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[freetype2] cleanup-autofit 06fc6ad 2/3: Remove experimental auto-hintin
|
From: |
Werner Lemberg |
|
Subject: |
[freetype2] cleanup-autofit 06fc6ad 2/3: Remove experimental auto-hinting 'warp' mode. |
|
Date: |
Mon, 12 Jul 2021 03:20:14 -0400 (EDT) |
branch: cleanup-autofit
commit 06fc6ad6b2f02c09da7e63903827e0be8061e884
Author: David Turner <david@freetype.org>
Commit: David Turner <david@freetype.org>
Remove experimental auto-hinting 'warp' mode.
This feature was always experimental, and probably nevery worked
properly. This patch completely removes it from the source code,
except for a documentation block describing it for historical
purpose.
---
ChangeLog | 14 ++
devel/ftoption.h | 18 --
include/freetype/config/ftoption.h | 18 --
include/freetype/ftdriver.h | 38 +---
src/autofit/afcjk.c | 35 ----
src/autofit/afhints.c | 29 ---
src/autofit/afhints.h | 12 --
src/autofit/afindic.c | 5 -
src/autofit/aflatin.c | 34 ----
src/autofit/afmodule.c | 46 -----
src/autofit/afmodule.h | 3 -
src/autofit/aftypes.h | 1 -
src/autofit/afwarp.c | 373 -------------------------------------
src/autofit/afwarp.h | 66 -------
src/autofit/autofit.c | 1 -
src/autofit/rules.mk | 1 -
16 files changed, 18 insertions(+), 676 deletions(-)
diff --git a/ChangeLog b/ChangeLog
index 3daf115..02e39c2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,19 @@
2021-06-02 David Turner <david@freetype.org>
+ Remove experimental auto-hinting 'warp' mode.
+
+ This feature was always experimental, and probably nevery worked
+ properly. This patch completely removes it from the source code,
+ except for a documentation block describing it for historical
+ purpose.
+
+ * devel/ftoption.h: Remove AF_CONFIG_OPTION_USE_WARPER.
+ * include/freetype/config/ftoption.h: Remove
AF_CONFIG_OPTION_USE_WARPER.
+ * include/freetype/ftdriver.h: Document 'warping' property as obsolete.
+ * src/autofit/*: Remove any warp mode related code.
+
+2021-06-02 David Turner <david@freetype.org>
+
Remove experimental "Latin2" writing system (FT_OPTION_AUTOFIT2)
This code has always been experimental and was never compiled anyway
diff --git a/devel/ftoption.h b/devel/ftoption.h
index 3cb04de..ab7bbbd 100644
--- a/devel/ftoption.h
+++ b/devel/ftoption.h
@@ -909,24 +909,6 @@ FT_BEGIN_HEADER
/**************************************************************************
*
- * Compile 'autofit' module with warp hinting. The idea of the warping
- * code is to slightly scale and shift a glyph within a single dimension so
- * that as much of its segments are aligned (more or less) on the grid. To
- * find out the optimal scaling and shifting value, various parameter
- * combinations are tried and scored.
- *
- * You can switch warping on and off with the `warping` property of the
- * auto-hinter (see file `ftdriver.h` for more information; by default it
- * is switched off).
- *
- * This experimental option is not active if the rendering mode is
- * `FT_RENDER_MODE_LIGHT`.
- */
-#define AF_CONFIG_OPTION_USE_WARPER
-
-
- /**************************************************************************
- *
* Use TrueType-like size metrics for 'light' auto-hinting.
*
* It is strongly recommended to avoid this option, which exists only to
diff --git a/include/freetype/config/ftoption.h
b/include/freetype/config/ftoption.h
index da4250b..ab5ab5f 100644
--- a/include/freetype/config/ftoption.h
+++ b/include/freetype/config/ftoption.h
@@ -911,24 +911,6 @@ FT_BEGIN_HEADER
/**************************************************************************
*
- * Compile 'autofit' module with warp hinting. The idea of the warping
- * code is to slightly scale and shift a glyph within a single dimension so
- * that as much of its segments are aligned (more or less) on the grid. To
- * find out the optimal scaling and shifting value, various parameter
- * combinations are tried and scored.
