Index: src/cff/cf2blues.h |
diff --git a/src/cff/cf2blues.h b/src/cff/cf2blues.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..2f38fcad8f5ce932a6ecc07f05a9b97f4ce6c53a |
--- /dev/null |
+++ b/src/cff/cf2blues.h |
@@ -0,0 +1,185 @@ |
+/***************************************************************************/ |
+/* */ |
+/* cf2blues.h */ |
+/* */ |
+/* Adobe's code for handling Blue Zones (specification). */ |
+/* */ |
+/* Copyright 2009-2013 Adobe Systems Incorporated. */ |
+/* */ |
+/* This software, and all works of authorship, whether in source or */ |
+/* object code form as indicated by the copyright notice(s) included */ |
+/* herein (collectively, the "Work") is made available, and may only be */ |
+/* used, modified, and distributed under the FreeType Project License, */ |
+/* LICENSE.TXT. Additionally, subject to the terms and conditions of the */ |
+/* FreeType Project License, each contributor to the Work hereby grants */ |
+/* to any individual or legal entity exercising permissions granted by */ |
+/* the FreeType Project License and this section (hereafter, "You" or */ |
+/* "Your") a perpetual, worldwide, non-exclusive, no-charge, */ |
+/* royalty-free, irrevocable (except as stated in this section) patent */ |
+/* license to make, have made, use, offer to sell, sell, import, and */ |
+/* otherwise transfer the Work, where such license applies only to those */ |
+/* patent claims licensable by such contributor that are necessarily */ |
+/* infringed by their contribution(s) alone or by combination of their */ |
+/* contribution(s) with the Work to which such contribution(s) was */ |
+/* submitted. If You institute patent litigation against any entity */ |
+/* (including a cross-claim or counterclaim in a lawsuit) alleging that */ |
+/* the Work or a contribution incorporated within the Work constitutes */ |
+/* direct or contributory patent infringement, then any patent licenses */ |
+/* granted to You under this License for that Work shall terminate as of */ |
+/* the date such litigation is filed. */ |
+/* */ |
+/* By using, modifying, or distributing the Work you indicate that you */ |
+/* have read and understood the terms and conditions of the */ |
+/* FreeType Project License as well as those provided in this section, */ |
+/* and you accept them fully. */ |
+/* */ |
+/***************************************************************************/ |
+ |
+ |
+ /* |
+ * A `CF2_Blues' object stores the blue zones (horizontal alignment |
+ * zones) of a font. These are specified in the CFF private dictionary |
+ * by `BlueValues', `OtherBlues', `FamilyBlues', and `FamilyOtherBlues'. |
+ * Each zone is defined by a top and bottom edge in character space. |
+ * Further, each zone is either a top zone or a bottom zone, as recorded |
+ * by `bottomZone'. |
+ * |
+ * The maximum number of `BlueValues' and `FamilyBlues' is 7 each. |
+ * However, these are combined to produce a total of 7 zones. |
+ * Similarly, the maximum number of `OtherBlues' and `FamilyOtherBlues' |
+ * is 5 and these are combined to produce an additional 5 zones. |
+ * |
+ * Blue zones are used to `capture' hints and force them to a common |
+ * alignment point. This alignment is recorded in device space in |
