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Solve alignment problems by converting bitmap headers *after* they 

have been copied into an aligned location, and then copying the
converted header back over the original header.
This commit is contained in:
Warren Baird 2002-05-04 18:26:34 +00:00 committed by Alexandre Julliard
parent d3cbb2ed76
commit 714bfd7e4a
1 changed files with 18 additions and 7 deletions
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25
tools/wrc/newstruc.c
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@ -228,6 +228,7 @@ static int convert_bitmap(char *data, int size)
BITMAPINFOHEADER *bih = (BITMAPINFOHEADER *)data;
BITMAPV4HEADER *b4h = (BITMAPV4HEADER *)data;
int type = 0;
int returnSize = 0; /* size to be returned */
#ifdef WORDS_BIGENDIAN
DWORD bisizel = BYTESWAP_DWORD(sizeof(BITMAPINFOHEADER));
DWORD b4sizel = BYTESWAP_DWORD(sizeof(BITMAPV4HEADER));
@ -240,17 +241,24 @@ static int convert_bitmap(char *data, int size)
DWORD b4sizeb = BYTESWAP_DWORD(sizeof(BITMAPV4HEADER));
#endif
/*
* Originally the bih and b4h pointers were simply incremented here,
* and memmoved at the end of the function. This causes alignment
* issues on solaris, so we do the memmove here rather than at the end.
*/
if(data[0] == 'B' && data[1] == 'M')
{
/* Little endian signature */
bih = (BITMAPINFOHEADER *)(data + sizeof(BITMAPFILEHEADER));
b4h = (BITMAPV4HEADER *)(data + sizeof(BITMAPFILEHEADER));
memmove(data, data+sizeof(BITMAPFILEHEADER), size - sizeof(BITMAPFILEHEADER));
returnSize = sizeof(BITMAPFILEHEADER);
}
else if(data[0] == 'M' && data[1] == 'B')
{
type |= FL_SIGBE; /* Big endian signature */
bih = (BITMAPINFOHEADER *)(data + sizeof(BITMAPFILEHEADER));
b4h = (BITMAPV4HEADER *)(data + sizeof(BITMAPFILEHEADER));
memmove(data, data+sizeof(BITMAPFILEHEADER), size - sizeof(BITMAPFILEHEADER));
returnSize = sizeof(BITMAPFILEHEADER);
}
if(bih->biSize == bisizel)
@ -323,7 +331,7 @@ static int convert_bitmap(char *data, int size)
memmove(data, data+sizeof(BITMAPFILEHEADER), size - sizeof(BITMAPFILEHEADER));
return sizeof(BITMAPFILEHEADER);
}
return 0;
return returnSize;
}
#undef FL_SIGBE
#undef FL_SIZEBE
@ -423,8 +431,10 @@ static void split_icons(raw_data_t *rd, icon_group_t *icog, int *nico)
ico->nclr = ide.nclr;
ico->planes = swap ? BYTESWAP_WORD(ide.planes) : ide.planes;
ico->bits = swap ? BYTESWAP_WORD(ide.bits) : ide.bits;
convert_bitmap((char *)rd->data + ide.offset, 0);
memcpy(&info, rd->data + ide.offset, sizeof(info));
convert_bitmap((char *) &info, 0);
memcpy(rd->data + ide.offset, &info, sizeof(info));
if(!ico->planes)
{
/* Argh! They did not fill out the resdir structure */
@ -513,8 +523,9 @@ static void split_cursors(raw_data_t *rd, cursor_group_t *curg, int *ncur)
cur->width = cde.width;
cur->height = cde.height;
cur->nclr = cde.nclr;
convert_bitmap((char *)rd->data + cde.offset, 0);
memcpy(&info, rd->data + cde.offset, sizeof(info));
convert_bitmap((char *)&info, 0);
memcpy(rd->data + cde.offset, &info, sizeof(info));
/* The bitmap is in destination byteorder. We want native for our structures */
switch(byteorder)
{