fontscalerdefs.h

/*
 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

#ifndef FontScalerDefsIncludesDefined
#define FontScalerDefsIncludesDefined

#include "AccelGlyphCache.h"

#ifdef  __cplusplus
extern "C" {
#endif

#define kPosInfinity16          (32767)
#define kNegInfinity16          (-32768)

#define kPosInfinity32          (0x7fffffff)
#define kNegInfinity32          (0x80000000)


#ifdef _LP64
typedef unsigned int            UInt32;
typedef int                     Int32;
#else
typedef unsigned long           UInt32;
typedef long                    Int32;
#endif
typedef unsigned short          UInt16;
typedef short                   Int16;
typedef unsigned char           UInt8;

typedef UInt8                   Byte;
typedef Int32                   hsFixed;
typedef Int32                   hsFract;
typedef UInt32                  Bool32;

#ifndef  __cplusplus
#ifndef false
         #define false           0
#endif

#ifndef true
        #define true            1
#endif
#endif

#define kPosInfinity32          (0x7fffffff)
#define kNegInfinity32          (0x80000000)

#define F26Dot6ToFixed(n)  ((n) << 10)
#define F26Dot6ToScalar(n) (((t2kScalar)(n)) / (t2kScalar)64)

  /* t2kFixed is the same as F16Dot16 format although T2K also uses 26.6 */
typedef Int32 t2kFixed;
typedef float t2kScalar;

#define t2kIntToFixed(x) ((t2kFixed)(x) << 16)
#define t2kFixedToInt(x) ((x) >> 16)

#define t2kFixedRound(x) (((x) + 0x8000) >> 16)
#define t2kFixed1 t2kIntToFixed(1)

#define t2kFloatToFixed(f) (t2kFixed)((f) * (float)(t2kFixed1))
#define t2kFixedToFloat(x) ((x) / (float)(65536))

#define t2kScalarAverage(a, b) (((a) + (b)) / (t2kScalar)(2))

  /* managed: 1 means the glyph has a hardware cached
   * copy, and its freeing is managed by the the usual
   * 2D disposer code.
   * A value of 0 means its either unaccelerated (and so has no cellInfos)
   * or we want to free this in a different way.
   * The field uses previously unused padding, so doesn't enlarge
   * the structure.
   */
#define UNMANAGED_GLYPH 0
#define MANAGED_GLYPH   1
typedef struct GlyphInfo {
    float        advanceX;
    float        advanceY;
    UInt16       width;
    UInt16       height;
    UInt16       rowBytes;
    UInt8         managed;
    float        topLeftX;
    float        topLeftY;
    void         *cellInfo;
    UInt8        *image;
} GlyphInfo;

  /* We use fffe and ffff as meaning invisible glyphs which have no
   * image, or advance and an empty outline.
   * Since there are no valid glyphs with this great a value (watch out for
   * large fonts in the future!) we can safely use check for >= this value
   */
#define INVISIBLE_GLYPHS 0xfffe

#define GSUB_TAG 0x47535542 /* 'GSUB' */
#define GPOS_TAG 0x47504F53 /* 'GPOS' */
#define GDEF_TAG 0x47444546 /* 'GDEF' */
#define MORT_TAG 0x6D6F7274 /* 'mort' */
#define MORX_TAG 0x6D6F7278 /* 'morx' */
#define KERN_TAG 0x6B65726E /* 'kern' */

typedef struct TTLayoutTableCacheEntry {
  const void* ptr;
  int   len;
} TTLayoutTableCacheEntry;

#define LAYOUTCACHE_ENTRIES 6

typedef struct TTLayoutTableCache {
  TTLayoutTableCacheEntry entries[LAYOUTCACHE_ENTRIES];
  void* kernPairs;
} TTLayoutTableCache;

#include "sunfontids.h"

JNIEXPORT extern TTLayoutTableCache* newLayoutTableCache();
JNIEXPORT extern void freeLayoutTableCache(TTLayoutTableCache* ltc);

/* If font is malformed then scaler context created by particular scaler
 * will be replaced by null scaler context.
 * Note that this context is not compatible with structure of the context
 * object used by particular scaler. Therefore, before using context
 * scaler has to check if it is NullContext.
 *
 * Note that in theory request with NullContext should not even reach native
 * scaler.
 *
 * It seems that the only reason to support NullContext is to simplify
 * FileFontStrike logic - presence of context is used as marker to
 * free the memory.
*/
JNIEXPORT int isNullScalerContext(void *context);

#ifdef  __cplusplus
}
#endif

#endif