Move GL/glx on level up now that it's the only thing left under GL.

1 files changed, 1156 insertions, 0 deletions

diff --git a/glx/glxdri.c b/glx/glxdri.c
new file mode 100644
index 000000000..43b0523f3
--- /dev/null
+++ b/glx/glxdri.c
@@ -0,0 +1,1156 @@
+/*
+ * Copyright © 2006 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 <sys/time.h>
+#include <dlfcn.h>
+
+#include <drm.h>
+#include <GL/gl.h>
+#include <GL/internal/dri_interface.h>
+
+#include <windowstr.h>
+#include <os.h>
+
+#define _XF86DRI_SERVER_
+#include <drm_sarea.h>
+#include <xf86drm.h>
+#include <xf86dristr.h>
+#include <xf86str.h>
+#include <xf86.h>
+#include <dri.h>
+
+#include "servermd.h"
+
+#define DRI_NEW_INTERFACE_ONLY
+#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;
+
+    xf86EnterVTProc	*enterVT;
+    xf86LeaveVTProc	*leaveVT;
+
+    const __DRIcoreExtension *core;
+    const __DRIlegacyExtension *legacy;
+    const __DRIcopySubBufferExtension *copySubBuffer;
+    const __DRIswapControlExtension *swapControl;
+
+#ifdef __DRI_TEX_OFFSET
+    const __DRItexOffsetExtension *texOffset;
+    DRITexOffsetStartProcPtr texOffsetStart;
+    DRITexOffsetFinishProcPtr texOffsetFinish;
+    __GLXDRIdrawable *texOffsetOverride[16];
+    GLuint lastTexOffsetOverride;
+#endif
+
+    unsigned char glx_enable_bits[__GLX_EXT_BYTES];
+};
+
+struct __GLXDRIcontext {
+    __GLXcontext base;
+    __DRIcontext *driContext;
+    XID hwContextID;
+};
+
+struct __GLXDRIdrawable {
+    __GLXdrawable base;
+    __DRIdrawable *driDrawable;
+
+    /* Pulled in from old __GLXpixmap */
+#ifdef __DRI_TEX_OFFSET
+    GLint texname;
+    __GLXDRIcontext *ctx;
+    unsigned long offset;
+    DamagePtr pDamage;
+#endif
+};
+
+static void
+__glXDRIleaveServer(GLboolean rendering)
+{
+    int i;
+
+    for (i = 0; rendering && i < screenInfo.numScreens; i++) {
+	__GLXDRIscreen * const screen =
+	    (__GLXDRIscreen *) glxGetScreen(screenInfo.screens[i]);
+	GLuint lastOverride = screen->lastTexOffsetOverride;
+
+	if (lastOverride) {
+	    __GLXDRIdrawable **texOffsetOverride = screen->texOffsetOverride;
+	    int j;
+
+	    for (j = 0; j < lastOverride; j++) {
+		__GLXDRIdrawable *pGlxPix = texOffsetOverride[j];
+
+		if (pGlxPix && pGlxPix->texname) {
+		    pGlxPix->offset =
+			screen->texOffsetStart((PixmapPtr)pGlxPix->base.pDraw);
+		}
+	    }
+	}
+    }
+
+    DRIBlockHandler(NULL, NULL, NULL);
+
+    for (i = 0; rendering && i < screenInfo.numScreens; i++) {
+	__GLXDRIscreen * const screen =
+	    (__GLXDRIscreen *) glxGetScreen(screenInfo.screens[i]);
+	GLuint lastOverride = screen->lastTexOffsetOverride;
+
+	if (lastOverride) {
+	    __GLXDRIdrawable **texOffsetOverride = screen->texOffsetOverride;
+	    int j;
+
+	    for (j = 0; j < lastOverride; j++) {
+		__GLXDRIdrawable *pGlxPix = texOffsetOverride[j];
+
+		if (pGlxPix && pGlxPix->texname) {
+		    screen->texOffset->setTexOffset(pGlxPix->ctx->driContext,
+						    pGlxPix->texname,
+						    pGlxPix->offset,
+						    pGlxPix->base.pDraw->depth,
+						    ((PixmapPtr)pGlxPix->base.pDraw)->devKind);
+		}
+	    }
+	}
+    }
+}
+    
+static void
+__glXDRIenterServer(GLboolean rendering)
+{
+    int i;
+
+    for (i = 0; rendering && i < screenInfo.numScreens; i++) {