- *
- * You can switch warping on and off with the `warping` property of the
- * auto-hinter (see file `ftdriver.h` for more information; by default it
- * is switched off).
- *
- * This experimental option is not active if the rendering mode is
- * `FT_RENDER_MODE_LIGHT`.
- */
-#define AF_CONFIG_OPTION_USE_WARPER
-
-
- /**************************************************************************
- *
* Use TrueType-like size metrics for 'light' auto-hinting.
*
* It is strongly recommended to avoid this option, which exists only to
diff --git a/include/freetype/ftdriver.h b/include/freetype/ftdriver.h
index 59ae843..6b13d92 100644
--- a/include/freetype/ftdriver.h
+++ b/include/freetype/ftdriver.h
@@ -1162,11 +1162,11 @@ FT_BEGIN_HEADER
* warping
*
* @description:
- * **Experimental only**
+ * **Obsolete**
*
- * If FreeType gets compiled with option `AF_CONFIG_OPTION_USE_WARPER` to
- * activate the warp hinting code in the auto-hinter, this property
- * switches warping on and off.
+ * This property was always experimental and probably never worked
+ * correctly. It was entirely removed from the FreeType 2 sources.
+ * This entry is only here for historical reference.
*
* Warping only works in 'normal' auto-hinting mode replacing it. The
* idea of the code is to slightly scale and shift a glyph along the
@@ -1175,36 +1175,6 @@ FT_BEGIN_HEADER
* out a glyph's optimal scaling and shifting value, various parameter
* combinations are tried and scored.
*
- * By default, warping is off.
- *
- * @note:
- * This property can be used with @FT_Property_Get also.
- *
- * This property can be set via the `FREETYPE_PROPERTIES` environment
- * variable (using values 1 and 0 for 'on' and 'off', respectively).
- *
- * The warping code can also change advance widths. Have a look at the
- * `lsb_delta` and `rsb_delta` fields in the @FT_GlyphSlotRec structure
- * for details on improving inter-glyph distances while rendering.
- *
- * Since warping is a global property of the auto-hinter it is best to
- * change its value before rendering any face. Otherwise, you should
- * reload all faces that get auto-hinted in 'normal' hinting mode.
- *
- * @example:
- * This example shows how to switch on warping (omitting the error
- * handling).
- *
- * ```
- * FT_Library library;
- * FT_Bool warping = 1;
- *
- *
- * FT_Init_FreeType( &library );
- *
- * FT_Property_Set( library, "autofitter", "warping", &warping );
- * ```
- *
* @since:
* 2.6
*
diff --git a/src/autofit/afcjk.c b/src/autofit/afcjk.c
index ba15f2c..7e46b6b 100644
--- a/src/autofit/afcjk.c
+++ b/src/autofit/afcjk.c
@@ -37,11 +37,6 @@
#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
@@ -1400,11 +1395,6 @@
/* compute flags depending on render mode, etc. */
mode = metrics->root.scaler.render_mode;
-#if 0 /* 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;
@@ -1433,12 +1423,6 @@
scaler_flags |= AF_SCALER_FLAG_NO_ADVANCE;
-#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;
