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596 lines
21 KiB
596 lines
21 KiB
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/* pngconf.h - machine configurable file for libpng |
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* |
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* libpng version 1.5.12 - July 11, 2012 |
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* |
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* Copyright (c) 1998-2012 Glenn Randers-Pehrson |
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* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) |
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* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) |
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* |
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* This code is released under the libpng license. |
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* For conditions of distribution and use, see the disclaimer |
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* and license in png.h |
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* |
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*/ |
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/* Any machine specific code is near the front of this file, so if you |
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* are configuring libpng for a machine, you may want to read the section |
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* starting here down to where it starts to typedef png_color, png_text, |
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* and png_info. |
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*/ |
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#ifndef PNGCONF_H |
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#define PNGCONF_H |
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#ifndef PNG_BUILDING_SYMBOL_TABLE |
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/* PNG_NO_LIMITS_H may be used to turn off the use of the standard C |
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* definition file for machine specific limits, this may impact the |
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* correctness of the definitions below (see uses of INT_MAX). |
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*/ |
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# ifndef PNG_NO_LIMITS_H |
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# include <limits.h> |
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# endif |
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/* For the memory copy APIs (i.e. the standard definitions of these), |
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* because this file defines png_memcpy and so on the base APIs must |
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* be defined here. |
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*/ |
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# ifdef BSD |
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# include <strings.h> |
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# else |
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# include <string.h> |
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# endif |
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/* For png_FILE_p - this provides the standard definition of a |
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* FILE |
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*/ |
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# ifdef PNG_STDIO_SUPPORTED |
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# include <stdio.h> |
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# endif |
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#endif |
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/* This controls optimization of the reading of 16 and 32 bit values |
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* from PNG files. It can be set on a per-app-file basis - it |
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* just changes whether a macro is used when the function is called. |
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* The library builder sets the default; if read functions are not |
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* built into the library the macro implementation is forced on. |
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*/ |
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#ifndef PNG_READ_INT_FUNCTIONS_SUPPORTED |
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# define PNG_USE_READ_MACROS |
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#endif |
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#if !defined(PNG_NO_USE_READ_MACROS) && !defined(PNG_USE_READ_MACROS) |
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# if PNG_DEFAULT_READ_MACROS |
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# define PNG_USE_READ_MACROS |
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# endif |
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#endif |
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/* COMPILER SPECIFIC OPTIONS. |
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* |
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* These options are provided so that a variety of difficult compilers |
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* can be used. Some are fixed at build time (e.g. PNG_API_RULE |
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* below) but still have compiler specific implementations, others |
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* may be changed on a per-file basis when compiling against libpng. |
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*/ |
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/* The PNGARG macro protects us against machines that don't have function |
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* prototypes (ie K&R style headers). If your compiler does not handle |
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* function prototypes, define this macro and use the included ansi2knr. |
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* I've always been able to use _NO_PROTO as the indicator, but you may |
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* need to drag the empty declaration out in front of here, or change the |
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* ifdef to suit your own needs. |
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*/ |
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#ifndef PNGARG |
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# ifdef OF /* zlib prototype munger */ |
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# define PNGARG(arglist) OF(arglist) |
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# else |
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# ifdef _NO_PROTO |
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# define PNGARG(arglist) () |
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# else |
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# define PNGARG(arglist) arglist |
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# endif /* _NO_PROTO */ |
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# endif /* OF */ |
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#endif /* PNGARG */ |
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/* Function calling conventions. |
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* ============================= |
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* Normally it is not necessary to specify to the compiler how to call |
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* a function - it just does it - however on x86 systems derived from |
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* Microsoft and Borland C compilers ('IBM PC', 'DOS', 'Windows' systems |
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* and some others) there are multiple ways to call a function and the |
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* default can be changed on the compiler command line. For this reason |
