libjpeg update

git-svn-id: http://svn.miranda-ng.org/main/trunk@5843 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c

1 files changed, 390 insertions, 369 deletions

diff --git a/plugins/AdvaImg/src/LibJPEG/jmorecfg.h b/plugins/AdvaImg/src/LibJPEG/jmorecfg.h
index 6c085c36a6..f2600cc8ff 100644
--- a/plugins/AdvaImg/src/LibJPEG/jmorecfg.h
+++ b/plugins/AdvaImg/src/LibJPEG/jmorecfg.h
@@ -1,369 +1,390 @@
-/*
- * jmorecfg.h
- *
- * Copyright (C) 1991-1997, Thomas G. Lane.
- * Modified 1997-2011 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 contains additional configuration options that customize the
- * JPEG software for special applications or support machine-dependent
- * optimizations.  Most users will not need to touch this file.
- */
-
-
-/*
- * Define BITS_IN_JSAMPLE as either
- *   8   for 8-bit sample values (the usual setting)
- *   12  for 12-bit sample values
- * Only 8 and 12 are legal data precisions for lossy JPEG according to the
- * JPEG standard, and the IJG code does not support anything else!
- * We do not support run-time selection of data precision, sorry.
- */
-
-#define BITS_IN_JSAMPLE  8	/* use 8 or 12 */
-
-
-/*
- * Maximum number of components (color channels) allowed in JPEG image.
- * To meet the letter of the JPEG spec, set this to 255.  However, darn
- * few applications need more than 4 channels (maybe 5 for CMYK + alpha
- * mask).  We recommend 10 as a reasonable compromise; use 4 if you are
- * really short on memory.  (Each allowed component costs a hundred or so
- * bytes of storage, whether actually used in an image or not.)
- */
-
-#define MAX_COMPONENTS  10	/* maximum number of image components */
-
-
-/*
- * Basic data types.
- * You may need to change these if you have a machine with unusual data
- * type sizes; for example, "char" not 8 bits, "short" not 16 bits,
- * or "long" not 32 bits.  We don't care whether "int" is 16 or 32 bits,
- * but it had better be at least 16.
- */
-
-/* Representation of a single sample (pixel element value).
- * We frequently allocate large arrays of these, so it's important to keep
- * them small.  But if you have memory to burn and access to char or short
- * arrays is very slow on your hardware, you might want to change these.
- */
-
-#if BITS_IN_JSAMPLE == 8
-/* JSAMPLE should be the smallest type that will hold the values 0..255.
- * You can use a signed char by having GETJSAMPLE mask it with 0xFF.
- */
-
-#ifdef HAVE_UNSIGNED_CHAR
-
-typedef unsigned char JSAMPLE;
-#define GETJSAMPLE(value)  ((int) (value))
-
-#else /* not HAVE_UNSIGNED_CHAR */
-
-typedef char JSAMPLE;
-#ifdef CHAR_IS_UNSIGNED
-#define GETJSAMPLE(value)  ((int) (value))
-#else
-#define GETJSAMPLE(value)  ((int) (value) & 0xFF)
-#endif /* CHAR_IS_UNSIGNED */
-
-#endif /* HAVE_UNSIGNED_CHAR */
-
-#define MAXJSAMPLE	255
-#define CENTERJSAMPLE	128
-
-#endif /* BITS_IN_JSAMPLE == 8 */
-
-
-#if BITS_IN_JSAMPLE == 12
-/* JSAMPLE should be the smallest type that will hold the values 0..4095.
- * On nearly all machines "short" will do nicely.
- */
-
-typedef short JSAMPLE;
-#define GETJSAMPLE(value)  ((int) (value))
-
-#define MAXJSAMPLE	4095
-#define CENTERJSAMPLE	2048
-
-#endif /* BITS_IN_JSAMPLE == 12 */
-
-
-/* Representation of a DCT frequency coefficient.
