Add rudimentary tests for DRI3

This is a simple little test to create a pixmap from a local bo, copy it
to a normal pixmap, then read it back by importing it into anther local
bo. It tests the fundamental mechanisms of opening a DRI3 render device,
importing into pixmaps, exporting into /buffers and a read-barrier.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 130 insertions, 0 deletions

diff --git a/test/dri3.c b/test/dri3.c
new file mode 100644
index 00000000..99503310
--- /dev/null
+++ b/test/dri3.c
@@ -0,0 +1,130 @@
+/*
+ * Copyright (c) 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#include <X11/Xlib.h>
+#include <X11/Xlib-xcb.h>
+#include <X11/xshmfence.h>
+#include <xcb/xcb.h>
+#include <xcb/dri3.h>
+#include <xcb/sync.h>
+#include <unistd.h>
+
+#include "dri3.h"
+
+Pixmap dri3_create_pixmap(Display *dpy,
+			  Drawable draw,
+			  int width, int height, int depth,
+			  int fd, int bpp, int stride, int size)
+{
+	xcb_connection_t *c = XGetXCBConnection(dpy);
+	xcb_pixmap_t pixmap = xcb_generate_id(c);
+	xcb_dri3_pixmap_from_buffer(c, pixmap, draw, size, width, height, stride, depth, bpp, fd);
+	return pixmap;
+}
+
+int dri3_create_fd(Display *dpy,
+		   Pixmap pixmap,
+		   int *stride)
+{
+	xcb_connection_t *c = XGetXCBConnection(dpy);
+	xcb_dri3_buffer_from_pixmap_cookie_t cookie;
+	xcb_dri3_buffer_from_pixmap_reply_t *reply;
+
+	cookie = xcb_dri3_buffer_from_pixmap(c, pixmap);
+	reply = xcb_dri3_buffer_from_pixmap_reply(c, cookie, NULL);
+	if (!reply)
+		return -1;
+
+	if (reply->nfd != 1)
+		return -1;
+
+	*stride = reply->stride;
+	return xcb_dri3_buffer_from_pixmap_reply_fds(c, reply)[0];
+}
+
+int dri3_create_fence(Display *dpy, Pixmap pixmap, struct dri3_fence *fence)
+{
+	xcb_connection_t *c = XGetXCBConnection(dpy);
+	struct dri3_fence f;
+	int fd;
+
+	fd = xshmfence_alloc_shm();
+	if (fd < 0)
+		return -1;
+
+	f.addr = xshmfence_map_shm(fd);
+	if (f.addr == NULL) {
+		close(fd);
+		return -1;
+	}
+
+	f.xid = xcb_generate_id(c);
+	xcb_dri3_fence_from_fd(c, pixmap, f.xid, 0, fd);
+
+	*fence = f;
+	return 0;
+}
+
+void dri3_fence_sync(Display *dpy, struct dri3_fence *fence)
+{
+	xcb_connection_t *c = XGetXCBConnection(dpy);
+
+	xshmfence_reset(fence->addr);
+
+	xcb_sync_trigger_fence(c, fence->xid);
+	xcb_flush(c);
+
+	xshmfence_await(fence->addr);
+}
+
+void dri3_fence_free(Display *dpy, struct dri3_fence *fence)
+{
+	xcb_connection_t *c = XGetXCBConnection(dpy);
+
+	xshmfence_unmap_shm(fence->addr);
+	xcb_sync_destroy_fence(c, fence->xid);
+}
+
+int dri3_open__full(Display *dpy, Window root, unsigned provider)
+{
+	xcb_connection_t *c = XGetXCBConnection(dpy);
+	xcb_dri3_open_cookie_t cookie;
+	xcb_dri3_open_reply_t *reply;
+
+	cookie = xcb_dri3_open(c, root, provider);
+	reply = xcb_dri3_open_reply(c, cookie, NULL);
+
+	if (!reply)
+		return -1;
+
+	if (reply->nfd != 1)
+		return -1;
+
+	return xcb_dri3_open_reply_fds(c, reply)[0];
+}
+
+int dri3_open(Display *dpy)
+{
+	return dri3_open__full(dpy, RootWindow(dpy, DefaultScreen(dpy)), None);
+}