xm_api.c revision 23caf20169ac38436ee9c13914f1d6aa7cf6bb5e
1a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)/* $Id: xm_api.c,v 1.8 2000/11/16 21:05:40 keithw Exp $ */ 2a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 3a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)/* 4a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * Mesa 3-D graphics library 5a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * Version: 3.3 6a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * 7a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * Copyright (C) 1999-2000 Brian Paul All Rights Reserved. 8a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * 9a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * Permission is hereby granted, free of charge, to any person obtaining a 10a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * copy of this software and associated documentation files (the "Software"), 11a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * to deal in the Software without restriction, including without limitation 12a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * the rights to use, copy, modify, merge, publish, distribute, sublicense, 13a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * and/or sell copies of the Software, and to permit persons to whom the 14a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * Software is furnished to do so, subject to the following conditions: 15a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * 16a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * The above copyright notice and this permission notice shall be included 17a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * in all copies or substantial portions of the Software. 18a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * 19a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 20a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 21a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 22a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN 23a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 24a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 25a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) */ 26a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 27a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 28a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)/* 29a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * This file contains the implementations of all the XMesa* functions. 30a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * 31a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * 32a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * NOTES: 33a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * 34a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * The window coordinate system origin (0,0) is in the lower-left corner 35a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * of the window. X11's window coordinate origin is in the upper-left 36a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * corner of the window. Therefore, most drawing functions in this 37a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * file have to flip Y coordinates. 38a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * 39a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * Define USE_XSHM in the Makefile with -DUSE_XSHM if you want to compile 40a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * in support for the MIT Shared Memory extension. If enabled, when you 41a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * use an Ximage for the back buffer in double buffered mode, the "swap" 42a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * operation will be faster. You must also link with -lXext. 43a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * 44a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * Byte swapping: If the Mesa host and the X display use a different 45a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * byte order then there's some trickiness to be aware of when using 46a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * XImages. The byte ordering used for the XImage is that of the X 47a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * display, not the Mesa host. 48a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * The color-to-pixel encoding for True/DirectColor must be done 49a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * according to the display's visual red_mask, green_mask, and blue_mask. 50a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * If XPutPixel is used to put a pixel into an XImage then XPutPixel will 51a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * do byte swapping if needed. If one wants to directly "poke" the pixel 52a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * into the XImage's buffer then the pixel must be byte swapped first. In 53a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * Mesa, when byte swapping is needed we use the PF_TRUECOLOR pixel format 54a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * and use XPutPixel everywhere except in the implementation of 55a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * glClear(GL_COLOR_BUFFER_BIT). We want this function to be fast so 56a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * instead of using XPutPixel we "poke" our values after byte-swapping 57a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * the clear pixel value if needed. 58a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * 59a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) */ 60a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 61a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#ifdef __CYGWIN__ 62a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#undef WIN32 63a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#undef __WIN32__ 64a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#endif 65a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 66a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "glxheader.h" 67a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "GL/xmesa.h" 68a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "xmesaP.h" 69a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "context.h" 70a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "extensions.h" 71a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "glthread.h" 72a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "matrix.h" 73a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "mem.h" 74a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "types.h" 75a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#ifdef HAVE_CONFIG_H 76a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "conf.h" 77a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#endif 78a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "macros.h" 79a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "swrast/swrast.h" 80a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "swrast_setup/swrast_setup.h" 81a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "tnl/tnl.h" 82a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 83a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#ifndef GLX_NONE_EXT 84a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#define GLX_NONE_EXT 0x8000 85a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#endif 86a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 87a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 88a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)/* 89a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * Global X driver lock 90a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) */ 91a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)_glthread_Mutex _xmesa_lock; 92a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 93a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 94a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 95a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)/* 96a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) * Lookup tables for HPCR pixel format: 97a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) */ 98a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)static short hpcr_rgbTbl[3][256] = { 99a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles){ 100a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 101a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 102a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 103a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 104a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 105a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 106a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 107a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 108a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 109a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 110a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 111a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 112a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 113a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 114a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 115a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 116a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)}, 117a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles){ 118 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 119 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 120 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 121 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 122 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 123 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 124 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 125 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 126112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 127128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 128144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 129160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 