XVMC: Use XCB DRI2 instead of cargo-culting our own copy of Xlib stuff. (v2)

v2: Incorporate comments from Jamey on device name handling and extension
detection.

4 files changed, 79 insertions, 413 deletions

diff --git a/src/xvmc/Makefile.am b/src/xvmc/Makefile.am
index 6cbba6af..59212441 100644
--- a/src/xvmc/Makefile.am
+++ b/src/xvmc/Makefile.am
@@ -24,9 +24,7 @@ libIntelXvMC_la_SOURCES = intel_xvmc.c \
         xvmc_vld.c                     \
         xvmc_vld.h                     \
         intel_batchbuffer.c            \
-        intel_batchbuffer.h            \
-        dri2.c                         \
-        dri2.h	
+        intel_batchbuffer.h
 
 libIntelXvMC_la_CFLAGS = @XORG_CFLAGS@ @DRM_CFLAGS@ @DRI_CFLAGS@ \
 	@XVMCLIB_CFLAGS@ -I$(top_srcdir)/src -DTRUE=1 -DFALSE=0
diff --git a/src/xvmc/dri2.c b/src/xvmc/dri2.c
deleted file mode 100644
index 1ba94823..00000000
--- a/src/xvmc/dri2.c
+++ /dev/null
@@ -1,298 +0,0 @@
-/*
- * 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:
- *   Kristian Høgsberg (krh@redhat.com)
- */
-
-#define NEED_REPLIES
-#include <X11/Xlibint.h>
-#include <X11/extensions/Xext.h>
-#include <X11/extensions/extutil.h>
-#include <X11/extensions/dri2proto.h>
-#include "xf86drm.h"
-#include "dri2.h"
-
-static char dri2ExtensionName[] = DRI2_NAME;
-static XExtensionInfo *dri2Info;
-static XEXT_GENERATE_CLOSE_DISPLAY(DRI2CloseDisplay, dri2Info)
-static /* const */ XExtensionHooks dri2ExtensionHooks = {
-	NULL,			/* create_gc */
-	NULL,			/* copy_gc */
-	NULL,			/* flush_gc */
-	NULL,			/* free_gc */
-	NULL,			/* create_font */
-	NULL,			/* free_font */
-	DRI2CloseDisplay,	/* close_display */
-	NULL,			/* wire_to_event */
-	NULL,			/* event_to_wire */
-	NULL,			/* error */
-	NULL,			/* error_string */
-};
-
-static XEXT_GENERATE_FIND_DISPLAY(DRI2FindDisplay, dri2Info,
-				  dri2ExtensionName,
-				  &dri2ExtensionHooks, 0, NULL)
-
-Bool DRI2QueryExtension(Display * dpy, int *eventBase, int *errorBase)
-{
-	XExtDisplayInfo *info = DRI2FindDisplay(dpy);
-
-	if (XextHasExtension(info)) {
-		*eventBase = info->codes->first_event;
-		*errorBase = info->codes->first_error;
-		return True;
-	}
-
-	return False;
-}
-
-Bool DRI2QueryVersion(Display * dpy, int *major, int *minor)
-{
-	XExtDisplayInfo *info = DRI2FindDisplay(dpy);
-	xDRI2QueryVersionReply rep;
-	xDRI2QueryVersionReq *req;
-
-	XextCheckExtension(dpy, info, dri2ExtensionName, False);
-
-	LockDisplay(dpy);
-	GetReq(DRI2QueryVersion, req);
-	req->reqType = info->codes->major_opcode;
-	req->dri2ReqType = X_DRI2QueryVersion;
-	req->majorVersion = DRI2_MAJOR;
-	req->minorVersion = DRI2_MINOR;
-	if (!_XReply(dpy, (xReply *) & rep, 0, xFalse)) {
-		UnlockDisplay(dpy);
-		SyncHandle();
-		return False;
-	}
-	*major = rep.majorVersion;
-	*minor = rep.minorVersion;
-	UnlockDisplay(dpy);
-	SyncHandle();
-
-	return True;
-}
-
-Bool DRI2Connect(Display * dpy, XID window,
-		 char **driverName, char **deviceName)
-{
-	XExtDisplayInfo *info = DRI2FindDisplay(dpy);
-	xDRI2ConnectReply rep;
-	xDRI2ConnectReq *req;
-
-	XextCheckExtension(dpy, info, dri2ExtensionName, False);
-
-	LockDisplay(dpy);