- * This should be a signed value of at least 16 bits; "short" is usually OK.
- * Again, we allocate large arrays of these, but you can change to int
- * if you have memory to burn and "short" is really slow.
- */
-
-typedef short JCOEF;
-
-
-/* Compressed datastreams are represented as arrays of JOCTET.
- * These must be EXACTLY 8 bits wide, at least once they are written to
- * external storage.  Note that when using the stdio data source/destination
- * managers, this is also the data type passed to fread/fwrite.
- */
-
-#ifdef HAVE_UNSIGNED_CHAR
-
-typedef unsigned char JOCTET;
-#define GETJOCTET(value)  (value)
-
-#else /* not HAVE_UNSIGNED_CHAR */
-
-typedef char JOCTET;
-#ifdef CHAR_IS_UNSIGNED
-#define GETJOCTET(value)  (value)
-#else
-#define GETJOCTET(value)  ((value) & 0xFF)
-#endif /* CHAR_IS_UNSIGNED */
-
-#endif /* HAVE_UNSIGNED_CHAR */
-
-
-/* These typedefs are used for various table entries and so forth.
- * They must be at least as wide as specified; but making them too big
- * won't cost a huge amount of memory, so we don't provide special
- * extraction code like we did for JSAMPLE.  (In other words, these
- * typedefs live at a different point on the speed/space tradeoff curve.)
- */
-
-/* UINT8 must hold at least the values 0..255. */
-
-#ifdef HAVE_UNSIGNED_CHAR
-typedef unsigned char UINT8;
-#else /* not HAVE_UNSIGNED_CHAR */
-#ifdef CHAR_IS_UNSIGNED
-typedef char UINT8;
-#else /* not CHAR_IS_UNSIGNED */
-typedef short UINT8;
-#endif /* CHAR_IS_UNSIGNED */
-#endif /* HAVE_UNSIGNED_CHAR */
-
-/* UINT16 must hold at least the values 0..65535. */
-
-#ifdef HAVE_UNSIGNED_SHORT
-typedef unsigned short UINT16;
-#else /* not HAVE_UNSIGNED_SHORT */
-typedef unsigned int UINT16;
-#endif /* HAVE_UNSIGNED_SHORT */
-
-/* INT16 must hold at least the values -32768..32767. */
-
-#ifndef XMD_H			/* X11/xmd.h correctly defines INT16 */
-typedef short INT16;
-#endif
-
-/* INT32 must hold at least signed 32-bit values. */
-
-#ifndef XMD_H			/* X11/xmd.h correctly defines INT32 */
-#ifndef _BASETSD_H_		/* Microsoft defines it in basetsd.h */
-#ifndef _BASETSD_H		/* MinGW is slightly different */
-#ifndef QGLOBAL_H		/* Qt defines it in qglobal.h */
-typedef long INT32;
-#endif
-#endif
-#endif
-#endif
-
-/* Datatype used for image dimensions.  The JPEG standard only supports
- * images up to 64K*64K due to 16-bit fields in SOF markers.  Therefore
- * "unsigned int" is sufficient on all machines.  However, if you need to
- * handle larger images and you don't mind deviating from the spec, you
- * can change this datatype.
- */
-
-typedef unsigned int JDIMENSION;
-
-#define JPEG_MAX_DIMENSION  65500L  /* a tad under 64K to prevent overflows */
-
-
-/* These macros are used in all function definitions and extern declarations.
- * You could modify them if you need to change function linkage conventions;
- * in particular, you'll need to do that to make the library a Windows DLL.
- * Another application is to make all functions global for use with debuggers
- * or code profilers that require it.
- */
-
-/* a function called through method pointers: */
-#define METHODDEF(type)		static type
-/* a function used only in its module: */
-#define LOCAL(type)		static type
-/* a function referenced thru EXTERNs: */
-#define GLOBAL(type)		type
-/* a reference to a GLOBAL function: */