@@ -2321,25 +2305,6 @@
if ( ( dim == AF_DIMENSION_HORZ && AF_HINTS_DO_HORIZONTAL( hints ) ) ||
( dim == AF_DIMENSION_VERT && AF_HINTS_DO_VERTICAL( hints ) ) )
{
-
-#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 */
-
af_cjk_hint_edges( hints, (AF_Dimension)dim );
af_cjk_align_edge_points( hints, (AF_Dimension)dim );
af_glyph_hints_align_strong_points( hints, (AF_Dimension)dim );
diff --git a/src/autofit/afhints.c b/src/autofit/afhints.c
index 6e5af1e..08b5daf 100644
--- a/src/autofit/afhints.c
+++ b/src/autofit/afhints.c
@@ -1688,33 +1688,4 @@
}
-#ifdef AF_CONFIG_OPTION_USE_WARPER
-
- /* Apply (small) warp scale and warp delta for given dimension. */
-
- 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_CONFIG_OPTION_USE_WARPER */
-
/* END */
diff --git a/src/autofit/afhints.h b/src/autofit/afhints.h
index 0ce0aa3..9f36392 100644
--- a/src/autofit/afhints.h
+++ b/src/autofit/afhints.h
@@ -408,10 +408,6 @@ FT_BEGIN_HEADER
#define AF_HINTS_DO_ADVANCE( h ) \
!AF_HINTS_TEST_SCALER( h, AF_SCALER_FLAG_NO_ADVANCE )
-#define AF_HINTS_DO_WARP( h ) \
- !AF_HINTS_TEST_SCALER( h, AF_SCALER_FLAG_NO_WARPER )
-
-
FT_LOCAL( AF_Direction )
af_direction_compute( FT_Pos dx,
@@ -459,14 +455,6 @@ FT_BEGIN_HEADER
af_glyph_hints_align_weak_points( AF_GlyphHints hints,
AF_Dimension dim );
-#ifdef AF_CONFIG_OPTION_USE_WARPER
- FT_LOCAL( void )
- af_glyph_hints_scale_dim( AF_GlyphHints hints,
- AF_Dimension dim,
- FT_Fixed scale,
- FT_Pos delta );
-#endif
-
FT_LOCAL( void )
af_glyph_hints_done( AF_GlyphHints hints );
diff --git a/src/autofit/afindic.c b/src/autofit/afindic.c
index e1eeb74..064c300 100644
--- a/src/autofit/afindic.c
+++ b/src/autofit/afindic.c
@@ -27,11 +27,6 @@
#include "aferrors.h"
-#ifdef AF_CONFIG_OPTION_USE_WARPER
-#include "afwarp.h"
-#endif
-
-
static FT_Error
af_indic_metrics_init( AF_CJKMetrics metrics,
FT_Face face )
diff --git a/src/autofit/aflatin.c b/src/autofit/aflatin.c
index 8ca6ac2..b8af228 100644
--- a/src/autofit/aflatin.c
+++ b/src/autofit/aflatin.c
@@ -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
@@ -2636,11 +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;
@@ -2678,12 +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;
@@ -3600,24 +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 ) ) )
{
diff --git a/src/autofit/afmodule.c b/src/autofit/afmodule.c
index f892268..76f9b37 100644
--- a/src/autofit/afmodule.c
+++ b/src/autofit/afmodule.c
@@ -190,35 +190,6 @@
return error;
}
-#ifdef AF_CONFIG_OPTION_USE_WARPER
- else if ( !ft_strcmp( property_name, "warping" ) )
- {
-#ifdef FT_CONFIG_OPTION_ENVIRONMENT_PROPERTIES
- if ( value_is_string )
- {
- const char* s = (const char*)value;
- long w = ft_strtol( s, NULL, 10 );
-
-
- if ( w == 0 )
- module->warping = 0;
- else if ( w == 1 )
- module->warping = 1;
- else
- return FT_THROW( Invalid_Argument );
- }
- else
-#endif
- {
- FT_Bool* warping = (FT_Bool*)value;
-
-
- module->warping = *warping;
