/* */
/* aflatin.c */
/* */
-/* Auto-fitter hinting routines for latin script (body). */
+/* Auto-fitter hinting routines for latin writing system (body). */
/* */
-/* Copyright 2003-2011 by */
+/* Copyright 2003-2014 by */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
/* This file is part of the FreeType project, and may only be used, */
#include FT_ADVANCES_H
#include FT_INTERNAL_DEBUG_H
+#include "afglobal.h"
+#include "afpic.h"
#include "aflatin.h"
#include "aferrors.h"
FT_LOCAL_DEF( void )
af_latin_metrics_init_widths( AF_LatinMetrics metrics,
- FT_Face face,
- FT_ULong charcode )
+ FT_Face face )
{
/* scan the array of segments in each direction */
AF_GlyphHintsRec hints[1];
+ FT_TRACE5(( "\n"
+ "latin standard widths computation (style `%s')\n"
+ "=====================================================\n"
+ "\n",
+ af_style_names[metrics->root.style_class->style] ));
+
af_glyph_hints_init( hints, face->memory );
metrics->axis[AF_DIMENSION_HORZ].width_count = 0;
metrics->axis[AF_DIMENSION_VERT].width_count = 0;
{
- FT_Error error;
- FT_UInt glyph_index;
- int dim;
- AF_LatinMetricsRec dummy[1];
- AF_Scaler scaler = &dummy->root.scaler;
+ FT_Error error;
+ FT_ULong glyph_index;
+ FT_Long y_offset;
+ int dim;
+ AF_LatinMetricsRec dummy[1];
+ AF_Scaler scaler = &dummy->root.scaler;
+
+#ifdef FT_CONFIG_OPTION_PIC
+ AF_FaceGlobals globals = metrics->root.globals;
+#endif
+ AF_StyleClass style_class = metrics->root.style_class;
+ AF_ScriptClass script_class = AF_SCRIPT_CLASSES_GET
+ [style_class->script];
- glyph_index = FT_Get_Char_Index( face, charcode );
- if ( glyph_index == 0 )
- goto Exit;
+ FT_UInt32 standard_char;
+
+
+ /*
+ * We check more than a single standard character to catch features
+ * like `c2sc' (small caps from caps) that don't contain lowercase
+ * letters by definition, or other features that mainly operate on
+ * numerals.
+ */
+
+ standard_char = script_class->standard_char1;
+ af_get_char_index( &metrics->root,
+ standard_char,
+ &glyph_index,
+ &y_offset );
+ if ( !glyph_index )
+ {
+ if ( script_class->standard_char2 )
+ {
+ standard_char = script_class->standard_char2;
+ af_get_char_index( &metrics->root,
+ standard_char,
+ &glyph_index,
+ &y_offset );
+ if ( !glyph_index )
+ {
+ if ( script_class->standard_char3 )
+ {
+ standard_char = script_class->standard_char3;
+ af_get_char_index( &metrics->root,
+ standard_char,
+ &glyph_index,
+ &y_offset );
+ if ( !glyph_index )
+ goto Exit;
+ }
+ else
+ goto Exit;
+ }
+ }
+ else
+ goto Exit;
+ }
+
+ FT_TRACE5(( "standard character: U+%04lX (glyph index %d)\n",
+ standard_char, glyph_index ));
error = FT_Load_Glyph( face, glyph_index, FT_LOAD_NO_SCALE );
if ( error || face->glyph->outline.n_points <= 0 )
scaler->render_mode = FT_RENDER_MODE_NORMAL;
scaler->flags = 0;
- af_glyph_hints_rescale( hints, (AF_ScriptMetrics)dummy );
+ af_glyph_hints_rescale( hints, (AF_StyleMetrics)dummy );
error = af_glyph_hints_reload( hints, &face->glyph->outline );
if ( error )
if ( error )
goto Exit;
+ /*
+ * We assume that the glyphs selected for the stem width
+ * computation are `featureless' enough so that the linking
+ * algorithm works fine without adjustments of its scoring
+ * function.
+ */
af_latin_hints_link_segments( hints,
+ 0,
+ NULL,
(AF_Dimension)dim );
seg = axhints->segments;
}
}
- af_sort_widths( num_widths, axis->widths );
+ /* this also replaces multiple almost identical stem widths */
+ /* with a single one (the value 100 is heuristic) */
+ af_sort_and_quantize_widths( &num_widths, axis->widths,
+ dummy->units_per_em / 100 );
axis->width_count = num_widths;
}
- Exit:
+ Exit:
for ( dim = 0; dim < AF_DIMENSION_MAX; dim++ )
{
AF_LatinAxis axis = &metrics->axis[dim];
FT_Pos stdw;
- stdw = ( axis->width_count > 0 )
- ? axis->widths[0].org
- : AF_LATIN_CONSTANT( metrics, 50 );
+ stdw = ( axis->width_count > 0 ) ? axis->widths[0].org
+ : AF_LATIN_CONSTANT( metrics, 50 );
/* let's try 20% of the smallest width */
axis->edge_distance_threshold = stdw / 5;
axis->standard_width = stdw;
axis->extra_light = 0;
- }
- }
- af_glyph_hints_done( hints );
- }
+#ifdef FT_DEBUG_LEVEL_TRACE
+ {
+ FT_UInt i;
+ FT_TRACE5(( "%s widths:\n",
+ dim == AF_DIMENSION_VERT ? "horizontal"
+ : "vertical" ));
-#define AF_LATIN_MAX_TEST_CHARACTERS 12
+ FT_TRACE5(( " %d (standard)", axis->standard_width ));
+ for ( i = 1; i < axis->width_count; i++ )
+ FT_TRACE5(( " %d", axis->widths[i].org ));
+ FT_TRACE5(( "\n" ));
+ }
+#endif
+ }
+ }
- static const char af_latin_blue_chars[AF_LATIN_MAX_BLUES]
- [AF_LATIN_MAX_TEST_CHARACTERS + 1] =
- {
- "THEZOCQS",
- "HEZLOCUS",
- "fijkdbh",
- "xzroesc",
- "xzroesc",
- "pqgjy"
- };
+ FT_TRACE5(( "\n" ));
+
+ af_glyph_hints_done( hints );
+ }
/* Find all blue zones. Flat segments give the reference points, */
af_latin_metrics_init_blues( AF_LatinMetrics metrics,
FT_Face face )
{
- FT_Pos flats [AF_LATIN_MAX_TEST_CHARACTERS];
- FT_Pos rounds[AF_LATIN_MAX_TEST_CHARACTERS];
+ FT_Pos flats [AF_BLUE_STRING_MAX_LEN];
+ FT_Pos rounds[AF_BLUE_STRING_MAX_LEN];
+
FT_Int num_flats;
FT_Int num_rounds;
- FT_Int bb;
+
AF_LatinBlue blue;
FT_Error error;
- AF_LatinAxis axis = &metrics->axis[AF_DIMENSION_VERT];
- FT_GlyphSlot glyph = face->glyph;
+ AF_LatinAxis axis = &metrics->axis[AF_DIMENSION_VERT];
+ FT_Outline outline;
+
+ AF_StyleClass sc = metrics->root.style_class;
+
+ AF_Blue_Stringset bss = sc->blue_stringset;
+ const AF_Blue_StringRec* bs = &af_blue_stringsets[bss];
- /* we compute the blues simply by loading each character from the */
- /* `af_latin_blue_chars[blues]' string, then finding its top-most or */
- /* bottom-most points (depending on `AF_IS_TOP_BLUE') */
+ /* we walk over the blue character strings as specified in the */
+ /* style's entry in the `af_blue_stringset' array */
- FT_TRACE5(( "blue zones computation\n" ));
- FT_TRACE5(( "------------------------------------------------\n" ));
+ FT_TRACE5(( "latin blue zones computation\n"
