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gdi32: Add a small rectangle buffer to reduce memory allocation. 

Signed-off-by: Huw Davies <huw@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Huw Davies 2016-07-18 11:32:27 +01:00 committed by Alexandre Julliard
parent 01c33fb983
commit af5014f4c8
2 changed files with 36 additions and 15 deletions
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2
dlls/gdi32/gdi_private.h
View File

@ -355,12 +355,14 @@ extern BOOL add_rect_to_region( HRGN rgn, const RECT *rect ) DECLSPEC_HIDDEN;
extern INT mirror_region( HRGN dst, HRGN src, INT width ) DECLSPEC_HIDDEN;
extern BOOL REGION_FrameRgn( HRGN dest, HRGN src, INT x, INT y ) DECLSPEC_HIDDEN;
#define RGN_DEFAULT_RECTS 4
typedef struct
{
INT size;
INT numRects;
RECT *rects;
RECT extents;
RECT rects_buf[RGN_DEFAULT_RECTS];
} WINEREGION;
/* return the region data without making a copy */

49
dlls/gdi32/region.c
View File

@ -131,8 +131,17 @@ static BOOL grow_region( WINEREGION *rgn, int size )
if (size <= rgn->size) return TRUE;
new_rects = HeapReAlloc( GetProcessHeap(), 0, rgn->rects, size * sizeof(RECT) );
if (!new_rects) return FALSE;
if (rgn->rects == rgn->rects_buf)
{
new_rects = HeapAlloc( GetProcessHeap(), 0, size * sizeof(RECT) );
if (!new_rects) return FALSE;
memcpy( new_rects, rgn->rects, rgn->numRects * sizeof(RECT) );
}
else
{
new_rects = HeapReAlloc( GetProcessHeap(), 0, rgn->rects, size * sizeof(RECT) );
if (!new_rects) return FALSE;
}
rgn->rects = new_rects;
rgn->size = size;
return TRUE;
@ -406,9 +415,6 @@ static BOOL REGION_SubtractRegion(WINEREGION *d, WINEREGION *s1, WINEREGION *s2)
static BOOL REGION_XorRegion(WINEREGION *d, WINEREGION *s1, WINEREGION *s2);
static BOOL REGION_UnionRectWithRegion(const RECT *rect, WINEREGION *rgn);
#define RGN_DEFAULT_RECTS 2
/***********************************************************************
* get_region_type
*/
@ -445,7 +451,16 @@ static void REGION_DumpRegion(WINEREGION *pReg)
*/
static BOOL init_region( WINEREGION *pReg, INT n )
{
if (!(pReg->rects = HeapAlloc(GetProcessHeap(), 0, n * sizeof( RECT )))) return FALSE;
n = max( n, RGN_DEFAULT_RECTS );
if (n > RGN_DEFAULT_RECTS)
{
if (!(pReg->rects = HeapAlloc( GetProcessHeap(), 0, n * sizeof( RECT ) )))
return FALSE;
}
else
pReg->rects = pReg->rects_buf;
pReg->size = n;
empty_region(pReg);
return TRUE;
@ -456,7 +471,8 @@ static BOOL init_region( WINEREGION *pReg, INT n )
*/
static void destroy_region( WINEREGION *pReg )
{
HeapFree( GetProcessHeap(), 0, pReg->rects );
if (pReg->rects != pReg->rects_buf)
HeapFree( GetProcessHeap(), 0, pReg->rects );
}
/***********************************************************************
@ -491,12 +507,16 @@ static WINEREGION *alloc_region( INT n )
static inline void move_rects( WINEREGION *dst, WINEREGION *src )
{
destroy_region( dst );
dst->rects = src->rects;
if (src->rects == src->rects_buf)
{
dst->rects = dst->rects_buf;
memcpy( dst->rects, src->rects, src->numRects * sizeof(RECT) );
}
else
dst->rects = src->rects;
dst->size = src->size;
dst->numRects = src->numRects;
src->rects = NULL;
src->size = 0;
src->numRects = 0;
init_region( src, 0 );
}
/***********************************************************************
@ -1176,10 +1196,9 @@ static BOOL REGION_UnionRectWithRegion(const RECT *rect, WINEREGION *rgn)
{
WINEREGION region;
region.rects = &region.extents;
init_region( &region, 1 );
region.numRects = 1;
region.size = 1;
region.extents = *rect;
region.extents = *region.rects = *rect;
return REGION_UnionRegion(rgn, rgn, &region);
}
@ -1625,7 +1644,7 @@ static INT REGION_Coalesce (
*/
static void REGION_compact( WINEREGION *reg )
{
if ((reg->numRects < reg->size / 2) && (reg->numRects > 2))
if ((reg->numRects < reg->size / 2) && (reg->numRects > RGN_DEFAULT_RECTS))
{
RECT *new_rects = HeapReAlloc( GetProcessHeap(), 0, reg->rects, reg->numRects * sizeof(RECT) );
if (new_rects)