xm_api.c revision 5c4ca968fab1b0b993fabeb73e3a5d92cbaadaf1
1dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com/* 2dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * Mesa 3-D graphics library 3dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * Version: 7.1 4dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * 5dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * Copyright (C) 1999-2007 Brian Paul All Rights Reserved. 6dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * 7dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * Permission is hereby granted, free of charge, to any person obtaining a 8dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * copy of this software and associated documentation files (the "Software"), 9dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * to deal in the Software without restriction, including without limitation 10dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * the rights to use, copy, modify, merge, publish, distribute, sublicense, 11dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * and/or sell copies of the Software, and to permit persons to whom the 12dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * Software is furnished to do so, subject to the following conditions: 13dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * 14dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * The above copyright notice and this permission notice shall be included 15dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * in all copies or substantial portions of the Software. 16dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * 17dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 18dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN 21dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 22dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 23dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com */ 24dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 25dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com/** 26dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * \file xm_api.c 27dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * 28dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * All the XMesa* API functions. 29dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * 30dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * 31dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * NOTES: 32dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * 33dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * The window coordinate system origin (0,0) is in the lower-left corner 34dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * of the window. X11's window coordinate origin is in the upper-left 35dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * corner of the window. Therefore, most drawing functions in this 36dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * file have to flip Y coordinates. 37dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * 38dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * Define USE_XSHM in the Makefile with -DUSE_XSHM if you want to compile 39dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * in support for the MIT Shared Memory extension. If enabled, when you 40dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * use an Ximage for the back buffer in double buffered mode, the "swap" 41dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * operation will be faster. You must also link with -lXext. 42dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * 43dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * Byte swapping: If the Mesa host and the X display use a different 44dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * byte order then there's some trickiness to be aware of when using 45dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * XImages. The byte ordering used for the XImage is that of the X 46dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * display, not the Mesa host. 47dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * The color-to-pixel encoding for True/DirectColor must be done 48dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * according to the display's visual red_mask, green_mask, and blue_mask. 49dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * If XPutPixel is used to put a pixel into an XImage then XPutPixel will 50dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * do byte swapping if needed. If one wants to directly "poke" the pixel 51dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * into the XImage's buffer then the pixel must be byte swapped first. In 52dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * Mesa, when byte swapping is needed we use the PF_TRUECOLOR pixel format 53dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * and use XPutPixel everywhere except in the implementation of 54dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * glClear(GL_COLOR_BUFFER_BIT). We want this function to be fast so 55dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * instead of using XPutPixel we "poke" our values after byte-swapping 56dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * the clear pixel value if needed. 57dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * 58dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com */ 59dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 60dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#ifdef __CYGWIN__ 61dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#undef WIN32 62dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#undef __WIN32__ 63dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#endif 64dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 65dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#include "glxheader.h" 66dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#include "GL/xmesa.h" 67dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#include "xmesaP.h" 68dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#include "context.h" 69dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#include "extensions.h" 70dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#include "framebuffer.h" 71dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#include "glthread.h" 72dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#include "imports.h" 73dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#include "macros.h" 74dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#include "renderbuffer.h" 75dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#include "teximage.h" 76dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#include "swrast/swrast.h" 77dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#include "swrast_setup/swrast_setup.h" 78dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#include "vbo/vbo.h" 79dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#include "tnl/tnl.h" 80dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#include "tnl/t_context.h" 81dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#include "tnl/t_pipeline.h" 82dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#include "drivers/common/driverfuncs.h" 83dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 84dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com/** 85dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * Global X driver lock 86dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com */ 87dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com_glthread_Mutex _xmesa_lock; 88dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 89dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 90dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 91dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com/** 92dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * Lookup tables for HPCR pixel format: 93dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com */ 94dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comstatic short hpcr_rgbTbl[3][256] = { 95dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com{ 96dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 97dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 98dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 99dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 100dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 101dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 102dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 103dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 104dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 105dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 106dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 107dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 108dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 109dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 110dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 111dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 112dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com}, 113dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com{ 114dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 115dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 116dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 117dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 118dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 119dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 120dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 121dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 122dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 123dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 124dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 125dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 126dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 127dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 128dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 129dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 130dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com}, 131dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com{ 132dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 133dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 40, 40, 41, 41, 42, 42, 43, 43, 44, 44, 45, 45, 46, 46, 47, 47, 134dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 48, 48, 49, 49, 50, 50, 51, 51, 52, 52, 53, 53, 54, 54, 55, 55, 135dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 56, 56, 57, 57, 58, 58, 59, 59, 60, 60, 61, 61, 62, 62, 63, 63, 136dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 64, 64, 65, 65, 66, 66, 67, 67, 68, 68, 69, 69, 70, 70, 71, 71, 137dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 72, 72, 73, 73, 74, 74, 75, 75, 76, 76, 77, 77, 78, 78, 79, 79, 138dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 80, 80, 81, 81, 82, 82, 83, 83, 84, 84, 85, 85, 86, 86, 87, 87, 139dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 140dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 141dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 142dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 143dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 144dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 145dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 146dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 147dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223 148dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 149dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com}; 150dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 151dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 152dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 153dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com/**********************************************************************/ 154dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com/***** X Utility Functions *****/ 155dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com/**********************************************************************/ 156dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 157dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 158dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com/** 159dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * Return the host's byte order as LSBFirst or MSBFirst ala X. 160dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com */ 161dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#ifndef XFree86Server 162dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comstatic int host_byte_order( void ) 163dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com{ 164dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com int i = 1; 165dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com char *cptr = (char *) &i; 166dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return (*cptr==1) ? LSBFirst : MSBFirst; 167dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 168dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#endif 169dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 170dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 171dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com/** 172dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * Check if the X Shared Memory extension is available. 173dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * Return: 0 = not available 174dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * 1 = shared XImage support available 175dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * 2 = shared Pixmap support available also 176dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com */ 177dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comstatic int check_for_xshm( XMesaDisplay *display ) 178dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com{ 179dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#if defined(USE_XSHM) && !defined(XFree86Server) 180dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com int major, minor, ignore; 181dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com Bool pixmaps; 182dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 183dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) { 184dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (XShmQueryVersion( display, &major, &minor, &pixmaps )==True) { 185dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return (pixmaps==True) ? 2 : 1; 186dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 187dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com else { 188dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return 0; 189dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 190dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 191dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com else { 192dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return 0; 193dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 194dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#else 195dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com /* No XSHM support */ 196dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return 0; 197dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com#endif 198dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com} 199dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 200dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com 201dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com/** 202dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * Apply gamma correction to an intensity value in [0..max]. Return the 203dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com * new intensity value. 204dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com */ 205dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comstatic GLint 206dff7e11c2000d6745261de046d76b1500a05ece9reed@google.comgamma_adjust( GLfloat gamma, GLint value, GLint max ) 207dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com{ 208dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com if (gamma == 1.0) { 209dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com return value; 210dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com } 211dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com else { 212dff7e11c2000d6745261de046d76b1500a05ece9reed@google.com double x = (double) value / (double) max; 213 return IROUND_POS((GLfloat) max * _mesa_pow(x, 1.0F/gamma)); 214 } 215} 216 217 218 219/** 220 * Return the true number of bits per pixel for XImages. 221 * For example, if we request a 24-bit deep visual we may actually need/get 222 * 32bpp XImages. This function returns the appropriate bpp. 223 * Input: dpy - the X display 224 * visinfo - desribes the visual to be used for XImages 225 * Return: true number of bits per pixel for XImages 226 */ 227static int 228bits_per_pixel( XMesaVisual xmv ) 229{ 230#ifdef XFree86Server 231 const int depth = xmv->nplanes; 232 int i; 233 assert(depth > 0); 234 for (i = 0; i < screenInfo.numPixmapFormats; i++) { 235 if (screenInfo.formats[i].depth == depth) 236 return screenInfo.formats[i].bitsPerPixel; 237 } 238 return depth; /* should never get here, but this should be safe */ 239#else 240 XMesaDisplay *dpy = xmv->display; 241 XMesaVisualInfo visinfo = xmv->visinfo; 242 XMesaImage *img; 243 int bitsPerPixel; 244 /* Create a temporary XImage */ 245 img = XCreateImage( dpy, visinfo->visual, visinfo->depth, 246 ZPixmap, 0, /*format, offset*/ 247 (char*) MALLOC(8), /*data*/ 248 1, 1, /*width, height*/ 249 32, /*bitmap_pad*/ 250 0 /*bytes_per_line*/ 251 ); 252 assert(img); 253 /* grab the bits/pixel value */ 254 bitsPerPixel = img->bits_per_pixel; 255 /* free the XImage */ 256 _mesa_free( img->data ); 257 img->data = NULL; 258 XMesaDestroyImage( img ); 259 return bitsPerPixel; 260#endif 261} 262 263 264 265/* 266 * Determine if a given X window ID is valid (window exists). 267 * Do this by calling XGetWindowAttributes() for the window and 268 * checking if we catch an X error. 269 * Input: dpy - the display 270 * win - the window to check for existance 271 * Return: GL_TRUE - window exists 272 * GL_FALSE - window doesn't exist 273 */ 274#ifndef XFree86Server 275static GLboolean WindowExistsFlag; 276 277static int window_exists_err_handler( XMesaDisplay* dpy, XErrorEvent* xerr ) 278{ 279 (void) dpy; 280 if (xerr->error_code == BadWindow) { 281 WindowExistsFlag = GL_FALSE; 282 } 283 return 0; 284} 285 286static GLboolean window_exists( XMesaDisplay *dpy, Window win ) 287{ 288 XWindowAttributes wa; 289 int (*old_handler)( XMesaDisplay*, XErrorEvent* ); 290 WindowExistsFlag = GL_TRUE; 291 old_handler = XSetErrorHandler(window_exists_err_handler); 292 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */ 293 XSetErrorHandler(old_handler); 294 return WindowExistsFlag; 295} 296 297static Status 298get_drawable_size( XMesaDisplay *dpy, Drawable d, GLuint *width, GLuint *height ) 299{ 300 Window root; 301 Status stat; 302 int xpos, ypos; 303 unsigned int w, h, bw, depth; 304 stat = XGetGeometry(dpy, d, &root, &xpos, &ypos, &w, &h, &bw, &depth); 305 *width = w; 306 *height = h; 307 return stat; 308} 309#endif 310 311 312/** 313 * Return the size of the window (or pixmap) that corresponds to the 314 * given XMesaBuffer. 315 * \param width returns width in pixels 316 * \param height returns height in pixels 317 */ 318void 319xmesa_get_window_size(XMesaDisplay *dpy, XMesaBuffer b, 320 GLuint *width, GLuint *height) 321{ 322#ifdef XFree86Server 323 *width = MIN2(b->frontxrb->drawable->width, MAX_WIDTH); 324 *height = MIN2(b->frontxrb->drawable->height, MAX_HEIGHT); 325#else 326 Status stat; 327 328 _glthread_LOCK_MUTEX(_xmesa_lock); 329 XSync(b->xm_visual->display, 0); /* added for Chromium */ 330 stat = get_drawable_size(dpy, b->frontxrb->pixmap, width, height); 331 _glthread_UNLOCK_MUTEX(_xmesa_lock); 332 333 if (!stat) { 334 /* probably querying a window that's recently been destroyed */ 335 _mesa_warning(NULL, "XGetGeometry failed!