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/src/freetype/include/freetype/config/ftconfig.h

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  1/***************************************************************************/
  2/*                                                                         */
  3/*  ftconfig.h                                                             */
  4/*                                                                         */
  5/*    ANSI-specific configuration file (specification only).               */
  6/*                                                                         */
  7/*  Copyright 1996-2004, 2006-2008, 2010-2011 by                           */
  8/*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
  9/*                                                                         */
 10/*  This file is part of the FreeType project, and may only be used,       */
 11/*  modified, and distributed under the terms of the FreeType project      */
 12/*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
 13/*  this file you indicate that you have read the license and              */
 14/*  understand and accept it fully.                                        */
 15/*                                                                         */
 16/***************************************************************************/
 17
 18
 19  /*************************************************************************/
 20  /*                                                                       */
 21  /* This header file contains a number of macro definitions that are used */
 22  /* by the rest of the engine.  Most of the macros here are automatically */
 23  /* determined at compile time, and you should not need to change it to   */
 24  /* port FreeType, except to compile the library with a non-ANSI          */
 25  /* compiler.                                                             */
 26  /*                                                                       */
 27  /* Note however that if some specific modifications are needed, we       */
 28  /* advise you to place a modified copy in your build directory.          */
 29  /*                                                                       */
 30  /* The build directory is usually `freetype/builds/<system>', and        */
 31  /* contains system-specific files that are always included first when    */
 32  /* building the library.                                                 */
 33  /*                                                                       */
 34  /* This ANSI version should stay in `include/freetype/config'.           */
 35  /*                                                                       */
 36  /*************************************************************************/
 37
 38#ifndef __FTCONFIG_H__
 39#define __FTCONFIG_H__
 40
 41#include <ft2build.h>
 42#include FT_CONFIG_OPTIONS_H
 43#include FT_CONFIG_STANDARD_LIBRARY_H
 44
 45
 46FT_BEGIN_HEADER
 47
 48
 49  /*************************************************************************/
 50  /*                                                                       */
 51  /*               PLATFORM-SPECIFIC CONFIGURATION MACROS                  */
 52  /*                                                                       */
 53  /* These macros can be toggled to suit a specific system.  The current   */
 54  /* ones are defaults used to compile FreeType in an ANSI C environment   */
 55  /* (16bit compilers are also supported).  Copy this file to your own     */
 56  /* `freetype/builds/<system>' directory, and edit it to port the engine. */
 57  /*                                                                       */
 58  /*************************************************************************/
 59
 60
 61  /* There are systems (like the Texas Instruments 'C54x) where a `char' */
 62  /* has 16 bits.  ANSI C says that sizeof(char) is always 1.  Since an  */
 63  /* `int' has 16 bits also for this system, sizeof(int) gives 1 which   */
 64  /* is probably unexpected.                                             */
 65  /*                                                                     */
 66  /* `CHAR_BIT' (defined in limits.h) gives the number of bits in a      */
 67  /* `char' type.                                                        */
 68
 69#ifndef FT_CHAR_BIT
 70#define FT_CHAR_BIT  CHAR_BIT
 71#endif
 72
 73
 74  /* The size of an `int' type.  */
 75#if                                 FT_UINT_MAX == 0xFFFFUL
 76#define FT_SIZEOF_INT  (16 / FT_CHAR_BIT)
 77#elif                               FT_UINT_MAX == 0xFFFFFFFFUL
 78#define FT_SIZEOF_INT  (32 / FT_CHAR_BIT)
 79#elif FT_UINT_MAX > 0xFFFFFFFFUL && FT_UINT_MAX == 0xFFFFFFFFFFFFFFFFUL
 80#define FT_SIZEOF_INT  (64 / FT_CHAR_BIT)
 81#else
 82#error "Unsupported size of `int' type!"
