src/parsec/disk-image/parsec/parsec-benchmark/pkgs/libs/mesa/src/src/glx/x11/dri_common.c - public/gem5-resources - Git at Google

 /*
  * Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas.
  * Copyright © 2008 Red Hat, Inc.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Soft-
  * ware"), to deal in the Software without restriction, including without
  * limitation the rights to use, copy, modify, merge, publish, distribute,
  * and/or sell copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, provided that the above copyright
  * notice(s) and this permission notice appear in all copies of the Soft-
  * ware and that both the above copyright notice(s) and this permission
  * notice appear in supporting documentation.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
  * ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY
  * RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN
  * THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSE-
  * QUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFOR-
  * MANCE OF THIS SOFTWARE.
  *
  * Except as contained in this notice, the name of a copyright holder shall
  * not be used in advertising or otherwise to promote the sale, use or
  * other dealings in this Software without prior written authorization of
  * the copyright holder.
  *
  * Authors:
  *   Kevin E. Martin <kevin@precisioninsight.com>
  *   Brian Paul <brian@precisioninsight.com>
  *   Kristian Høgsberg (krh@redhat.com)
  */

 #ifdef GLX_DIRECT_RENDERING

 #include <unistd.h>
 #include <dlfcn.h>
 #include "glheader.h"
 #include "glxclient.h"
 #include "glcontextmodes.h"
 #include "dri_common.h"

 #ifndef RTLD_NOW
 #define RTLD_NOW 0
 #endif
 #ifndef RTLD_GLOBAL
 #define RTLD_GLOBAL 0
 #endif

 _X_HIDDEN void InfoMessageF(const char *f, ...)
 {
     va_list args;
     const char *env;

     if ((env = getenv("LIBGL_DEBUG")) && strstr(env, "verbose")) {
 	fprintf(stderr, "libGL: ");
 	va_start(args, f);
 	vfprintf(stderr, f, args);
 	va_end(args);
     }
 }

 /**
  * Print error to stderr, unless LIBGL_DEBUG=="quiet".
  */
 _X_HIDDEN void ErrorMessageF(const char *f, ...)
 {
     va_list args;
     const char *env;

     if ((env = getenv("LIBGL_DEBUG")) && !strstr(env, "quiet")) {
 	fprintf(stderr, "libGL error: ");
 	va_start(args, f);
 	vfprintf(stderr, f, args);
 	va_end(args);
     }
 }

 #ifndef DEFAULT_DRIVER_DIR
 /* this is normally defined in Mesa/configs/default with DRI_DRIVER_SEARCH_PATH */
 #define DEFAULT_DRIVER_DIR "/usr/local/lib/dri"
 #endif

 /**
  * Try to \c dlopen the named driver.
  *
  * This function adds the "_dri.so" suffix to the driver name and searches the
  * directories specified by the \c LIBGL_DRIVERS_PATH environment variable in
  * order to find the driver.
  *
  * \param driverName - a name like "tdfx", "i810", "mga", etc.
  *
  * \returns
  * A handle from \c dlopen, or \c NULL if driver file not found.
  */
 _X_HIDDEN void *driOpenDriver(const char *driverName)
 {
    void *glhandle, *handle;
    const char *libPaths, *p, *next;
    char realDriverName[200];
    int len;

    /* Attempt to make sure libGL symbols will be visible to the driver */
    glhandle = dlopen("libGL.so.1", RTLD_NOW | RTLD_GLOBAL);

    libPaths = NULL;
    if (geteuid() == getuid()) {
       /* don't allow setuid apps to use LIBGL_DRIVERS_PATH */
       libPaths = getenv("LIBGL_DRIVERS_PATH");
       if (!libPaths)
          libPaths = getenv("LIBGL_DRIVERS_DIR"); /* deprecated */
    }
    if (libPaths == NULL)
        libPaths = DEFAULT_DRIVER_DIR;

    handle = NULL;
    for (p = libPaths; *p; p = next) {
        next = strchr(p, ':');
        if (next == NULL) {
 	   len = strlen(p);
 	   next = p + len;
        } else {
 	   len = next - p;
 	   next++;
        }

