/*
* 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
#include <linux/types.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 )
*
* Note that this must match the layout of struct drm_mode_rect or the damage
* helpers like drm_atomic_helper_damage_iter_init ( ) break .
*/
struct drm_rect {
int x1, y1, x2, y2;
};
/**
* DRM_RECT_INIT - initialize a rectangle from x / y / w / h
* @ x : x coordinate
* @ y : y coordinate
* @ w : width
* @ h : height
*
* RETURNS :
* A new rectangle of the specified size .
*/
#define DRM_RECT_INIT(x, y, w, h) ((struct drm_rect){ \
.x1 = (x), \
.y1 = (y), \
.x2 = (x) + (w), \
.y2 = (y) + (h) })
/**
* 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) & 0 xffff) * 15625 ) >> 10 , \
drm_rect_height(r) >> 16 , ((drm_rect_height(r) & 0 xffff) * 15625 ) >> 10 , \
(r)->x1 >> 16 , (((r)->x1 & 0 xffff) * 15625 ) >> 10 , \
(r)->y1 >> 16 , (((r)->y1 & 0 xffff) * 15625 ) >> 10
/**
* drm_rect_init - initialize the rectangle from x / y / w / h
* @ r : rectangle
* @ x : x coordinate
* @ y : y coordinate
* @ width : width
* @ height : height
*/
static inline void drm_rect_init(struct drm_rect *r, int x, int y,
int width, int height)
{
r->x1 = x;
r->y1 = y;
r->x2 = x + width;
r->y2 = y + height;
}
/**
* 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 translated
* @ 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_translate_to - translate the rectangle to an absolute position
* @ r : rectangle to be translated
* @ x : horizontal position
* @ y : vertical position
*
* Move rectangle @ r to @ x in the horizontal direction ,
* and to @ y in the vertical direction .
*/
static inline void drm_rect_translate_to(struct drm_rect *r, int x, int y)
{
drm_rect_translate(r, x - r->x1, y - r->y1);
}
/**
* 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 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;
}
/**
* drm_rect_fp_to_int - Convert a rect in 16 . 16 fixed point form to int form .
* @ dst : rect to be stored the converted value
* @ src : rect in 16 . 16 fixed point form
*/
static inline void drm_rect_fp_to_int(struct drm_rect *dst,
const struct drm_rect *src)
{
drm_rect_init(dst, src->x1 >> 16 , src->y1 >> 16 ,
drm_rect_width(src) >> 16 ,
drm_rect_height(src) >> 16 );
}
/**
* drm_rect_overlap - Check if two rectangles overlap
* @ a : first rectangle
* @ b : second rectangle
*
* RETURNS :
* % true if the rectangles overlap , % false otherwise .
*/
static inline bool drm_rect_overlap(const struct drm_rect *a,
const struct drm_rect *b)
{
return (a->x2 > b->x1 && b->x2 > a->x1 &&
a->y2 > b->y1 && b->y2 > a->y1);
}
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
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