-	GetReq(DRI2Connect, req);
-	req->reqType = info->codes->major_opcode;
-	req->dri2ReqType = X_DRI2Connect;
-	req->window = window;
-	req->driverType = DRI2DriverDRI;
-	if (!_XReply(dpy, (xReply *) & rep, 0, xFalse)) {
-		UnlockDisplay(dpy);
-		SyncHandle();
-		return False;
-	}
-
-	if (rep.driverNameLength == 0 && rep.deviceNameLength == 0) {
-		UnlockDisplay(dpy);
-		SyncHandle();
-		return False;
-	}
-
-	*driverName = Xmalloc(rep.driverNameLength + 1);
-	if (*driverName == NULL) {
-		_XEatData(dpy,
-			  ((rep.driverNameLength + 3) & ~3) +
-			  ((rep.deviceNameLength + 3) & ~3));
-		UnlockDisplay(dpy);
-		SyncHandle();
-		return False;
-	}
-	_XReadPad(dpy, *driverName, rep.driverNameLength);
-	(*driverName)[rep.driverNameLength] = '\0';
-
-	*deviceName = Xmalloc(rep.deviceNameLength + 1);
-	if (*deviceName == NULL) {
-		Xfree(*driverName);
-		_XEatData(dpy, ((rep.deviceNameLength + 3) & ~3));
-		UnlockDisplay(dpy);
-		SyncHandle();
-		return False;
-	}
-	_XReadPad(dpy, *deviceName, rep.deviceNameLength);
-	(*deviceName)[rep.deviceNameLength] = '\0';
-
-	UnlockDisplay(dpy);
-	SyncHandle();
-
-	return True;
-}
-
-Bool DRI2Authenticate(Display * dpy, XID window, drm_magic_t magic)
-{
-	XExtDisplayInfo *info = DRI2FindDisplay(dpy);
-	xDRI2AuthenticateReq *req;
-	xDRI2AuthenticateReply rep;
-
-	XextCheckExtension(dpy, info, dri2ExtensionName, False);
-
-	LockDisplay(dpy);
-	GetReq(DRI2Authenticate, req);
-	req->reqType = info->codes->major_opcode;
-	req->dri2ReqType = X_DRI2Authenticate;
-	req->window = window;
-	req->magic = magic;
-
-	if (!_XReply(dpy, (xReply *) & rep, 0, xFalse)) {
-		UnlockDisplay(dpy);
-		SyncHandle();
-		return False;
-	}
-
-	UnlockDisplay(dpy);
-	SyncHandle();
-
-	return rep.authenticated;
-}
-
-void DRI2CreateDrawable(Display * dpy, XID drawable)
-{
-	XExtDisplayInfo *info = DRI2FindDisplay(dpy);
-	xDRI2CreateDrawableReq *req;
-
-	XextSimpleCheckExtension(dpy, info, dri2ExtensionName);
-
-	LockDisplay(dpy);
-	GetReq(DRI2CreateDrawable, req);
-	req->reqType = info->codes->major_opcode;
-	req->dri2ReqType = X_DRI2CreateDrawable;
-	req->drawable = drawable;
-	UnlockDisplay(dpy);
-	SyncHandle();
-}
-
-void DRI2DestroyDrawable(Display * dpy, XID drawable)
-{
-	XExtDisplayInfo *info = DRI2FindDisplay(dpy);
-	xDRI2DestroyDrawableReq *req;
-
-	XextSimpleCheckExtension(dpy, info, dri2ExtensionName);
-
-	XSync(dpy, False);
-
-	LockDisplay(dpy);
-	GetReq(DRI2DestroyDrawable, req);
-	req->reqType = info->codes->major_opcode;
-	req->dri2ReqType = X_DRI2DestroyDrawable;
-	req->drawable = drawable;
-	UnlockDisplay(dpy);
-	SyncHandle();
-}
-
-DRI2Buffer *DRI2GetBuffers(Display * dpy, XID drawable,
-			   int *width, int *height,
-			   unsigned int *attachments, int count, int *outCount)
-{
-	XExtDisplayInfo *info = DRI2FindDisplay(dpy);
-	xDRI2GetBuffersReply rep;
-	xDRI2GetBuffersReq *req;
-	DRI2Buffer *buffers;
-	xDRI2Buffer repBuffer;
-	CARD32 *p;
-	int i;
-
-	XextCheckExtension(dpy, info, dri2ExtensionName, False);
-
-	LockDisplay(dpy);
-	GetReqExtra(DRI2GetBuffers, count * 4, req);
-	req->reqType = info->codes->major_opcode;
-	req->dri2ReqType = X_DRI2GetBuffers;