 #ifdef GLX_USE_TLS
       snprintf(realDriverName, sizeof realDriverName,
 	       "%.*s/tls/%s_dri.so", len, p, driverName);
       InfoMessageF("OpenDriver: trying %s\n", realDriverName);
       handle = dlopen(realDriverName, RTLD_NOW | RTLD_GLOBAL);
 #endif

       if ( handle == NULL ) {
 	 snprintf(realDriverName, sizeof realDriverName,
 		  "%.*s/%s_dri.so", len, p, driverName);
 	 InfoMessageF("OpenDriver: trying %s\n", realDriverName);
 	 handle = dlopen(realDriverName, RTLD_NOW | RTLD_GLOBAL);
       }

       if ( handle != NULL )
 	  break;
       else
 	 ErrorMessageF("dlopen %s failed (%s)\n", realDriverName, dlerror());
    }

    if (!handle)
       ErrorMessageF("unable to load driver: %s_dri.so\n", driverName);

    if (glhandle)
       dlclose(glhandle);

    return handle;
 }

 _X_HIDDEN const __DRIsystemTimeExtension systemTimeExtension = {
     { __DRI_SYSTEM_TIME, __DRI_SYSTEM_TIME_VERSION },
     __glXGetUST,
     __driGetMscRateOML
 };

 #define __ATTRIB(attrib, field) \
     { attrib, offsetof(__GLcontextModes, field) }

 static const struct { unsigned int attrib, offset; } attribMap[] = {
     __ATTRIB(__DRI_ATTRIB_BUFFER_SIZE,			rgbBits),
     __ATTRIB(__DRI_ATTRIB_LEVEL,			level),
     __ATTRIB(__DRI_ATTRIB_RED_SIZE,			redBits),
     __ATTRIB(__DRI_ATTRIB_GREEN_SIZE,			greenBits),
     __ATTRIB(__DRI_ATTRIB_BLUE_SIZE,			blueBits),
     __ATTRIB(__DRI_ATTRIB_ALPHA_SIZE,			alphaBits),
     __ATTRIB(__DRI_ATTRIB_DEPTH_SIZE,			depthBits),
     __ATTRIB(__DRI_ATTRIB_STENCIL_SIZE,			stencilBits),
     __ATTRIB(__DRI_ATTRIB_ACCUM_RED_SIZE,		accumRedBits),
     __ATTRIB(__DRI_ATTRIB_ACCUM_GREEN_SIZE,		accumGreenBits),
     __ATTRIB(__DRI_ATTRIB_ACCUM_BLUE_SIZE,		accumBlueBits),
     __ATTRIB(__DRI_ATTRIB_ACCUM_ALPHA_SIZE,		accumAlphaBits),
     __ATTRIB(__DRI_ATTRIB_SAMPLE_BUFFERS,		sampleBuffers),
     __ATTRIB(__DRI_ATTRIB_SAMPLES,			samples),
     __ATTRIB(__DRI_ATTRIB_DOUBLE_BUFFER,		doubleBufferMode),
     __ATTRIB(__DRI_ATTRIB_STEREO,			stereoMode),
     __ATTRIB(__DRI_ATTRIB_AUX_BUFFERS,			numAuxBuffers),
 #if 0
     __ATTRIB(__DRI_ATTRIB_TRANSPARENT_TYPE,		transparentPixel),
     __ATTRIB(__DRI_ATTRIB_TRANSPARENT_INDEX_VALUE,	transparentIndex),
     __ATTRIB(__DRI_ATTRIB_TRANSPARENT_RED_VALUE,	transparentRed),
     __ATTRIB(__DRI_ATTRIB_TRANSPARENT_GREEN_VALUE,	transparentGreen),
     __ATTRIB(__DRI_ATTRIB_TRANSPARENT_BLUE_VALUE,	transparentBlue),
     __ATTRIB(__DRI_ATTRIB_TRANSPARENT_ALPHA_VALUE,	transparentAlpha),
     __ATTRIB(__DRI_ATTRIB_RED_MASK,			redMask),
     __ATTRIB(__DRI_ATTRIB_GREEN_MASK,			greenMask),
     __ATTRIB(__DRI_ATTRIB_BLUE_MASK,			blueMask),
     __ATTRIB(__DRI_ATTRIB_ALPHA_MASK,			alphaMask),
 #endif
     __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_WIDTH,		maxPbufferWidth),
     __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_HEIGHT,		maxPbufferHeight),
     __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_PIXELS,		maxPbufferPixels),
     __ATTRIB(__DRI_ATTRIB_OPTIMAL_PBUFFER_WIDTH,	optimalPbufferWidth),
     __ATTRIB(__DRI_ATTRIB_OPTIMAL_PBUFFER_HEIGHT,	optimalPbufferHeight),
 #if 0
     __ATTRIB(__DRI_ATTRIB_SWAP_METHOD,			swapMethod),
 #endif
     __ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_RGB,		bindToTextureRgb),
     __ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_RGBA,		bindToTextureRgba),
     __ATTRIB(__DRI_ATTRIB_BIND_TO_MIPMAP_TEXTURE,	bindToMipmapTexture),
     __ATTRIB(__DRI_ATTRIB_YINVERTED,			yInverted),
 };