+	__GLXDRIscreen * const screen = (__GLXDRIscreen *)
+	    glxGetScreen(screenInfo.screens[i]);
+
+	if (screen->lastTexOffsetOverride) {
+	    CALL_Flush(GET_DISPATCH(), ());
+	    break;
+	}
+    }
+
+    DRIWakeupHandler(NULL, 0, NULL);
+}
+
+
+static void
+__glXDRIdoReleaseTexImage(__GLXDRIscreen *screen, __GLXDRIdrawable *drawable)
+{
+    GLuint lastOverride = screen->lastTexOffsetOverride;
+
+    if (lastOverride) {
+	__GLXDRIdrawable **texOffsetOverride = screen->texOffsetOverride;
+	int i;
+
+	for (i = 0; i < lastOverride; i++) {
+	    if (texOffsetOverride[i] == drawable) {
+
+		texOffsetOverride[i] = NULL;
+
+		if (i + 1 == lastOverride) {
+		    lastOverride = 0;
+
+		    while (i--) {
+			if (texOffsetOverride[i]) {
+			    lastOverride = i + 1;
+			    break;
+			}
+		    }
+
+		    screen->lastTexOffsetOverride = lastOverride;
+
+		    break;
+		}
+	    }
+	}
+    }
+}
+
+
+static void
+__glXDRIdrawableDestroy(__GLXdrawable *drawable)
+{
+    __GLXDRIdrawable *private = (__GLXDRIdrawable *) drawable;
+    __GLXDRIscreen *screen;
+    int i;
+
+    for (i = 0; i < screenInfo.numScreens; i++) {
+	screen = (__GLXDRIscreen *) glxGetScreen(screenInfo.screens[i]);
+	__glXDRIdoReleaseTexImage(screen, private);
+    }
+
+    /* If the X window was destroyed, the dri DestroyWindow hook will
+     * aready have taken care of this, so only call if pDraw isn't NULL. */
+    if (drawable->pDraw != NULL) {
+	screen = (__GLXDRIscreen *) glxGetScreen(drawable->pDraw->pScreen);
+	(*screen->core->destroyDrawable)(private->driDrawable);
+
+	__glXenterServer(GL_FALSE);
+	DRIDestroyDrawable(drawable->pDraw->pScreen,
+			   serverClient, drawable->pDraw);
+	__glXleaveServer(GL_FALSE);
+    }
+
+    xfree(private);
+}
+
+static GLboolean
+__glXDRIdrawableResize(__GLXdrawable *glxPriv)
+{
+    /* Nothing to do here, the DRI driver asks the server for drawable
+     * geometry when it sess the SAREA timestamps change.*/
+
+    return GL_TRUE;
+}
+
+static GLboolean
+__glXDRIdrawableSwapBuffers(__GLXdrawable *basePrivate)
+{
+    __GLXDRIdrawable *private = (__GLXDRIdrawable *) basePrivate;
+    __GLXDRIscreen *screen =
+	(__GLXDRIscreen *) glxGetScreen(basePrivate->pDraw->pScreen);
+
+    (*screen->core->swapBuffers)(private->driDrawable);
+
+    return TRUE;
+}
+
+
+static int
+__glXDRIdrawableSwapInterval(__GLXdrawable *baseDrawable, int interval)
+{
+    __GLXDRIdrawable *draw = (__GLXDRIdrawable *) baseDrawable;
+    __GLXDRIscreen *screen =
+	(__GLXDRIscreen *) glxGetScreen(baseDrawable->pDraw->pScreen);
+
+    if (screen->swapControl)
+	screen->swapControl->setSwapInterval(draw->driDrawable, interval);
+
+    return 0;
+}
+
+
+static void
+__glXDRIdrawableCopySubBuffer(__GLXdrawable *basePrivate,
+			       int x, int y, int w, int h)
+{
+    __GLXDRIdrawable *private = (__GLXDRIdrawable *) basePrivate;
+    __GLXDRIscreen *screen = (__GLXDRIscreen *)
+	glxGetScreen(basePrivate->pDraw->pScreen);
+
+    if (screen->copySubBuffer)
+	screen->copySubBuffer->copySubBuffer(private->driDrawable, x, y, w, h);
+}
+
+static void
+__glXDRIcontextDestroy(__GLXcontext *baseContext)
+{
+    __GLXDRIcontext *context = (__GLXDRIcontext *) baseContext;
+    __GLXDRIscreen *screen = (__GLXDRIscreen *) context->base.pGlxScreen;
+    Bool retval;
