bool WRAPI WRCreateIconHeader( BYTE *data, uint_32 size, WORD type,
ICONHEADER **ih, uint_32 *ihsize )
{
BITMAPINFOHEADER *bih;
WORD count;
uint_32 pos;
int i;
if( data == NULL || size == 0 || ih == NULL || ihsize == NULL ) {
return( false );
}
count = WRCountIconImages( data, size );
if( count == 0 ) {
return( false );
}
*ihsize = sizeof( ICONHEADER ) + sizeof( ICONDIRENTRY ) * (count - 1);
*ih = MemAlloc( *ihsize );
if( *ih == NULL ) {
return( false );
}
(*ih)->idReserved = 0;
(*ih)->idType = type;
(*ih)->idCount = count;
for( i = 0, pos = 0; i < count; i++ ) {
bih = (BITMAPINFOHEADER *)(data + pos);
(*ih)->idEntries[i].bWidth = bih->biWidth;
(*ih)->idEntries[i].bHeight = bih->biHeight / 2;
if( type == 1 ) {
(*ih)->idEntries[i].bColorCount = 1 << bih->biBitCount;
} else {
(*ih)->idEntries[i].bColorCount = 0;
}
(*ih)->idEntries[i].bReserved = 0;
(*ih)->idEntries[i].wPlanes = bih->biPlanes;
(*ih)->idEntries[i].wBitCount = bih->biBitCount;
(*ih)->idEntries[i].dwBytesInRes = WRSizeOfImage( bih );
if( i == 0 ) {
(*ih)->idEntries[i].dwImageOffset = *ihsize;
} else {
(*ih)->idEntries[i].dwImageOffset = (*ih)->idEntries[i - 1].dwImageOffset +
(*ih)->idEntries[i - 1].dwBytesInRes;
}
pos += (*ih)->idEntries[i].dwBytesInRes;
}
return( true );
}
// This function assumes that the data represents icon data WITHOUT
// an icon directory
WORD WRECountIconImages( BYTE *data, uint_32 size )
{
BITMAPINFOHEADER *bih;
WORD count;
uint_32 pos;
pos = 0;
count = 0;
while( pos < size ) {
bih = (BITMAPINFOHEADER *)(data + pos);
count++;
pos += WRSizeOfImage( bih );
// if we overrun do not count this block
if( pos > size ) {
count--;
}
}
return( count );
}