+ "============================\n"
+ "\n" ));
- for ( bb = 0; bb < AF_LATIN_BLUE_MAX; bb++ )
+ for ( ; bs->string != AF_BLUE_STRING_MAX; bs++ )
{
- const char* p = af_latin_blue_chars[bb];
- const char* limit = p + AF_LATIN_MAX_TEST_CHARACTERS;
+ const char* p = &af_blue_strings[bs->string];
FT_Pos* blue_ref;
FT_Pos* blue_shoot;
- FT_TRACE5(( "blue %3d: ", bb ));
+#ifdef FT_DEBUG_LEVEL_TRACE
+ {
+ FT_Bool have_flag = 0;
+
+
+ FT_TRACE5(( "blue zone %d", axis->blue_count ));
+
+ if ( bs->properties )
+ {
+ FT_TRACE5(( " (" ));
+
+ if ( AF_LATIN_IS_TOP_BLUE( bs ) )
+ {
+ FT_TRACE5(( "top" ));
+ have_flag = 1;
+ }
+
+ if ( AF_LATIN_IS_NEUTRAL_BLUE( bs ) )
+ {
+ if ( have_flag )
+ FT_TRACE5(( ", " ));
+ FT_TRACE5(( "neutral" ));
+ have_flag = 1;
+ }
+
+ if ( AF_LATIN_IS_X_HEIGHT_BLUE( bs ) )
+ {
+ if ( have_flag )
+ FT_TRACE5(( ", " ));
+ FT_TRACE5(( "small top" ));
+ have_flag = 1;
+ }
+
+ if ( AF_LATIN_IS_LONG_BLUE( bs ) )
+ {
+ if ( have_flag )
+ FT_TRACE5(( ", " ));
+ FT_TRACE5(( "long" ));
+ }
+
+ FT_TRACE5(( ")" ));
+ }
+
+ FT_TRACE5(( ":\n" ));
+ }
+#endif /* FT_DEBUG_LEVEL_TRACE */
num_flats = 0;
num_rounds = 0;
- for ( ; p < limit && *p; p++ )
+ while ( *p )
{
- FT_UInt glyph_index;
+ FT_ULong ch;
+ FT_ULong glyph_index;
+ FT_Long y_offset;
FT_Pos best_y; /* same as points.y */
- FT_Int best_point, best_first, best_last;
+ FT_Int best_point, best_contour_first, best_contour_last;
FT_Vector* points;
FT_Bool round = 0;
- FT_TRACE5(( "'%c'", *p ));
+ GET_UTF8_CHAR( ch, p );
/* load the character in the face -- skip unknown or empty ones */
- glyph_index = FT_Get_Char_Index( face, (FT_UInt)*p );
+ af_get_char_index( &metrics->root, ch, &glyph_index, &y_offset );
if ( glyph_index == 0 )
+ {
+ FT_TRACE5(( " U+%04lX unavailable\n", ch ));
continue;
+ }
- error = FT_Load_Glyph( face, glyph_index, FT_LOAD_NO_SCALE );
- if ( error || glyph->outline.n_points <= 0 )
+ error = FT_Load_Glyph( face, glyph_index, FT_LOAD_NO_SCALE );
+ outline = face->glyph->outline;
+ if ( error || outline.n_points <= 0 )
+ {
+ FT_TRACE5(( " U+%04lX contains no outlines\n", ch ));
continue;
+ }
/* now compute min or max point indices and coordinates */
- points = glyph->outline.points;
- best_point = -1;
- best_y = 0; /* make compiler happy */
- best_first = 0; /* ditto */
- best_last = 0; /* ditto */
+ points = outline.points;
+ best_point = -1;
+ best_y = 0; /* make compiler happy */
+ best_contour_first = 0; /* ditto */
+ best_contour_last = 0; /* ditto */
{
FT_Int nn;
FT_Int last = -1;
- for ( nn = 0;
- nn < glyph->outline.n_contours;
- first = last + 1, nn++ )
+ for ( nn = 0; nn < outline.n_contours; first = last + 1, nn++ )
{
FT_Int old_best_point = best_point;
FT_Int pp;
- last = glyph->outline.contours[nn];
+ last = outline.contours[nn];
/* Avoid single-point contours since they are never rasterized. */
/* In some fonts, they correspond to mark attachment points */
- /* which are way outside of the glyph's real outline. */
+ /* that are way outside of the glyph's real outline. */
if ( last <= first )
continue;
- if ( AF_LATIN_IS_TOP_BLUE( bb ) )
+ if ( AF_LATIN_IS_TOP_BLUE( bs ) )
{
for ( pp = first; pp <= last; pp++ )
if ( best_point < 0 || points[pp].y > best_y )
if ( best_point != old_best_point )
{
- best_first = first;
- best_last = last;
+ best_contour_first = first;
+ best_contour_last = last;
}
}
- FT_TRACE5(( "%5d", best_y ));
}
/* now check whether the point belongs to a straight or round */
/* lies, then inspect its previous and next points */
if ( best_point >= 0 )
{
+ FT_Pos best_x = points[best_point].x;
FT_Int prev, next;
+ FT_Int best_segment_first, best_segment_last;
+ FT_Int best_on_point_first, best_on_point_last;
FT_Pos dist;
- /* now look for the previous and next points that are not on the */
- /* same Y coordinate. Threshold the `closeness'... */
+ best_segment_first = best_point;
+ best_segment_last = best_point;
+
+ if ( FT_CURVE_TAG( outline.tags[best_point] ) == FT_CURVE_TAG_ON )
+ {
+ best_on_point_first = best_point;
+ best_on_point_last = best_point;
+ }
+ else
+ {
+ best_on_point_first = -1;
+ best_on_point_last = -1;
+ }
+
+ /* look for the previous and next points on the contour */
+ /* that are not on the same Y coordinate, then threshold */
+ /* the `closeness'... */
prev = best_point;
next = prev;
do
{
- if ( prev > best_first )
+ if ( prev > best_contour_first )
prev--;
else
- prev = best_last;
+ prev = best_contour_last;
- dist = points[prev].y - best_y;
- if ( dist < -5 || dist > 5 )
- break;
+ dist = FT_ABS( points[prev].y - best_y );
+ /* accept a small distance or a small angle (both values are */
+ /* heuristic; value 20 corresponds to approx. 2.9 degrees) */
+ if ( dist > 5 )
+ if ( FT_ABS( points[prev].x - best_x ) <= 20 * dist )
+ break;
+
+ best_segment_first = prev;
+
+ if ( FT_CURVE_TAG( outline.tags[prev] ) == FT_CURVE_TAG_ON )
+ {
+ best_on_point_first = prev;
+ if ( best_on_point_last < 0 )
+ best_on_point_last = prev;
+ }
} while ( prev != best_point );
do
{
- if ( next < best_last )
+ if ( next < best_contour_last )
next++;
else
- next = best_first;
+ next = best_contour_first;
- dist = points[next].y - best_y;
- if ( dist < -5 || dist > 5 )
- break;
+ dist = FT_ABS( points[next].y - best_y );
+ if ( dist > 5 )
+ if ( FT_ABS( points[next].x - best_x ) <= 20 * dist )
+ break;
+
+ best_segment_last = next;
+
+ if ( FT_CURVE_TAG( outline.tags[next] ) == FT_CURVE_TAG_ON )
+ {
+ best_on_point_last = next;
+ if ( best_on_point_first < 0 )
+ best_on_point_first = next;
+ }
} while ( next != best_point );
- /* now set the `round' flag depending on the segment's kind */
- round = FT_BOOL(
- FT_CURVE_TAG( glyph->outline.tags[prev] ) != FT_CURVE_TAG_ON ||
- FT_CURVE_TAG( glyph->outline.tags[next] ) != FT_CURVE_TAG_ON );
+ if ( AF_LATIN_IS_LONG_BLUE( bs ) )
+ {
+ /* If this flag is set, we have an additional constraint to */
+ /* get the blue zone distance: Find a segment of the topmost */
+ /* (or bottommost) contour that is longer than a heuristic */