+
+    screen->core->destroyContext(context->driContext);
+
+    __glXenterServer(GL_FALSE);
+    retval = DRIDestroyContext(baseContext->pGlxScreen->pScreen,
+			       context->hwContextID);
+    __glXleaveServer(GL_FALSE);
+
+    __glXContextDestroy(&context->base);
+    xfree(context);
+}
+
+static int
+__glXDRIcontextMakeCurrent(__GLXcontext *baseContext)
+{
+    __GLXDRIcontext *context = (__GLXDRIcontext *) baseContext;
+    __GLXDRIscreen *screen = (__GLXDRIscreen *) context->base.pGlxScreen;
+    __GLXDRIdrawable *draw = (__GLXDRIdrawable *) baseContext->drawPriv;
+    __GLXDRIdrawable *read = (__GLXDRIdrawable *) baseContext->readPriv;
+
+    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 void
+glxFillAlphaChannel (CARD32 *pixels, CARD32 rowstride, int width, int height)
+{
+    int i;
+    CARD32 *p, *end;
+
+    rowstride /= 4;
+    
+    for (i = 0; i < height; i++)
+    {
+	p = pixels;
+	end = p + width;
+	while (p < end)
+	  *p++ |= 0xFF000000;
+	pixels += rowstride;
+    }
+}
+
+/*
+ * (sticking this here for lack of a better place)
+ * Known issues with the GLX_EXT_texture_from_pixmap implementation:
+ * - In general we ignore the fbconfig, lots of examples follow
+ * - No fbconfig handling for multiple mipmap levels
+ * - No fbconfig handling for 1D textures
+ * - No fbconfig handling for TEXTURE_TARGET
+ * - No fbconfig exposure of Y inversion state
+ * - No GenerateMipmapEXT support (due to no FBO support)
+ * - No support for anything but 16bpp and 32bpp-sparse pixmaps
+ */
+
+static int
+__glXDRIbindTexImage(__GLXcontext *baseContext,
+		     int buffer,
+		     __GLXdrawable *glxPixmap)
+{
+    RegionPtr	pRegion = NULL;
+    PixmapPtr	pixmap;
+    int		bpp, override = 0, texname;
+    GLenum	format, type;
+    ScreenPtr pScreen = glxPixmap->pDraw->pScreen;
+    __GLXDRIdrawable *driDraw = (__GLXDRIdrawable *) glxPixmap;
+    __GLXDRIscreen * const screen = (__GLXDRIscreen *) glxGetScreen(pScreen);
+
+    CALL_GetIntegerv(GET_DISPATCH(), (glxPixmap->target == GL_TEXTURE_2D ?
+				      GL_TEXTURE_BINDING_2D :
+				      GL_TEXTURE_BINDING_RECTANGLE_NV,
+				      &texname));
+
+    if (!texname)
+	return __glXError(GLXBadContextState);
+
+    pixmap = (PixmapPtr) glxPixmap->pDraw;
+
+    if (screen->texOffsetStart && screen->texOffset) {
+	__GLXDRIdrawable **texOffsetOverride = screen->texOffsetOverride;
+	int i, firstEmpty = 16;
+
+	for (i = 0; i < 16; i++) {
+	    if (texOffsetOverride[i] == driDraw)
+		goto alreadyin; 
+
+	    if (firstEmpty == 16 && !texOffsetOverride[i])
+		firstEmpty = i;
+	}
+
+	if (firstEmpty == 16) {
+	    ErrorF("%s: Failed to register texture offset override\n", __func__);
+	    goto nooverride;
+	}
+
+	if (firstEmpty >= screen->lastTexOffsetOverride)
+	    screen->lastTexOffsetOverride = firstEmpty + 1;
+
+	texOffsetOverride[firstEmpty] = driDraw;
+
+alreadyin:
+	override = 1;
+
+	driDraw->ctx = (__GLXDRIcontext*)baseContext;
+
+	if (texname == driDraw->texname)
+	    return Success;
+
+	driDraw->texname = texname;
+
+	screen->texOffset->setTexOffset(driDraw->ctx->driContext, texname, 0,
+					pixmap->drawable.depth,
+					pixmap->devKind);
+    }
+nooverride:
+
+    if (!driDraw->pDamage) {
+	if (!override) {