- }
-
- return error;
- }
-#endif /* AF_CONFIG_OPTION_USE_WARPER */
else if ( !ft_strcmp( property_name, "darkening-parameters" ) )
{
FT_Int* darken_params;
@@ -322,9 +293,6 @@
AF_Module module = (AF_Module)ft_module;
FT_UInt fallback_style = module->fallback_style;
FT_UInt default_script = module->default_script;
-#ifdef AF_CONFIG_OPTION_USE_WARPER
- FT_Bool warping = module->warping;
-#endif
if ( !ft_strcmp( property_name, "glyph-to-script-map" ) )
@@ -371,17 +339,6 @@
return error;
}
-#ifdef AF_CONFIG_OPTION_USE_WARPER
- else if ( !ft_strcmp( property_name, "warping" ) )
- {
- FT_Bool* val = (FT_Bool*)value;
-
-
- *val = warping;
-
- return error;
- }
-#endif /* AF_CONFIG_OPTION_USE_WARPER */
else if ( !ft_strcmp( property_name, "darkening-parameters" ) )
{
FT_Int* darken_params = module->darken_params;
@@ -447,9 +404,6 @@
module->fallback_style = AF_STYLE_FALLBACK;
module->default_script = AF_SCRIPT_DEFAULT;
-#ifdef AF_CONFIG_OPTION_USE_WARPER
- module->warping = 0;
-#endif
module->no_stem_darkening = TRUE;
module->darken_params[0] = CFF_CONFIG_OPTION_DARKENING_PARAMETER_X1;
diff --git a/src/autofit/afmodule.h b/src/autofit/afmodule.h
index 5d1d9ca..c5bd468 100644
--- a/src/autofit/afmodule.h
+++ b/src/autofit/afmodule.h
@@ -37,9 +37,6 @@ FT_BEGIN_HEADER
FT_UInt fallback_style;
FT_UInt default_script;
-#ifdef AF_CONFIG_OPTION_USE_WARPER
- FT_Bool warping;
-#endif
FT_Bool no_stem_darkening;
FT_Int darken_params[8];
diff --git a/src/autofit/aftypes.h b/src/autofit/aftypes.h
index 6e63314..02a83da 100644
--- a/src/autofit/aftypes.h
+++ b/src/autofit/aftypes.h
@@ -172,7 +172,6 @@ extern void* _af_debug_hints;
#define AF_SCALER_FLAG_NO_HORIZONTAL 1U /* disable horizontal hinting */
#define AF_SCALER_FLAG_NO_VERTICAL 2U /* disable vertical hinting */
#define AF_SCALER_FLAG_NO_ADVANCE 4U /* disable advance hinting */
-#define AF_SCALER_FLAG_NO_WARPER 8U /* disable warper */
typedef struct AF_ScalerRec_
diff --git a/src/autofit/afwarp.c b/src/autofit/afwarp.c
deleted file mode 100644
index 8d6760f..0000000
--- a/src/autofit/afwarp.c
+++ /dev/null
@@ -1,373 +0,0 @@
-/****************************************************************************
- *
- * afwarp.c
- *
- * Auto-fitter warping algorithm (body).
- *
- * Copyright (C) 2006-2021 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.
- *
- */
-
-
- /*
- * The idea of the warping code is to slightly scale and shift a glyph
- * within a single dimension so that as much of its segments are aligned
- * (more or less) on the grid. To find out the optimal scaling and
- * shifting value, various parameter combinations are tried and scored.
- */
-
-#include "afwarp.h"
-
-#ifdef AF_CONFIG_OPTION_USE_WARPER
-
- /**************************************************************************
- *
- * The macro FT_COMPONENT is used in trace mode. It is an implicit
- * parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log
- * messages during execution.