-#define EXTERN(type)		extern type
-
-
-/* This macro is used to declare a "method", that is, a function pointer.
- * We want to supply prototype parameters if the compiler can cope.
- * Note that the arglist parameter must be parenthesized!
- * Again, you can customize this if you need special linkage keywords.
- */
-
-#ifdef HAVE_PROTOTYPES
-#define JMETHOD(type,methodname,arglist)  type (*methodname) arglist
-#else
-#define JMETHOD(type,methodname,arglist)  type (*methodname) ()
-#endif
-
-
-/* Here is the pseudo-keyword for declaring pointers that must be "far"
- * on 80x86 machines.  Most of the specialized coding for 80x86 is handled
- * by just saying "FAR *" where such a pointer is needed.  In a few places
- * explicit coding is needed; see uses of the NEED_FAR_POINTERS symbol.
- */
-
-#ifndef FAR
-#ifdef NEED_FAR_POINTERS
-#define FAR  far
-#else
-#define FAR
-#endif
-#endif
-
-
-/*
- * On a few systems, type boolean and/or its values FALSE, TRUE may appear
- * in standard header files.  Or you may have conflicts with application-
- * specific header files that you want to include together with these files.
- * Defining HAVE_BOOLEAN before including jpeglib.h should make it work.
- */
-
-#ifndef HAVE_BOOLEAN
-typedef int boolean;
-#endif
-#ifndef FALSE			/* in case these macros already exist */
-#define FALSE	0		/* values of boolean */
-#endif
-#ifndef TRUE
-#define TRUE	1
-#endif
-
-
-/*
- * The remaining options affect code selection within the JPEG library,
- * but they don't need to be visible to most applications using the library.
- * To minimize application namespace pollution, the symbols won't be
- * defined unless JPEG_INTERNALS or JPEG_INTERNAL_OPTIONS has been defined.
- */
-
-#ifdef JPEG_INTERNALS
-#define JPEG_INTERNAL_OPTIONS
-#endif
-
-#ifdef JPEG_INTERNAL_OPTIONS
-
-
-/*
- * These defines indicate whether to include various optional functions.
- * Undefining some of these symbols will produce a smaller but less capable
- * library.  Note that you can leave certain source files out of the
- * compilation/linking process if you've #undef'd the corresponding symbols.
- * (You may HAVE to do that if your compiler doesn't like null source files.)
- */
-
-/* Capability options common to encoder and decoder: */
-
-#define DCT_ISLOW_SUPPORTED	/* slow but accurate integer algorithm */
-#define DCT_IFAST_SUPPORTED	/* faster, less accurate integer method */
-#define DCT_FLOAT_SUPPORTED	/* floating-point: accurate, fast on fast HW */
-
-/* Encoder capability options: */
-
-#define C_ARITH_CODING_SUPPORTED    /* Arithmetic coding back end? */
-#define C_MULTISCAN_FILES_SUPPORTED /* Multiple-scan JPEG files? */
-#define C_PROGRESSIVE_SUPPORTED	    /* Progressive JPEG? (Requires MULTISCAN)*/
-#define DCT_SCALING_SUPPORTED	    /* Input rescaling via DCT? (Requires DCT_ISLOW)*/
-#define ENTROPY_OPT_SUPPORTED	    /* Optimization of entropy coding parms? */
-/* Note: if you selected 12-bit data precision, it is dangerous to turn off
- * ENTROPY_OPT_SUPPORTED.  The standard Huffman tables are only good for 8-bit
- * precision, so jchuff.c normally uses entropy optimization to compute
- * usable tables for higher precision.  If you don't want to do optimization,
- * you'll have to supply different default Huffman tables.
