[PATCH v4] drm: Add struct drm_rect and assorted utility functions

[Ville Syrjälä]

On Sat, Apr 06, 2013 at 02:00:31AM +0200, Laurent Pinchart wrote:
> Hi Ville,
> 
> Thanks for the patch.
> 
> On Friday 05 April 2013 16:19:36 ville.syrjala at linux.intel.com wrote:
> > From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> > 
> > struct drm_rect represents a simple rectangle. The utility
> > functions are there to help driver writers.
> > 
> > v2: Moved the region stuff into its own file, made the smaller funcs
> >     static inline, used 64bit maths in the scaled clipping function to
> >     avoid overflows (instead it will saturate to INT_MIN or INT_MAX).
> > v3: Renamed drm_region to drm_rect, drm_region_clip to
> >     drm_rect_intersect, and drm_region_subsample to drm_rect_downscale.
> > v4: Renamed some function parameters, improve kernel-doc comments a bit,
> >     and actually generate documentation for drm_rect.[ch].
> > 
> > Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> > ---
> >  Documentation/DocBook/drm.tmpl |   2 +
> >  drivers/gpu/drm/Makefile       |   3 +-
> >  drivers/gpu/drm/drm_rect.c     |  96 ++++++++++++++++++++++++++++++
> >  include/drm/drm_rect.h         | 132 ++++++++++++++++++++++++++++++++++++++
> >  4 files changed, 232 insertions(+), 1 deletion(-)
> >  create mode 100644 drivers/gpu/drm/drm_rect.c
> >  create mode 100644 include/drm/drm_rect.h
> 
> [snip]
> 
> > diff --git a/drivers/gpu/drm/drm_rect.c b/drivers/gpu/drm/drm_rect.c
> > new file mode 100644
> > index 0000000..a9861bd
> > --- /dev/null
> > +++ b/drivers/gpu/drm/drm_rect.c
> 
> [snip]
> 
> > +/**
> > + * drm_rect_clip_scaled - perform a scaled clip operation
> > + * @src: source window rectangle
> > + * @dst: destination window rectangle
> > + * @clip: clip rectangle
> > + * @hscale: horizontal scaling factor
> > + * @vscale: vertical scaling factor
> > + *
> > + * Clip rectangle @dst by rectangle @clip. Clip rectangle @src by the
> > + * same amounts multiplied by @hscale and @vscale.
> > + *
> > + * RETUTRNS:
> 
> s/RETUTRNS/RETURNS/

Fixed.

> 
> > + * %true if rectangle @dst is still visible after being clipped,
> > + * %false otherwise
> > + */
> 
> Otherwise,
> 
> Reviewed-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>

Thank you very much.

-- 
Ville Syrjälä
Intel OTC