- */
-#undef FT_COMPONENT
-#define FT_COMPONENT afwarp
-
-
- /* The weights cover the range 0/64 - 63/64 of a pixel. Obviously, */
- /* values around a half pixel (which means exactly between two grid */
- /* lines) gets the worst weight. */
-#if 1
- static const AF_WarpScore
- af_warper_weights[64] =
- {
- 35, 32, 30, 25, 20, 15, 12, 10, 5, 1, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, -1, -2, -5, -8,-10,-10,-20,-20,-30,-30,
-
- -30,-30,-20,-20,-10,-10, -8, -5, -2, -1, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 1, 5, 10, 12, 15, 20, 25, 30, 32,
- };
-#else
- static const AF_WarpScore
- af_warper_weights[64] =
- {
- 30, 20, 10, 5, 4, 4, 3, 2, 1, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, -1, -2, -2, -5, -5,-10,-10,-15,-20,
-
- -20,-15,-15,-10,-10, -5, -5, -2, -2, -1, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 4, 5, 10, 20,
- };
-#endif
-
-
- /* Score segments for a given `scale' and `delta' in the range */
- /* `xx1' to `xx2', and store the best result in `warper'. If */
- /* the new best score is equal to the old one, prefer the */
- /* value with a smaller distortion (around `base_distort'). */
-
- static void
- af_warper_compute_line_best( AF_Warper warper,
- FT_Fixed scale,
- FT_Pos delta,
- FT_Pos xx1,
- FT_Pos xx2,
- AF_WarpScore base_distort,
- AF_Segment segments,
- FT_Int num_segments )
- {
- FT_Int idx_min, idx_max, idx0;
- FT_Int nn;
- AF_WarpScore scores[65];
-
-
- for ( nn = 0; nn < 65; nn++ )
- scores[nn] = 0;
-
- idx0 = xx1 - warper->t1;
-
- /* compute minimum and maximum indices */
- {
- FT_Pos xx1min = warper->x1min;
- FT_Pos xx1max = warper->x1max;
- FT_Pos w = xx2 - xx1;
-
-
- if ( xx1min + w < warper->x2min )
- xx1min = warper->x2min - w;
-
- if ( xx1max + w > warper->x2max )
- xx1max = warper->x2max - w;
-
- idx_min = xx1min - warper->t1;
- idx_max = xx1max - warper->t1;
-
- if ( idx_min < 0 || idx_min > idx_max || idx_max > 64 )
- {
- FT_TRACE5(( "invalid indices:\n" ));
- FT_TRACE5(( " min=%d max=%d, xx1=%ld xx2=%ld,\n",
- idx_min, idx_max, xx1, xx2 ));
- FT_TRACE5(( " x1min=%ld x1max=%ld, x2min=%ld x2max=%ld\n",
- warper->x1min, warper->x1max,
- warper->x2min, warper->x2max ));
- return;
- }
- }
-
- for ( nn = 0; nn < num_segments; nn++ )
- {
- FT_Pos len = segments[nn].max_coord - segments[nn].min_coord;
- FT_Pos y0 = FT_MulFix( segments[nn].pos, scale ) + delta;
- FT_Pos y = y0 + ( idx_min - idx0 );
- FT_Int idx;
-
-
- /* score the length of the segments for the given range */
- for ( idx = idx_min; idx <= idx_max; idx++, y++ )
- scores[idx] += af_warper_weights[y & 63] * len;
- }
-
- /* find best score */
- {
- FT_Int idx;
-
-
- for ( idx = idx_min; idx <= idx_max; idx++ )
- {
- AF_WarpScore score = scores[idx];
- AF_WarpScore distort = base_distort + ( idx - idx0 );
-
-
- if ( score > warper->best_score ||
- ( score == warper->best_score &&
- distort < warper->best_distort ) )
- {
- warper->best_score = score;
- warper->best_distort = distort;
- warper->best_scale = scale;
- warper->best_delta = delta + ( idx - idx0 );
- }
- }
- }
- }
-
-
- /* Compute optimal scaling and delta values for a given glyph and */
- /* dimension. */
-
- FT_LOCAL_DEF( void )