\n"); 336 *width = *height = 1; 337 } 338#endif 339} 340 341 342 343/**********************************************************************/ 344/***** Linked list of XMesaBuffers *****/ 345/**********************************************************************/ 346 347XMesaBuffer XMesaBufferList = NULL; 348 349 350/** 351 * Allocate a new XMesaBuffer object which corresponds to the given drawable. 352 * Note that XMesaBuffer is derived from GLframebuffer. 353 * The new XMesaBuffer will not have any size (Width=Height=0). 354 * 355 * \param d the corresponding X drawable (window or pixmap) 356 * \param type either WINDOW, PIXMAP or PBUFFER, describing d 357 * \param vis the buffer's visual 358 * \param cmap the window's colormap, if known. 359 * \return new XMesaBuffer or NULL if any problem 360 */ 361static XMesaBuffer 362create_xmesa_buffer(XMesaDrawable d, BufferType type, 363 XMesaVisual vis, XMesaColormap cmap) 364{ 365 XMesaBuffer b; 366 367 ASSERT(type == WINDOW || type == PIXMAP || type == PBUFFER); 368 369 b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer); 370 if (!b) 371 return NULL; 372 373 b->display = vis->display; 374 b->xm_visual = vis; 375 b->type = type; 376 b->cmap = cmap; 377 378 _mesa_initialize_framebuffer(&b->mesa_buffer, &vis->mesa_visual); 379 b->mesa_buffer.Delete = xmesa_delete_framebuffer; 380 381 /* 382 * Front renderbuffer 383 */ 384 b->frontxrb = xmesa_new_renderbuffer(NULL, 0, &vis->mesa_visual, GL_FALSE); 385 if (!b->frontxrb) { 386 _mesa_free(b); 387 return NULL; 388 } 389 b->frontxrb->Parent = b; 390 b->frontxrb->drawable = d; 391 b->frontxrb->pixmap = (XMesaPixmap) d; 392 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_FRONT_LEFT, 393 &b->frontxrb->Base); 394 395 /* 396 * Back renderbuffer 397 */ 398 if (vis->mesa_visual.doubleBufferMode) { 399 b->backxrb = xmesa_new_renderbuffer(NULL, 0, &vis->mesa_visual, GL_TRUE); 400 if (!b->backxrb) { 401 /* XXX free front xrb too */ 402 _mesa_free(b); 403 return NULL; 404 } 405 b->backxrb->Parent = b; 406 /* determine back buffer implementation */ 407 b->db_mode = vis->ximage_flag ? BACK_XIMAGE : BACK_PIXMAP; 408 409 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_BACK_LEFT, 410 &b->backxrb->Base); 411 } 412 413 /* 414 * Software alpha planes 415 */ 416 if (vis->mesa_visual.alphaBits > 0 417 && vis->undithered_pf != PF_8A8B8G8R 418 && vis->undithered_pf != PF_8A8R8G8B) { 419 /* Visual has alpha, but pixel format doesn't support it. 420 * We'll use an alpha renderbuffer wrapper. 421 */ 422 b->swAlpha = GL_TRUE; 423 } 424 else { 425 b->swAlpha = GL_FALSE; 426 } 427 428 /* 429 * Other renderbuffer (depth, stencil, etc) 430 */ 431 _mesa_add_soft_renderbuffers(&b->mesa_buffer, 432 GL_FALSE, /* color */ 433 vis->mesa_visual.haveDepthBuffer, 434 vis->mesa_visual.haveStencilBuffer, 435 vis->mesa_visual.haveAccumBuffer, 436 b->swAlpha, 437 vis->mesa_visual.numAuxBuffers > 0 ); 438 439 /* GLX_EXT_texture_from_pixmap */ 440 b->TextureTarget = 0; 441 b->TextureFormat = GLX_TEXTURE_FORMAT_NONE_EXT; 442 b->TextureMipmap = 0; 443 444 /* insert buffer into linked list */ 445 b->Next = XMesaBufferList; 446 XMesaBufferList = b; 447 448 return b; 449} 450 451 452/** 453 * Find an XMesaBuffer by matching X display and colormap but NOT matching 454 * the notThis buffer. 455 */ 456XMesaBuffer 457xmesa_find_buffer(XMesaDisplay *dpy, XMesaColormap cmap, XMesaBuffer notThis) 458{ 459 XMesaBuffer b; 460 for (b=XMesaBufferList; b; b=b->Next) { 461 if (b->display==dpy && b->cmap==cmap && b!=notThis) { 462 return b; 463 } 464 } 465 return NULL; 466} 467 468 469/** 470 * Remove buffer from linked list, delete if no longer referenced. 471 */ 472static void 473xmesa_free_buffer(XMesaBuffer buffer) 474{ 475 XMesaBuffer prev = NULL, b; 476 477 for (b = XMesaBufferList; b; b = b->Next) { 478 if (b == buffer) { 479 struct gl_framebuffer *fb = &buffer->mesa_buffer; 480 481 /* unlink buffer from list */ 482 if (prev) 483 prev->Next = buffer->Next; 484 else 485 XMesaBufferList = buffer->Next; 486 487 /* mark as delete pending */ 488 fb->DeletePending = GL_TRUE; 489 490 /* Since the X window for the XMesaBuffer is going away, we don't 491 * want to dereference this pointer in the future. 492 */ 493 b->frontxrb->drawable = 0; 494 495 /* Unreference. If count = zero we'll really delete the buffer */ 496 _mesa_unreference_framebuffer(&fb); 497 498 return; 499 } 500 /* continue search */ 501 prev = b; 502 } 503 /* buffer not found in XMesaBufferList */ 504 _mesa_problem(NULL,"xmesa_free_buffer() - buffer not found\n"); 505} 506 507 508/** 509 * Copy X color table stuff from one XMesaBuffer to another. 510 */ 511static void 512copy_colortable_info(XMesaBuffer dst, const XMesaBuffer src) 513{ 514 MEMCPY(dst->color_table, src->color_table, sizeof(src->color_table)); 515 MEMCPY(dst->pixel_to_r, src->pixel_to_r, sizeof(src->pixel_to_r)); 516 MEMCPY(dst->pixel_to_g, src->pixel_to_g, sizeof(src->pixel_to_g)); 517 MEMCPY(dst->pixel_to_b, src->pixel_to_b, sizeof(src->pixel_to_b)); 518 dst->num_alloced = src->num_alloced; 519 MEMCPY(dst->alloced_colors, src->alloced_colors, 520 sizeof(src->alloced_colors)); 521} 522 523 524 525/**********************************************************************/ 526/***** Misc Private Functions *****/ 527/**********************************************************************/ 528 529 530/** 531 * A replacement for XAllocColor. This function should never 532 * fail to allocate a color. When XAllocColor fails, we return 533 * the nearest matching color. If we have to allocate many colors 534 * this function isn't too efficient; the XQueryColors() could be 535 * done just once. 536 * Written by Michael Pichler, Brian Paul, Mark Kilgard 537 * Input: dpy - X display 538 * cmap - X colormap 539 * cmapSize - size of colormap 540 * In/Out: color - the XColor struct 541 * Output: exact - 1=exact color match, 0=closest match 542 * alloced - 1=XAlloc worked, 0=XAlloc failed 543 */ 544static void 545noFaultXAllocColor( int client, 546 XMesaDisplay *dpy, 547 XMesaColormap cmap, 548 int cmapSize, 549 XMesaColor *color, 550 int *exact, int *alloced ) 551{ 552#ifdef XFree86Server 553 Pixel *ppixIn; 554 xrgb *ctable; 555#else 556 /* we'll try to cache ctable for better remote display performance */ 557 static Display *prevDisplay = NULL; 558 static XMesaColormap prevCmap = 0; 559 static int prevCmapSize = 0; 560 static XMesaColor *ctable = NULL; 561#endif 562 XMesaColor subColor; 563 int i, bestmatch; 564 double mindist; /* 3*2^16^2 exceeds long int precision. */ 565 566 (void) client; 567 568 /* First try just using XAllocColor. */ 569#ifdef XFree86Server 570 if (AllocColor(cmap, 571 &color->red, &color->green, &color->blue, 572 &color->pixel, 573 client) == Success) 574#else 575 if (XAllocColor(dpy, cmap, color)) 576#endif 577 { 578 *exact = 1; 579 *alloced = 1; 580 return; 581 } 582 583 /* Alloc failed, search for closest match */ 584 585 /* Retrieve color table entries. */ 586 /* XXX alloca candidate. */ 587#ifdef XFree86Server 588 ppixIn = (Pixel *) MALLOC(cmapSize * sizeof(Pixel)); 589 ctable = (xrgb *) MALLOC(cmapSize * sizeof(xrgb)); 590 for (i = 0; i < cmapSize; i++) { 591 ppixIn[i] = i; 592 } 593 QueryColors(cmap, cmapSize, ppixIn, ctable); 594#else 595 if (prevDisplay != dpy || prevCmap != cmap 596 || prevCmapSize != cmapSize || !ctable) { 597 /* free previously cached color table */ 598 if (ctable) 599 _mesa_free(ctable); 600 /* Get the color table from X */ 601 ctable = (XMesaColor *) MALLOC(cmapSize * sizeof(XMesaColor)); 602 assert(ctable); 603 for (i = 0; i < cmapSize; i++) { 604 ctable[i].pixel = i; 605 } 606 XQueryColors(dpy, cmap, ctable, cmapSize); 607 prevDisplay = dpy; 608 prevCmap = cmap; 609 prevCmapSize = cmapSize; 610 } 611#endif 612 613 /* Find best match. */ 614 bestmatch = -1; 615 mindist = 0.0; 616 for (i = 0; i < cmapSize; i++) { 617 double dr = 0.30 * ((double) color->red - (double) ctable[i].red); 618 double dg = 0.59 * ((double) color->green - (double) ctable[i].green); 619 double db = 0.11 * ((double) color->blue - (double) ctable[i].blue); 620 double dist = dr * dr + dg * dg + db * db; 621 if (bestmatch < 0 || dist < mindist) { 622 bestmatch = i; 623 mindist = dist; 624 } 625 } 626 627 /* Return result. */ 628 subColor.red = ctable[bestmatch].red; 629 subColor.green = ctable[bestmatch].green; 630 subColor.blue = ctable[bestmatch].blue; 631 /* Try to allocate the closest match color. This should only 632 * fail if the cell is read/write. Otherwise, we're incrementing 633 * the cell's reference count. 634 */ 635#ifdef XFree86Server 636 if (AllocColor(cmap, 637 &subColor.red, &subColor.green, &subColor.blue, 638 &subColor.pixel, 639 client) == Success) { 640#else 641 if (XAllocColor(dpy, cmap, &subColor)) { 642#endif 643 *alloced = 1; 644 } 645 else { 646 /* do this to work around a problem reported by Frank Ortega */ 647 subColor.pixel = (unsigned long) bestmatch; 648 subColor.red = ctable[bestmatch].red; 649 subColor.green = ctable[bestmatch].green; 650 subColor.blue = ctable[bestmatch].blue; 651 subColor.flags = DoRed | DoGreen | DoBlue; 652 *alloced = 0; 653 } 654#ifdef XFree86Server 655 _mesa_free(ppixIn); 656 _mesa_free(ctable); 657#else 658 /* don't free table, save it for next time */ 659#endif 660 661 *color = subColor; 662 *exact = 0; 663} 664 665 666 667/** 668 * Do setup for PF_GRAYSCALE pixel format. 669 * Note that buffer may be NULL. 670 */ 671static GLboolean 672setup_grayscale(int client, XMesaVisual v, 673 XMesaBuffer buffer, XMesaColormap cmap) 674{ 675 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 676 return GL_FALSE; 677 } 678 679 if (buffer) { 680 XMesaBuffer prevBuffer; 681 682 if (!cmap) { 683 return GL_FALSE; 684 } 685 686 prevBuffer = xmesa_find_buffer(v->display, cmap, buffer); 687 if (prevBuffer && 688 (buffer->xm_visual->mesa_visual.rgbMode == 689 prevBuffer->xm_visual->mesa_visual.rgbMode)) { 690 /* Copy colormap stuff from previous XMesaBuffer which uses same 691 * X colormap. Do this to avoid time spent in noFaultXAllocColor. 