+ /* threshold. This ensures that small bumps in the outline */
+ /* are ignored (for example, the `vertical serifs' found in */
+ /* many Hebrew glyph designs). */
+
+ /* If this segment is long enough, we are done. Otherwise, */
+ /* search the segment next to the extremum that is long */
+ /* enough, has the same direction, and a not too large */
+ /* vertical distance from the extremum. Note that the */
+ /* algorithm doesn't check whether the found segment is */
+ /* actually the one (vertically) nearest to the extremum. */
+
+ /* heuristic threshold value */
+ FT_Pos length_threshold = metrics->units_per_em / 25;
+
+
+ dist = FT_ABS( points[best_segment_last].x -
+ points[best_segment_first].x );
+
+ if ( dist < length_threshold &&
+ best_segment_last - best_segment_first + 2 <=
+ best_contour_last - best_contour_first )
+ {
+ /* heuristic threshold value */
+ FT_Pos height_threshold = metrics->units_per_em / 4;
+
+ FT_Int first;
+ FT_Int last;
+ FT_Bool hit;
+
+ /* we intentionally declare these two variables */
+ /* outside of the loop since various compilers emit */
+ /* incorrect warning messages otherwise, talking about */
+ /* `possibly uninitialized variables' */
+ FT_Int p_first = 0; /* make compiler happy */
+ FT_Int p_last = 0;
+
+ FT_Bool left2right;
+
+
+ /* compute direction */
+ prev = best_point;
+
+ do
+ {
+ if ( prev > best_contour_first )
+ prev--;
+ else
+ prev = best_contour_last;
+
+ if ( points[prev].x != best_x )
+ break;
+
+ } while ( prev != best_point );
+
+ /* skip glyph for the degenerate case */
+ if ( prev == best_point )
+ continue;
+
+ left2right = FT_BOOL( points[prev].x < points[best_point].x );
+
+ first = best_segment_last;
+ last = first;
+ hit = 0;
+
+ do
+ {
+ FT_Bool l2r;
+ FT_Pos d;
+
+
+ if ( !hit )
+ {
+ /* no hit; adjust first point */
+ first = last;
+
+ /* also adjust first and last on point */
+ if ( FT_CURVE_TAG( outline.tags[first] ) ==
+ FT_CURVE_TAG_ON )
+ {
+ p_first = first;
+ p_last = first;
+ }
+ else
+ {
+ p_first = -1;
+ p_last = -1;
+ }
+
+ hit = 1;
+ }
+
+ if ( last < best_contour_last )
+ last++;
+ else
+ last = best_contour_first;
+
+ if ( FT_ABS( best_y - points[first].y ) > height_threshold )
+ {
+ /* vertical distance too large */
+ hit = 0;
+ continue;
+ }
+
+ /* same test as above */
+ dist = FT_ABS( points[last].y - points[first].y );
+ if ( dist > 5 )
+ if ( FT_ABS( points[last].x - points[first].x ) <=
+ 20 * dist )
+ {
+ hit = 0;
+ continue;
+ }
+
+ if ( FT_CURVE_TAG( outline.tags[last] ) == FT_CURVE_TAG_ON )
+ {
+ p_last = last;
+ if ( p_first < 0 )
+ p_first = last;
+ }
+
+ l2r = FT_BOOL( points[first].x < points[last].x );
+ d = FT_ABS( points[last].x - points[first].x );
+
+ if ( l2r == left2right &&
+ d >= length_threshold )
+ {
+ /* all constraints are met; update segment after finding */
+ /* its end */
+ do
+ {
+ if ( last < best_contour_last )
+ last++;
+ else
+ last = best_contour_first;
+
+ d = FT_ABS( points[last].y - points[first].y );
+ if ( d > 5 )
+ if ( FT_ABS( points[next].x - points[first].x ) <=
+ 20 * dist )
+ {
+ if ( last > best_contour_first )
+ last--;
+ else
+ last = best_contour_last;
+ break;
+ }
+
+ p_last = last;
+
+ if ( FT_CURVE_TAG( outline.tags[last] ) ==
+ FT_CURVE_TAG_ON )
+ {
+ p_last = last;
+ if ( p_first < 0 )
+ p_first = last;
+ }
+
+ } while ( last != best_segment_first );
+
+ best_y = points[first].y;
+
+ best_segment_first = first;
+ best_segment_last = last;
+
+ best_on_point_first = p_first;
+ best_on_point_last = p_last;
+
+ break;
+ }
+
+ } while ( last != best_segment_first );
+ }
+ }
+
+ /* for computing blue zones, we add the y offset as returned */
+ /* by the currently used OpenType feature -- for example, */
+ /* superscript glyphs might be identical to subscript glyphs */
+ /* with a vertical shift */
+ best_y += y_offset;
+
+ FT_TRACE5(( " U+%04lX: best_y = %5ld", ch, best_y ));
+
+ /* now set the `round' flag depending on the segment's kind: */
+ /* */
+ /* - if the horizontal distance between the first and last */
+ /* `on' point is larger than upem/8 (value 8 is heuristic) */
+ /* we have a flat segment */
+ /* - if either the first or the last point of the segment is */
+ /* an `off' point, the segment is round, otherwise it is */
+ /* flat */
+ if ( best_on_point_first >= 0 &&
+ best_on_point_last >= 0 &&
+ (FT_UInt)( FT_ABS( points[best_on_point_last].x -
+ points[best_on_point_first].x ) ) >
+ metrics->units_per_em / 8 )
+ round = 0;
+ else
+ round = FT_BOOL(
+ FT_CURVE_TAG( outline.tags[best_segment_first] ) !=
+ FT_CURVE_TAG_ON ||
+ FT_CURVE_TAG( outline.tags[best_segment_last] ) !=
+ FT_CURVE_TAG_ON );
- FT_TRACE5(( "%c ", round ? 'r' : 'f' ));
+ if ( round && AF_LATIN_IS_NEUTRAL_BLUE( bs ) )
+ {
+ /* only use flat segments for a neutral blue zone */
+ FT_TRACE5(( " (round, skipped)\n" ));
+ continue;
+ }
+
+ FT_TRACE5(( " (%s)\n", round ? "round" : "flat" ));
}
if ( round )
flats[num_flats++] = best_y;
}
- FT_TRACE5(( "\n" ));
-
if ( num_flats == 0 && num_rounds == 0 )
{
/*
* we couldn't find a single glyph to compute this blue zone,
* we will simply ignore it then
*/
- FT_TRACE5(( "empty\n" ));
+ FT_TRACE5(( " empty\n" ));
continue;
}
}
else
{
- *blue_ref = flats[num_flats / 2];
+ *blue_ref = flats [num_flats / 2];
*blue_shoot = rounds[num_rounds / 2];
}
FT_Bool over_ref = FT_BOOL( shoot > ref );
- if ( AF_LATIN_IS_TOP_BLUE( bb ) ^ over_ref )
+ if ( AF_LATIN_IS_TOP_BLUE( bs ) ^ over_ref )
+ {
*blue_ref =
*blue_shoot = ( shoot + ref ) / 2;
+
+ FT_TRACE5(( " [overshoot smaller than reference,"
+ " taking mean value]\n" ));
+ }
}
blue->flags = 0;
- if ( AF_LATIN_IS_TOP_BLUE( bb ) )
+ if ( AF_LATIN_IS_TOP_BLUE( bs ) )
blue->flags |= AF_LATIN_BLUE_TOP;
+ if ( AF_LATIN_IS_NEUTRAL_BLUE( bs ) )
+ blue->flags |= AF_LATIN_BLUE_NEUTRAL;
/*
* The following flag is used later to adjust the y and x scales
* in order to optimize the pixel grid alignment of the top of small
* letters.