- af_warper_compute( AF_Warper warper,
- AF_GlyphHints hints,
- AF_Dimension dim,
- FT_Fixed *a_scale,
- FT_Pos *a_delta )
- {
- AF_AxisHints axis;
- AF_Point points;
-
- FT_Fixed org_scale;
- FT_Pos org_delta;
-
- FT_Int nn, num_points, num_segments;
- FT_Int X1, X2;
- FT_Int w;
-
- AF_WarpScore base_distort;
- AF_Segment segments;
-
-
- /* get original scaling transformation */
- if ( dim == AF_DIMENSION_VERT )
- {
- org_scale = hints->y_scale;
- org_delta = hints->y_delta;
- }
- else
- {
- org_scale = hints->x_scale;
- org_delta = hints->x_delta;
- }
-
- warper->best_scale = org_scale;
- warper->best_delta = org_delta;
- warper->best_score = FT_INT_MIN;
- warper->best_distort = 0;
-
- axis = &hints->axis[dim];
- segments = axis->segments;
- num_segments = axis->num_segments;
- points = hints->points;
- num_points = hints->num_points;
-
- *a_scale = org_scale;
- *a_delta = org_delta;
-
- /* get X1 and X2, minimum and maximum in original coordinates */
- if ( num_segments < 1 )
- return;
-
-#if 1
- X1 = X2 = points[0].fx;
- for ( nn = 1; nn < num_points; nn++ )
- {
- FT_Int X = points[nn].fx;
-
-
- if ( X < X1 )
- X1 = X;
- if ( X > X2 )
- X2 = X;
- }
-#else
- X1 = X2 = segments[0].pos;
- for ( nn = 1; nn < num_segments; nn++ )
- {
- FT_Int X = segments[nn].pos;
-
-
- if ( X < X1 )
- X1 = X;
- if ( X > X2 )
- X2 = X;
- }
-#endif
-
- if ( X1 >= X2 )
- return;
-
- warper->x1 = FT_MulFix( X1, org_scale ) + org_delta;
- warper->x2 = FT_MulFix( X2, org_scale ) + org_delta;
-
- warper->t1 = AF_WARPER_FLOOR( warper->x1 );
- warper->t2 = AF_WARPER_CEIL( warper->x2 );
-
- /* examine a half pixel wide range around the maximum coordinates */
- warper->x1min = warper->x1 & ~31;
- warper->x1max = warper->x1min + 32;
- warper->x2min = warper->x2 & ~31;
- warper->x2max = warper->x2min + 32;
-
- if ( warper->x1max > warper->x2 )
- warper->x1max = warper->x2;
-
- if ( warper->x2min < warper->x1 )
- warper->x2min = warper->x1;
-
- warper->w0 = warper->x2 - warper->x1;
-
- if ( warper->w0 <= 64 )
- {
- warper->x1max = warper->x1;
- warper->x2min = warper->x2;
- }
-
- /* examine (at most) a pixel wide range around the natural width */
- warper->wmin = warper->x2min - warper->x1max;
- warper->wmax = warper->x2max - warper->x1min;
-
-#if 1
- /* some heuristics to reduce the number of widths to be examined */
- {
- int margin = 16;
-
-
- if ( warper->w0 <= 128 )
- {
- margin = 8;
- if ( warper->w0 <= 96 )
- margin = 4;
- }
-
- if ( warper->wmin < warper->w0 - margin )
- warper->wmin = warper->w0 - margin;
-
- if ( warper->wmax > warper->w0 + margin )
- warper->wmax = warper->w0 + margin;
- }
-
- if ( warper->wmin < warper->w0 * 3 / 4 )
- warper->wmin = warper->w0 * 3 / 4;
-
- if ( warper->wmax > warper->w0 * 5 / 4 )
- warper->wmax = warper->w0 * 5 / 4;
-#else
- /* no scaling, just translation */
- warper->wmin = warper->wmax = warper->w0;
-#endif
-
- for ( w = warper->wmin; w <= warper->wmax; w++ )
- {
- FT_Fixed new_scale;
- FT_Pos new_delta;
- FT_Pos xx1, xx2;
-
-
- /* compute min and max positions for given width, */
- /* assuring that they stay within the coordinate ranges */
- xx1 = warper->x1;
- xx2 = warper->x2;
- if ( w >= warper->w0 )
- {
- xx1 -= w - warper->w0;
