Edit
kc3-lang/freetype/src/autofit/afhints.c
Werner Lemberg
- src/autofit/afhints.c
-
/***************************************************************************/ /* */ /* afhints.c */ /* */ /* Auto-fitter hinting routines (body). */ /* */ /* Copyright 2003, 2004, 2005, 2006, 2007 by */ /* David Turner, Robert Wilhelm, and Werner Lemberg. */ /* */ /* This file is part of the FreeType project, and may only be used, */ /* modified, and distributed under the terms of the FreeType project */ /* license, LICENSE.TXT. By continuing to use, modify, or distribute */ /* this file you indicate that you have read the license and */ /* understand and accept it fully. */ /* */ /***************************************************************************/ #include "afhints.h" #include "aferrors.h" #include FT_INTERNAL_CALC_H FT_LOCAL_DEF( FT_Error ) af_axis_hints_new_segment( AF_AxisHints axis, FT_Memory memory, AF_Segment *asegment ) { FT_Error error = AF_Err_Ok; AF_Segment segment = NULL; if ( axis->num_segments >= axis->max_segments ) { FT_Int old_max = axis->max_segments; FT_Int new_max = old_max; FT_Int big_max = FT_INT_MAX / sizeof ( *segment ); if ( old_max >= big_max ) { error = AF_Err_Out_Of_Memory; goto Exit; } new_max += ( new_max >> 2 ) + 4; if ( new_max < old_max || new_max > big_max ) new_max = big_max; if ( FT_RENEW_ARRAY( axis->segments, old_max, new_max ) ) goto Exit; axis->max_segments = new_max; } segment = axis->segments + axis->num_segments++; Exit: *asegment = segment; return error; } FT_LOCAL( FT_Error ) af_axis_hints_new_edge( AF_AxisHints axis, FT_Int fpos, AF_Direction dir, FT_Memory memory, AF_Edge *aedge ) { FT_Error error = AF_Err_Ok; AF_Edge edge = NULL; AF_Edge edges; if ( axis->num_edges >= axis->max_edges ) { FT_Int old_max = axis->max_edges; FT_Int new_max = old_max; FT_Int big_max = FT_INT_MAX / sizeof ( *edge ); if ( old_max >= big_max ) { error = AF_Err_Out_Of_Memory; goto Exit; } new_max += ( new_max >> 2 ) + 4; if ( new_max < old_max || new_max > big_max ) new_max = big_max; if ( FT_RENEW_ARRAY( axis->edges, old_max, new_max ) ) goto Exit; axis->max_edges = new_max; } edges = axis->edges; edge = edges + axis->num_edges; while ( edge > edges ) { if ( edge[-1].fpos < fpos ) break; /* we want the edge with same position and minor direction */ /* to appear before those in the major one in the list */ if ( edge[-1].fpos == fpos && dir == axis->major_dir ) break; edge[0] = edge[-1]; edge--; } axis->num_edges++; FT_ZERO( edge ); edge->fpos = (FT_Short)fpos; edge->dir = (FT_Char)dir; Exit: *aedge = edge; return error; } #ifdef AF_DEBUG #include <stdio.h> static const char* af_dir_str( AF_Direction dir ) { const char* result; switch ( dir ) { case AF_DIR_UP: result = "up"; break; case AF_DIR_DOWN: result = "down"; break; case AF_DIR_LEFT: result = "left"; break; case AF_DIR_RIGHT: result = "right"; break; default: result = "none"; } return result; } #define AF_INDEX_NUM( ptr, base ) ( (ptr) ? ( (ptr) - (base) ) : -1 ) void af_glyph_hints_dump_points( AF_GlyphHints hints ) { AF_Point points = hints->points; AF_Point limit = points + hints->num_points; AF_Point point; printf( "Table of points:\n" ); printf( " [ index | xorg | yorg | xscale | yscale " "| xfit | yfit | flags ]\n" ); for ( point = points; point < limit; point++ ) { printf( " [ %5d | %5d | %5d | %-5.2f | %-5.2f " "| %-5.2f | %-5.2f | %c%c%c%c%c%c ]\n", point - points, point->fx, point->fy, point->ox/64.0, point->oy/64.0, point->x/64.0, point->y/64.0, ( point->flags & AF_FLAG_WEAK_INTERPOLATION ) ? 