*/
- if ( bb == AF_LATIN_BLUE_SMALL_TOP )
+ if ( AF_LATIN_IS_X_HEIGHT_BLUE( bs ) )
blue->flags |= AF_LATIN_BLUE_ADJUSTMENT;
- FT_TRACE5(( "-- ref = %ld, shoot = %ld\n", *blue_ref, *blue_shoot ));
+ FT_TRACE5(( " -> reference = %ld\n"
+ " overshoot = %ld\n",
+ *blue_ref, *blue_shoot ));
}
FT_TRACE5(( "\n" ));
/* digit `0' is 0x30 in all supported charmaps */
for ( i = 0x30; i <= 0x39; i++ )
{
- FT_UInt glyph_index;
+ FT_ULong glyph_index;
+ FT_Long y_offset;
- glyph_index = FT_Get_Char_Index( face, i );
+ af_get_char_index( &metrics->root, i, &glyph_index, &y_offset );
if ( glyph_index == 0 )
continue;
af_latin_metrics_init( AF_LatinMetrics metrics,
FT_Face face )
{
- FT_Error error = AF_Err_Ok;
FT_CharMap oldmap = face->charmap;
- FT_UInt ee;
-
- static const FT_Encoding latin_encodings[] =
- {
- FT_ENCODING_UNICODE,
- FT_ENCODING_APPLE_ROMAN,
- FT_ENCODING_ADOBE_STANDARD,
- FT_ENCODING_ADOBE_LATIN_1,
-
- FT_ENCODING_NONE /* end of list */
- };
metrics->units_per_em = face->units_per_EM;
- /* do we have a latin charmap in there? */
- for ( ee = 0; latin_encodings[ee] != FT_ENCODING_NONE; ee++ )
- {
- error = FT_Select_Charmap( face, latin_encodings[ee] );
- if ( !error )
- break;
- }
-
- if ( !error )
+ if ( !FT_Select_Charmap( face, FT_ENCODING_UNICODE ) )
{
- /* For now, compute the standard width and height from the `o'. */
- af_latin_metrics_init_widths( metrics, face, 'o' );
+ af_latin_metrics_init_widths( metrics, face );
af_latin_metrics_init_blues( metrics, face );
af_latin_metrics_check_digits( metrics, face );
}
FT_Set_Charmap( face, oldmap );
- return AF_Err_Ok;
+ return FT_Err_Ok;
}
if ( blue )
{
- FT_Pos scaled = FT_MulFix( blue->shoot.org, scaler->y_scale );
- FT_Pos fitted = ( scaled + 40 ) & ~63;
+ FT_Pos scaled;
+ FT_Pos threshold;
+ FT_Pos fitted;
+ FT_UInt limit;
+ FT_UInt ppem;
+
+
+ scaled = FT_MulFix( blue->shoot.org, scaler->y_scale );
+ ppem = metrics->root.scaler.face->size->metrics.x_ppem;
+ limit = metrics->root.globals->increase_x_height;
+ threshold = 40;
+ /* if the `increase-x-height' property is active, */
+ /* we round up much more often */
+ if ( limit &&
+ ppem <= limit &&
+ ppem >= AF_PROP_INCREASE_X_HEIGHT_MIN )
+ threshold = 52;
+
+ fitted = ( scaled + threshold ) & ~63;
if ( scaled != fitted )
{
else
#endif
if ( dim == AF_DIMENSION_VERT )
+ {
scale = FT_MulDiv( scale, fitted, scaled );
+
+ FT_TRACE5((
+ "af_latin_metrics_scale_dim:"
+ " x height alignment (style `%s'):\n"
+ " "
+ " vertical scaling changed from %.4f to %.4f (by %d%%)\n"
+ "\n",
+ af_style_names[metrics->root.style_class->style],
+ axis->org_scale / 65536.0,
+ scale / 65536.0,
+ ( fitted - scaled ) * 100 / scaled ));
+ }
}
}
}
metrics->root.scaler.y_delta = delta;
}
+ FT_TRACE5(( "%s widths (style `%s')\n",
+ dim == AF_DIMENSION_HORZ ? "horizontal" : "vertical",
+ af_style_names[metrics->root.style_class->style] ));
+
/* scale the widths */
for ( nn = 0; nn < axis->width_count; nn++ )
{
width->cur = FT_MulFix( width->org, scale );
width->fit = width->cur;
+
+ FT_TRACE5(( " %d scaled to %.2f\n",
+ width->org,
+ width->cur / 64.0 ));
}
+ FT_TRACE5(( "\n" ));
+
/* an extra-light axis corresponds to a standard width that is */
/* smaller than 5/8 pixels */
axis->extra_light =
(FT_Bool)( FT_MulFix( axis->standard_width, scale ) < 32 + 8 );
+#ifdef FT_DEBUG_LEVEL_TRACE
+ if ( axis->extra_light )
+ FT_TRACE5(( "`%s' style is extra light (at current resolution)\n"
+ "\n",
+ af_style_names[metrics->root.style_class->style] ));
+#endif
+
if ( dim == AF_DIMENSION_VERT )
{
+ FT_TRACE5(( "blue zones (style `%s')\n",
+ af_style_names[metrics->root.style_class->style] ));
+
/* scale the blue zones */
for ( nn = 0; nn < axis->blue_count; nn++ )
{
if ( delta2 < 32 )
delta2 = 0;
- else if ( delta < 48 )
+ else if ( delta2 < 48 )
delta2 = 32;
else
delta2 = 64;
#endif
blue->flags |= AF_LATIN_BLUE_ACTIVE;
+
+ FT_TRACE5(( " reference %d: %d scaled to %.2f%s\n"
+ " overshoot %d: %d scaled to %.2f%s\n",
+ nn,
+ blue->ref.org,
+ blue->ref.fit / 64.0,
+ blue->flags & AF_LATIN_BLUE_ACTIVE ? ""
+ : " (inactive)",
+ nn,
+ blue->shoot.org,
+ blue->shoot.fit / 64.0,
+ blue->flags & AF_LATIN_BLUE_ACTIVE ? ""