692 */ 693 copy_colortable_info(buffer, prevBuffer); 694 } 695 else { 696 /* Allocate 256 shades of gray */ 697 int gray; 698 int colorsfailed = 0; 699 for (gray=0;gray<256;gray++) { 700 GLint r = gamma_adjust( v->RedGamma, gray, 255 ); 701 GLint g = gamma_adjust( v->GreenGamma, gray, 255 ); 702 GLint b = gamma_adjust( v->BlueGamma, gray, 255 ); 703 int exact, alloced; 704 XMesaColor xcol; 705 xcol.red = (r << 8) | r; 706 xcol.green = (g << 8) | g; 707 xcol.blue = (b << 8) | b; 708 noFaultXAllocColor( client, v->display, 709 cmap, GET_COLORMAP_SIZE(v), 710 &xcol, &exact, &alloced ); 711 if (!exact) { 712 colorsfailed++; 713 } 714 if (alloced) { 715 assert(buffer->num_alloced<256); 716 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 717 buffer->num_alloced++; 718 } 719 720 /*OLD 721 assert(gray < 576); 722 buffer->color_table[gray*3+0] = xcol.pixel; 723 buffer->color_table[gray*3+1] = xcol.pixel; 724 buffer->color_table[gray*3+2] = xcol.pixel; 725 assert(xcol.pixel < 65536); 726 buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100; 727 buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100; 728 buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100; 729 */ 730 buffer->color_table[gray] = xcol.pixel; 731 assert(xcol.pixel < 65536); 732 buffer->pixel_to_r[xcol.pixel] = gray; 733 buffer->pixel_to_g[xcol.pixel] = gray; 734 buffer->pixel_to_b[xcol.pixel] = gray; 735 } 736 737 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { 738 _mesa_warning(NULL, 739 "Note: %d out of 256 needed colors do not match exactly.\n", 740 colorsfailed ); 741 } 742 } 743 } 744 745 v->dithered_pf = PF_Grayscale; 746 v->undithered_pf = PF_Grayscale; 747 return GL_TRUE; 748} 749 750 751 752/** 753 * Setup RGB rendering for a window with a PseudoColor, StaticColor, 754 * or 8-bit TrueColor visual visual. We try to allocate a palette of 225 755 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB 756 * color. While this function was originally designed just for 8-bit 757 * visuals, it has also proven to work from 4-bit up to 16-bit visuals. 758 * Dithering code contributed by Bob Mercier. 759 */ 760static GLboolean 761setup_dithered_color(int client, XMesaVisual v, 762 XMesaBuffer buffer, XMesaColormap cmap) 763{ 764 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 765 return GL_FALSE; 766 } 767 768 if (buffer) { 769 XMesaBuffer prevBuffer; 770 771 if (!cmap) { 772 return GL_FALSE; 773 } 774 775 prevBuffer = xmesa_find_buffer(v->display, cmap, buffer); 776 if (prevBuffer && 777 (buffer->xm_visual->mesa_visual.rgbMode == 778 prevBuffer->xm_visual->mesa_visual.rgbMode)) { 779 /* Copy colormap stuff from previous, matching XMesaBuffer. 780 * Do this to avoid time spent in noFaultXAllocColor. 781 */ 782 copy_colortable_info(buffer, prevBuffer); 783 } 784 else { 785 /* Allocate X colors and initialize color_table[], red_table[], etc */ 786 int r, g, b, i; 787 int colorsfailed = 0; 788 for (r = 0; r < DITH_R; r++) { 789 for (g = 0; g < DITH_G; g++) { 790 for (b = 0; b < DITH_B; b++) { 791 XMesaColor xcol; 792 int exact, alloced; 793 xcol.red =gamma_adjust(v->RedGamma, r*65535/(DITH_R-1),65535); 794 xcol.green=gamma_adjust(v->GreenGamma, g*65535/(DITH_G-1),65535); 795 xcol.blue =gamma_adjust(v->BlueGamma, b*65535/(DITH_B-1),65535); 796 noFaultXAllocColor( client, v->display, 797 cmap, GET_COLORMAP_SIZE(v), 798 &xcol, &exact, &alloced ); 799 if (!exact) { 800 colorsfailed++; 801 } 802 if (alloced) { 803 assert(buffer->num_alloced<256); 804 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 805 buffer->num_alloced++; 806 } 807 i = DITH_MIX( r, g, b ); 808 assert(i < 576); 809 buffer->color_table[i] = xcol.pixel; 810 assert(xcol.pixel < 65536); 811 buffer->pixel_to_r[xcol.pixel] = r * 255 / (DITH_R-1); 812 buffer->pixel_to_g[xcol.pixel] = g * 255 / (DITH_G-1); 813 buffer->pixel_to_b[xcol.pixel] = b * 255 / (DITH_B-1); 814 } 815 } 816 } 817 818 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { 819 _mesa_warning(NULL, 820 "Note: %d out of %d needed colors do not match exactly.\n", 821 colorsfailed, DITH_R * DITH_G * DITH_B ); 822 } 823 } 824 } 825 826 v->dithered_pf = PF_Dither; 827 v->undithered_pf = PF_Lookup; 828 return GL_TRUE; 829} 830 831 832/** 833 * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode. 834 * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer. 835 * Special dithering tables have to be initialized. 836 */ 837static void 838setup_8bit_hpcr(XMesaVisual v) 839{ 840 /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be) 841 * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined 842 * on the root window AND the colormap obtainable by XGetRGBColormaps 843 * for that atom must be set on the window. (see also tkInitWindow) 844 * If that colormap is not set, the output will look stripy. 845 */ 846 847 /* Setup color tables with gamma correction */ 848 int i; 849 double g; 850 851 g = 1.0 / v->RedGamma; 852 for (i=0; i<256; i++) { 853 GLint red = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[0][i]/255.0, g )); 854 v->hpcr_rgbTbl[0][i] = CLAMP( red, 16, 239 ); 855 } 856 857 g = 1.0 / v->GreenGamma; 858 for (i=0; i<256; i++) { 859 GLint green = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[1][i]/255.0, g )); 860 v->hpcr_rgbTbl[1][i] = CLAMP( green, 16, 239 ); 861 } 862 863 g = 1.0 / v->BlueGamma; 864 for (i=0; i<256; i++) { 865 GLint blue = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[2][i]/255.0, g )); 866 v->hpcr_rgbTbl[2][i] = CLAMP( blue, 32, 223 ); 867 } 868 v->undithered_pf = PF_HPCR; /* can't really disable dithering for now */ 869 v->dithered_pf = PF_HPCR; 870 871 /* which method should I use to clear */ 872 /* GL_FALSE: keep the ordinary method */ 873 /* GL_TRUE : clear with dither pattern */ 874 v->hpcr_clear_flag = _mesa_getenv("MESA_HPCR_CLEAR") ? GL_TRUE : GL_FALSE; 875 876 if (v->hpcr_clear_flag) { 877 v->hpcr_clear_pixmap = XMesaCreatePixmap(v->display, 878 DefaultRootWindow(v->display), 879 16, 2, 8); 880#ifndef XFree86Server 881 v->hpcr_clear_ximage = XGetImage(v->display, v->hpcr_clear_pixmap, 882 0, 0, 16, 2, AllPlanes, ZPixmap); 883#endif 884 } 885} 886 887 888/** 889 * Setup RGB rendering for a window with a True/DirectColor visual. 890 */ 891static void 892setup_truecolor(XMesaVisual v, XMesaBuffer buffer, XMesaColormap cmap) 893{ 894 unsigned long rmask, gmask, bmask; 895 (void) buffer; 896 (void) cmap; 897 898 /* Compute red multiplier (mask) and bit shift */ 899 v->rshift = 0; 900 rmask = GET_REDMASK(v); 901 while ((rmask & 1)==0) { 902 v->rshift++; 903 rmask = rmask >> 1; 904 } 905 906 /* Compute green multiplier (mask) and bit shift */ 907 v->gshift = 0; 908 gmask = GET_GREENMASK(v); 909 while ((gmask & 1)==0) { 910 v->gshift++; 911 gmask = gmask >> 1; 912 } 913 914 /* Compute blue multiplier (mask) and bit shift */ 915 v->bshift = 0; 916 bmask = GET_BLUEMASK(v); 917 while ((bmask & 1)==0) { 918 v->bshift++; 919 bmask = bmask >> 1; 920 } 921 922 /* 923 * Compute component-to-pixel lookup tables and dithering kernel 924 */ 925 { 926 static GLubyte kernel[16] = { 927 0*16, 8*16, 2*16, 10*16, 928 12*16, 4*16, 14*16, 6*16, 929 3*16, 11*16, 1*16, 9*16, 930 15*16, 7*16, 13*16, 5*16, 931 }; 932 GLint rBits = _mesa_bitcount(rmask); 933 GLint gBits = _mesa_bitcount(gmask); 934 GLint bBits = _mesa_bitcount(bmask); 935 GLint maxBits; 936 GLuint i; 937 938 /* convert pixel components in [0,_mask] to RGB values in [0,255] */ 939 for (i=0; i<=rmask; i++) 940 v->PixelToR[i] = (unsigned char) ((i * 255) / rmask); 941 for (i=0; i<=gmask; i++) 942 v->PixelToG[i] = (unsigned char) ((i * 255) / gmask); 943 for (i=0; i<=bmask; i++) 944 v->PixelToB[i] = (unsigned char) ((i * 255) / bmask); 945 946 /* convert RGB values from [0,255] to pixel components */ 947 948 for (i=0;i<256;i++) { 949 GLint r = gamma_adjust(v->RedGamma, i, 255); 950 GLint g = gamma_adjust(v->GreenGamma, i, 255); 951 GLint b = gamma_adjust(v->BlueGamma, i, 255); 952 v->RtoPixel[i] = (r >> (8-rBits)) << v->rshift; 953 v->GtoPixel[i] = (g >> (8-gBits)) << v->gshift; 954 v->BtoPixel[i] = (b >> (8-bBits)) << v->bshift; 955 } 956 /* overflow protection */ 957 for (i=256;i<512;i++) { 958 v->RtoPixel[i] = v->RtoPixel[255]; 959 v->GtoPixel[i] = v->GtoPixel[255]; 960 v->BtoPixel[i] = v->BtoPixel[255]; 961 } 962 963 /* setup dithering kernel */ 964 maxBits = rBits; 965 if (gBits > maxBits) maxBits = gBits; 966 if (bBits > maxBits) maxBits = bBits; 967 for (i=0;i<16;i++) { 968 v->Kernel[i] = kernel[i] >> maxBits; 969 } 970 971 v->undithered_pf = PF_Truecolor; 972 v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_Dither_True : PF_Truecolor; 973 } 974 975 /* 976 * Now check for TrueColor visuals which we can optimize. 977 */ 978 if ( GET_REDMASK(v) ==0x0000ff 979 && GET_GREENMASK(v)==0x00ff00 980 && GET_BLUEMASK(v) ==0xff0000 981 && CHECK_BYTE_ORDER(v) 982 && v->BitsPerPixel==32 983 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 984 /* common 32 bpp config used on SGI, Sun */ 985 v->undithered_pf = v->dithered_pf = PF_8A8B8G8R; /* ABGR */ 986 } 987 else if (GET_REDMASK(v) == 0xff0000 988 && GET_GREENMASK(v)== 0x00ff00 989 && GET_BLUEMASK(v) == 0x0000ff 990 && CHECK_BYTE_ORDER(v) 991 && v->RedGamma == 1.0 && v->GreenGamma == 1.0 && v->BlueGamma == 1.0){ 992 if (v->BitsPerPixel==32) { 993 /* if 32 bpp, and visual indicates 8 bpp alpha channel */ 994 if (GET_VISUAL_DEPTH(v) == 32 && v->mesa_visual.alphaBits == 8) 995 v->undithered_pf = v->dithered_pf = PF_8A8R8G8B; /* ARGB */ 996 else 997 v->undithered_pf = v->dithered_pf = PF_8R8G8B; /* xRGB */ 998 } 999 else if (v->BitsPerPixel == 24) { 1000 v->undithered_pf = v->dithered_pf = PF_8R8G8B24; /* RGB */ 1001 } 1002 } 1003 else if (GET_REDMASK(v) ==0xf800 1004 && GET_GREENMASK(v)==0x07e0 1005 && GET_BLUEMASK(v) ==0x001f 1006 && CHECK_BYTE_ORDER(v) 1007 && v->BitsPerPixel==16 1008 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1009 /* 5-6-5 RGB */ 1010 v->undithered_pf = PF_5R6G5B; 1011 v->dithered_pf = PF_Dither_5R6G5B; 1012 } 1013 else if (GET_REDMASK(v) ==0xe0 1014 && GET_GREENMASK(v)==0x1c 1015 && GET_BLUEMASK(v) ==0x03 1016 && CHECK_FOR_HPCR(v)) { 1017 /* 8-bit HP color recovery */ 1018 setup_8bit_hpcr( v ); 1019 } 1020} 1021 1022 1023 1024/** 1025 * Setup RGB rendering for a window with a monochrome visual. 