-	req->drawable = drawable;
-	req->count = count;
-	p = (CARD32 *) & req[1];
-	for (i = 0; i < count; i++)
-		p[i] = attachments[i];
-
-	if (!_XReply(dpy, (xReply *) & rep, 0, xFalse)) {
-		UnlockDisplay(dpy);
-		SyncHandle();
-		return NULL;
-	}
-
-	*width = rep.width;
-	*height = rep.height;
-	*outCount = rep.count;
-
-	buffers = Xmalloc(rep.count * sizeof buffers[0]);
-	if (buffers == NULL) {
-		_XEatData(dpy, rep.count * sizeof repBuffer);
-		UnlockDisplay(dpy);
-		SyncHandle();
-		return NULL;
-	}
-
-	for (i = 0; i < rep.count; i++) {
-		_XReadPad(dpy, (char *)&repBuffer, sizeof repBuffer);
-		buffers[i].attachment = repBuffer.attachment;
-		buffers[i].name = repBuffer.name;
-		buffers[i].pitch = repBuffer.pitch;
-		buffers[i].cpp = repBuffer.cpp;
-		buffers[i].flags = repBuffer.flags;
-	}
-
-	UnlockDisplay(dpy);
-	SyncHandle();
-
-	return buffers;
-}
-
-void DRI2CopyRegion(Display * dpy, XID drawable, XserverRegion region,
-		    CARD32 dest, CARD32 src)
-{
-	XExtDisplayInfo *info = DRI2FindDisplay(dpy);
-	xDRI2CopyRegionReq *req;
-	xDRI2CopyRegionReply rep;
-
-	XextSimpleCheckExtension(dpy, info, dri2ExtensionName);
-
-	LockDisplay(dpy);
-	GetReq(DRI2CopyRegion, req);
-	req->reqType = info->codes->major_opcode;
-	req->dri2ReqType = X_DRI2CopyRegion;
-	req->drawable = drawable;
-	req->region = region;
-	req->dest = dest;
-	req->src = src;
-
-	_XReply(dpy, (xReply *) & rep, 0, xFalse);
-
-	UnlockDisplay(dpy);
-	SyncHandle();
-}
diff --git a/src/xvmc/dri2.h b/src/xvmc/dri2.h
deleted file mode 100644
index ac6ce58d..00000000
--- a/src/xvmc/dri2.h
+++ /dev/null
@@ -1,65 +0,0 @@
-/*
- * Copyright © 2007,2008 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:
- *   Kristian Høgsberg (krh@redhat.com)
- */
-
-#ifndef _DRI2_H_
-#define _DRI2_H_
-
-#include <X11/extensions/Xfixes.h>
-#include <X11/extensions/dri2tokens.h>
-
-typedef struct {
-	unsigned int attachment;
-	unsigned int name;
-	unsigned int pitch;
-	unsigned int cpp;
-	unsigned int flags;
-} DRI2Buffer;
-
-extern Bool
-DRI2QueryExtension(Display * display, int *eventBase, int *errorBase);
-extern Bool DRI2QueryVersion(Display * display, int *major, int *minor);
-extern Bool
-DRI2Connect(Display * display, XID window,
-	    char **driverName, char **deviceName);
-extern Bool DRI2Authenticate(Display * display, XID window, drm_magic_t magic);
-extern void DRI2CreateDrawable(Display * display, XID drawable);
-extern void DRI2DestroyDrawable(Display * display, XID handle);
-extern DRI2Buffer *DRI2GetBuffers(Display * dpy, XID drawable,
-				  int *width, int *height,
-				  unsigned int *attachments, int count,
-				  int *outCount);
-
-extern void
-DRI2CopyRegion(Display * dpy, XID drawable, XserverRegion region,
-	       CARD32 dest, CARD32 src);
-
-#endif
diff --git a/src/xvmc/intel_xvmc.c b/src/xvmc/intel_xvmc.c
index 947f97d4..c94ae4a1 100644
--- a/src/xvmc/intel_xvmc.c
+++ b/src/xvmc/intel_xvmc.c
@@ -25,7 +25,11 @@
  *
  */
 #include "intel_xvmc.h"
-#include "dri2.h"
+#include <xcb/xcb.h>
+#include <xcb/xcb_aux.h>
+#include <xcb/dri2.h>
+#include <X11/Xlib-xcb.h>
+#include <X11/extensions/dri2tokens.h>
 
