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drm: Add drm_rect rotation functions

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Add some helper functions to move drm_rects between different rotated
coordinate spaces. One function does the forward transform and
another does the inverse.

Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Acked-by: Dave Airlie <airlied@linux.ie>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ville Syrjälä
2014-07-08 10:31:55 +05:30
committed by Daniel Vetter
parent a4969dd787
commit 07074006cd
2 changed files with 146 additions and 0 deletions
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6
include/drm/drm_rect.h
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@@ -163,5 +163,11 @@ int drm_rect_calc_vscale_relaxed(struct drm_rect *src,
struct drm_rect *dst,
int min_vscale, int max_vscale);
void drm_rect_debug_print(const struct drm_rect *r, bool fixed_point);
void drm_rect_rotate(struct drm_rect *r,
int width, int height,
unsigned int rotation);
void drm_rect_rotate_inv(struct drm_rect *r,
int width, int height,
unsigned int rotation);
#endif