xserver git update 11/5/2010

1 files changed, 807 insertions, 805 deletions

diff --git a/xorg-server/glx/glxdri2.c b/xorg-server/glx/glxdri2.c
index 74d6ebc5d..f1396b54d 100644
--- a/xorg-server/glx/glxdri2.c
+++ b/xorg-server/glx/glxdri2.c
@@ -1,805 +1,807 @@
-/*
- * Copyright © 2007 Red Hat, Inc
- *
- * Permission to use, copy, modify, distribute, and sell this software
- * and its documentation for any purpose is hereby granted without
- * fee, provided that the above copyright notice appear in all copies
- * and that both that copyright notice and this permission notice
- * appear in supporting documentation, and that the name of Red Hat,
- * Inc not be used in advertising or publicity pertaining to
- * distribution of the software without specific, written prior
- * permission.  Red Hat, Inc makes no representations about the
- * suitability of this software for any purpose.  It is provided "as
- * is" without express or implied warranty.
- *
- * RED HAT, INC DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
- * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN
- * NO EVENT SHALL RED HAT, INC BE LIABLE FOR ANY SPECIAL, INDIRECT OR
- * CONSEQUENTIAL 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 PERFORMANCE OF THIS SOFTWARE.
- */
-
-#ifdef HAVE_DIX_CONFIG_H
-#include <dix-config.h>
-#endif
-
-#include <stdint.h>
-#include <stdio.h>
-#include <string.h>
-#include <errno.h>
-#include <dlfcn.h>
-
-#include <drm.h>
-#include <GL/gl.h>
-#include <GL/internal/dri_interface.h>
-#include <GL/glxtokens.h>
-
-#include <windowstr.h>
-#include <os.h>
-
-#define _XF86DRI_SERVER_
-#include <xf86drm.h>
-#include <xf86.h>
-#include <dri2.h>
-
-#include "glxserver.h"
-#include "glxutil.h"
-#include "glxdricommon.h"
-
-#include "g_disptab.h"
-#include "glapitable.h"
-#include "glapi.h"
-#include "glthread.h"
-#include "dispatch.h"
-#include "extension_string.h"
-
-typedef struct __GLXDRIscreen   __GLXDRIscreen;
-typedef struct __GLXDRIcontext  __GLXDRIcontext;
-typedef struct __GLXDRIdrawable __GLXDRIdrawable;
-
-struct __GLXDRIscreen {
-    __GLXscreen		 base;
-    __DRIscreen		*driScreen;
-    void		*driver;
-    int			 fd;
-
-    xf86EnterVTProc	*enterVT;
-    xf86LeaveVTProc	*leaveVT;
-
-    const __DRIcoreExtension *core;
-    const __DRIdri2Extension *dri2;
-    const __DRI2flushExtension *flush;
-    const __DRIcopySubBufferExtension *copySubBuffer;
-    const __DRIswapControlExtension *swapControl;
-    const __DRItexBufferExtension *texBuffer;
-
-    unsigned char glx_enable_bits[__GLX_EXT_BYTES];
-};
-
-struct __GLXDRIcontext {
-    __GLXcontext	 base;
-    __DRIcontext	*driContext;
-};
-
-#define MAX_DRAWABLE_BUFFERS 5
-
-struct __GLXDRIdrawable {
-    __GLXdrawable	 base;
-    __DRIdrawable	*driDrawable;
-    __GLXDRIscreen	*screen;
-
-    /* Dimensions as last reported by DRI2GetBuffers. */
-    int width;
-    int height;
-    __DRIbuffer buffers[MAX_DRAWABLE_BUFFERS];
-    int count;
-};
-
-static void
-__glXDRIdrawableDestroy(__GLXdrawable *drawable)
-{
-    __GLXDRIdrawable *private = (__GLXDRIdrawable *) drawable;
-    const __DRIcoreExtension *core = private->screen->core;
-    
-    (*core->destroyDrawable)(private->driDrawable);
-
-    __glXDrawableRelease(drawable);
-
-    xfree(private);
-}
-
-static void
-__glXDRIdrawableCopySubBuffer(__GLXdrawable *drawable,
-			       int x, int y, int w, int h)
-{
-    __GLXDRIdrawable *private = (__GLXDRIdrawable *) drawable;
-    BoxRec box;
-    RegionRec region;
-
-    box.x1 = x;
-    box.y1 = private->height - y - h;
-    box.x2 = x + w;
-    box.y2 = private->height - y;
-    REGION_INIT(drawable->pDraw->pScreen, &region, &box, 0);
-
-    DRI2CopyRegion(drawable->pDraw, &region,
-		   DRI2BufferFrontLeft, DRI2BufferBackLeft);
-}
-
-static void
-__glXDRIdrawableWaitX(__GLXdrawable *drawable)
-{
-    __GLXDRIdrawable *private = (__GLXDRIdrawable *) drawable;
-    BoxRec box;
-    RegionRec region;
-
-    box.x1 = 0;
-    box.y1 = 0;
-    box.x2 = private->width;
-    box.y2 = private->height;
-    REGION_INIT(drawable->pDraw->pScreen, &region, &box, 0);
-
-    DRI2CopyRegion(drawable->pDraw, &region,
-		   DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
-}
-
-static void
-__glXDRIdrawableWaitGL(__GLXdrawable *drawable)
-{
-    __GLXDRIdrawable *private = (__GLXDRIdrawable *) drawable;
-    BoxRec box;
-    RegionRec region;
-
-    box.x1 = 0;
-    box.y1 = 0;
-    box.x2 = private->width;
-    box.y2 = private->height;
-    REGION_INIT(drawable->pDraw->pScreen, &region, &box, 0);
-
-    DRI2CopyRegion(drawable->pDraw, &region,
-		   DRI2BufferFrontLeft, DRI2BufferFakeFrontLeft);
-}
-
-static void
-__glXdriSwapEvent(ClientPtr client, void *data, int type, CARD64 ust,
-		  CARD64 msc, CARD64 sbc)
-{
-    __GLXdrawable *drawable = data;
-    xGLXBufferSwapComplete wire;
-
-    if (!(drawable->eventMask & GLX_BUFFER_SWAP_COMPLETE_INTEL_MASK))
-	return;
-
-    wire.type = __glXEventBase + GLX_BufferSwapComplete;
-    switch (type) {
-    case DRI2_EXCHANGE_COMPLETE:
-	wire.event_type = GLX_EXCHANGE_COMPLETE_INTEL;
-	break;
-    case DRI2_BLIT_COMPLETE:
-	wire.event_type = GLX_BLIT_COMPLETE_INTEL;
-	break;
-    case DRI2_FLIP_COMPLETE:
-	wire.event_type = GLX_FLIP_COMPLETE_INTEL;
-	break;
-    default:
-	/* unknown swap completion type */
-	break;
-    }
-    wire.sequenceNumber = client->sequence;
-    wire.drawable = drawable->drawId;
-    wire.ust_hi = ust >> 32;
-    wire.ust_lo = ust & 0xffffffff;
-    wire.msc_hi = msc >> 32;
-    wire.msc_lo = msc & 0xffffffff;
-    wire.sbc_hi = sbc >> 32;
-    wire.sbc_lo = sbc & 0xffffffff;
-
-    WriteEventsToClient(client, 1, (xEvent *) &wire);
-}
-
-/*
- * Copy or flip back to front, honoring the swap interval if possible.