 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))

 static int
 scalarEqual(__GLcontextModes *mode, unsigned int attrib, unsigned int value)
 {
     unsigned int glxValue;
     int i;

     for (i = 0; i < ARRAY_SIZE(attribMap); i++)
 	if (attribMap[i].attrib == attrib) {
 	    glxValue = *(unsigned int *) ((char *) mode + attribMap[i].offset);
 	    return glxValue == GLX_DONT_CARE || glxValue == value;
 	}

     return GL_TRUE; /* Is a non-existing attribute equal to value? */
 }

 static int
 driConfigEqual(const __DRIcoreExtension *core,
 	       __GLcontextModes *modes, const __DRIconfig *driConfig)
 {
     unsigned int attrib, value, glxValue;
     int i;

     i = 0;
     while (core->indexConfigAttrib(driConfig, i++, &attrib, &value)) {
 	switch (attrib) {
 	case __DRI_ATTRIB_RENDER_TYPE:
 	    glxValue = 0;
 	    if (value & __DRI_ATTRIB_RGBA_BIT) {
 		glxValue |= GLX_RGBA_BIT;
 	    } else if (value & __DRI_ATTRIB_COLOR_INDEX_BIT) {
 		glxValue |= GLX_COLOR_INDEX_BIT;
 	    }
 	    if (glxValue != modes->renderType)
 		return GL_FALSE;
 	    break;

 	case __DRI_ATTRIB_CONFIG_CAVEAT:
 	    if (value & __DRI_ATTRIB_NON_CONFORMANT_CONFIG)
 		glxValue = GLX_NON_CONFORMANT_CONFIG;
 	    else if (value & __DRI_ATTRIB_SLOW_BIT)
 		glxValue = GLX_SLOW_CONFIG;
 	    else
 		glxValue = GLX_NONE;
 	    if (glxValue != modes->visualRating)
 		return GL_FALSE;
 	    break;

 	case __DRI_ATTRIB_BIND_TO_TEXTURE_TARGETS:
 	    glxValue = 0;
 	    if (value & __DRI_ATTRIB_TEXTURE_1D_BIT)
 		glxValue |= GLX_TEXTURE_1D_BIT_EXT;
 	    if (value & __DRI_ATTRIB_TEXTURE_2D_BIT)
 		glxValue |= GLX_TEXTURE_2D_BIT_EXT;
 	    if (value & __DRI_ATTRIB_TEXTURE_RECTANGLE_BIT)
 		glxValue |= GLX_TEXTURE_RECTANGLE_BIT_EXT;
 	    if (modes->bindToTextureTargets != GLX_DONT_CARE &&
 		glxValue != modes->bindToTextureTargets)
 		return GL_FALSE;
 	    break;

 	default:
 	    if (!scalarEqual(modes, attrib, value))
 		return GL_FALSE;
 	}
     }