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* libpng specifies the calling convention of every exported function and |
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* every function called via a user supplied function pointer. This is |
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* done in this file by defining the following macros: |
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* |
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* PNGAPI Calling convention for exported functions. |
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* PNGCBAPI Calling convention for user provided (callback) functions. |
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* PNGCAPI Calling convention used by the ANSI-C library (required |
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* for longjmp callbacks and sometimes used internally to |
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* specify the calling convention for zlib). |
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* |
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* These macros should never be overridden. If it is necessary to |
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* change calling convention in a private build this can be done |
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* by setting PNG_API_RULE (which defaults to 0) to one of the values |
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* below to select the correct 'API' variants. |
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* |
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* PNG_API_RULE=0 Use PNGCAPI - the 'C' calling convention - throughout. |
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* This is correct in every known environment. |
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* PNG_API_RULE=1 Use the operating system convention for PNGAPI and |
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* the 'C' calling convention (from PNGCAPI) for |
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* callbacks (PNGCBAPI). This is no longer required |
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* in any known environment - if it has to be used |
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* please post an explanation of the problem to the |
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* libpng mailing list. |
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* |
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* These cases only differ if the operating system does not use the C |
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* calling convention, at present this just means the above cases |
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* (x86 DOS/Windows sytems) and, even then, this does not apply to |
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* Cygwin running on those systems. |
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* |
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* Note that the value must be defined in pnglibconf.h so that what |
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* the application uses to call the library matches the conventions |
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* set when building the library. |
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*/ |
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/* Symbol export |
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* ============= |
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* When building a shared library it is almost always necessary to tell |
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* the compiler which symbols to export. The png.h macro 'PNG_EXPORT' |
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* is used to mark the symbols. On some systems these symbols can be |
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* extracted at link time and need no special processing by the compiler, |
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* on other systems the symbols are flagged by the compiler and just |
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* the declaration requires a special tag applied (unfortunately) in a |
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* compiler dependent way. Some systems can do either. |
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* |
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* A small number of older systems also require a symbol from a DLL to |
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* be flagged to the program that calls it. This is a problem because |
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* we do not know in the header file included by application code that |
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* the symbol will come from a shared library, as opposed to a statically |
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* linked one. For this reason the application must tell us by setting |
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* the magic flag PNG_USE_DLL to turn on the special processing before |
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* it includes png.h. |
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* |
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* Four additional macros are used to make this happen: |
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* |
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* PNG_IMPEXP The magic (if any) to cause a symbol to be exported from |
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* the build or imported if PNG_USE_DLL is set - compiler |
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* and system specific. |
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* |
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* PNG_EXPORT_TYPE(type) A macro that pre or appends PNG_IMPEXP to |
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* 'type', compiler specific. |
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* |
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* PNG_DLL_EXPORT Set to the magic to use during a libpng build to |
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* make a symbol exported from the DLL. Not used in the |
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* public header files; see pngpriv.h for how it is used |
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* in the libpng build. |
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* |
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* PNG_DLL_IMPORT Set to the magic to force the libpng symbols to come |
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* from a DLL - used to define PNG_IMPEXP when |
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* PNG_USE_DLL is set. |
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*/ |
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/* System specific discovery. |
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* ========================== |
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* This code is used at build time to find PNG_IMPEXP, the API settings |
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* and PNG_EXPORT_TYPE(), it may also set a macro to indicate the DLL |
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* import processing is possible. On Windows/x86 systems it also sets |
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* compiler-specific macros to the values required to change the calling |
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* conventions of the various functions. |
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*/ |
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#if ( defined(_Windows) || defined(_WINDOWS) || defined(WIN32) ||\ |
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defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__) ) &&\ |
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( defined(_X86_) || defined(_X64_) || defined(_M_IX86) ||\ |
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defined(_M_X64) || defined(_M_IA64) ) |
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/* Windows system (DOS doesn't support DLLs) running on x86/x64. Includes |