- *
- * If the kernel supports it, we request an event for the frame when the
- * swap should happen, then perform the copy when we receive it.
- */
-static GLboolean
-__glXDRIdrawableSwapBuffers(ClientPtr client, __GLXdrawable *drawable)
-{
-    __GLXDRIdrawable *priv = (__GLXDRIdrawable *) drawable;
-    __GLXDRIscreen *screen = priv->screen;
-    CARD64 unused;
-
-#if __DRI2_FLUSH_VERSION >= 3
-    if (screen->flush) {
-	(*screen->flush->flush)(priv->driDrawable);
-	(*screen->flush->invalidate)(priv->driDrawable);
-    }
-#else
-    if (screen->flush)
-	(*screen->flush->flushInvalidate)(priv->driDrawable);
-#endif
-
-    if (DRI2SwapBuffers(client, drawable->pDraw, 0, 0, 0, &unused,
-			__glXdriSwapEvent, drawable->pDraw) != Success)
-	return FALSE;
-
-    return TRUE;
-}
-
-static int
-__glXDRIdrawableSwapInterval(__GLXdrawable *drawable, int interval)
-{
-    if (interval <= 0) /* || interval > BIGNUM? */
-	return GLX_BAD_VALUE;
-
-    DRI2SwapInterval(drawable->pDraw, interval);
-
-    return 0;
-}
-
-static void
-__glXDRIcontextDestroy(__GLXcontext *baseContext)
-{
-    __GLXDRIcontext *context = (__GLXDRIcontext *) baseContext;
-    __GLXDRIscreen *screen = (__GLXDRIscreen *) context->base.pGlxScreen;
-
-    (*screen->core->destroyContext)(context->driContext);
-    __glXContextDestroy(&context->base);
-    xfree(context);
-}
-
-static int
-__glXDRIcontextMakeCurrent(__GLXcontext *baseContext)
-{
-    __GLXDRIcontext *context = (__GLXDRIcontext *) baseContext;
-    __GLXDRIdrawable *draw = (__GLXDRIdrawable *) baseContext->drawPriv;
-    __GLXDRIdrawable *read = (__GLXDRIdrawable *) baseContext->readPriv;
-    __GLXDRIscreen *screen = (__GLXDRIscreen *) context->base.pGlxScreen;
-
-    return (*screen->core->bindContext)(context->driContext,
-					draw->driDrawable,
-					read->driDrawable);
-}					      
-
-static int
-__glXDRIcontextLoseCurrent(__GLXcontext *baseContext)
-{
-    __GLXDRIcontext *context = (__GLXDRIcontext *) baseContext;
-    __GLXDRIscreen *screen = (__GLXDRIscreen *) context->base.pGlxScreen;
-
-    return (*screen->core->unbindContext)(context->driContext);
-}
-
-static int
-__glXDRIcontextCopy(__GLXcontext *baseDst, __GLXcontext *baseSrc,
-		    unsigned long mask)
-{
-    __GLXDRIcontext *dst = (__GLXDRIcontext *) baseDst;
-    __GLXDRIcontext *src = (__GLXDRIcontext *) baseSrc;
-    __GLXDRIscreen *screen = (__GLXDRIscreen *) dst->base.pGlxScreen;
-
-    return (*screen->core->copyContext)(dst->driContext,
-					src->driContext, mask);
-}
-
-static int
-__glXDRIcontextForceCurrent(__GLXcontext *baseContext)
-{
-    __GLXDRIcontext *context = (__GLXDRIcontext *) baseContext;
-    __GLXDRIdrawable *draw = (__GLXDRIdrawable *) baseContext->drawPriv;
-    __GLXDRIdrawable *read = (__GLXDRIdrawable *) baseContext->readPriv;
-    __GLXDRIscreen *screen = (__GLXDRIscreen *) context->base.pGlxScreen;
-
-    return (*screen->core->bindContext)(context->driContext,
-					draw->driDrawable,
-					read->driDrawable);
-}
-
-static Bool
-__glXDRIcontextWait(__GLXcontext *baseContext,
-		    __GLXclientState *cl, int *error)
-{
-    if (DRI2WaitSwap(cl->client, baseContext->drawPriv->pDraw)) {
-	*error = cl->client->noClientException;
-	return TRUE;
-    }
-
-    return FALSE;
-}
-
-#ifdef __DRI_TEX_BUFFER
-
-static int
-__glXDRIbindTexImage(__GLXcontext *baseContext,
-		     int buffer,
-		     __GLXdrawable *glxPixmap)
-{
-    __GLXDRIdrawable *drawable = (__GLXDRIdrawable *) glxPixmap;
-    const __DRItexBufferExtension *texBuffer = drawable->screen->texBuffer;
-    __GLXDRIcontext *context = (__GLXDRIcontext *) baseContext;
-
-    if (texBuffer == NULL)
-        return Success;
-
-#if __DRI_TEX_BUFFER_VERSION >= 2
-    if (texBuffer->base.version >= 2 && texBuffer->setTexBuffer2 != NULL) {
-	(*texBuffer->setTexBuffer2)(context->driContext,
-				    glxPixmap->target,
-				    glxPixmap->format,
-				    drawable->driDrawable);
-    } else
-#endif
-    {
-	texBuffer->setTexBuffer(context->driContext,
-				glxPixmap->target,
-				drawable->driDrawable);
-    }
-
-    return Success;
-}
-
-static int
-__glXDRIreleaseTexImage(__GLXcontext *baseContext,
-			int buffer,
-			__GLXdrawable *pixmap)
-{
-    /* FIXME: Just unbind the texture? */
-    return Success;
-}
-
-#else
-
-static int
-__glXDRIbindTexImage(__GLXcontext *baseContext,
-		     int buffer,
-		     __GLXdrawable *glxPixmap)
-{
-    return Success;
-}
-
-static int
-__glXDRIreleaseTexImage(__GLXcontext *baseContext,
-			int buffer,
-			__GLXdrawable *pixmap)
-{
-    return Success;
-}
-
-#endif
-
-static __GLXtextureFromPixmap __glXDRItextureFromPixmap = {
-    __glXDRIbindTexImage,
-    __glXDRIreleaseTexImage
-};
-
-static void
-__glXDRIscreenDestroy(__GLXscreen *baseScreen)
-{
-    __GLXDRIscreen *screen = (__GLXDRIscreen *) baseScreen;
-
-    (*screen->core->destroyScreen)(screen->driScreen);
-
-    dlclose(screen->driver);
-
-    __glXScreenDestroy(baseScreen);
-
-    xfree(screen);
-}
-
-static __GLXcontext *
-__glXDRIscreenCreateContext(__GLXscreen *baseScreen,
-			    __GLXconfig *glxConfig,
-			    __GLXcontext *baseShareContext)
-{
-    __GLXDRIscreen *screen = (__GLXDRIscreen *) baseScreen;
-    __GLXDRIcontext *context, *shareContext;
-    __GLXDRIconfig *config = (__GLXDRIconfig *) glxConfig;
-    __DRIcontext *driShare;
-
-    shareContext = (__GLXDRIcontext *) baseShareContext;
-    if (shareContext)
-	driShare = shareContext->driContext;
-    else
-	driShare = NULL;
-
-    context = xcalloc(1, sizeof *context);
-    if (context == NULL)
-	return NULL;
-
-    context->base.destroy           = __glXDRIcontextDestroy;
-    context->base.makeCurrent       = __glXDRIcontextMakeCurrent;