     return GL_TRUE;
 }

 static __GLcontextModes *
 createDriMode(const __DRIcoreExtension *core,
 	      __GLcontextModes *modes, const __DRIconfig **driConfigs)
 {
     __GLXDRIconfigPrivate *config;
     int i;

     for (i = 0; driConfigs[i]; i++) {
 	if (driConfigEqual(core, modes, driConfigs[i]))
 	    break;
     }

     if (driConfigs[i] == NULL)
 	return NULL;

     config = Xmalloc(sizeof *config);
     if (config == NULL)
 	return NULL;

     config->modes = *modes;
     config->driConfig = driConfigs[i];

     return &config->modes;
 }

 _X_HIDDEN __GLcontextModes *
 driConvertConfigs(const __DRIcoreExtension *core,
 		  __GLcontextModes *modes, const __DRIconfig **configs)
 {
     __GLcontextModes head, *tail, *m;

     tail = &head;
     head.next = NULL;
     for (m = modes; m; m = m->next) {
 	tail->next = createDriMode(core, m, configs);
 	if (tail->next == NULL) {
 	    /* no matching dri config for m */
 	    continue;
 	}


 	tail = tail->next;
     }

     _gl_context_modes_destroy(modes);

     return head.next;
 }

 _X_HIDDEN void
 driBindExtensions(__GLXscreenConfigs *psc, int dri2)
 {
     const __DRIextension **extensions;
     int i;

     extensions = psc->core->getExtensions(psc->__driScreen);

     for (i = 0; extensions[i]; i++) {
 #ifdef __DRI_COPY_SUB_BUFFER
 	if (strcmp(extensions[i]->name, __DRI_COPY_SUB_BUFFER) == 0) {
 	    psc->copySubBuffer = (__DRIcopySubBufferExtension *) extensions[i];
 	    __glXEnableDirectExtension(psc, "GLX_MESA_copy_sub_buffer_bit");
 	}
 #endif

 #ifdef __DRI_SWAP_CONTROL
 	if (strcmp(extensions[i]->name, __DRI_SWAP_CONTROL) == 0) {
 	    psc->swapControl = (__DRIswapControlExtension *) extensions[i];
 	    __glXEnableDirectExtension(psc, "GLX_SGI_swap_control");
 	    __glXEnableDirectExtension(psc, "GLX_MESA_swap_control");
 	}
 #endif

 #ifdef __DRI_ALLOCATE
 	if (strcmp(extensions[i]->name, __DRI_ALLOCATE) == 0) {
 	    psc->allocate = (__DRIallocateExtension *) extensions[i];
 	    __glXEnableDirectExtension(psc, "GLX_MESA_allocate_memory");
 	}
 #endif

 #ifdef __DRI_FRAME_TRACKING
 	if (strcmp(extensions[i]->name, __DRI_FRAME_TRACKING) == 0) {
 	    psc->frameTracking = (__DRIframeTrackingExtension *) extensions[i];
 	    __glXEnableDirectExtension(psc, "GLX_MESA_swap_frame_usage");
 	}
 #endif

 #ifdef __DRI_MEDIA_STREAM_COUNTER
 	if (strcmp(extensions[i]->name, __DRI_MEDIA_STREAM_COUNTER) == 0) {
 	    psc->msc = (__DRImediaStreamCounterExtension *) extensions[i];
 	    __glXEnableDirectExtension(psc, "GLX_SGI_video_sync");
 	}
 #endif

 #ifdef __DRI_SWAP_BUFFER_COUNTER
 	/* No driver supports this at this time and the extension is
 	 * not defined in dri_interface.h.  Will enable
 	 * GLX_OML_sync_control if implemented. */
 #endif

 #ifdef __DRI_READ_DRAWABLE
 	if (strcmp(extensions[i]->name, __DRI_READ_DRAWABLE) == 0) {
 	    __glXEnableDirectExtension(psc, "GLX_SGI_make_current_read");
 	}
 #endif

 #ifdef __DRI_TEX_BUFFER
 	if ((strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0) && dri2) {
 	    psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
 	    __glXEnableDirectExtension(psc, "GLX_EXT_texture_from_pixmap");
 	}
 #endif