130176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 131192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 132208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 133224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 134}, 135{ 136 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 137 40, 40, 41, 41, 42, 42, 43, 43, 44, 44, 45, 45, 46, 46, 47, 47, 138 48, 48, 49, 49, 50, 50, 51, 51, 52, 52, 53, 53, 54, 54, 55, 55, 139 56, 56, 57, 57, 58, 58, 59, 59, 60, 60, 61, 61, 62, 62, 63, 63, 140 64, 64, 65, 65, 66, 66, 67, 67, 68, 68, 69, 69, 70, 70, 71, 71, 141 72, 72, 73, 73, 74, 74, 75, 75, 76, 76, 77, 77, 78, 78, 79, 79, 142 80, 80, 81, 81, 82, 82, 83, 83, 84, 84, 85, 85, 86, 86, 87, 87, 143 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 144 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 145112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 146128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 147144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 148160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 149176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 150192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 151208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223 152} 153}; 154 155 156 157/**********************************************************************/ 158/***** X Utility Functions *****/ 159/**********************************************************************/ 160 161 162/* 163 * X/Mesa error reporting function: 164 */ 165static void error( const char *msg ) 166{ 167 if (getenv("MESA_DEBUG")) 168 fprintf( stderr, "X/Mesa error: %s\n", msg ); 169} 170 171 172/* 173 * Return the host's byte order as LSBFirst or MSBFirst ala X. 174 */ 175#ifndef XFree86Server 176static int host_byte_order( void ) 177{ 178 int i = 1; 179 char *cptr = (char *) &i; 180 return (*cptr==1) ? LSBFirst : MSBFirst; 181} 182#endif 183 184 185/* 186 * Error handling. 187 */ 188#ifndef XFree86Server 189static int mesaXErrorFlag = 0; 190 191static int mesaHandleXError( XMesaDisplay *dpy, XErrorEvent *event ) 192{ 193 (void) dpy; 194 (void) event; 195 mesaXErrorFlag = 1; 196 return 0; 197} 198#endif 199 200 201/* 202 * Check if the X Shared Memory extension is available. 203 * Return: 0 = not available 204 * 1 = shared XImage support available 205 * 2 = shared Pixmap support available also 206 */ 207#ifndef XFree86Server 208static int check_for_xshm( XMesaDisplay *display ) 209{ 210#ifdef USE_XSHM 211 int major, minor, ignore; 212 Bool pixmaps; 213 214 if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) { 215 if (XShmQueryVersion( display, &major, &minor, &pixmaps )==True) { 216 return (pixmaps==True) ? 2 : 1; 217 } 218 else { 219 return 0; 220 } 221 } 222 else { 223 return 0; 224 } 225#else 226 /* Can't compile XSHM support */ 227 return 0; 228#endif 229} 230#endif 231 232 233/* 234 * Return the width and height of the given drawable. 235 */ 236static void get_drawable_size( XMesaDisplay *dpy, XMesaDrawable d, 237 unsigned int *width, unsigned int *height) 238{ 239#ifdef XFree86Server 240 (void) dpy; 241 *width = d->width; 242 *height = d->height; 243#else 244 Window root; 245 int x, y; 246 unsigned int bw, depth; 247 248 _glthread_LOCK_MUTEX(_xmesa_lock); 249 XGetGeometry( dpy, d, &root, &x, &y, width, height, &bw, &depth ); 250 _glthread_UNLOCK_MUTEX(_xmesa_lock); 251#endif 252} 253 254 255/* 256 * Apply gamma correction to an intensity value in [0..max]. Return the 257 * new intensity value. 258 */ 259static GLint gamma_adjust( GLfloat gamma, GLint value, GLint max ) 260{ 261 if (gamma == 1.0) { 262 return value; 263 } 264 else { 265 double x = (double) value / (double) max; 266 return (GLint) ((GLfloat) max * pow( x, 1.0F/gamma ) + 0.5F); 267 } 268} 269 270 271 272/* 273 * Return the true number of bits per pixel for XImages. 274 * For example, if we request a 24-bit deep visual we may actually need/get 275 * 32bpp XImages. This function returns the appropriate bpp. 276 * Input: dpy - the X display 277 * visinfo - desribes the visual to be used for XImages 278 * Return: true number of bits per pixel for XImages 279 */ 280#define GET_BITS_PER_PIXEL(xmv) bits_per_pixel(xmv) 281 282#ifdef XFree86Server 283 284static int bits_per_pixel( XMesaVisual xmv ) 285{ 286 XMesaVisualInfo visinfo = xmv->visinfo; 287 const int depth = visinfo->nplanes; 288 int i; 289 for (i = 0; i < screenInfo.numPixmapFormats; i++) { 290 if (screenInfo.formats[i].depth == depth) 291 return screenInfo.formats[i].bitsPerPixel; 292 } 293 return depth; /* should never get here, but this should be safe */ 294} 295 296#else 297 298static int bits_per_pixel( XMesaVisual xmv ) 299{ 300 XMesaDisplay *dpy = xmv->display; 301 XMesaVisualInfo visinfo = xmv->visinfo; 302 XMesaImage *img; 303 int bitsPerPixel; 304 /* Create a temporary XImage */ 305 img = XCreateImage( dpy, visinfo->visual, visinfo->depth, 306 ZPixmap, 0, /*format, offset*/ 307 (char*) MALLOC(8), /*data*/ 308 1, 1, /*width, height*/ 309 32, /*bitmap_pad*/ 310 0 /*bytes_per_line*/ 311 ); 312 assert(img); 313 /* grab the bits/pixel value */ 314 bitsPerPixel = img->bits_per_pixel; 315 /* free the XImage */ 316 FREE( img->data ); 317 img->data = NULL; 318 XMesaDestroyImage( img ); 319 return bitsPerPixel; 320} 321#endif 322 323 324 325/* 326 * Determine if a given X window ID is valid (window exists). 327 * Do this by calling XGetWindowAttributes() for the window and 328 * checking if we catch an X error. 329 * Input: dpy - the display 330 * win - the window to check for existance 331 * Return: GL_TRUE - window exists 332 * GL_FALSE - window doesn't exist 333 */ 334#ifndef XFree86Server 335static GLboolean WindowExistsFlag; 336 337static int window_exists_err_handler( XMesaDisplay* dpy, XErrorEvent* xerr ) 338{ 339 (void) dpy; 340 if (xerr->error_code == BadWindow) { 341 WindowExistsFlag = GL_FALSE; 342 } 343 return 0; 344} 345 346static GLboolean window_exists( XMesaDisplay *dpy, Window win ) 347{ 348 XWindowAttributes wa; 349 int (*old_handler)( XMesaDisplay*, XErrorEvent* ); 350 WindowExistsFlag = GL_TRUE; 351 old_handler = XSetErrorHandler(window_exists_err_handler); 352 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */ 353 XSetErrorHandler(old_handler); 354 return WindowExistsFlag; 355} 356#endif 357 358 359 360/**********************************************************************/ 361/***** Linked list of XMesaBuffers *****/ 362/**********************************************************************/ 363 364static XMesaBuffer XMesaBufferList = NULL; 365 366 367/* Allocate a new XMesaBuffer, add to linked list */ 368static XMesaBuffer alloc_xmesa_buffer(void) 369{ 370 XMesaBuffer b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer); 371 if (b) { 372 b->Next = XMesaBufferList; 373 XMesaBufferList = b; 374 } 375 return b; 376} 377 378 379/* 380 * Find an XMesaBuffer by matching X display and colormap but NOT matching 381 * the notThis buffer. 382 */ 383static XMesaBuffer find_xmesa_buffer(XMesaDisplay *dpy, 384 XMesaColormap cmap, 385 XMesaBuffer notThis) 386{ 387 XMesaBuffer b; 388 for (b=XMesaBufferList; b; b=b->Next) { 389 if (b->display==dpy && b->cmap==cmap && b!=notThis) { 390 return b; 391 } 392 } 393 return NULL; 394} 395 396 397/* 398 * Free an XMesaBuffer, remove from linked list, perhaps free X colormap 399 * entries. 400 */ 401static void free_xmesa_buffer(int client, XMesaBuffer buffer) 402{ 403 XMesaBuffer prev = NULL, b; 404 (void) client; 405 for (b=XMesaBufferList; b; b=b->Next) { 406 if (b==buffer) { 407 /* unlink bufer from list */ 408 if (prev) 409 prev->Next = buffer->Next; 410 else 411 XMesaBufferList = buffer->Next; 412 /* Check to free X colors */ 413 if (buffer->num_alloced>0) { 414 /* If no other buffer uses this X colormap then free the colors. */ 415 if (!find_xmesa_buffer(buffer->display, buffer->cmap, buffer)) { 416#ifdef XFree86Server 417 (void)FreeColors(buffer->cmap, client, 418 buffer->num_alloced, buffer->alloced_colors, 419 0); 420#else 421 XFreeColors(buffer->display, buffer->cmap, 422 buffer->alloced_colors, buffer->num_alloced, 0); 423#endif 424 } 425 } 426 FREE(buffer); 427 return; 428 } 429 /* continue search */ 430 prev = b; 431 } 432 /* buffer not found in XMesaBufferList */ 433 gl_problem(NULL,"free_xmesa_buffer() - buffer not found\n"); 434} 435 436 437/* Copy X color table stuff from one XMesaBuffer to another. */ 438static void copy_colortable_info(XMesaBuffer dst, const XMesaBuffer src) 439{ 440 MEMCPY(dst->color_table, src->color_table, sizeof(src->color_table)); 441 MEMCPY(dst->pixel_to_r, src->pixel_to_r, sizeof(src->pixel_to_r)); 442 MEMCPY(dst->pixel_to_g, src->pixel_to_g, sizeof(src->pixel_to_g)); 443 MEMCPY(dst->pixel_to_b, src->pixel_to_b, sizeof(src->pixel_to_b)); 444 dst->num_alloced = src->num_alloced; 445 MEMCPY(dst->alloced_colors, src->alloced_colors, 446 sizeof(src->alloced_colors)); 447} 448 449 450 451/**********************************************************************/ 452/***** Misc Private Functions *****/ 453/**********************************************************************/ 454 455 456/* 457 * Return number of bits set in n. 458 */ 459static int bitcount( unsigned long n ) 460{ 461 int bits; 462 for (bits=0; n>0; n=n>>1) { 463 if (n&1) { 464 bits++; 465 } 466 } 467 return bits; 468} 469 470 471 472/* 473 * Allocate a shared memory XImage back buffer for the given XMesaBuffer. 474 * Return: GL_TRUE if success, GL_FALSE if error 475 */ 476#ifndef XFree86Server 477static GLboolean alloc_shm_back_buffer( XMesaBuffer b ) 478{ 479#ifdef USE_XSHM 480 /* 481 * We have to do a _lot_ of error checking here to be sure we can 482 * really use the XSHM extension. It seems different servers trigger 483 * errors at different points if the extension won't work. Therefore 484 * we have to be very careful... 