+ : " (inactive)" ));
}
}
}
{
metrics->root.scaler.render_mode = scaler->render_mode;
metrics->root.scaler.face = scaler->face;
+ metrics->root.scaler.flags = scaler->flags;
af_latin_metrics_scale_dim( metrics, scaler, AF_DIMENSION_HORZ );
af_latin_metrics_scale_dim( metrics, scaler, AF_DIMENSION_VERT );
{
AF_AxisHints axis = &hints->axis[dim];
FT_Memory memory = hints->memory;
- FT_Error error = AF_Err_Ok;
+ FT_Error error = FT_Err_Ok;
AF_Segment segment = NULL;
AF_SegmentRec seg0;
AF_Point* contour = hints->contours;
on_edge = 0;
segment = NULL;
- /* fallthrough */
+ /* fall through */
}
}
/* this is the start of a new segment! */
segment_dir = (AF_Direction)point->out_dir;
- /* clear all segment fields */
error = af_axis_hints_new_segment( axis, memory, &segment );
if ( error )
goto Exit;
- segment[0] = seg0;
+ /* clear all segment fields */
+ segment[0] = seg0;
+
segment->dir = (FT_Char)segment_dir;
min_pos = max_pos = point->u;
segment->first = point;
segment->last = point;
- on_edge = 1;
+
+ on_edge = 1;
}
point = point->next;
} /* contours */
- /* now slightly increase the height of segments when this makes */
- /* sense -- this is used to better detect and ignore serifs */
+ /* now slightly increase the height of segments if this makes */
+ /* sense -- this is used to better detect and ignore serifs */
{
AF_Segment segments = axis->segments;
AF_Segment segments_end = segments + axis->num_segments;
FT_Pos last_v = last->v;
- if ( first == last )
- continue;
-
if ( first_v < last_v )
{
AF_Point p;
}
- /* Link segments to form stems and serifs. */
+ /* Link segments to form stems and serifs. If `width_count' and */
+ /* `widths' are non-zero, use them to fine-tune the scoring function. */
FT_LOCAL_DEF( void )
af_latin_hints_link_segments( AF_GlyphHints hints,
+ FT_UInt width_count,
+ AF_WidthRec* widths,
AF_Dimension dim )
{
AF_AxisHints axis = &hints->axis[dim];
AF_Segment segments = axis->segments;
AF_Segment segment_limit = segments + axis->num_segments;
- FT_Pos len_threshold, len_score;
+ FT_Pos len_threshold, len_score, dist_score, max_width;
AF_Segment seg1, seg2;
+ if ( width_count )
+ max_width = widths[width_count - 1].org;
+ else
+ max_width = 0;
+
+ /* a heuristic value to set up a minimum value for overlapping */
len_threshold = AF_LATIN_CONSTANT( hints->metrics, 8 );
if ( len_threshold == 0 )
len_threshold = 1;
+ /* a heuristic value to weight lengths */
len_score = AF_LATIN_CONSTANT( hints->metrics, 6000 );
+ /* a heuristic value to weight distances (no call to */
+ /* AF_LATIN_CONSTANT needed, since we work on multiples */
+ /* of the stem width) */
+ dist_score = 3000;
+
/* now compare each segment to the others */
for ( seg1 = segments; seg1 < segment_limit; seg1++ )
{
- /* the fake segments are introduced to hint the metrics -- */
- /* we must never link them to anything */
- if ( seg1->dir != axis->major_dir || seg1->first == seg1->last )
+ if ( seg1->dir != axis->major_dir )
continue;
/* search for stems having opposite directions, */
if ( seg1->dir + seg2->dir == 0 && pos2 > pos1 )
{
/* compute distance between the two segments */
- FT_Pos dist = pos2 - pos1;
- FT_Pos min = seg1->min_coord;
- FT_Pos max = seg1->max_coord;
- FT_Pos len, score;
+ FT_Pos min = seg1->min_coord;
+ FT_Pos max = seg1->max_coord;
+ FT_Pos len;
if ( min < seg2->min_coord )
max = seg2->max_coord;
/* compute maximum coordinate difference of the two segments */
+ /* (this is, how much they overlap) */
len = max - min;
if ( len >= len_threshold )
{
- /* small coordinate differences cause a higher score, and */
- /* segments with a greater distance cause a higher score also */
- score = dist + len_score / len;
+ /*
+ * The score is the sum of two demerits indicating the
+ * `badness' of a fit, measured along the segments' main axis
+ * and orthogonal to it, respectively.
+ *
+ * o The less overlapping along the main axis, the worse it
+ * is, causing a larger demerit.
+ *
+ * o The nearer the orthogonal distance to a stem width, the
+ * better it is, causing a smaller demerit. For simplicity,
+ * however, we only increase the demerit for values that
+ * exceed the largest stem width.