 	/* Ignore unknown extensions */
     }
 }

 #endif /* GLX_DIRECT_RENDERING */
	/*
	* Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas.
	* Copyright © 2008 Red Hat, Inc.
	*
	* Permission is hereby granted, free of charge, to any person obtaining a
	* copy of this software and associated documentation files (the "Soft-
	* ware"), to deal in the Software without restriction, including without
	* limitation the rights to use, copy, modify, merge, publish, distribute,
	* and/or sell copies of the Software, and to permit persons to whom the
	* Software is furnished to do so, provided that the above copyright
	* notice(s) and this permission notice appear in all copies of the Soft-
	* ware and that both the above copyright notice(s) and this permission
	* notice appear in supporting documentation.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
	* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
	* ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY
	* RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN
	* THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSE-
	* QUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
	* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
	* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFOR-
	* MANCE OF THIS SOFTWARE.
	*
	* Except as contained in this notice, the name of a copyright holder shall
	* not be used in advertising or otherwise to promote the sale, use or
	* other dealings in this Software without prior written authorization of
	* the copyright holder.
	*
	* Authors:
	* Kevin E. Martin <kevin@precisioninsight.com>
	* Brian Paul <brian@precisioninsight.com>
	* Kristian Høgsberg (krh@redhat.com)
	*/

	#ifdef GLX_DIRECT_RENDERING

	#include <unistd.h>
	#include <dlfcn.h>
	#include "glheader.h"
	#include "glxclient.h"
	#include "glcontextmodes.h"
	#include "dri_common.h"

	#ifndef RTLD_NOW
	#define RTLD_NOW 0
	#endif
	#ifndef RTLD_GLOBAL
	#define RTLD_GLOBAL 0
	#endif

	_X_HIDDEN void InfoMessageF(const char *f, ...)
	{
	va_list args;
	const char *env;

	if ((env = getenv("LIBGL_DEBUG")) && strstr(env, "verbose")) {
	fprintf(stderr, "libGL: ");
	va_start(args, f);
	vfprintf(stderr, f, args);
	va_end(args);
	}
	}

	/**
	* Print error to stderr, unless LIBGL_DEBUG=="quiet".
	*/
	_X_HIDDEN void ErrorMessageF(const char *f, ...)
	{
	va_list args;
	const char *env;

	if ((env = getenv("LIBGL_DEBUG")) && !strstr(env, "quiet")) {
	fprintf(stderr, "libGL error: ");
	va_start(args, f);
	vfprintf(stderr, f, args);
	va_end(args);
	}
	}

	#ifndef DEFAULT_DRIVER_DIR
	/* this is normally defined in Mesa/configs/default with DRI_DRIVER_SEARCH_PATH */
	#define DEFAULT_DRIVER_DIR "/usr/local/lib/dri"
	#endif

	/**
	* Try to \c dlopen the named driver.
	*
	* This function adds the "_dri.so" suffix to the driver name and searches the
	* directories specified by the \c LIBGL_DRIVERS_PATH environment variable in
	* order to find the driver.
	*
	* \param driverName - a name like "tdfx", "i810", "mga", etc.
	*
	* \returns
	* A handle from \c dlopen, or \c NULL if driver file not found.
	*/
	_X_HIDDEN void driOpenDriver(const char driverName)
	{
	void glhandle, handle;
	const char libPaths, p, *next;
	char realDriverName[200];
	int len;

	/* Attempt to make sure libGL symbols will be visible to the driver */
	glhandle = dlopen("libGL.so.1", RTLD_NOW \| RTLD_GLOBAL);

	libPaths = NULL;
	if (geteuid() == getuid()) {
	/* don't allow setuid apps to use LIBGL_DRIVERS_PATH */
	libPaths = getenv("LIBGL_DRIVERS_PATH");
	if (!libPaths)
	libPaths = getenv("LIBGL_DRIVERS_DIR"); /* deprecated */
	}
	if (libPaths == NULL)
	libPaths = DEFAULT_DRIVER_DIR;

	handle = NULL;
	for (p = libPaths; *p; p = next) {
	next = strchr(p, ':');
	if (next == NULL) {
	len = strlen(p);
	next = p + len;
	} else {
	len = next - p;
	next++;
	}

