Xwayland DDX

Started out as an Xorg module to be used from Xorg drivers to let
Xorg run under a wayland server.  The idea was to be able to reuse the
2D acceleration from the Xorg driver.  Now with glamor being credible,
a better plan is to just make Xwayland its own DDX, similar to Xwin
and Xquartz.  This is a much better fit, as much of the code in the
original approach had to hack around Xorg doing Xorg things like take
over the VT, probe input devices and read config files.  Another big win
is that Xwayland dosn't need to be setuid root.

The Xwayland support for DRI3, Glamor and render nodes was done by
Axel Davy <axel.davy@ens.fr>, who also did a lot of work on the rebase
to the Xwayland DDX.

Contributions from:

  Christopher James Halse Rogers <christopher.halse.rogers@canonical.com>
  Corentin Chary <corentin.chary@gmail.com>
  Daniel Stone <daniel@fooishbar.org>
  Kristian Høgsberg <krh@bitplanet.net>
  Robert Bragg <robert@linux.intel.com>
  Scott Moreau <oreaus@gmail.com>
  Tiago Vignatti <tiago.vignatti@intel.com>
  Giovanni Campagna <gcampagn@redhat.com>
  Jonas Ådahl <jadahl@gmail.com>
  Ray Strode <rstrode@redhat.com>
  Trevor McCort <tjmccort@gmail.com>
  Rui Matos <tiagomatos@gmail.com>
  Axel Davy <axel.davy@ens.fr>
  Jasper St. Pierre <jstpierre@mecheye.net>

Signed-off-by: Kristian Høgsberg <krh@bitplanet.net>
Reviewed-by: Axel Davy <axel.davy@ens.fr>

