libjpeg/libpng or stb_image

git-svn-id: http://svn2.nishi.boats/svn/milsko/trunk@185 b9cfdab3-6d41-4d17-bbe4-086880011989

external/libjpeg/include/jinclude.h

@@ -0,0 +1,157 @@
+/*
+ * jinclude.h
+ *
+ * Copyright (C) 1991-1994, Thomas G. Lane.
+ * Modified 2017-2022 by Guido Vollbeding.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file exists to provide a single place to fix any problems with
+ * including the wrong system include files.  (Common problems are taken
+ * care of by the standard jconfig symbols, but on really weird systems
+ * you may have to edit this file.)
+ *
+ * NOTE: this file is NOT intended to be included by applications using
+ * the JPEG library.  Most applications need only include jpeglib.h.
+ */
+
+
+/* Include auto-config file to find out which system include files we need. */
+
+#include "jconfig.h"		/* auto configuration options */
+#define JCONFIG_INCLUDED	/* so that jpeglib.h doesn't do it again */
+
+/*
+ * We need the NULL macro and size_t typedef.
+ * On an ANSI-conforming system it is sufficient to include <stddef.h>.
+ * Otherwise, we get them from <stdlib.h> or <stdio.h>; we may have to
+ * pull in <sys/types.h> as well.
+ * Note that the core JPEG library does not require <stdio.h>;
+ * only the default error handler and data source/destination modules do.
+ * But we must pull it in because of the references to FILE in jpeglib.h.
+ * You can remove those references if you want to compile without <stdio.h>.
+ */
+
+#ifdef HAVE_STDDEF_H
+#include <stddef.h>
+#endif
+
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+
+#ifdef NEED_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+
+#include <stdio.h>
+
+/*
+ * We need memory copying and zeroing functions, plus strncpy().
+ * ANSI and System V implementations declare these in <string.h>.
+ * BSD doesn't have the mem() functions, but it does have bcopy()/bzero().
+ * Some systems may declare memset and memcpy in <memory.h>.
+ *
+ * NOTE: we assume the size parameters to these functions are of type size_t.
+ * Change the casts in these macros if not!
+ */
+
+#ifdef NEED_BSD_STRINGS
+
+#include <strings.h>
+#define MEMZERO(target,size)	bzero((void *)(target), (size_t)(size))
+#define MEMCOPY(dest,src,size)	bcopy((const void *)(src), (void *)(dest), (size_t)(size))
+
+#else /* not BSD, assume ANSI/SysV string lib */
+
+#include <string.h>
+#define MEMZERO(target,size)	memset((void *)(target), 0, (size_t)(size))
+#define MEMCOPY(dest,src,size)	memcpy((void *)(dest), (const void *)(src), (size_t)(size))
+
+#endif
+
+/*
+ * In ANSI C, and indeed any rational implementation, size_t is also the
+ * type returned by sizeof().  However, it seems there are some irrational
+ * implementations out there, in which sizeof() returns an int even though
+ * size_t is defined as long or unsigned long.  To ensure consistent results
+ * we always use this SIZEOF() macro in place of using sizeof() directly.
+ */
+
+#define SIZEOF(object)	((size_t) sizeof(object))
+
+/*
+ * The modules that use fread() and fwrite() always invoke them through
+ * these macros.  On some systems you may need to twiddle the argument casts.
+ * CAUTION: argument order is different from underlying functions!
+ *
+ * Furthermore, macros are provided for fflush() and ferror() in order
+ * to facilitate adaption by applications using an own FILE class.
+ *
+ * You can define your own custom file I/O functions in jconfig.h and
+ * #define JPEG_HAVE_FILE_IO_CUSTOM there to prevent redefinition here.
+ *
+ * You can #define JPEG_USE_FILE_IO_CUSTOM in jconfig.h to use custom file
+ * I/O functions implemented in Delphi VCL (Visual Component Library)
+ * in Vcl.Imaging.jpeg.pas for the TJPEGImage component utilizing
+ * the Delphi RTL (Run-Time Library) TMemoryStream component:
+ *
+ *   procedure jpeg_stdio_src(var cinfo: jpeg_decompress_struct;
+ *     input_file: TStream); external;
+ *
+ *   procedure jpeg_stdio_dest(var cinfo: jpeg_compress_struct;
+ *     output_file: TStream); external;
+ *
+ *   function jfread(var buf; recsize, reccount: Integer; S: TStream): Integer;
+ *   begin
+ *     Result := S.Read(buf, recsize * reccount);
+ *   end;
+ *
+ *   function jfwrite(const buf; recsize, reccount: Integer; S: TStream): Integer;
+ *   begin
+ *     Result := S.Write(buf, recsize * reccount);
+ *   end;
+ *
+ *   function jfflush(S: TStream): Integer;
+ *   begin
+ *     Result := 0;
+ *   end;
+ *
+ *   function jferror(S: TStream): Integer;
+ *   begin
+ *     Result := 0;
+ *   end;
+ *
+ * TMemoryStream of Delphi RTL has the distinctive feature to provide dynamic
+ * memory buffer management with a file/stream-based interface, particularly for
+ * the write (output) operation, which is easier to apply compared with direct
+ * implementations as given in jdatadst.c for memory destination.  Those direct
+ * implementations of dynamic memory write tend to be more difficult to use,
+ * so providing an option like TMemoryStream may be a useful alternative.
+ *
+ * The CFile/CMemFile classes of the Microsoft Foundation Class (MFC) Library
+ * may be used in a similar fashion.
+ */
+
+#ifndef JPEG_HAVE_FILE_IO_CUSTOM
+#ifdef JPEG_USE_FILE_IO_CUSTOM
+extern size_t jfread(void * __ptr, size_t __size, size_t __n, FILE * __stream);
+extern size_t jfwrite(const void * __ptr, size_t __size, size_t __n, FILE * __stream);
+extern int    jfflush(FILE * __stream);
+extern int    jferror(FILE * __fp);
+
+#define JFREAD(file,buf,sizeofbuf)  \
+  ((size_t) jfread((void *) (buf), (size_t) 1, (size_t) (sizeofbuf), (file)))
+#define JFWRITE(file,buf,sizeofbuf)  \
+  ((size_t) jfwrite((const void *) (buf), (size_t) 1, (size_t) (sizeofbuf), (file)))
+#define JFFLUSH(file)	jfflush(file)
+#define JFERROR(file)	jferror(file)
+#else
+#define JFREAD(file,buf,sizeofbuf)  \
+  ((size_t) fread((void *) (buf), (size_t) 1, (size_t) (sizeofbuf), (file)))
+#define JFWRITE(file,buf,sizeofbuf)  \
+  ((size_t) fwrite((const void *) (buf), (size_t) 1, (size_t) (sizeofbuf), (file)))
+#define JFFLUSH(file)	fflush(file)
+#define JFERROR(file)	ferror(file)
+#endif
+#endif