+ */
+
+ FT_Pos dist = pos2 - pos1;
+
+ FT_Pos dist_demerit, score;
+
+
+ if ( max_width )
+ {
+ /* distance demerits are based on multiples of `max_width'; */
+ /* we scale by 1024 for getting more precision */
+ FT_Pos delta = ( dist << 10 ) / max_width - ( 1 << 10 );
+
+
+ if ( delta > 10000 )
+ dist_demerit = 32000;
+ else if ( delta > 0 )
+ dist_demerit = delta * delta / dist_score;
+ else
+ dist_demerit = 0;
+ }
+ else
+ dist_demerit = dist; /* default if no widths available */
+
+ score = dist_demerit + len_score / len;
/* and we search for the smallest score */
- /* of the sum of the two values */
if ( score < seg1->score )
{
seg1->score = score;
AF_Dimension dim )
{
AF_AxisHints axis = &hints->axis[dim];
- FT_Error error = AF_Err_Ok;
+ FT_Error error = FT_Err_Ok;
FT_Memory memory = hints->memory;
AF_LatinAxis laxis = &((AF_LatinMetrics)hints->metrics)->axis[dim];
}
- /*********************************************************************/
- /* */
- /* Good, we will now compute each edge's properties according to */
- /* the segments found on its position. Basically, these are */
- /* */
- /* - the edge's main direction */
- /* - stem edge, serif edge or both (which defaults to stem then) */
- /* - rounded edge, straight or both (which defaults to straight) */
- /* - link for edge */
- /* */
- /*********************************************************************/
+ /******************************************************************/
+ /* */
+ /* Good, we now compute each edge's properties according to the */
+ /* segments found on its position. Basically, these are */
+ /* */
+ /* - the edge's main direction */
+ /* - stem edge, serif edge or both (which defaults to stem then) */
+ /* - rounded edge, straight or both (which defaults to straight) */
+ /* - link for edge */
+ /* */
+ /******************************************************************/
/* first of all, set the `edge' field in each segment -- this is */
/* required in order to compute edge links */
FT_LOCAL_DEF( FT_Error )
af_latin_hints_detect_features( AF_GlyphHints hints,
+ FT_UInt width_count,
+ AF_WidthRec* widths,
AF_Dimension dim )
{
FT_Error error;
error = af_latin_hints_compute_segments( hints, dim );
if ( !error )
{
- af_latin_hints_link_segments( hints, dim );
+ af_latin_hints_link_segments( hints, width_count, widths, dim );
error = af_latin_hints_compute_edges( hints, dim );
}
/* for each horizontal edge search the blue zone which is closest */
for ( ; edge < edge_limit; edge++ )
{
- FT_Int bb;
- AF_Width best_blue = NULL;
- FT_Pos best_dist; /* initial threshold */
+ FT_UInt bb;
+ AF_Width best_blue = NULL;
+ FT_Bool best_blue_is_neutral = 0;
+ FT_Pos best_dist; /* initial threshold */
/* compute the initial threshold as a fraction of the EM size */
if ( best_dist > 64 / 2 )
best_dist = 64 / 2;
- for ( bb = 0; bb < AF_LATIN_BLUE_MAX; bb++ )
+ for ( bb = 0; bb < latin->blue_count; bb++ )
{
AF_LatinBlue blue = latin->blues + bb;
- FT_Bool is_top_blue, is_major_dir;
+ FT_Bool is_top_blue, is_neutral_blue, is_major_dir;
/* skip inactive blue zones (i.e., those that are too large) */
if ( !( blue->flags & AF_LATIN_BLUE_ACTIVE ) )
continue;
- /* if it is a top zone, check for right edges -- if it is a bottom */
- /* zone, check for left edges */
- /* */
- /* of course, that's for TrueType */
- is_top_blue = (FT_Byte)( ( blue->flags & AF_LATIN_BLUE_TOP ) != 0 );
- is_major_dir = FT_BOOL( edge->dir == axis->major_dir );
-
- /* if it is a top zone, the edge must be against the major */
- /* direction; if it is a bottom zone, it must be in the major */
- /* direction */
- if ( is_top_blue ^ is_major_dir )
+ /* if it is a top zone, check for right edges (against the major */
+ /* direction); if it is a bottom zone, check for left edges (in */
+ /* the major direction) -- this assumes the TrueType convention */
+ /* for the orientation of contours */
+ is_top_blue =
+ (FT_Byte)( ( blue->flags & AF_LATIN_BLUE_TOP ) != 0 );
+ is_neutral_blue =
+ (FT_Byte)( ( blue->flags & AF_LATIN_BLUE_NEUTRAL ) != 0);
+ is_major_dir =
+ FT_BOOL( edge->dir == axis->major_dir );
+
+ /* neutral blue zones are handled for both directions */
+ if ( is_top_blue ^ is_major_dir || is_neutral_blue )
{
FT_Pos dist;
dist = FT_MulFix( dist, scale );
if ( dist < best_dist )
{
- best_dist = dist;
- best_blue = &blue->ref;
+ best_dist = dist;
+ best_blue = &blue->ref;
+ best_blue_is_neutral = is_neutral_blue;
}
/* now compare it to the overshoot position and check whether */
/* the edge is rounded, and whether the edge is over the */
/* reference position of a top zone, or under the reference */
- /* position of a bottom zone */
- if ( edge->flags & AF_EDGE_ROUND && dist != 0 )
+ /* position of a bottom zone (provided we don't have a */
+ /* neutral blue zone) */
+ if ( edge->flags & AF_EDGE_ROUND &&
+ dist != 0 &&
+ !is_neutral_blue )
{
FT_Bool is_under_ref = FT_BOOL( edge->fpos < blue->ref.org );
dist = FT_MulFix( dist, scale );
if ( dist < best_dist )
{
- best_dist = dist;
- best_blue = &blue->shoot;
+ best_dist = dist;
+ best_blue = &blue->shoot;
+ best_blue_is_neutral = is_neutral_blue;
}
}
}
}
if ( best_blue )
+ {
edge->blue_edge = best_blue;
+ if ( best_blue_is_neutral )
+ edge->flags |= AF_EDGE_NEUTRAL;
+ }
}
}
FT_Face face = metrics->root.scaler.face;
- af_glyph_hints_rescale( hints, (AF_ScriptMetrics)metrics );
+ af_glyph_hints_rescale( hints, (AF_StyleMetrics)metrics );
/*
* correct x_scale and y_scale if needed, since they may have
#if 0 /* #ifdef AF_CONFIG_OPTION_USE_WARPER */
if ( mode == FT_RENDER_MODE_LCD || mode == FT_RENDER_MODE_LCD_V )
- {
metrics->root.scaler.render_mode = mode = FT_RENDER_MODE_NORMAL;
- }
#endif
scaler_flags = hints->scaler_flags;
hints->scaler_flags = scaler_flags;
hints->other_flags = other_flags;
- return AF_Err_Ok;
+ return FT_Err_Ok;
}
AF_Edge_Flags base_flags,
AF_Edge_Flags stem_flags )
{
- AF_LatinMetrics metrics = (AF_LatinMetrics) hints->metrics;
- AF_LatinAxis axis = & metrics->axis[dim];
+ AF_LatinMetrics metrics = (AF_LatinMetrics)hints->metrics;
+ AF_LatinAxis axis = &metrics->axis[dim];
FT_Pos dist = width;
FT_Int sign = 0;
FT_Int vertical = ( dim == AF_DIMENSION_VERT );
if ( delta < 0 )
delta = -delta;
- if (delta >= 16)
+ if ( delta >= 16 )
{
dist = org_dist;
if ( dist < 48 )
stem_edge->pos = base_edge->pos + fitted_width;
- FT_TRACE5(( " LINK: edge %d (opos=%.2f) linked to (%.2f),"
+ FT_TRACE5(( " LINK: edge %d (opos=%.2f) linked to %.2f,"
" dist was %.2f, now %.2f\n",
- stem_edge-hints->axis[dim].edges, stem_edge->opos / 64.0,
+ stem_edge - hints->axis[dim].edges, stem_edge->opos / 64.0,
stem_edge->pos / 64.0, dist / 64.0, fitted_width / 64.0 ));
}
AF_Edge anchor = NULL;
FT_Int has_serifs = 0;
+#ifdef FT_DEBUG_LEVEL_TRACE
+ FT_UInt num_actions = 0;
+#endif
+
- FT_TRACE5(("%s edge hinting\n", dim == AF_DIMENSION_VERT ? "horizontal"
- : "vertical"));
+ FT_TRACE5(( "latin %s edge hinting (style `%s')\n",
+ dim == AF_DIMENSION_VERT ? "horizontal" : "vertical",
+ af_style_names[hints->metrics->style_class->style] ));
/* we begin by aligning all stems relative to the blue zone */
/* if needed -- that's only for horizontal edges */
if ( edge->flags & AF_EDGE_DONE )
continue;
- blue = edge->blue_edge;
edge1 = NULL;
edge2 = edge->link;
+ /*
+ * If a stem contains both a neutral and a non-neutral blue zone,
+ * skip the neutral one. Otherwise, outlines with different
+ * directions might be incorrectly aligned at the same vertical
+ * position.