485 */ 486 GC gc; 487 int (*old_handler)( XMesaDisplay *, XErrorEvent * ); 488 489 b->backimage = XShmCreateImage( b->xm_visual->display, 490 b->xm_visual->visinfo->visual, 491 b->xm_visual->visinfo->depth, 492 ZPixmap, NULL, &b->shminfo, 493 b->width, b->height ); 494 if (b->backimage == NULL) { 495 error("alloc_back_buffer: Shared memory error (XShmCreateImage), disabling."); 496 b->shm = 0; 497 return GL_FALSE; 498 } 499 500 b->shminfo.shmid = shmget( IPC_PRIVATE, b->backimage->bytes_per_line 501 * b->backimage->height, IPC_CREAT|0777 ); 502 if (b->shminfo.shmid < 0) { 503 if (getenv("MESA_DEBUG")) 504 perror("alloc_back_buffer"); 505 XDestroyImage( b->backimage ); 506 b->backimage = NULL; 507 error("alloc_back_buffer: Shared memory error (shmget), disabling."); 508 b->shm = 0; 509 return GL_FALSE; 510 } 511 512 b->shminfo.shmaddr = b->backimage->data 513 = (char*)shmat( b->shminfo.shmid, 0, 0 ); 514 if (b->shminfo.shmaddr == (char *) -1) { 515 if (getenv("MESA_DEBUG")) 516 perror("alloc_back_buffer"); 517 XDestroyImage( b->backimage ); 518 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 519 b->backimage = NULL; 520 error("alloc_back_buffer: Shared memory error (shmat), disabling."); 521 b->shm = 0; 522 return GL_FALSE; 523 } 524 525 b->shminfo.readOnly = False; 526 mesaXErrorFlag = 0; 527 old_handler = XSetErrorHandler( mesaHandleXError ); 528 /* This may trigger the X protocol error we're ready to catch: */ 529 XShmAttach( b->xm_visual->display, &b->shminfo ); 530 XSync( b->xm_visual->display, False ); 531 532 if (mesaXErrorFlag) { 533 /* we are on a remote display, this error is normal, don't print it */ 534 XFlush( b->xm_visual->display ); 535 mesaXErrorFlag = 0; 536 XDestroyImage( b->backimage ); 537 shmdt( b->shminfo.shmaddr ); 538 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 539 b->backimage = NULL; 540 b->shm = 0; 541 (void) XSetErrorHandler( old_handler ); 542 return GL_FALSE; 543 } 544 545 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); /* nobody else needs it */ 546 547 /* Finally, try an XShmPutImage to be really sure the extension works */ 548 gc = XCreateGC( b->xm_visual->display, b->frontbuffer, 0, NULL ); 549 XShmPutImage( b->xm_visual->display, b->frontbuffer, gc, 550 b->backimage, 0, 0, 0, 0, 1, 1 /*one pixel*/, False ); 551 XSync( b->xm_visual->display, False ); 552 XFreeGC( b->xm_visual->display, gc ); 553 (void) XSetErrorHandler( old_handler ); 554 if (mesaXErrorFlag) { 555 XFlush( b->xm_visual->display ); 556 mesaXErrorFlag = 0; 557 XDestroyImage( b->backimage ); 558 shmdt( b->shminfo.shmaddr ); 559 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 560 b->backimage = NULL; 561 b->shm = 0; 562 return GL_FALSE; 563 } 564 565 if (b->backimage) { 566 int height = b->backimage->height; 567 /* Needed by PIXELADDR1 macro */ 568 b->ximage_width1 = b->backimage->bytes_per_line; 569 b->ximage_origin1 = (GLubyte *) b->backimage->data 570 + b->ximage_width1 * (height-1); 571 /* Needed by PIXELADDR2 macro */ 572 b->ximage_width2 = b->backimage->bytes_per_line / 2; 573 b->ximage_origin2 = (GLushort *) b->backimage->data 574 + b->ximage_width2 * (height-1); 575 /* Needed by PIXELADDR3 macro */ 576 b->ximage_width3 = b->backimage->bytes_per_line; 577 b->ximage_origin3 = (GLubyte *) b->backimage->data 578 + b->ximage_width3 * (height-1); 579 /* Needed by PIXELADDR4 macro */ 580 b->ximage_width4 = b->backimage->width; 581 b->ximage_origin4 = (GLuint *) b->backimage->data 582 + b->ximage_width4 * (height-1); 583 } 584 585 return GL_TRUE; 586#else 587 /* Can't compile XSHM support */ 588 return GL_FALSE; 589#endif 590} 591#endif 592 593 594 595/* 596 * Setup an off-screen pixmap or Ximage to use as the back buffer. 597 * Input: b - the X/Mesa buffer 598 */ 599void xmesa_alloc_back_buffer( XMesaBuffer b ) 600{ 601 if (b->db_state==BACK_XIMAGE) { 602 /* Deallocate the old backimage, if any */ 603 if (b->backimage) { 604#if defined(USE_XSHM) && !defined(XFree86Server) 605 if (b->shm) { 606 XShmDetach( b->xm_visual->display, &b->shminfo ); 607 XDestroyImage( b->backimage ); 608 shmdt( b->shminfo.shmaddr ); 609 } 610 else 611#endif 612 XMesaDestroyImage( b->backimage ); 613 b->backimage = NULL; 614 } 615 616 /* Allocate new back buffer */ 617#ifdef XFree86Server 618 { 619 /* Allocate a regular XImage for the back buffer. */ 620 b->backimage = XMesaCreateImage(b->xm_visual->BitsPerPixel, 621 b->width, b->height, NULL); 622#else 623 if (b->shm==0 624 || alloc_shm_back_buffer(b)==GL_FALSE 625 ) { 626 /* Allocate a regular XImage for the back buffer. */ 627 b->backimage = XCreateImage( b->xm_visual->display, 628 b->xm_visual->visinfo->visual, 629 GET_VISUAL_DEPTH(b->xm_visual), 630 ZPixmap, 0, /* format, offset */ 631 NULL, b->width, b->height, 632 8, 0 ); /* pad, bytes_per_line */ 633#endif 634 if (!b->backimage) { 635 error("alloc_back_buffer: XCreateImage failed."); 636 } 637 b->backimage->data = (char *) MALLOC( b->backimage->height 638 * b->backimage->bytes_per_line ); 639 if (!b->backimage->data) { 640 error("alloc_back_buffer: MALLOC failed."); 641 XMesaDestroyImage( b->backimage ); 642 b->backimage = NULL; 643 } 644 } 645 b->backpixmap = None; 646 } 647 else if (b->db_state==BACK_PIXMAP) { 648 XMesaPixmap old_pixmap = b->backpixmap; 649 /* Free the old back pixmap */ 650 if (b->backpixmap) { 651 XMesaFreePixmap( b->xm_visual->display, b->backpixmap ); 652 } 653 /* Allocate new back pixmap */ 654 b->backpixmap = XMesaCreatePixmap( b->xm_visual->display, b->frontbuffer, 655 b->width, b->height, 656 GET_VISUAL_DEPTH(b->xm_visual) ); 657 b->backimage = NULL; 658 /* update other references to backpixmap */ 659 if (b->buffer==(XMesaDrawable)old_pixmap) { 660 b->buffer = (XMesaDrawable)b->backpixmap; 661 } 662 } 663} 664 665 666 667/* 668 * A replacement for XAllocColor. This function should never 669 * fail to allocate a color. When XAllocColor fails, we return 670 * the nearest matching color. If we have to allocate many colors 671 * this function isn't too efficient; the XQueryColors() could be 672 * done just once. 673 * Written by Michael Pichler, Brian Paul, Mark Kilgard 674 * Input: dpy - X display 675 * cmap - X colormap 676 * cmapSize - size of colormap 677 * In/Out: color - the XColor struct 678 * Output: exact - 1=exact color match, 0=closest match 679 * alloced - 1=XAlloc worked, 0=XAlloc failed 680 */ 681static void 682noFaultXAllocColor( int client, 683 XMesaDisplay *dpy, 684 XMesaColormap cmap, 685 int cmapSize, 686 XMesaColor *color, 687 int *exact, int *alloced ) 688{ 689#ifdef XFree86Server 690 Pixel *ppixIn; 691 xrgb *ctable; 692#else 693 /* we'll try to cache ctable for better remote display performance */ 694 static Display *prevDisplay = NULL; 695 static XMesaColormap prevCmap = 0; 696 static int prevCmapSize = 0; 697 static XMesaColor *ctable = NULL; 698#endif 699 XMesaColor subColor; 700 int i, bestmatch; 701 double mindist; /* 3*2^16^2 exceeds long int precision. */ 702 703 (void) client; 704 705 /* First try just using XAllocColor. */ 706#ifdef XFree86Server 707 if (AllocColor(cmap, 708 &color->red, &color->green, &color->blue, 709 &color->pixel, 710 client) == Success) { 711#else 712 if (XAllocColor(dpy, cmap, color)) { 713#endif 714 *exact = 1; 715 *alloced = 1; 716 return; 717 } 718 719 /* Alloc failed, search for closest match */ 720 721 /* Retrieve color table entries. */ 722 /* XXX alloca candidate. */ 723#ifdef XFree86Server 724 ppixIn = (Pixel *) MALLOC(cmapSize * sizeof(Pixel)); 725 ctable = (xrgb *) MALLOC(cmapSize * sizeof(xrgb)); 726 for (i = 0; i < cmapSize; i++) { 727 ppixIn[i] = i; 728 } 729 QueryColors(cmap, cmapSize, ppixIn, ctable); 730#else 731 if (prevDisplay != dpy || prevCmap != cmap 732 || prevCmapSize != cmapSize || !ctable) { 733 /* free previously cached color table */ 734 if (ctable) 735 FREE(ctable); 736 /* Get the color table from X */ 737 ctable = (XMesaColor *) MALLOC(cmapSize * sizeof(XMesaColor)); 738 assert(ctable); 739 for (i = 0; i < cmapSize; i++) { 740 ctable[i].pixel = i; 741 } 742 XQueryColors(dpy, cmap, ctable, cmapSize); 743 prevDisplay = dpy; 744 prevCmap = cmap; 745 prevCmapSize = cmapSize; 746 } 747#endif 748 749 /* Find best match. */ 750 bestmatch = -1; 751 mindist = 0.0; 752 for (i = 0; i < cmapSize; i++) { 753 double dr = 0.30 * ((double) color->red - (double) ctable[i].red); 754 double dg = 0.59 * ((double) color->green - (double) ctable[i].green); 755 double db = 0.11 * ((double) color->blue - (double) ctable[i].blue); 756 double dist = dr * dr + dg * dg + db * db; 757 if (bestmatch < 0 || dist < mindist) { 758 bestmatch = i; 759 mindist = dist; 760 } 761 } 762 763 /* Return result. */ 764 subColor.red = ctable[bestmatch].red; 765 subColor.green = ctable[bestmatch].green; 766 subColor.blue = ctable[bestmatch].blue; 767 /* Try to allocate the closest match color. This should only 768 * fail if the cell is read/write. Otherwise, we're incrementing 769 * the cell's reference count. 770 */ 771#ifdef XFree86Server 772 if (AllocColor(cmap, 773 &subColor.red, &subColor.green, &subColor.blue, 774 &subColor.pixel, 775 client) == Success) { 776#else 777 if (XAllocColor(dpy, cmap, &subColor)) { 778#endif 779 *alloced = 1; 780 } 781 else { 782 /* do this to work around a problem reported by Frank Ortega */ 783 subColor.pixel = (unsigned long) bestmatch; 784 subColor.red = ctable[bestmatch].red; 785 subColor.green = ctable[bestmatch].green; 786 subColor.blue = ctable[bestmatch].blue; 787 subColor.flags = DoRed | DoGreen | DoBlue; 788 *alloced = 0; 789 } 790#ifdef XFree86Server 791 FREE(ppixIn); 792 FREE(ctable); 793#else 794 /* don't free table, save it for next time */ 795#endif 796 797 *color = subColor; 798 *exact = 0; 799} 800 801 802 803 804/* 805 * Do setup for PF_GRAYSCALE pixel format. 806 * Note that buffer may be NULL. 807 */ 808static GLboolean setup_grayscale( int client, XMesaVisual v, 809 XMesaBuffer buffer, XMesaColormap cmap ) 810{ 811 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 812 return GL_FALSE; 813 } 814 815 if (buffer) { 816 XMesaBuffer prevBuffer; 817 818 if (!cmap) { 819 return GL_FALSE; 820 } 821 822 prevBuffer = find_xmesa_buffer(v->display, cmap, buffer); 823 if (prevBuffer && 824 (buffer->xm_visual->gl_visual->RGBAflag == 825 prevBuffer->xm_visual->gl_visual->RGBAflag)) { 826 /* Copy colormap stuff from previous XMesaBuffer which uses same 827 * X colormap. Do this to avoid time spent in noFaultXAllocColor. 