'w' : ' ', ( point->flags & AF_FLAG_INFLECTION ) ? 'i' : ' ', ( point->flags & AF_FLAG_EXTREMA_X ) ? '<' : ' ', ( point->flags & AF_FLAG_EXTREMA_Y ) ? 'v' : ' ', ( point->flags & AF_FLAG_ROUND_X ) ? '(' : ' ', ( point->flags & AF_FLAG_ROUND_Y ) ? 'u' : ' '); } printf( "\n" ); } static const char* af_edge_flags_to_string( AF_Edge_Flags flags ) { static char temp[32]; int pos = 0; if ( flags & AF_EDGE_ROUND ) { memcpy( temp + pos, "round", 5 ); pos += 5; } if ( flags & AF_EDGE_SERIF ) { if ( pos > 0 ) temp[pos++] = ' '; memcpy( temp + pos, "serif", 5 ); pos += 5; } if ( pos == 0 ) return "normal"; temp[pos] = 0; return temp; } /* A function to dump the array of linked segments. */ void af_glyph_hints_dump_segments( AF_GlyphHints hints ) { FT_Int dimension; for ( dimension = 1; dimension >= 0; dimension-- ) { AF_AxisHints axis = &hints->axis[dimension]; AF_Segment segments = axis->segments; AF_Segment limit = segments + axis->num_segments; AF_Segment seg; printf ( "Table of %s segments:\n", dimension == AF_DIMENSION_HORZ ? "vertical" : "horizontal" ); printf ( " [ index | pos | dir | link | serif |" " height | extra | flags ]\n" ); for ( seg = segments; seg < limit; seg++ ) { printf ( " [ %5d | %5.2g | %5s | %4d | %5d | %5d | %5d | %s ]\n", seg - segments, dimension == AF_DIMENSION_HORZ ? (int)seg->first->ox / 64.0 : (int)seg->first->oy / 64.0, af_dir_str( (AF_Direction)seg->dir ), AF_INDEX_NUM( seg->link, segments ), AF_INDEX_NUM( seg->serif, segments ), seg->height, seg->height - ( seg->max_coord - seg->min_coord ), af_edge_flags_to_string( seg->flags ) ); } printf( "\n" ); } } void af_glyph_hints_dump_edges( AF_GlyphHints hints ) { FT_Int dimension; for ( dimension = 1; dimension >= 0; dimension-- ) { AF_AxisHints axis = &hints->axis[dimension]; AF_Edge edges = axis->edges; AF_Edge limit = edges + axis->num_edges; AF_Edge edge; /* * note: AF_DIMENSION_HORZ corresponds to _vertical_ edges * since they have constant a X coordinate. */ printf ( "Table of %s edges:\n", dimension == AF_DIMENSION_HORZ ? "vertical" : "horizontal" ); printf ( " [ index | pos | dir | link |" " serif | blue | opos | pos | flags ]\n" ); for ( edge = edges; edge < limit; edge++ ) { printf ( " [ %5d | %5.2g | %5s | %4d |" " %5d | %c | %5.2f | %5.2f | %s ]\n", edge - edges, (int)edge->opos / 64.0, af_dir_str( (AF_Direction)edge->dir ), AF_INDEX_NUM( edge->link, edges ), AF_INDEX_NUM( edge->serif, edges ), edge->blue_edge ? 