Re: [PATCH] drm/qxl: fix cursor position with non-zero hotspot

From: John Keeping
Date: Thu Dec 03 2015 - 05:46:53 EST


On Wed, 18 Nov 2015 13:58:23 +0100, Daniel Vetter wrote:

> On Wed, Nov 18, 2015 at 11:17:25AM +0000, John Keeping wrote:
> > The SPICE protocol considers the position of a cursor to be the
> > location of its active pixel on the display, so the cursor is drawn
> > with its top-left corner at "(x - hot_spot_x, y - hot_spot_y)" but
> > the DRM cursor position gives the location where the top-left
> > corner should be drawn, with the hotspot being a hint for drivers
> > that need it.
> >
> > This fixes the location of the window resize cursors when using
> > Fluxbox with the QXL DRM driver and both the QXL and modesetting X
> > drivers.
> >
> > Signed-off-by: John Keeping <john@xxxxxxxxxxxx>
> > ---
> > This comes from the discussion in the thread at [1]. My test
> > environment is using:
> >
> > - X.Org X Server 1.17.4
> > - xf86-video-qxl 0.1.4
> > - spice-gtk3 0.30
> >
> > [1]
> > http://lists.freedesktop.org/archives/dri-devel/2015-November/thread.html#94650
> >
> > drivers/gpu/drm/qxl/qxl_display.c | 13 +++++++++----
> > drivers/gpu/drm/qxl/qxl_drv.h | 2 ++
> > 2 files changed, 11 insertions(+), 4 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/qxl/qxl_display.c
> > b/drivers/gpu/drm/qxl/qxl_display.c index 183aea1..5edebf4 100644
> > --- a/drivers/gpu/drm/qxl/qxl_display.c
> > +++ b/drivers/gpu/drm/qxl/qxl_display.c
> > @@ -375,10 +375,15 @@ static int qxl_crtc_cursor_set2(struct
> > drm_crtc *crtc,
> > qxl_bo_kunmap(user_bo);
> >
> > + qcrtc->cur_x += qcrtc->hot_spot_x - hot_x;
> > + qcrtc->cur_y += qcrtc->hot_spot_y - hot_y;
> > + qcrtc->hot_spot_x = hot_x;
> > + qcrtc->hot_spot_y = hot_y;
>
> Yay for the artificial split of the legacy driver interface for
> cursors.
>
> Reviewed-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx
>
> Dave, can you pls pick this up if you agree?

Ping?

> > +
> > cmd = (struct qxl_cursor_cmd *)qxl_release_map(qdev,
> > release); cmd->type = QXL_CURSOR_SET;
> > - cmd->u.set.position.x = qcrtc->cur_x;
> > - cmd->u.set.position.y = qcrtc->cur_y;
> > + cmd->u.set.position.x = qcrtc->cur_x + qcrtc->hot_spot_x;
> > + cmd->u.set.position.y = qcrtc->cur_y + qcrtc->hot_spot_y;
> >
> > cmd->u.set.shape = qxl_bo_physical_address(qdev,
> > cursor_bo, 0);
> > @@ -441,8 +446,8 @@ static int qxl_crtc_cursor_move(struct drm_crtc
> > *crtc,
> > cmd = (struct qxl_cursor_cmd *)qxl_release_map(qdev,
> > release); cmd->type = QXL_CURSOR_MOVE;
> > - cmd->u.position.x = qcrtc->cur_x;
> > - cmd->u.position.y = qcrtc->cur_y;
> > + cmd->u.position.x = qcrtc->cur_x + qcrtc->hot_spot_x;
> > + cmd->u.position.y = qcrtc->cur_y + qcrtc->hot_spot_y;
> > qxl_release_unmap(qdev, release, &cmd->release_info);
> >
> > qxl_push_cursor_ring_release(qdev, release,
> > QXL_CMD_CURSOR, false); diff --git a/drivers/gpu/drm/qxl/qxl_drv.h
> > b/drivers/gpu/drm/qxl/qxl_drv.h index 01a8694..3ab9017 100644
> > --- a/drivers/gpu/drm/qxl/qxl_drv.h
> > +++ b/drivers/gpu/drm/qxl/qxl_drv.h
> > @@ -135,6 +135,8 @@ struct qxl_crtc {
> > int index;
> > int cur_x;
> > int cur_y;
> > + int hot_spot_x;
> > + int hot_spot_y;
> > };
> >
> > struct qxl_output {
> > --
> > 2.6.3.462.gbe2c914
> >
>
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