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xwayland: Fix emulated modes not being removed when screen rotation is used 

The code building the mode-list does the following to deal with screen
rotation:

    if (need_rotate || xwl_output->rotation & (RR_Rotate_0 | RR_Rotate_180)) {
        mode_width = xwl_output->width;
        mode_height = xwl_output->height;
    } else {
        mode_width = xwl_output->height;
        mode_height = xwl_output->width;
    }

This means we need to do something similar in xwl_output_set_emulated_mode()
to determine if the mode being set is the actual (not-emulated) output mode
and we this should remove any emulated modes set by the client.

All callers of xwl_output_set_emulated_mode always pass a mode pointer
to a member of xwl_output->randr_output->modes, so we do not need to
duplicate this code, instead we can simply check that the passed in mode
is modes[0] which always is the actual output mode.

Acked-by: Olivier Fourdan <ofourdan@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Hans de Goede 2019-10-07 14:27:49 +02:00
parent 10df0437a2
commit 88342353de
1 changed files with 6 additions and 2 deletions
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8
hw/xwayland/xwayland-output.c
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@ -313,8 +313,11 @@ xwl_output_remove_emulated_mode_for_client(struct xwl_output *xwl_output,
struct xwl_emulated_mode *emulated_mode;
emulated_mode = xwl_output_get_emulated_mode_for_client(xwl_output, client);
if (emulated_mode)
if (emulated_mode) {
DebugF("XWAYLAND: xwl_output_remove_emulated_mode: %dx%d\n",
emulated_mode->width, emulated_mode->height);
memset(emulated_mode, 0, sizeof(*emulated_mode));
}
}
/* From hw/xfree86/common/xf86DefModeSet.c with some obscure modes dropped */
@ -515,7 +518,8 @@ xwl_output_set_emulated_mode(struct xwl_output *xwl_output, ClientPtr client,
from_vidmode ? "vidmode" : "randr",
mode->mode.width, mode->mode.height);
if (mode->mode.width == xwl_output->width && mode->mode.height == xwl_output->height)
/* modes[0] is the actual (not-emulated) output mode */
if (mode == xwl_output->randr_output->modes[0])
xwl_output_remove_emulated_mode_for_client(xwl_output, client);
else
xwl_output_add_emulated_mode_for_client(xwl_output, client, mode, from_vidmode);