+ *
+ * If we have two neutral blue zones, skip one of them.
+ *
+ */
+ if ( edge->blue_edge && edge2 && edge2->blue_edge )
+ {
+ FT_Byte neutral = edge->flags & AF_EDGE_NEUTRAL;
+ FT_Byte neutral2 = edge2->flags & AF_EDGE_NEUTRAL;
+
+
+ if ( ( neutral && neutral2 ) || neutral2 )
+ {
+ edge2->blue_edge = NULL;
+ edge2->flags &= ~AF_EDGE_NEUTRAL;
+ }
+ else if ( neutral )
+ {
+ edge->blue_edge = NULL;
+ edge->flags &= ~AF_EDGE_NEUTRAL;
+ }
+ }
+
+ blue = edge->blue_edge;
if ( blue )
edge1 = edge;
- /* flip edges if the other stem is aligned to a blue zone */
+ /* flip edges if the other edge is aligned to a blue zone */
else if ( edge2 && edge2->blue_edge )
{
blue = edge2->blue_edge;
if ( !edge1 )
continue;
- FT_TRACE5(( " BLUE: edge %d (opos=%.2f) snapped to (%.2f),"
- " was (%.2f)\n",
- edge1 - edges, edge1->opos / 64.0, blue->fit / 64.0,
- edge1->pos / 64.0 ));
+#ifdef FT_DEBUG_LEVEL_TRACE
+ if ( !anchor )
+ FT_TRACE5(( " BLUE_ANCHOR: edge %d (opos=%.2f) snapped to %.2f,"
+ " was %.2f (anchor=edge %d)\n",
+ edge1 - edges, edge1->opos / 64.0, blue->fit / 64.0,
+ edge1->pos / 64.0, edge - edges ));
+ else
+ FT_TRACE5(( " BLUE: edge %d (opos=%.2f) snapped to %.2f,"
+ " was %.2f\n",
+ edge1 - edges, edge1->opos / 64.0, blue->fit / 64.0,
+ edge1->pos / 64.0 ));
+
+ num_actions++;
+#endif
edge1->pos = blue->fit;
edge1->flags |= AF_EDGE_DONE;
{
af_latin_align_linked_edge( hints, dim, edge1, edge2 );
edge2->flags |= AF_EDGE_DONE;
+
+#ifdef FT_DEBUG_LEVEL_TRACE
+ num_actions++;
+#endif
}
if ( !anchor )
/* this should not happen, but it's better to be safe */
if ( edge2->blue_edge )
{
- FT_TRACE5(( " ASSERTION FAILED for edge %d\n", edge2-edges ));
+ FT_TRACE5(( " ASSERTION FAILED for edge %d\n", edge2 - edges ));
af_latin_align_linked_edge( hints, dim, edge2, edge );
edge->flags |= AF_EDGE_DONE;
+
+#ifdef FT_DEBUG_LEVEL_TRACE
+ num_actions++;
+#endif
continue;
}
else
edge->pos = FT_PIX_ROUND( edge->opos );
+ anchor = edge;
+ edge->flags |= AF_EDGE_DONE;
+
FT_TRACE5(( " ANCHOR: edge %d (opos=%.2f) and %d (opos=%.2f)"
- " snapped to (%.2f) (%.2f)\n",
+ " snapped to %.2f and %.2f\n",
edge - edges, edge->opos / 64.0,
edge2 - edges, edge2->opos / 64.0,
edge->pos / 64.0, edge2->pos / 64.0 ));
- anchor = edge;
-
- edge->flags |= AF_EDGE_DONE;
af_latin_align_linked_edge( hints, dim, edge, edge2 );
+
+#ifdef FT_DEBUG_LEVEL_TRACE
+ num_actions += 2;
+#endif
}
else
{
cur_pos1 = FT_PIX_ROUND( org_center );
- if (cur_len <= 64 )
+ if ( cur_len <= 64 )
{
u_off = 32;
d_off = 32;
edge->pos = cur_pos1 - cur_len / 2;
edge2->pos = cur_pos1 + cur_len / 2;
- FT_TRACE5(( " STEM: %d (opos=%.2f) to %d (opos=%.2f)"
- " snapped to (%.2f) and (%.2f)\n",
+ FT_TRACE5(( " STEM: edge %d (opos=%.2f) linked to %d (opos=%.2f)"
+ " snapped to %.2f and %.2f\n",
edge - edges, edge->opos / 64.0,
edge2 - edges, edge2->opos / 64.0,
edge->pos / 64.0, edge2->pos / 64.0 ));
}
+
else
{
org_pos = anchor->pos + ( edge->opos - anchor->opos );
edge->pos = ( delta1 < delta2 ) ? cur_pos1 : cur_pos2;
edge2->pos = edge->pos + cur_len;
- FT_TRACE5(( " STEM: %d (opos=%.2f) to %d (opos=%.2f)"
- " snapped to (%.2f) and (%.2f)\n",
+ FT_TRACE5(( " STEM: edge %d (opos=%.2f) linked to %d (opos=%.2f)"
+ " snapped to %.2f and %.2f\n",
edge - edges, edge->opos / 64.0,
edge2 - edges, edge2->opos / 64.0,
edge->pos / 64.0, edge2->pos / 64.0 ));
}
+#ifdef FT_DEBUG_LEVEL_TRACE
+ num_actions++;
+#endif
+
edge->flags |= AF_EDGE_DONE;
edge2->flags |= AF_EDGE_DONE;
if ( edge > edges && edge->pos < edge[-1].pos )
{
- FT_TRACE5(( " BOUND: %d (pos=%.2f) to (%.2f)\n",
+#ifdef FT_DEBUG_LEVEL_TRACE
+ FT_TRACE5(( " BOUND: edge %d (pos=%.2f) moved to %.2f\n",
edge - edges, edge->pos / 64.0, edge[-1].pos / 64.0 ));
+
+ num_actions++;
+#endif
+
edge->pos = edge[-1].pos;
}
}
{
af_latin_align_serif_edge( hints, edge->serif, edge );
FT_TRACE5(( " SERIF: edge %d (opos=%.2f) serif to %d (opos=%.2f)"
- " aligned to (%.2f)\n",
+ " aligned to %.2f\n",
edge - edges, edge->opos / 64.0,
edge->serif - edges, edge->serif->opos / 64.0,
edge->pos / 64.0 ));
edge->pos = FT_PIX_ROUND( edge->opos );
anchor = edge;
FT_TRACE5(( " SERIF_ANCHOR: edge %d (opos=%.2f)"
- " snapped to (%.2f)\n",
+ " snapped to %.2f\n",
edge-edges, edge->opos / 64.0, edge->pos / 64.0 ));
}
else
after->pos - before->pos,
after->opos - before->opos );
- FT_TRACE5(( " SERIF_LINK1: edge %d (opos=%.2f) snapped to (%.2f)"
+ FT_TRACE5(( " SERIF_LINK1: edge %d (opos=%.2f) snapped to %.2f"
" from %d (opos=%.2f)\n",
edge - edges, edge->opos / 64.0,
edge->pos / 64.0,
{
edge->pos = anchor->pos +
( ( edge->opos - anchor->opos + 16 ) & ~31 );
-