+	    driDraw->pDamage = DamageCreate(NULL, NULL, DamageReportNone,
+					    TRUE, pScreen, NULL);
+	    if (!driDraw->pDamage)
+		return BadAlloc;
+
+	    DamageRegister ((DrawablePtr) pixmap, driDraw->pDamage);
+	}
+
+	pRegion = NULL;
+    } else {
+	pRegion = DamageRegion(driDraw->pDamage);
+	if (REGION_NIL(pRegion))
+	    return Success;
+    }
+
+    /* XXX 24bpp packed, 8, etc */
+    if (pixmap->drawable.depth >= 24) {
+	bpp = 4;
+	format = GL_BGRA;
+	type =
+#if X_BYTE_ORDER == X_BIG_ENDIAN
+	    !override ? GL_UNSIGNED_INT_8_8_8_8_REV :
+#endif
+	    GL_UNSIGNED_BYTE;
+    } else {
+	bpp = 2;
+	format = GL_RGB;
+	type = GL_UNSIGNED_SHORT_5_6_5;
+    }
+
+    if (pRegion == NULL)
+    {
+	void *data = NULL;
+
+	if (!override) {
+	    unsigned pitch = PixmapBytePad(pixmap->drawable.width,
+					   pixmap->drawable.depth); 
+
+	    data = xalloc(pitch * pixmap->drawable.height);
+
+	    pScreen->GetImage(&pixmap->drawable, 0 /*pixmap->drawable.x*/,
+			      0 /*pixmap->drawable.y*/, pixmap->drawable.width,
+			      pixmap->drawable.height, ZPixmap, ~0, data);
+
+	    if (pixmap->drawable.depth == 24)
+		glxFillAlphaChannel(data,
+				    pitch,
+				    pixmap->drawable.width,
+				    pixmap->drawable.height);
+
+	    CALL_PixelStorei( GET_DISPATCH(), (GL_UNPACK_ROW_LENGTH,
+					       pitch / bpp) );
+	    CALL_PixelStorei( GET_DISPATCH(), (GL_UNPACK_SKIP_PIXELS, 0) );
+	    CALL_PixelStorei( GET_DISPATCH(), (GL_UNPACK_SKIP_ROWS, 0) );
+	}
+
+	CALL_TexImage2D( GET_DISPATCH(),
+			 (glxPixmap->target,
+			  0,
+			  bpp == 4 ? 4 : 3,
+			  pixmap->drawable.width,
+			  pixmap->drawable.height,
+			  0,
+			  format,
+			  type,
+			  data) );
+
+	xfree(data);
+    } else if (!override) {
+        int i, numRects;
+	BoxPtr p;
+
+	numRects = REGION_NUM_RECTS (pRegion);
+	p = REGION_RECTS (pRegion);
+
+	CALL_PixelStorei( GET_DISPATCH(), (GL_UNPACK_SKIP_PIXELS, 0) );
+	CALL_PixelStorei( GET_DISPATCH(), (GL_UNPACK_SKIP_ROWS, 0) );
+
+	for (i = 0; i < numRects; i++)
+	{
+	    unsigned pitch = PixmapBytePad(p[i].x2 - p[i].x1,
+					   pixmap->drawable.depth);
+	    void *data = xalloc(pitch * (p[i].y2 - p[i].y1));
+
+	    pScreen->GetImage(&pixmap->drawable, /*pixmap->drawable.x +*/ p[i].x1,
+			      /*pixmap->drawable.y*/ + p[i].y1, p[i].x2 - p[i].x1,
+			      p[i].y2 - p[i].y1, ZPixmap, ~0, data);
+
+	    if (pixmap->drawable.depth == 24)
+		glxFillAlphaChannel(data,
+				    pitch,
+				    p[i].x2 - p[i].x1,
+				    p[i].y2 - p[i].y1);
+
+	    CALL_PixelStorei( GET_DISPATCH(), (GL_UNPACK_ROW_LENGTH,
+					       pitch / bpp) );
+
+	    CALL_TexSubImage2D( GET_DISPATCH(),
+				(glxPixmap->target,
+				 0,
+				 p[i].x1, p[i].y1,
+				 p[i].x2 - p[i].x1, p[i].y2 - p[i].y1,
+				 format,
+				 type,
+				 data) );
+
+	    xfree(data);
+	}
+    }
+
+    if (!override)
+	DamageEmpty(driDraw->pDamage);
+
+    return Success;
+}
+
+static int
+__glXDRIreleaseTexImage(__GLXcontext *baseContext,
+			int buffer,
+			__GLXdrawable *pixmap)
+{
+    __GLXDRIscreen *screen =
+	(__GLXDRIscreen *) glxGetScreen(pixmap->pDraw->pScreen);
+    __GLXDRIdrawable *drawable = (__GLXDRIdrawable *) pixmap;
+
+    __glXDRIdoReleaseTexImage(screen, drawable);
+
+    return Success;
+}
+
+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;
