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comctl32: Switch to a Nx4 tiling.

This commit is contained in:
Mike McCormack 2006-11-05 18:02:39 +09:00 committed by Alexandre Julliard
parent 6772873396
commit dfb41b35c4
1 changed files with 39 additions and 8 deletions
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47
dlls/comctl32/imagelist.c
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@ -84,28 +84,59 @@ static inline BOOL is_valid(HIMAGELIST himl)
return himl && himl->magic == IMAGELIST_MAGIC;
}
/*
* An imagelist with N images is tiled like this:
*
* N/4 ->
*
* 4 048C..
* 159D..
* | 26AE.N
* V 37BF.
*/
#define TILE_COUNT 4
static inline UINT imagelist_width( UINT count )
{
return ((count + TILE_COUNT - 1)/TILE_COUNT);
}
static inline void imagelist_point_from_index( HIMAGELIST himl, UINT index, LPPOINT pt )
{
pt->x = index * himl->cx;
pt->y = 0;
pt->x = (index/TILE_COUNT) * himl->cx;
pt->y = (index%TILE_COUNT) * himl->cy;
}
static inline void imagelist_get_bitmap_size( HIMAGELIST himl, UINT count, UINT cy, SIZE *sz )
{
sz->cx = count * himl->cx;
sz->cy = cy;
sz->cx = imagelist_width( count ) * himl->cx;
sz->cy = cy*TILE_COUNT;
}
/*
* imagelist_copy_images()
*
* Copies a block of count images from offset src in the list to offset dest.
* Images are copied a row at at time. Assumes hdcSrc and hdcDest are different.
*/
static inline void imagelist_copy_images( HIMAGELIST himl, HDC hdcSrc, HDC hdcDest,
UINT src, UINT count, UINT dest )
{
POINT ptSrc, ptDest;
SIZE sz;
UINT i;
imagelist_point_from_index( himl, src, &ptSrc );
imagelist_point_from_index( himl, dest, &ptDest );
imagelist_get_bitmap_size( himl, count, himl->cy, &sz );
BitBlt (hdcDest, ptSrc.x, ptSrc.y, sz.cx, sz.cy, hdcSrc, ptDest.x, ptDest.y, SRCCOPY);
for ( i=0; i<TILE_COUNT; i++ )
{
imagelist_point_from_index( himl, src+i, &ptSrc );
imagelist_point_from_index( himl, dest+i, &ptDest );
sz.cx = himl->cx * imagelist_width( count - i );
sz.cy = himl->cy;
BitBlt( hdcDest, ptDest.x, ptDest.y, sz.cx, sz.cy,
hdcSrc, ptSrc.x, ptSrc.y, SRCCOPY );
}
}
/*************************************************************************