- * The exact same statements apply for progressive JPEG: the default tables
- * don't work for progressive mode.  (This may get fixed, however.)
- */
-#define INPUT_SMOOTHING_SUPPORTED   /* Input image smoothing option? */
-
-/* Decoder capability options: */
-
-#define D_ARITH_CODING_SUPPORTED    /* Arithmetic coding back end? */
-#define D_MULTISCAN_FILES_SUPPORTED /* Multiple-scan JPEG files? */
-#define D_PROGRESSIVE_SUPPORTED	    /* Progressive JPEG? (Requires MULTISCAN)*/
-#define IDCT_SCALING_SUPPORTED	    /* Output rescaling via IDCT? */
-#define SAVE_MARKERS_SUPPORTED	    /* jpeg_save_markers() needed? */
-#define BLOCK_SMOOTHING_SUPPORTED   /* Block smoothing? (Progressive only) */
-#undef  UPSAMPLE_SCALING_SUPPORTED  /* Output rescaling at upsample stage? */
-#define UPSAMPLE_MERGING_SUPPORTED  /* Fast path for sloppy upsampling? */
-#define QUANT_1PASS_SUPPORTED	    /* 1-pass color quantization? */
-#define QUANT_2PASS_SUPPORTED	    /* 2-pass color quantization? */
-
-/* more capability options later, no doubt */
-
-
-/*
- * Ordering of RGB data in scanlines passed to or from the application.
- * If your application wants to deal with data in the order B,G,R, just
- * change these macros.  You can also deal with formats such as R,G,B,X
- * (one extra byte per pixel) by changing RGB_PIXELSIZE.  Note that changing
- * the offsets will also change the order in which colormap data is organized.
- * RESTRICTIONS:
- * 1. The sample applications cjpeg,djpeg do NOT support modified RGB formats.
- * 2. The color quantizer modules will not behave desirably if RGB_PIXELSIZE
- *    is not 3 (they don't understand about dummy color components!).  So you
- *    can't use color quantization if you change that value.
- */
-
-#define RGB_RED		0	/* Offset of Red in an RGB scanline element */
-#define RGB_GREEN	1	/* Offset of Green */
-#define RGB_BLUE	2	/* Offset of Blue */
-#define RGB_PIXELSIZE	3	/* JSAMPLEs per RGB scanline element */
-
-
-/* Definitions for speed-related optimizations. */
-
-
-/* If your compiler supports inline functions, define INLINE
- * as the inline keyword; otherwise define it as empty.
- */
-
-#ifndef INLINE
-#ifdef __GNUC__			/* for instance, GNU C knows about inline */
-#define INLINE __inline__
-#endif
-#ifndef INLINE
-#define INLINE			/* default is to define it as empty */
-#endif
-#endif
-
-
-/* On some machines (notably 68000 series) "int" is 32 bits, but multiplying
- * two 16-bit shorts is faster than multiplying two ints.  Define MULTIPLIER
- * as short on such a machine.  MULTIPLIER must be at least 16 bits wide.
- */
-
-#ifndef MULTIPLIER
-#define MULTIPLIER  int		/* type for fastest integer multiply */
-#endif
-
-
-/* FAST_FLOAT should be either float or double, whichever is done faster
- * by your compiler.  (Note that this type is only used in the floating point
- * DCT routines, so it only matters if you've defined DCT_FLOAT_SUPPORTED.)
- * Typically, float is faster in ANSI C compilers, while double is faster in
- * pre-ANSI compilers (because they insist on converting to double anyway).
- * The code below therefore chooses float if we have ANSI-style prototypes.
- */
-
-#ifndef FAST_FLOAT
-#ifdef HAVE_PROTOTYPES
-#define FAST_FLOAT  float
-#else
-#define FAST_FLOAT  double
-#endif
-#endif
-
-#endif /* JPEG_INTERNAL_OPTIONS */
+/*

