forked from minhngoc25a/freetype2
[autofit] Show `near' points in tracing.
* src/autofit/afhints.h (AF_FLAG_NEAR): New macro. * src/autofit/afhints.c (af_glyph_hints_dump_points): Implement it. (af_glyph_hints_reload): Handle AF_FLAG_NEAR.
This commit is contained in:
Werner Lemberg
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8e8bb126d1
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709486db7f
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@ -1,3 +1,12 @@
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2016-03-20 Werner Lemberg <wl@gnu.org>
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[autofit] Show `near' points in tracing.
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* src/autofit/afhints.h (AF_FLAG_NEAR): New macro.
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* src/autofit/afhints.c (af_glyph_hints_dump_points): Implement it.
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(af_glyph_hints_reload): Handle AF_FLAG_NEAR.
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2016-03-18 Alexei Podtelezhnikov <apodtele@gmail.com>
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[smooth] Minor refactoring and microoptimizations.
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@ -314,7 +314,7 @@
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AF_DUMP(( "Table of points:\n" ));
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if ( hints->num_points )
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AF_DUMP(( " index hedge hseg vedge vseg flags"
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AF_DUMP(( " index hedge hseg vedge vseg flags "
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" xorg yorg xscale yscale xfit yfit" ));
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else
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AF_DUMP(( " (none)\n" ));
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@ -335,7 +335,7 @@
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contour++;
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}
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AF_DUMP(( " %5d %5s %5s %5s %5s %s "
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AF_DUMP(( " %5d %5s %5s %5s %5s %s"
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" %5d %5d %7.2f %7.2f %7.2f %7.2f\n",
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point_idx,
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af_print_idx( buf1,
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@ -344,8 +344,11 @@
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af_print_idx( buf3,
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af_get_edge_index( hints, segment_idx_0, 0 ) ),
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af_print_idx( buf4, segment_idx_0 ),
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( point->flags & AF_FLAG_WEAK_INTERPOLATION ) ? "weak"
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: " -- ",
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( point->flags & AF_FLAG_NEAR )
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? " near "
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: ( point->flags & AF_FLAG_WEAK_INTERPOLATION )
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? " weak "
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: "strong",
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point->fx,
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point->fy,
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@ -813,18 +816,29 @@
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AF_Point point;
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AF_Point point_limit = points + hints->num_points;
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/* value 20 in `near_limit' is heuristic */
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FT_UInt units_per_em = hints->metrics->scaler.face->units_per_EM;
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FT_Int near_limit = 20 * units_per_em / 2048;
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/* compute coordinates & Bezier flags, next and prev */
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{
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FT_Vector* vec = outline->points;
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char* tag = outline->tags;
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AF_Point end = points + outline->contours[0];
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FT_Short endpoint = outline->contours[0];
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AF_Point end = points + endpoint;
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AF_Point prev = end;
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FT_Int contour_index = 0;
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end->fx = (FT_Short)vec[endpoint].x;
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end->fy = (FT_Short)vec[endpoint].y;
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for ( point = points; point < point_limit; point++, vec++, tag++ )
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{
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FT_Pos out_x, out_y;
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point->in_dir = (FT_Char)AF_DIR_NONE;
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point->out_dir = (FT_Char)AF_DIR_NONE;
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@ -845,6 +859,12 @@
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point->flags = AF_FLAG_NONE;
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}
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out_x = point->fx - prev->fx;
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out_y = point->fy - prev->fy;
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if ( FT_ABS( out_x ) + FT_ABS( out_y ) < near_limit )
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prev->flags |= AF_FLAG_NEAR;
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point->prev = prev;
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prev->next = point;
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prev = point;
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@ -853,8 +873,13 @@
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{
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if ( ++contour_index < outline->n_contours )
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{
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end = points + outline->contours[contour_index];
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endpoint = outline->contours[contour_index];
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end = points + endpoint;
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prev = end;
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end->fx = (FT_Short)vec[endpoint].x;
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end->fy = (FT_Short)vec[endpoint].y;
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}
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}
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}
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@ -880,17 +905,15 @@
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* Compute directions of `in' and `out' vectors.
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*
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* Note that distances between points that are very near to each
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* other are accumulated. In other words, the auto-hinter
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* other are accumulated. In other words, the auto-hinter either
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* prepends the small vectors between near points to the first
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* non-near vector. All intermediate points are tagged as
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* weak; the directions are adjusted also to be equal to the
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* accumulated one.
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* non-near vector, or the sum of small vector lengths exceeds a
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* threshold, thus `grouping' the small vectors. All intermediate
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* points are tagged as weak; the directions are adjusted also to
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* be equal to the accumulated one.
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*/
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/* value 20 in `near_limit' is heuristic */
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FT_UInt units_per_em = hints->metrics->scaler.face->units_per_EM;
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FT_Int near_limit = 20 * units_per_em / 2048;
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FT_Int near_limit2 = 2 * near_limit - 1;
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FT_Int near_limit2 = 2 * near_limit - 1;
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AF_Point* contour;
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AF_Point* contour_limit = hints->contours + hints->num_contours;
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@ -937,7 +960,7 @@
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/* now loop over all points of the contour to get */
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/* `in' and `out' vector directions */
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curr = first;
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curr = first;
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/*
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* We abuse the `u' and `v' fields to store index deltas to the
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@ -960,7 +983,7 @@
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point = next;
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next = point->next;
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next = point->next;
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out_x += next->fx - point->fx;
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out_y += next->fy - point->fy;
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@ -221,6 +221,9 @@ FT_BEGIN_HEADER
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/* candidates for weak interpolation have this flag set */
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#define AF_FLAG_WEAK_INTERPOLATION ( 1U << 4 )
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/* the distance to the next point is very small */
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#define AF_FLAG_NEAR ( 1U << 5 )
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/* edge hint flags */
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#define AF_EDGE_NORMAL 0
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