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* builds under Cygwin or MinGW. Also includes Watcom builds but these need |
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* special treatment because they are not compatible with GCC or Visual C |
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* because of different calling conventions. |
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*/ |
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# if PNG_API_RULE == 2 |
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/* If this line results in an error, either because __watcall is not |
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* understood or because of a redefine just below you cannot use *this* |
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* build of the library with the compiler you are using. *This* build was |
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* build using Watcom and applications must also be built using Watcom! |
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*/ |
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# define PNGCAPI __watcall |
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# endif |
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# if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800)) |
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# define PNGCAPI __cdecl |
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# if PNG_API_RULE == 1 |
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# define PNGAPI __stdcall |
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# endif |
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# else |
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/* An older compiler, or one not detected (erroneously) above, |
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* if necessary override on the command line to get the correct |
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* variants for the compiler. |
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*/ |
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# ifndef PNGCAPI |
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# define PNGCAPI _cdecl |
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# endif |
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# if PNG_API_RULE == 1 && !defined(PNGAPI) |
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# define PNGAPI _stdcall |
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# endif |
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# endif /* compiler/api */ |
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/* NOTE: PNGCBAPI always defaults to PNGCAPI. */ |
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# if defined(PNGAPI) && !defined(PNG_USER_PRIVATEBUILD) |
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ERROR: PNG_USER_PRIVATEBUILD must be defined if PNGAPI is changed |
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# endif |
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# if (defined(_MSC_VER) && _MSC_VER < 800) ||\ |
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(defined(__BORLANDC__) && __BORLANDC__ < 0x500) |
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/* older Borland and MSC |
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* compilers used '__export' and required this to be after |
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* the type. |
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*/ |
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# ifndef PNG_EXPORT_TYPE |
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# define PNG_EXPORT_TYPE(type) type PNG_IMPEXP |
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# endif |
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# define PNG_DLL_EXPORT __export |
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# else /* newer compiler */ |
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# define PNG_DLL_EXPORT __declspec(dllexport) |
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# ifndef PNG_DLL_IMPORT |
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# define PNG_DLL_IMPORT __declspec(dllimport) |
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# endif |
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# endif /* compiler */ |
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#else /* !Windows/x86 */ |
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# if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__) |
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# define PNGAPI _System |
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# else /* !Windows/x86 && !OS/2 */ |
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/* Use the defaults, or define PNG*API on the command line (but |
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* this will have to be done for every compile!) |
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*/ |
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# endif /* other system, !OS/2 */ |
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#endif /* !Windows/x86 */ |
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/* Now do all the defaulting . */ |
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#ifndef PNGCAPI |
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# define PNGCAPI |
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#endif |
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#ifndef PNGCBAPI |
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# define PNGCBAPI PNGCAPI |
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#endif |
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#ifndef PNGAPI |
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# define PNGAPI PNGCAPI |
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#endif |
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/* PNG_IMPEXP may be set on the compilation system command line or (if not set) |
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* then in an internal header file when building the library, otherwise (when |
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* using the library) it is set here. |
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*/ |
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#ifndef PNG_IMPEXP |
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# if defined(PNG_USE_DLL) && defined(PNG_DLL_IMPORT) |
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/* This forces use of a DLL, disallowing static linking */ |
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# define PNG_IMPEXP PNG_DLL_IMPORT |
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# endif |
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# ifndef PNG_IMPEXP |
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# define PNG_IMPEXP |
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# endif |
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#endif |
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/* In 1.5.2 the definition of PNG_FUNCTION has been changed to always treat |
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* 'attributes' as a storage class - the attributes go at the start of the |
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* function definition, and attributes are always appended regardless of the |
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* compiler. This considerably simplifies these macros but may cause problems |
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* if any compilers both need function attributes and fail to handle them as |
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* a storage class (this is unlikely.) |
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*/ |
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#ifndef PNG_FUNCTION |
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# define PNG_FUNCTION(type, name, args, attributes) attributes type name args |
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#endif |
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#ifndef PNG_EXPORT_TYPE |