	#ifdef GLX_USE_TLS
	snprintf(realDriverName, sizeof realDriverName,
	"%.*s/tls/%s_dri.so", len, p, driverName);
	InfoMessageF("OpenDriver: trying %s\n", realDriverName);
	handle = dlopen(realDriverName, RTLD_NOW \| RTLD_GLOBAL);
	#endif

	if ( handle == NULL ) {
	snprintf(realDriverName, sizeof realDriverName,
	"%.*s/%s_dri.so", len, p, driverName);
	InfoMessageF("OpenDriver: trying %s\n", realDriverName);
	handle = dlopen(realDriverName, RTLD_NOW \| RTLD_GLOBAL);
	}

	if ( handle != NULL )
	break;
	else
	ErrorMessageF("dlopen %s failed (%s)\n", realDriverName, dlerror());
	}

	if (!handle)
	ErrorMessageF("unable to load driver: %s_dri.so\n", driverName);

	if (glhandle)
	dlclose(glhandle);

	return handle;
	}

	_X_HIDDEN const __DRIsystemTimeExtension systemTimeExtension = {
	{ __DRI_SYSTEM_TIME, __DRI_SYSTEM_TIME_VERSION },
	__glXGetUST,
	__driGetMscRateOML
	};

	#define __ATTRIB(attrib, field) \
	{ attrib, offsetof(__GLcontextModes, field) }

	static const struct { unsigned int attrib, offset; } attribMap[] = {
	__ATTRIB(__DRI_ATTRIB_BUFFER_SIZE, rgbBits),
	__ATTRIB(__DRI_ATTRIB_LEVEL, level),
	__ATTRIB(__DRI_ATTRIB_RED_SIZE, redBits),
	__ATTRIB(__DRI_ATTRIB_GREEN_SIZE, greenBits),
	__ATTRIB(__DRI_ATTRIB_BLUE_SIZE, blueBits),
	__ATTRIB(__DRI_ATTRIB_ALPHA_SIZE, alphaBits),
	__ATTRIB(__DRI_ATTRIB_DEPTH_SIZE, depthBits),
	__ATTRIB(__DRI_ATTRIB_STENCIL_SIZE, stencilBits),
	__ATTRIB(__DRI_ATTRIB_ACCUM_RED_SIZE, accumRedBits),
	__ATTRIB(__DRI_ATTRIB_ACCUM_GREEN_SIZE, accumGreenBits),
	__ATTRIB(__DRI_ATTRIB_ACCUM_BLUE_SIZE, accumBlueBits),
	__ATTRIB(__DRI_ATTRIB_ACCUM_ALPHA_SIZE, accumAlphaBits),
	__ATTRIB(__DRI_ATTRIB_SAMPLE_BUFFERS, sampleBuffers),
	__ATTRIB(__DRI_ATTRIB_SAMPLES, samples),
	__ATTRIB(__DRI_ATTRIB_DOUBLE_BUFFER, doubleBufferMode),
	__ATTRIB(__DRI_ATTRIB_STEREO, stereoMode),
	__ATTRIB(__DRI_ATTRIB_AUX_BUFFERS, numAuxBuffers),
	#if 0
	__ATTRIB(__DRI_ATTRIB_TRANSPARENT_TYPE, transparentPixel),
	__ATTRIB(__DRI_ATTRIB_TRANSPARENT_INDEX_VALUE, transparentIndex),
	__ATTRIB(__DRI_ATTRIB_TRANSPARENT_RED_VALUE, transparentRed),
	__ATTRIB(__DRI_ATTRIB_TRANSPARENT_GREEN_VALUE, transparentGreen),
	__ATTRIB(__DRI_ATTRIB_TRANSPARENT_BLUE_VALUE, transparentBlue),
	__ATTRIB(__DRI_ATTRIB_TRANSPARENT_ALPHA_VALUE, transparentAlpha),
	__ATTRIB(__DRI_ATTRIB_RED_MASK, redMask),
	__ATTRIB(__DRI_ATTRIB_GREEN_MASK, greenMask),
	__ATTRIB(__DRI_ATTRIB_BLUE_MASK, blueMask),
	__ATTRIB(__DRI_ATTRIB_ALPHA_MASK, alphaMask),
	#endif
	__ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_WIDTH, maxPbufferWidth),
	__ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_HEIGHT, maxPbufferHeight),
	__ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_PIXELS, maxPbufferPixels),
	__ATTRIB(__DRI_ATTRIB_OPTIMAL_PBUFFER_WIDTH, optimalPbufferWidth),
	__ATTRIB(__DRI_ATTRIB_OPTIMAL_PBUFFER_HEIGHT, optimalPbufferHeight),
	#if 0
	__ATTRIB(__DRI_ATTRIB_SWAP_METHOD, swapMethod),
	#endif
	__ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_RGB, bindToTextureRgb),
	__ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_RGBA, bindToTextureRgba),
	__ATTRIB(__DRI_ATTRIB_BIND_TO_MIPMAP_TEXTURE, bindToMipmapTexture),
	__ATTRIB(__DRI_ATTRIB_YINVERTED, yInverted),
	};

