diff options
Diffstat (limited to 'src/3rdparty/freetype/src/base/ftsynth.c')
-rw-r--r-- | src/3rdparty/freetype/src/base/ftsynth.c | 107 |
1 files changed, 62 insertions, 45 deletions
diff --git a/src/3rdparty/freetype/src/base/ftsynth.c b/src/3rdparty/freetype/src/base/ftsynth.c index c28346707b..f32edd3388 100644 --- a/src/3rdparty/freetype/src/base/ftsynth.c +++ b/src/3rdparty/freetype/src/base/ftsynth.c @@ -1,37 +1,36 @@ -/***************************************************************************/ -/* */ -/* ftsynth.c */ -/* */ -/* FreeType synthesizing code for emboldening and slanting (body). */ -/* */ -/* Copyright 2000-2018 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 <ft2build.h> -#include FT_SYNTHESIS_H -#include FT_INTERNAL_DEBUG_H -#include FT_INTERNAL_OBJECTS_H -#include FT_OUTLINE_H -#include FT_BITMAP_H - - - /*************************************************************************/ - /* */ - /* 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. */ - /* */ +/**************************************************************************** + * + * ftsynth.c + * + * FreeType synthesizing code for emboldening and slanting (body). + * + * Copyright (C) 2000-2023 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 <freetype/ftsynth.h> +#include <freetype/internal/ftdebug.h> +#include <freetype/internal/ftobjs.h> +#include <freetype/ftoutln.h> +#include <freetype/ftbitmap.h> + + + /************************************************************************** + * + * 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 trace_synth +#define FT_COMPONENT synth /*************************************************************************/ @@ -47,6 +46,18 @@ FT_EXPORT_DEF( void ) FT_GlyphSlot_Oblique( FT_GlyphSlot slot ) { + /* Value '0x0366A' corresponds to a shear angle of about 12 degrees. */ + FT_GlyphSlot_Slant( slot, 0x0366A, 0 ); + } + + + /* documentation is in ftsynth.h */ + + FT_EXPORT_DEF( void ) + FT_GlyphSlot_Slant( FT_GlyphSlot slot, + FT_Fixed xslant, + FT_Fixed yslant ) + { FT_Matrix transform; FT_Outline* outline; @@ -62,13 +73,11 @@ /* we don't touch the advance width */ - /* For italic, simply apply a shear transform, with an angle */ - /* of about 12 degrees. */ - + /* For italic, simply apply a shear transform */ transform.xx = 0x10000L; - transform.yx = 0x00000L; + transform.yx = -yslant; - transform.xy = 0x0366AL; + transform.xy = xslant; transform.yy = 0x10000L; FT_Outline_Transform( outline, &transform ); @@ -89,8 +98,17 @@ FT_EXPORT_DEF( void ) FT_GlyphSlot_Embolden( FT_GlyphSlot slot ) { + FT_GlyphSlot_AdjustWeight( slot, 0x0AAA, 0x0AAA ); + } + + + FT_EXPORT_DEF( void ) + FT_GlyphSlot_AdjustWeight( FT_GlyphSlot slot, + FT_Fixed xdelta, + FT_Fixed ydelta ) + { FT_Library library; - FT_Face face; + FT_Size size; FT_Error error; FT_Pos xstr, ystr; @@ -99,16 +117,15 @@ return; library = slot->library; - face = slot->face; + size = slot->face->size; if ( slot->format != FT_GLYPH_FORMAT_OUTLINE && slot->format != FT_GLYPH_FORMAT_BITMAP ) return; - /* some reasonable strength */ - xstr = FT_MulFix( face->units_per_EM, - face->size->metrics.y_scale ) / 24; - ystr = xstr; + /* express deltas in pixels in 26.6 format */ + xstr = (FT_Pos)size->metrics.x_ppem * xdelta / 1024; + ystr = (FT_Pos)size->metrics.y_ppem * ydelta / 1024; if ( slot->format == FT_GLYPH_FORMAT_OUTLINE ) FT_Outline_EmboldenXY( &slot->outline, xstr, ystr ); @@ -130,7 +147,7 @@ if ( ( ystr >> 6 ) > FT_INT_MAX || ( ystr >> 6 ) < FT_INT_MIN ) { FT_TRACE1(( "FT_GlyphSlot_Embolden:" )); - FT_TRACE1(( "too strong emboldening parameter ystr=%d\n", ystr )); + FT_TRACE1(( "too strong emboldening parameter ystr=%ld\n", ystr )); return; } error = FT_GlyphSlot_Own_Bitmap( slot ); |