/usr/include/directfb/directfb_util.h is in libdirectfb-dev 1.2.10.0-4.3ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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(c) Copyright 2001-2008 The world wide DirectFB Open Source Community (directfb.org)
(c) Copyright 2000-2004 Convergence (integrated media) GmbH
All rights reserved.
Written by Denis Oliver Kropp <dok@directfb.org>,
Andreas Hundt <andi@fischlustig.de>,
Sven Neumann <neo@directfb.org>,
Ville Syrjälä <syrjala@sci.fi> and
Claudio Ciccani <klan@users.sf.net>.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#ifndef __DIRECTFB_UTIL_H__
#define __DIRECTFB_UTIL_H__
#include <stdlib.h>
#include <errno.h>
#include <directfb.h>
#ifdef __cplusplus
extern "C"
{
#endif
#include <directfb_strings.h>
#include <direct/types.h>
#include <direct/debug.h>
bool dfb_region_intersect( DFBRegion *region,
int x1, int y1, int x2, int y2 );
bool dfb_region_region_intersect( DFBRegion *region,
const DFBRegion *clip );
bool dfb_region_rectangle_intersect( DFBRegion *region,
const DFBRectangle *rect );
bool dfb_unsafe_region_intersect( DFBRegion *region,
int x1, int y1, int x2, int y2 );
bool dfb_unsafe_region_rectangle_intersect( DFBRegion *region,
const DFBRectangle *rect );
bool dfb_rectangle_intersect_by_unsafe_region( DFBRectangle *rectangle,
DFBRegion *region );
bool dfb_rectangle_intersect_by_region( DFBRectangle *rectangle,
const DFBRegion *region );
bool dfb_rectangle_intersect( DFBRectangle *rectangle,
const DFBRectangle *clip );
/* returns the result in the first rectangle */
void dfb_rectangle_union ( DFBRectangle *rect1,
const DFBRectangle *rect2 );
#define DFB_RECTANGLE_ASSERT(r) \
do { \
D_ASSERT( (r) != NULL ); \
D_ASSERT( (r)->w >= 0 ); \
D_ASSERT( (r)->h >= 0 ); \
} while (0)
#define DFB_RECTANGLE_ASSERT_IF(r) \
do { \
if ((r) != NULL) { \
D_ASSERT( (r)->w >= 0 ); \
D_ASSERT( (r)->h >= 0 ); \
} \
} while (0)
#define DFB_RECTANGLE_VALS(r) (r)->x, (r)->y, (r)->w, (r)->h
#define DFB_RECTANGLE_VALS_FROM_REGION(r) (r)->x1, (r)->y1, (r)->x2-(r)->x1+1, (r)->y2-(r)->y1+1
#define DFB_RECTANGLE_INIT_FROM_REGION(r) (DFBRectangle){ DFB_RECTANGLE_VALS_FROM_REGION(r) }
#define DFB_RECTANGLE_CONTAINS_POINT(r,X,Y) (((X) >= (r)->x) && ((X) < (r)->x + (r)->w) && \
((Y) >= (r)->y) && ((Y) < (r)->y + (r)->h))
#define DFB_RECTANGLES_DEBUG_AT( Domain, rects, num ) \
do { \
unsigned int i; \
\
for (i=0; i<(num); i++) \
D_DEBUG_AT( Domain, " -> [%2d] %4d,%4d-%4dx%4d\n", i, DFB_RECTANGLE_VALS(&(rects)[i]) ); \
} while (0)
#define DFB_TRIANGLE_VALS(t) (t)->x1, (t)->y1, (t)->x2, (t)->y2, (t)->x3, (t)->y3
#define DFB_COLORKEY_VALS(c) (c)->r, (c)->g, (c)->b, (c)->index
#define DFB_REGION_CHECK(r) \
((r) != NULL && \
(r)->x1 <= (r)->x2 && \
(r)->y1 <= (r)->y2)
#define DFB_REGION_CHECK_IF(r) \
((r) == NULL || \
((r)->x1 <= (r)->x2 && \
(r)->y1 <= (r)->y2))
#define DFB_REGION_ASSERT(r) \
do { \
D_ASSERT( (r) != NULL ); \
D_ASSERT( (r)->x1 <= (r)->x2 ); \
D_ASSERT( (r)->y1 <= (r)->y2 ); \
} while (0)
#define DFB_REGION_ASSERT_IF(r) \
do { \
if ((r) != NULL) { \
D_ASSERT( (r)->x1 <= (r)->x2 ); \
D_ASSERT( (r)->y1 <= (r)->y2 ); \
} \
} while (0)
#define DFB_REGION_VALS(r) (r)->x1, (r)->y1, (r)->x2, (r)->y2
#define DFB_REGION_VALS_FROM_DIMENSION(d) 0, 0, (d)->w-1, (d)->h-1
#define DFB_REGION_INIT_FROM_DIMENSION(d) (DFBRegion){ DFB_REGION_VALS_FROM_DIMENSION(d) }
