/* * Copyright (C) 2011-2013 Intel Corporation * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  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 hscale, int vscale);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);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,		     int width, int height,		     unsigned int rotation);void drm_rect_rotate_inv(struct drm_rect *r,			 int width, int height,			 unsigned int rotation); #endif