X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=libraries%2Ffreetype-2.0.5%2Finclude%2Fahtypes.h;fp=libraries%2Ffreetype-2.0.5%2Finclude%2Fahtypes.h;h=2b7b4f072842f81e275373eb604e9e011f8881d6;hb=a1fe8fd19bb4f558150e52c0624869667b739877;hp=0000000000000000000000000000000000000000;hpb=e8f4081448f258adfbfa962b75d8392a7e152849;p=rrdtool.git diff --git a/libraries/freetype-2.0.5/include/ahtypes.h b/libraries/freetype-2.0.5/include/ahtypes.h new file mode 100644 index 0000000..2b7b4f0 --- /dev/null +++ b/libraries/freetype-2.0.5/include/ahtypes.h @@ -0,0 +1,493 @@ +/***************************************************************************/ +/* */ +/* ahtypes.h */ +/* */ +/* General types and definitions for the auto-hint module */ +/* (specification only). */ +/* */ +/* Copyright 2000-2001 Catharon Productions Inc. */ +/* Author: David Turner */ +/* */ +/* This file is part of the Catharon Typography Project and shall only */ +/* be used, modified, and distributed under the terms of the Catharon */ +/* Open Source License that should come with this file under the name */ +/* `CatharonLicense.txt'. By continuing to use, modify, or distribute */ +/* this file you indicate that you have read the license and */ +/* understand and accept it fully. */ +/* */ +/* Note that this license is compatible with the FreeType license. */ +/* */ +/***************************************************************************/ + + +#ifndef __AHTYPES_H__ +#define __AHTYPES_H__ + + +#include +#include FT_INTERNAL_OBJECTS_H +#include "ahloader.h" + + +#define xxAH_DEBUG + + +#ifdef AH_DEBUG + +#include +#define AH_LOG( x ) printf ## x + +#else + +#define AH_LOG( x ) do ; while ( 0 ) /* nothing */ + +#endif /* AH_DEBUG */ + + +FT_BEGIN_HEADER + + + /*************************************************************************/ + /*************************************************************************/ + /*************************************************************************/ + /**** ****/ + /**** COMPILE-TIME BUILD OPTIONS ****/ + /**** ****/ + /**** Toggle these configuration macros to experiment with `features' ****/ + /**** of the auto-hinter. ****/ + /**** ****/ + /*************************************************************************/ + /*************************************************************************/ + /*************************************************************************/ + + + /*************************************************************************/ + /* */ + /* If this option is defined, only strong interpolation will be used to */ + /* place the points between edges. Otherwise, `smooth' points are */ + /* detected and later hinted through weak interpolation to correct some */ + /* unpleasant artefacts. */ + /* */ +#undef AH_OPTION_NO_WEAK_INTERPOLATION + + + /*************************************************************************/ + /* */ + /* If this option is defined, only weak interpolation will be used to */ + /* place the points between edges. Otherwise, `strong' points are */ + /* detected and later hinted through strong interpolation to correct */ + /* some unpleasant artefacts. */ + /* */ +#undef AH_OPTION_NO_STRONG_INTERPOLATION + + + /*************************************************************************/ + /* */ + /* Undefine this macro if you don't want to hint the metrics. There is */ + /* no reason to do this (at least for non-CJK scripts), except for */ + /* experimentation. */ + /* */ +#define AH_HINT_METRICS + + + /*************************************************************************/ + /* */ + /* Define this macro if you do not want to insert extra edges at a */ + /* glyph's x and y extremum (if there isn't one already available). */ + /* This helps to reduce a number of artefacts and allows hinting of */ + /* metrics. */ + /* */ +#undef AH_OPTION_NO_EXTREMUM_EDGES + + + /* don't touch for now */ +#define AH_MAX_WIDTHS 12 +#define AH_MAX_HEIGHTS 12 + + + /*************************************************************************/ + /*************************************************************************/ + /*************************************************************************/ + /**** ****/ + /**** TYPE DEFINITIONS ****/ + /**** ****/ + /*************************************************************************/ + /*************************************************************************/ + /*************************************************************************/ + + + /* see agangles.h */ + typedef FT_Int AH_Angle; + + + /* hint flags */ +#define ah_flah_none 0 + + /* bezier control points flags */ +#define ah_flah_conic 1 +#define ah_flah_cubic 2 +#define ah_flah_control ( ah_flah_conic | ah_flah_cubic ) + + /* extrema flags */ +#define ah_flah_extrema_x 4 +#define ah_flah_extrema_y 8 + + /* roundness */ +#define ah_flah_round_x 16 +#define ah_flah_round_y 32 + + /* touched */ +#define ah_flah_touch_x 64 +#define ah_flah_touch_y 128 + + /* weak interpolation */ +#define ah_flah_weak_interpolation 256 + + typedef FT_Int AH_Flags; + + + /* edge hint flags */ +#define ah_edge_normal 0 +#define ah_edge_round 1 +#define ah_edge_serif 2 +#define ah_edge_done 4 + + typedef FT_Int AH_Edge_Flags; + + + /* hint directions -- the values are computed so that two vectors are */ + /* in opposite directions iff `dir1+dir2 == 0' */ +#define ah_dir_none 4 +#define ah_dir_right 1 +#define ah_dir_left -1 +#define ah_dir_up 2 +#define ah_dir_down -2 + + typedef FT_Int AH_Direction; + + + typedef struct AH_Point AH_Point; + typedef struct AH_Segment AH_Segment; + typedef struct AH_Edge AH_Edge; + + + /*************************************************************************/ + /* */ + /* */ + /* AH_Point */ + /* */ + /* */ + /* A structure used to model an outline point to the AH_Outline type. */ + /* */ + /* */ + /* flags :: The current point hint flags. */ + /* */ + /* ox, oy :: The current original scaled coordinates. */ + /* */ + /* fx, fy :: The current coordinates in font units. */ + /* */ + /* x, y :: The current hinter coordinates. */ + /* */ + /* u, v :: Point coordinates -- meaning varies with context. */ + /* */ + /* in_dir :: The direction of the inwards vector (prev->point). */ + /* */ + /* out_dir :: The direction of the outwards vector (point->next). */ + /* */ + /* in_angle :: The angle of the inwards vector. */ + /* */ + /* out_angle :: The angle of the outwards vector. */ + /* */ + /* next :: The next point in same contour. */ + /* */ + /* prev :: The previous point in same contour. */ + /* */ + struct AH_Point + { + AH_Flags flags; /* point flags used by hinter */ + FT_Pos ox, oy; + FT_Pos fx, fy; + FT_Pos x, y; + FT_Pos u, v; + + AH_Direction in_dir; /* direction of inwards vector */ + AH_Direction out_dir; /* direction of outwards vector */ + + AH_Angle in_angle; + AH_Angle out_angle; + + AH_Point* next; /* next point in contour */ + AH_Point* prev; /* previous point in contour */ + }; + + + /*************************************************************************/ + /* */ + /* */ + /* AH_Segment */ + /* */ + /* */ + /* A structure used to describe an edge segment to the auto-hinter. */ + /* A segment is simply a sequence of successive points located on the */ + /* same horizontal or vertical `position', in a given direction. */ + /* */ + /* */ + /* flags :: The segment edge flags (straight, rounded, etc.). */ + /* */ + /* dir :: The segment direction. */ + /* */ + /* first :: The first point in the segment. */ + /* */ + /* last :: The last point in the segment. */ + /* */ + /* contour :: A pointer to the first point of the segment's */ + /* contour. */ + /* */ + /* pos :: The segment position in font units. */ + /* */ + /* size :: The segment size. */ + /* */ + /* edge :: The edge of the current segment. */ + /* */ + /* edge_next :: The next segment on the same edge. */ + /* */ + /* link :: The pairing segment for this edge. */ + /* */ + /* serif :: The primary segment for serifs. */ + /* */ + /* num_linked :: The number of other segments that link to this one. */ + /* */ + /* score :: Used to score the segment when selecting them. */ + /* */ + struct AH_Segment + { + AH_Edge_Flags flags; + AH_Direction dir; + + AH_Point* first; /* first point in edge segment */ + AH_Point* last; /* last point in edge segment */ + AH_Point** contour; /* ptr to first point of segment's contour */ + + FT_Pos pos; /* position of segment */ + FT_Pos min_coord; /* minimum coordinate of segment */ + FT_Pos max_coord; /* maximum coordinate of segment */ + + AH_Edge* edge; + AH_Segment* edge_next; + + AH_Segment* link; /* link segment */ + AH_Segment* serif; /* primary segment for serifs */ + FT_Pos num_linked; /* number of linked segments */ + FT_Int score; + }; + + + /*************************************************************************/ + /* */ + /* */ + /* AH_Edge */ + /* */ + /* */ + /* A structure used to describe an edge, which