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# define PNG_EXPORT_TYPE(type) PNG_IMPEXP type |
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#endif |
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/* The ordinal value is only relevant when preprocessing png.h for symbol |
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* table entries, so we discard it here. See the .dfn files in the |
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* scripts directory. |
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*/ |
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#ifndef PNG_EXPORTA |
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# define PNG_EXPORTA(ordinal, type, name, args, attributes)\ |
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PNG_FUNCTION(PNG_EXPORT_TYPE(type),(PNGAPI name),PNGARG(args), \ |
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extern attributes) |
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#endif |
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/* ANSI-C (C90) does not permit a macro to be invoked with an empty argument, |
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* so make something non-empty to satisfy the requirement: |
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*/ |
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#define PNG_EMPTY /*empty list*/ |
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#define PNG_EXPORT(ordinal, type, name, args)\ |
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PNG_EXPORTA(ordinal, type, name, args, PNG_EMPTY) |
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/* Use PNG_REMOVED to comment out a removed interface. */ |
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#ifndef PNG_REMOVED |
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# define PNG_REMOVED(ordinal, type, name, args, attributes) |
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#endif |
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#ifndef PNG_CALLBACK |
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# define PNG_CALLBACK(type, name, args) type (PNGCBAPI name) PNGARG(args) |
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#endif |
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/* Support for compiler specific function attributes. These are used |
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* so that where compiler support is available incorrect use of API |
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* functions in png.h will generate compiler warnings. |
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* |
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* Added at libpng-1.2.41. |
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*/ |
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#ifndef PNG_NO_PEDANTIC_WARNINGS |
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# ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED |
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# define PNG_PEDANTIC_WARNINGS_SUPPORTED |
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# endif |
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#endif |
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#ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED |
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/* Support for compiler specific function attributes. These are used |
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* so that where compiler support is available incorrect use of API |
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* functions in png.h will generate compiler warnings. Added at libpng |
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* version 1.2.41. |
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*/ |
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# if defined(__GNUC__) |
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# ifndef PNG_USE_RESULT |
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# define PNG_USE_RESULT __attribute__((__warn_unused_result__)) |
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# endif |
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# ifndef PNG_NORETURN |
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# define PNG_NORETURN __attribute__((__noreturn__)) |
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# endif |
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# ifndef PNG_ALLOCATED |
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# define PNG_ALLOCATED __attribute__((__malloc__)) |
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# endif |
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# ifndef PNG_DEPRECATED |
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# define PNG_DEPRECATED __attribute__((__deprecated__)) |
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# endif |
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# ifndef PNG_PRIVATE |
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# if 0 /* Doesn't work so we use deprecated instead*/ |
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# define PNG_PRIVATE \ |
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__attribute__((warning("This function is not exported by libpng."))) |
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# else |
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# define PNG_PRIVATE \ |
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__attribute__((__deprecated__)) |
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# endif |
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# endif |
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# endif /* __GNUC__ */ |
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# if defined(_MSC_VER) && (_MSC_VER >= 1300) |
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# ifndef PNG_USE_RESULT |
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# define PNG_USE_RESULT /* not supported */ |
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# endif |
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# ifndef PNG_NORETURN |
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# define PNG_NORETURN __declspec(noreturn) |
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# endif |
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# ifndef PNG_ALLOCATED |
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# if (_MSC_VER >= 1400) |
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# define PNG_ALLOCATED __declspec(restrict) |
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# endif |
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# endif |
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# ifndef PNG_DEPRECATED |
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# define PNG_DEPRECATED __declspec(deprecated) |
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# endif |
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# ifndef PNG_PRIVATE |
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# define PNG_PRIVATE __declspec(deprecated) |
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# endif |
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# endif /* _MSC_VER */ |
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#endif /* PNG_PEDANTIC_WARNINGS */ |
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#ifndef PNG_DEPRECATED |
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# define PNG_DEPRECATED /* Use of this function is deprecated */ |
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#endif |
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#ifndef PNG_USE_RESULT |
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# define PNG_USE_RESULT /* The result of this function must be checked */ |
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#endif |
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#ifndef PNG_NORETURN |
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# define PNG_NORETURN /* This function does not return */ |
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#endif |
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#ifndef PNG_ALLOCATED |
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# define PNG_ALLOCATED /* The result of the function is new memory */ |