1026 */ 1027static void 1028setup_monochrome( XMesaVisual v, XMesaBuffer b ) 1029{ 1030 (void) b; 1031 v->dithered_pf = v->undithered_pf = PF_1Bit; 1032 /* if black=1 then we must flip pixel values */ 1033 v->bitFlip = (GET_BLACK_PIXEL(v) != 0); 1034} 1035 1036 1037 1038/** 1039 * When a context is bound for the first time, we can finally finish 1040 * initializing the context's visual and buffer information. 1041 * \param v the XMesaVisual to initialize 1042 * \param b the XMesaBuffer to initialize (may be NULL) 1043 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode 1044 * \param window the window/pixmap we're rendering into 1045 * \param cmap the colormap associated with the window/pixmap 1046 * \return GL_TRUE=success, GL_FALSE=failure 1047 */ 1048static GLboolean 1049initialize_visual_and_buffer(XMesaVisual v, XMesaBuffer b, 1050 GLboolean rgb_flag, XMesaDrawable window, 1051 XMesaColormap cmap) 1052{ 1053 int client = 0; 1054 1055#ifdef XFree86Server 1056 client = (window) ? CLIENT_ID(window->id) : 0; 1057#endif 1058 1059 ASSERT(!b || b->xm_visual == v); 1060 1061 /* Save true bits/pixel */ 1062 v->BitsPerPixel = bits_per_pixel(v); 1063 assert(v->BitsPerPixel > 0); 1064 1065 if (rgb_flag == GL_FALSE) { 1066 /* COLOR-INDEXED WINDOW: 1067 * Even if the visual is TrueColor or DirectColor we treat it as 1068 * being color indexed. This is weird but might be useful to someone. 1069 */ 1070 v->dithered_pf = v->undithered_pf = PF_Index; 1071 v->mesa_visual.indexBits = GET_VISUAL_DEPTH(v); 1072 } 1073 else { 1074 /* RGB WINDOW: 1075 * We support RGB rendering into almost any kind of visual. 1076 */ 1077 const int xclass = v->mesa_visual.visualType; 1078 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { 1079 setup_truecolor( v, b, cmap ); 1080 } 1081 else if (xclass == GLX_STATIC_GRAY && GET_VISUAL_DEPTH(v) == 1) { 1082 setup_monochrome( v, b ); 1083 } 1084 else if (xclass == GLX_GRAY_SCALE || xclass == GLX_STATIC_GRAY) { 1085 if (!setup_grayscale( client, v, b, cmap )) { 1086 return GL_FALSE; 1087 } 1088 } 1089 else if ((xclass == GLX_PSEUDO_COLOR || xclass == GLX_STATIC_COLOR) 1090 && GET_VISUAL_DEPTH(v)>=4 && GET_VISUAL_DEPTH(v)<=16) { 1091 if (!setup_dithered_color( client, v, b, cmap )) { 1092 return GL_FALSE; 1093 } 1094 } 1095 else { 1096 _mesa_warning(NULL, "XMesa: RGB mode rendering not supported in given visual.\n"); 1097 return GL_FALSE; 1098 } 1099 v->mesa_visual.indexBits = 0; 1100 1101 if (_mesa_getenv("MESA_NO_DITHER")) { 1102 v->dithered_pf = v->undithered_pf; 1103 } 1104 } 1105 1106 1107 /* 1108 * If MESA_INFO env var is set print out some debugging info 1109 * which can help Brian figure out what's going on when a user 1110 * reports bugs. 1111 */ 1112 if (_mesa_getenv("MESA_INFO")) { 1113 _mesa_printf("X/Mesa visual = %p\n", (void *) v); 1114 _mesa_printf("X/Mesa dithered pf = %u\n", v->dithered_pf); 1115 _mesa_printf("X/Mesa undithered pf = %u\n", v->undithered_pf); 1116 _mesa_printf("X/Mesa level = %d\n", v->mesa_visual.level); 1117 _mesa_printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v)); 1118 _mesa_printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel); 1119 } 1120 1121 if (b && window) { 1122 char *data; 1123 1124 /* Do window-specific initializations */ 1125 1126 /* these should have been set in create_xmesa_buffer */ 1127 ASSERT(b->frontxrb->drawable == window); 1128 ASSERT(b->frontxrb->pixmap == (XMesaPixmap) window); 1129 1130 /* Setup for single/double buffering */ 1131 if (v->mesa_visual.doubleBufferMode) { 1132 /* Double buffered */ 1133 b->shm = check_for_xshm( v->display ); 1134 } 1135 1136 /* X11 graphics contexts */ 1137#ifdef XFree86Server 1138 b->gc = CreateScratchGC(v->display, window->depth); 1139#else 1140 b->gc = XCreateGC( v->display, window, 0, NULL ); 1141#endif 1142 XMesaSetFunction( v->display, b->gc, GXcopy ); 1143 1144 /* cleargc - for glClear() */ 1145#ifdef XFree86Server 1146 b->cleargc = CreateScratchGC(v->display, window->depth); 1147#else 1148 b->cleargc = XCreateGC( v->display, window, 0, NULL ); 1149#endif 1150 XMesaSetFunction( v->display, b->cleargc, GXcopy ); 1151 1152 /* 1153 * Don't generate Graphics Expose/NoExpose events in swapbuffers(). 1154 * Patch contributed by Michael Pichler May 15, 1995. 1155 */ 1156#ifdef XFree86Server 1157 b->swapgc = CreateScratchGC(v->display, window->depth); 1158 { 1159 CARD32 v[1]; 1160 v[0] = FALSE; 1161 dixChangeGC(NullClient, b->swapgc, GCGraphicsExposures, v, NULL); 1162 } 1163#else 1164 { 1165 XGCValues gcvalues; 1166 gcvalues.graphics_exposures = False; 1167 b->swapgc = XCreateGC(v->display, window, 1168 GCGraphicsExposures, &gcvalues); 1169 } 1170#endif 1171 XMesaSetFunction( v->display, b->swapgc, GXcopy ); 1172 /* 1173 * Set fill style and tile pixmap once for all for HPCR stuff 1174 * (instead of doing it each time in clear_color_HPCR_pixmap()) 1175 * Initialize whole stuff 1176 * Patch contributed by Jacques Leroy March 8, 1998. 1177 */ 1178 if (v->hpcr_clear_flag && b->backxrb && b->backxrb->pixmap) { 1179 int i; 1180 for (i = 0; i < 16; i++) { 1181 XMesaPutPixel(v->hpcr_clear_ximage, i, 0, 0); 1182 XMesaPutPixel(v->hpcr_clear_ximage, i, 1, 0); 1183 } 1184 XMesaPutImage(b->display, (XMesaDrawable) v->hpcr_clear_pixmap, 1185 b->cleargc, v->hpcr_clear_ximage, 0, 0, 0, 0, 16, 2); 1186 XMesaSetFillStyle( v->display, b->cleargc, FillTiled); 1187 XMesaSetTile( v->display, b->cleargc, v->hpcr_clear_pixmap ); 1188 } 1189 1190 /* Initialize the row buffer XImage for use in write_color_span() */ 1191 data = (char*) MALLOC(MAX_WIDTH*4); 1192#ifdef XFree86Server 1193 b->rowimage = XMesaCreateImage(GET_VISUAL_DEPTH(v), MAX_WIDTH, 1, data); 1194#else 1195 b->rowimage = XCreateImage( v->display, 1196 v->visinfo->visual, 1197 v->visinfo->depth, 1198 ZPixmap, 0, /*format, offset*/ 1199 data, /*data*/ 1200 MAX_WIDTH, 1, /*width, height*/ 1201 32, /*bitmap_pad*/ 1202 0 /*bytes_per_line*/ ); 1203#endif 1204 if (!b->rowimage) 1205 return GL_FALSE; 1206 } 1207 1208 return GL_TRUE; 1209} 1210 1211 1212 1213/* 1214 * Convert an RGBA color to a pixel value. 1215 */ 1216unsigned long 1217xmesa_color_to_pixel(GLcontext *ctx, 1218 GLubyte r, GLubyte g, GLubyte b, GLubyte a, 1219 GLuint pixelFormat) 1220{ 1221 XMesaContext xmesa = XMESA_CONTEXT(ctx); 1222 switch (pixelFormat) { 1223 case PF_Index: 1224 return 0; 1225 case PF_Truecolor: 1226 { 1227 unsigned long p; 1228 PACK_TRUECOLOR( p, r, g, b ); 1229 return p; 1230 } 1231 case PF_8A8B8G8R: 1232 return PACK_8A8B8G8R( r, g, b, a ); 1233 case PF_8A8R8G8B: 1234 return PACK_8A8R8G8B( r, g, b, a ); 1235 case PF_8R8G8B: 1236 /* fall through */ 1237 case PF_8R8G8B24: 1238 return PACK_8R8G8B( r, g, b ); 1239 case PF_5R6G5B: 1240 return PACK_5R6G5B( r, g, b ); 1241 case PF_Dither: 1242 { 1243 DITHER_SETUP; 1244 return DITHER( 1, 0, r, g, b ); 1245 } 1246 case PF_1Bit: 1247 /* 382 = (3*255)/2 */ 1248 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 1249 case PF_HPCR: 1250 return DITHER_HPCR(1, 1, r, g, b); 1251 case PF_Lookup: 1252 { 1253 LOOKUP_SETUP; 1254 return LOOKUP( r, g, b ); 1255 } 1256 case PF_Grayscale: 1257 return GRAY_RGB( r, g, b ); 1258 case PF_Dither_True: 1259 /* fall through */ 1260 case PF_Dither_5R6G5B: 1261 { 1262 unsigned long p; 1263 PACK_TRUEDITHER(p, 1, 0, r, g, b); 1264 return p; 1265 } 1266 default: 1267 _mesa_problem(ctx, "Bad pixel format in xmesa_color_to_pixel"); 1268 } 1269 return 0; 1270} 1271 1272 1273#define NUM_VISUAL_TYPES 6 1274 1275/** 1276 * Convert an X visual type to a GLX visual type. 1277 * 1278 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.) 1279 * to be converted. 1280 * \return If \c visualType is a valid X visual type, a GLX visual type will 1281 * be returned. Otherwise \c GLX_NONE will be returned. 1282 * 1283 * \note 1284 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the 1285 * DRI CVS tree. 1286 */ 1287static GLint 1288xmesa_convert_from_x_visual_type( int visualType ) 1289{ 1290 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = { 1291 GLX_STATIC_GRAY, GLX_GRAY_SCALE, 1292 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR, 1293 GLX_TRUE_COLOR, GLX_DIRECT_COLOR 1294 }; 1295 1296 return ( (unsigned) visualType < NUM_VISUAL_TYPES ) 1297 ? glx_visual_types[ visualType ] : GLX_NONE; 1298} 1299 1300 1301/**********************************************************************/ 1302/***** Public Functions *****/ 1303/**********************************************************************/ 1304 1305 1306/* 1307 * Create a new X/Mesa visual. 1308 * Input: display - X11 display 1309 * visinfo - an XVisualInfo pointer 1310 * rgb_flag - GL_TRUE = RGB mode, 1311 * GL_FALSE = color index mode 1312 * alpha_flag - alpha buffer requested? 1313 * db_flag - GL_TRUE = double-buffered, 1314 * GL_FALSE = single buffered 1315 * stereo_flag - stereo visual? 1316 * ximage_flag - GL_TRUE = use an XImage for back buffer, 1317 * GL_FALSE = use an off-screen pixmap for back buffer 1318 * depth_size - requested bits/depth values, or zero 1319 * stencil_size - requested bits/stencil values, or zero 1320 * accum_red_size - requested bits/red accum values, or zero 1321 * accum_green_size - requested bits/green accum values, or zero 1322 * accum_blue_size - requested bits/blue accum values, or zero 1323 * accum_alpha_size - requested bits/alpha accum values, or zero 1324 * num_samples - number of samples/pixel if multisampling, or zero 1325 * level - visual level, usually 0 1326 * visualCaveat - ala the GLX extension, usually GLX_NONE 1327 * Return; a new XMesaVisual or 0 if error. 