+ * jmorecfg.h

+ *

+ * Copyright (C) 1991-1997, Thomas G. Lane.

+ * Modified 1997-2012 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 contains additional configuration options that customize the

+ * JPEG software for special applications or support machine-dependent

+ * optimizations.  Most users will not need to touch this file.

+ */

+

+

+/*

+ * Define BITS_IN_JSAMPLE as either

+ *   8   for 8-bit sample values (the usual setting)

+ *   12  for 12-bit sample values

+ * Only 8 and 12 are legal data precisions for lossy JPEG according to the

+ * JPEG standard, and the IJG code does not support anything else!

+ * We do not support run-time selection of data precision, sorry.

+ */

+

+#define BITS_IN_JSAMPLE  8	/* use 8 or 12 */

+

+

+/*

+ * Maximum number of components (color channels) allowed in JPEG image.

+ * To meet the letter of the JPEG spec, set this to 255.  However, darn

+ * few applications need more than 4 channels (maybe 5 for CMYK + alpha

+ * mask).  We recommend 10 as a reasonable compromise; use 4 if you are

+ * really short on memory.  (Each allowed component costs a hundred or so

+ * bytes of storage, whether actually used in an image or not.)

+ */

+

+#define MAX_COMPONENTS  10	/* maximum number of image components */

+

+

+/*

+ * Basic data types.

+ * You may need to change these if you have a machine with unusual data

+ * type sizes; for example, "char" not 8 bits, "short" not 16 bits,

+ * or "long" not 32 bits.  We don't care whether "int" is 16 or 32 bits,

+ * but it had better be at least 16.

+ */

+

+/* Representation of a single sample (pixel element value).

+ * We frequently allocate large arrays of these, so it's important to keep

+ * them small.  But if you have memory to burn and access to char or short

+ * arrays is very slow on your hardware, you might want to change these.

+ */

+

+#if BITS_IN_JSAMPLE == 8

+/* JSAMPLE should be the smallest type that will hold the values 0..255.

+ * You can use a signed char by having GETJSAMPLE mask it with 0xFF.

+ */

+

+#ifdef HAVE_UNSIGNED_CHAR

+

+typedef unsigned char JSAMPLE;

+#define GETJSAMPLE(value)  ((int) (value))

+

+#else /* not HAVE_UNSIGNED_CHAR */

+

+typedef char JSAMPLE;

+#ifdef CHAR_IS_UNSIGNED

+#define GETJSAMPLE(value)  ((int) (value))

+#else

+#define GETJSAMPLE(value)  ((int) (value) & 0xFF)

+#endif /* CHAR_IS_UNSIGNED */

+

+#endif /* HAVE_UNSIGNED_CHAR */

+

+#define MAXJSAMPLE	255

+#define CENTERJSAMPLE	128

+

+#endif /* BITS_IN_JSAMPLE == 8 */

+

+

+#if BITS_IN_JSAMPLE == 12

+/* JSAMPLE should be the smallest type that will hold the values 0..4095.

+ * On nearly all machines "short" will do nicely.

+ */

+

+typedef short JSAMPLE;

+#define GETJSAMPLE(value)  ((int) (value))

+

+#define MAXJSAMPLE	4095

+#define CENTERJSAMPLE	2048

+

+#endif /* BITS_IN_JSAMPLE == 12 */

+

+

+/* Representation of a DCT frequency coefficient.

+ * This should be a signed value of at least 16 bits; "short" is usually OK.

+ * Again, we allocate large arrays of these, but you can change to int

+ * if you have memory to burn and "short" is really slow.

+ */

+

+typedef short JCOEF;

+

+

+/* Compressed datastreams are represented as arrays of JOCTET.

+ * These must be EXACTLY 8 bits wide, at least once they are written to

+ * external storage.  Note that when using the stdio data source/destination

+ * managers, this is also the data type passed to fread/fwrite.