 83#endif
 84
 85  /* The size of a `long' type.  A five-byte `long' (as used e.g. on the */
 86  /* DM642) is recognized but avoided.                                   */
 87#if                                  FT_ULONG_MAX == 0xFFFFFFFFUL
 88#define FT_SIZEOF_LONG  (32 / FT_CHAR_BIT)
 89#elif FT_ULONG_MAX > 0xFFFFFFFFUL && FT_ULONG_MAX == 0xFFFFFFFFFFUL
 90#define FT_SIZEOF_LONG  (32 / FT_CHAR_BIT)
 91#elif FT_ULONG_MAX > 0xFFFFFFFFUL && FT_ULONG_MAX == 0xFFFFFFFFFFFFFFFFUL
 92#define FT_SIZEOF_LONG  (64 / FT_CHAR_BIT)
 93#else
 94#error "Unsupported size of `long' type!"
 95#endif
 96
 97
 98  /* FT_UNUSED is a macro used to indicate that a given parameter is not  */
 99  /* used -- this is only used to get rid of unpleasant compiler warnings */
100#ifndef FT_UNUSED
101#define FT_UNUSED( arg )  ( (arg) = (arg) )
102#endif
103
104
105  /*************************************************************************/
106  /*                                                                       */
107  /*                     AUTOMATIC CONFIGURATION MACROS                    */
108  /*                                                                       */
109  /* These macros are computed from the ones defined above.  Don't touch   */
110  /* their definition, unless you know precisely what you are doing.  No   */
111  /* porter should need to mess with them.                                 */
112  /*                                                                       */
113  /*************************************************************************/
114
115
116  /*************************************************************************/
117  /*                                                                       */
118  /* Mac support                                                           */
119  /*                                                                       */
120  /*   This is the only necessary change, so it is defined here instead    */
121  /*   providing a new configuration file.                                 */
122  /*                                                                       */
123#if defined( __APPLE__ ) || ( defined( __MWERKS__ ) && defined( macintosh ) )
124  /* no Carbon frameworks for 64bit 10.4.x */
125  /* AvailabilityMacros.h is available since Mac OS X 10.2,        */
126  /* so guess the system version by maximum errno before inclusion */
127#include <errno.h>
128#ifdef ECANCELED /* defined since 10.2 */
129#include "AvailabilityMacros.h"
130#endif
131#if defined( __LP64__ ) && \
132    ( MAC_OS_X_VERSION_MIN_REQUIRED <= MAC_OS_X_VERSION_10_4 )
133#undef FT_MACINTOSH
134#endif
135
136#elif defined( __SC__ ) || defined( __MRC__ )
137  /* Classic MacOS compilers */
138#include "ConditionalMacros.h"
139#if TARGET_OS_MAC
140#define FT_MACINTOSH 1
141#endif
142
143#endif
144
145
146  /*************************************************************************/
147  /*                                                                       */
148  /* <Section>                                                             */
149  /*    basic_types                                                        */
150  /*                                                                       */
151  /*************************************************************************/
152
153
154  /*************************************************************************/
155  /*                                                                       */
156  /* <Type>                                                                */
157  /*    FT_Int16                                                           */
158  /*                                                                       */
159  /* <Description>                                                         */
160  /*    A typedef for a 16bit signed integer type.                         */
161  /*                                                                       */
162  typedef signed short  FT_Int16;
163
164
165  /*************************************************************************/