-    context->base.loseCurrent       = __glXDRIcontextLoseCurrent;
-    context->base.copy              = __glXDRIcontextCopy;
-    context->base.forceCurrent      = __glXDRIcontextForceCurrent;
-    context->base.textureFromPixmap = &__glXDRItextureFromPixmap;
-    context->base.wait              = __glXDRIcontextWait;
-
-    context->driContext =
-	(*screen->dri2->createNewContext)(screen->driScreen,
-					  config->driConfig,
-					  driShare, context);
-    if (context->driContext == NULL) {
-	    xfree(context);
-        return NULL;
-    }
-
-    return &context->base;
-}
-
-static __GLXdrawable *
-__glXDRIscreenCreateDrawable(__GLXscreen *screen,
-			     DrawablePtr pDraw,
-			     int type,
-			     XID drawId,
-			     __GLXconfig *glxConfig)
-{
-    __GLXDRIscreen *driScreen = (__GLXDRIscreen *) screen;
-    __GLXDRIconfig *config = (__GLXDRIconfig *) glxConfig;
-    __GLXDRIdrawable *private;
-
-    private = xcalloc(1, sizeof *private);
-    if (private == NULL)
-	return NULL;
-
-    private->screen = driScreen;
-    if (!__glXDrawableInit(&private->base, screen,
-			   pDraw, type, drawId, glxConfig)) {
-        xfree(private);
-	return NULL;
-    }
-
-    private->base.destroy       = __glXDRIdrawableDestroy;
-    private->base.swapBuffers   = __glXDRIdrawableSwapBuffers;
-    private->base.copySubBuffer = __glXDRIdrawableCopySubBuffer;
-    private->base.waitGL	= __glXDRIdrawableWaitGL;
-    private->base.waitX		= __glXDRIdrawableWaitX;
-
-    if (DRI2CreateDrawable(pDraw)) {
-	    xfree(private);
-	    return NULL;
-    }
-
-    private->driDrawable =
-	(*driScreen->dri2->createNewDrawable)(driScreen->driScreen,
-					      config->driConfig, private);
-
-    return &private->base;
-}
-
-static __DRIbuffer *
-dri2GetBuffers(__DRIdrawable *driDrawable,
-	       int *width, int *height,
-	       unsigned int *attachments, int count,
-	       int *out_count, void *loaderPrivate)
-{
-    __GLXDRIdrawable *private = loaderPrivate;
-    DRI2BufferPtr *buffers;
-    int i;
-    int j;
-
-    buffers = DRI2GetBuffers(private->base.pDraw,
-			     width, height, attachments, count, out_count);
-    if (*out_count > MAX_DRAWABLE_BUFFERS) {
-	*out_count = 0;
-	return NULL;
-    }
-	
-    private->width = *width;
-    private->height = *height;
-
-    /* This assumes the DRI2 buffer attachment tokens matches the
-     * __DRIbuffer tokens. */
-    j = 0;
-    for (i = 0; i < *out_count; i++) {
-	/* Do not send the real front buffer of a window to the client.
-	 */
-	if ((private->base.pDraw->type == DRAWABLE_WINDOW)
-	    && (buffers[i]->attachment == DRI2BufferFrontLeft)) {
-	    continue;
-	}
-
-	private->buffers[j].attachment = buffers[i]->attachment;
-	private->buffers[j].name = buffers[i]->name;
-	private->buffers[j].pitch = buffers[i]->pitch;
-	private->buffers[j].cpp = buffers[i]->cpp;
-	private->buffers[j].flags = buffers[i]->flags;
-	j++;
-    }
-
-    *out_count = j;
-    return private->buffers;
-}
-
-static __DRIbuffer *
-dri2GetBuffersWithFormat(__DRIdrawable *driDrawable,
-			 int *width, int *height,
-			 unsigned int *attachments, int count,
-			 int *out_count, void *loaderPrivate)
-{
-    __GLXDRIdrawable *private = loaderPrivate;
-    DRI2BufferPtr *buffers;
-    int i;
-    int j = 0;
-
-    buffers = DRI2GetBuffersWithFormat(private->base.pDraw,
-				       width, height, attachments, count,
-				       out_count);
-    if (*out_count > MAX_DRAWABLE_BUFFERS) {
-	*out_count = 0;
-	return NULL;
-    }
-
-    private->width = *width;
-    private->height = *height;
-
-    /* This assumes the DRI2 buffer attachment tokens matches the
-     * __DRIbuffer tokens. */
-    for (i = 0; i < *out_count; i++) {
-	/* Do not send the real front buffer of a window to the client.
-	 */
-	if ((private->base.pDraw->type == DRAWABLE_WINDOW)
-	    && (buffers[i]->attachment == DRI2BufferFrontLeft)) {
-	    continue;
-	}
-
-	private->buffers[j].attachment = buffers[i]->attachment;
-	private->buffers[j].name = buffers[i]->name;
-	private->buffers[j].pitch = buffers[i]->pitch;
-	private->buffers[j].cpp = buffers[i]->cpp;
-	private->buffers[j].flags = buffers[i]->flags;
-	j++;
-    }
-
-    *out_count = j;
-    return private->buffers;
-}
-
-static void 
-dri2FlushFrontBuffer(__DRIdrawable *driDrawable, void *loaderPrivate)
-{
-    (void) driDrawable;
-    __glXDRIdrawableWaitGL((__GLXdrawable *) loaderPrivate);
-}
-
-static const __DRIdri2LoaderExtension loaderExtension = {
-    { __DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION },
-    dri2GetBuffers,
-    dri2FlushFrontBuffer,
-    dri2GetBuffersWithFormat,
-};
-
-static const __DRIextension *loader_extensions[] = {
-    &systemTimeExtension.base,
-    &loaderExtension.base,
-    NULL
-};
-
-static const char dri_driver_path[] = DRI_DRIVER_PATH;
-
-static Bool
-glxDRIEnterVT (int index, int flags)
-{
-    __GLXDRIscreen *screen = (__GLXDRIscreen *) 
-	glxGetScreen(screenInfo.screens[index]);
-
-    LogMessage(X_INFO, "AIGLX: Resuming AIGLX clients after VT switch\n");
-
-    if (!(*screen->enterVT) (index, flags))
-	return FALSE;
-    
-    glxResumeClients();
-
-    return TRUE;
-}
-
-static void
-glxDRILeaveVT (int index, int flags)
-{
-    __GLXDRIscreen *screen = (__GLXDRIscreen *)
-	glxGetScreen(screenInfo.screens[index]);
-
-    LogMessage(X_INFO, "AIGLX: Suspending AIGLX clients for VT switch\n");
-
-    glxSuspendClients();
-
-    return (*screen->leaveVT) (index, flags);
-}
-
-static void
-initializeExtensions(__GLXDRIscreen *screen)
-{
-    ScreenPtr pScreen = screen->base.pScreen;
-    const __DRIextension **extensions;
-    int i;
-
-    extensions = screen->core->getExtensions(screen->driScreen);
-
-    __glXEnableExtension(screen->glx_enable_bits,
-			 "GLX_MESA_copy_sub_buffer");