+    VisualPtr visual;
+    int i;
+    GLboolean retval;
+    __DRIcontext *driShare;
+    drm_context_t hwContext;
+    ScreenPtr pScreen = baseScreen->pScreen;
+
+    shareContext = (__GLXDRIcontext *) baseShareContext;
+    if (shareContext)
+	driShare = shareContext->driContext;
+    else
+	driShare = NULL;
+
+    if (baseShareContext && baseShareContext->isDirect)
+        return NULL;
+
+    context = xalloc(sizeof *context);
+    if (context == NULL)
+	return NULL;
+
+    memset(context, 0, sizeof *context);
+    context->base.destroy           = __glXDRIcontextDestroy;
+    context->base.makeCurrent       = __glXDRIcontextMakeCurrent;
+    context->base.loseCurrent       = __glXDRIcontextLoseCurrent;
+    context->base.copy              = __glXDRIcontextCopy;
+    context->base.forceCurrent      = __glXDRIcontextForceCurrent;
+
+    context->base.textureFromPixmap = &__glXDRItextureFromPixmap;
+    /* Find the requested X visual */
+    visual = pScreen->visuals;
+    for (i = 0; i < pScreen->numVisuals; i++, visual++)
+	if (visual->vid == glxConfig->visualID)
+	    break;
+    if (i == pScreen->numVisuals)
+	return GL_FALSE;
+
+    context->hwContextID = FakeClientID(0);
+
+    __glXenterServer(GL_FALSE);
+    retval = DRICreateContext(baseScreen->pScreen, visual,
+			      context->hwContextID, &hwContext);
+    __glXleaveServer(GL_FALSE);
+
+    context->driContext =
+	screen->legacy->createNewContext(screen->driScreen,
+					 config->driConfig,
+					 0, /* render type */
+					 driShare,
+					 hwContext,
+					 context);
+
+    if (context->driContext == NULL) {
+    	__glXenterServer(GL_FALSE);
+	retval = DRIDestroyContext(baseScreen->pScreen, context->hwContextID);
+    	__glXleaveServer(GL_FALSE);
+	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;
+    GLboolean retval;
+    drm_drawable_t hwDrawable;
+
+    private = xalloc(sizeof *private);
+    if (private == NULL)
+	return NULL;
+
+    memset(private, 0, sizeof *private);
+
+    if (!__glXDrawableInit(&private->base, screen,
+			   pDraw, type, drawId, glxConfig)) {
+        xfree(private);
+	return NULL;
+    }
+
+    private->base.destroy       = __glXDRIdrawableDestroy;
+    private->base.resize        = __glXDRIdrawableResize;
+    private->base.swapBuffers   = __glXDRIdrawableSwapBuffers;
+    private->base.copySubBuffer = __glXDRIdrawableCopySubBuffer;
+
+    __glXenterServer(GL_FALSE);
+    retval = DRICreateDrawable(screen->pScreen, serverClient,
+			       pDraw, &hwDrawable);
+    __glXleaveServer(GL_FALSE);
+
+    /* The last argument is 'attrs', which is used with pbuffers which
+     * we currently don't support. */
+
+    private->driDrawable =
+	(driScreen->legacy->createNewDrawable)(driScreen->driScreen,
+					       config->driConfig,
+					       hwDrawable, 0, NULL, private);
+
+    if (private->driDrawable == NULL) {
+	__glXenterServer(GL_FALSE);
+	DRIDestroyDrawable(screen->pScreen, serverClient, pDraw);
+	__glXleaveServer(GL_FALSE);
+	xfree(private);
+	return NULL;
+    }
+
+    return &private->base;
+}
+
+static GLboolean
+getDrawableInfo(__DRIdrawable *driDrawable,
+		unsigned int *index, unsigned int *stamp,
+		int *x, int *y, int *width, int *height,
+		int *numClipRects, drm_clip_rect_t **ppClipRects,