+ * `dsFlatEdge'. Except for this value, a `CF2_Blues' object could be |
+ * constructed independently of scaling. Construction may occur once |
+ * the matrix is known. Other features implemented in the Capture |
+ * method are overshoot suppression, overshoot enforcement, and Blue |
+ * Boost. |
+ * |
+ * Capture is determined by `BlueValues' and `OtherBlues', but the |
+ * alignment point may be adjusted to the scaled flat edge of |
+ * `FamilyBlues' or `FamilyOtherBlues'. No alignment is done to the |
+ * curved edge of a zone. |
+ * |
+ */ |
+ |
+ |
+#ifndef __CF2BLUES_H__ |
+#define __CF2BLUES_H__ |
+ |
+ |
+#include "cf2glue.h" |
+ |
+ |
+FT_BEGIN_HEADER |
+ |
+ |
+ /* |
+ * `CF2_Hint' is shared by `cf2hints.h' and |
+ * `cf2blues.h', but `cf2blues.h' depends on |
+ * `cf2hints.h', so define it here. Note: The typedef is in |
+ * `cf2glue.h'. |
+ * |
+ */ |
+ enum |
+ { |
+ CF2_GhostBottom = 0x1, /* a single bottom edge */ |
+ CF2_GhostTop = 0x2, /* a single top edge */ |
+ CF2_PairBottom = 0x4, /* the bottom edge of a stem hint */ |
+ CF2_PairTop = 0x8, /* the top edge of a stem hint */ |
+ CF2_Locked = 0x10, /* this edge has been aligned */ |
+ /* by a blue zone */ |
+ CF2_Synthetic = 0x20 /* this edge was synthesized */ |
+ }; |
+ |
+ |
+ /* |
+ * Default value for OS/2 typoAscender/Descender when their difference |
+ * is not equal to `unitsPerEm'. The default is based on -250 and 1100 |
+ * in `CF2_Blues', assuming 1000 units per em here. |
+ * |
+ */ |
+ enum |
+ { |
+ CF2_ICF_Top = cf2_intToFixed( 880 ), |
+ CF2_ICF_Bottom = cf2_intToFixed( -120 ) |
+ }; |
+ |
+ |
+ /* |
+ * Constant used for hint adjustment and for synthetic em box hint |
+ * placement. |
+ */ |
+#define CF2_MIN_COUNTER cf2_floatToFixed( 0.5 ) |
+ |
+ |
+ /* shared typedef is in cf2glue.h */ |
+ struct CF2_HintRec_ |
+ { |
+ CF2_UInt flags; /* attributes of the edge */ |
+ size_t index; /* index in original stem hint array */ |
+ /* (if not synthetic) */ |
+ CF2_Fixed csCoord; |
+ CF2_Fixed dsCoord; |
+ CF2_Fixed scale; |
+ }; |
+ |
+ |
+ typedef struct CF2_BlueRec_ |
+ { |
+ CF2_Fixed csBottomEdge; |
+ CF2_Fixed csTopEdge; |
+ CF2_Fixed csFlatEdge; /* may be from either local or Family zones */ |
+ CF2_Fixed dsFlatEdge; /* top edge of bottom zone or bottom edge */ |
+ /* of top zone (rounded) */ |
+ FT_Bool bottomZone; |
+ |
+ } CF2_BlueRec; |
+ |
+ |
+ /* max total blue zones is 12 */ |
+ enum |
+ { |
+ CF2_MAX_BLUES = 7, |
+ CF2_MAX_OTHERBLUES = 5 |
+ }; |
+ |
+ |
+ typedef struct CF2_BluesRec_ |
+ { |
+ CF2_Fixed scale; |
+ CF2_UInt count; |
+ FT_Bool suppressOvershoot; |
+ FT_Bool doEmBoxHints; |
+ |
+ CF2_Fixed blueScale; |
+ CF2_Fixed blueShift; |
+ CF2_Fixed blueFuzz; |
+ |
+ CF2_Fixed boost; |
+ |
+ CF2_HintRec emBoxTopEdge; |
+ CF2_HintRec emBoxBottomEdge; |
+ |
+ CF2_BlueRec zone[CF2_MAX_BLUES + CF2_MAX_OTHERBLUES]; |
+ |
+ } CF2_BluesRec, *CF2_Blues; |
+ |
+ |
+ FT_LOCAL( void ) |
+ cf2_blues_init( CF2_Blues blues, |
+ CF2_Font font ); |
+ FT_LOCAL( FT_Bool ) |
+ cf2_blues_capture( const CF2_Blues blues, |
+ CF2_Hint bottomHintEdge, |
+ CF2_Hint topHintEdge ); |
+ |
+ |
+FT_END_HEADER |
+ |
+ |
+#endif /* __CF2BLUES_H__ */ |
+ |
+ |
+/* END */ |