+ */

+

+#ifdef HAVE_UNSIGNED_CHAR

+

+typedef unsigned char JOCTET;

+#define GETJOCTET(value)  (value)

+

+#else /* not HAVE_UNSIGNED_CHAR */

+

+typedef char JOCTET;

+#ifdef CHAR_IS_UNSIGNED

+#define GETJOCTET(value)  (value)

+#else

+#define GETJOCTET(value)  ((value) & 0xFF)

+#endif /* CHAR_IS_UNSIGNED */

+

+#endif /* HAVE_UNSIGNED_CHAR */

+

+

+/* These typedefs are used for various table entries and so forth.

+ * They must be at least as wide as specified; but making them too big

+ * won't cost a huge amount of memory, so we don't provide special

+ * extraction code like we did for JSAMPLE.  (In other words, these

+ * typedefs live at a different point on the speed/space tradeoff curve.)

+ */

+

+/* UINT8 must hold at least the values 0..255. */

+

+#ifdef HAVE_UNSIGNED_CHAR

+typedef unsigned char UINT8;

+#else /* not HAVE_UNSIGNED_CHAR */

+#ifdef CHAR_IS_UNSIGNED

+typedef char UINT8;

+#else /* not CHAR_IS_UNSIGNED */

+typedef short UINT8;

+#endif /* CHAR_IS_UNSIGNED */

+#endif /* HAVE_UNSIGNED_CHAR */

+

+/* UINT16 must hold at least the values 0..65535. */

+

+#ifdef HAVE_UNSIGNED_SHORT

+typedef unsigned short UINT16;

+#else /* not HAVE_UNSIGNED_SHORT */

+typedef unsigned int UINT16;

+#endif /* HAVE_UNSIGNED_SHORT */

+

+/* INT16 must hold at least the values -32768..32767. */

+

+#ifndef XMD_H			/* X11/xmd.h correctly defines INT16 */

+typedef short INT16;

+#endif

+

+/* INT32 must hold at least signed 32-bit values. */

+

+#ifndef XMD_H			/* X11/xmd.h correctly defines INT32 */

+#ifndef _BASETSD_H_		/* Microsoft defines it in basetsd.h */

+#ifndef _BASETSD_H		/* MinGW is slightly different */

+#ifndef QGLOBAL_H		/* Qt defines it in qglobal.h */

+typedef long INT32;

+#endif

+#endif

+#endif

+#endif

+

+/* Datatype used for image dimensions.  The JPEG standard only supports

+ * images up to 64K*64K due to 16-bit fields in SOF markers.  Therefore

+ * "unsigned int" is sufficient on all machines.  However, if you need to

+ * handle larger images and you don't mind deviating from the spec, you

+ * can change this datatype.

+ */

+

+typedef unsigned int JDIMENSION;

+

+#define JPEG_MAX_DIMENSION  65500L  /* a tad under 64K to prevent overflows */

+

+

+/* These macros are used in all function definitions and extern declarations.

+ * You could modify them if you need to change function linkage conventions;

+ * in particular, you'll need to do that to make the library a Windows DLL.

+ * Another application is to make all functions global for use with debuggers

+ * or code profilers that require it.

+ */

+

+/* a function called through method pointers: */

+#define METHODDEF(type)		static type

+/* a function used only in its module: */

+#define LOCAL(type)		static type

+/* a function referenced thru EXTERNs: */

+#define GLOBAL(type)		type

+/* a reference to a GLOBAL function: */

+#define EXTERN(type)		extern type

+

+

+/* This macro is used to declare a "method", that is, a function pointer.

+ * We want to supply prototype parameters if the compiler can cope.

+ * Note that the arglist parameter must be parenthesized!

+ * Again, you can customize this if you need special linkage keywords.

+ */

+

+#ifdef HAVE_PROTOTYPES

+#define JMETHOD(type,methodname,arglist)  type (*methodname) arglist

+#else

+#define JMETHOD(type,methodname,arglist)  type (*methodname) ()

+#endif

+

+

+/* The noreturn type identifier is used to declare functions

+ * which cannot return.

+ * Compilers can thus create more optimized code and perform

+ * better checks for warnings and errors.