FT_TRACE5(( " SERIF_LINK2: edge %d (opos=%.2f)"
- " snapped to (%.2f)\n",
+ " snapped to %.2f\n",
edge - edges, edge->opos / 64.0, edge->pos / 64.0 ));
}
}
+#ifdef FT_DEBUG_LEVEL_TRACE
+ num_actions++;
+#endif
edge->flags |= AF_EDGE_DONE;
if ( edge > edges && edge->pos < edge[-1].pos )
+ {
+#ifdef FT_DEBUG_LEVEL_TRACE
+ FT_TRACE5(( " BOUND: edge %d (pos=%.2f) moved to %.2f\n",
+ edge - edges, edge->pos / 64.0, edge[-1].pos / 64.0 ));
+
+ num_actions++;
+#endif
edge->pos = edge[-1].pos;
+ }
if ( edge + 1 < edge_limit &&
edge[1].flags & AF_EDGE_DONE &&
edge->pos > edge[1].pos )
+ {
+#ifdef FT_DEBUG_LEVEL_TRACE
+ FT_TRACE5(( " BOUND: edge %d (pos=%.2f) moved to %.2f\n",
+ edge - edges, edge->pos / 64.0, edge[1].pos / 64.0 ));
+
+ num_actions++;
+#endif
+
edge->pos = edge[1].pos;
+ }
}
}
+#ifdef FT_DEBUG_LEVEL_TRACE
+ if ( !num_actions )
+ FT_TRACE5(( " (none)\n" ));
FT_TRACE5(( "\n" ));
+#endif
}
FT_Error error;
int dim;
+ AF_LatinAxis axis;
+
error = af_glyph_hints_reload( hints, outline );
if ( error )
if ( AF_HINTS_DO_HORIZONTAL( hints ) )
#endif
{
- error = af_latin_hints_detect_features( hints, AF_DIMENSION_HORZ );
+ axis = &metrics->axis[AF_DIMENSION_HORZ];
+ error = af_latin_hints_detect_features( hints,
+ axis->width_count,
+ axis->widths,
+ AF_DIMENSION_HORZ );
if ( error )
goto Exit;
}
if ( AF_HINTS_DO_VERTICAL( hints ) )
{
- error = af_latin_hints_detect_features( hints, AF_DIMENSION_VERT );
+ axis = &metrics->axis[AF_DIMENSION_VERT];
+ error = af_latin_hints_detect_features( hints,
+ axis->width_count,
+ axis->widths,
+ AF_DIMENSION_VERT );
if ( error )
goto Exit;
af_glyph_hints_align_weak_points( hints, (AF_Dimension)dim );
}
}
+
af_glyph_hints_save( hints, outline );
Exit:
/*************************************************************************/
- /* XXX: this should probably fine tuned to differentiate better between */
- /* scripts... */
+ AF_DEFINE_WRITING_SYSTEM_CLASS(
+ af_latin_writing_system_class,
- static const AF_Script_UniRangeRec af_latin_uniranges[] =
- {
- AF_UNIRANGE_REC( 0x0020UL, 0x007FUL ), /* Basic Latin (no control chars) */
- AF_UNIRANGE_REC( 0x00A0UL, 0x00FFUL ), /* Latin-1 Supplement (no control chars) */
- AF_UNIRANGE_REC( 0x0100UL, 0x017FUL ), /* Latin Extended-A */
- AF_UNIRANGE_REC( 0x0180UL, 0x024FUL ), /* Latin Extended-B */
- AF_UNIRANGE_REC( 0x0250UL, 0x02AFUL ), /* IPA Extensions */
- AF_UNIRANGE_REC( 0x02B0UL, 0x02FFUL ), /* Spacing Modifier Letters */
- AF_UNIRANGE_REC( 0x0300UL, 0x036FUL ), /* Combining Diacritical Marks */
- AF_UNIRANGE_REC( 0x0370UL, 0x03FFUL ), /* Greek and Coptic */
- AF_UNIRANGE_REC( 0x0400UL, 0x04FFUL ), /* Cyrillic */
- AF_UNIRANGE_REC( 0x0500UL, 0x052FUL ), /* Cyrillic Supplement */
- AF_UNIRANGE_REC( 0x1D00UL, 0x1D7FUL ), /* Phonetic Extensions */
- AF_UNIRANGE_REC( 0x1D80UL, 0x1DBFUL ), /* Phonetic Extensions Supplement */
- AF_UNIRANGE_REC( 0x1DC0UL, 0x1DFFUL ), /* Combining Diacritical Marks Supplement */
- AF_UNIRANGE_REC( 0x1E00UL, 0x1EFFUL ), /* Latin Extended Additional */
- AF_UNIRANGE_REC( 0x1F00UL, 0x1FFFUL ), /* Greek Extended */
- AF_UNIRANGE_REC( 0x2000UL, 0x206FUL ), /* General Punctuation */
- AF_UNIRANGE_REC( 0x2070UL, 0x209FUL ), /* Superscripts and Subscripts */
- AF_UNIRANGE_REC( 0x20A0UL, 0x20CFUL ), /* Currency Symbols */
- AF_UNIRANGE_REC( 0x2150UL, 0x218FUL ), /* Number Forms */
- AF_UNIRANGE_REC( 0x2460UL, 0x24FFUL ), /* Enclosed Alphanumerics */
- AF_UNIRANGE_REC( 0x2C60UL, 0x2C7FUL ), /* Latin Extended-C */
- AF_UNIRANGE_REC( 0x2DE0UL, 0x2DFFUL ), /* Cyrillic Extended-A */
- AF_UNIRANGE_REC( 0xA640UL, 0xA69FUL ), /* Cyrillic Extended-B */
- AF_UNIRANGE_REC( 0xA720UL, 0xA7FFUL ), /* Latin Extended-D */
- AF_UNIRANGE_REC( 0xFB00UL, 0xFB06UL ), /* Alphab. Present. Forms (Latin Ligs) */
- AF_UNIRANGE_REC( 0x1D400UL, 0x1D7FFUL ), /* Mathematical Alphanumeric Symbols */
- AF_UNIRANGE_REC( 0UL, 0UL )
- };
-
-
- AF_DEFINE_SCRIPT_CLASS( af_latin_script_class,
- AF_SCRIPT_LATIN,
- af_latin_uniranges,
+ AF_WRITING_SYSTEM_LATIN,
sizeof ( AF_LatinMetricsRec ),
- (AF_Script_InitMetricsFunc) af_latin_metrics_init,
- (AF_Script_ScaleMetricsFunc)af_latin_metrics_scale,
- (AF_Script_DoneMetricsFunc) NULL,
+ (AF_WritingSystem_InitMetricsFunc) af_latin_metrics_init,
+ (AF_WritingSystem_ScaleMetricsFunc)af_latin_metrics_scale,
+ (AF_WritingSystem_DoneMetricsFunc) NULL,
- (AF_Script_InitHintsFunc) af_latin_hints_init,
- (AF_Script_ApplyHintsFunc) af_latin_hints_apply
+ (AF_WritingSystem_InitHintsFunc) af_latin_hints_init,
+ (AF_WritingSystem_ApplyHintsFunc) af_latin_hints_apply
)
projects / framework / graphics / freetype.git / blobdiff