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#endif |
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#ifndef PNG_PRIVATE |
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# define PNG_PRIVATE /* This is a private libpng function */ |
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#endif |
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#ifndef PNG_FP_EXPORT /* A floating point API. */ |
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# ifdef PNG_FLOATING_POINT_SUPPORTED |
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# define PNG_FP_EXPORT(ordinal, type, name, args)\ |
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PNG_EXPORT(ordinal, type, name, args) |
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# else /* No floating point APIs */ |
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# define PNG_FP_EXPORT(ordinal, type, name, args) |
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# endif |
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#endif |
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#ifndef PNG_FIXED_EXPORT /* A fixed point API. */ |
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# ifdef PNG_FIXED_POINT_SUPPORTED |
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# define PNG_FIXED_EXPORT(ordinal, type, name, args)\ |
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PNG_EXPORT(ordinal, type, name, args) |
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# else /* No fixed point APIs */ |
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# define PNG_FIXED_EXPORT(ordinal, type, name, args) |
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# endif |
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#endif |
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/* The following uses const char * instead of char * for error |
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* and warning message functions, so some compilers won't complain. |
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* If you do not want to use const, define PNG_NO_CONST here. |
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* |
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* This should not change how the APIs are called, so it can be done |
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* on a per-file basis in the application. |
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*/ |
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#ifndef PNG_CONST |
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# ifndef PNG_NO_CONST |
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# define PNG_CONST const |
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# else |
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# define PNG_CONST |
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# endif |
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#endif |
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/* Some typedefs to get us started. These should be safe on most of the |
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* common platforms. The typedefs should be at least as large as the |
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* numbers suggest (a png_uint_32 must be at least 32 bits long), but they |
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* don't have to be exactly that size. Some compilers dislike passing |
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* unsigned shorts as function parameters, so you may be better off using |
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* unsigned int for png_uint_16. |
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*/ |
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#if defined(INT_MAX) && (INT_MAX > 0x7ffffffeL) |
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typedef unsigned int png_uint_32; |
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typedef int png_int_32; |
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#else |
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typedef unsigned long png_uint_32; |
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typedef long png_int_32; |
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#endif |
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typedef unsigned short png_uint_16; |
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typedef short png_int_16; |
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typedef unsigned char png_byte; |
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#ifdef PNG_NO_SIZE_T |
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typedef unsigned int png_size_t; |
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#else |
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typedef size_t png_size_t; |
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#endif |
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#define png_sizeof(x) (sizeof (x)) |
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/* The following is needed for medium model support. It cannot be in the |
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* pngpriv.h header. Needs modification for other compilers besides |
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* MSC. Model independent support declares all arrays and pointers to be |
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* large using the far keyword. The zlib version used must also support |
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* model independent data. As of version zlib 1.0.4, the necessary changes |
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* have been made in zlib. The USE_FAR_KEYWORD define triggers other |
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* changes that are needed. (Tim Wegner) |
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*/ |
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/* Separate compiler dependencies (problem here is that zlib.h always |
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* defines FAR. (SJT) |
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*/ |
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#ifdef __BORLANDC__ |
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# if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__) |
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# define LDATA 1 |
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# else |
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# define LDATA 0 |
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# endif |
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/* GRR: why is Cygwin in here? Cygwin is not Borland C... */ |
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# if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__) |
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# define PNG_MAX_MALLOC_64K /* only used in build */ |
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# if (LDATA != 1) |
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# ifndef FAR |
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# define FAR __far |
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# endif |
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# define USE_FAR_KEYWORD |
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# endif /* LDATA != 1 */ |
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/* Possibly useful for moving data out of default segment. |
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* Uncomment it if you want. Could also define FARDATA as |
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* const if your compiler supports it. (SJT) |
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# define FARDATA FAR |
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*/ |
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# endif /* __WIN32__, __FLAT__, __CYGWIN__ */ |
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#endif /* __BORLANDC__ */ |
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/* Suggest testing for specific compiler first before testing for |
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* FAR. The Watcom compiler defines both __MEDIUM__ and M_I86MM, |