really is a horizontal */ + /* or vertical coordinate to be hinted depending on the segments */ + /* located on it. */ + /* */ + /* */ + /* flags :: The segment edge flags (straight, rounded, etc.). */ + /* */ + /* dir :: The main segment direction on this edge. */ + /* */ + /* first :: The first edge segment. */ + /* */ + /* last :: The last edge segment. */ + /* */ + /* fpos :: The original edge position in font units. */ + /* */ + /* opos :: The original scaled edge position. */ + /* */ + /* pos :: The hinted edge position. */ + /* */ + /* link :: The linked edge. */ + /* */ + /* serif :: The serif edge. */ + /* */ + /* num_paired :: The number of other edges that pair to this one. */ + /* */ + /* score :: Used to score the edge when selecting them. */ + /* */ + /* blue_edge :: Indicate the blue zone edge this edge is related to. */ + /* Only set for some of the horizontal edges in a Latin */ + /* font. */ + /* */ + struct AH_Edge + { + AH_Edge_Flags flags; + AH_Direction dir; + + AH_Segment* first; + AH_Segment* last; + + FT_Pos fpos; + FT_Pos opos; + FT_Pos pos; + + AH_Edge* link; + AH_Edge* serif; + FT_Int num_linked; + + FT_Int score; + FT_Pos* blue_edge; + }; + + + /* an outline as seen by the hinter */ + typedef struct AH_Outline_ + { + FT_Memory memory; + + AH_Direction vert_major_dir; /* vertical major direction */ + AH_Direction horz_major_dir; /* horizontal major direction */ + + FT_Fixed x_scale; + FT_Fixed y_scale; + FT_Pos edge_distance_threshold; + + FT_Int max_points; + FT_Int num_points; + AH_Point* points; + + FT_Int max_contours; + FT_Int num_contours; + AH_Point** contours; + + FT_Int num_hedges; + AH_Edge* horz_edges; + + FT_Int num_vedges; + AH_Edge* vert_edges; + + FT_Int num_hsegments; + AH_Segment* horz_segments; + + FT_Int num_vsegments; + AH_Segment* vert_segments; + + } AH_Outline; + + +#define ah_blue_capital_top 0 /* THEZOCQS */ +#define ah_blue_capital_bottom ( ah_blue_capital_top + 1 ) /* HEZLOCUS */ +#define ah_blue_small_top ( ah_blue_capital_bottom + 1 ) /* xzroesc */ +#define ah_blue_small_bottom ( ah_blue_small_top + 1 ) /* xzroesc */ +#define ah_blue_small_minor ( ah_blue_small_bottom + 1 ) /* pqgjy */ +#define ah_blue_max ( ah_blue_small_minor + 1 ) + + typedef FT_Int AH_Blue; + + +#define ah_hinter_monochrome 1 +#define ah_hinter_optimize 2 + + typedef FT_Int AH_Hinter_Flags; + + + /*************************************************************************/ + /* */ + /* */ + /* AH_Globals */ + /* */ + /* */ + /* Holds the global metrics for a given font face (be it in design */ + /* units or scaled pixel values). */ + /* */ + /* */ + /* num_widths :: The number of widths. */ + /* */ + /* num_heights :: The number of heights. */ + /* */ + /* widths :: Snap widths, including standard one. */ + /* */ + /* heights :: Snap height, including standard one. */ + /* */ + /* blue_refs :: The reference positions of blue zones. */ + /* */ + /* blue_shoots :: The overshoot positions of blue zones. */ + /* */ + typedef struct AH_Globals_ + { + FT_Int num_widths; + FT_Int num_heights; + + FT_Pos widths [AH_MAX_WIDTHS]; + FT_Pos heights[AH_MAX_HEIGHTS]; + + FT_Pos blue_refs [ah_blue_max]; + FT_Pos blue_shoots[ah_blue_max]; + + } AH_Globals; + + + /*************************************************************************/ + /* */ + /* */ + /* AH_Face_Globals */ + /* */ + /* */ + /* Holds the complete global metrics for a given font face (i.e., the */ + /* design units version + a scaled version + the current scales */ + /* used). */ + /* */ + /* */ + /* face :: A handle to the source face object */ + /* */ + /* design :: The globals in font design units. */ + /* */ + /* scaled :: Scaled globals in sub-pixel values. */ + /* */ + /* x_scale :: The current horizontal scale. */ + /* */ + /* y_scale :: The current vertical scale. */ + /* */ + typedef struct AH_Face_Globals_ + { + FT_Face face; + AH_Globals design; + AH_Globals scaled; + FT_Fixed x_scale; + FT_Fixed y_scale; + FT_Bool control_overshoot; + + } AH_Face_Globals; + + + typedef struct AH_Hinter + { + FT_Memory memory; + AH_Hinter_Flags flags; + + FT_Int algorithm; + FT_Face face; + + AH_Face_Globals* globals; + + AH_Outline* glyph; + + AH_Loader* loader; + FT_Vector pp1; + FT_Vector pp2; + + FT_Bool transformed; + FT_Vector trans_delta; + FT_Matrix trans_matrix; + + FT_Bool disable_horz_edges; + FT_Bool disable_vert_edges; + } AH_Hinter; + + +FT_END_HEADER + +#endif /* __AHTYPES_H__ */ + + +/* END */