	#define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))

	static int
	scalarEqual(__GLcontextModes *mode, unsigned int attrib, unsigned int value)
	{
	unsigned int glxValue;
	int i;

	for (i = 0; i < ARRAY_SIZE(attribMap); i++)
	if (attribMap[i].attrib == attrib) {
	glxValue = (unsigned int ) ((char *) mode + attribMap[i].offset);
	return glxValue == GLX_DONT_CARE \|\| glxValue == value;
	}

	return GL_TRUE; /* Is a non-existing attribute equal to value? */
	}

	static int
	driConfigEqual(const __DRIcoreExtension *core,
	__GLcontextModes modes, const __DRIconfig driConfig)
	{
	unsigned int attrib, value, glxValue;
	int i;

	i = 0;
	while (core->indexConfigAttrib(driConfig, i++, &attrib, &value)) {
	switch (attrib) {
	case __DRI_ATTRIB_RENDER_TYPE:
	glxValue = 0;
	if (value & __DRI_ATTRIB_RGBA_BIT) {
	glxValue \|= GLX_RGBA_BIT;
	} else if (value & __DRI_ATTRIB_COLOR_INDEX_BIT) {
	glxValue \|= GLX_COLOR_INDEX_BIT;
	}
	if (glxValue != modes->renderType)
	return GL_FALSE;
	break;

	case __DRI_ATTRIB_CONFIG_CAVEAT:
	if (value & __DRI_ATTRIB_NON_CONFORMANT_CONFIG)
	glxValue = GLX_NON_CONFORMANT_CONFIG;
	else if (value & __DRI_ATTRIB_SLOW_BIT)
	glxValue = GLX_SLOW_CONFIG;
	else
	glxValue = GLX_NONE;
	if (glxValue != modes->visualRating)
	return GL_FALSE;
	break;

	case __DRI_ATTRIB_BIND_TO_TEXTURE_TARGETS:
	glxValue = 0;
	if (value & __DRI_ATTRIB_TEXTURE_1D_BIT)
	glxValue \|= GLX_TEXTURE_1D_BIT_EXT;
	if (value & __DRI_ATTRIB_TEXTURE_2D_BIT)
	glxValue \|= GLX_TEXTURE_2D_BIT_EXT;
	if (value & __DRI_ATTRIB_TEXTURE_RECTANGLE_BIT)
	glxValue \|= GLX_TEXTURE_RECTANGLE_BIT_EXT;
	if (modes->bindToTextureTargets != GLX_DONT_CARE &&
	glxValue != modes->bindToTextureTargets)
	return GL_FALSE;
	break;