1328 */ 1329PUBLIC 1330XMesaVisual XMesaCreateVisual( XMesaDisplay *display, 1331 XMesaVisualInfo visinfo, 1332 GLboolean rgb_flag, 1333 GLboolean alpha_flag, 1334 GLboolean db_flag, 1335 GLboolean stereo_flag, 1336 GLboolean ximage_flag, 1337 GLint depth_size, 1338 GLint stencil_size, 1339 GLint accum_red_size, 1340 GLint accum_green_size, 1341 GLint accum_blue_size, 1342 GLint accum_alpha_size, 1343 GLint num_samples, 1344 GLint level, 1345 GLint visualCaveat ) 1346{ 1347 char *gamma; 1348 XMesaVisual v; 1349 GLint red_bits, green_bits, blue_bits, alpha_bits; 1350 1351#ifndef XFree86Server 1352 /* For debugging only */ 1353 if (_mesa_getenv("MESA_XSYNC")) { 1354 /* This makes debugging X easier. 1355 * In your debugger, set a breakpoint on _XError to stop when an 1356 * X protocol error is generated. 1357 */ 1358 XSynchronize( display, 1 ); 1359 } 1360#endif 1361 1362 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 1363 if (!v) { 1364 return NULL; 1365 } 1366 1367 v->display = display; 1368 1369 /* Save a copy of the XVisualInfo struct because the user may X_mesa_free() 1370 * the struct but we may need some of the information contained in it 1371 * at a later time. 1372 */ 1373#ifndef XFree86Server 1374 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 1375 if(!v->visinfo) { 1376 _mesa_free(v); 1377 return NULL; 1378 } 1379 MEMCPY(v->visinfo, visinfo, sizeof(*visinfo)); 1380#endif 1381 1382 /* check for MESA_GAMMA environment variable */ 1383 gamma = _mesa_getenv("MESA_GAMMA"); 1384 if (gamma) { 1385 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0; 1386 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma ); 1387 if (v->RedGamma<=0.0) v->RedGamma = 1.0; 1388 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma; 1389 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma; 1390 } 1391 else { 1392 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0; 1393 } 1394 1395 v->ximage_flag = ximage_flag; 1396 1397#ifdef XFree86Server 1398 /* We could calculate these values by ourselves. nplanes is either the sum 1399 * of the red, green, and blue bits or the number index bits. 1400 * ColormapEntries is either (1U << index_bits) or 1401 * (1U << max(redBits, greenBits, blueBits)). 1402 */ 1403 assert(visinfo->nplanes > 0); 1404 v->nplanes = visinfo->nplanes; 1405 v->ColormapEntries = visinfo->ColormapEntries; 1406 1407 v->mesa_visual.redMask = visinfo->redMask; 1408 v->mesa_visual.greenMask = visinfo->greenMask; 1409 v->mesa_visual.blueMask = visinfo->blueMask; 1410 v->mesa_visual.visualID = visinfo->vid; 1411 v->mesa_visual.screen = 0; /* FIXME: What should be done here? */ 1412#else 1413 v->mesa_visual.redMask = visinfo->red_mask; 1414 v->mesa_visual.greenMask = visinfo->green_mask; 1415 v->mesa_visual.blueMask = visinfo->blue_mask; 1416 v->mesa_visual.visualID = visinfo->visualid; 1417 v->mesa_visual.screen = visinfo->screen; 1418#endif 1419 1420#if defined(XFree86Server) || !(defined(__cplusplus) || defined(c_plusplus)) 1421 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->class); 1422#else 1423 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->c_class); 1424#endif 1425 1426 v->mesa_visual.visualRating = visualCaveat; 1427 1428 if (alpha_flag) 1429 v->mesa_visual.alphaBits = 8; 1430 1431 (void) initialize_visual_and_buffer( v, NULL, rgb_flag, 0, 0 ); 1432 1433 { 1434 const int xclass = v->mesa_visual.visualType; 1435 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { 1436 red_bits = _mesa_bitcount(GET_REDMASK(v)); 1437 green_bits = _mesa_bitcount(GET_GREENMASK(v)); 1438 blue_bits = _mesa_bitcount(GET_BLUEMASK(v)); 1439 } 1440 else { 1441 /* this is an approximation */ 1442 int depth; 1443 depth = GET_VISUAL_DEPTH(v); 1444 red_bits = depth / 3; 1445 depth -= red_bits; 1446 green_bits = depth / 2; 1447 depth -= green_bits; 1448 blue_bits = depth; 1449 alpha_bits = 0; 1450 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) ); 1451 } 1452 alpha_bits = v->mesa_visual.alphaBits; 1453 } 1454 1455 _mesa_initialize_visual( &v->mesa_visual, 1456 rgb_flag, db_flag, stereo_flag, 1457 red_bits, green_bits, 1458 blue_bits, alpha_bits, 1459 v->mesa_visual.indexBits, 1460 depth_size, 1461 stencil_size, 1462 accum_red_size, accum_green_size, 1463 accum_blue_size, accum_alpha_size, 1464 0 ); 1465 1466 /* XXX minor hack */ 1467 v->mesa_visual.level = level; 1468 return v; 1469} 1470 1471 1472PUBLIC 1473void XMesaDestroyVisual( XMesaVisual v ) 1474{ 1475#ifndef XFree86Server 1476 _mesa_free(v->visinfo); 1477#endif 1478 _mesa_free(v); 1479} 1480 1481 1482 1483/** 1484 * Create a new XMesaContext. 1485 * \param v the XMesaVisual 1486 * \param share_list another XMesaContext with which to share display 1487 * lists or NULL if no sharing is wanted. 1488 * \return an XMesaContext or NULL if error. 1489 */ 1490PUBLIC 1491XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) 1492{ 1493 static GLboolean firstTime = GL_TRUE; 1494 XMesaContext c; 1495 GLcontext *mesaCtx; 1496 struct dd_function_table functions; 1497 TNLcontext *tnl; 1498 1499 if (firstTime) { 1500 _glthread_INIT_MUTEX(_xmesa_lock); 1501 firstTime = GL_FALSE; 1502 } 1503 1504 /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */ 1505 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 1506 if (!c) 1507 return NULL; 1508 1509 mesaCtx = &(c->mesa); 1510 1511 /* initialize with default driver functions, then plug in XMesa funcs */ 1512 _mesa_init_driver_functions(&functions); 1513 xmesa_init_driver_functions(v, &functions); 1514 if (!_mesa_initialize_context(mesaCtx, &v->mesa_visual, 1515 share_list ? &(share_list->mesa) : (GLcontext *) NULL, 1516 &functions, (void *) c)) { 1517 _mesa_free(c); 1518 return NULL; 1519 } 1520 1521 _mesa_enable_sw_extensions(mesaCtx); 1522 _mesa_enable_1_3_extensions(mesaCtx); 1523 _mesa_enable_1_4_extensions(mesaCtx); 1524 _mesa_enable_1_5_extensions(mesaCtx); 1525 _mesa_enable_2_0_extensions(mesaCtx); 1526 _mesa_enable_2_1_extensions(mesaCtx); 1527#if ENABLE_EXT_texure_compression_s3tc 1528 if (c->Mesa_DXTn) { 1529 _mesa_enable_extension(mesaCtx, "GL_EXT_texture_compression_s3tc"); 1530 _mesa_enable_extension(mesaCtx, "GL_S3_s3tc"); 1531 } 1532 _mesa_enable_extension(mesaCtx, "GL_3DFX_texture_compression_FXT1"); 1533#endif 1534#if ENABLE_EXT_timer_query 1535 _mesa_enable_extension(mesaCtx, "GL_EXT_timer_query"); 1536#endif 1537 1538#ifdef XFree86Server 1539 /* If we're running in the X server, do bounds checking to prevent 1540 * segfaults and server crashes! 1541 */ 1542 mesaCtx->Const.CheckArrayBounds = GL_TRUE; 1543#endif 1544 1545 /* finish up xmesa context initializations */ 1546 c->swapbytes = CHECK_BYTE_ORDER(v) ? GL_FALSE : GL_TRUE; 1547 c->xm_visual = v; 1548 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ 1549 c->display = v->display; 1550 c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */ 1551 1552 /* Initialize the software rasterizer and helper modules. 1553 */ 1554 if (!_swrast_CreateContext( mesaCtx ) || 1555 !_vbo_CreateContext( mesaCtx ) || 1556 !_tnl_CreateContext( mesaCtx ) || 1557 !_swsetup_CreateContext( mesaCtx )) { 1558 _mesa_free_context_data(&c->mesa); 1559 _mesa_free(c); 1560 return NULL; 1561 } 1562 1563 /* tnl setup */ 1564 tnl = TNL_CONTEXT(mesaCtx); 1565 tnl->Driver.RunPipeline = _tnl_run_pipeline; 1566 /* swrast setup */ 1567 xmesa_register_swrast_functions( mesaCtx ); 1568 _swsetup_Wakeup(mesaCtx); 1569 1570 return c; 1571} 1572 1573 1574 1575PUBLIC 1576void XMesaDestroyContext( XMesaContext c ) 1577{ 1578 GLcontext *mesaCtx = &c->mesa; 1579 1580#ifdef FX 1581 FXdestroyContext( XMESA_BUFFER(mesaCtx->DrawBuffer) ); 1582#endif 1583 1584 _swsetup_DestroyContext( mesaCtx ); 1585 _swrast_DestroyContext( mesaCtx ); 1586 _tnl_DestroyContext( mesaCtx ); 1587 _vbo_DestroyContext( mesaCtx ); 1588 _mesa_free_context_data( mesaCtx ); 1589 _mesa_free( c ); 1590} 1591 1592 1593 1594/** 1595 * Private function for creating an XMesaBuffer which corresponds to an 1596 * X window or pixmap. 1597 * \param v the window's XMesaVisual 1598 * \param w the window we're wrapping 1599 * \return new XMesaBuffer or NULL if error 1600 */ 1601PUBLIC XMesaBuffer 1602XMesaCreateWindowBuffer(XMesaVisual v, XMesaWindow w) 1603{ 1604#ifndef XFree86Server 1605 XWindowAttributes attr; 1606#endif 1607 XMesaBuffer b; 1608 XMesaColormap cmap; 1609 int depth; 1610 1611 assert(v); 1612 assert(w); 1613 1614 /* Check that window depth matches visual depth */ 1615#ifdef XFree86Server 1616 depth = ((XMesaDrawable)w)->depth; 1617#else 1618 XGetWindowAttributes( v->display, w, &attr ); 1619 depth = attr.depth; 1620#endif 1621 if (GET_VISUAL_DEPTH(v) != depth) { 1622 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n", 1623 GET_VISUAL_DEPTH(v), depth); 1624 return NULL; 1625 } 1626 1627 /* Find colormap */ 1628#ifdef XFree86Server 1629 cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP); 1630#else 1631 if (attr.colormap) { 1632 cmap = attr.colormap; 1633 } 1634 else { 1635 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w); 1636 /* this is weird, a window w/out a colormap!? */ 1637 /* OK, let's just allocate a new one and hope for the best */ 1638 cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 1639 } 1640#endif 1641 1642 b = create_xmesa_buffer((XMesaDrawable) w, WINDOW, v, cmap); 1643 if (!b) 1644 return NULL; 1645 1646 if (!initialize_visual_and_buffer( v, b, v->mesa_visual.rgbMode, 1647 (XMesaDrawable) w, cmap )) { 1648 xmesa_free_buffer(b); 1649 return NULL; 1650 } 1651 1652 return b; 1653} 1654 1655 1656 1657/** 1658 * Create a new XMesaBuffer from an X pixmap. 