-    LogMessage(X_INFO, "AIGLX: enabled GLX_MESA_copy_sub_buffer\n");
-
-    __glXEnableExtension(screen->glx_enable_bits, "GLX_INTEL_swap_event");
-    LogMessage(X_INFO, "AIGLX: enabled GLX_INTEL_swap_event\n");
-
-    if (DRI2HasSwapControl(pScreen)) {
-	__glXEnableExtension(screen->glx_enable_bits,
-			     "GLX_SGI_swap_control");
-	__glXEnableExtension(screen->glx_enable_bits,
-			     "GLX_MESA_swap_control");
-	LogMessage(X_INFO, "AIGLX: enabled GLX_SGI_swap_control and GLX_MESA_swap_control\n");
-    }
-
-    for (i = 0; extensions[i]; i++) {
-#ifdef __DRI_READ_DRAWABLE
-	if (strcmp(extensions[i]->name, __DRI_READ_DRAWABLE) == 0) {
-	    __glXEnableExtension(screen->glx_enable_bits,
-				 "GLX_SGI_make_current_read");
-
-	    LogMessage(X_INFO, "AIGLX: enabled GLX_SGI_make_current_read\n");
-	}
-#endif
-
-#ifdef __DRI_TEX_BUFFER
-	if (strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0) {
-	    screen->texBuffer =
-		(const __DRItexBufferExtension *) extensions[i];
-	    /* GLX_EXT_texture_from_pixmap is always enabled. */
-	    LogMessage(X_INFO, "AIGLX: GLX_EXT_texture_from_pixmap backed by buffer objects\n");
-	}
-#endif
-
-#ifdef __DRI2_FLUSH
-	if (strcmp(extensions[i]->name, __DRI2_FLUSH) == 0 &&
-	    extensions[i]->version >= __DRI2_FLUSH_VERSION) {
-		screen->flush = (__DRI2flushExtension *) extensions[i];
-	}
-#endif
-
-	/* Ignore unknown extensions */
-    }
-}
-
-static __GLXscreen *
-__glXDRIscreenProbe(ScreenPtr pScreen)
-{
-    const char *driverName, *deviceName;
-    __GLXDRIscreen *screen;
-    char filename[128];
-    size_t buffer_size;
-    ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
-    const __DRIextension **extensions;
-    const __DRIconfig **driConfigs;
-    int i;
-
-    screen = xcalloc(1, sizeof *screen);
-    if (screen == NULL)
-	return NULL;
-
-    if (!xf86LoaderCheckSymbol("DRI2Connect") ||
-	!DRI2Connect(pScreen, DRI2DriverDRI,
-		     &screen->fd, &driverName, &deviceName)) {
-	LogMessage(X_INFO,
-		   "AIGLX: Screen %d is not DRI2 capable\n", pScreen->myNum);
-	return NULL;
-    }
-
-    screen->base.destroy        = __glXDRIscreenDestroy;
-    screen->base.createContext  = __glXDRIscreenCreateContext;
-    screen->base.createDrawable = __glXDRIscreenCreateDrawable;
-    screen->base.swapInterval   = __glXDRIdrawableSwapInterval;
-    screen->base.pScreen       = pScreen;
-
-    __glXInitExtensionEnableBits(screen->glx_enable_bits);
-
-    snprintf(filename, sizeof filename,
-	     "%s/%s_dri.so", dri_driver_path, driverName);
-
-    screen->driver = dlopen(filename, RTLD_LAZY | RTLD_LOCAL);
-    if (screen->driver == NULL) {
-	LogMessage(X_ERROR, "AIGLX error: dlopen of %s failed (%s)\n",
-		   filename, dlerror());
-        goto handle_error;
-    }
-
-    extensions = dlsym(screen->driver, __DRI_DRIVER_EXTENSIONS);
-    if (extensions == NULL) {
-	LogMessage(X_ERROR, "AIGLX error: %s exports no extensions (%s)\n",
-		   driverName, dlerror());
-	goto handle_error;
-    }
-    
-    for (i = 0; extensions[i]; i++) {
-        if (strcmp(extensions[i]->name, __DRI_CORE) == 0 &&
-	    extensions[i]->version >= __DRI_CORE_VERSION) {
-		screen->core = (const __DRIcoreExtension *) extensions[i];
-	}
-        if (strcmp(extensions[i]->name, __DRI_DRI2) == 0 &&
-	    extensions[i]->version >= __DRI_DRI2_VERSION) {
-		screen->dri2 = (const __DRIdri2Extension *) extensions[i];
-	}
-    }
-
-    if (screen->core == NULL || screen->dri2 == NULL) {
-	LogMessage(X_ERROR, "AIGLX error: %s exports no DRI extension\n",
-		   driverName);
-	goto handle_error;
-    }
-
-    screen->driScreen =
-	(*screen->dri2->createNewScreen)(pScreen->myNum,
-					 screen->fd,
-					 loader_extensions,
-					 &driConfigs,
-					 screen);
-
-    if (screen->driScreen == NULL) {
-	LogMessage(X_ERROR,
-		   "AIGLX error: Calling driver entry point failed\n");
-	goto handle_error;
-    }
-
-    initializeExtensions(screen);
-
-    screen->base.fbconfigs = glxConvertConfigs(screen->core, driConfigs,
-					       GLX_WINDOW_BIT |
-					       GLX_PIXMAP_BIT |
-					       GLX_PBUFFER_BIT);
-
-    __glXScreenInit(&screen->base, pScreen);
-
-    /* The first call simply determines the length of the extension string.
-     * This allows us to allocate some memory to hold the extension string,
-     * but it requires that we call __glXGetExtensionString a second time.
-     */
-    buffer_size = __glXGetExtensionString(screen->glx_enable_bits, NULL);
-    if (buffer_size > 0) {
-	if (screen->base.GLXextensions != NULL) {
-	    xfree(screen->base.GLXextensions);
-	}
-
-	screen->base.GLXextensions = xnfalloc(buffer_size);
-	(void) __glXGetExtensionString(screen->glx_enable_bits, 
-				       screen->base.GLXextensions);
-    }
-
-    /* We're going to assume (perhaps incorrectly?) that all DRI2-enabled
-     * drivers support the required extensions for GLX 1.4.  The extensions
-     * we're assuming are:
-     *
-     *    - GLX_SGI_make_current_read (1.3)
-     *    - GLX_SGIX_fbconfig (1.3)
-     *    - GLX_SGIX_pbuffer (1.3)
-     *    - GLX_ARB_multisample (1.4)
-     */
-    screen->base.GLXmajor = 1;
-    screen->base.GLXminor = 4;
-    
-    screen->enterVT = pScrn->EnterVT;
-    pScrn->EnterVT = glxDRIEnterVT; 
-    screen->leaveVT = pScrn->LeaveVT;
-    pScrn->LeaveVT = glxDRILeaveVT;
-
-    LogMessage(X_INFO,
-	       "AIGLX: Loaded and initialized %s\n", filename);
-
-    return &screen->base;
-
- handle_error:
-    if (screen->driver)
-        dlclose(screen->driver);
-
-    xfree(screen);
-
-    LogMessage(X_ERROR, "AIGLX: reverting to software rendering\n");
-
-    return NULL;
-}
-
-_X_EXPORT __GLXprovider __glXDRI2Provider = {
-    __glXDRIscreenProbe,
-    "DRI2",
-    NULL
-};
+/*