166  /*                                                                       */
167  /* <Type>                                                                */
168  /*    FT_UInt16                                                          */
169  /*                                                                       */
170  /* <Description>                                                         */
171  /*    A typedef for a 16bit unsigned integer type.                       */
172  /*                                                                       */
173  typedef unsigned short  FT_UInt16;
174
175  /* */
176
177
178  /* this #if 0 ... #endif clause is for documentation purposes */
179#if 0
180
181  /*************************************************************************/
182  /*                                                                       */
183  /* <Type>                                                                */
184  /*    FT_Int32                                                           */
185  /*                                                                       */
186  /* <Description>                                                         */
187  /*    A typedef for a 32bit signed integer type.  The size depends on    */
188  /*    the configuration.                                                 */
189  /*                                                                       */
190  typedef signed XXX  FT_Int32;
191
192
193  /*************************************************************************/
194  /*                                                                       */
195  /* <Type>                                                                */
196  /*    FT_UInt32                                                          */
197  /*                                                                       */
198  /*    A typedef for a 32bit unsigned integer type.  The size depends on  */
199  /*    the configuration.                                                 */
200  /*                                                                       */
201  typedef unsigned XXX  FT_UInt32;
202
203  /* */
204
205#endif
206
207#if FT_SIZEOF_INT == (32 / FT_CHAR_BIT)
208
209  typedef signed int      FT_Int32;
210  typedef unsigned int    FT_UInt32;
211
212#elif FT_SIZEOF_LONG == (32 / FT_CHAR_BIT)
213
214  typedef signed long     FT_Int32;
215  typedef unsigned long   FT_UInt32;
216
217#else
218#error "no 32bit type found -- please check your configuration files"
219#endif
220
221
222  /* look up an integer type that is at least 32 bits */
223#if FT_SIZEOF_INT >= (32 / FT_CHAR_BIT)
224
225  typedef int            FT_Fast;
226  typedef unsigned int   FT_UFast;
227
228#elif FT_SIZEOF_LONG >= (32 / FT_CHAR_BIT)
229
230  typedef long           FT_Fast;
231  typedef unsigned long  FT_UFast;
232
233#endif
234
235
236  /* determine whether we have a 64-bit int type for platforms without */
237  /* Autoconf                                                          */
238#if FT_SIZEOF_LONG == (64 / FT_CHAR_BIT)
239
240  /* FT_LONG64 must be defined if a 64-bit type is available */
241#define FT_LONG64
242#define FT_INT64  long
243
244#elif defined( _MSC_VER ) && _MSC_VER >= 900  /* Visual C++ (and Intel C++) */
245
246  /* this compiler provides the __int64 type */
247#define FT_LONG64
248#define FT_INT64  __int64
249
250#elif defined( __BORLANDC__ )  /* Borland C++ */
251
252  /* XXXX: We should probably check the value of __BORLANDC__ in order */
253  /*       to test the compiler version.                               */
254
255  /* this compiler provides the __int64 type */
256#define FT_LONG64
257#define FT_INT64  __int64
258
259#elif defined( __WATCOMC__ )   /* Watcom C++ */
260
261  /* Watcom doesn't provide 64-bit data types */
262
263#elif defined( __MWERKS__ )    /* Metrowerks CodeWarrior */
264
265#define FT_LONG64
266#define FT_INT64  long long int
267
268#elif defined( __GNUC__ )
269
270  /* GCC provides the `long long' type */
271#define FT_LONG64
272#define FT_INT64  long long int
273