+		int *backX, int *backY,
+		int *numBackClipRects, drm_clip_rect_t **ppBackClipRects,
+		void *data)
+{
+    __GLXDRIdrawable *drawable = data;
+    ScreenPtr pScreen;
+    drm_clip_rect_t *pClipRects, *pBackClipRects;
+    GLboolean retval;
+    size_t size;
+
+    /* If the X window has been destroyed, give up here. */
+    if (drawable->base.pDraw == NULL)
+	return GL_FALSE;
+
+    pScreen = drawable->base.pDraw->pScreen;
+    __glXenterServer(GL_FALSE);
+    retval = DRIGetDrawableInfo(pScreen, drawable->base.pDraw, index, stamp,
+				x, y, width, height,
+				numClipRects, &pClipRects,
+				backX, backY,
+				numBackClipRects, &pBackClipRects);
+    __glXleaveServer(GL_FALSE);
+
+    if (*numClipRects > 0) {
+	size = sizeof (drm_clip_rect_t) * *numClipRects;
+	*ppClipRects = xalloc (size);
+
+	/* Clip cliprects to screen dimensions (redirected windows) */
+	if (*ppClipRects != NULL) {
+	    int i, j;
+
+	    for (i = 0, j = 0; i < *numClipRects; i++) {
+	        (*ppClipRects)[j].x1 = max(pClipRects[i].x1, 0);
+		(*ppClipRects)[j].y1 = max(pClipRects[i].y1, 0);
+		(*ppClipRects)[j].x2 = min(pClipRects[i].x2, pScreen->width);
+		(*ppClipRects)[j].y2 = min(pClipRects[i].y2, pScreen->height);
+
+		if ((*ppClipRects)[j].x1 < (*ppClipRects)[j].x2 &&
+		    (*ppClipRects)[j].y1 < (*ppClipRects)[j].y2) {
+		    j++;
+		}
+	    }
+
+	    if (*numClipRects != j) {
+		*numClipRects = j;
+		*ppClipRects = xrealloc (*ppClipRects,
+					 sizeof (drm_clip_rect_t) *
+					 *numClipRects);
+	    }
+	} else
+	    *numClipRects = 0;
+    }
+    else {
+      *ppClipRects = NULL;
+    }
+      
+    if (*numBackClipRects > 0) {
+	size = sizeof (drm_clip_rect_t) * *numBackClipRects;
+	*ppBackClipRects = xalloc (size);
+	if (*ppBackClipRects != NULL)
+	    memcpy (*ppBackClipRects, pBackClipRects, size);
+    }
+    else {
+      *ppBackClipRects = NULL;
+    }
+
+    return retval;
+}
+
+static void __glXReportDamage(__DRIdrawable *driDraw,
+			      int x, int y,
+			      drm_clip_rect_t *rects, int num_rects,
+			      GLboolean front_buffer,
+			      void *data)
+{
+    __GLXDRIdrawable *drawable = data;
+    DrawablePtr pDraw = drawable->base.pDraw;
+    RegionRec region;
+
+    __glXenterServer(GL_FALSE);
+
+    REGION_INIT(pDraw->pScreen, &region, (BoxPtr) rects, num_rects);
+    REGION_TRANSLATE(pScreen, &region, pDraw->x, pDraw->y);
+    DamageDamageRegion(pDraw, &region);
+    REGION_UNINIT(pDraw->pScreen, &region);
+
+    __glXleaveServer(GL_FALSE);
+}
+
+static const __DRIgetDrawableInfoExtension getDrawableInfoExtension = {
+    { __DRI_GET_DRAWABLE_INFO, __DRI_GET_DRAWABLE_INFO_VERSION },
+    getDrawableInfo
+};
+
+static const __DRIdamageExtension damageExtension = {
+    { __DRI_DAMAGE, __DRI_DAMAGE_VERSION },
+    __glXReportDamage,
+};
+
+static const __DRIextension *loader_extensions[] = {
+    &systemTimeExtension.base,
+    &getDrawableInfoExtension.base,
+    &damageExtension.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)
+{
+    const __DRIextension **extensions;
+    int i;
+
+    extensions = screen->core->getExtensions(screen->driScreen);
+
+    for (i = 0; extensions[i]; i++) {
+#ifdef __DRI_COPY_SUB_BUFFER
+	if (strcmp(extensions[i]->name, __DRI_COPY_SUB_BUFFER) == 0) {