#define DFB_REGION_VALS_FROM_RECTANGLE(r) (r)->x, (r)->y, (r)->x+(r)->w-1, (r)->y+(r)->h-1
#define DFB_REGION_INIT_FROM_RECTANGLE(r) (DFBRegion){ DFB_REGION_VALS_FROM_RECTANGLE(r) }
#define DFB_REGION_VALS_FROM_RECTANGLE_VALS(x,y,w,h) (x), (y), (x)+(w)-1, (y)+(h)-1
#define DFB_REGION_INIT_FROM_RECTANGLE_VALS(x,y,w,h) (DFBRegion){ DFB_REGION_VALS_FROM_RECTANGLE_VALS(x,y,w,h) }
#define DFB_REGION_VALS_TRANSLATED(r,x,y) (r)->x1 + x, (r)->y1 + y, (r)->x2 + x, (r)->y2 + y
#define DFB_REGION_INIT_TRANSLATED(r,x,y) (DFBRegion){ DFB_REGION_VALS_TRANSLATED(r,x,y) }
#define DFB_REGION_VALS_INTERSECTED(r,X1,Y1,X2,Y2) (r)->x1 > (X1) ? (r)->x1 : (X1), \
(r)->y1 > (Y1) ? (r)->y1 : (Y1), \
(r)->x2 < (X2) ? (r)->x2 : (X2), \
(r)->y2 < (Y2) ? (r)->y2 : (Y2)
#define DFB_REGION_INIT_INTERSECTED(r,X1,Y1,X2,Y2) (DFBRegion){ DFB_REGION_VALS_INTERSECTED(r,X1,Y1,X2,Y2) }
#define DFB_REGION_CONTAINS_POINT(r,X,Y) (((X) >= (r)->x1) && ((X) <= (r)->x2) && \
((Y) >= (r)->y1) && ((Y) <= (r)->y2))
static inline void dfb_rectangle_from_region( DFBRectangle *rect,
const DFBRegion *region )
{
D_ASSERT( rect != NULL );
DFB_REGION_ASSERT( region );
rect->x = region->x1;
rect->y = region->y1;
rect->w = region->x2 - region->x1 + 1;
rect->h = region->y2 - region->y1 + 1;
}
static inline void dfb_rectangle_from_rectangle_plus_insets( DFBRectangle *rect,
const DFBRectangle *inner,
const DFBInsets *insets )
{
D_ASSERT( rect != NULL );
D_ASSERT( insets != NULL );
DFB_RECTANGLE_ASSERT( inner );
rect->x = inner->x - insets->l;
rect->y = inner->y - insets->t;
rect->w = inner->w + insets->l + insets->r;
rect->h = inner->h + insets->t + insets->b;
}
static inline void dfb_region_from_rectangle( DFBRegion *region,
const DFBRectangle *rect )
{
D_ASSERT( region != NULL );
DFB_RECTANGLE_ASSERT( rect );
D_ASSERT( rect->w > 0 );
D_ASSERT( rect->h > 0 );
region->x1 = rect->x;
region->y1 = rect->y;
region->x2 = rect->x + rect->w - 1;
region->y2 = rect->y + rect->h - 1;
}
static inline void dfb_rectangle_translate( DFBRectangle *rect,
int dx,
int dy )
{
DFB_RECTANGLE_ASSERT( rect );
rect->x += dx;
rect->y += dy;
}
static inline void dfb_region_translate( DFBRegion *region,
int dx,
int dy )
{
DFB_REGION_ASSERT( region );
region->x1 += dx;
region->y1 += dy;
region->x2 += dx;
region->y2 += dy;
}
static inline void dfb_rectangle_resize( DFBRectangle *rect,
int width,
int height )
{
DFB_RECTANGLE_ASSERT( rect );
D_ASSERT( width >= 0 );
D_ASSERT( height >= 0 );
rect->w = width;
rect->h = height;
}
static inline void dfb_region_resize( DFBRegion *region,
int width,
int height )
{
DFB_REGION_ASSERT( region );
D_ASSERT( width >= 0 );
D_ASSERT( height >= 0 );
region->x2 = region->x1 + width - 1;
region->y2 = region->y1 + height - 1;
}
static inline bool dfb_region_intersects( const DFBRegion *region,
int x1,
int y1,
int x2,
int y2 )
{
DFB_REGION_ASSERT( region );
D_ASSERT( x1 <= x2 );
D_ASSERT( y1 <= y2 );
return (region->x1 <= x2 &&
region->y1 <= y2 &&
region->x2 >= x1 &&
region->y2 >= y1);
}
static inline bool dfb_region_region_intersects( const DFBRegion *region,
const DFBRegion *other )
{
DFB_REGION_ASSERT( region );
DFB_REGION_ASSERT( other );
return (region->x1 <= other->x2 &&
region->y1 <= other->y2 &&
region->x2 >= other->x1 &&
region->y2 >= other->y1);
}
static inline bool dfb_region_region_extends( const DFBRegion *a,