+ * Copyright © 2007 Red Hat, Inc

+ *

+ * Permission to use, copy, modify, distribute, and sell this software

+ * and its documentation for any purpose is hereby granted without

+ * fee, provided that the above copyright notice appear in all copies

+ * and that both that copyright notice and this permission notice

+ * appear in supporting documentation, and that the name of Red Hat,

+ * Inc not be used in advertising or publicity pertaining to

+ * distribution of the software without specific, written prior

+ * permission.  Red Hat, Inc makes no representations about the

+ * suitability of this software for any purpose.  It is provided "as

+ * is" without express or implied warranty.

+ *

+ * RED HAT, INC DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,

+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN

+ * NO EVENT SHALL RED HAT, INC BE LIABLE FOR ANY SPECIAL, INDIRECT OR

+ * CONSEQUENTIAL 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 PERFORMANCE OF THIS SOFTWARE.

+ */

+

+#ifdef HAVE_DIX_CONFIG_H

+#include <dix-config.h>

+#endif

+

+#include <stdint.h>

+#include <stdio.h>

+#include <string.h>

+#include <errno.h>

+#include <dlfcn.h>

+

+#include <drm.h>

+#include <GL/gl.h>

+#include <GL/internal/dri_interface.h>

+#include <GL/glxtokens.h>

+

+#include <windowstr.h>

+#include <os.h>

+

+#define _XF86DRI_SERVER_

+#include <xf86drm.h>

+#include <xf86.h>

+#include <dri2.h>

+

+#include "glxserver.h"

+#include "glxutil.h"

+#include "glxdricommon.h"

+

+#include "g_disptab.h"

+#include "glapitable.h"

+#include "glapi.h"

+#include "glthread.h"

+#include "dispatch.h"

+#include "extension_string.h"

+

+typedef struct __GLXDRIscreen   __GLXDRIscreen;

+typedef struct __GLXDRIcontext  __GLXDRIcontext;

+typedef struct __GLXDRIdrawable __GLXDRIdrawable;

+

+struct __GLXDRIscreen {

+    __GLXscreen		 base;

+    __DRIscreen		*driScreen;

+    void		*driver;

+    int			 fd;

+

+    xf86EnterVTProc	*enterVT;

+    xf86LeaveVTProc	*leaveVT;

+

+    const __DRIcoreExtension *core;

+    const __DRIdri2Extension *dri2;

+    const __DRI2flushExtension *flush;

+    const __DRIcopySubBufferExtension *copySubBuffer;

+    const __DRIswapControlExtension *swapControl;

+    const __DRItexBufferExtension *texBuffer;

+

+    unsigned char glx_enable_bits[__GLX_EXT_BYTES];

+};

+

+struct __GLXDRIcontext {

+    __GLXcontext	 base;

+    __DRIcontext	*driContext;

+};

+

+#define MAX_DRAWABLE_BUFFERS 5

+

+struct __GLXDRIdrawable {

+    __GLXdrawable	 base;

+    __DRIdrawable	*driDrawable;

+    __GLXDRIscreen	*screen;

+

+    /* Dimensions as last reported by DRI2GetBuffers. */

+    int width;

+    int height;

+    __DRIbuffer buffers[MAX_DRAWABLE_BUFFERS];

+    int count;

+};

+

+static void

+__glXDRIdrawableDestroy(__GLXdrawable *drawable)

+{

+    __GLXDRIdrawable *private = (__GLXDRIdrawable *) drawable;

+    const __DRIcoreExtension *core = private->screen->core;

+    

+    (*core->destroyDrawable)(private->driDrawable);

+

+    __glXDrawableRelease(drawable);

+

+    xfree(private);

+}

+

+static void

+__glXDRIdrawableCopySubBuffer(__GLXdrawable *drawable,

+			       int x, int y, int w, int h)

+{

+    __GLXDRIdrawable *private = (__GLXDRIdrawable *) drawable;

+    BoxRec box;

+    RegionRec region;

+

+    box.x1 = x;

+    box.y1 = private->height - y - h;

+    box.x2 = x + w;

+    box.y2 = private->height - y;

+    REGION_INIT(drawable->pDraw->pScreen, &region, &box, 0);

+

+    DRI2CopyRegion(drawable->pDraw, &region,

+		   DRI2BufferFrontLeft, DRI2BufferBackLeft);

+}

+

+static void

+__glXDRIdrawableWaitX(__GLXdrawable *drawable)

+{

+    __GLXDRIdrawable *private = (__GLXDRIdrawable *) drawable;

+    BoxRec box;

+    RegionRec region;

+

+    box.x1 = 0;

+    box.y1 = 0;

+    box.x2 = private->width;

+    box.y2 = private->height;

+    REGION_INIT(drawable->pDraw->pScreen, &region, &box, 0);

+

+    DRI2CopyRegion(drawable->pDraw, &region,

+		   DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);

+}

+

+static void

+__glXDRIdrawableWaitGL(__GLXdrawable *drawable)

+{

+    __GLXDRIdrawable *private = (__GLXDRIdrawable *) drawable;

+    BoxRec box;

+    RegionRec region;

+

+    box.x1 = 0;

+    box.y1 = 0;

+    box.x2 = private->width;

+    box.y2 = private->height;

+    REGION_INIT(drawable->pDraw->pScreen, &region, &box, 0);

+

+    DRI2CopyRegion(drawable->pDraw, &region,

+		   DRI2BufferFrontLeft, DRI2BufferFakeFrontLeft);

+}

+

+static void

+__glXdriSwapEvent(ClientPtr client, void *data, int type, CARD64 ust,

+		  CARD64 msc, CARD64 sbc)

+{

+    __GLXdrawable *drawable = data;

+    xGLXBufferSwapComplete wire;

+

+    if (!(drawable->eventMask & GLX_BUFFER_SWAP_COMPLETE_INTEL_MASK))

+	return;

+

+    wire.type = __glXEventBase + GLX_BufferSwapComplete;

+    switch (type) {

+    case DRI2_EXCHANGE_COMPLETE:

+	wire.event_type = GLX_EXCHANGE_COMPLETE_INTEL;

+	break;

+    case DRI2_BLIT_COMPLETE:

+	wire.event_type = GLX_BLIT_COMPLETE_INTEL;

+	break;

+    case DRI2_FLIP_COMPLETE:

+	wire.event_type = GLX_FLIP_COMPLETE_INTEL;

+	break;

+    default:

+	/* unknown swap completion type */

+	break;

+    }

+    wire.sequenceNumber = client->sequence;

+    wire.drawable = drawable->drawId;

+    wire.ust_hi = ust >> 32;

+    wire.ust_lo = ust & 0xffffffff;

+    wire.msc_hi = msc >> 32;

+    wire.msc_lo = msc & 0xffffffff;

+    wire.sbc_hi = sbc >> 32;

+    wire.sbc_lo = sbc & 0xffffffff;

+

+    WriteEventsToClient(client, 1, (xEvent *) &wire);

+}

+

+/*

+ * Copy or flip back to front, honoring the swap interval if possible.

+ *

+ * If the kernel supports it, we request an event for the frame when the

+ * swap should happen, then perform the copy when we receive it.