 /* global */
 struct _intel_xvmc_driver *xvmc_driver = NULL;
@@ -235,6 +239,77 @@ intel_xvmc_surface_ptr intel_xvmc_find_surface(XID id)
 	return NULL;
 }
 
+static int
+dri2_connect(Display *display)
+{
+	xcb_dri2_query_version_cookie_t query_version_cookie;
+	xcb_dri2_query_version_reply_t *query_version_reply;
+	xcb_dri2_connect_cookie_t connect_cookie;
+	xcb_dri2_connect_reply_t *connect_reply;
+	xcb_dri2_authenticate_cookie_t auth_cookie;
+	xcb_dri2_authenticate_reply_t *auth_reply;
+	xcb_screen_t *root;
+	xcb_connection_t *c = XGetXCBConnection(display);
+	drm_magic_t magic;
+	const xcb_query_extension_reply_t *dri2_reply;
+	char *device_name;
+	int len;
+
+	root = xcb_aux_get_screen(c, DefaultScreen(display));
+
+	dri2_reply = xcb_get_extension_data(c, &xcb_dri2_id);
+
+	if (!dri2_reply) {
+		XVMC_ERR("DRI2 required");
+		return BadValue;
+	}
+
+	/* Query the extension and make our first use of it at the same time. */
+	query_version_cookie = xcb_dri2_query_version(c, 1, 0);
+	connect_cookie = xcb_dri2_connect(c, root->root, DRI2DriverDRI);
+
+	query_version_reply =
+		xcb_dri2_query_version_reply(c, query_version_cookie, NULL);
+	connect_reply = xcb_dri2_connect_reply(c, connect_cookie, NULL);
+
+	if (!query_version_reply) {
+		XVMC_ERR("DRI2 required");
+		return BadValue;
+	}
+	free(query_version_reply);
+
+	len = xcb_dri2_connect_device_name_length(connect_reply);
+	device_name = malloc(len + 1);
+	if (!device_name) {
+		XVMC_ERR("malloc failure");
+		return BadAlloc;
+	}
+	strncpy(device_name, xcb_dri2_connect_device_name(connect_reply), len);
+	device_name[len] = 0;
+	xvmc_driver->fd = open(device_name, O_RDWR);
+	free(device_name);
+	free(connect_reply);
+	if (xvmc_driver->fd < 0) {
+		XVMC_ERR("Failed to open drm device: %s\n", strerror(errno));
+		return BadValue;
+	}
+
+	if (drmGetMagic(xvmc_driver->fd, &magic)) {
+		XVMC_ERR("Failed to get magic\n");
+		return BadValue;
+	}
+
+	auth_cookie = xcb_dri2_authenticate(c, root->root, magic);
+	auth_reply = xcb_dri2_authenticate_reply(c, auth_cookie, NULL);
+	if (!auth_reply) {
+		XVMC_ERR("Failed to authenticate magic %d\n", magic);
+		return BadValue;
+	}
+	free(auth_reply);
+
+	return Success;
+}
+
 /*
 * Function: XvMCCreateContext
 * Description: Create a XvMC context for the given surface parameters.
@@ -258,7 +333,6 @@ _X_EXPORT Status XvMCCreateContext(Display * display, XvPortID port,
 	Status ret;
 	CARD32 *priv_data = NULL;
 	struct _intel_xvmc_common *comm;
-	drm_magic_t magic;
 	int major, minor;
 	int error_base;
 	int event_base;
@@ -295,6 +369,7 @@ _X_EXPORT Status XvMCCreateContext(Display * display, XvPortID port,
 		XVMC_ERR("XvMCExtension is not available!");
 		return BadValue;
 	}
+
 	ret = XvMCQueryVersion(display, &major, &minor);
 	if (ret) {
 		XVMC_ERR
@@ -360,56 +435,12 @@ _X_EXPORT Status XvMCCreateContext(Display * display, XvPortID port,
 	ret = Success;
 	xvmc_driver->fd = -1;
 
-	do {
-		if (!DRI2QueryExtension(display, &event_base, &error_base)) {
-			ret = BadValue;
-			break;
-		}
-
-		if (!DRI2QueryVersion(display, &major, &minor)) {
-			ret = BadValue;
-			break;
-		}
-
-		if (!DRI2Connect(display, RootWindow(display, screen),
-				 &driverName, &deviceName)) {
-			ret = BadValue;
-			break;
-		}
-
-		xvmc_driver->fd = open(deviceName, O_RDWR);
-
-		if (xvmc_driver->fd < 0) {
-			XVMC_ERR("Failed to open drm device: %s\n",
-				 strerror(errno));
-			ret = BadValue;
-			break;
-		}
-
-		if (drmGetMagic(xvmc_driver->fd, &magic)) {
-			XVMC_ERR("Failed to get magic\n");
-			ret = BadValue;
-			break;
-		}
-
-		if (!DRI2Authenticate
-		    (display, RootWindow(display, screen), magic)) {
-			XVMC_ERR("Failed to authenticate magic %d\n", magic);
-			ret = BadValue;
-			break;
-		}
-	} while (0);
-
-	XFree(driverName);
-	XFree(deviceName);
-
+	ret = dri2_connect(display);
 	if (ret != Success) {
 		XFree(priv_data);
 		context->privData = NULL;
-
 		if (xvmc_driver->fd >= 0)
 			close(xvmc_driver->fd);
-
 		xvmc_driver = NULL;
 		return ret;
 	}