1 files changed, 226 insertions, 0 deletions

diff --git a/hw/xwayland/xwayland-output.c b/hw/xwayland/xwayland-output.c
new file mode 100644
index 000000000..778914c61
--- /dev/null
+++ b/hw/xwayland/xwayland-output.c
@@ -0,0 +1,226 @@
+/*
+ * Copyright © 2011-2014 Intel Corporation
+ *
+ * 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 the
+ * copyright holders not be used in advertising or publicity
+ * pertaining to distribution of the software without specific,
+ * written prior permission.  The copyright holders make no
+ * representations about the suitability of this software for any
+ * purpose.  It is provided "as is" without express or implied
+ * warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS 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 "xwayland.h"
+#include <randrstr.h>
+
+static Rotation
+wl_transform_to_xrandr(enum wl_output_transform transform)
+{
+    switch (transform) {
+    default:
+    case WL_OUTPUT_TRANSFORM_NORMAL:
+        return RR_Rotate_0;
+    case WL_OUTPUT_TRANSFORM_90:
+        return RR_Rotate_90;
+    case WL_OUTPUT_TRANSFORM_180:
+        return RR_Rotate_180;
+    case WL_OUTPUT_TRANSFORM_270:
+        return RR_Rotate_270;
+    case WL_OUTPUT_TRANSFORM_FLIPPED:
+        return RR_Reflect_X | RR_Rotate_0;
+    case WL_OUTPUT_TRANSFORM_FLIPPED_90:
+        return RR_Reflect_X | RR_Rotate_90;
+    case WL_OUTPUT_TRANSFORM_FLIPPED_180:
+        return RR_Reflect_X | RR_Rotate_180;
+    case WL_OUTPUT_TRANSFORM_FLIPPED_270:
+        return RR_Reflect_X | RR_Rotate_270;
+    }
+}
+
+static int
+wl_subpixel_to_xrandr(int subpixel)
+{
+    switch (subpixel) {
+    default:
+    case WL_OUTPUT_SUBPIXEL_UNKNOWN:
+        return SubPixelUnknown;
+    case WL_OUTPUT_SUBPIXEL_NONE:
+        return SubPixelNone;
+    case WL_OUTPUT_SUBPIXEL_HORIZONTAL_RGB:
+        return SubPixelHorizontalRGB;
+    case WL_OUTPUT_SUBPIXEL_HORIZONTAL_BGR:
+        return SubPixelHorizontalBGR;
+    case WL_OUTPUT_SUBPIXEL_VERTICAL_RGB:
+        return SubPixelVerticalRGB;
+    case WL_OUTPUT_SUBPIXEL_VERTICAL_BGR:
+        return SubPixelVerticalBGR;
+    }
+}
+
+static void
+output_handle_geometry(void *data, struct wl_output *wl_output, int x, int y,
+                       int physical_width, int physical_height, int subpixel,
+                       const char *make, const char *model, int transform)
+{
+    struct xwl_output *xwl_output = data;
+
+    RROutputSetPhysicalSize(xwl_output->randr_output,
+                            physical_width, physical_height);
+    RROutputSetSubpixelOrder(xwl_output->randr_output,
+                             wl_subpixel_to_xrandr(subpixel));
+    xwl_output->x = x;
+    xwl_output->y = y;
+
+    xwl_output->rotation = wl_transform_to_xrandr(transform);
+}
+
+static void
+output_handle_mode(void *data, struct wl_output *wl_output, uint32_t flags,
+                   int width, int height, int refresh)
+{
+    struct xwl_output *xwl_output = data;
+    RRModePtr randr_mode;
+
+    if (!(flags & WL_OUTPUT_MODE_CURRENT))
+        return;
+
+    xwl_output->width = width;
+    xwl_output->height = height;
+
+    randr_mode = xwayland_cvt(width, height, refresh / 1000.0, 0, 0);
+
+    RROutputSetModes(xwl_output->randr_output, &randr_mode, 1, 1);
+
+    RRCrtcNotify(xwl_output->randr_crtc, randr_mode,
+                 xwl_output->x, xwl_output->y,
+                 xwl_output->rotation, NULL, 1, &xwl_output->randr_output);
+}
+
+static void
+output_handle_done(void *data, struct wl_output *wl_output)
+{
+    struct xwl_output *xwl_output = data;
+    struct xwl_screen *xwl_screen = xwl_output->xwl_screen;
+    int width, height;
+
+    xorg_list_append(&xwl_output->link, &xwl_screen->output_list);
+
+    width = 0;
+    height = 0;
+    xorg_list_for_each_entry(xwl_output, &xwl_screen->output_list, link) {
+        if (width < xwl_output->x + xwl_output->width)
+            width = xwl_output->x + xwl_output->width;
+        if (height < xwl_output->y + xwl_output->height)
+            height = xwl_output->y + xwl_output->height;
+    }
+
+    xwl_screen->width = width;
+    xwl_screen->height = height;
+    RRScreenSizeNotify(xwl_screen->screen);
+
+    xwl_screen->expecting_event--;
+}
+
+static void
+output_handle_scale(void *data, struct wl_output *wl_output, int32_t factor)
+{
+}
+
+static const struct wl_output_listener output_listener = {
+    output_handle_geometry,
+    output_handle_mode,
+    output_handle_done,
+    output_handle_scale
+};
+
+struct xwl_output *
+xwl_output_create(struct xwl_screen *xwl_screen, uint32_t id)
+{
+    struct xwl_output *xwl_output;
+    static int serial;
+    char name[256];
+
+    xwl_output = calloc(sizeof *xwl_output, 1);
+    if (xwl_output == NULL) {
+        ErrorF("create_output ENOMEM");
+        return NULL;
+    }
+
+    xwl_output->output = wl_registry_bind(xwl_screen->registry, id,
+                                          &wl_output_interface, 2);
+    wl_output_add_listener(xwl_output->output, &output_listener, xwl_output);
+
+    if (snprintf(name, sizeof name, "XWAYLAND%d", serial++) < 0) {
+        ErrorF("create_output ENOMEM");
+        free(xwl_output);
+        return NULL;
+    }
+
+    xwl_output->xwl_screen = xwl_screen;
+    xwl_output->randr_crtc = RRCrtcCreate(xwl_screen->screen, xwl_output);
+    xwl_output->randr_output = RROutputCreate(xwl_screen->screen, name,
+                                              strlen(name), xwl_output);
+    RRCrtcGammaSetSize(xwl_output->randr_crtc, 256);
+    RROutputSetCrtcs(xwl_output->randr_output, &xwl_output->randr_crtc, 1);
+    RROutputSetConnection(xwl_output->randr_output, RR_Connected);
+
+    return xwl_output;
+}
+
+void
+xwl_output_destroy(struct xwl_output *xwl_output)
+{
+    wl_output_destroy(xwl_output->output);
+    RRCrtcDestroy(xwl_output->randr_crtc);
+    RROutputDestroy(xwl_output->randr_output);
+    free(xwl_output);
+}
+
+static Bool
+xwl_randr_get_info(ScreenPtr pScreen, Rotation * rotations)
+{
+    *rotations = 0;
+
+    return TRUE;
+}
+
+static Bool
+xwl_randr_set_config(ScreenPtr pScreen,
+                     Rotation rotation, int rate, RRScreenSizePtr pSize)
+{
+    return FALSE;
+}
+
+Bool
+xwl_screen_init_output(struct xwl_screen *xwl_screen)
+{
+    rrScrPrivPtr rp;
+
+    if (!RRScreenInit(xwl_screen->screen))
+        return FALSE;
+
+    RRScreenSetSizeRange(xwl_screen->screen, 320, 200, 8192, 8192);
+
+    rp = rrGetScrPriv(xwl_screen->screen);
+    rp->rrGetInfo = xwl_randr_get_info;
+    rp->rrSetConfig = xwl_randr_set_config;
+
+    return TRUE;
+}