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From 32987e08e7f1e79ee50ce032cc6c1b6d28e6a50d Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Wed, 26 Jun 2019 16:46:54 +0200
Subject: [PATCH xserver 04/25] xwayland: Add fake output modes to xrandr
output mode lists
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
This is a preparation patch for adding support for apps which want to
change the resolution when they go fullscreen because they are hardcoded
to render at a specific resolution, e.g. 640x480.
Follow up patches will fake the mode-switch these apps want by using
WPviewport to scale there pixmap to cover the entire output.
Reviewed-by: Olivier Fourdan <ofourdan@redhat.com>
Acked-by: Michel Dänzer <mdaenzer@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
(cherry picked from commit 0d656d796071fb637e4969ea800855fe5d1c9728)
---
hw/xwayland/xwayland-output.c | 112 ++++++++++++++++++++++++++++++++--
hw/xwayland/xwayland.c | 17 ++++++
hw/xwayland/xwayland.h | 1 +
3 files changed, 124 insertions(+), 6 deletions(-)
diff --git a/hw/xwayland/xwayland-output.c b/hw/xwayland/xwayland-output.c
index ae646c663..4036ba681 100644
--- a/hw/xwayland/xwayland-output.c
+++ b/hw/xwayland/xwayland-output.c
@@ -208,14 +208,110 @@ update_screen_size(struct xwl_output *xwl_output, int width, int height)
update_desktop_dimensions();
}
+/* From hw/xfree86/common/xf86DefModeSet.c with some obscure modes dropped */
+const int32_t xwl_output_fake_modes[][2] = {
+ /* 4:3 (1.33) */
+ { 2048, 1536 },
+ { 1920, 1440 },
+ { 1600, 1200 },
+ { 1440, 1080 },
+ { 1400, 1050 },
+ { 1280, 1024 }, /* 5:4 (1.25) */
+ { 1280, 960 },
+ { 1152, 864 },
+ { 1024, 768 },
+ { 800, 600 },
+ { 640, 480 },
+ { 320, 240 },
+ /* 16:10 (1.6) */
+ { 2560, 1600 },
+ { 1920, 1200 },
+ { 1680, 1050 },
+ { 1440, 900 },
+ { 1280, 800 },
+ { 720, 480 }, /* 3:2 (1.5) */
+ { 640, 400 },
+ { 320, 200 },
+ /* 16:9 (1.77) */
+ { 5120, 2880 },
+ { 4096, 2304 },
+ { 3840, 2160 },
+ { 3200, 1800 },
+ { 2880, 1620 },
+ { 2560, 1440 },
+ { 2048, 1152 },
+ { 1920, 1080 },
+ { 1600, 900 },
+ { 1368, 768 },
+ { 1280, 720 },
+ { 1024, 576 },
+ { 864, 486 },
+ { 720, 400 },
+ { 640, 350 },
+};
+
+/* Build an array with RRModes the first mode is the actual output mode, the
+ * rest are fake modes from the xwl_output_fake_modes list. We do this for apps
+ * which want to change resolution when they go fullscreen.
+ * When an app requests a mode-change, we fake it using WPviewport.
