Initial import of the CDE 2.1.30 sources from the Open Group.

cde/lib/DtHelp/il/iljpgencodedefs.h

@@ -0,0 +1,76 @@
+/* $XConsortium: iljpgencodedefs.h /main/3 1995/10/23 15:56:20 rswiston $ */
+/**---------------------------------------------------------------------
+***	
+***    (c)Copyright 1992 Hewlett-Packard Co.
+***    
+***                             RESTRICTED RIGHTS LEGEND
+***    Use, duplication, or disclosure by the U.S. Government is subject to
+***    restrictions as set forth in sub-paragraph (c)(1)(ii) of the Rights in
+***    Technical Data and Computer Software clause in DFARS 252.227-7013.
+***                             Hewlett-Packard Company
+***                             3000 Hanover Street
+***                             Palo Alto, CA 94304 U.S.A.
+***    Rights for non-DOD U.S. Government Departments and Agencies are as set
+***    forth in FAR 52.227-19(c)(1,2).
+***
+***-------------------------------------------------------------------*/
+
+
+#ifndef ILJPGENCODEDEFS_H
+#define ILJPGENCODEDEFS_H
+
+#include "ilint.h"
+#include "ilerrors.h"
+
+    /*  Equate ILJPG errors to IL errors */
+#define ILJPG_ERROR_ENCODE_MALLOC       IL_ERROR_MALLOC
+#define ILJPG_ERROR_ENCODE_PARS         IL_ERROR_COMPRESSED_DATA
+#define ILJPG_ERROR_ENCODE_DCAC_TABLE   IL_ERROR_COMPRESSED_DATA
+#define ILJPG_ERROR_ENCODE_Q_TABLE      IL_ERROR_COMPRESSED_DATA
+
+
+    /*  Define a JPEG stream: "pBuffer" points to a buffer in
+        memory, "pPastEndBuffer" points to byte just past end
+        (buffer is of size "pPastEndBuffer" - "pBuffer") and
+        pDst points to the place to store the next byte.
+    */
+typedef struct {
+    ilPtr           pBuffer;
+    ilPtr           pDst;
+    ilPtr           pPastEndBuffer;
+    } ilJPEGEncodeStream, *ilJPEGEncodeStreamPtr;
+
+#define ILJPG_ENCODE_STREAM ilJPEGEncodeStreamPtr
+
+
+    /*  Called by ILJPG_ENCODE_PUT_BYTE() macro to reallocate the buffer 
+        defined by "pStream" so that there is space for *exactly* "nBytes" bytes
+        to be written.  Zero (0) is returned if success else an error code.
+    */
+IL_EXTERN iljpgError _ilReallocJPEGEncode (
+    ilJPEGEncodeStreamPtr   pStream,
+    long                    nBytes
+    );
+
+
+    /*  # of bytes by which to expand the size of the output buffer
+        when realloc'ing to write one byte.  NOTE: must be >= 1!
+    */
+#define ILJPG_REALLOC_EXTRA   1024
+
+    /*  Macro to put a byte to a stream.  Return one (1) from macro
+        if success, else return zero (0) and set "_error" to a
+        non-zero error code.
+    */
+#define ILJPG_ENCODE_PUT_BYTE(_stream, _byte, _error) (                 \
+    ((_stream)->pDst >= (_stream)->pPastEndBuffer) ?                    \
+        ((_error = _ilReallocJPEGEncode (_stream, ILJPG_REALLOC_EXTRA)) ? 0 : \
+            (*(_stream)->pDst++ = _byte, 1)) :                          \
+        (*(_stream)->pDst++ = _byte, 1) )
+
+    /*  Macro to return position within dst buffer, like ftell() */
+#define ILJPG_ENCODE_OFFSET(_stream) \
+    ((_stream)->pDst - (_stream)->pBuffer)
+
+#endif
+