drm_rect_calc_hscale (9)

int drm_rect_calc_hscale(const struct drm_rect * src, const struct drm_rect * dst, int min_hscale, int max_hscale);

src

source window rectangle

dst

destination window rectangle

min_hscale

minimum allowed horizontal scaling factor

max_hscale

maximum allowed horizontal scaling factor

Calculate the horizontal scaling factor as (src width) / (dst width).

The horizontal scaling factor, or errno of out of limits.

Jesse Barnes <[email protected]>

Intel Corporation,

Initial version

Laurent Pinchart <[email protected]>

Ideas on board SPRL,

Driver internals

Daniel Vetter <[email protected]>

Intel Corporation,

Contributions all over the place