'y' : 'n', edge->opos / 64.0, edge->pos / 64.0, af_edge_flags_to_string( edge->flags ) ); } printf( "\n" ); } } #else /* !AF_DEBUG */ /* these empty stubs are only used to link the `ftgrid' test program */ /* when debugging is disabled */ void af_glyph_hints_dump_points( AF_GlyphHints hints ) { FT_UNUSED( hints ); } void af_glyph_hints_dump_segments( AF_GlyphHints hints ) { FT_UNUSED( hints ); } void af_glyph_hints_dump_edges( AF_GlyphHints hints ) { FT_UNUSED( hints ); } #endif /* !AF_DEBUG */ /* compute the direction value of a given vector */ FT_LOCAL_DEF( AF_Direction ) af_direction_compute( FT_Pos dx, FT_Pos dy ) { FT_Pos ll, ss; /* long and short arm lengths */ AF_Direction dir; /* candidate direction */ if ( dy >= dx ) { if ( dy >= -dx ) { dir = AF_DIR_UP; ll = dy; ss = dx; } else { dir = AF_DIR_LEFT; ll = -dx; ss = dy; } } else /* dy < dx */ { if ( dy >= -dx ) { dir = AF_DIR_RIGHT; ll = dx; ss = dy; } else { dir = AF_DIR_DOWN; ll = dy; ss = dx; } } ss *= 14; if ( FT_ABS( ll ) <= FT_ABS( ss ) ) dir = AF_DIR_NONE; return dir; } /* compute all inflex points in a given glyph */ static void af_glyph_hints_compute_inflections( AF_GlyphHints hints ) { AF_Point* contour = hints->contours; AF_Point* contour_limit = contour + hints->num_contours; /* do each contour separately */ for ( ; contour < contour_limit; contour++ ) { AF_Point point = contour[0]; AF_Point first = point; AF_Point start = point; AF_Point end = point; AF_Point before; AF_Point after; FT_Pos in_x, in_y, out_x, out_y; AF_Angle orient_prev, orient_cur; FT_Int finished = 0; /* compute first segment in contour */ first = point; start = end = first; do { end = end->next; if ( end == first ) goto Skip; in_x = end->fx - start->fx; in_y = end->fy - start->fy; } while ( in_x == 0 && in_y == 0 ); /* extend the segment start whenever possible */ before = start; do { do { start = before; before = before->prev; if ( before == first ) goto Skip; out_x = start->fx - before->fx; out_y = start->fy - before->fy; } while ( out_x == 0 && out_y == 0 ); orient_prev = ft_corner_orientation( in_x, in_y, out_x, out_y ); } while ( orient_prev == 0 ); first = start; in_x = out_x; in_y = out_y; /* now process all segments in the contour */ do { /* first, extend current segment's end whenever possible */ after = end; do { do { end = after; after = after->next; if ( after == first ) finished = 1; out_x = after->fx - end->fx; out_y = after->fy - end->fy; } while ( out_x == 0 && out_y == 0 ); orient_cur = ft_corner_orientation( in_x, in_y, out_x, out_y ); } while ( orient_cur == 0 ); if ( ( orient_prev + orient_cur ) == 0 ) { /* we have an inflection point here */ do { start->flags |= AF_FLAG_INFLECTION; start = start->next; } while ( start != end ); start->flags |= AF_FLAG_INFLECTION; } start = end; end = after; orient_prev = orient_cur; in_x = out_x; in_y = out_y; } while ( !finished ); Skip: ; } } FT_LOCAL_DEF( void ) af_glyph_hints_init( AF_GlyphHints hints, FT_Memory memory ) { FT_ZERO( hints ); hints->memory = memory; } FT_LOCAL_DEF( void ) af_glyph_hints_done( AF_GlyphHints hints ) { if ( hints && hints->memory ) { FT_Memory memory = hints->memory; int dim; /* * note that we don't need to free the segment and edge * buffers, since they are really within the hints->points array */ for ( dim = 0; dim < AF_DIMENSION_MAX; dim++ ) { AF_AxisHints axis = &hints->axis[dim]; axis->num_segments = 0; axis->max_segments = 0; FT_FREE( axis->segments ); axis->num_edges = 0; axis->max_edges = 0; FT_FREE( axis->edges ); } FT_FREE( hints->contours ); hints->max_contours = 0; hints->num_contours = 0; FT_FREE( hints->points ); hints->num_points = 0; hints->max_points = 0; hints->memory = NULL; } } FT_LOCAL_DEF( void ) af_glyph_hints_rescale( AF_GlyphHints hints, AF_ScriptMetrics metrics ) { hints->metrics = metrics; hints->scaler_flags = metrics->scaler.flags; } FT_LOCAL_DEF( FT_Error ) af_glyph_hints_reload( AF_GlyphHints hints, FT_Outline* outline, FT_Bool get_inflections ) { FT_Error error = AF_Err_Ok; AF_Point points; FT_UInt old_max, new_max; FT_Fixed x_scale = hints->x_scale; FT_Fixed y_scale = hints->y_scale; FT_Pos x_delta = hints->x_delta; FT_Pos y_delta = hints->y_delta; FT_Memory memory = hints->memory; hints->num_points = 0; hints->num_contours = 0; hints->axis[0].num_segments = 0; hints->axis[0].num_edges = 0; hints->axis[1].num_segments = 0; hints->axis[1].num_edges = 0; /* first of all, reallocate the contours array when necessary */ new_max = (FT_UInt)outline->n_contours; old_max = hints->max_contours; if ( new_max > old_max ) { new_max = ( new_max + 3 ) & ~3; if ( FT_RENEW_ARRAY( hints->contours, old_max, new_max ) ) goto Exit; hints->max_contours = new_max; } /* * then reallocate the points arrays if necessary -- * note that we reserve two additional point positions, used to * hint metrics appropriately */ new_max = (FT_UInt)( outline->n_points + 2 ); old_max = hints->max_points; if ( new_max > old_max ) { new_max = ( new_max + 2 + 7 ) & ~7; if ( FT_RENEW_ARRAY( hints->points, old_max, new_max ) ) goto Exit; hints->max_points = new_max; } hints->num_points = outline->n_points; hints->num_contours = outline->n_contours; /* We can't rely on the value of `FT_Outline.flags' to know the fill */ /* direction used for a glyph, given that some fonts are broken (e.g., */ /* the Arphic ones). We thus recompute it each time we need to. */ /* */ hints->axis[AF_DIMENSION_HORZ].major_dir = AF_DIR_UP; hints->axis[AF_DIMENSION_VERT].major_dir = AF_DIR_LEFT; if ( FT_Outline_Get_Orientation( outline ) == FT_ORIENTATION_POSTSCRIPT ) { hints->axis[AF_DIMENSION_HORZ].major_dir = AF_DIR_DOWN; hints->axis[AF_DIMENSION_VERT].major_dir = AF_DIR_RIGHT; } hints->x_scale = x_scale; hints->y_scale = y_scale; hints->x_delta = x_delta; hints->y_delta = y_delta; hints->xmin_delta = 0; hints->xmax_delta = 0; points = hints->points; if ( hints->num_points == 0 ) goto Exit; { AF_Point point; AF_Point point_limit = points + hints->num_points; /* compute coordinates & Bezier flags, next and prev */ { FT_Vector* vec = outline->points; char* tag = outline->tags; AF_Point first = points; AF_Point end = points + outline->contours[0]; AF_Point prev = end; FT_Int contour_index = 0; for ( point = points; point < point_limit; point++, vec++, tag++ ) { point->fx = (FT_Short)vec->x; point->fy = (FT_Short)vec->y; point->ox = point->x = FT_MulFix( vec->x, x_scale ) + x_delta; point->oy = point->y = FT_MulFix( vec->y, y_scale ) + y_delta; switch ( FT_CURVE_TAG( *tag ) ) { case FT_CURVE_TAG_CONIC: point->flags = AF_FLAG_CONIC; break; case FT_CURVE_TAG_CUBIC: point->flags = AF_FLAG_CUBIC; break; default: point->flags = 0; } point->prev = prev; prev->next = point; prev = point; if ( point == end ) { if ( ++contour_index < outline->n_contours ) { first = point + 1; end = points + outline->contours[contour_index]; prev = end; } } } } /* set-up the contours array */ { AF_Point* contour = hints->contours; AF_Point* contour_limit = contour + hints->num_contours; short* end = outline->contours; short idx = 0; for ( ; contour < contour_limit; contour++, end++ ) { contour[0] = points + idx; idx = (short)( end[0] + 1 ); } } /* compute directions of in & out vectors */ { AF_Point first = points; AF_Point prev = NULL; FT_Pos in_x = 0; FT_Pos in_y = 0; AF_Direction in_dir = AF_DIR_NONE; for ( point = points; point < point_limit; point++ ) { AF_Point next; FT_Pos out_x, out_y; if ( point == first ) { prev = first->prev; in_x = first->fx - prev->fx; in_y = first->fy - prev->fy; in_dir = af_direction_compute( in_x, in_y ); first = prev + 1; } point->in_dir = (FT_Char)in_dir; next = point->next; out_x = next->fx - point->fx; out_y = next->fy - point->fy; in_dir = af_direction_compute( out_x, out_y ); point->out_dir = (FT_Char)in_dir; if ( point->flags & ( AF_FLAG_CONIC | AF_FLAG_CUBIC ) ) { Is_Weak_Point: point->flags |= AF_FLAG_WEAK_INTERPOLATION; } else if ( point->out_dir == point->in_dir ) { if ( point->out_dir != AF_DIR_NONE ) goto Is_Weak_Point; if ( ft_corner_is_flat( in_x, in_y, out_x, out_y ) ) goto Is_Weak_Point; } else if ( point->in_dir == -point->out_dir ) goto Is_Weak_Point; in_x = out_x; in_y = out_y; prev = point; } } } /* compute inflection points -- */ /* disabled due to no longer perceived benefits */ if ( 0 && get_inflections ) af_glyph_hints_compute_inflections( hints ); Exit: return error; } FT_LOCAL_DEF( void ) af_glyph_hints_save( AF_GlyphHints hints, FT_Outline* outline ) { AF_Point point = hints->points; AF_Point limit = point + hints->num_points; FT_Vector* vec = outline->points; char* tag = outline->tags; for ( ; point < limit; point++, vec++, tag++ ) { vec->x = point->x; vec->y = point->y; if ( point->flags & AF_FLAG_CONIC ) tag[0] = FT_CURVE_TAG_CONIC; else if ( point->flags & AF_FLAG_CUBIC ) tag[0] = FT_CURVE_TAG_CUBIC; else tag[0] = FT_CURVE_TAG_ON; } } /**************************************************************** * * EDGE POINT GRID-FITTING * ****************************************************************/ FT_LOCAL_DEF( void ) af_glyph_hints_align_edge_points( AF_GlyphHints hints, AF_Dimension dim ) { AF_AxisHints axis = & hints->axis[dim]; AF_Segment segments = axis->segments; AF_Segment segment_limit = segments + axis->num_segments; AF_Segment seg; if ( dim == AF_DIMENSION_HORZ ) { for ( seg = segments; seg < segment_limit; seg++ ) { AF_Edge edge = seg->edge; AF_Point point, first, last; if ( edge == NULL ) continue; first = seg->first; last = seg->last; point = first; for (;;) { point->x = edge->pos; point->flags |= AF_FLAG_TOUCH_X; if ( point == last ) break; point = point->next; } } } else { for ( seg = segments; seg < segment_limit; seg++ ) { AF_Edge edge = seg->edge; AF_Point point, first, last; if ( edge == NULL ) continue; first = seg->first; last = seg->last; point = first; for (;;) { point->y = edge->pos; point->flags |= AF_FLAG_TOUCH_Y; if ( point == last ) break; point = point->next; } } } } /**************************************************************** * * STRONG POINT INTERPOLATION * ****************************************************************/ /* hint the strong points -- this is equivalent to the TrueType `IP' */ /* hinting instruction */ FT_LOCAL_DEF( void ) af_glyph_hints_align_strong_points( AF_GlyphHints hints, AF_Dimension dim ) { AF_Point points = hints->points; AF_Point point_limit = points + hints->num_points; AF_AxisHints axis = &hints->axis[dim]; AF_Edge edges = axis->edges; AF_Edge edge_limit = edges + axis->num_edges; AF_Flags touch_flag; if ( dim == AF_DIMENSION_HORZ ) touch_flag = AF_FLAG_TOUCH_X; else touch_flag = AF_FLAG_TOUCH_Y; if ( edges < edge_limit ) { AF_Point point; AF_Edge edge; for ( point = points; point < point_limit; point++ ) { FT_Pos u, ou, fu; /* point position */ FT_Pos delta; if ( point->flags & touch_flag ) continue; /* if this point is candidate to weak interpolation, we */ /* interpolate it after all strong points have been processed */ if ( ( point->flags & AF_FLAG_WEAK_INTERPOLATION ) && !( point->flags & AF_FLAG_INFLECTION ) ) continue; if ( dim == AF_DIMENSION_VERT ) { u = point->fy; ou = point->oy; } else { u = point->fx; ou = point->ox; } fu = u; /* is the point before the first edge? */ edge = edges; delta = edge->fpos - u; if ( delta >= 0 ) { u = edge->pos - ( edge->opos - ou ); goto Store_Point; } /* is the point after the last edge? */ edge = edge_limit - 1; delta = u - edge->fpos; if ( delta >= 0 ) { u = edge->pos + ( ou - edge->opos ); goto Store_Point; } { FT_UInt min, max, mid; FT_Pos fpos; /* find enclosing edges */ min = 0; max = edge_limit - edges; #if 1 /* for small edge counts, a linear search is better */ if ( max <= 8 ) { FT_UInt nn; for ( nn = 0; nn < max; nn++ ) if ( edges[nn].fpos >= u ) break; if ( edges[nn].fpos == u ) { u = edges[nn].pos; goto Store_Point; } min = nn; } else #endif while ( min < max ) { mid = ( max + min ) >> 1; edge = edges + mid; fpos = edge->fpos; if ( u < fpos ) max = mid; else if ( u > fpos ) min = mid + 1; else { /* we are on the edge */ u = edge->pos; goto Store_Point; } } { AF_Edge before = edges + min - 1; AF_Edge after = edges + min + 0; /* assert( before && after && before != after ) */ if ( before->scale == 0 ) before->scale = FT_DivFix( after->pos - before->pos, after->fpos - before->fpos ); u = before->pos + FT_MulFix( fu - before->fpos, before->scale ); } } Store_Point: /* save the point position */ if ( dim == AF_DIMENSION_HORZ ) point->x = u; else point->y = u; point->flags |= touch_flag; } } } /**************************************************************** * * WEAK POINT INTERPOLATION * ****************************************************************/ static void af_iup_shift( AF_Point p1, AF_Point p2, AF_Point ref ) { AF_Point p; FT_Pos delta = ref->u - ref->v; if ( delta == 0 ) return; for ( p = p1; p < ref; p++ ) p->u = p->v + delta; for ( p = ref + 1; p <= p2; p++ ) p->u = p->v + delta; } static void af_iup_interp( AF_Point p1, AF_Point p2, AF_Point ref1, AF_Point ref2 ) { AF_Point p; FT_Pos u; FT_Pos v1 = ref1->v; FT_Pos v2 = ref2->v; FT_Pos d1 = ref1->u - v1; FT_Pos d2 = ref2->u - v2; if ( p1 > p2 ) return; if ( v1 == v2 ) { for ( p = p1; p <= p2; p++ ) { u = p->v; if ( u <= v1 ) u += d1; else u += d2; p->u = u; } return; } if ( v1 < v2 ) { for ( p = p1; p <= p2; p++ ) { u = p->v; if ( u <= v1 ) u += d1; else if ( u >= v2 ) u += d2; else u = ref1->u + FT_MulDiv( u - v1, ref2->u - ref1->u, v2 - v1 ); p->u = u; } } else { for ( p = p1; p <= p2; p++ ) { u = p->v; if ( u <= v2 ) u += d2; else if ( u >= v1 ) u += d1; else u = ref1->u + FT_MulDiv( u - v1, ref2->u - ref1->u, v2 - v1 ); p->u = u; } } } FT_LOCAL_DEF( void ) af_glyph_hints_align_weak_points( AF_GlyphHints hints, AF_Dimension dim ) { AF_Point points = hints->points; AF_Point point_limit = points + hints->num_points; AF_Point* contour = hints->contours; AF_Point* contour_limit = contour + hints->num_contours; AF_Flags touch_flag; AF_Point point; AF_Point end_point; AF_Point first_point; /* PASS 1: Move segment points to edge positions */ if ( dim == AF_DIMENSION_HORZ ) { touch_flag = AF_FLAG_TOUCH_X; for ( point = points; point < point_limit; point++ ) { point->u = point->x; point->v = point->ox; } } else { touch_flag = AF_FLAG_TOUCH_Y; for ( point = points; point < point_limit; point++ ) { point->u = point->y; point->v = point->oy; } } point = points; for ( ; contour < contour_limit; contour++ ) { AF_Point first_touched, last_touched; point = *contour; end_point = point->prev; first_point = point; /* find first touched point */ for (;;) { if ( point > end_point ) /* no touched point in contour */ goto NextContour; if ( point->flags & touch_flag ) break; point++; } first_touched = point; last_touched = point; for (;;) { FT_ASSERT( point <= end_point && ( point->flags & touch_flag ) != 0 ); /* skip any touched neighbhours */ while ( point < end_point && ( point[1].flags & touch_flag ) != 0 ) point++; last_touched = point; /* find the next touched point, if any */ point ++; for (;;) { if ( point > end_point ) goto EndContour; if ( ( point->flags & touch_flag ) != 0 ) break; point++; } /* interpolate between last_touched and point */ af_iup_interp( last_touched + 1, point - 1, last_touched, point ); } EndContour: /* special case: only one point was touched */ if ( last_touched == first_touched ) { af_iup_shift( first_point, end_point, first_touched ); } else /* interpolate the last part */ { if ( last_touched < end_point ) af_iup_interp( last_touched + 1, end_point, last_touched, first_touched ); if ( first_touched > points ) af_iup_interp( first_point, first_touched - 1, last_touched, first_touched ); } NextContour: ; } /* now save the interpolated values back to x/y */ if ( dim == AF_DIMENSION_HORZ ) { for ( point = points; point < point_limit; point++ ) point->x = point->u; } else { for ( point = points; point < point_limit; point++ ) point->y = point->u; } } #ifdef AF_USE_WARPER FT_LOCAL_DEF( void ) af_glyph_hints_scale_dim( AF_GlyphHints hints, AF_Dimension dim, FT_Fixed scale, FT_Pos delta ) { AF_Point points = hints->points; AF_Point points_limit = points + hints->num_points; AF_Point point; if ( dim == AF_DIMENSION_HORZ ) { for ( point = points; point < points_limit; point++ ) point->x = FT_MulFix( point->fx, scale ) + delta; } else { for ( point = points; point < points_limit; point++ ) point->y = FT_MulFix( point->fy, scale ) + delta; } } #endif /* AF_USE_WARPER */ /* END */