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* making reliance oncertain keywords suspect. (SJT) |
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*/ |
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/* MSC Medium model */ |
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#ifdef FAR |
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# ifdef M_I86MM |
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# define USE_FAR_KEYWORD |
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# define FARDATA FAR |
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# include <dos.h> |
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# endif |
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#endif |
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/* SJT: default case */ |
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#ifndef FAR |
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# define FAR |
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#endif |
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/* At this point FAR is always defined */ |
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#ifndef FARDATA |
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# define FARDATA |
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#endif |
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/* Typedef for floating-point numbers that are converted |
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* to fixed-point with a multiple of 100,000, e.g., gamma |
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*/ |
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typedef png_int_32 png_fixed_point; |
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|
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/* Add typedefs for pointers */ |
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typedef void FAR * png_voidp; |
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typedef PNG_CONST void FAR * png_const_voidp; |
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typedef png_byte FAR * png_bytep; |
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typedef PNG_CONST png_byte FAR * png_const_bytep; |
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typedef png_uint_32 FAR * png_uint_32p; |
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typedef PNG_CONST png_uint_32 FAR * png_const_uint_32p; |
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typedef png_int_32 FAR * png_int_32p; |
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typedef PNG_CONST png_int_32 FAR * png_const_int_32p; |
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typedef png_uint_16 FAR * png_uint_16p; |
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typedef PNG_CONST png_uint_16 FAR * png_const_uint_16p; |
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typedef png_int_16 FAR * png_int_16p; |
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typedef PNG_CONST png_int_16 FAR * png_const_int_16p; |
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typedef char FAR * png_charp; |
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typedef PNG_CONST char FAR * png_const_charp; |
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typedef png_fixed_point FAR * png_fixed_point_p; |
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typedef PNG_CONST png_fixed_point FAR * png_const_fixed_point_p; |
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typedef png_size_t FAR * png_size_tp; |
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typedef PNG_CONST png_size_t FAR * png_const_size_tp; |
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#ifdef PNG_STDIO_SUPPORTED |
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typedef FILE * png_FILE_p; |
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#endif |
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#ifdef PNG_FLOATING_POINT_SUPPORTED |
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typedef double FAR * png_doublep; |
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typedef PNG_CONST double FAR * png_const_doublep; |
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#endif |
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/* Pointers to pointers; i.e. arrays */ |
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typedef png_byte FAR * FAR * png_bytepp; |
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typedef png_uint_32 FAR * FAR * png_uint_32pp; |
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typedef png_int_32 FAR * FAR * png_int_32pp; |
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typedef png_uint_16 FAR * FAR * png_uint_16pp; |
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typedef png_int_16 FAR * FAR * png_int_16pp; |
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typedef PNG_CONST char FAR * FAR * png_const_charpp; |
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typedef char FAR * FAR * png_charpp; |
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typedef png_fixed_point FAR * FAR * png_fixed_point_pp; |
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#ifdef PNG_FLOATING_POINT_SUPPORTED |
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typedef double FAR * FAR * png_doublepp; |
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#endif |
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/* Pointers to pointers to pointers; i.e., pointer to array */ |
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typedef char FAR * FAR * FAR * png_charppp; |
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/* png_alloc_size_t is guaranteed to be no smaller than png_size_t, |
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* and no smaller than png_uint_32. Casts from png_size_t or png_uint_32 |
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* to png_alloc_size_t are not necessary; in fact, it is recommended |
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* not to use them at all so that the compiler can complain when something |
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* turns out to be problematic. |
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* Casts in the other direction (from png_alloc_size_t to png_size_t or |
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* png_uint_32) should be explicitly applied; however, we do not expect |
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* to encounter practical situations that require such conversions. |
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*/ |
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#if defined(__TURBOC__) && !defined(__FLAT__) |
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typedef unsigned long png_alloc_size_t; |
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#else |
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# if defined(_MSC_VER) && defined(MAXSEG_64K) |
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typedef unsigned long png_alloc_size_t; |
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# else |
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/* This is an attempt to detect an old Windows system where (int) is |
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* actually 16 bits, in that case png_malloc must have an argument with a |
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* bigger size to accomodate the requirements of the library. |
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*/ |
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# if (defined(_Windows) || defined(_WINDOWS) || defined(_WINDOWS_)) && \ |
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(!defined(INT_MAX) || INT_MAX <= 0x7ffffffeL) |
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typedef DWORD png_alloc_size_t; |
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# else |
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typedef png_size_t png_alloc_size_t; |
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# endif |
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# endif |
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#endif |
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#endif /* PNGCONF_H */
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