828 */ 829 copy_colortable_info(buffer, prevBuffer); 830 } 831 else { 832 /* Allocate 256 shades of gray */ 833 int gray; 834 int colorsfailed = 0; 835 for (gray=0;gray<256;gray++) { 836 GLint r = gamma_adjust( v->RedGamma, gray, 255 ); 837 GLint g = gamma_adjust( v->GreenGamma, gray, 255 ); 838 GLint b = gamma_adjust( v->BlueGamma, gray, 255 ); 839 int exact, alloced; 840 XMesaColor xcol; 841 xcol.red = (r << 8) | r; 842 xcol.green = (g << 8) | g; 843 xcol.blue = (b << 8) | b; 844 noFaultXAllocColor( client, v->display, 845 cmap, GET_COLORMAP_SIZE(v), 846 &xcol, &exact, &alloced ); 847 if (!exact) { 848 colorsfailed++; 849 } 850 if (alloced) { 851 assert(buffer->num_alloced<256); 852 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 853 buffer->num_alloced++; 854 } 855 856 /*OLD 857 assert(gray < 576); 858 buffer->color_table[gray*3+0] = xcol.pixel; 859 buffer->color_table[gray*3+1] = xcol.pixel; 860 buffer->color_table[gray*3+2] = xcol.pixel; 861 assert(xcol.pixel < 65536); 862 buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100; 863 buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100; 864 buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100; 865 */ 866 buffer->color_table[gray] = xcol.pixel; 867 assert(xcol.pixel < 65536); 868 buffer->pixel_to_r[xcol.pixel] = gray; 869 buffer->pixel_to_g[xcol.pixel] = gray; 870 buffer->pixel_to_b[xcol.pixel] = gray; 871 } 872 873 if (colorsfailed && getenv("MESA_DEBUG")) { 874 fprintf( stderr, 875 "Note: %d out of 256 needed colors do not match exactly.\n", 876 colorsfailed ); 877 } 878 } 879 } 880 881 v->dithered_pf = PF_GRAYSCALE; 882 v->undithered_pf = PF_GRAYSCALE; 883 return GL_TRUE; 884} 885 886 887 888/* 889 * Setup RGB rendering for a window with a PseudoColor, StaticColor, 890 * or 8-bit TrueColor visual visual. We try to allocate a palette of 225 891 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB 892 * color. While this function was originally designed just for 8-bit 893 * visuals, it has also proven to work from 4-bit up to 16-bit visuals. 894 * Dithering code contributed by Bob Mercier. 895 */ 896static GLboolean setup_dithered_color( int client, XMesaVisual v, 897 XMesaBuffer buffer, XMesaColormap cmap ) 898{ 899 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 900 return GL_FALSE; 901 } 902 903 if (buffer) { 904 XMesaBuffer prevBuffer; 905 906 if (!cmap) { 907 return GL_FALSE; 908 } 909 910 prevBuffer = find_xmesa_buffer(v->display, cmap, buffer); 911 if (prevBuffer && 912 (buffer->xm_visual->gl_visual->RGBAflag == 913 prevBuffer->xm_visual->gl_visual->RGBAflag)) { 914 /* Copy colormap stuff from previous, matching XMesaBuffer. 915 * Do this to avoid time spent in noFaultXAllocColor. 916 */ 917 copy_colortable_info(buffer, prevBuffer); 918 } 919 else { 920 /* Allocate X colors and initialize color_table[], red_table[], etc */ 921 int r, g, b, i; 922 int colorsfailed = 0; 923 for (r = 0; r < _R; r++) { 924 for (g = 0; g < _G; g++) { 925 for (b = 0; b < _B; b++) { 926 XMesaColor xcol; 927 int exact, alloced; 928 xcol.red =gamma_adjust(v->RedGamma, r*65535/(_R-1),65535); 929 xcol.green=gamma_adjust(v->GreenGamma, g*65535/(_G-1),65535); 930 xcol.blue =gamma_adjust(v->BlueGamma, b*65535/(_B-1),65535); 931 noFaultXAllocColor( client, v->display, 932 cmap, GET_COLORMAP_SIZE(v), 933 &xcol, &exact, &alloced ); 934 if (!exact) { 935 colorsfailed++; 936 } 937 if (alloced) { 938 assert(buffer->num_alloced<256); 939 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 940 buffer->num_alloced++; 941 } 942 i = _MIX( r, g, b ); 943 assert(i < 576); 944 buffer->color_table[i] = xcol.pixel; 945 assert(xcol.pixel < 65536); 946 buffer->pixel_to_r[xcol.pixel] = r * 255 / (_R-1); 947 buffer->pixel_to_g[xcol.pixel] = g * 255 / (_G-1); 948 buffer->pixel_to_b[xcol.pixel] = b * 255 / (_B-1); 949 } 950 } 951 } 952 953 if (colorsfailed && getenv("MESA_DEBUG")) { 954 fprintf( stderr, 955 "Note: %d out of %d needed colors do not match exactly.\n", 956 colorsfailed, _R*_G*_B ); 957 } 958 } 959 } 960 961 v->dithered_pf = PF_DITHER; 962 v->undithered_pf = PF_LOOKUP; 963 return GL_TRUE; 964} 965 966 967/* 968 * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode. 969 * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer. 970 * Special dithering tables have to be initialized. 971 */ 972static void setup_8bit_hpcr( XMesaVisual v ) 973{ 974 /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be) 975 * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined 976 * on the root window AND the colormap obtainable by XGetRGBColormaps 977 * for that atom must be set on the window. (see also tkInitWindow) 978 * If that colormap is not set, the output will look stripy. 979 */ 980 981 /* Setup color tables with gamma correction */ 982 int i; 983 double g; 984 985 g = 1.0 / v->RedGamma; 986 for (i=0; i<256; i++) { 987 GLint red = (GLint) (255.0 * pow( hpcr_rgbTbl[0][i]/255.0, g ) + 0.5); 988 v->hpcr_rgbTbl[0][i] = CLAMP( red, 16, 239 ); 989 } 990 991 g = 1.0 / v->GreenGamma; 992 for (i=0; i<256; i++) { 993 GLint green = (GLint) (255.0 * pow( hpcr_rgbTbl[1][i]/255.0, g ) + 0.5); 994 v->hpcr_rgbTbl[1][i] = CLAMP( green, 16, 239 ); 995 } 996 997 g = 1.0 / v->BlueGamma; 998 for (i=0; i<256; i++) { 999 GLint blue = (GLint) (255.0 * pow( hpcr_rgbTbl[2][i]/255.0, g ) + 0.5); 1000 v->hpcr_rgbTbl[2][i] = CLAMP( blue, 32, 223 ); 1001 } 1002 v->undithered_pf = PF_HPCR; /* can't really disable dithering for now */ 1003 v->dithered_pf = PF_HPCR; 1004 1005 /* which method should I use to clear */ 1006 /* GL_FALSE: keep the ordinary method */ 1007 /* GL_TRUE : clear with dither pattern */ 1008 v->hpcr_clear_flag = getenv("MESA_HPCR_CLEAR") ? GL_TRUE : GL_FALSE; 1009 1010 if (v->hpcr_clear_flag) { 1011 v->hpcr_clear_pixmap = XMesaCreatePixmap(v->display, 1012 DefaultRootWindow(v->display), 1013 16, 2, 8); 1014#ifndef XFree86Server 1015 v->hpcr_clear_ximage = XGetImage(v->display, v->hpcr_clear_pixmap, 1016 0, 0, 16, 2, AllPlanes, ZPixmap); 1017#endif 1018 } 1019} 1020 1021 1022/* 1023 * Setup RGB rendering for a window with a True/DirectColor visual. 1024 */ 1025static void setup_truecolor( XMesaVisual v, XMesaBuffer buffer, 1026 XMesaWindow window, XMesaColormap cmap ) 1027{ 1028 unsigned long rmask, gmask, bmask; 1029 (void) buffer; 1030 (void) window; 1031 (void) cmap; 1032 1033 /* Compute red multiplier (mask) and bit shift */ 1034 v->rshift = 0; 1035 rmask = GET_REDMASK(v); 1036 while ((rmask & 1)==0) { 1037 v->rshift++; 1038 rmask = rmask >> 1; 1039 } 1040 1041 /* Compute green multiplier (mask) and bit shift */ 1042 v->gshift = 0; 1043 gmask = GET_GREENMASK(v); 1044 while ((gmask & 1)==0) { 1045 v->gshift++; 1046 gmask = gmask >> 1; 1047 } 1048 1049 /* Compute blue multiplier (mask) and bit shift */ 1050 v->bshift = 0; 1051 bmask = GET_BLUEMASK(v); 1052 while ((bmask & 1)==0) { 1053 v->bshift++; 1054 bmask = bmask >> 1; 1055 } 1056 1057 /* 1058 * Compute component-to-pixel lookup tables and dithering kernel 1059 */ 1060 { 1061 static GLubyte kernel[16] = { 1062 0*16, 8*16, 2*16, 10*16, 1063 12*16, 4*16, 14*16, 6*16, 1064 3*16, 11*16, 1*16, 9*16, 1065 15*16, 7*16, 13*16, 5*16, 1066 }; 1067 GLint rBits = bitcount(rmask); 1068 GLint gBits = bitcount(gmask); 1069 GLint bBits = bitcount(bmask); 1070 GLint minBits; 1071 GLuint i; 1072 1073 /* convert pixel components in [0,_mask] to RGB values in [0,255] */ 1074 for (i=0; i<=rmask; i++) 1075 v->PixelToR[i] = (unsigned char) ((i * 255) / rmask); 1076 for (i=0; i<=gmask; i++) 1077 v->PixelToG[i] = (unsigned char) ((i * 255) / gmask); 1078 for (i=0; i<=bmask; i++) 1079 v->PixelToB[i] = (unsigned char) ((i * 255) / bmask); 1080 1081 /* convert RGB values from [0,255] to pixel components */ 1082 1083 for (i=0;i<256;i++) { 1084 GLint r = gamma_adjust(v->RedGamma, i, 255); 1085 GLint g = gamma_adjust(v->GreenGamma, i, 255); 1086 GLint b = gamma_adjust(v->BlueGamma, i, 255); 1087 v->RtoPixel[i] = (r >> (8-rBits)) << v->rshift; 1088 v->GtoPixel[i] = (g >> (8-gBits)) << v->gshift; 1089 v->BtoPixel[i] = (b >> (8-bBits)) << v->bshift; 1090 } 1091 /* overflow protection */ 1092 for (i=256;i<512;i++) { 1093 v->RtoPixel[i] = v->RtoPixel[255]; 1094 v->GtoPixel[i] = v->GtoPixel[255]; 1095 v->BtoPixel[i] = v->BtoPixel[255]; 1096 } 1097 1098 /* setup dithering kernel */ 1099 minBits = rBits; 1100 if (gBits < minBits) minBits = gBits; 1101 if (bBits < minBits) minBits = bBits; 1102 for (i=0;i<16;i++) { 1103 v->Kernel[i] = kernel[i] >> minBits; 1104 } 1105 1106 v->undithered_pf = PF_TRUECOLOR; 1107 v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_TRUEDITHER : PF_TRUECOLOR; 1108 } 1109 1110 /* 1111 * Now check for TrueColor visuals which we can optimize. 1112 */ 1113 if ( GET_REDMASK(v) ==0x0000ff 1114 && GET_GREENMASK(v)==0x00ff00 1115 && GET_BLUEMASK(v) ==0xff0000 1116 && CHECK_BYTE_ORDER(v) 1117 && v->BitsPerPixel==32 1118 && sizeof(GLuint)==4 1119 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1120 /* common 32 bpp config used on SGI, Sun */ 1121 v->undithered_pf = v->dithered_pf = PF_8A8B8G8R; 1122 } 1123 else if (GET_REDMASK(v) ==0xff0000 1124 && GET_GREENMASK(v)==0x00ff00 1125 && GET_BLUEMASK(v) ==0x0000ff 1126 && CHECK_BYTE_ORDER(v) 1127 && v->BitsPerPixel==32 1128 && sizeof(GLuint)==4 1129 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1130 /* common 32 bpp config used on Linux, HP, IBM */ 1131 v->undithered_pf = v->dithered_pf = PF_8R8G8B; 1132 } 1133 else if (GET_REDMASK(v) ==0xff0000 1134 && GET_GREENMASK(v)==0x00ff00 1135 && GET_BLUEMASK(v) ==0x0000ff 1136 && CHECK_BYTE_ORDER(v) 1137 && v->BitsPerPixel==24 1138 && sizeof(GLuint)==4 1139 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1140 /* common packed 24 bpp config used on Linux */ 1141 v->undithered_pf = v->dithered_pf = PF_8R8G8B24; 1142 } 1143 else if (GET_REDMASK(v) ==0xf800 1144 && GET_GREENMASK(v)==0x07e0 1145 && GET_BLUEMASK(v) ==0x001f 1146 && CHECK_BYTE_ORDER(v) 1147 && v->BitsPerPixel==16 1148 && sizeof(GLushort)==2 1149 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1150 /* 5-6-5 color weight on common PC VGA boards */ 1151 v->undithered_pf = PF_5R6G5B; 1152 v->dithered_pf = PF_DITHER_5R6G5B; 1153 } 1154 else if (GET_REDMASK(v) ==0xe0 1155 && GET_GREENMASK(v)==0x1c 1156 && GET_BLUEMASK(v) ==0x03 1157 && CHECK_FOR_HPCR(v)) { 1158 setup_8bit_hpcr( v ); 1159 } 1160} 1161 1162 1163 1164/* 1165 * Setup RGB rendering for a window with a monochrome visual. 