1659 * 1660 * \param v the XMesaVisual 1661 * \param p the pixmap 1662 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or 1663 * \c GLX_DIRECT_COLOR visual for the pixmap 1664 * \returns new XMesaBuffer or NULL if error 1665 */ 1666PUBLIC XMesaBuffer 1667XMesaCreatePixmapBuffer(XMesaVisual v, XMesaPixmap p, XMesaColormap cmap) 1668{ 1669 XMesaBuffer b; 1670 1671 assert(v); 1672 1673 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap); 1674 if (!b) 1675 return NULL; 1676 1677 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 1678 (XMesaDrawable) p, cmap)) { 1679 xmesa_free_buffer(b); 1680 return NULL; 1681 } 1682 1683 return b; 1684} 1685 1686 1687/** 1688 * For GLX_EXT_texture_from_pixmap 1689 */ 1690XMesaBuffer 1691XMesaCreatePixmapTextureBuffer(XMesaVisual v, XMesaPixmap p, 1692 XMesaColormap cmap, 1693 int format, int target, int mipmap) 1694{ 1695 GET_CURRENT_CONTEXT(ctx); 1696 XMesaBuffer b; 1697 GLuint width, height; 1698 1699 assert(v); 1700 1701 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap); 1702 if (!b) 1703 return NULL; 1704 1705 /* get pixmap size, update framebuffer/renderbuffer dims */ 1706 xmesa_get_window_size(v->display, b, &width, &height); 1707 _mesa_resize_framebuffer(NULL, &(b->mesa_buffer), width, height); 1708 1709 if (target == 0) { 1710 /* examine dims */ 1711 if (ctx->Extensions.ARB_texture_non_power_of_two) { 1712 target = GLX_TEXTURE_2D_EXT; 1713 } 1714 else if ( _mesa_bitcount(width) == 1 1715 && _mesa_bitcount(height) == 1) { 1716 /* power of two size */ 1717 if (height == 1) { 1718 target = GLX_TEXTURE_1D_EXT; 1719 } 1720 else { 1721 target = GLX_TEXTURE_2D_EXT; 1722 } 1723 } 1724 else if (ctx->Extensions.NV_texture_rectangle) { 1725 target = GLX_TEXTURE_RECTANGLE_EXT; 1726 } 1727 else { 1728 /* non power of two textures not supported */ 1729 XMesaDestroyBuffer(b); 1730 return 0; 1731 } 1732 } 1733 1734 b->TextureTarget = target; 1735 b->TextureFormat = format; 1736 b->TextureMipmap = mipmap; 1737 1738 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 1739 (XMesaDrawable) p, cmap)) { 1740 xmesa_free_buffer(b); 1741 return NULL; 1742 } 1743 1744 return b; 1745} 1746 1747 1748 1749XMesaBuffer 1750XMesaCreatePBuffer(XMesaVisual v, XMesaColormap cmap, 1751 unsigned int width, unsigned int height) 1752{ 1753#ifndef XFree86Server 1754 XMesaWindow root; 1755 XMesaDrawable drawable; /* X Pixmap Drawable */ 1756 XMesaBuffer b; 1757 1758 /* allocate pixmap for front buffer */ 1759 root = RootWindow( v->display, v->visinfo->screen ); 1760 drawable = XCreatePixmap(v->display, root, width, height, 1761 v->visinfo->depth); 1762 if (!drawable) 1763 return NULL; 1764 1765 b = create_xmesa_buffer(drawable, PBUFFER, v, cmap); 1766 if (!b) 1767 return NULL; 1768 1769 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 1770 drawable, cmap)) { 1771 xmesa_free_buffer(b); 1772 return NULL; 1773 } 1774 1775 return b; 1776#else 1777 return 0; 1778#endif 1779} 1780 1781 1782 1783/* 1784 * Deallocate an XMesaBuffer structure and all related info. 1785 */ 1786PUBLIC void 1787XMesaDestroyBuffer(XMesaBuffer b) 1788{ 1789 xmesa_free_buffer(b); 1790} 1791 1792 1793/** 1794 * Query the current window size and update the corresponding GLframebuffer 1795 * and all attached renderbuffers. 1796 * Called when: 1797 * 1. the first time a buffer is bound to a context. 1798 * 2. from glViewport to poll for window size changes 1799 * 3. from the XMesaResizeBuffers() API function. 1800 * Note: it's possible (and legal) for xmctx to be NULL. That can happen 1801 * when resizing a buffer when no rendering context is bound. 1802 */ 1803void 1804xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer) 1805{ 1806 GLuint width, height; 1807 xmesa_get_window_size(drawBuffer->display, drawBuffer, &width, &height); 1808 if (drawBuffer->mesa_buffer.Width != width || 1809 drawBuffer->mesa_buffer.Height != height) { 1810 GLcontext *ctx = xmctx ? &xmctx->mesa : NULL; 1811 _mesa_resize_framebuffer(ctx, &(drawBuffer->mesa_buffer), width, height); 1812 } 1813 drawBuffer->mesa_buffer.Initialized = GL_TRUE; /* XXX TEMPORARY? */ 1814} 1815 1816 1817/* 1818 * Bind buffer b to context c and make c the current rendering context. 1819 */ 1820GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b ) 1821{ 1822 return XMesaMakeCurrent2( c, b, b ); 1823} 1824 1825 1826/* 1827 * Bind buffer b to context c and make c the current rendering context. 1828 */ 1829PUBLIC 1830GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, 1831 XMesaBuffer readBuffer ) 1832{ 1833 if (c) { 1834 if (!drawBuffer || !readBuffer) 1835 return GL_FALSE; /* must specify buffers! */ 1836 1837 if (&(c->mesa) == _mesa_get_current_context() 1838 && c->mesa.DrawBuffer == &drawBuffer->mesa_buffer 1839 && c->mesa.ReadBuffer == &readBuffer->mesa_buffer 1840 && XMESA_BUFFER(c->mesa.DrawBuffer)->wasCurrent) { 1841 /* same context and buffer, do nothing */ 1842 return GL_TRUE; 1843 } 1844 1845 c->xm_buffer = drawBuffer; 1846 1847#ifdef FX 1848 if (FXmakeCurrent( drawBuffer )) 1849 return GL_TRUE; 1850#endif 1851 1852 /* Call this periodically to detect when the user has begun using 1853 * GL rendering from multiple threads. 1854 */ 1855 _glapi_check_multithread(); 1856 1857 xmesa_check_and_update_buffer_size(c, drawBuffer); 1858 if (readBuffer != drawBuffer) 1859 xmesa_check_and_update_buffer_size(c, readBuffer); 1860 1861 _mesa_make_current(&(c->mesa), 1862 &drawBuffer->mesa_buffer, 1863 &readBuffer->mesa_buffer); 1864 1865 if (c->xm_visual->mesa_visual.rgbMode) { 1866 /* 1867 * Must recompute and set these pixel values because colormap 1868 * can be different for different windows. 1869 */ 1870 c->clearpixel = xmesa_color_to_pixel( &c->mesa, 1871 c->clearcolor[0], 1872 c->clearcolor[1], 1873 c->clearcolor[2], 1874 c->clearcolor[3], 1875 c->xm_visual->undithered_pf); 1876 XMesaSetForeground(c->display, drawBuffer->cleargc, c->clearpixel); 1877 } 1878 1879 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 1880 drawBuffer->wasCurrent = GL_TRUE; 1881 } 1882 else { 1883 /* Detach */ 1884 _mesa_make_current( NULL, NULL, NULL ); 1885 } 1886 return GL_TRUE; 1887} 1888 1889 1890/* 1891 * Unbind the context c from its buffer. 1892 */ 1893GLboolean XMesaUnbindContext( XMesaContext c ) 1894{ 1895 /* A no-op for XFree86 integration purposes */ 1896 return GL_TRUE; 1897} 1898 1899 1900XMesaContext XMesaGetCurrentContext( void ) 1901{ 1902 GET_CURRENT_CONTEXT(ctx); 1903 if (ctx) { 1904 XMesaContext xmesa = XMESA_CONTEXT(ctx); 1905 return xmesa; 1906 } 1907 else { 1908 return 0; 1909 } 1910} 1911 1912 1913XMesaBuffer XMesaGetCurrentBuffer( void ) 1914{ 1915 GET_CURRENT_CONTEXT(ctx); 1916 if (ctx) { 1917 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer); 1918 return xmbuf; 1919 } 1920 else { 1921 return 0; 1922 } 1923} 1924 1925 1926/* New in Mesa 3.1 */ 1927XMesaBuffer XMesaGetCurrentReadBuffer( void ) 1928{ 1929 GET_CURRENT_CONTEXT(ctx); 1930 if (ctx) { 1931 return XMESA_BUFFER(ctx->ReadBuffer); 1932 } 1933 else { 1934 return 0; 1935 } 1936} 1937 1938 1939#ifdef XFree86Server 1940PUBLIC 1941GLboolean XMesaForceCurrent(XMesaContext c) 1942{ 1943 if (c) { 1944 _glapi_set_dispatch(c->mesa.CurrentDispatch); 1945 1946 if (&(c->mesa) != _mesa_get_current_context()) { 1947 _mesa_make_current(&c->mesa, c->mesa.DrawBuffer, c->mesa.ReadBuffer); 1948 } 1949 } 1950 else { 1951 _mesa_make_current(NULL, NULL, NULL); 1952 } 1953 return GL_TRUE; 1954} 1955 1956 1957PUBLIC 1958GLboolean XMesaLoseCurrent(XMesaContext c) 1959{ 1960 (void) c; 1961 _mesa_make_current(NULL, NULL, NULL); 1962 return GL_TRUE; 1963} 1964 1965 1966PUBLIC 1967GLboolean XMesaCopyContext( XMesaContext xm_src, XMesaContext xm_dst, GLuint mask ) 1968{ 1969 _mesa_copy_context(&xm_src->mesa, &xm_dst->mesa, mask); 1970 return GL_TRUE; 1971} 1972#endif /* XFree86Server */ 1973 1974 1975#ifndef FX 1976GLboolean XMesaSetFXmode( GLint mode ) 1977{ 1978 (void) mode; 1979 return GL_FALSE; 1980} 1981#endif 1982 1983 1984 1985/* 1986 * Copy the back buffer to the front buffer. If there's no back buffer 1987 * this is a no-op. 1988 */ 1989PUBLIC 1990void XMesaSwapBuffers( XMesaBuffer b ) 1991{ 1992 GET_CURRENT_CONTEXT(ctx); 1993 1994 if (!b->backxrb) { 1995 /* single buffered */ 1996 return; 1997 } 1998 1999 /* If we're swapping the buffer associated with the current context 2000 * we have to flush any pending rendering commands first. 2001 */ 2002 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2003 _mesa_notifySwapBuffers(ctx); 2004 2005 if (b->db_mode) { 2006#ifdef FX 2007 if (FXswapBuffers(b)) 2008 return; 2009#endif 2010 if (b->backxrb->ximage) { 2011 /* Copy Ximage (back buf) from client memory to server window */ 2012#if defined(USE_XSHM) && !defined(XFree86Server) 2013 if (b->shm) { 2014 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2015 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable, 2016 b->swapgc, 2017 b->backxrb->ximage, 0, 0, 2018 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height, 2019 False ); 2020 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2021 } 2022 else 2023#endif 2024 { 2025 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2026 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable, 2027 b->swapgc, 2028 b->backxrb->ximage, 0, 0, 2029 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height ); 2030 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2031 } 2032 } 2033 else if (b->backxrb->pixmap) { 2034 /* Copy pixmap (back buf) to window (front buf) on server */ 2035 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2036 XMesaCopyArea( b->xm_visual->display, 2037 b->backxrb->pixmap, /* source drawable */ 2038 b->frontxrb->drawable, /* dest. drawable */ 2039 b->swapgc, 2040 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height, 2041 0, 0 /* dest region */ 2042 ); 2043 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2044 } 2045 2046 if (b->swAlpha) 2047 _mesa_copy_soft_alpha_renderbuffers(ctx, &b->mesa_buffer); 2048 } 2049#if !defined(XFree86Server) 2050 XSync( b->xm_visual->display, False ); 2051#endif 2052} 2053 2054 2055 2056/* 2057 * Copy sub-region of back buffer to front buffer 2058 */ 2059void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 2060{ 2061 GET_CURRENT_CONTEXT(ctx); 2062 2063 /* If we're swapping the buffer associated with the current context 2064 * we have to flush any pending rendering commands first. 