+ * Static analyzer tools can make improved inferences about

+ * execution paths and are prevented from giving false alerts.

+ *

+ * Unfortunately, the proposed specifications of corresponding

+ * extensions in the Dec 2011 ISO C standard revision (C11),

+ * GCC, MSVC, etc. are not viable.

+ * Thus we introduce a user defined type to declare noreturn

+ * functions at least for clarity.  A proper compiler would

+ * have a suitable noreturn type to match in place of void.

+ */

+

+#ifndef HAVE_NORETURN_T

+typedef void noreturn_t;

+#endif

+

+

+/* Here is the pseudo-keyword for declaring pointers that must be "far"

+ * on 80x86 machines.  Most of the specialized coding for 80x86 is handled

+ * by just saying "FAR *" where such a pointer is needed.  In a few places

+ * explicit coding is needed; see uses of the NEED_FAR_POINTERS symbol.

+ */

+

+#ifndef FAR

+#ifdef NEED_FAR_POINTERS

+#define FAR  far

+#else

+#define FAR

+#endif

+#endif

+

+

+/*

+ * On a few systems, type boolean and/or its values FALSE, TRUE may appear

+ * in standard header files.  Or you may have conflicts with application-

+ * specific header files that you want to include together with these files.

+ * Defining HAVE_BOOLEAN before including jpeglib.h should make it work.

+ */

+

+#ifdef HAVE_BOOLEAN

+#ifndef FALSE			/* in case these macros already exist */

+#define FALSE	0		/* values of boolean */

+#endif

+#ifndef TRUE

+#define TRUE	1

+#endif

+#else

+typedef enum { FALSE = 0, TRUE = 1 } boolean;

+#endif

+

+

+/*

+ * The remaining options affect code selection within the JPEG library,

+ * but they don't need to be visible to most applications using the library.

+ * To minimize application namespace pollution, the symbols won't be

+ * defined unless JPEG_INTERNALS or JPEG_INTERNAL_OPTIONS has been defined.

+ */

+

+#ifdef JPEG_INTERNALS

+#define JPEG_INTERNAL_OPTIONS

+#endif

+

+#ifdef JPEG_INTERNAL_OPTIONS

+

+

+/*

+ * These defines indicate whether to include various optional functions.

+ * Undefining some of these symbols will produce a smaller but less capable

+ * library.  Note that you can leave certain source files out of the

+ * compilation/linking process if you've #undef'd the corresponding symbols.

+ * (You may HAVE to do that if your compiler doesn't like null source files.)

+ */

+

+/* Capability options common to encoder and decoder: */

+

+#define DCT_ISLOW_SUPPORTED	/* slow but accurate integer algorithm */

+#define DCT_IFAST_SUPPORTED	/* faster, less accurate integer method */

+#define DCT_FLOAT_SUPPORTED	/* floating-point: accurate, fast on fast HW */

+

+/* Encoder capability options: */

+

+#define C_ARITH_CODING_SUPPORTED    /* Arithmetic coding back end? */

+#define C_MULTISCAN_FILES_SUPPORTED /* Multiple-scan JPEG files? */

+#define C_PROGRESSIVE_SUPPORTED	    /* Progressive JPEG? (Requires MULTISCAN)*/

+#define DCT_SCALING_SUPPORTED	    /* Input rescaling via DCT? (Requires DCT_ISLOW)*/

+#define ENTROPY_OPT_SUPPORTED	    /* Optimization of entropy coding parms? */

+/* Note: if you selected 12-bit data precision, it is dangerous to turn off

+ * ENTROPY_OPT_SUPPORTED.  The standard Huffman tables are only good for 8-bit

+ * precision, so jchuff.c normally uses entropy optimization to compute

+ * usable tables for higher precision.  If you don't want to do optimization,

+ * you'll have to supply different default Huffman tables.