1166 */ 1167static void setup_monochrome( XMesaVisual v, XMesaBuffer b ) 1168{ 1169 (void) b; 1170 v->dithered_pf = v->undithered_pf = PF_1BIT; 1171 /* if black=1 then we must flip pixel values */ 1172 v->bitFlip = (GET_BLACK_PIXEL(v) != 0); 1173} 1174 1175 1176 1177/* 1178 * When a context is "made current" for the first time, we can finally 1179 * finish initializing the context's visual and buffer information. 1180 * Input: v - the XMesaVisual to initialize 1181 * b - the XMesaBuffer to initialize (may be NULL) 1182 * rgb_flag - TRUE = RGBA mode, FALSE = color index mode 1183 * window - the window/pixmap we're rendering into 1184 * cmap - the colormap associated with the window/pixmap 1185 * Return: GL_TRUE=success, GL_FALSE=failure 1186 */ 1187static GLboolean initialize_visual_and_buffer( int client, 1188 XMesaVisual v, 1189 XMesaBuffer b, 1190 GLboolean rgb_flag, 1191 XMesaDrawable window, 1192 XMesaColormap cmap 1193 ) 1194{ 1195#ifndef XFree86Server 1196 XGCValues gcvalues; 1197#endif 1198 1199 if (b) { 1200 assert(b->xm_visual == v); 1201 } 1202 1203 /* Save true bits/pixel */ 1204 v->BitsPerPixel = GET_BITS_PER_PIXEL(v); 1205 assert(v->BitsPerPixel > 0); 1206 1207 1208 if (rgb_flag==GL_FALSE) { 1209 /* COLOR-INDEXED WINDOW: 1210 * Even if the visual is TrueColor or DirectColor we treat it as 1211 * being color indexed. This is weird but might be useful to someone. 1212 */ 1213 v->dithered_pf = v->undithered_pf = PF_INDEX; 1214 v->index_bits = GET_VISUAL_DEPTH(v); 1215 } 1216 else { 1217 /* RGB WINDOW: 1218 * We support RGB rendering into almost any kind of visual. 1219 */ 1220 int xclass; 1221 xclass = GET_VISUAL_CLASS(v); 1222 if (xclass==TrueColor || xclass==DirectColor) { 1223 setup_truecolor( v, b, (XMesaWindow)window, cmap ); 1224 } 1225 else if (xclass==StaticGray && GET_VISUAL_DEPTH(v)==1) { 1226 setup_monochrome( v, b ); 1227 } 1228 else if (xclass==GrayScale || xclass==StaticGray) { 1229 if (!setup_grayscale( client, v, b, cmap )) { 1230 return GL_FALSE; 1231 } 1232 } 1233 else if ((xclass==PseudoColor || xclass==StaticColor) 1234 && GET_VISUAL_DEPTH(v)>=4 && GET_VISUAL_DEPTH(v)<=16) { 1235 if (!setup_dithered_color( client, v, b, cmap )) { 1236 return GL_FALSE; 1237 } 1238 } 1239 else { 1240 error("XMesa: RGB mode rendering not supported in given visual."); 1241 return GL_FALSE; 1242 } 1243 v->index_bits = 0; 1244 1245 if (getenv("MESA_NO_DITHER")) { 1246 v->dithered_pf = v->undithered_pf; 1247 } 1248 } 1249 1250 1251 /* 1252 * If MESA_INFO env var is set print out some debugging info 1253 * which can help Brian figure out what's going on when a user 1254 * reports bugs. 1255 */ 1256 if (getenv("MESA_INFO")) { 1257 fprintf(stderr, "X/Mesa visual = %p\n", v); 1258 fprintf(stderr, "X/Mesa dithered pf = %u\n", v->dithered_pf); 1259 fprintf(stderr, "X/Mesa undithered pf = %u\n", v->undithered_pf); 1260 fprintf(stderr, "X/Mesa level = %d\n", v->level); 1261 fprintf(stderr, "X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v)); 1262 fprintf(stderr, "X/Mesa bits per pixel = %d\n", v->BitsPerPixel); 1263 } 1264 1265 if (b && window) { 1266 /* Do window-specific initializations */ 1267 1268 /* Window dimensions */ 1269 unsigned int w, h; 1270 get_drawable_size( v->display, window, &w, &h ); 1271 b->width = w; 1272 b->height = h; 1273 1274 b->frontbuffer = window; 1275 1276 assert( v->gl_visual ); 1277 1278 /* Setup for single/double buffering */ 1279 if (v->gl_visual->DBflag) { 1280 /* Double buffered */ 1281#ifndef XFree86Server 1282 b->shm = check_for_xshm( v->display ); 1283#endif 1284 xmesa_alloc_back_buffer( b ); 1285 if (b->db_state==BACK_PIXMAP) { 1286 b->buffer = (XMesaDrawable)b->backpixmap; 1287 } 1288 else { 1289 b->buffer = XIMAGE; 1290 } 1291 } 1292 else { 1293 /* Single Buffered */ 1294 b->buffer = b->frontbuffer; 1295 } 1296 1297 /* X11 graphics contexts */ 1298#ifdef XFree86Server 1299 b->gc = CreateScratchGC(v->display, window->depth); 1300#else 1301 b->gc = XCreateGC( v->display, window, 0, NULL ); 1302#endif 1303 XMesaSetFunction( v->display, b->gc, GXcopy ); 1304 1305 /* 1306 * Don't generate Graphics Expose/NoExpose events in swapbuffers(). 1307 * Patch contributed by Michael Pichler May 15, 1995. 1308 */ 1309#ifdef XFree86Server 1310 b->cleargc = CreateScratchGC(v->display, window->depth); 1311 { 1312 CARD32 v[1]; 1313 v[0] = FALSE; 1314 dixChangeGC(NullClient, b->cleargc, GCGraphicsExposures, v, NULL); 1315 } 1316#else 1317 gcvalues.graphics_exposures = False; 1318 b->cleargc = XCreateGC( v->display, window, 1319 GCGraphicsExposures, &gcvalues); 1320#endif 1321 XMesaSetFunction( v->display, b->cleargc, GXcopy ); 1322 /* 1323 * Set fill style and tile pixmap once for all for HPCR stuff 1324 * (instead of doing it each time in clear_color_HPCR_pixmap()) 1325 * Initialize whole stuff 1326 * Patch contributed by Jacques Leroy March 8, 1998. 1327 */ 1328 if (v->hpcr_clear_flag && b->buffer!=XIMAGE) { 1329 int i; 1330 for (i=0; i<16; i++) 1331 { 1332 XMesaPutPixel(v->hpcr_clear_ximage, i, 0, 0); 1333 XMesaPutPixel(v->hpcr_clear_ximage, i, 1, 0); 1334 } 1335 XMesaPutImage(b->display, (XMesaDrawable)v->hpcr_clear_pixmap, 1336 b->cleargc, v->hpcr_clear_ximage, 0, 0, 0, 0, 16, 2); 1337 XMesaSetFillStyle( v->display, b->cleargc, FillTiled); 1338 XMesaSetTile( v->display, b->cleargc, v->hpcr_clear_pixmap ); 1339 } 1340 1341 /* Initialize the row buffer XImage for use in write_color_span() */ 1342#ifdef XFree86Server 1343 b->rowimage = XMesaCreateImage(GET_VISUAL_DEPTH(v), MAX_WIDTH, 1, 1344 (char *)MALLOC(MAX_WIDTH*4)); 1345#else 1346 b->rowimage = XCreateImage( v->display, 1347 v->visinfo->visual, 1348 v->visinfo->depth, 1349 ZPixmap, 0, /*format, offset*/ 1350 (char*) MALLOC(MAX_WIDTH*4), /*data*/ 1351 MAX_WIDTH, 1, /*width, height*/ 1352 32, /*bitmap_pad*/ 1353 0 /*bytes_per_line*/ ); 1354#endif 1355 } 1356 1357 return GL_TRUE; 1358} 1359 1360 1361 1362/* 1363 * Convert an RGBA color to a pixel value. 1364 */ 1365unsigned long 1366xmesa_color_to_pixel( XMesaContext xmesa, GLubyte r, GLubyte g, GLubyte b, GLubyte a, 1367 GLuint pixelFormat) 1368{ 1369 switch (pixelFormat) { 1370 case PF_INDEX: 1371 return 0; 1372 case PF_TRUECOLOR: 1373 { 1374 unsigned long p; 1375 PACK_TRUECOLOR( p, r, g, b ); 1376 return p; 1377 } 1378 case PF_8A8B8G8R: 1379 return PACK_8A8B8G8R( r, g, b, a ); 1380 case PF_8R8G8B: 1381 /* fall through */ 1382 case PF_8R8G8B24: 1383 return PACK_8R8G8B( r, g, b ); 1384 case PF_5R6G5B: 1385 return PACK_5R6G5B( r, g, b ); 1386 case PF_DITHER: 1387 { 1388 DITHER_SETUP; 1389 return DITHER( 1, 0, r, g, b ); 1390 } 1391 case PF_1BIT: 1392 /* 382 = (3*255)/2 */ 1393 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 1394 case PF_HPCR: 1395 return DITHER_HPCR(1, 1, r, g, b); 1396 case PF_LOOKUP: 1397 { 1398 LOOKUP_SETUP; 1399 return LOOKUP( r, g, b ); 1400 } 1401 case PF_GRAYSCALE: 1402 return GRAY_RGB( r, g, b ); 1403 case PF_TRUEDITHER: 1404 /* fall through */ 1405 case PF_DITHER_5R6G5B: 1406 { 1407 unsigned long p; 1408 PACK_TRUEDITHER(p, 1, 0, r, g, b); 1409 return p; 1410 } 1411 default: 1412 gl_problem(NULL, "Bad pixel format in xmesa_color_to_pixel"); 1413 } 1414 return 0; 1415} 1416 1417 1418/**********************************************************************/ 1419/***** Public Functions *****/ 1420/**********************************************************************/ 1421 1422 1423/* 1424 * Create a new X/Mesa visual. 1425 * Input: display - X11 display 1426 * visinfo - an XVisualInfo pointer 1427 * rgb_flag - GL_TRUE = RGB mode, 1428 * GL_FALSE = color index mode 1429 * alpha_flag - alpha buffer requested? 1430 * db_flag - GL_TRUE = double-buffered, 1431 * GL_FALSE = single buffered 1432 * stereo_flag - stereo visual? 1433 * ximage_flag - GL_TRUE = use an XImage for back buffer, 1434 * GL_FALSE = use an off-screen pixmap for back buffer 1435 * depth_size - requested bits/depth values, or zero 1436 * stencil_size - requested bits/stencil values, or zero 1437 * accum_red_size - requested bits/red accum values, or zero 1438 * accum_green_size - requested bits/green accum values, or zero 1439 * accum_blue_size - requested bits/blue accum values, or zero 1440 * accum_alpha_size - requested bits/alpha accum values, or zero 1441 * num_samples - number of samples/pixel if multisampling, or zero 1442 * level - visual level, usually 0 1443 * visualCaveat - ala the GLX extension, usually GLX_NONE_EXT 1444 * Return; a new XMesaVisual or 0 if error. 1445 */ 1446XMesaVisual XMesaCreateVisual( XMesaDisplay *display, 1447 XMesaVisualInfo visinfo, 1448 GLboolean rgb_flag, 1449 GLboolean alpha_flag, 1450 GLboolean db_flag, 1451 GLboolean stereo_flag, 1452 GLboolean ximage_flag, 1453 GLint depth_size, 1454 GLint stencil_size, 1455 GLint accum_red_size, 1456 GLint accum_green_size, 1457 GLint accum_blue_size, 1458 GLint accum_alpha_size, 1459 GLint num_samples, 1460 GLint level, 1461 GLint visualCaveat ) 1462{ 1463 char *gamma; 1464 XMesaVisual v; 1465 GLint red_bits, green_bits, blue_bits, alpha_bits; 1466 1467 /* For debugging only */ 1468 if (getenv("MESA_XSYNC")) { 1469 /* This makes debugging X easier. 1470 * In your debugger, set a breakpoint on _XError to stop when an 1471 * X protocol error is generated. 1472 */ 1473#ifdef XFree86Server 1474 /* NOT_NEEDED */ 1475#else 1476 XSynchronize( display, 1 ); 1477#endif 1478 } 1479 1480 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 1481 if (!v) { 1482 return NULL; 1483 } 1484 1485 /* 1486 * In the X server, NULL is passed in for the display. It will have 1487 * to be set before using this visual. See XMesaSetVisualDisplay() 1488 * below. 