/**************************************************************************** * * pshints.h * * Adobe's code for handling CFF hints (body). * * Copyright 2007-2013 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. * */ #ifndef PSHINT_H_ #define PSHINT_H_ FT_BEGIN_HEADER enum { … }; /* * A HintMask object stores a bit mask that specifies which hints in the * charstring are active at a given time. Hints in CFF must be declared * at the start, before any drawing operators, with horizontal hints * preceding vertical hints. The HintMask is ordered the same way, with * horizontal hints immediately followed by vertical hints. Clients are * responsible for knowing how many of each type are present. * * The maximum total number of hints is 96, as specified by the CFF * specification. * * A HintMask is built 0 or more times while interpreting a charstring, by * the HintMask operator. There is only one HintMask, but it is built or * rebuilt each time there is a hint substitution (HintMask operator) in * the charstring. A default HintMask with all bits set is built if there * has been no HintMask operator prior to the first drawing operator. * */ CF2_HintMask; CF2_StemHint; /* * A HintMap object stores a piecewise linear function for mapping * y-coordinates from character space to device space, providing * appropriate pixel alignment to stem edges. * * The map is implemented as an array of `CF2_Hint' elements, each * representing an edge. When edges are paired, as from stem hints, the * bottom edge must immediately precede the top edge in the array. * Element character space AND device space positions must both increase * monotonically in the array. `CF2_Hint' elements are also used as * parameters to `cf2_blues_capture'. * * The `cf2_hintmap_build' method must be called before any drawing * operation (beginning with a Move operator) and at each hint * substitution (HintMask operator). * * The `cf2_hintmap_map' method is called to transform y-coordinates at * each drawing operation (move, line, curve). * */ /* TODO: make this a CF2_ArrStack and add a deep copy method */ enum { … }; CF2_HintMap; FT_LOCAL( FT_Bool ) cf2_hint_isValid( const CF2_Hint hint ); FT_LOCAL( FT_Bool ) cf2_hint_isTop( const CF2_Hint hint ); FT_LOCAL( FT_Bool ) cf2_hint_isBottom( const CF2_Hint hint ); FT_LOCAL( void ) cf2_hint_lock( CF2_Hint hint ); FT_LOCAL( void ) cf2_hintmap_init( CF2_HintMap hintmap, CF2_Font font, CF2_HintMap initialMap, CF2_ArrStack hintMoves, CF2_Fixed scale ); FT_LOCAL( void ) cf2_hintmap_build( CF2_HintMap hintmap, CF2_ArrStack hStemHintArray, CF2_ArrStack vStemHintArray, CF2_HintMask hintMask, CF2_Fixed hintOrigin, FT_Bool initialMap ); /* * GlyphPath is a wrapper for drawing operations that scales the * coordinates according to the render matrix and HintMap. It also tracks * open paths to control ClosePath and to insert MoveTo for broken fonts. * */ CF2_GlyphPath; FT_LOCAL( void ) cf2_glyphpath_init( CF2_GlyphPath glyphpath, CF2_Font font, CF2_OutlineCallbacks callbacks, CF2_Fixed scaleY, /* CF2_Fixed hShift, */ CF2_ArrStack hStemHintArray, CF2_ArrStack vStemHintArray, CF2_HintMask hintMask, CF2_Fixed hintOrigin, const CF2_Blues blues, const FT_Vector* fractionalTranslation ); FT_LOCAL( void ) cf2_glyphpath_finalize( CF2_GlyphPath glyphpath ); FT_LOCAL( void ) cf2_glyphpath_moveTo( CF2_GlyphPath glyphpath, CF2_Fixed x, CF2_Fixed y ); FT_LOCAL( void ) cf2_glyphpath_lineTo( CF2_GlyphPath glyphpath, CF2_Fixed x, CF2_Fixed y ); FT_LOCAL( void ) cf2_glyphpath_curveTo( CF2_GlyphPath glyphpath, CF2_Fixed x1, CF2_Fixed y1, CF2_Fixed x2, CF2_Fixed y2, CF2_Fixed x3, CF2_Fixed y3 ); FT_LOCAL( void ) cf2_glyphpath_closeOpenPath( CF2_GlyphPath glyphpath ); FT_END_HEADER #endif /* PSHINT_H_ */ /* END */
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