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kc3-lang/freetype/src/autofit/afhints.h
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Author :
Werner Lemberg
Date : 2004-03-27 08:43:17
Hash : 8bb07e63
Message : Add vertical phantom points. * include/freetype/internal/tttypes.h (TT_LoaderRec): Add `top_bearing', `vadvance', `pp3, and `pp4'. * src/autofit/afloader.c (af_loader_load_g): Handle two more points. * src/autohint/ahhint.c (ah_hinter_load): Handle two more points. * src/truetype/ttgload.c (Get_VMetrics): New function. (TT_Load_Simple_Glyph, TT_Process_Simple_Glyph): Handle two more points. (load_truetype_glyph): Use Get_VMetrics. Handle two more points. (compute_glyph_metrics): Thanks to vertical phantom points we now can always compute `advance_height' and `top_bearing'. * src/truetype/ttobjs.h (TT_SubglyphRec): Add vertical phantom points. * src/autohint/ahglyph.c (ah_outline_load): Fix allocation of `news'. Converting some files to Unix end-of-line convention.
- src/autofit/afhints.h
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#ifndef __AFHINTS_H__ #define __AFHINTS_H__ #include "aftypes.h" FT_BEGIN_HEADER /* * The definition of outline glyph hints. These are shared by all * script analysis routines (until now) * */ typedef enum { AF_DIMENSION_HORZ = 0, /* x coordinates, i.e. vertical segments & edges */ AF_DIMENSION_VERT = 1, /* y coordinates, i.e. horizontal segments & edges */ AF_DIMENSION_MAX /* do not remove */ } AF_Dimension; /* hint directions -- the values are computed so that two vectors are */ /* in opposite directions iff `dir1+dir2 == 0' */ typedef enum { AF_DIR_NONE = 4, AF_DIR_RIGHT = 1, AF_DIR_LEFT = -1, AF_DIR_UP = 2, AF_DIR_DOWN = -2 } AF_Direction; /* point hint flags */ typedef enum { AF_FLAG_NONE = 0, /* point type flags */ AF_FLAG_CONIC = (1 << 0), AF_FLAG_CUBIC = (1 << 1), AF_FLAG_CONTROL = AF_FLAG_CONIC | AF_FLAG_CUBIC, /* point extremum flags */ AF_FLAG_EXTREMA_X = (1 << 2), AF_FLAG_EXTREMA_Y = (1 << 3), /* point roundness flags */ AF_FLAG_ROUND_X = (1 << 4), AF_FLAG_ROUND_Y = (1 << 5), /* point touch flags */ AF_FLAG_TOUCH_X = (1 << 6), AF_FLAG_TOUCH_Y = (1 << 7), /* candidates for weak interpolation have this flag set */ AF_FLAG_WEAK_INTERPOLATION = (1 << 8), /* all inflection points in the outline have this flag set */ AF_FLAG_INFLECTION = (1 << 9) } AF_Flags; /* edge hint flags */ typedef enum { AF_EDGE_NORMAL = 0, AF_EDGE_ROUND = (1 << 0), AF_EDGE_SERIF = (1 << 1), AF_EDGE_DONE = (1 << 2) } AF_Edge_Flags; typedef struct AF_PointRec_* AF_Point; typedef struct AF_SegmentRec_* AF_Segment; typedef struct AF_EdgeRec_* AF_Edge; typedef struct AF_PointRec_ { AF_Flags flags; /* point flags used by hinter */ FT_Pos ox, oy; /* original, scaled position */ FT_Pos fx, fy; /* original, unscaled position (font units) */ FT_Pos x, y; /* current position */ FT_Pos u, v; /* current (x,y) or (y,x) depending on context */ AF_Direction in_dir; /* direction of inwards vector */ AF_Direction out_dir; /* direction of outwards vector */ AF_Point next; /* next point in contour */ AF_Point prev; /* previous point in contour */ } AF_PointRec; typedef struct AF_SegmentRec_ { AF_Edge_Flags flags; /* edge/segment flags for this segment */ AF_Direction dir; /* segment direction */ FT_Pos pos; /* position of segment */ FT_Pos min_coord; /* minimum coordinate of segment */ FT_Pos max_coord; /* maximum coordinate of segment */ AF_Edge edge; /* the segment's parent edge */ AF_Segment edge_next; /* link to next segment in parent edge */ AF_Segment link; /* (stem) link segment */ AF_Segment serif; /* primary segment for serifs */ FT_Pos num_linked; /* number of linked segments */ FT_Pos score; /* used during stem matching */ AF_Point first; /* first point in edge segment */ AF_Point last; /* last point in edge segment */ AF_Point* contour; /* ptr to first point of segment's contour */ } AF_SegmentRec; typedef struct AF_EdgeRec_ { FT_Pos fpos; /* original, unscaled position (font units) */ FT_Pos opos; /* original, scaled position */ FT_Pos pos; /* current position */ AF_Edge_Flags flags; /* edge flags */ AF_Direction dir; /* edge direction */ FT_Fixed scale; /* used to speed up interpolation between edges */ AF_Width blue_edge; /* non-NULL if this is a blue edge */ AF_Edge link; AF_Edge serif; FT_Int num_linked; FT_Int score; AF_Segment first; AF_Segment last; } AF_EdgeRec; typedef struct AF_AxisHintsRec_ { FT_Int num_segments; AF_Segment segments; FT_Int num_edges; AF_Edge edges; AF_Direction major_dir; } AF_AxisHintsRec, *AF_AxisHints; typedef struct AF_GlyphHintsRec_ { FT_Memory memory; FT_Fixed x_scale; FT_Pos x_delta; FT_Fixed y_scale; FT_Pos y_delta; FT_Pos edge_distance_threshold; FT_Int max_points; FT_Int num_points; AF_Point points; FT_Int max_contours; FT_Int num_contours; AF_Point* contours; AF_AxisHintsRec axis[ AF_DIMENSION_MAX ]; FT_UInt32 scaler_flags; /* copy of scaler flags */ FT_UInt32 other_flags; /* free for script-specific implementations */ AF_ScriptMetrics metrics; } AF_GlyphHintsRec; #define AF_HINTS_TEST_SCALER(h,f) ( (h)->scaler_flags & (f) ) #define AF_HINTS_TEST_OTHER(h,f) ( (h)->other_flags & (f) ) #define AF_HINTS_DO_HORIZONTAL(h) \ !AF_HINTS_TEST_SCALER(h,AF_SCALER_FLAG_NO_HORIZONTAL) #define AF_HINTS_DO_VERTICAL(h) \ !AF_HINTS_TEST_SCALER(h,AF_SCALER_FLAG_NO_VERTICAL) #define AF_HINTS_DO_ADVANCE(h) \ !AF_HINTS_TEST_SCALER(h,AF_SCALER_FLAG_NO_ADVANCE) FT_LOCAL( AF_Direction ) af_direction_compute( FT_Pos dx, FT_Pos dy ); FT_LOCAL( void ) af_glyph_hints_init( AF_GlyphHints hints, FT_Memory memory ); /* recomputes all AF_Point in a AF_GlyphHints from the definitions * in a source outline */ FT_LOCAL( FT_Error ) af_glyph_hints_reset( AF_GlyphHints hints, AF_Scaler scaler, AF_ScriptMetrics metrics, FT_Outline* outline ); FT_LOCAL( void ) af_glyph_hints_save( AF_GlyphHints hints, FT_Outline* outline ); FT_LOCAL( void ) af_glyph_hints_align_edge_points( AF_GlyphHints hints, AF_Dimension dim ); FT_LOCAL( void ) af_glyph_hints_align_strong_points( AF_GlyphHints hints, AF_Dimension dim ); FT_LOCAL( void ) af_glyph_hints_align_weak_points( AF_GlyphHints hints, AF_Dimension dim ); FT_LOCAL( void ) af_glyph_hints_done( AF_GlyphHints hints ); /* */ FT_END_HEADER #endif /* __AFHINTS_H__ */