EXPORT_SYMBOL(drm_rect_calc_vscale);
/**
- * drm_calc_hscale_relaxed - calculate the horizontal scaling factor
- * @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).
- *
- * If the calculated scaling factor is below @min_vscale,
- * decrease the height of rectangle @dst to compensate.
- *
- * If the calculated scaling factor is above @max_vscale,
- * decrease the height of rectangle @src to compensate.
- *
- * If the scale is below 1 << 16, round down. If the scale is above
- * 1 << 16, round up. This will calculate the scale with the most
- * pessimistic limit calculation.
- *
- * RETURNS:
- * The horizontal scaling factor.
- */
-int drm_rect_calc_hscale_relaxed(struct drm_rect *src,
- struct drm_rect *dst,
- int min_hscale, int max_hscale)
-{
- int src_w = drm_rect_width(src);
- int dst_w = drm_rect_width(dst);
- int hscale = drm_calc_scale(src_w, dst_w);
-
- if (hscale < 0 || dst_w == 0)
- return hscale;
-
- if (hscale < min_hscale) {
- int max_dst_w = src_w / min_hscale;
-
- drm_rect_adjust_size(dst, max_dst_w - dst_w, 0);
-
- return min_hscale;
- }
-
- if (hscale > max_hscale) {
- int max_src_w = dst_w * max_hscale;
-
- drm_rect_adjust_size(src, max_src_w - src_w, 0);
-
- return max_hscale;
- }
-
- return hscale;
-}
-EXPORT_SYMBOL(drm_rect_calc_hscale_relaxed);
-
-/**
- * drm_rect_calc_vscale_relaxed - calculate the vertical scaling factor
- * @src: source window rectangle
- * @dst: destination window rectangle
- * @min_vscale: minimum allowed vertical scaling factor
- * @max_vscale: maximum allowed vertical scaling factor
- *
- * Calculate the vertical scaling factor as
- * (@src height) / (@dst height).
- *
- * If the calculated scaling factor is below @min_vscale,
- * decrease the height of rectangle @dst to compensate.
- *
- * If the calculated scaling factor is above @max_vscale,
- * decrease the height of rectangle @src to compensate.
- *
- * If the scale is below 1 << 16, round down. If the scale is above
- * 1 << 16, round up. This will calculate the scale with the most
- * pessimistic limit calculation.
- *
- * RETURNS:
- * The vertical scaling factor.
- */
-int drm_rect_calc_vscale_relaxed(struct drm_rect *src,
- struct drm_rect *dst,
- int min_vscale, int max_vscale)
-{
- int src_h = drm_rect_height(src);
- int dst_h = drm_rect_height(dst);
- int vscale = drm_calc_scale(src_h, dst_h);
-
- if (vscale < 0 || dst_h == 0)
- return vscale;
-
- if (vscale < min_vscale) {
- int max_dst_h = src_h / min_vscale;
-
- drm_rect_adjust_size(dst, 0, max_dst_h - dst_h);
-
- return min_vscale;
- }
-
- if (vscale > max_vscale) {
- int max_src_h = dst_h * max_vscale;
-
- drm_rect_adjust_size(src, 0, max_src_h - src_h);
-
- return max_vscale;
- }
-
- return vscale;
-}
-EXPORT_SYMBOL(drm_rect_calc_vscale_relaxed);
-
-/**
* drm_rect_debug_print - print the rectangle information
* @prefix: prefix string
* @r: rectangle to print
int drm_rect_calc_vscale(const struct drm_rect *src,
const struct drm_rect *dst,
int min_vscale, int max_vscale);
-int drm_rect_calc_hscale_relaxed(struct drm_rect *src,
- struct drm_rect *dst,
- int min_hscale, int max_hscale);
-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 char *prefix,
const struct drm_rect *r, bool fixed_point);
void drm_rect_rotate(struct drm_rect *r,