+ */

+static GLboolean

+__glXDRIdrawableSwapBuffers(ClientPtr client, __GLXdrawable *drawable)

+{

+    __GLXDRIdrawable *priv = (__GLXDRIdrawable *) drawable;

+    __GLXDRIscreen *screen = priv->screen;

+    CARD64 unused;

+

+#if __DRI2_FLUSH_VERSION >= 3

+    if (screen->flush) {

+	(*screen->flush->flush)(priv->driDrawable);

+	(*screen->flush->invalidate)(priv->driDrawable);

+    }

+#else

+    if (screen->flush)

+	(*screen->flush->flushInvalidate)(priv->driDrawable);

+#endif

+

+    if (DRI2SwapBuffers(client, drawable->pDraw, 0, 0, 0, &unused,

+			__glXdriSwapEvent, drawable->pDraw) != Success)

+	return FALSE;

+

+    return TRUE;

+}

+

+static int

+__glXDRIdrawableSwapInterval(__GLXdrawable *drawable, int interval)

+{

+    if (interval <= 0) /* || interval > BIGNUM? */

+	return GLX_BAD_VALUE;

+

+    DRI2SwapInterval(drawable->pDraw, interval);

+

+    return 0;

+}

+

+static void

+__glXDRIcontextDestroy(__GLXcontext *baseContext)

+{

+    __GLXDRIcontext *context = (__GLXDRIcontext *) baseContext;

+    __GLXDRIscreen *screen = (__GLXDRIscreen *) context->base.pGlxScreen;

+

+    (*screen->core->destroyContext)(context->driContext);

+    __glXContextDestroy(&context->base);

+    xfree(context);

+}

+

+static int

+__glXDRIcontextMakeCurrent(__GLXcontext *baseContext)

+{

+    __GLXDRIcontext *context = (__GLXDRIcontext *) baseContext;

+    __GLXDRIdrawable *draw = (__GLXDRIdrawable *) baseContext->drawPriv;

+    __GLXDRIdrawable *read = (__GLXDRIdrawable *) baseContext->readPriv;

+    __GLXDRIscreen *screen = (__GLXDRIscreen *) context->base.pGlxScreen;

+

+    return (*screen->core->bindContext)(context->driContext,

+					draw->driDrawable,

+					read->driDrawable);

+}					      

+

+static int

+__glXDRIcontextLoseCurrent(__GLXcontext *baseContext)

+{

+    __GLXDRIcontext *context = (__GLXDRIcontext *) baseContext;

+    __GLXDRIscreen *screen = (__GLXDRIscreen *) context->base.pGlxScreen;

+

+    return (*screen->core->unbindContext)(context->driContext);

+}

+

+static int

+__glXDRIcontextCopy(__GLXcontext *baseDst, __GLXcontext *baseSrc,

+		    unsigned long mask)

+{

+    __GLXDRIcontext *dst = (__GLXDRIcontext *) baseDst;

+    __GLXDRIcontext *src = (__GLXDRIcontext *) baseSrc;

+    __GLXDRIscreen *screen = (__GLXDRIscreen *) dst->base.pGlxScreen;

+

+    return (*screen->core->copyContext)(dst->driContext,

+					src->driContext, mask);

+}

+

+static int

+__glXDRIcontextForceCurrent(__GLXcontext *baseContext)

+{

+    __GLXDRIcontext *context = (__GLXDRIcontext *) baseContext;

+    __GLXDRIdrawable *draw = (__GLXDRIdrawable *) baseContext->drawPriv;

+    __GLXDRIdrawable *read = (__GLXDRIdrawable *) baseContext->readPriv;

+    __GLXDRIscreen *screen = (__GLXDRIscreen *) context->base.pGlxScreen;

+

+    return (*screen->core->bindContext)(context->driContext,

+					draw->driDrawable,

+					read->driDrawable);

+}

+

+static Bool

+__glXDRIcontextWait(__GLXcontext *baseContext,

+		    __GLXclientState *cl, int *error)

+{

+    if (DRI2WaitSwap(cl->client, baseContext->drawPriv->pDraw)) {

+	*error = cl->client->noClientException;

+	return TRUE;

+    }

+

+    return FALSE;

+}

+

+#ifdef __DRI_TEX_BUFFER

+

+static int

+__glXDRIbindTexImage(__GLXcontext *baseContext,

+		     int buffer,

+		     __GLXdrawable *glxPixmap)

+{

+    __GLXDRIdrawable *drawable = (__GLXDRIdrawable *) glxPixmap;

+    const __DRItexBufferExtension *texBuffer = drawable->screen->texBuffer;

+    __GLXDRIcontext *context = (__GLXDRIcontext *) baseContext;

+

+    if (texBuffer == NULL)

+        return Success;

+

+#if __DRI_TEX_BUFFER_VERSION >= 2

+    if (texBuffer->base.version >= 2 && texBuffer->setTexBuffer2 != NULL) {

+	(*texBuffer->setTexBuffer2)(context->driContext,

+				    glxPixmap->target,

+				    glxPixmap->format,

+				    drawable->driDrawable);

+    } else

+#endif

+    {

+	texBuffer->setTexBuffer(context->driContext,

+				glxPixmap->target,

+				drawable->driDrawable);

+    }

+

+    return Success;

+}

+

+static int

+__glXDRIreleaseTexImage(__GLXcontext *baseContext,

+			int buffer,

+			__GLXdrawable *pixmap)

+{

+    /* FIXME: Just unbind the texture? */

+    return Success;

+}

+

+#else

+

+static int

+__glXDRIbindTexImage(__GLXcontext *baseContext,

+		     int buffer,

+		     __GLXdrawable *glxPixmap)

+{

+    return Success;

+}

+

+static int

+__glXDRIreleaseTexImage(__GLXcontext *baseContext,

+			int buffer,

+			__GLXdrawable *pixmap)

+{

+    return Success;

+}

+

+#endif

+

+static __GLXtextureFromPixmap __glXDRItextureFromPixmap = {

+    __glXDRIbindTexImage,

+    __glXDRIreleaseTexImage

+};

+

+static void

+__glXDRIscreenDestroy(__GLXscreen *baseScreen)

+{

+    __GLXDRIscreen *screen = (__GLXDRIscreen *) baseScreen;

+

+    (*screen->core->destroyScreen)(screen->driScreen);

+

+    dlclose(screen->driver);

+

+    __glXScreenDestroy(baseScreen);

+

+    xfree(screen);

+}

+

+static __GLXcontext *

+__glXDRIscreenCreateContext(__GLXscreen *baseScreen,

+			    __GLXconfig *glxConfig,

+			    __GLXcontext *baseShareContext)

+{

+    __GLXDRIscreen *screen = (__GLXDRIscreen *) baseScreen;

+    __GLXDRIcontext *context, *shareContext;

+    __GLXDRIconfig *config = (__GLXDRIconfig *) glxConfig;

+    __DRIcontext *driShare;

+

+    shareContext = (__GLXDRIcontext *) baseShareContext;

+    if (shareContext)

+	driShare = shareContext->driContext;

+    else

+	driShare = NULL;

+

+    context = xcalloc(1, sizeof *context);

+    if (context == NULL)

+	return NULL;

+

+    context->base.destroy           = __glXDRIcontextDestroy;