+	    screen->copySubBuffer = (__DRIcopySubBufferExtension *) extensions[i];
+	    __glXEnableExtension(screen->glx_enable_bits,
+				 "GLX_MESA_copy_sub_buffer");
+	    
+	    LogMessage(X_INFO, "AIGLX: enabled GLX_MESA_copy_sub_buffer\n");
+	}
+#endif
+
+#ifdef __DRI_SWAP_CONTROL
+	if (strcmp(extensions[i]->name, __DRI_SWAP_CONTROL) == 0) {
+	    screen->swapControl = (__DRIswapControlExtension *) extensions[i];
+	    __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");
+	}
+#endif
+
+#ifdef __DRI_TEX_OFFSET
+	if (strcmp(extensions[i]->name, __DRI_TEX_OFFSET) == 0) {
+	    screen->texOffset = (__DRItexOffsetExtension *) extensions[i];
+	    LogMessage(X_INFO, "AIGLX: enabled GLX_texture_from_pixmap with driver support\n");
+	}
+#endif
+	/* Ignore unknown extensions */
+    }
+}
+    
+extern __GLXconfig *
+glxConvertConfigs(const __DRIcoreExtension *core, const __DRIconfig **configs);
+
+static __GLXscreen *
+__glXDRIscreenProbe(ScreenPtr pScreen)
+{
+    drm_handle_t hSAREA;
+    drmAddress pSAREA = NULL;
+    char *BusID;
+    __DRIversion   ddx_version;
+    __DRIversion   dri_version;
+    __DRIversion   drm_version;
+    __DRIframebuffer  framebuffer;
+    int   fd = -1;
+    int   status;
+    drm_magic_t magic;
+    drmVersionPtr version;
+    int newlyopened;
+    char *driverName;
+    drm_handle_t  hFB;
+    int        junk;
+    __GLXDRIscreen *screen;
+    char filename[128];
+    Bool isCapable;
+    size_t buffer_size;
+    ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
+    const __DRIconfig **driConfigs;
+    const __DRIextension **extensions;
+    int i;
+
+    if (!xf86LoaderCheckSymbol("DRIQueryDirectRenderingCapable") ||
+	!DRIQueryDirectRenderingCapable(pScreen, &isCapable) ||
+	!isCapable) {
+	LogMessage(X_INFO,
+		   "AIGLX: Screen %d is not DRI capable\n", pScreen->myNum);
+	return NULL;
+    }
+
+    screen = xalloc(sizeof *screen);
+    if (screen == NULL)
+      return NULL;
+    memset(screen, 0, sizeof *screen);
+
+    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);
+
+    /* DRI protocol version. */
+    dri_version.major = XF86DRI_MAJOR_VERSION;
+    dri_version.minor = XF86DRI_MINOR_VERSION;
+    dri_version.patch = XF86DRI_PATCH_VERSION;
+
+    if (!DRIOpenConnection(pScreen, &hSAREA, &BusID)) {
+	LogMessage(X_ERROR, "AIGLX error: DRIOpenConnection failed\n");
+	goto handle_error;
+    }
+
+    fd = drmOpenOnce(NULL, BusID, &newlyopened);
+
+    if (fd < 0) {
+	LogMessage(X_ERROR, "AIGLX error: drmOpenOnce failed (%s)\n",
+		   strerror(-fd));
+	goto handle_error;
+    }
+
+    if (drmGetMagic(fd, &magic)) {
+	LogMessage(X_ERROR, "AIGLX error: drmGetMagic failed\n");
+	goto handle_error;
+    }
+
+    version = drmGetVersion(fd);
+    if (version) {
+	drm_version.major = version->version_major;
+	drm_version.minor = version->version_minor;
+	drm_version.patch = version->version_patchlevel;
+	drmFreeVersion(version);
+    }
+    else {
+	drm_version.major = -1;
+	drm_version.minor = -1;
+	drm_version.patch = -1;
+    }
+
+    if (newlyopened && !DRIAuthConnection(pScreen, magic)) {
+	LogMessage(X_ERROR, "AIGLX error: DRIAuthConnection failed\n");
+	goto handle_error;
+    }
+
+    /* Get device name (like "tdfx") and the ddx version numbers.