274#endif /* FT_SIZEOF_LONG == (64 / FT_CHAR_BIT) */
275
276
277  /*************************************************************************/
278  /*                                                                       */
279  /* A 64-bit data type will create compilation problems if you compile    */
280  /* in strict ANSI mode.  To avoid them, we disable its use if __STDC__   */
281  /* is defined.  You can however ignore this rule by defining the         */
282  /* FT_CONFIG_OPTION_FORCE_INT64 configuration macro.                     */
283  /*                                                                       */
284#if defined( FT_LONG64 ) && !defined( FT_CONFIG_OPTION_FORCE_INT64 )
285
286#ifdef __STDC__
287
288  /* undefine the 64-bit macros in strict ANSI compilation mode */
289#undef FT_LONG64
290#undef FT_INT64
291
292#endif /* __STDC__ */
293
294#endif /* FT_LONG64 && !FT_CONFIG_OPTION_FORCE_INT64 */
295
296
297#define FT_BEGIN_STMNT  do {
298#define FT_END_STMNT    } while ( 0 )
299#define FT_DUMMY_STMNT  FT_BEGIN_STMNT FT_END_STMNT
300
301
302#ifndef  FT_CONFIG_OPTION_NO_ASSEMBLER
303  /* Provide assembler fragments for performance-critical functions. */
304  /* These must be defined `static __inline__' with GCC.             */
305
306#if defined( __CC_ARM ) || defined( __ARMCC__ )  /* RVCT */
307#define FT_MULFIX_ASSEMBLER  FT_MulFix_arm
308
309  /* documentation is in freetype.h */
310
311  static __inline FT_Int32
312  FT_MulFix_arm( FT_Int32  a,
313                 FT_Int32  b )
314  {
315    register FT_Int32  t, t2;
316
317
318    __asm
319    {
320      smull t2, t,  b,  a           /* (lo=t2,hi=t) = a*b */
321      mov   a,  t,  asr #31         /* a   = (hi >> 31) */
322      add   a,  a,  #0x8000         /* a  += 0x8000 */
323      adds  t2, t2, a               /* t2 += a */
324      adc   t,  t,  #0              /* t  += carry */
325      mov   a,  t2, lsr #16         /* a   = t2 >> 16 */
326      orr   a,  a,  t,  lsl #16     /* a  |= t << 16 */
327    }
328    return a;
329  }
330
331#endif /* __CC_ARM || __ARMCC__ */
332
333
334#ifdef __GNUC__
335
336#if defined( __arm__ ) && !defined( __thumb__ )    && \
337    !( defined( __CC_ARM ) || defined( __ARMCC__ ) )
338#define FT_MULFIX_ASSEMBLER  FT_MulFix_arm
339
340  /* documentation is in freetype.h */
341
342  static __inline__ FT_Int32
343  FT_MulFix_arm( FT_Int32  a,
344                 FT_Int32  b )
345  {
346    register FT_Int32  t, t2;
347
348
349    __asm__ __volatile__ (
350      "smull  %1, %2, %4, %3\n\t"       /* (lo=%1,hi=%2) = a*b */
351      "mov    %0, %2, asr #31\n\t"      /* %0  = (hi >> 31) */
352      "add    %0, %0, #0x8000\n\t"      /* %0 += 0x8000 */
353      "adds   %1, %1, %0\n\t"           /* %1 += %0 */
354      "adc    %2, %2, #0\n\t"           /* %2 += carry */
355      "mov    %0, %1, lsr #16\n\t"      /* %0  = %1 >> 16 */
356      "orr    %0, %0, %2, lsl #16\n\t"  /* %0 |= %2 << 16 */
357      : "=r"(a), "=&r"(t2), "=&r"(t)
358      : "r"(a), "r"(b) );
359    return a;
360  }
361
362#endif /* __arm__ && !__thumb__ && !( __CC_ARM || __ARMCC__ ) */
363
364#if defined( __i386__ )
365#define FT_MULFIX_ASSEMBLER  FT_MulFix_i386
366
367  /* documentation is in freetype.h */
368
369  static __inline__ FT_Int32
370  FT_MulFix_i386( FT_Int32  a,
371                  FT_Int32  b )
372  {
373    register FT_Int32  result;
374
375
376    __asm__ __volatile__ (
377      "imul  %%edx\n"
378      "movl  %%edx, %%ecx\n"
379      "sarl  $31, %%ecx\n"
380      "addl  $0x8000, %%ecx\n"
381      "addl  %%ecx, %%eax\n"
382      "adcl  $0, %%edx\n"
383      "shrl  $16, %%eax\n"
384      "shll  $16, %%edx\n"
385      "addl  %%edx, %%eax\n"
386      : "=a"(result), "=d"(b)
387      : "a"(a), "d"(b)
388      : "%ecx", "cc" );
389    return result;
390  }
391
392#endif /* i386 */
393
394#endif /* __GNUC__ */
395
396
397#ifdef _MSC_VER /* Visual C++ */
398
399#ifdef _M_IX86
400
401#define FT_MULFIX_ASSEMBLER  FT_MulFix_i386
402
403  /* documentation is in freetype.h */
404
405  static __inline FT_Int32
406  FT_MulFix_i386( FT_Int32  a,
407                  FT_Int32  b )
408  {
409    register FT_Int32  result;