1489 */ 1490 v->display = display; 1491 1492 /* Save a copy of the XVisualInfo struct because the user may XFREE() 1493 * the struct but we may need some of the information contained in it 1494 * at a later time. 1495 */ 1496#ifdef XFree86Server 1497 v->visinfo = visinfo; 1498#else 1499 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 1500 if(!v->visinfo) { 1501 FREE(v); 1502 return NULL; 1503 } 1504 MEMCPY(v->visinfo, visinfo, sizeof(*visinfo)); 1505 1506 /* Save a copy of the pointer now so we can find this visual again 1507 * if we need to search for it in find_glx_visual(). 1508 */ 1509 v->vishandle = visinfo; 1510#endif 1511 1512#ifdef XFree86Server 1513 /* Initialize the depth of the screen */ 1514 { 1515 PixmapFormatRec *format; 1516 1517 for (format = screenInfo.formats; 1518 format->depth != display->rootDepth; 1519 format++) 1520 ; 1521 v->screen_depth = format->bitsPerPixel; 1522 } 1523#endif 1524 1525 /* check for MESA_GAMMA environment variable */ 1526 gamma = getenv("MESA_GAMMA"); 1527 if (gamma) { 1528 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0; 1529 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma ); 1530 if (v->RedGamma<=0.0) v->RedGamma = 1.0; 1531 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma; 1532 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma; 1533 } 1534 else { 1535 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0; 1536 } 1537 1538 v->ximage_flag = ximage_flag; 1539 v->level = level; 1540 v->VisualCaveat = visualCaveat; 1541 1542 (void) initialize_visual_and_buffer( 0, v, NULL, rgb_flag, 0, 0 ); 1543 1544 { 1545 int xclass; 1546 xclass = GET_VISUAL_CLASS(v); 1547 if (xclass==TrueColor || xclass==DirectColor) { 1548 red_bits = bitcount(GET_REDMASK(v)); 1549 green_bits = bitcount(GET_GREENMASK(v)); 1550 blue_bits = bitcount(GET_BLUEMASK(v)); 1551 alpha_bits = 0; 1552 } 1553 else { 1554 /* this is an approximation */ 1555 int depth; 1556 depth = GET_VISUAL_DEPTH(v); 1557 red_bits = depth / 3; 1558 depth -= red_bits; 1559 green_bits = depth / 2; 1560 depth -= green_bits; 1561 blue_bits = depth; 1562 alpha_bits = 0; 1563 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) ); 1564 } 1565 } 1566 1567 if (alpha_flag && alpha_bits == 0) 1568 alpha_bits = 8; 1569 1570 v->gl_visual = _mesa_create_visual( rgb_flag, db_flag, stereo_flag, 1571 red_bits, green_bits, 1572 blue_bits, alpha_bits, 1573 v->index_bits, 1574 depth_size, 1575 stencil_size, 1576 accum_red_size, accum_green_size, 1577 accum_blue_size, accum_alpha_size, 1578 0 ); 1579 if (!v->gl_visual) { 1580#ifndef XFree86Server 1581 FREE(v->visinfo); 1582#endif 1583 FREE(v); 1584 return NULL; 1585 } 1586 1587 return v; 1588} 1589 1590 1591void XMesaSetVisualDisplay( XMesaDisplay *dpy, XMesaVisual v ) 1592{ 1593 v->display = dpy; 1594} 1595 1596 1597void XMesaDestroyVisual( XMesaVisual v ) 1598{ 1599 _mesa_destroy_visual( v->gl_visual ); 1600#ifndef XFree86Server 1601 FREE(v->visinfo); 1602#endif 1603 FREE(v); 1604} 1605 1606 1607 1608/* 1609 * Create a new XMesaContext. 1610 * Input: v - XMesaVisual 1611 * share_list - another XMesaContext with which to share display 1612 * lists or NULL if no sharing is wanted. 1613 * Return: an XMesaContext or NULL if error. 1614 */ 1615XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) 1616{ 1617 XMesaContext c; 1618 GLcontext *ctx; 1619 GLboolean direct = GL_TRUE; /* XXXX */ 1620 /* NOT_DONE: should this be GL_FALSE??? */ 1621 static GLboolean firstTime = GL_TRUE; 1622 1623 if (firstTime) { 1624 _glthread_INIT_MUTEX(_xmesa_lock); 1625 firstTime = GL_FALSE; 1626 } 1627 1628 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 1629 if (!c) { 1630 return NULL; 1631 } 1632 1633 ctx = c->gl_ctx = _mesa_create_context( v->gl_visual, 1634 share_list ? share_list->gl_ctx : (GLcontext *) NULL, 1635 (void *) c, direct ); 1636 if (!c->gl_ctx) { 1637 FREE(c); 1638 return NULL; 1639 } 1640 1641 gl_extensions_enable(ctx, "GL_HP_occlusion_test"); 1642 gl_extensions_enable(ctx, "GL_ARB_texture_cube_map"); 1643 gl_extensions_enable(ctx, "GL_EXT_texture_env_combine"); 1644 1645 if (CHECK_BYTE_ORDER(v)) { 1646 c->swapbytes = GL_FALSE; 1647 } 1648 else { 1649 c->swapbytes = GL_TRUE; 1650 } 1651 1652 c->xm_visual = v; 1653 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ 1654 c->display = v->display; 1655 c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */ 1656 1657 ctx->Driver.UpdateState = xmesa_update_state; 1658 1659#if defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server) 1660 c->driContextPriv = driContextPriv; 1661#endif 1662 1663 /* Set up some constant pointers: 1664 */ 1665 xmesa_init_pointers( ctx ); 1666 1667 /* Initialize the software rasterizer and helper modules. 1668 */ 1669 _swrast_CreateContext( ctx ); 1670 _swsetup_CreateContext( ctx ); 1671 _tnl_CreateContext( ctx ); 1672 1673 xmesa_register_swrast_functions( ctx ); 1674 1675 /* Run the config file 1676 */ 1677 _mesa_context_initialize( ctx ); 1678 1679 1680 return c; 1681} 1682 1683 1684 1685 1686void XMesaDestroyContext( XMesaContext c ) 1687{ 1688#ifdef FX 1689 if (c->xm_buffer && c->xm_buffer->FXctx) 1690 fxMesaDestroyContext(c->xm_buffer->FXctx); 1691#endif 1692 if (c->gl_ctx) { 1693 _swsetup_DestroyContext( c->gl_ctx ); 1694 _swrast_DestroyContext( c->gl_ctx ); 1695 _mesa_destroy_context( c->gl_ctx ); 1696 } 1697 1698 /* Disassociate old buffer with this context */ 1699 if (c->xm_buffer) 1700 c->xm_buffer->xm_context = NULL; 1701 1702 /* Destroy any buffers which are using this context. If we don't 1703 * we may have dangling references. Hmm, maybe we should just 1704 * set the buffer's context pointer to NULL instead of deleting it? 1705 * Let's see if we get any bug reports... 1706 * This contributed by Doug Rabson <dfr@calcaphon.com> 1707 */ 1708 { 1709 XMesaBuffer b, next; 1710 for (b = XMesaBufferList; b; b = next) { 1711 next = b->Next; 1712 if (!b->pixmap_flag) { 1713#ifndef XFree86Server 1714 XSync(b->display, False); 1715#endif 1716 if (b->xm_context == c) { 1717 /* found a context created for this context */ 1718 XMesaDestroyBuffer( b ); 1719 } 1720 } 1721 } 1722 } 1723 1724 FREE( c ); 1725} 1726 1727 1728 1729/* 1730 * XXX this isn't a public function! It's a hack for the 3Dfx driver. 1731 * Create a new XMesaBuffer from an X window. 1732 * Input: v - the XMesaVisual 1733 * w - the window 1734 * c - the context 1735 * Return: new XMesaBuffer or NULL if error 1736 */ 1737XMesaBuffer XMesaCreateWindowBuffer2( XMesaVisual v, XMesaWindow w, 1738 XMesaContext c ) 1739{ 1740#ifndef XFree86Server 1741 XWindowAttributes attr; 1742#endif 1743#ifdef FX 1744 char *fxEnvVar; 1745#endif 1746 int client = 0; 1747 1748 XMesaBuffer b = alloc_xmesa_buffer(); 1749 if (!b) { 1750 return NULL; 1751 } 1752 1753 (void) c; 1754 1755#ifdef XFree86Server 1756 client = CLIENT_ID(((XMesaDrawable)w)->id); 1757#endif 1758 1759 assert(v); 1760 1761#ifdef XFree86Server 1762 if (GET_VISUAL_DEPTH(v) != ((XMesaDrawable)w)->depth) { 1763#else 1764 XGetWindowAttributes( v->display, w, &attr ); 1765 1766 if (GET_VISUAL_DEPTH(v) != attr.depth) { 1767#endif 1768 if (getenv("MESA_DEBUG")) { 1769 fprintf(stderr, "XMesaCreateWindowBuffer: depth mismatch between visual and window!\n"); 1770 } 1771 return NULL; 1772 } 1773 1774 b->xm_context = NULL; /* Associate no context with this buffer */ 1775 1776 b->xm_visual = v; 1777 b->pixmap_flag = GL_FALSE; 1778 b->display = v->display; 1779#ifdef XFree86Server 1780 b->cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP); 1781#else 1782 if (attr.colormap) { 1783 b->cmap = attr.colormap; 1784 } 1785 else { 1786 if (getenv("MESA_DEBUG")) { 1787 fprintf(stderr, "Window %u has no colormap!\n", (unsigned int) w); 1788 } 1789 /* this is weird, a window w/out a colormap!? */ 1790 /* OK, let's just allocate a new one and hope for the best */ 1791 b->cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 1792 } 1793#endif 1794 1795 /* determine back buffer implementation */ 1796 if (v->gl_visual->DBflag) { 1797 if (v->ximage_flag) { 1798 b->db_state = BACK_XIMAGE; 1799 } 1800 else { 1801 b->db_state = BACK_PIXMAP; 1802 } 1803 } 1804 else { 1805 b->db_state = 0; 1806 } 1807 1808 b->gl_buffer = _mesa_create_framebuffer( v->gl_visual, 1809 v->gl_visual->DepthBits > 0, 1810 v->gl_visual->StencilBits > 0, 1811 v->gl_visual->AccumRedBits > 0, 1812 v->gl_visual->AlphaBits > 0 ); 1813 if (!b->gl_buffer) { 1814 free_xmesa_buffer(client, b); 1815 return NULL; 1816 } 1817 1818 if (!initialize_visual_and_buffer( client, v, b, v->gl_visual->RGBAflag, 1819 (XMesaDrawable)w, b->cmap )) { 1820 _mesa_destroy_framebuffer( b->gl_buffer ); 1821 free_xmesa_buffer(client, b); 1822 return NULL; 1823 } 1824 1825#ifdef FX 1826 fxEnvVar = getenv("MESA_GLX_FX"); 1827 if (fxEnvVar) { 1828 if (fxEnvVar[0]!='d') { 1829 int attribs[100]; 1830 int numAttribs = 0; 1831 int hw; 1832 if (v->gl_visual->DepthBits > 0) { 1833 attribs[numAttribs++] = FXMESA_DEPTH_SIZE; 1834 attribs[numAttribs++] = 1; 1835 } 1836 if (v->gl_visual->DBflag) { 1837 attribs[numAttribs++] = FXMESA_DOUBLEBUFFER; 1838 } 1839 if (v->gl_visual->AccumRedBits > 0) { 1840 attribs[numAttribs++] = FXMESA_ACCUM_SIZE; 1841 attribs[numAttribs++] = v->gl_visual->AccumRedBits; 1842 } 1843 if (v->gl_visual->StencilBits > 0) { 1844 attribs[numAttribs++] = FXMESA_STENCIL_SIZE; 1845 attribs[numAttribs++] = v->gl_visual->StencilBits; 1846 } 1847 if (v->gl_visual->AlphaBits > 0) { 1848 attribs[numAttribs++] = FXMESA_ALPHA_SIZE; 1849 attribs[numAttribs++] = 1; 1850 } 1851 if (c->gl_ctx) { 1852#define FXMESA_SHARE_CONTEXT 990099 /* keep in sync with fxapi.c! */ 1853 attribs[numAttribs++] = FXMESA_SHARE_CONTEXT; 1854 attribs[numAttribs++] = (int) c->gl_ctx; 1855 } 1856 attribs[numAttribs++] = FXMESA_NONE; 1857 1858 if ((hw = fxQueryHardware())==GR_SSTTYPE_VOODOO) { 1859 b->FXctx = fxMesaCreateBestContext(0, b->width, b->height, attribs); 1860 if ((v->undithered_pf!