+    context->base.makeCurrent       = __glXDRIcontextMakeCurrent;

+    context->base.loseCurrent       = __glXDRIcontextLoseCurrent;

+    context->base.copy              = __glXDRIcontextCopy;

+    context->base.forceCurrent      = __glXDRIcontextForceCurrent;

+    context->base.textureFromPixmap = &__glXDRItextureFromPixmap;

+    context->base.wait              = __glXDRIcontextWait;

+

+    context->driContext =

+	(*screen->dri2->createNewContext)(screen->driScreen,

+					  config->driConfig,

+					  driShare, context);

+    if (context->driContext == NULL) {

+	    xfree(context);

+        return NULL;

+    }

+

+    return &context->base;

+}

+

+static __GLXdrawable *

+__glXDRIscreenCreateDrawable(ClientPtr client,

+			     __GLXscreen *screen,

+			     DrawablePtr pDraw,

+			     XID drawId,

+			     int type,

+			     XID glxDrawId,

+			     __GLXconfig *glxConfig)

+{

+    __GLXDRIscreen *driScreen = (__GLXDRIscreen *) screen;

+    __GLXDRIconfig *config = (__GLXDRIconfig *) glxConfig;

+    __GLXDRIdrawable *private;

+

+    private = xcalloc(1, sizeof *private);

+    if (private == NULL)

+	return NULL;

+

+    private->screen = driScreen;

+    if (!__glXDrawableInit(&private->base, screen,

+			   pDraw, type, glxDrawId, glxConfig)) {

+        xfree(private);

+	return NULL;

+    }

+

+    private->base.destroy       = __glXDRIdrawableDestroy;

+    private->base.swapBuffers   = __glXDRIdrawableSwapBuffers;

+    private->base.copySubBuffer = __glXDRIdrawableCopySubBuffer;

+    private->base.waitGL	= __glXDRIdrawableWaitGL;

+    private->base.waitX		= __glXDRIdrawableWaitX;

+

+    if (DRI2CreateDrawable(client, pDraw, drawId)) {

+	    xfree(private);

+	    return NULL;

+    }

+

+    private->driDrawable =

+	(*driScreen->dri2->createNewDrawable)(driScreen->driScreen,

+					      config->driConfig, private);

+

+    return &private->base;

+}

+

+static __DRIbuffer *

+dri2GetBuffers(__DRIdrawable *driDrawable,

+	       int *width, int *height,

+	       unsigned int *attachments, int count,

+	       int *out_count, void *loaderPrivate)

+{

+    __GLXDRIdrawable *private = loaderPrivate;

+    DRI2BufferPtr *buffers;

+    int i;

+    int j;

+

+    buffers = DRI2GetBuffers(private->base.pDraw,

+			     width, height, attachments, count, out_count);

+    if (*out_count > MAX_DRAWABLE_BUFFERS) {

+	*out_count = 0;

+	return NULL;

+    }

+	

+    private->width = *width;

+    private->height = *height;

+

+    /* This assumes the DRI2 buffer attachment tokens matches the

+     * __DRIbuffer tokens. */

+    j = 0;

+    for (i = 0; i < *out_count; i++) {

+	/* Do not send the real front buffer of a window to the client.

+	 */

+	if ((private->base.pDraw->type == DRAWABLE_WINDOW)

+	    && (buffers[i]->attachment == DRI2BufferFrontLeft)) {

+	    continue;

+	}

+

+	private->buffers[j].attachment = buffers[i]->attachment;

+	private->buffers[j].name = buffers[i]->name;

+	private->buffers[j].pitch = buffers[i]->pitch;

+	private->buffers[j].cpp = buffers[i]->cpp;

+	private->buffers[j].flags = buffers[i]->flags;

+	j++;

+    }

+

+    *out_count = j;

+    return private->buffers;

+}

+

+static __DRIbuffer *

+dri2GetBuffersWithFormat(__DRIdrawable *driDrawable,

+			 int *width, int *height,

+			 unsigned int *attachments, int count,

+			 int *out_count, void *loaderPrivate)

+{

+    __GLXDRIdrawable *private = loaderPrivate;

+    DRI2BufferPtr *buffers;

+    int i;

+    int j = 0;

+

+    buffers = DRI2GetBuffersWithFormat(private->base.pDraw,

+				       width, height, attachments, count,

+				       out_count);

+    if (*out_count > MAX_DRAWABLE_BUFFERS) {

+	*out_count = 0;

+	return NULL;

+    }

+

+    private->width = *width;

+    private->height = *height;

+

+    /* This assumes the DRI2 buffer attachment tokens matches the

+     * __DRIbuffer tokens. */

+    for (i = 0; i < *out_count; i++) {

+	/* Do not send the real front buffer of a window to the client.

+	 */

+	if ((private->base.pDraw->type == DRAWABLE_WINDOW)

+	    && (buffers[i]->attachment == DRI2BufferFrontLeft)) {

+	    continue;

+	}

+

+	private->buffers[j].attachment = buffers[i]->attachment;

+	private->buffers[j].name = buffers[i]->name;

+	private->buffers[j].pitch = buffers[i]->pitch;

+	private->buffers[j].cpp = buffers[i]->cpp;

+	private->buffers[j].flags = buffers[i]->flags;

+	j++;

+    }

+

+    *out_count = j;

+    return private->buffers;

+}

+

+static void 

+dri2FlushFrontBuffer(__DRIdrawable *driDrawable, void *loaderPrivate)

+{

+    (void) driDrawable;

+    __glXDRIdrawableWaitGL((__GLXdrawable *) loaderPrivate);

+}

+

+static const __DRIdri2LoaderExtension loaderExtension = {

+    { __DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION },

+    dri2GetBuffers,

+    dri2FlushFrontBuffer,

+    dri2GetBuffersWithFormat,

+};

+

+static const __DRIextension *loader_extensions[] = {

+    &systemTimeExtension.base,

+    &loaderExtension.base,

+    NULL

+};

+

+static const char dri_driver_path[] = DRI_DRIVER_PATH;

+

+static Bool

+glxDRIEnterVT (int index, int flags)

+{

+    __GLXDRIscreen *screen = (__GLXDRIscreen *) 

+	glxGetScreen(screenInfo.screens[index]);

+

+    LogMessage(X_INFO, "AIGLX: Resuming AIGLX clients after VT switch\n");

+

+    if (!(*screen->enterVT) (index, flags))

+	return FALSE;

+    

+    glxResumeClients();

+

+    return TRUE;

+}

+

+static void

+glxDRILeaveVT (int index, int flags)

+{

+    __GLXDRIscreen *screen = (__GLXDRIscreen *)

+	glxGetScreen(screenInfo.screens[index]);

+

+    LogMessage(X_INFO, "AIGLX: Suspending AIGLX clients for VT switch\n");

+

+    glxSuspendClients();

+

+    return (*screen->leaveVT) (index, flags);

+}

+

+static void

+initializeExtensions(__GLXDRIscreen *screen)

+{

+    ScreenPtr pScreen = screen->base.pScreen;

+    const __DRIextension **extensions;

+    int i;

+

+    extensions = screen->core->getExtensions(screen->driScreen);

+

+    __glXEnableExtension(screen->glx_enable_bits,

+			 "GLX_MESA_copy_sub_buffer");

