1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
**
** $Id: $
** $Revision: $
**
** $Filename: GetBMHD.S $
** $Author: Christian A. Weber $
** $Release: 19.1 $
** $Date: 92/05/11 21:11:27 $
**
** iff.library/IFFLib_GetBMHD
**
** COPYRIGHT (C) 1987-1992 BY CHRISTIAN A. WEBER, BRUGGERWEG 2,
** CH-8037 ZUERICH, SWITZERLAND. ALL RIGHTS RESERVED. NO PART
** OF THIS SOFTWARE MAY BE COPIED, REPRODUCED, OR TRANSMITTED
** IN ANY FORM OR BY ANY MEANS, WITHOUT THE PRIOR WRITTEN PER-
** MISSION OF THE AUTHOR. USE AT YOUR OWN RISK.
**
IDNT IFFLib_GetBMHD
SECTION text,CODE
INCLUDE "IffLib.i"
XREF SetError,ClearError,FindChunkFunc
XDEF GetBMHDFunc
******* iff.library/IFFLib_GetBMHD ******************************************
*
* NAME
* IFFLib_GetBMHD -- find a BitMapHeader of an IFF-file
*
* SYNOPSIS
* header = IFFLib_GetBMHD( ifffile )
* D0 A1
*
* struct BitMapHeader *IFFLib_GetBMHD( IFFFILE )
*
* FUNCTION
* Returns a pointer to a 'BitMapHeader' structure as defined in
* iff.h and iff.i
*
* INPUTS
* ifffile - IFF file pointer, returned by IFFLib_OpenIFF()
*
* RESULTS
* Pointer to the BitMapHeader, or NULL if no BMHD chunk found
*
* SEE ALSO
* IFFLib_FindChunk(), IFFLib_GetColorTab()
*
*****************************************************************************
GetBMHDFunc: movem.l d2/a5-a6,-(SP)
movea.l a6,a5 ; IFFBase für ClearError()
move.l #'BMHD',d0
bsr FindChunkFunc ; setzt Z-Flag wenn not found
bne.s 1$ ; Chunk gefunden --->
moveq.l #IFF_NOBMHD,d0
bsr SetError
bra.s 99$
1$:
addq.l #8,d0 ; BMHD.... überspringen
move.l d0,d2
bsr ClearError
move.l d2,d0
99$: movem.l (SP)+,d2/a5-a6
rts
END
|