	default:
	if (!scalarEqual(modes, attrib, value))
	return GL_FALSE;
	}
	}

	return GL_TRUE;
	}

	static __GLcontextModes *
	createDriMode(const __DRIcoreExtension *core,
	__GLcontextModes modes, const __DRIconfig *driConfigs)
	{
	__GLXDRIconfigPrivate *config;
	int i;

	for (i = 0; driConfigs[i]; i++) {
	if (driConfigEqual(core, modes, driConfigs[i]))
	break;
	}

	if (driConfigs[i] == NULL)
	return NULL;

	config = Xmalloc(sizeof *config);
	if (config == NULL)
	return NULL;

	config->modes = *modes;
	config->driConfig = driConfigs[i];

	return &config->modes;
	}

	_X_HIDDEN __GLcontextModes *
	driConvertConfigs(const __DRIcoreExtension *core,
	__GLcontextModes modes, const __DRIconfig *configs)
	{
	__GLcontextModes head, tail, m;

	tail = &head;
	head.next = NULL;
	for (m = modes; m; m = m->next) {
	tail->next = createDriMode(core, m, configs);
	if (tail->next == NULL) {
	/* no matching dri config for m */
	continue;
	}


	tail = tail->next;
	}

	_gl_context_modes_destroy(modes);

	return head.next;
	}

	_X_HIDDEN void
	driBindExtensions(__GLXscreenConfigs *psc, int dri2)
	{
	const __DRIextension **extensions;
	int i;

	extensions = psc->core->getExtensions(psc->__driScreen);

	for (i = 0; extensions[i]; i++) {
	#ifdef __DRI_COPY_SUB_BUFFER
	if (strcmp(extensions[i]->name, __DRI_COPY_SUB_BUFFER) == 0) {
	psc->copySubBuffer = (__DRIcopySubBufferExtension *) extensions[i];
	__glXEnableDirectExtension(psc, "GLX_MESA_copy_sub_buffer_bit");
	}
	#endif

	#ifdef __DRI_SWAP_CONTROL
	if (strcmp(extensions[i]->name, __DRI_SWAP_CONTROL) == 0) {
	psc->swapControl = (__DRIswapControlExtension *) extensions[i];
	__glXEnableDirectExtension(psc, "GLX_SGI_swap_control");
	__glXEnableDirectExtension(psc, "GLX_MESA_swap_control");
	}
	#endif

	#ifdef __DRI_ALLOCATE
	if (strcmp(extensions[i]->name, __DRI_ALLOCATE) == 0) {
	psc->allocate = (__DRIallocateExtension *) extensions[i];
	__glXEnableDirectExtension(psc, "GLX_MESA_allocate_memory");
	}
	#endif

	#ifdef __DRI_FRAME_TRACKING
	if (strcmp(extensions[i]->name, __DRI_FRAME_TRACKING) == 0) {
	psc->frameTracking = (__DRIframeTrackingExtension *) extensions[i];
	__glXEnableDirectExtension(psc, "GLX_MESA_swap_frame_usage");
	}
	#endif

	#ifdef __DRI_MEDIA_STREAM_COUNTER
	if (strcmp(extensions[i]->name, __DRI_MEDIA_STREAM_COUNTER) == 0) {
	psc->msc = (__DRImediaStreamCounterExtension *) extensions[i];
	__glXEnableDirectExtension(psc, "GLX_SGI_video_sync");
	}
	#endif

	#ifdef __DRI_SWAP_BUFFER_COUNTER
	/* No driver supports this at this time and the extension is
	* not defined in dri_interface.h. Will enable
	* GLX_OML_sync_control if implemented. */
	#endif

	#ifdef __DRI_READ_DRAWABLE
	if (strcmp(extensions[i]->name, __DRI_READ_DRAWABLE) == 0) {
	__glXEnableDirectExtension(psc, "GLX_SGI_make_current_read");
	}
	#endif

	#ifdef __DRI_TEX_BUFFER
	if ((strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0) && dri2) {
	psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
	__glXEnableDirectExtension(psc, "GLX_EXT_texture_from_pixmap");
	}
	#endif

	/* Ignore unknown extensions */
	}
	}

	#endif /* GLX_DIRECT_RENDERING */