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-rw-r--r--src/3rdparty/freetype/src/autofit/aflatin.c137
1 files changed, 64 insertions, 73 deletions
diff --git a/src/3rdparty/freetype/src/autofit/aflatin.c b/src/3rdparty/freetype/src/autofit/aflatin.c
index 21ec02ebd2..bed0ccee08 100644
--- a/src/3rdparty/freetype/src/autofit/aflatin.c
+++ b/src/3rdparty/freetype/src/autofit/aflatin.c
@@ -4,7 +4,7 @@
*
* Auto-fitter hinting routines for latin writing system (body).
*
- * Copyright (C) 2003-2020 by
+ * Copyright (C) 2003-2022 by
* David Turner, Robert Wilhelm, and Werner Lemberg.
*
* This file is part of the FreeType project, and may only be used,
@@ -24,11 +24,6 @@
#include "aferrors.h"
-#ifdef AF_CONFIG_OPTION_USE_WARPER
-#include "afwarp.h"
-#endif
-
-
/**************************************************************************
*
* The macro FT_COMPONENT is used in trace mode. It is an implicit
@@ -63,11 +58,11 @@
AF_GlyphHintsRec hints[1];
- FT_TRACE5(( "\n"
- "latin standard widths computation (style `%s')\n"
- "=====================================================\n"
- "\n",
+ FT_TRACE5(( "\n" ));
+ FT_TRACE5(( "latin standard widths computation (style `%s')\n",
af_style_names[metrics->root.style_class->style] ));
+ FT_TRACE5(( "=====================================================\n" ));
+ FT_TRACE5(( "\n" ));
af_glyph_hints_init( hints, face->memory );
@@ -205,7 +200,7 @@
(AF_Dimension)dim );
seg = axhints->segments;
- limit = seg + axhints->num_segments;
+ limit = FT_OFFSET( seg, axhints->num_segments );
for ( ; seg < limit; seg++ )
{
@@ -350,9 +345,9 @@
/* we walk over the blue character strings as specified in the */
/* style's entry in the `af_blue_stringset' array */
- FT_TRACE5(( "latin blue zones computation\n"
- "============================\n"
- "\n" ));
+ FT_TRACE5(( "latin blue zones computation\n" ));
+ FT_TRACE5(( "============================\n" ));
+ FT_TRACE5(( "\n" ));
#ifdef FT_CONFIG_OPTION_USE_HARFBUZZ
shaper_buf = af_shaper_buf_create( face );
@@ -976,9 +971,8 @@
if ( AF_LATIN_IS_X_HEIGHT_BLUE( bs ) )
blue->flags |= AF_LATIN_BLUE_ADJUSTMENT;
- FT_TRACE5(( " -> reference = %ld\n"
- " overshoot = %ld\n",
- *blue_ref, *blue_shoot ));
+ FT_TRACE5(( " -> reference = %ld\n", *blue_ref ));
+ FT_TRACE5(( " overshoot = %ld\n", *blue_shoot ));
} /* end for loop */
@@ -1275,29 +1269,28 @@
if ( dist == 0 )
{
- FT_TRACE5((
- "af_latin_metrics_scale_dim:"
- " x height alignment (style `%s'):\n"
- " "
- " vertical scaling changed from %.5f to %.5f (by %ld%%)\n"
- "\n",
- af_style_names[metrics->root.style_class->style],
- scale / 65536.0,
- new_scale / 65536.0,
- ( fitted - scaled ) * 100 / scaled ));
+ FT_TRACE5(( "af_latin_metrics_scale_dim:"
+ " x height alignment (style `%s'):\n",
+ af_style_names[metrics->root.style_class->style] ));
+ FT_TRACE5(( " "
+ " vertical scaling changed"
+ " from %.5f to %.5f (by %ld%%)\n",
+ scale / 65536.0,
+ new_scale / 65536.0,
+ ( fitted - scaled ) * 100 / scaled ));
+ FT_TRACE5(( "\n" ));
scale = new_scale;
}
#ifdef FT_DEBUG_LEVEL_TRACE
else
{
- FT_TRACE5((
- "af_latin_metrics_scale_dim:"
- " x height alignment (style `%s'):\n"
- " "
- " excessive vertical scaling abandoned\n"
- "\n",
- af_style_names[metrics->root.style_class->style] ));
+ FT_TRACE5(( "af_latin_metrics_scale_dim:"
+ " x height alignment (style `%s'):\n",
+ af_style_names[metrics->root.style_class->style] ));
+ FT_TRACE5(( " "
+ " excessive vertical scaling abandoned\n" ));
+ FT_TRACE5(( "\n" ));
}
#endif
}
@@ -1346,9 +1339,11 @@
#ifdef FT_DEBUG_LEVEL_TRACE
if ( axis->extra_light )
- FT_TRACE5(( "`%s' style is extra light (at current resolution)\n"
- "\n",
+ {
+ FT_TRACE5(( "`%s' style is extra light (at current resolution)\n",
af_style_names[metrics->root.style_class->style] ));
+ FT_TRACE5(( "\n" ));
+ }
#endif
if ( dim == AF_DIMENSION_VERT )
@@ -1473,13 +1468,13 @@
AF_LatinBlue blue = &axis->blues[nn];
- FT_TRACE5(( " reference %d: %ld scaled to %.2f%s\n"
- " overshoot %d: %ld scaled to %.2f%s\n",
+ FT_TRACE5(( " reference %d: %ld scaled to %.2f%s\n",
nn,
blue->ref.org,
blue->ref.fit / 64.0,
( blue->flags & AF_LATIN_BLUE_ACTIVE ) ? ""
- : " (inactive)",
+ : " (inactive)" ));
+ FT_TRACE5(( " overshoot %d: %ld scaled to %.2f%s\n",
nn,
blue->shoot.org,
blue->shoot.fit / 64.0,
@@ -1847,6 +1842,31 @@
( FT_ABS( point->out_dir ) == major_dir ||
point == point->prev ) )
{
+ /*
+ * For efficiency, we restrict the number of segments to 1000,
+ * which is a heuristic value: it is very unlikely that a glyph
+ * with so many segments can be hinted in a sensible way.