+     * We'll check the version in each DRI driver's "createNewScreen"
+     * function. */
+    if (!DRIGetClientDriverName(pScreen,
+				&ddx_version.major,
+				&ddx_version.minor,
+				&ddx_version.patch,
+				&driverName)) {
+	LogMessage(X_ERROR, "AIGLX error: DRIGetClientDriverName failed\n");
+	goto handle_error;
+    }
+
+    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 = (__DRIcoreExtension *) extensions[i];
+	}
+
+	if (strcmp(extensions[i]->name, __DRI_LEGACY) == 0 &&
+	    extensions[i]->version >= __DRI_LEGACY_VERSION) {
+		screen->legacy = (__DRIlegacyExtension *) extensions[i];
+	}
+    }
+
+    if (screen->core == NULL || screen->legacy == NULL) {
+	LogMessage(X_ERROR,
+		   "AIGLX error: %s does not export required DRI extension\n",
+		   driverName);
+	goto handle_error;
+    }
+
+    /*
+     * Get device-specific info.  pDevPriv will point to a struct
+     * (such as DRIRADEONRec in xfree86/driver/ati/radeon_dri.h) that
+     * has information about the screen size, depth, pitch, ancilliary
+     * buffers, DRM mmap handles, etc.
+     */
+    if (!DRIGetDeviceInfo(pScreen, &hFB, &junk,
+			  &framebuffer.size, &framebuffer.stride,
+			  &framebuffer.dev_priv_size, &framebuffer.dev_priv)) {
+	LogMessage(X_ERROR, "AIGLX error: XF86DRIGetDeviceInfo failed");
+	goto handle_error;
+    }
+
+    framebuffer.width = pScreen->width;
+    framebuffer.height = pScreen->height;
+
+    /* Map the framebuffer region. */
+    status = drmMap(fd, hFB, framebuffer.size, 
+		    (drmAddressPtr)&framebuffer.base);
+    if (status != 0) {
+	LogMessage(X_ERROR, "AIGLX error: drmMap of framebuffer failed (%s)",
+		   strerror(-status));
+	goto handle_error;
+    }
+
+    /* Map the SAREA region.  Further mmap regions may be setup in
+     * each DRI driver's "createNewScreen" function.
+     */
+    status = drmMap(fd, hSAREA, SAREA_MAX, &pSAREA);
+    if (status != 0) {
+	LogMessage(X_ERROR, "AIGLX error: drmMap of SAREA failed (%s)",
+		   strerror(-status));
+	goto handle_error;
+    }
+    
+    screen->driScreen =
+	(*screen->legacy->createNewScreen)(pScreen->myNum,
+					   &ddx_version,
+					   &dri_version,
+					   &drm_version,
+					   &framebuffer,
+					   pSAREA,
+					   fd,
+					   loader_extensions,
+					   &driConfigs,
+					   screen);
+
+    if (screen->driScreen == NULL) {
+	LogMessage(X_ERROR, "AIGLX error: Calling driver entry point failed");
+	goto handle_error;
+    }
+
+    screen->base.fbconfigs = glxConvertConfigs(screen->core, driConfigs);
+
+    initializeExtensions(screen);
+
+    DRIGetTexOffsetFuncs(pScreen, &screen->texOffsetStart,
+			 &screen->texOffsetFinish);
+
+    __glXScreenInit(&screen->base, pScreen);
+
+    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);
+    }
+
+    __glXsetEnterLeaveServerFuncs(__glXDRIenterServer, __glXDRIleaveServer);
+
+    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 (pSAREA != NULL)
+	drmUnmap(pSAREA, SAREA_MAX);
+
+    if (framebuffer.base != NULL)
+	drmUnmap((drmAddress)framebuffer.base, framebuffer.size);
+
+    if (fd >= 0)
+	drmCloseOnce(fd);
+
+    DRICloseConnection(pScreen);
+
+    if (screen->driver)
+        dlclose(screen->driver);
+
+    xfree(screen);
+
+    LogMessage(X_ERROR, "AIGLX: reverting to software rendering\n");
+
+    return NULL;
+}
+
+__GLXprovider __glXDRIProvider = {
+    __glXDRIscreenProbe,
+    "DRI",
+    NULL
+};