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gdi32/emf: Add a helper to pad variable length record data.

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Nikolay Sivov 2023-11-27 08:30:36 +01:00 • committed by Alexandre Julliard
parent 9cfb95964b
commit 30be905972
1 changed files with 12 additions and 3 deletions
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15
dlls/gdi32/emfdc.c
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@ -30,6 +30,15 @@
WINE_DEFAULT_DEBUG_CHANNEL(enhmetafile);
static inline UINT aligned_size(UINT size)
{
return (size + 3) & ~3;
}
static inline void pad_record(void *record, UINT size)
{
if (size & 3) memset((char *)record + size, 0, 4 - (size & 3));
}
struct emf
{
@ -1159,7 +1168,7 @@ BOOL EMFDC_PolyDraw( DC_ATTR *dc_attr, const POINT *pts, const BYTE *types, DWOR
size = use_small_emr ? offsetof( EMRPOLYDRAW16, apts[count] )
: offsetof( EMRPOLYDRAW, aptl[count] );
size += (count + 3) & ~3;
size += aligned_size(count);
if (!(emr = HeapAlloc( GetProcessHeap(), 0, size ))) return FALSE;
@ -1169,7 +1178,7 @@ BOOL EMFDC_PolyDraw( DC_ATTR *dc_attr, const POINT *pts, const BYTE *types, DWOR
types_dest = store_points( emr->aptl, pts, count, use_small_emr );
memcpy( types_dest, types, count );
if (count & 3) memset( types_dest + count, 0, 4 - (count & 3) );
pad_record( types_dest, count );
if (!emf->path)
get_points_bounds( &emr->rclBounds, pts, count, 0 );
@ -2510,7 +2519,7 @@ BOOL WINAPI GdiComment( HDC hdc, UINT bytes, const BYTE *buffer )
if (!(dc_attr = get_dc_attr( hdc )) || !get_dc_emf( dc_attr )) return FALSE;
rounded_size = (bytes+3) & ~3;
rounded_size = aligned_size(bytes);
total = offsetof(EMRGDICOMMENT,Data) + rounded_size;
emr = HeapAlloc(GetProcessHeap(), 0, total);