+ * Reasons:
+ *
+ * - The glyph has really 1000 segments; this implies that it has
+ * at least 2000 outline points. Assuming 'normal' fonts that
+ * have superfluous points optimized away, viewing such a glyph
+ * only makes sense at large magnifications where hinting
+ * isn't applied anyway.
+ *
+ * - We have a broken glyph. Hinting doesn't make sense in this
+ * case either.
+ */
+ if ( axis->num_segments > 1000 )
+ {
+ FT_TRACE0(( "af_latin_hints_compute_segments:"
+ " more than 1000 segments in this glyph;\n" ));
+ FT_TRACE0(( " "
+ " hinting is suppressed\n" ));
+ axis->num_segments = 0;
+ return FT_Err_Ok;
+ }
+
/* this is the start of a new segment! */
segment_dir = (AF_Direction)point->out_dir;
@@ -1969,7 +1989,7 @@
{
AF_AxisHints axis = &hints->axis[dim];
AF_Segment segments = axis->segments;
- AF_Segment segment_limit = segments + axis->num_segments;
+ AF_Segment segment_limit = FT_OFFSET( segments, axis->num_segments );
FT_Pos len_threshold, len_score, dist_score, max_width;
AF_Segment seg1, seg2;
@@ -2089,7 +2109,7 @@
{
if ( seg2->link != seg1 )
{
- seg1->link = 0;
+ seg1->link = NULL;
seg1->serif = seg2->link;
}
}
@@ -2114,7 +2134,7 @@
FT_Bool top_to_bottom_hinting = 0;
AF_Segment segments = axis->segments;
- AF_Segment segment_limit = segments + axis->num_segments;
+ AF_Segment segment_limit = FT_OFFSET( segments, axis->num_segments );
AF_Segment seg;
#if 0
@@ -2480,7 +2500,7 @@
{
AF_AxisHints axis = &hints->axis[AF_DIMENSION_VERT];
AF_Edge edge = axis->edges;
- AF_Edge edge_limit = edge + axis->num_edges;
+ AF_Edge edge_limit = FT_OFFSET( edge, axis->num_edges );
AF_LatinAxis latin = &metrics->axis[AF_DIMENSION_VERT];
FT_Fixed scale = latin->scale;
@@ -2611,11 +2631,6 @@
/* compute flags depending on render mode, etc. */
mode = metrics->root.scaler.render_mode;
-#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;
other_flags = 0;
@@ -2653,12 +2668,6 @@
( face->style_flags & FT_STYLE_FLAG_ITALIC ) != 0 )
scaler_flags |= AF_SCALER_FLAG_NO_HORIZONTAL;
-#ifdef AF_CONFIG_OPTION_USE_WARPER
- /* get (global) warper flag */
- if ( !metrics->root.globals->module->warping )
- scaler_flags |= AF_SCALER_FLAG_NO_WARPER;
-#endif
-
hints->scaler_flags = scaler_flags;
hints->other_flags = other_flags;
@@ -2984,7 +2993,7 @@
{
AF_AxisHints axis = &hints->axis[dim];
AF_Edge edges = axis->edges;
- AF_Edge edge_limit = edges + axis->num_edges;
+ AF_Edge edge_limit = FT_OFFSET( edges, axis->num_edges );
FT_PtrDist n_edges;
AF_Edge edge;
AF_Edge anchor = NULL;
@@ -3575,24 +3584,6 @@
/* grid-fit the outline */
for ( dim = 0; dim < AF_DIMENSION_MAX; dim++ )
{
-#ifdef AF_CONFIG_OPTION_USE_WARPER
- if ( dim == AF_DIMENSION_HORZ &&
- metrics->root.scaler.render_mode == FT_RENDER_MODE_NORMAL &&
- AF_HINTS_DO_WARP( hints ) )
- {
- AF_WarperRec warper;
- FT_Fixed scale;
- FT_Pos delta;
-
-
- af_warper_compute( &warper, hints, (AF_Dimension)dim,
- &scale, &delta );
- af_glyph_hints_scale_dim( hints, (AF_Dimension)dim,
- scale, delta );
- continue;
- }
-#endif /* AF_CONFIG_OPTION_USE_WARPER */
-
if ( ( dim == AF_DIMENSION_HORZ && AF_HINTS_DO_HORIZONTAL( hints ) ) ||
( dim == AF_DIMENSION_VERT && AF_HINTS_DO_VERTICAL( hints ) ) )
{
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-20 23:44:58 +0000