+ * The exact same statements apply for progressive JPEG: the default tables

+ * don't work for progressive mode.  (This may get fixed, however.)

+ */

+#define INPUT_SMOOTHING_SUPPORTED   /* Input image smoothing option? */

+

+/* Decoder capability options: */

+

+#define D_ARITH_CODING_SUPPORTED    /* Arithmetic coding back end? */

+#define D_MULTISCAN_FILES_SUPPORTED /* Multiple-scan JPEG files? */

+#define D_PROGRESSIVE_SUPPORTED	    /* Progressive JPEG? (Requires MULTISCAN)*/

+#define IDCT_SCALING_SUPPORTED	    /* Output rescaling via IDCT? */

+#define SAVE_MARKERS_SUPPORTED	    /* jpeg_save_markers() needed? */

+#define BLOCK_SMOOTHING_SUPPORTED   /* Block smoothing? (Progressive only) */

+#undef  UPSAMPLE_SCALING_SUPPORTED  /* Output rescaling at upsample stage? */

+#define UPSAMPLE_MERGING_SUPPORTED  /* Fast path for sloppy upsampling? */

+#define QUANT_1PASS_SUPPORTED	    /* 1-pass color quantization? */

+#define QUANT_2PASS_SUPPORTED	    /* 2-pass color quantization? */

+

+/* more capability options later, no doubt */

+

+

+/*

+ * Ordering of RGB data in scanlines passed to or from the application.

+ * If your application wants to deal with data in the order B,G,R, just

+ * change these macros.  You can also deal with formats such as R,G,B,X

+ * (one extra byte per pixel) by changing RGB_PIXELSIZE.  Note that changing

+ * the offsets will also change the order in which colormap data is organized.

+ * RESTRICTIONS:

+ * 1. The sample applications cjpeg,djpeg do NOT support modified RGB formats.

+ * 2. The color quantizer modules will not behave desirably if RGB_PIXELSIZE

+ *    is not 3 (they don't understand about dummy color components!).  So you

+ *    can't use color quantization if you change that value.

+ */

+

+#define RGB_RED		0	/* Offset of Red in an RGB scanline element */

+#define RGB_GREEN	1	/* Offset of Green */

+#define RGB_BLUE	2	/* Offset of Blue */

+#define RGB_PIXELSIZE	3	/* JSAMPLEs per RGB scanline element */

+

+

+/* Definitions for speed-related optimizations. */

+

+

+/* If your compiler supports inline functions, define INLINE

+ * as the inline keyword; otherwise define it as empty.

+ */

+

+#ifndef INLINE

+#ifdef __GNUC__			/* for instance, GNU C knows about inline */

+#define INLINE __inline__

+#endif

+#ifndef INLINE

+#define INLINE			/* default is to define it as empty */

+#endif

+#endif

+

+

+/* On some machines (notably 68000 series) "int" is 32 bits, but multiplying

+ * two 16-bit shorts is faster than multiplying two ints.  Define MULTIPLIER

+ * as short on such a machine.  MULTIPLIER must be at least 16 bits wide.

+ */

+

+#ifndef MULTIPLIER

+#define MULTIPLIER  int		/* type for fastest integer multiply */

+#endif

+

+

+/* FAST_FLOAT should be either float or double, whichever is done faster

+ * by your compiler.  (Note that this type is only used in the floating point

+ * DCT routines, so it only matters if you've defined DCT_FLOAT_SUPPORTED.)

+ * Typically, float is faster in ANSI C compilers, while double is faster in

+ * pre-ANSI compilers (because they insist on converting to double anyway).

+ * The code below therefore chooses float if we have ANSI-style prototypes.

+ */

+

+#ifndef FAST_FLOAT

+#ifdef HAVE_PROTOTYPES

+#define FAST_FLOAT  float

+#else

+#define FAST_FLOAT  double

+#endif

+#endif

+

+#endif /* JPEG_INTERNAL_OPTIONS */