ctx); 2175 const GLuint unit = ctx->Texture.CurrentUnit; 2176 struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit]; 2177 struct gl_texture_object *texObj; 2178#endif 2179 struct gl_renderbuffer *rb; 2180 struct xmesa_renderbuffer *xrb; 2181 GLint b; 2182 XMesaImage *img = NULL; 2183 GLboolean freeImg = GL_FALSE; 2184 2185 b = xbuffer_to_renderbuffer(buffer); 2186 if (b < 0) 2187 return; 2188 2189 if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_NONE_EXT) 2190 return; /* BadMatch error */ 2191 2192 rb = drawable->mesa_buffer.Attachment[b].Renderbuffer; 2193 if (!rb) { 2194 /* invalid buffer */ 2195 return; 2196 } 2197 xrb = xmesa_renderbuffer(rb); 2198 2199#if 0 2200 switch (drawable->TextureTarget) { 2201 case GLX_TEXTURE_1D_EXT: 2202 texObj = texUnit->CurrentTex[TEXTURE_1D_INDEX]; 2203 break; 2204 case GLX_TEXTURE_2D_EXT: 2205 texObj = texUnit->CurrentTex[TEXTURE_2D_INDEX]; 2206 break; 2207 case GLX_TEXTURE_RECTANGLE_EXT: 2208 texObj = texUnit->CurrentTex[TEXTURE_RECT_INDEX]; 2209 break; 2210 default: 2211 return; /* BadMatch error */ 2212 } 2213#endif 2214 2215 /* 2216 * The following is a quick and simple way to implement 2217 * BindTexImage. The better way is to write some new FetchTexel() 2218 * functions which would extract texels from XImages. We'd still 2219 * need to use GetImage when texturing from a Pixmap (front buffer) 2220 * but texturing from a back buffer (XImage) would avoid an image 2221 * copy. 2222 */ 2223 2224 /* get XImage */ 2225 if (xrb->pixmap) { 2226 img = XMesaGetImage(dpy, xrb->pixmap, 0, 0, rb->Width, rb->Height, ~0L, 2227 ZPixmap); 2228 freeImg = GL_TRUE; 2229 } 2230 else if (xrb->ximage) { 2231 img = xrb->ximage; 2232 } 2233 2234 /* store the XImage as a new texture image */ 2235 if (img) { 2236 GLenum format, type, intFormat; 2237 if (img->bits_per_pixel == 32) { 2238 format = GL_BGRA; 2239 type = GL_UNSIGNED_BYTE; 2240 intFormat = GL_RGBA; 2241 } 2242 else if (img->bits_per_pixel == 24) { 2243 format = GL_BGR; 2244 type = GL_UNSIGNED_BYTE; 2245 intFormat = GL_RGB; 2246 } 2247 else if (img->bits_per_pixel == 16) { 2248 format = GL_BGR; 2249 type = GL_UNSIGNED_SHORT_5_6_5; 2250 intFormat = GL_RGB; 2251 } 2252 else { 2253 _mesa_problem(NULL, "Unexpected XImage format in XMesaBindTexImage"); 2254 return; 2255 } 2256 if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGBA_EXT) { 2257 intFormat = GL_RGBA; 2258 } 2259 else if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGB_EXT) { 2260 intFormat = GL_RGB; 2261 } 2262 2263 _mesa_TexImage2D(GL_TEXTURE_2D, 0, intFormat, rb->Width, rb->Height, 0, 2264 format, type, img->data); 2265 2266 if (freeImg) { 2267 XMesaDestroyImage(img); 2268 } 2269 } 2270} 2271 2272 2273 2274PUBLIC void 2275XMesaReleaseTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer) 2276{ 2277 const GLint b = xbuffer_to_renderbuffer(buffer); 2278 if (b < 0) 2279 return; 2280 2281 /* no-op for now */ 2282} 2283 2284