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comctl32: Simplify the DIB byte width computation.

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This commit is contained in:
Alexandre Julliard 2011-08-29 12:03:27 +02:00
parent 8cf6424057
commit bd3b0e4f70
2 changed files with 2 additions and 47 deletions
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30
dlls/comctl32/imagelist.c
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@ -2060,34 +2060,6 @@ ImageList_Merge (HIMAGELIST himl1, INT i1, HIMAGELIST himl2, INT i2,
}
/***********************************************************************
* DIB_GetDIBWidthBytes
*
* Return the width of a DIB bitmap in bytes. DIB bitmap data is 32-bit aligned.
*/
static int DIB_GetDIBWidthBytes( int width, int depth )
{
int words;
switch(depth)
{
case 1: words = (width + 31) / 32; break;
case 4: words = (width + 7) / 8; break;
case 8: words = (width + 3) / 4; break;
case 15:
case 16: words = (width + 1) / 2; break;
case 24: words = (width * 3 + 3)/4; break;
default:
WARN("(%d): Unsupported depth\n", depth );
/* fall through */
case 32:
words = width;
break;
}
return 4 * words;
}
/***********************************************************************
* DIB_GetDIBImageBytes
*
@ -2095,7 +2067,7 @@ static int DIB_GetDIBWidthBytes( int width, int depth )
*/
static int DIB_GetDIBImageBytes( int width, int height, int depth )
{
return DIB_GetDIBWidthBytes( width, depth ) * abs( height );
return (((width * depth + 31) / 8) & ~3) * abs( height );
}

19
dlls/comctl32/tests/imagelist.c
View File

@ -738,24 +738,7 @@ static struct my_IStream Test_Stream = { { &Test_Stream_Vtbl }, 0, 0 };
static INT DIB_GetWidthBytes( int width, int bpp )
{
int words;
switch (bpp)
{
case 1: words = (width + 31) / 32; break;
case 4: words = (width + 7) / 8; break;
case 8: words = (width + 3) / 4; break;
case 15:
case 16: words = (width + 1) / 2; break;
case 24: words = (width * 3 + 3)/4; break;
case 32: words = width; break;
default:
trace("Unknown depth %d, please report.\n", bpp );
assert(0);
return -1;
}
return 4 * words;
return ((width * bpp + 31) / 8) & ~3;
}
static void check_bitmap_data(const char *bm_data, ULONG bm_data_size,