2065 */ 2066 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2067 _mesa_notifySwapBuffers(ctx); 2068 2069 if (!b->backxrb) { 2070 /* single buffered */ 2071 return; 2072 } 2073 2074 if (b->db_mode) { 2075 int yTop = b->mesa_buffer.Height - y - height; 2076#ifdef FX 2077 if (FXswapBuffers(b)) 2078 return; 2079#endif 2080 if (b->backxrb->ximage) { 2081 /* Copy Ximage from host's memory to server's window */ 2082#if defined(USE_XSHM) && !defined(XFree86Server) 2083 if (b->shm) { 2084 /* XXX assuming width and height aren't too large! */ 2085 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable, 2086 b->swapgc, 2087 b->backxrb->ximage, x, yTop, 2088 x, yTop, width, height, False ); 2089 /* wait for finished event??? */ 2090 } 2091 else 2092#endif 2093 { 2094 /* XXX assuming width and height aren't too large! */ 2095 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable, 2096 b->swapgc, 2097 b->backxrb->ximage, x, yTop, 2098 x, yTop, width, height ); 2099 } 2100 } 2101 else { 2102 /* Copy pixmap to window on server */ 2103 XMesaCopyArea( b->xm_visual->display, 2104 b->backxrb->pixmap, /* source drawable */ 2105 b->frontxrb->drawable, /* dest. drawable */ 2106 b->swapgc, 2107 x, yTop, width, height, /* source region */ 2108 x, yTop /* dest region */ 2109 ); 2110 } 2111 } 2112} 2113 2114 2115/* 2116 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function 2117 * is a way to get "under the hood" of X/Mesa so one can manipulate the 2118 * back buffer directly. 2119 * Output: pixmap - pointer to back buffer's Pixmap, or 0 2120 * ximage - pointer to back buffer's XImage, or NULL 2121 * Return: GL_TRUE = context is double buffered 2122 * GL_FALSE = context is single buffered 2123 */ 2124#ifndef XFree86Server 2125GLboolean XMesaGetBackBuffer( XMesaBuffer b, 2126 XMesaPixmap *pixmap, 2127 XMesaImage **ximage ) 2128{ 2129 if (b->db_mode) { 2130 if (pixmap) 2131 *pixmap = b->backxrb->pixmap; 2132 if (ximage) 2133 *ximage = b->backxrb->ximage; 2134 return GL_TRUE; 2135 } 2136 else { 2137 *pixmap = 0; 2138 *ximage = NULL; 2139 return GL_FALSE; 2140 } 2141} 2142#endif /* XFree86Server */ 2143 2144 2145/* 2146 * Return the depth buffer associated with an XMesaBuffer. 2147 * Input: b - the XMesa buffer handle 2148 * Output: width, height - size of buffer in pixels 2149 * bytesPerValue - bytes per depth value (2 or 4) 2150 * buffer - pointer to depth buffer values 2151 * Return: GL_TRUE or GL_FALSE to indicate success or failure. 2152 */ 2153GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height, 2154 GLint *bytesPerValue, void **buffer ) 2155{ 2156 struct gl_renderbuffer *rb 2157 = b->mesa_buffer.Attachment[BUFFER_DEPTH].Renderbuffer; 2158 if (!rb || !rb->Data) { 2159 *width = 0; 2160 *height = 0; 2161 *bytesPerValue = 0; 2162 *buffer = 0; 2163 return GL_FALSE; 2164 } 2165 else { 2166 *width = b->mesa_buffer.Width; 2167 *height = b->mesa_buffer.Height; 2168 *bytesPerValue = b->mesa_buffer.Visual.depthBits <= 16 2169 ? sizeof(GLushort) : sizeof(GLuint); 2170 *buffer = rb->Data; 2171 return GL_TRUE; 2172 } 2173} 2174 2175 2176void XMesaFlush( XMesaContext c ) 2177{ 2178 if (c && c->xm_visual) { 2179#ifdef XFree86Server 2180 /* NOT_NEEDED */ 2181#else 2182 XSync( c->xm_visual->display, False ); 2183#endif 2184 } 2185} 2186 2187 2188 2189const char *XMesaGetString( XMesaContext c, int name ) 2190{ 2191 (void) c; 2192 if (name==XMESA_VERSION) { 2193 return "5.0"; 2194 } 2195 else if (name==XMESA_EXTENSIONS) { 2196 return ""; 2197 } 2198 else { 2199 return NULL; 2200 } 2201} 2202 2203 2204 2205XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d ) 2206{ 2207 XMesaBuffer b; 2208 for (b=XMesaBufferList; b; b=b->Next) { 2209 if (b->frontxrb->drawable == d && b->display == dpy) { 2210 return b; 2211 } 2212 } 2213 return NULL; 2214} 2215 2216 2217/** 2218 * Free/destroy all XMesaBuffers associated with given display. 2219 */ 2220void xmesa_destroy_buffers_on_display(XMesaDisplay *dpy) 2221{ 2222 XMesaBuffer b, next; 2223 for (b = XMesaBufferList; b; b = next) { 2224 next = b->Next; 2225 if (b->display == dpy) { 2226 xmesa_free_buffer(b); 2227 } 2228 } 2229} 2230 2231 2232/* 2233 * Look for XMesaBuffers whose X window has been destroyed. 2234 * Deallocate any such XMesaBuffers. 2235 */ 2236void XMesaGarbageCollect( void ) 2237{ 2238 XMesaBuffer b, next; 2239 for (b=XMesaBufferList; b; b=next) { 2240 next = b->Next; 2241 if (b->display && b->frontxrb->drawable && b->type == WINDOW) { 2242#ifdef XFree86Server 2243 /* NOT_NEEDED */ 2244#else 2245 XSync(b->display, False); 2246 if (!window_exists( b->display, b->frontxrb->drawable )) { 2247 /* found a dead window, free the ancillary info */ 2248 XMesaDestroyBuffer( b ); 2249 } 2250#endif 2251 } 2252 } 2253} 2254 2255 2256unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y, 2257 GLfloat red, GLfloat green, 2258 GLfloat blue, GLfloat alpha ) 2259{ 2260 GLcontext *ctx = &xmesa->mesa; 2261 GLint r = (GLint) (red * 255.0F); 2262 GLint g = (GLint) (green * 255.0F); 2263 GLint b = (GLint) (blue * 255.0F); 2264 GLint a = (GLint) (alpha * 255.0F); 2265 2266 switch (xmesa->pixelformat) { 2267 case PF_Index: 2268 return 0; 2269 case PF_Truecolor: 2270 { 2271 unsigned long p; 2272 PACK_TRUECOLOR( p, r, g, b ); 2273 return p; 2274 } 2275 case PF_8A8B8G8R: 2276 return PACK_8A8B8G8R( r, g, b, a ); 2277 case PF_8A8R8G8B: 2278 return PACK_8A8R8G8B( r, g, b, a ); 2279 case PF_8R8G8B: 2280 return PACK_8R8G8B( r, g, b ); 2281 case PF_5R6G5B: 2282 return PACK_5R6G5B( r, g, b ); 2283 case PF_Dither: 2284 { 2285 DITHER_SETUP; 2286 return DITHER( x, y, r, g, b ); 2287 } 2288 case PF_1Bit: 2289 /* 382 = (3*255)/2 */ 2290 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 2291 case PF_HPCR: 2292 return DITHER_HPCR(x, y, r, g, b); 2293 case PF_Lookup: 2294 { 2295 LOOKUP_SETUP; 2296 return LOOKUP( r, g, b ); 2297 } 2298 case PF_Grayscale: 2299 return GRAY_RGB( r, g, b ); 2300 case PF_Dither_5R6G5B: 2301 /* fall through */ 2302 case PF_Dither_True: 2303 { 2304 unsigned long p; 2305 PACK_TRUEDITHER(p, x, y, r, g, b); 2306 return p; 2307 } 2308 default: 2309 _mesa_problem(NULL, "Bad pixel format in XMesaDitherColor"); 2310 } 2311 return 0; 2312} 2313 2314 2315/* 2316 * This is typically called when the window size changes and we need 2317 * to reallocate the buffer's back/depth/stencil/accum buffers. 2318 */ 2319PUBLIC void 2320XMesaResizeBuffers( XMesaBuffer b ) 2321{ 2322 GET_CURRENT_CONTEXT(ctx); 2323 XMesaContext xmctx = XMESA_CONTEXT(ctx); 2324 if (!xmctx) 2325 return; 2326 xmesa_check_and_update_buffer_size(xmctx, b); 2327} 2328 2329 2330static GLint 2331xbuffer_to_renderbuffer(int buffer) 2332{ 2333 assert(MAX_AUX_BUFFERS <= 4); 2334 2335 switch (buffer) { 2336 case GLX_FRONT_LEFT_EXT: 2337 return BUFFER_FRONT_LEFT; 2338 case GLX_FRONT_RIGHT_EXT: 2339 return BUFFER_FRONT_RIGHT; 2340 case GLX_BACK_LEFT_EXT: 2341 return BUFFER_BACK_LEFT; 2342 case GLX_BACK_RIGHT_EXT: 2343 return BUFFER_BACK_RIGHT; 2344 case GLX_AUX0_EXT: 2345 return BUFFER_AUX0; 2346 case GLX_AUX1_EXT: 2347 return BUFFER_AUX1; 2348 case GLX_AUX2_EXT: 2349 return BUFFER_AUX2; 2350 case GLX_AUX3_EXT: 2351 return BUFFER_AUX3; 2352 case GLX_AUX4_EXT: 2353 case GLX_AUX5_EXT: 2354 case GLX_AUX6_EXT: 2355 case GLX_AUX7_EXT: 2356 case GLX_AUX8_EXT: 2357 case GLX_AUX9_EXT: 2358 default: 2359 /* BadValue error */ 2360 return -1; 2361 } 2362} 2363 2364 2365PUBLIC void 2366XMesaBindTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer, 2367 const int *attrib_list) 2368{ 2369#if 0 2370 GET_CURRENT_CONTEXT(ctx); 2371 const GLuint unit = ctx->Texture.CurrentUnit; 2372 struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit]; 2373 struct gl_texture_object *texObj; 2374#endif 2375 struct gl_renderbuffer *rb; 2376 struct xmesa_renderbuffer *xrb; 2377 GLint b; 2378 XMesaImage *img = NULL; 2379 GLboolean freeImg = GL_FALSE; 2380 2381 b = xbuffer_to_renderbuffer(buffer); 2382 if (b < 0) 2383 return; 2384 2385 if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_NONE_EXT) 2386 return; /* BadMatch error */ 2387 2388 rb = drawable->mesa_buffer.Attachment[b].Renderbuffer; 2389 if (!rb) { 2390 /* invalid buffer */ 2391 return; 2392 } 2393 xrb = xmesa_renderbuffer(rb); 2394 2395#if 0 2396 switch (drawable->TextureTarget) { 2397 case GLX_TEXTURE_1D_EXT: 2398 texObj = texUnit->Current1D; 2399 break; 2400 case GLX_TEXTURE_2D_EXT: 2401 texObj = texUnit->Current2D; 2402 break; 2403 case GLX_TEXTURE_RECTANGLE_EXT: 2404 texObj = texUnit->CurrentRect; 2405 break; 2406 default: 2407 return; /* BadMatch error */ 2408 } 2409#endif 2410 2411 /* 2412 * The following is a quick and simple way to implement 2413 * BindTexImage. The better way is to write some new FetchTexel() 2414 * functions which would extract texels from XImages. We'd still 2415 * need to use GetImage when texturing from a Pixmap (front buffer) 2416 * but texturing from a back buffer (XImage) would avoid an image 2417 * copy. 2418 */ 2419 2420 /* get XImage */ 2421 if (xrb->pixmap) { 2422 img = XMesaGetImage(dpy, xrb->pixmap, 0, 0, rb->Width, rb->Height, ~0L, 2423 ZPixmap); 2424 freeImg = GL_TRUE; 2425 } 2426 else if (xrb->ximage) { 2427 img = xrb->ximage; 2428 } 2429 2430 /* store the XImage as a new texture image */ 2431 if (img) { 2432 GLenum format, type, intFormat; 2433 if (img->bits_per_pixel == 32) { 2434 format = GL_BGRA; 2435 type = GL_UNSIGNED_BYTE; 2436 intFormat = GL_RGBA; 2437 } 2438 else if (img->bits_per_pixel == 24) { 2439 format = GL_BGR; 2440 type = GL_UNSIGNED_BYTE; 2441 intFormat = GL_RGB; 2442 } 2443 else if (img->bits_per_pixel == 16) { 2444 format = GL_BGR; 2445 type = GL_UNSIGNED_SHORT_5_6_5; 2446 intFormat = GL_RGB; 2447 } 2448 else { 2449 _mesa_problem(NULL, "Unexpected XImage format in XMesaBindTexImage"); 2450 return; 2451 } 2452 if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGBA_EXT) { 2453 intFormat = GL_RGBA; 2454 } 2455 else if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGB_EXT) { 2456 intFormat = GL_RGB; 2457 } 2458 2459 _mesa_TexImage2D(GL_TEXTURE_2D, 0, intFormat, rb->Width, rb->Height, 0, 2460 format, type, img->data); 2461 2462 if (freeImg) { 2463 XMesaDestroyImage(img); 2464 } 2465 } 2466} 2467 2468 2469 2470PUBLIC void 2471XMesaReleaseTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer) 2472{ 2473 const GLint b = xbuffer_to_renderbuffer(buffer); 2474 if (b < 0) 2475 return; 2476 2477 /* no-op for now */ 2478} 2479 2480