+ */
+static RRModePtr *
+output_get_rr_modes(struct xwl_output *xwl_output,
+ int32_t width, int32_t height,
+ int *count)
+{
+ struct xwl_screen *xwl_screen = xwl_output->xwl_screen;
+ RRModePtr *rr_modes;
+ int i;
+
+ rr_modes = xallocarray(ARRAY_SIZE(xwl_output_fake_modes) + 1, sizeof(RRModePtr));
+ if (!rr_modes)
+ goto err;
+
+ /* Add actual output mode */
+ rr_modes[0] = xwayland_cvt(width, height, xwl_output->refresh / 1000.0, 0, 0);
+ if (!rr_modes[0])
+ goto err;
+
+ *count = 1;
+
+ if (!xwl_screen_has_resolution_change_emulation(xwl_screen))
+ return rr_modes;
+
+ /* Add fake modes */
+ for (i = 0; i < ARRAY_SIZE(xwl_output_fake_modes); i++) {
+ /* Skip actual output mode, already added */
+ if (xwl_output_fake_modes[i][0] == width &&
+ xwl_output_fake_modes[i][1] == height)
+ continue;
+
+ /* Skip modes which are too big, avoid downscaling */
+ if (xwl_output_fake_modes[i][0] > width ||
+ xwl_output_fake_modes[i][1] > height)
+ continue;
+
+ rr_modes[*count] = xwayland_cvt(xwl_output_fake_modes[i][0],
+ xwl_output_fake_modes[i][1],
+ xwl_output->refresh / 1000.0, 0, 0);
+ if (!rr_modes[*count])
+ goto err;
+
+ (*count)++;
+ }
+
+ return rr_modes;
+err:
+ FatalError("Failed to allocate memory for list of RR modes");
+}
+
static void
apply_output_change(struct xwl_output *xwl_output)
{
struct xwl_screen *xwl_screen = xwl_output->xwl_screen;
struct xwl_output *it;
- int mode_width, mode_height;
+ int mode_width, mode_height, count;
int width = 0, height = 0, has_this_output = 0;
- RRModePtr randr_mode;
+ RRModePtr *randr_modes;
Bool need_rotate;
/* Clear out the "done" received flags */
@@ -234,12 +330,16 @@ apply_output_change(struct xwl_output *xwl_output)
mode_height = xwl_output->width;
}
- randr_mode = xwayland_cvt(mode_width, mode_height,
- xwl_output->refresh / 1000.0, 0, 0);
- RROutputSetModes(xwl_output->randr_output, &randr_mode, 1, 1);
- RRCrtcNotify(xwl_output->randr_crtc, randr_mode,
+ /* Build a fresh modes array using the current refresh rate */
+ randr_modes = output_get_rr_modes(xwl_output, mode_width, mode_height, &count);
+ RROutputSetModes(xwl_output->randr_output, randr_modes, count, 1);
+ RRCrtcNotify(xwl_output->randr_crtc, randr_modes[0],
xwl_output->x, xwl_output->y,
xwl_output->rotation, NULL, 1, &xwl_output->randr_output);
+ /* RROutputSetModes takes ownership of the passed in modes, so we only
+ * have to free the pointer array.
+ */
+ free(randr_modes);
xorg_list_for_each_entry(it, &xwl_screen->output_list, link) {
/* output done event is sent even when some property
diff --git a/hw/xwayland/xwayland.c b/hw/xwayland/xwayland.c
index 811257b00..e84515f94 100644
--- a/hw/xwayland/xwayland.c
+++ b/hw/xwayland/xwayland.c
@@ -154,6 +154,23 @@ xwl_screen_get(ScreenPtr screen)
return dixLookupPrivate(&screen->devPrivates, &xwl_screen_private_key);
}
+static Bool
+xwl_screen_has_viewport_support(struct xwl_screen *xwl_screen)
+{
+ return wl_compositor_get_version(xwl_screen->compositor) >=
+ WL_SURFACE_DAMAGE_BUFFER_SINCE_VERSION &&
+ xwl_screen->viewporter != NULL;
+}
+
+Bool
+xwl_screen_has_resolution_change_emulation(struct xwl_screen *xwl_screen)
+{
+ /* Resolution change emulation is only supported in rootless mode and
+ * it requires viewport support.
+ */
+ return xwl_screen->rootless && xwl_screen_has_viewport_support(xwl_screen);
+}
+
static void
xwl_window_set_allow_commits(struct xwl_window *xwl_window, Bool allow,
const char *debug_msg)
diff --git a/hw/xwayland/xwayland.h b/hw/xwayland/xwayland.h
index 1244d2e91..200e18a8d 100644
--- a/hw/xwayland/xwayland.h
+++ b/hw/xwayland/xwayland.h
@@ -391,6 +391,7 @@ void xwl_screen_roundtrip (struct xwl_screen *xwl_screen);
Bool xwl_screen_init_cursor(struct xwl_screen *xwl_screen);
struct xwl_screen *xwl_screen_get(ScreenPtr screen);
+Bool xwl_screen_has_resolution_change_emulation(struct xwl_screen *xwl_screen);
void xwl_tablet_tool_set_cursor(struct xwl_tablet_tool *tool);
void xwl_seat_set_cursor(struct xwl_seat *xwl_seat);
--
2.28.0
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