410
411    __asm
412    {
413      mov eax, a
414      mov edx, b
415      imul edx
416      mov ecx, edx
417      sar ecx, 31
418      add ecx, 8000h
419      add eax, ecx
420      adc edx, 0
421      shr eax, 16
422      shl edx, 16
423      add eax, edx
424      mov result, eax
425    }
426    return result;
427  }
428
429#endif /* _M_IX86 */
430
431#endif /* _MSC_VER */
432
433#endif /* !FT_CONFIG_OPTION_NO_ASSEMBLER */
434
435
436#ifdef FT_CONFIG_OPTION_INLINE_MULFIX
437#ifdef FT_MULFIX_ASSEMBLER
438#define FT_MULFIX_INLINED  FT_MULFIX_ASSEMBLER
439#endif
440#endif
441
442
443#ifdef FT_MAKE_OPTION_SINGLE_OBJECT
444
445#define FT_LOCAL( x )      static  x
446#define FT_LOCAL_DEF( x )  static  x
447
448#else
449
450#ifdef __cplusplus
451#define FT_LOCAL( x )      extern "C"  x
452#define FT_LOCAL_DEF( x )  extern "C"  x
453#else
454#define FT_LOCAL( x )      extern  x
455#define FT_LOCAL_DEF( x )  x
456#endif
457
458#endif /* FT_MAKE_OPTION_SINGLE_OBJECT */
459
460
461#ifndef FT_BASE
462
463#ifdef __cplusplus
464#define FT_BASE( x )  extern "C"  x
465#else
466#define FT_BASE( x )  extern  x
467#endif
468
469#endif /* !FT_BASE */
470
471
472#ifndef FT_BASE_DEF
473
474#ifdef __cplusplus
475#define FT_BASE_DEF( x )  x
476#else
477#define FT_BASE_DEF( x )  x
478#endif
479
480#endif /* !FT_BASE_DEF */
481
482
483#ifndef FT_EXPORT
484
485#ifdef __cplusplus
486#define FT_EXPORT( x )  extern "C"  x
487#else
488#define FT_EXPORT( x )  extern  x
489#endif
490
491#endif /* !FT_EXPORT */
492
493
494#ifndef FT_EXPORT_DEF
495
496#ifdef __cplusplus
497#define FT_EXPORT_DEF( x )  extern "C"  x
498#else
499#define FT_EXPORT_DEF( x )  extern  x
500#endif
501
502#endif /* !FT_EXPORT_DEF */
503
504
505#ifndef FT_EXPORT_VAR
506
507#ifdef __cplusplus
508#define FT_EXPORT_VAR( x )  extern "C"  x
509#else
510#define FT_EXPORT_VAR( x )  extern  x
511#endif
512
513#endif /* !FT_EXPORT_VAR */
514
515  /* The following macros are needed to compile the library with a   */
516  /* C++ compiler and with 16bit compilers.                          */
517  /*                                                                 */
518
519  /* This is special.  Within C++, you must specify `extern "C"' for */
520  /* functions which are used via function pointers, and you also    */
521  /* must do that for structures which contain function pointers to  */
522  /* assure C linkage -- it's not possible to have (local) anonymous */
523  /* functions which are accessed by (global) function pointers.     */
524  /*                                                                 */
525  /*                                                                 */
526  /* FT_CALLBACK_DEF is used to _define_ a callback function.        */
527  /*                                                                 */
528  /* FT_CALLBACK_TABLE is used to _declare_ a constant variable that */
529  /* contains pointers to callback functions.                        */
530  /*                                                                 */
531  /* FT_CALLBACK_TABLE_DEF is used to _define_ a constant variable   */
532  /* that contains pointers to callback functions.                   */
533  /*                                                                 */
534  /*                                                                 */
535  /* Some 16bit compilers have to redefine these macros to insert    */
536  /* the infamous `_cdecl' or `__fastcall' declarations.             */
537  /*                                                                 */
538#ifndef FT_CALLBACK_DEF
539#ifdef __cplusplus
540#define FT_CALLBACK_DEF( x )  extern "C"  x
541#else
542#define FT_CALLBACK_DEF( x )  static  x
543#endif
544#endif /* FT_CALLBACK_DEF */
545
546#ifndef FT_CALLBACK_TABLE
547#ifdef __cplusplus
548#define FT_CALLBACK_TABLE      extern "C"
549#define FT_CALLBACK_TABLE_DEF  extern "C"
550#else
551#define FT_CALLBACK_TABLE      extern
552#define FT_CALLBACK_TABLE_DEF  /* nothing */
553#endif
554#endif /* FT_CALLBACK_TABLE */
555
556
557FT_END_HEADER
558
559
560#endif /* __FTCONFIG_H__ */
561
562
563/* END */