=PF_INDEX) && (b->backimage)) { 1861 b->FXisHackUsable = b->FXctx ? GL_TRUE : GL_FALSE; 1862 if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W') 1863 b->FXwindowHack = b->FXctx ? GL_TRUE : GL_FALSE; 1864 else 1865 b->FXwindowHack = GL_FALSE; 1866 } 1867 } 1868 else { 1869 if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W') 1870 b->FXctx = fxMesaCreateContext(w, GR_RESOLUTION_NONE, 1871 GR_REFRESH_75Hz, attribs); 1872 else 1873 b->FXctx = fxMesaCreateBestContext(0, b->width, b->height, attribs); 1874 b->FXisHackUsable = GL_FALSE; 1875 b->FXwindowHack = GL_FALSE; 1876 } 1877 /* 1878 fprintf(stderr, 1879 "voodoo %d, wid %d height %d hack: usable %d active %d\n", 1880 hw, b->width, b->height, b->FXisHackUsable, b->FXwindowHack); 1881 */ 1882 } 1883 } 1884 else { 1885 fprintf(stderr,"WARNING: This Mesa Library includes the Glide driver but\n"); 1886 fprintf(stderr," you have not defined the MESA_GLX_FX env. var.\n"); 1887 fprintf(stderr," (check the README.3DFX file for more information).\n\n"); 1888 fprintf(stderr," you can disable this message with a 'export MESA_GLX_FX=disable'.\n"); 1889 } 1890#endif 1891 1892#if defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server) 1893 b->driDrawPriv = driDrawPriv; 1894#endif 1895 1896 return b; 1897} 1898 1899 1900XMesaBuffer XMesaCreateWindowBuffer( XMesaVisual v, XMesaWindow w ) 1901{ 1902 return XMesaCreateWindowBuffer2( v, w, NULL ); 1903} 1904 1905 1906/* 1907 * Create a new XMesaBuffer from an X pixmap. 1908 * Input: v - the XMesaVisual 1909 * p - the pixmap 1910 * cmap - the colormap, may be 0 if using a TrueColor or DirectColor 1911 * visual for the pixmap 1912 * Return: new XMesaBuffer or NULL if error 1913 */ 1914XMesaBuffer XMesaCreatePixmapBuffer( XMesaVisual v, 1915 XMesaPixmap p, XMesaColormap cmap ) 1916{ 1917 int client = 0; 1918 XMesaBuffer b = alloc_xmesa_buffer(); 1919 if (!b) { 1920 return NULL; 1921 } 1922 1923 1924#ifdef XFree86Server 1925 client = CLIENT_ID(((XMesaDrawable)p)->id); 1926#endif 1927 1928 assert(v); 1929 1930 b->xm_context = NULL; /* Associate no context with this buffer */ 1931 1932 b->xm_visual = v; 1933 b->pixmap_flag = GL_TRUE; 1934 b->display = v->display; 1935 b->cmap = cmap; 1936 1937 /* determine back buffer implementation */ 1938 if (v->gl_visual->DBflag) { 1939 if (v->ximage_flag) { 1940 b->db_state = BACK_XIMAGE; 1941 } 1942 else { 1943 b->db_state = BACK_PIXMAP; 1944 } 1945 } 1946 else { 1947 b->db_state = 0; 1948 } 1949 1950 b->gl_buffer = _mesa_create_framebuffer( v->gl_visual, 1951 v->gl_visual->DepthBits > 0, 1952 v->gl_visual->StencilBits > 0, 1953 v->gl_visual->AccumRedBits + 1954 v->gl_visual->AccumGreenBits + 1955 v->gl_visual->AccumBlueBits > 0, 1956 v->gl_visual->AlphaBits > 0 ); 1957 if (!b->gl_buffer) { 1958 free_xmesa_buffer(client, b); 1959 return NULL; 1960 } 1961 1962 if (!initialize_visual_and_buffer(client, v, b, v->gl_visual->RGBAflag, 1963 (XMesaDrawable)p, cmap)) { 1964 _mesa_destroy_framebuffer( b->gl_buffer ); 1965 free_xmesa_buffer(client, b); 1966 return NULL; 1967 } 1968 1969#if defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server) 1970 b->driDrawPriv = driDrawPriv; 1971#endif 1972 1973 return b; 1974} 1975 1976 1977 1978/* 1979 * Deallocate an XMesaBuffer structure and all related info. 1980 */ 1981void XMesaDestroyBuffer( XMesaBuffer b ) 1982{ 1983 int client = 0; 1984 1985#ifdef XFree86Server 1986 if (b->frontbuffer) 1987 client = CLIENT_ID(b->frontbuffer->id); 1988#endif 1989 1990 if (b->gc) XMesaFreeGC( b->xm_visual->display, b->gc ); 1991 if (b->cleargc) XMesaFreeGC( b->xm_visual->display, b->cleargc ); 1992 1993 if (b->backimage) { 1994#if defined(USE_XSHM) && !defined(XFree86Server) 1995 if (b->shm) { 1996 XShmDetach( b->xm_visual->display, &b->shminfo ); 1997 XDestroyImage( b->backimage ); 1998 shmdt( b->shminfo.shmaddr ); 1999 } 2000 else 2001#endif 2002 XMesaDestroyImage( b->backimage ); 2003 } 2004 if (b->backpixmap) { 2005 XMesaFreePixmap( b->xm_visual->display, b->backpixmap ); 2006 if (b->xm_visual->hpcr_clear_flag) { 2007 XMesaFreePixmap( b->xm_visual->display, 2008 b->xm_visual->hpcr_clear_pixmap ); 2009 XMesaDestroyImage( b->xm_visual->hpcr_clear_ximage ); 2010 } 2011 } 2012 if (b->rowimage) { 2013 FREE( b->rowimage->data ); 2014 b->rowimage->data = NULL; 2015 XMesaDestroyImage( b->rowimage ); 2016 } 2017 2018 if (b->xm_context) 2019 b->xm_context->xm_buffer = NULL; 2020 2021 _mesa_destroy_framebuffer( b->gl_buffer ); 2022 free_xmesa_buffer(client, b); 2023} 2024 2025 2026 2027/* 2028 * Bind buffer b to context c and make c the current rendering context. 2029 */ 2030GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b ) 2031{ 2032 return XMesaMakeCurrent2( c, b, b ); 2033} 2034 2035 2036/* 2037 * Bind buffer b to context c and make c the current rendering context. 2038 */ 2039GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, 2040 XMesaBuffer readBuffer ) 2041{ 2042 if (c) { 2043 if (!drawBuffer || !readBuffer) 2044 return GL_FALSE; /* must specify buffers! */ 2045 2046#ifdef FX 2047 if (drawBuffer->FXctx) { 2048 fxMesaMakeCurrent(drawBuffer->FXctx); 2049 2050 /* Disassociate old buffer from this context */ 2051 if (c->xm_buffer) 2052 c->xm_buffer->xm_context = NULL; 2053 2054 /* Associate the context with this buffer */ 2055 drawBuffer->xm_context = c; 2056 2057 c->xm_buffer = drawBuffer; 2058 c->xm_read_buffer = readBuffer; 2059 c->use_read_buffer = (drawBuffer != readBuffer); 2060 2061 return GL_TRUE; 2062 } 2063#endif 2064 if (c->gl_ctx == _mesa_get_current_context() 2065 && c->xm_buffer == drawBuffer 2066 && c->xm_read_buffer == readBuffer 2067 && c->xm_buffer->wasCurrent) { 2068 /* same context and buffer, do nothing */ 2069 return GL_TRUE; 2070 } 2071 2072 /* Disassociate old buffer with this context */ 2073 if (c->xm_buffer) 2074 c->xm_buffer->xm_context = NULL; 2075 drawBuffer->xm_context = c; /* Associate the context with this buffer */ 2076 2077 c->xm_buffer = drawBuffer; 2078 c->xm_read_buffer = readBuffer; 2079 c->use_read_buffer = (drawBuffer != readBuffer); 2080 2081 _mesa_make_current2(c->gl_ctx, drawBuffer->gl_buffer, readBuffer->gl_buffer); 2082 2083 if (c->gl_ctx->Viewport.Width == 0) { 2084 /* initialize viewport to window size */ 2085 _mesa_Viewport( 0, 0, drawBuffer->width, drawBuffer->height ); 2086 c->gl_ctx->Scissor.Width = drawBuffer->width; 2087 c->gl_ctx->Scissor.Height = drawBuffer->height; 2088 } 2089 2090 if (c->xm_visual->gl_visual->RGBAflag) { 2091 /* 2092 * Must recompute and set these pixel values because colormap 2093 * can be different for different windows. 2094 */ 2095 c->clearpixel = xmesa_color_to_pixel( c, 2096 c->clearcolor[0], 2097 c->clearcolor[1], 2098 c->clearcolor[2], 2099 c->clearcolor[3], 2100 c->xm_visual->undithered_pf); 2101 XMesaSetForeground(c->display, c->xm_buffer->cleargc, c->clearpixel); 2102 } 2103 2104 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 2105 c->xm_buffer->wasCurrent = GL_TRUE; 2106 } 2107 else { 2108 /* Detach */ 2109 _mesa_make_current2( NULL, NULL, NULL ); 2110 } 2111 return GL_TRUE; 2112} 2113 2114 2115/* 2116 * Unbind the context c from its buffer. 2117 */ 2118GLboolean XMesaUnbindContext( XMesaContext c ) 2119{ 2120 /* A no-op for XFree86 integration purposes */ 2121 return GL_TRUE; 2122} 2123 2124 2125XMesaContext XMesaGetCurrentContext( void ) 2126{ 2127 GET_CURRENT_CONTEXT(ctx); 2128 if (ctx) { 2129 XMesaContext xmesa = (XMesaContext) ctx->DriverCtx; 2130 return xmesa; 2131 } 2132 else { 2133 return 0; 2134 } 2135} 2136 2137 2138XMesaBuffer XMesaGetCurrentBuffer( void ) 2139{ 2140 GET_CURRENT_CONTEXT(ctx); 2141 if (ctx) { 2142 XMesaContext xmesa = (XMesaContext) ctx->DriverCtx; 2143 return xmesa->xm_buffer; 2144 } 2145 else { 2146 return 0; 2147 } 2148} 2149 2150 2151/* New in Mesa 3.1 */ 2152XMesaBuffer XMesaGetCurrentReadBuffer( void ) 2153{ 2154 GET_CURRENT_CONTEXT(ctx); 2155 if (ctx) { 2156 XMesaContext xmesa = (XMesaContext) ctx->DriverCtx; 2157 return xmesa->xm_buffer; 2158 } 2159 else { 2160 return 0; 2161 } 2162} 2163 2164 2165GLboolean XMesaForceCurrent(XMesaContext c) 2166{ 2167 if (c) { 2168 if (c->gl_ctx != _mesa_get_current_context()) { 2169 _mesa_make_current(c->gl_ctx, c->xm_buffer->gl_buffer); 2170 } 2171 } 2172 else { 2173 _mesa_make_current(NULL, NULL); 2174 } 2175 return GL_TRUE; 2176} 2177 2178 2179GLboolean XMesaLoseCurrent(XMesaContext c) 2180{ 2181 (void) c; 2182 _mesa_make_current(NULL, NULL); 2183 return GL_TRUE; 2184} 2185 2186 2187/* 2188 * Switch 3Dfx support hack between window and full-screen mode. 2189 */ 2190GLboolean XMesaSetFXmode( GLint mode ) 2191{ 2192#ifdef FX 2193 const char *fx = getenv("MESA_GLX_FX"); 2194 if (fx && fx[0] != 'd') { 2195 GET_CURRENT_CONTEXT(ctx); 2196 GrHwConfiguration hw; 2197 if (!FX_grSstQueryHardware(&hw)) { 2198 /*fprintf(stderr, "!grSstQueryHardware\n");*/ 2199 return GL_FALSE; 2200 } 2201 if (hw.num_sst < 1) { 2202 /*fprintf(stderr, "hw.num_sst < 1\n");*/ 2203 return GL_FALSE; 2204 } 2205 if (ctx) { 2206 XMesaContext xmesa = (XMesaContext) ctx->DriverCtx; 2207 if (mode == XMESA_FX_WINDOW) { 2208 if (xmesa->xm_buffer->FXisHackUsable) { 2209 FX_grSstControl(GR_CONTROL_DEACTIVATE); 2210 xmesa->xm_buffer->FXwindowHack = GL_TRUE; 2211 return GL_TRUE; 2212 } 2213 } 2214 else if (mode == XMESA_FX_FULLSCREEN) { 2215 FX_grSstControl(GR_CONTROL_ACTIVATE); 2216 xmesa->xm_buffer->FXwindowHack = GL_FALSE; 2217 return GL_TRUE; 2218 } 2219 else { 2220 /* Error: Bad mode value */ 2221 } 2222 } 2223 } 2224 /*fprintf(stderr, "fallthrough\n");*/ 2225#else 2226 (void) mode; 2227#endif 2228 return GL_FALSE; 2229} 2230 2231 2232 2233#ifdef FX 2234/* 2235 * Read image from VooDoo frame buffer into X/Mesa's back XImage. 