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IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #ifndef DRM_RECT_H #define DRM_RECT_H /** * DOC: rect utils * * Utility functions to help manage rectangular areas for * clipping, scaling, etc. calculations. */ /** * struct drm_rect - two dimensional rectangle * @x1: horizontal starting coordinate (inclusive) * @x2: horizontal ending coordinate (exclusive) * @y1: vertical starting coordinate (inclusive) * @y2: vertical ending coordinate (exclusive) */ struct drm_rect { int x1, y1, x2, y2; }; /** * DRM_RECT_FMT - printf string for &struct drm_rect */ #define DRM_RECT_FMT "%dx%d%+d%+d" /** * DRM_RECT_ARG - printf arguments for &struct drm_rect * @r: rectangle struct */ #define DRM_RECT_ARG(r) drm_rect_width(r), drm_rect_height(r), (r)->x1, (r)->y1 /** * DRM_RECT_FP_FMT - printf string for &struct drm_rect in 16.16 fixed point */ #define DRM_RECT_FP_FMT "%d.%06ux%d.%06u%+d.%06u%+d.%06u" /** * DRM_RECT_FP_ARG - printf arguments for &struct drm_rect in 16.16 fixed point * @r: rectangle struct * * This is useful for e.g. printing plane source rectangles, which are in 16.16 * fixed point. */ #define DRM_RECT_FP_ARG(r) \ drm_rect_width(r) >> 16, ((drm_rect_width(r) & 0xffff) * 15625) >> 10, \ drm_rect_height(r) >> 16, ((drm_rect_height(r) & 0xffff) * 15625) >> 10, \ (r)->x1 >> 16, (((r)->x1 & 0xffff) * 15625) >> 10, \ (r)->y1 >> 16, (((r)->y1 & 0xffff) * 15625) >> 10 /** * drm_rect_adjust_size - adjust the size of the rectangle * @r: rectangle to be adjusted * @dw: horizontal adjustment * @dh: vertical adjustment * * Change the size of rectangle @r by @dw in the horizontal direction, * and by @dh in the vertical direction, while keeping the center * of @r stationary. * * Positive @dw and @dh increase the size, negative values decrease it. */ static inline void drm_rect_adjust_size(struct drm_rect *r, int dw, int dh) { r->x1 -= dw >> 1; r->y1 -= dh >> 1; r->x2 += (dw + 1) >> 1; r->y2 += (dh + 1) >> 1; } /** * drm_rect_translate - translate the rectangle * @r: rectangle to be tranlated * @dx: horizontal translation * @dy: vertical translation * * Move rectangle @r by @dx in the horizontal direction, * and by @dy in the vertical direction. */ static inline void drm_rect_translate(struct drm_rect *r, int dx, int dy) { r->x1 += dx; r->y1 += dy; r->x2 += dx; r->y2 += dy; } /** * drm_rect_downscale - downscale a rectangle * @r: rectangle to be downscaled * @horz: horizontal downscale factor * @vert: vertical downscale factor * * Divide the coordinates of rectangle @r by @horz and @vert. */ static inline void drm_rect_downscale(struct drm_rect *r, int horz, int vert) { r->x1 /= horz; r->y1 /= vert; r->x2 /= horz; r->y2 /= vert; } /** * drm_rect_width - determine the rectangle width * @r: rectangle whose width is returned * * RETURNS: * The width of the rectangle. */ static inline int drm_rect_width(const struct drm_rect *r) { return r->x2 - r->x1; } /** * drm_rect_height - determine the rectangle height * @r: rectangle whose height is returned * * RETURNS: * The height of the rectangle. */ static inline int drm_rect_height(const struct drm_rect *r) { return r->y2 - r->y1; } /** * drm_rect_visible - determine if the the rectangle is visible * @r: rectangle whose visibility is returned * * RETURNS: * %true if the rectangle is visible, %false otherwise. */ static inline bool drm_rect_visible(const struct drm_rect *r) { return drm_rect_width(r) > 0 && drm_rect_height(r) > 0; } /** * drm_rect_equals - determine if two rectangles are equal * @r1: first rectangle * @r2: second rectangle * * RETURNS: * %true if the rectangles are equal, %false otherwise. */ static inline bool drm_rect_equals(const struct drm_rect *r1, const struct drm_rect *r2) { return r1->x1 == r2->x1 && r1->x2 == r2->x2 && r1->y1 == r2->y1 && r1->y2 == r2->y2; } bool drm_rect_intersect(struct drm_rect *r, const struct drm_rect *clip); bool drm_rect_clip_scaled(struct drm_rect *src, struct drm_rect *dst, const struct drm_rect *clip); int drm_rect_calc_hscale(const struct drm_rect *src, const struct drm_rect *dst, int min_hscale, int max_hscale); int drm_rect_calc_vscale(const struct drm_rect *src, const 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, int width, int height, unsigned int rotation); void drm_rect_rotate_inv(struct drm_rect *r, int width, int height, unsigned int rotation); #endif