- if ( xx1 < warper->x1min )
- {
- xx2 += warper->x1min - xx1;
- xx1 = warper->x1min;
- }
- }
- else
- {
- xx1 -= w - warper->w0;
- if ( xx1 > warper->x1max )
- {
- xx2 -= xx1 - warper->x1max;
- xx1 = warper->x1max;
- }
- }
-
- if ( xx1 < warper->x1 )
- base_distort = warper->x1 - xx1;
- else
- base_distort = xx1 - warper->x1;
-
- if ( xx2 < warper->x2 )
- base_distort += warper->x2 - xx2;
- else
- base_distort += xx2 - warper->x2;
-
- /* give base distortion a greater weight while scoring */
- base_distort *= 10;
-
- new_scale = org_scale + FT_DivFix( w - warper->w0, X2 - X1 );
- new_delta = xx1 - FT_MulFix( X1, new_scale );
-
- af_warper_compute_line_best( warper, new_scale, new_delta, xx1, xx2,
- base_distort,
- segments, num_segments );
- }
-
- {
- FT_Fixed best_scale = warper->best_scale;
- FT_Pos best_delta = warper->best_delta;
-
-
- hints->xmin_delta = FT_MulFix( X1, best_scale - org_scale )
- + best_delta;
- hints->xmax_delta = FT_MulFix( X2, best_scale - org_scale )
- + best_delta;
-
- *a_scale = best_scale;
- *a_delta = best_delta;
- }
- }
-
-#else /* !AF_CONFIG_OPTION_USE_WARPER */
-
- /* ANSI C doesn't like empty source files */
- typedef int _af_warp_dummy;
-
-#endif /* !AF_CONFIG_OPTION_USE_WARPER */
-
-/* END */
diff --git a/src/autofit/afwarp.h b/src/autofit/afwarp.h
deleted file mode 100644
index 53e50d6..0000000
--- a/src/autofit/afwarp.h
+++ /dev/null
@@ -1,66 +0,0 @@
-/****************************************************************************
- *
- * afwarp.h
- *
- * Auto-fitter warping algorithm (specification).
- *
- * Copyright (C) 2006-2021 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.
- *
- */
-
-
-#ifndef AFWARP_H_
-#define AFWARP_H_
-
-#include "afhints.h"
-
-FT_BEGIN_HEADER
-
-#define AF_WARPER_SCALE
-
-#define AF_WARPER_FLOOR( x ) ( (x) & ~FT_TYPEOF( x )63 )
-#define AF_WARPER_CEIL( x ) AF_WARPER_FLOOR( (x) + 63 )
-
-
- typedef FT_Int32 AF_WarpScore;
-
- typedef struct AF_WarperRec_
- {
- FT_Pos x1, x2;
- FT_Pos t1, t2;
- FT_Pos x1min, x1max;
- FT_Pos x2min, x2max;
- FT_Pos w0, wmin, wmax;
-
- FT_Fixed best_scale;
- FT_Pos best_delta;
- AF_WarpScore best_score;
- AF_WarpScore best_distort;
-
- } AF_WarperRec, *AF_Warper;
-
-
-#ifdef AF_CONFIG_OPTION_USE_WARPER
- FT_LOCAL( void )
- af_warper_compute( AF_Warper warper,
- AF_GlyphHints hints,
- AF_Dimension dim,
- FT_Fixed *a_scale,
- FT_Pos *a_delta );
-#endif
-
-
-FT_END_HEADER
-
-
-#endif /* AFWARP_H_ */
-
-
-/* END */
diff --git a/src/autofit/autofit.c b/src/autofit/autofit.c
index dc81f9f..665234f 100644
--- a/src/autofit/autofit.c
+++ b/src/autofit/autofit.c
@@ -30,7 +30,6 @@
#include "afmodule.c"
#include "afranges.c"
#include "afshaper.c"
-#include "afwarp.c"
/* END */
diff --git a/src/autofit/rules.mk b/src/autofit/rules.mk
index 74ed121..9d82a5a 100644
--- a/src/autofit/rules.mk
+++ b/src/autofit/rules.mk
@@ -40,7 +40,6 @@ AUTOF_DRV_SRC := $(AUTOF_DIR)/afangles.c \
$(AUTOF_DIR)/afmodule.c \
$(AUTOF_DIR)/afranges.c \
$(AUTOF_DIR)/afshaper.c \
- $(AUTOF_DIR)/afwarp.c
# AUTOF driver headers
#
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- [freetype2] cleanup-autofit 06fc6ad 2/3: Remove experimental auto-hinting 'warp' mode.,
Werner Lemberg <=