2236 */ 2237static void FXgetImage( XMesaBuffer b ) 2238{ 2239 static unsigned short pixbuf[MAX_WIDTH]; 2240 int x, y; 2241 XMesaWindow root; 2242 unsigned int bw, depth, width, height; 2243 XMesaContext xmesa = (XMesaContext) b->xm_context->gl_ctx->DriverCtx; 2244 2245 assert(xmesa->xm_buffer->FXctx); 2246 2247#ifdef XFree86Server 2248 x = b->frontbuffer->x; 2249 y = b->frontbuffer->y; 2250 width = b->frontbuffer->width; 2251 height = b->frontbuffer->height; 2252 depth = b->frontbuffer->depth; 2253#else 2254 XGetGeometry( xmesa->xm_visual->display, b->frontbuffer, 2255 &root, &x, &y, &width, &height, &bw, &depth); 2256#endif 2257 if (b->width != width || b->height != height) { 2258 b->width = MIN2((int)width, xmesa->xm_buffer->FXctx->width); 2259 b->height = MIN2((int)height, xmesa->xm_buffer->FXctx->height); 2260 if (b->width & 1) 2261 b->width--; /* prevent odd width */ 2262 xmesa_alloc_back_buffer( b ); 2263 } 2264 2265 grLfbWriteColorFormat(GR_COLORFORMAT_ARGB); 2266 if (xmesa->xm_visual->undithered_pf==PF_5R6G5B) { 2267 /* Special case: 16bpp RGB */ 2268 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, /* src buffer */ 2269 0, xmesa->xm_buffer->FXctx->height - b->height, /*pos*/ 2270 b->width, b->height, /* size */ 2271 b->width * sizeof(GLushort), /* stride */ 2272 b->backimage->data); /* dest buffer */ 2273 } 2274 else if (xmesa->xm_visual->dithered_pf==PF_DITHER 2275 && GET_VISUAL_DEPTH(xmesa->xm_visual)==8) { 2276 /* Special case: 8bpp RGB */ 2277 for (y=0;y<b->height;y++) { 2278 GLubyte *ptr = (GLubyte*) xmesa->xm_buffer->backimage->data 2279 + xmesa->xm_buffer->backimage->bytes_per_line * y; 2280 XDITHER_SETUP(y); 2281 2282 /* read row from 3Dfx frame buffer */ 2283 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2284 0, xmesa->xm_buffer->FXctx->height-(b->height-y), 2285 b->width, 1, 2286 0, 2287 pixbuf ); 2288 2289 /* write to XImage back buffer */ 2290 for (x=0;x<b->width;x++) { 2291 GLubyte r = (pixbuf[x] & 0xf800) >> 8; 2292 GLubyte g = (pixbuf[x] & 0x07e0) >> 3; 2293 GLubyte b = (pixbuf[x] & 0x001f) << 3; 2294 *ptr++ = XDITHER( x, r, g, b); 2295 } 2296 } 2297 } 2298 else { 2299 /* General case: slow! */ 2300 for (y=0;y<b->height;y++) { 2301 /* read row from 3Dfx frame buffer */ 2302 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2303 0, xmesa->xm_buffer->FXctx->height-(b->height-y), 2304 b->width, 1, 2305 0, 2306 pixbuf ); 2307 2308 /* write to XImage back buffer */ 2309 for (x=0;x<b->width;x++) { 2310 XMesaPutPixel(b->backimage,x,y, 2311 xmesa_color_to_pixel(xmesa, 2312 (pixbuf[x] & 0xf800) >> 8, 2313 (pixbuf[x] & 0x07e0) >> 3, 2314 (pixbuf[x] & 0x001f) << 3, 2315 0xff, xmesa->pixelformat)); 2316 } 2317 } 2318 } 2319 grLfbWriteColorFormat(GR_COLORFORMAT_ABGR); 2320} 2321#endif 2322 2323 2324/* 2325 * Copy the back buffer to the front buffer. If there's no back buffer 2326 * this is a no-op. 2327 */ 2328void XMesaSwapBuffers( XMesaBuffer b ) 2329{ 2330 GET_CURRENT_CONTEXT(ctx); 2331 2332 /* If we're swapping the buffer associated with the current context 2333 * we have to flush any pending rendering commands first. 2334 */ 2335 if (b->xm_context && b->xm_context->gl_ctx == ctx) 2336 _mesa_swapbuffers(ctx); 2337 2338 if (b->db_state) { 2339#ifdef FX 2340 if (b->FXctx) { 2341 fxMesaSwapBuffers(); 2342 2343 if (b->FXwindowHack) 2344 FXgetImage(b); 2345 else 2346 return; 2347 } 2348#endif 2349 if (b->backimage) { 2350 /* Copy Ximage from host's memory to server's window */ 2351#if defined(USE_XSHM) && !defined(XFree86Server) 2352 if (b->shm) { 2353 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2354 XShmPutImage( b->xm_visual->display, b->frontbuffer, 2355 b->cleargc, 2356 b->backimage, 0, 0, 2357 0, 0, b->width, b->height, False ); 2358 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2359 } 2360 else 2361#endif 2362 { 2363#if defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server) 2364 XMesaDriSwapBuffers( b ); 2365#else 2366 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2367 XMesaPutImage( b->xm_visual->display, b->frontbuffer, 2368 b->cleargc, 2369 b->backimage, 0, 0, 2370 0, 0, b->width, b->height ); 2371 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2372#endif 2373 } 2374 } 2375 else { 2376 /* Copy pixmap to window on server */ 2377 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2378 XMesaCopyArea( b->xm_visual->display, 2379 b->backpixmap, /* source drawable */ 2380 b->frontbuffer, /* dest. drawable */ 2381 b->cleargc, 2382 0, 0, b->width, b->height, /* source region */ 2383 0, 0 /* dest region */ 2384 ); 2385 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2386 } 2387 } 2388#if !defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server) 2389 XSync( b->xm_visual->display, False ); 2390#endif 2391} 2392 2393 2394 2395/* 2396 * Copy sub-region of back buffer to front buffer 2397 */ 2398void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 2399{ 2400 GET_CURRENT_CONTEXT(ctx); 2401 2402 /* If we're swapping the buffer associated with the current context 2403 * we have to flush any pending rendering commands first. 2404 */ 2405 if (b->xm_context->gl_ctx == ctx) 2406 _mesa_swapbuffers(ctx); 2407 2408 if (b->db_state) { 2409 int yTop = b->bottom - y - height; 2410#ifdef FX 2411 if (b->FXctx) { 2412 fxMesaSwapBuffers(); 2413 if (b->FXwindowHack) 2414 FXgetImage(b); 2415 else 2416 return; 2417 } 2418#endif 2419 if (b->backimage) { 2420 /* Copy Ximage from host's memory to server's window */ 2421#if defined(USE_XSHM) && !defined(XFree86Server) 2422 if (b->shm) { 2423 /* XXX assuming width and height aren't too large! */ 2424 XShmPutImage( b->xm_visual->display, b->frontbuffer, 2425 b->cleargc, 2426 b->backimage, x, yTop, 2427 x, yTop, width, height, False ); 2428 /* wait for finished event??? */ 2429 } 2430 else 2431#endif 2432 { 2433 /* XXX assuming width and height aren't too large! */ 2434 XMesaPutImage( b->xm_visual->display, b->frontbuffer, 2435 b->cleargc, 2436 b->backimage, x, yTop, 2437 x, yTop, width, height ); 2438 } 2439 } 2440 else { 2441 /* Copy pixmap to window on server */ 2442 XMesaCopyArea( b->xm_visual->display, 2443 b->backpixmap, /* source drawable */ 2444 b->frontbuffer, /* dest. drawable */ 2445 b->cleargc, 2446 x, yTop, width, height, /* source region */ 2447 x, yTop /* dest region */ 2448 ); 2449 } 2450 } 2451} 2452 2453 2454/* 2455 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function 2456 * is a way to get "under the hood" of X/Mesa so one can manipulate the 2457 * back buffer directly. 2458 * Output: pixmap - pointer to back buffer's Pixmap, or 0 2459 * ximage - pointer to back buffer's XImage, or NULL 2460 * Return: GL_TRUE = context is double buffered 2461 * GL_FALSE = context is single buffered 2462 */ 2463GLboolean XMesaGetBackBuffer( XMesaBuffer b, 2464 XMesaPixmap *pixmap, 2465 XMesaImage **ximage ) 2466{ 2467 if (b->db_state) { 2468 if (pixmap) *pixmap = b->backpixmap; 2469 if (ximage) *ximage = b->backimage; 2470 return GL_TRUE; 2471 } 2472 else { 2473 *pixmap = 0; 2474 *ximage = NULL; 2475 return GL_FALSE; 2476 } 2477} 2478 2479 2480/* 2481 * Return the depth buffer associated with an XMesaBuffer. 2482 * Input: b - the XMesa buffer handle 2483 * Output: width, height - size of buffer in pixels 2484 * bytesPerValue - bytes per depth value (2 or 4) 2485 * buffer - pointer to depth buffer values 2486 * Return: GL_TRUE or GL_FALSE to indicate success or failure. 2487 */ 2488GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height, 2489 GLint *bytesPerValue, void **buffer ) 2490{ 2491 if ((!b->gl_buffer) || (!b->gl_buffer->DepthBuffer)) { 2492 *width = 0; 2493 *height = 0; 2494 *bytesPerValue = 0; 2495 *buffer = 0; 2496 return GL_FALSE; 2497 } 2498 else { 2499 *width = b->gl_buffer->Width; 2500 *height = b->gl_buffer->Height; 2501 *bytesPerValue = sizeof(GLdepth); 2502 *buffer = b->gl_buffer->DepthBuffer; 2503 return GL_TRUE; 2504 } 2505} 2506 2507 2508void XMesaFlush( XMesaContext c ) 2509{ 2510 if (c && c->xm_visual) { 2511#ifdef XFree86Server 2512 /* NOT_NEEDED */ 2513#else 2514 XSync( c->xm_visual->display, False ); 2515#endif 2516 } 2517} 2518 2519 2520 2521const char *XMesaGetString( XMesaContext c, int name ) 2522{ 2523 (void) c; 2524 if (name==XMESA_VERSION) { 2525 return "3.1"; 2526 } 2527 else if (name==XMESA_EXTENSIONS) { 2528 return ""; 2529 } 2530 else { 2531 return NULL; 2532 } 2533} 2534 2535 2536 2537XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d ) 2538{ 2539 XMesaBuffer b; 2540 for (b=XMesaBufferList; b; b=b->Next) { 2541 if (b->frontbuffer==d && b->display==dpy) { 2542 return b; 2543 } 2544 } 2545 return NULL; 2546} 2547 2548 2549 2550/* 2551 * Look for XMesaBuffers whose X window has been destroyed. 2552 * Deallocate any such XMesaBuffers. 2553 */ 2554void XMesaGarbageCollect( void ) 2555{ 2556 XMesaBuffer b, next; 2557 for (b=XMesaBufferList; b; b=next) { 2558 next = b->Next; 2559 if (!b->pixmap_flag) { 2560#ifdef XFree86Server 2561 /* NOT_NEEDED */ 2562#else 2563 XSync(b->display, False); 2564 if (!window_exists( b->display, b->frontbuffer )) { 2565 /* found a dead window, free the ancillary info */ 2566 XMesaDestroyBuffer( b ); 2567 } 2568#endif 2569 } 2570 } 2571} 2572 2573 2574void XMesaReset( void ) 2575{ 2576 while (XMesaBufferList) 2577 XMesaDestroyBuffer(XMesaBufferList); 2578 2579 XMesaBufferList = NULL; 2580} 2581 2582 2583unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y, 2584 GLfloat red, GLfloat green, 2585 GLfloat blue, GLfloat alpha ) 2586{ 2587 GLint r = (GLint) (red * 255.0F); 2588 GLint g = (GLint) (green * 255.0F); 2589 GLint b = (GLint) (blue * 255.0F); 2590 GLint a = (GLint) (alpha * 255.0F); 2591 2592 switch (xmesa->pixelformat) { 2593 case PF_INDEX: 2594 return 0; 2595 case PF_TRUECOLOR: 2596 { 2597 unsigned long p; 2598 PACK_TRUECOLOR( p, r, g, b ); 2599 return p; 2600 } 2601 case PF_8A8B8G8R: 2602 return PACK_8A8B8G8R( r, g, b, a ); 2603 case PF_8R8G8B: 2604 return PACK_8R8G8B( r, g, b ); 2605 case PF_5R6G5B: 2606 return PACK_5R6G5B( r, g, b ); 2607 case PF_DITHER: 2608 { 2609 DITHER_SETUP; 2610 return DITHER( x, y, r, g, b ); 2611 } 2612 case PF_1BIT: 2613 /* 382 = (3*255)/2 */ 2614 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 2615 case PF_HPCR: 2616 return DITHER_HPCR(x, y, r, g, b); 2617 case PF_LOOKUP: 2618 { 2619 LOOKUP_SETUP; 2620 return LOOKUP( r, g, b ); 2621 } 2622 case PF_GRAYSCALE: 2623 return GRAY_RGB( r, g, b ); 2624 case PF_DITHER_5R6G5B: 2625 /* fall through */ 2626 case PF_TRUEDITHER: 2627 { 2628 unsigned long p; 2629 PACK_TRUEDITHER(p, x, y, r, g, b); 2630 return p; 2631 } 2632 default: 2633 gl_problem(NULL, "Bad pixel format in XMesaDitherColor"); 2634 } 2635 return 0; 2636} 2637 2638 2639