const DFBRegion *b )
{
if (a->x1 == b->x1 && a->x2 == b->x2)
return (a->y1 == b->y2 - 1) || (a->y2 == b->y1 - 1);
if (a->y1 == b->y1 && a->y2 == b->y2)
return (a->x1 == b->x2 - 1) || (a->x2 == b->x1 - 1);
return false;
}
static inline void dfb_region_region_union( DFBRegion *region,
const DFBRegion *other )
{
DFB_REGION_ASSERT( region );
DFB_REGION_ASSERT( other );
if (region->x1 > other->x1)
region->x1 = other->x1;
if (region->y1 > other->y1)
region->y1 = other->y1;
if (region->x2 < other->x2)
region->x2 = other->x2;
if (region->y2 < other->y2)
region->y2 = other->y2;
}
static inline bool dfb_rectangle_region_intersects( const DFBRectangle *rect,
const DFBRegion *region )
{
DFB_RECTANGLE_ASSERT( rect );
DFB_REGION_ASSERT( region );
return (rect->x <= region->x2 &&
rect->y <= region->y2 &&
rect->x + rect->w > region->x1 &&
rect->y + rect->h > region->y1);
}
static inline void dfb_region_clip( DFBRegion *region,
int x1,
int y1,
int x2,
int y2 )
{
DFB_REGION_ASSERT( region );
D_ASSERT( dfb_region_intersects( region, x1, y1, x2, y2 ) );
if (region->x1 < x1)
region->x1 = x1;
if (region->y1 < y1)
region->y1 = y1;
if (region->x2 > x2)
region->x2 = x2;
if (region->y2 > y2)
region->y2 = y2;
}
static inline void dfb_rectangle_subtract( DFBRectangle *rect,
const DFBInsets *insets )
{
D_ASSERT( rect != NULL );
D_ASSERT( insets != NULL );
rect->x += insets->l;
rect->y += insets->t;
rect->w -= insets->l + insets->r;
rect->h -= insets->t + insets->b;
if (rect->w <= 0 || rect->h <= 0)
rect->w = rect->h = 0;
}
/*
* Compute line segment intersection.
* Return true if intersection point exists within the given segment.
*/
static inline bool dfb_line_segment_intersect( const DFBRegion *line,
const DFBRegion *seg,
int *x,
int *y )
{
int x1, x2, x3, x4;
int y1, y2, y3, y4;
int num, den;
D_ASSERT( line != NULL );
D_ASSERT( seg != NULL );
x1 = seg->x1; y1 = seg->y1; x2 = seg->y2; y2 = seg->y2;
x3 = line->x1; y3 = line->y1; x4 = line->x2; y4 = line->y2;
num = (x4 - x3) * (y1 - y3) - (y4 - y3) * (x1 - x3);
den = (y4 - y3) * (x2 - x1) - (x4 - x3) * (y2 - y1);
if (!den) /* parallel */
return false;
if (num && ((num < 0) != (den < 0) || abs(num) > abs(den))) /* not within segment */
return false;
if (x)
*x = (s64)(x2 - x1) * num / den + x1;
if (y)
*y = (s64)(y2 - y1) * num / den + y1;
return true;
}
/*
* Copied declaration of DFBPixelFormatName from directfb_strings.h
*/
extern const struct DFBPixelFormatName dfb_pixelformat_names[];
const char *dfb_input_event_type_name ( DFBInputEventType type );
const char *dfb_pixelformat_name ( DFBSurfacePixelFormat format );
const char *dfb_window_event_type_name( DFBWindowEventType type );
typedef struct {
int magic;
DFBRegion *regions;
int max_regions;
int num_regions;
DFBRegion bounding;
} DFBUpdates;
void dfb_updates_init( DFBUpdates *updates,
DFBRegion *regions,
int max_regions );
void dfb_updates_add ( DFBUpdates *updates,
const DFBRegion *region );
void dfb_updates_stat( DFBUpdates *updates,
int *ret_total,
int *ret_bounding );
static inline void
dfb_updates_reset( DFBUpdates *updates )
{
D_MAGIC_ASSERT( updates, DFBUpdates );
updates->num_regions = 0;
}
static inline void
dfb_updates_deinit( DFBUpdates *updates )
{
D_MAGIC_ASSERT( updates, DFBUpdates );
D_MAGIC_CLEAR( updates );
}
#ifdef __cplusplus
}
#endif
#endif
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