+    LogMessage(X_INFO, "AIGLX: enabled GLX_MESA_copy_sub_buffer\n");

+

+    __glXEnableExtension(screen->glx_enable_bits, "GLX_INTEL_swap_event");

+    LogMessage(X_INFO, "AIGLX: enabled GLX_INTEL_swap_event\n");

+

+    if (DRI2HasSwapControl(pScreen)) {

+	__glXEnableExtension(screen->glx_enable_bits,

+			     "GLX_SGI_swap_control");

+	__glXEnableExtension(screen->glx_enable_bits,

+			     "GLX_MESA_swap_control");

+	LogMessage(X_INFO, "AIGLX: enabled GLX_SGI_swap_control and GLX_MESA_swap_control\n");

+    }

+

+    for (i = 0; extensions[i]; i++) {

+#ifdef __DRI_READ_DRAWABLE

+	if (strcmp(extensions[i]->name, __DRI_READ_DRAWABLE) == 0) {

+	    __glXEnableExtension(screen->glx_enable_bits,

+				 "GLX_SGI_make_current_read");

+

+	    LogMessage(X_INFO, "AIGLX: enabled GLX_SGI_make_current_read\n");

+	}

+#endif

+

+#ifdef __DRI_TEX_BUFFER

+	if (strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0) {

+	    screen->texBuffer =

+		(const __DRItexBufferExtension *) extensions[i];

+	    /* GLX_EXT_texture_from_pixmap is always enabled. */

+	    LogMessage(X_INFO, "AIGLX: GLX_EXT_texture_from_pixmap backed by buffer objects\n");

+	}

+#endif

+

+#ifdef __DRI2_FLUSH

+	if (strcmp(extensions[i]->name, __DRI2_FLUSH) == 0 &&

+	    extensions[i]->version >= 3) {

+		screen->flush = (__DRI2flushExtension *) extensions[i];

+	}

+#endif

+

+	/* Ignore unknown extensions */

+    }

+}

+

+static __GLXscreen *

+__glXDRIscreenProbe(ScreenPtr pScreen)

+{

+    const char *driverName, *deviceName;

+    __GLXDRIscreen *screen;

+    char filename[128];

+    size_t buffer_size;

+    ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];

+    const __DRIextension **extensions;

+    const __DRIconfig **driConfigs;

+    int i;

+

+    screen = xcalloc(1, sizeof *screen);

+    if (screen == NULL)

+	return NULL;

+

+    if (!xf86LoaderCheckSymbol("DRI2Connect") ||

+	!DRI2Connect(pScreen, DRI2DriverDRI,

+		     &screen->fd, &driverName, &deviceName)) {

+	LogMessage(X_INFO,

+		   "AIGLX: Screen %d is not DRI2 capable\n", pScreen->myNum);

+	return NULL;

+    }

+

+    screen->base.destroy        = __glXDRIscreenDestroy;

+    screen->base.createContext  = __glXDRIscreenCreateContext;

+    screen->base.createDrawable = __glXDRIscreenCreateDrawable;

+    screen->base.swapInterval   = __glXDRIdrawableSwapInterval;

+    screen->base.pScreen       = pScreen;

+

+    __glXInitExtensionEnableBits(screen->glx_enable_bits);

+

+    snprintf(filename, sizeof filename,

+	     "%s/%s_dri.so", dri_driver_path, driverName);

+

+    screen->driver = dlopen(filename, RTLD_LAZY | RTLD_LOCAL);

+    if (screen->driver == NULL) {

+	LogMessage(X_ERROR, "AIGLX error: dlopen of %s failed (%s)\n",

+		   filename, dlerror());

+        goto handle_error;

+    }

+

+    extensions = dlsym(screen->driver, __DRI_DRIVER_EXTENSIONS);

+    if (extensions == NULL) {

+	LogMessage(X_ERROR, "AIGLX error: %s exports no extensions (%s)\n",

+		   driverName, dlerror());

+	goto handle_error;

+    }

+    

+    for (i = 0; extensions[i]; i++) {

+        if (strcmp(extensions[i]->name, __DRI_CORE) == 0 &&

+	    extensions[i]->version >= 1) {

+		screen->core = (const __DRIcoreExtension *) extensions[i];

+	}

+        if (strcmp(extensions[i]->name, __DRI_DRI2) == 0 &&

+	    extensions[i]->version >= 1) {

+		screen->dri2 = (const __DRIdri2Extension *) extensions[i];

+	}

+    }

+

+    if (screen->core == NULL || screen->dri2 == NULL) {

+	LogMessage(X_ERROR, "AIGLX error: %s exports no DRI extension\n",

+		   driverName);

+	goto handle_error;

+    }

+

+    screen->driScreen =

+	(*screen->dri2->createNewScreen)(pScreen->myNum,

+					 screen->fd,

+					 loader_extensions,

+					 &driConfigs,

+					 screen);

+

+    if (screen->driScreen == NULL) {

+	LogMessage(X_ERROR,

+		   "AIGLX error: Calling driver entry point failed\n");

+	goto handle_error;

+    }

+

+    initializeExtensions(screen);

+

+    screen->base.fbconfigs = glxConvertConfigs(screen->core, driConfigs,

+					       GLX_WINDOW_BIT |

+					       GLX_PIXMAP_BIT |

+					       GLX_PBUFFER_BIT);

+

+    __glXScreenInit(&screen->base, pScreen);

+

+    /* The first call simply determines the length of the extension string.

+     * This allows us to allocate some memory to hold the extension string,

+     * but it requires that we call __glXGetExtensionString a second time.

+     */

+    buffer_size = __glXGetExtensionString(screen->glx_enable_bits, NULL);

+    if (buffer_size > 0) {

+	if (screen->base.GLXextensions != NULL) {

+	    xfree(screen->base.GLXextensions);

+	}

+

+	screen->base.GLXextensions = xnfalloc(buffer_size);

+	(void) __glXGetExtensionString(screen->glx_enable_bits, 

+				       screen->base.GLXextensions);

+    }

+

+    /* We're going to assume (perhaps incorrectly?) that all DRI2-enabled

+     * drivers support the required extensions for GLX 1.4.  The extensions

+     * we're assuming are:

+     *

+     *    - GLX_SGI_make_current_read (1.3)

+     *    - GLX_SGIX_fbconfig (1.3)

+     *    - GLX_SGIX_pbuffer (1.3)

+     *    - GLX_ARB_multisample (1.4)

+     */

+    screen->base.GLXmajor = 1;

+    screen->base.GLXminor = 4;

+    

+    screen->enterVT = pScrn->EnterVT;

+    pScrn->EnterVT = glxDRIEnterVT; 

+    screen->leaveVT = pScrn->LeaveVT;

+    pScrn->LeaveVT = glxDRILeaveVT;

+

+    LogMessage(X_INFO,

+	       "AIGLX: Loaded and initialized %s\n", filename);

+

+    return &screen->base;

+

+ handle_error:

+    if (screen->driver)

+        dlclose(screen->driver);

+

+    xfree(screen);

+

+    LogMessage(X_ERROR, "AIGLX: reverting to software rendering\n");

+

+    return NULL;

+}

+

+_X_EXPORT __GLXprovider __glXDRI2Provider = {

+    __glXDRIscreenProbe,

+    "DRI2",

+    NULL

+};