--- a/configure 2013-05-28 23:00:03.000000000 +0200 +++ b/configure 2014-03-07 19:21:57.063320787 +0100 @@ -13,6 +13,8 @@ # Call the `configure' script located in `builds/unix'. # +export LDFLAGS="$LDFLAGS -lm" + rm -f config.mk builds/unix/unix-def.mk builds/unix/unix-cc.mk # respect GNUMAKE environment variable for backwards compatibility --- a/devel/ftoption.h 2013-12-21 21:39:04.000000000 +0100 +++ b/devel/ftoption.h 2014-03-07 19:21:57.066654119 +0100 @@ -605,6 +605,17 @@ FT_BEGIN_HEADER /*************************************************************************/ /* */ + /* Define FT_CONFIG_OPTION_INFINALITY_PATCHSET if you want to enable */ + /* all additional infinality patches, which are configured via env */ + /* variables. */ + /* */ + /* This option requires TT_CONFIG_OPTION_SUBPIXEL_HINTING to */ + /* defined. */ + /* */ +#define FT_CONFIG_OPTION_INFINALITY_PATCHSET + + /*************************************************************************/ + /* */ /* If you define TT_CONFIG_OPTION_UNPATENTED_HINTING, a special version */ /* of the TrueType bytecode interpreter is used that doesn't implement */ /* any of the patented opcodes and algorithms. The patents related to */ --- a/include/config/ftoption.h 2014-03-01 12:27:34.000000000 +0100 +++ b/include/config/ftoption.h 2014-03-07 19:21:57.066654119 +0100 @@ -92,7 +92,7 @@ FT_BEGIN_HEADER /* This is done to allow FreeType clients to run unmodified, forcing */ /* them to display normal gray-level anti-aliased glyphs. */ /* */ -/* #define FT_CONFIG_OPTION_SUBPIXEL_RENDERING */ +#define FT_CONFIG_OPTION_SUBPIXEL_RENDERING /*************************************************************************/ @@ -600,11 +600,22 @@ FT_BEGIN_HEADER /* This option requires TT_CONFIG_OPTION_BYTECODE_INTERPRETER to be */ /* defined. */ /* */ -/* #define TT_CONFIG_OPTION_SUBPIXEL_HINTING */ +#define TT_CONFIG_OPTION_SUBPIXEL_HINTING /*************************************************************************/ /* */ + /* Define FT_CONFIG_OPTION_INFINALITY_PATCHSET if you want to enable */ + /* all additional infinality patches, which are configured via env */ + /* variables. */ + /* */ + /* This option requires TT_CONFIG_OPTION_SUBPIXEL_HINTING to */ + /* defined. */ + /* */ +#define FT_CONFIG_OPTION_INFINALITY_PATCHSET + + /*************************************************************************/ + /* */ /* If you define TT_CONFIG_OPTION_UNPATENTED_HINTING, a special version */ /* of the TrueType bytecode interpreter is used that doesn't implement */ /* any of the patented opcodes and algorithms. The patents related to */ --- a/src/autofit/aflatin.c 2014-11-19 16:53:15.576938625 +0100 +++ b/src/autofit/aflatin.c 2014-11-19 16:53:42.147096030 +0100 @@ -24,6 +24,7 @@ #include "afpic.h" #include "aflatin.h" #include "aferrors.h" +#include "strings.h" #ifdef AF_CONFIG_OPTION_USE_WARPER @@ -40,6 +41,10 @@ #undef FT_COMPONENT #define FT_COMPONENT trace_aflatin +#ifdef FT_CONFIG_OPTION_INFINALITY_PATCHSET +FT_Pos infinality_cur_width = 0; +#endif + /*************************************************************************/ /*************************************************************************/ @@ -892,8 +897,33 @@ FT_Pos delta; AF_LatinAxis axis; FT_UInt nn; +#ifdef FT_CONFIG_OPTION_INFINALITY_PATCHSET + int checked_adjust_heights_env = 0; + FT_Bool adjust_heights = FALSE; + if ( checked_adjust_heights_env == 0 ) + { + char *adjust_heights_env = + getenv( "INFINALITY_FT_AUTOHINT_INCREASE_GLYPH_HEIGHTS" ); + if ( adjust_heights_env != NULL ) + { + if ( strcasecmp(adjust_heights_env, "default" ) != 0 ) + { + if ( strcasecmp(adjust_heights_env, "true") == 0 ) + adjust_heights = TRUE; + else if ( strcasecmp(adjust_heights_env, "1") == 0 ) + adjust_heights = TRUE; + else if ( strcasecmp(adjust_heights_env, "on") == 0 ) + adjust_heights = TRUE; + else if ( strcasecmp(adjust_heights_env, "yes") == 0 ) + adjust_heights = TRUE; + } + } + checked_adjust_heights_env = 1; + } +#endif /* FT_CONFIG_OPTION_INFINALITY_PATCHSET */ + if ( dim == AF_DIMENSION_HORZ ) { scale = scaler->x_scale; @@ -920,7 +950,7 @@ { AF_LatinAxis Axis = &metrics->axis[AF_DIMENSION_VERT]; AF_LatinBlue blue = NULL; - + int threshold = 40; for ( nn = 0; nn < Axis->blue_count; nn++ ) { @@ -930,7 +960,12 @@ break; } } - +#ifdef FT_CONFIG_OPTION_INFINALITY_PATCHSET + if ( adjust_heights && + metrics->root.scaler.face->size->metrics.x_ppem < 15 && + metrics->root.scaler.face->size->metrics.x_ppem > 5 ) + threshold = 52; +#endif /* FT_CONFIG_OPTION_INFINALITY_PATCHSET */ if ( blue ) { FT_Pos scaled; @@ -1049,7 +1084,13 @@ /* a blue zone is only active if it is less than 3/4 pixels tall */ dist = FT_MulFix( blue->ref.org - blue->shoot.org, scale ); + +#ifdef FT_CONFIG_OPTION_INFINALITY_PATCHSET + /* Do at low ppems ( ~< 200 ), in order to prevent fringes */ + if ( dist <= 256 && dist >= -256 ) +#else if ( dist <= 48 && dist >= -48 ) +#endif /* FT_CONFIG_OPTION_INFINALITY_PATCHSET */ { #if 0 FT_Pos delta1; @@ -1100,7 +1141,12 @@ delta2 = -delta2; blue->ref.fit = FT_PIX_ROUND( blue->ref.cur ); +#ifdef FT_CONFIG_OPTION_INFINALITY_PATCHSET + /* Round to prevent fringes */ + blue->shoot.fit = FT_PIX_ROUND( blue->ref.fit - delta2 ); +#else blue->shoot.fit = blue->ref.fit - delta2; +#endif /* FT_CONFIG_OPTION_INFINALITY_PATCHSET */ #endif @@ -1913,7 +1959,10 @@ dist = edge->fpos - blue->shoot.org; if ( dist < 0 ) dist = -dist; - +#ifdef FT_CONFIG_OPTION_INFINALITY_PATCHSET + /* round down to pixels */ + /*dist = FT_MulFix( dist, scale ) & ~63;*/ +#endif dist = FT_MulFix( dist, scale ); if ( dist < best_dist ) { @@ -2079,8 +2128,31 @@ FT_Pos dist = width; FT_Int sign = 0; FT_Int vertical = ( dim == AF_DIMENSION_VERT ); +#ifdef FT_CONFIG_OPTION_INFINALITY_PATCHSET + FT_Int infinality_dist = 0; + FT_UInt autohint_snap_stem_height = 0; + FT_UInt checked_autohint_snap_stem_height = 0; + + + if ( checked_autohint_snap_stem_height == 0 ) + { + char *autohint_snap_stem_height_env = + getenv( "INFINALITY_FT_AUTOHINT_SNAP_STEM_HEIGHT" ); + if ( autohint_snap_stem_height_env != NULL ) + { + sscanf ( autohint_snap_stem_height_env, "%u", + &autohint_snap_stem_height ); + if ( autohint_snap_stem_height > 100 ) + autohint_snap_stem_height = 100; + else if ( autohint_snap_stem_height < 0 ) + autohint_snap_stem_height = 0; + } + checked_autohint_snap_stem_height = 1; + } + if ( autohint_snap_stem_height == 0 ) +#endif /* FT_CONFIG_OPTION_INFINALITY_PATCHSET */ if ( !AF_LATIN_HINTS_DO_STEM_ADJUST( hints ) || axis->extra_light ) return width; @@ -2090,9 +2162,73 @@ dist = -width; sign = 1; } +#ifdef FT_CONFIG_OPTION_INFINALITY_PATCHSET + /* Calculate snap value differently than standard freetype */ + if ( autohint_snap_stem_height > 0 && + ( ( vertical && !AF_LATIN_HINTS_DO_VERT_SNAP( hints ) ) || + ( !vertical && !AF_LATIN_HINTS_DO_HORZ_SNAP( hints ) ) ) ) + { + infinality_dist = af_latin_snap_width( axis->widths, + axis->width_count, dist ); + + if ( metrics->root.scaler.face->size->metrics.x_ppem > 9 && + axis->width_count > 0 && + abs( axis->widths[0].cur - infinality_dist ) < 32 && + axis->widths[0].cur > 52 ) + { + if ( strstr( metrics->root.scaler.face->style_name, "Regular" ) || + strstr( metrics->root.scaler.face->style_name, "Book" ) || + strstr( metrics->root.scaler.face->style_name, "Medium" ) || + strcmp( metrics->root.scaler.face->style_name, "Italic" ) == 0 || + strcmp( metrics->root.scaler.face->style_name, "Oblique" ) == 0 ) + { + /* regular weight */ + if ( axis->widths[0].cur < 64 ) + infinality_dist = 64; + else if ( axis->widths[0].cur < 88 ) + infinality_dist = 64; + else if ( axis->widths[0].cur < 160 ) + infinality_dist = 128; + else if ( axis->widths[0].cur < 240 ) + infinality_dist = 190; + else infinality_dist = ( infinality_dist ) & ~63; + } + else + { + /* bold gets a different threshold */ + if ( axis->widths[0].cur < 64 ) + infinality_dist = 64 ; + else if ( axis->widths[0].cur < 108 ) + infinality_dist = 64; + else if ( axis->widths[0].cur < 160 ) + infinality_dist = 128; + else if ( axis->widths[0].cur < 222 ) + infinality_dist = 190; + else if ( axis->widths[0].cur < 288 ) + infinality_dist = 254; + else infinality_dist = ( infinality_dist + 16 ) & ~63; + } + + } + if ( infinality_dist < 52 ) + { + if ( metrics->root.scaler.face->size->metrics.x_ppem < 9 ) + { + if ( infinality_dist < 32 ) + infinality_dist = 32; + } + else + infinality_dist = 64; + } + } + else if ( autohint_snap_stem_height < 100 && + ( ( vertical && !AF_LATIN_HINTS_DO_VERT_SNAP( hints ) ) || + ( !vertical && !AF_LATIN_HINTS_DO_HORZ_SNAP( hints ) ) ) ) +#else - if ( ( vertical && !AF_LATIN_HINTS_DO_VERT_SNAP( hints ) ) || + if ( ( vertical && !AF_LATIN_HINTS_DO_VERT_SNAP( hints ) ) || ( !vertical && !AF_LATIN_HINTS_DO_HORZ_SNAP( hints ) ) ) +#endif /* FT_CONFIG_OPTION_INFINALITY_PATCHSET */ { /* smooth hinting process: very lightly quantize the stem width */ @@ -2152,6 +2288,9 @@ } } else +#ifdef FT_CONFIG_OPTION_INFINALITY_PATCHSET + if ( autohint_snap_stem_height < 100 ) +#endif /* FT_CONFIG_OPTION_INFINALITY_PATCHSET */ { /* strong hinting process: snap the stem width to integer pixels */ @@ -2159,7 +2298,10 @@ dist = af_latin_snap_width( axis->widths, axis->width_count, dist ); - +#ifdef FT_CONFIG_OPTION_INFINALITY_PATCHSET + if ( autohint_snap_stem_height > 0 ) + goto Done_Width; +#endif /* FT_CONFIG_OPTION_INFINALITY_PATCHSET */ if ( vertical ) { /* in the case of vertical hinting, always round */ @@ -2222,6 +2364,32 @@ } Done_Width: +#ifdef FT_CONFIG_OPTION_INFINALITY_PATCHSET + if ( axis->widths[0].cur > 42 ) + /* weighted average */ + dist = (dist * ( 100 - autohint_snap_stem_height ) + + infinality_dist * autohint_snap_stem_height ) / 100; + + { + int factor = 100; + if ( axis->standard_width < 100 ) + factor = axis->standard_width; + + if ( metrics->root.scaler.face->size->metrics.x_ppem >= 9 && dist < 52 ) + dist += ( (52 - dist) * factor ) / 100; + if ( metrics->root.scaler.face->size->metrics.x_ppem < 9 && dist < 32 ) + dist += ( (32 - dist) * factor ) / 100; + + if ( axis->standard_width > 100 && + metrics->root.scaler.face->size->metrics.x_ppem >= 11 && + dist < 64 ) + dist = 64; + if ( axis->standard_width > 100 && + metrics->root.scaler.face->size->metrics.x_ppem >= 9 && + dist < 52 ) + dist = 52; + } +#endif /* FT_CONFIG_OPTION_INFINALITY_PATCHSET */ if ( sign ) dist = -dist; @@ -2244,6 +2412,8 @@ (AF_Edge_Flags)base_edge->flags, (AF_Edge_Flags)stem_edge->flags ); +/* if fitted_width causes stem_edge->pos to land basically on top of an existing + * stem_edge->pos, then add or remove 64. Need to figure out a way to do this */ stem_edge->pos = base_edge->pos + fitted_width; @@ -2807,8 +2977,32 @@ int dim; AF_LatinAxis axis; +#ifdef FT_CONFIG_OPTION_INFINALITY_PATCHSET + FT_Int emboldening_strength = 0; + FT_Bool checked_use_various_tweaks_env = FALSE; + FT_Bool use_various_tweaks = FALSE; - + if ( !checked_use_various_tweaks_env ) + { + char *use_various_tweaks_env = + getenv( "INFINALITY_FT_USE_VARIOUS_TWEAKS" ); + if ( use_various_tweaks_env != NULL ) + { + if ( strcasecmp(use_various_tweaks_env, "default" ) != 0 ) + { + if ( strcasecmp(use_various_tweaks_env, "true") == 0 ) + use_various_tweaks = TRUE; + else if ( strcasecmp(use_various_tweaks_env, "1") == 0 ) + use_various_tweaks = TRUE; + else if ( strcasecmp(use_various_tweaks_env, "on") == 0 ) + use_various_tweaks = TRUE; + else if ( strcasecmp(use_various_tweaks_env, "yes") == 0 ) + use_various_tweaks = TRUE; + } + } + checked_use_various_tweaks_env = TRUE; + } +#endif /* FT_CONFIG_OPTION_INFINALITY_PATCHSET */ error = af_glyph_hints_reload( hints, outline ); if ( error ) goto Exit; @@ -2874,7 +3068,11 @@ } af_glyph_hints_save( hints, outline ); - +#ifdef FT_CONFIG_OPTION_INFINALITY_PATCHSET + { + infinality_cur_width = metrics->axis->widths[0].cur; + } +#endif /* FT_CONFIG_OPTION_INFINALITY_PATCHSET */ Exit: return error; } --- a/src/base/ftlcdfil.c 2014-11-25 22:31:38.852289541 +0100 +++ b/src/base/ftlcdfil.c 2014-11-25 22:32:42.963771758 +0100 @@ -23,6 +23,9 @@ #include FT_IMAGE_H #include FT_INTERNAL_OBJECTS_H +#include +#include +#include #ifdef FT_CONFIG_OPTION_SUBPIXEL_RENDERING @@ -309,10 +312,53 @@ { 0x00, 0x55, 0x56, 0x55, 0x00 }; /* the values here sum up to a value larger than 256, */ /* providing a cheap gamma correction */ - static const FT_Byte default_filter[5] = + static FT_Byte default_filter[5] = { 0x10, 0x40, 0x70, 0x40, 0x10 }; +#ifdef FT_CONFIG_OPTION_INFINALITY_PATCHSET + int checked_filter_params_env = 0; + if ( checked_filter_params_env == 0 ) + { + char *filter_params = getenv( "INFINALITY_FT_FILTER_PARAMS" ); + if ( filter_params != NULL && strcmp( filter_params, "" ) != 0 ) + { + float f1, f2, f3, f4, f5; + if ( strcasecmp( filter_params, "default" ) != 0 ) + { + int args_assigned = 0; + args_assigned = sscanf ( filter_params, + "%f %f %f %f %f", + &f1, &f2, &f3, &f4, &f5 ); + + if ( args_assigned == 5 ) + { + if ( f1 + f2 + f3 + f4 + f5 > 5 ) + { + /* Assume we were given integers instead of floats */ + /* 0 to 100 */ + default_filter[0] = (FT_Byte) ( f1 * 2.55f + 0.5f ); + default_filter[1] = (FT_Byte) ( f2 * 2.55f + 0.5f ); + default_filter[2] = (FT_Byte) ( f3 * 2.55f + 0.5f ); + default_filter[3] = (FT_Byte) ( f4 * 2.55f + 0.5f ); + default_filter[4] = (FT_Byte) ( f5 * 2.55f + 0.5f ); + } + else + { + /* Assume we were given floating point values */ + /* 0 to 1.0 */ + default_filter[0] = (FT_Byte) ( f1 * 255.0f + 0.5f ); + default_filter[1] = (FT_Byte) ( f2 * 255.0f + 0.5f ); + default_filter[2] = (FT_Byte) ( f3 * 255.0f + 0.5f ); + default_filter[3] = (FT_Byte) ( f4 * 255.0f + 0.5f ); + default_filter[4] = (FT_Byte) ( f5 * 255.0f + 0.5f ); + } + } + } + } + checked_filter_params_env = 1; + } +#endif if ( !library ) return FT_THROW( Invalid_Library_Handle ); --- a/src/base/ftobjs.c 2014-12-01 22:41:50.032792254 +0100 +++ b/src/base/ftobjs.c 2014-12-01 22:42:27.714056361 +0100 @@ -67,6 +67,11 @@ #define GRID_FIT_METRICS +#ifdef FT_CONFIG_OPTION_INFINALITY_PATCHSET +#include +#include +#include "../autofit/aflatin.h" +#endif FT_BASE_DEF( FT_Pointer ) ft_service_list_lookup( FT_ServiceDesc service_descriptors, @@ -543,6 +548,25 @@ ft_lookup_glyph_renderer( FT_GlyphSlot slot ); +#ifdef FT_CONFIG_OPTION_INFINALITY_PATCHSET + static void + ft_glyphslot_enlarge_metrics( FT_GlyphSlot slot, + FT_Render_Mode mode ) + { + FT_Glyph_Metrics* metrics = &slot->metrics; + FT_Pos enlarge_cbox = 0; + + + /* enlarge for grayscale rendering */ + if ( mode == FT_RENDER_MODE_NORMAL ) + enlarge_cbox = 64; + + metrics->horiBearingX -= enlarge_cbox; + metrics->width += 2 * enlarge_cbox; + } +#endif /* FT_CONFIG_OPTION_INFINALITY_PATCHSET */ + + #ifdef GRID_FIT_METRICS static void ft_glyphslot_grid_fit_metrics( FT_GlyphSlot slot, @@ -601,8 +625,40 @@ FT_Bool autohint = FALSE; FT_Module hinter; TT_Face ttface = (TT_Face)face; +#ifdef FT_CONFIG_OPTION_INFINALITY_PATCHSET + int checked_use_various_tweaks_env = FALSE; + FT_Bool use_various_tweaks = FALSE; + + if ( !checked_use_various_tweaks_env ) + { + char *use_various_tweaks_env = + getenv( "INFINALITY_FT_USE_VARIOUS_TWEAKS" ); + if ( use_various_tweaks_env != NULL ) + { + if ( strcasecmp(use_various_tweaks_env, "default" ) != 0 ) + { + if ( strcasecmp(use_various_tweaks_env, "true") == 0 ) + use_various_tweaks = TRUE; + else if ( strcasecmp(use_various_tweaks_env, "1") == 0 ) + use_various_tweaks = TRUE; + else if ( strcasecmp(use_various_tweaks_env, "on") == 0 ) + use_various_tweaks = TRUE; + else if ( strcasecmp(use_various_tweaks_env, "yes") == 0 ) + use_various_tweaks = TRUE; + } + } + checked_use_various_tweaks_env = 1; + } + + /* Force autohint if no tt instructions */ + /* NOTE: NEEDS TO BE RUN LATER IN CODE???? */ + /*if ( use_various_tweaks && + ttface->num_locations && + ttface->max_profile.maxSizeOfInstructions == 0 ) + load_flags |= FT_LOAD_FORCE_AUTOHINT;*/ +#endif if ( !face || !face->size || !face->glyph ) return FT_THROW( Invalid_Face_Handle ); @@ -690,6 +746,18 @@ { FT_AutoHinter_Interface hinting; +#ifdef FT_CONFIG_OPTION_INFINALITY_PATCHSET + if ( use_various_tweaks ) + { + /* Force slight hinting over full hinting always */ + load_flags &= ~FT_LOAD_TARGET_LCD; + load_flags &= ~FT_LOAD_TARGET_LCD_V; + load_flags &= ~FT_LOAD_TARGET_MONO; + load_flags &= ~FT_LOAD_TARGET_NORMAL; + load_flags |= FT_LOAD_TARGET_LIGHT; + /*printf("%d ", load_flags);*/ + } +#endif /* try to load embedded bitmaps first if available */ /* */ @@ -735,6 +803,18 @@ if ( error ) goto Exit; +#ifdef FT_CONFIG_OPTION_INFINALITY_PATCHSET + infinality_cur_width = 0; + + { + /* fix for sdl_ttf */ + FT_Render_Mode mode = FT_LOAD_TARGET_MODE( load_flags ); + + if ( slot->format == FT_GLYPH_FORMAT_OUTLINE ) + ft_glyphslot_enlarge_metrics( slot, mode ); + } +#endif + if ( slot->format == FT_GLYPH_FORMAT_OUTLINE ) { /* check that the loaded outline is correct */ --- a/src/base/ftoutln.c 2014-12-01 22:40:34.438380192 +0100 +++ b/src/base/ftoutln.c 2014-12-01 22:43:55.562934868 +0100 @@ -910,7 +910,34 @@ FT_Vector v_prev, v_first, v_next, v_cur; FT_Int c, n, first; FT_Int orientation; +#ifdef FT_CONFIG_OPTION_INFINALITY_PATCHSET + int checked_use_various_tweaks_env = 0; + FT_Bool use_various_tweaks = FALSE; + if ( checked_use_various_tweaks_env == 0 ) + { + char *use_various_tweaks_env + = getenv( "INFINALITY_FT_USE_VARIOUS_TWEAKS" ); + if ( use_various_tweaks_env != NULL ) + { + if ( strcasecmp(use_various_tweaks_env, "default" ) != 0 ) + { + if ( strcasecmp(use_various_tweaks_env, "true" ) == 0 ) + use_various_tweaks = TRUE; + else if ( strcasecmp(use_various_tweaks_env, "1" ) == 0 ) + use_various_tweaks = TRUE; + else if ( strcasecmp(use_various_tweaks_env, "on" ) == 0 ) + use_various_tweaks = TRUE; + else if ( strcasecmp(use_various_tweaks_env, "yes" ) == 0 ) + use_various_tweaks = TRUE; + } + } + checked_use_various_tweaks_env = 1; + } + + if ( use_various_tweaks ) + ystrength = FT_PIX_FLOOR ( ystrength ); +#endif if ( !outline ) return FT_THROW( Invalid_Outline ); --- a/src/base/ftsynth.c 2014-12-01 22:54:33.836922242 +0100 +++ b/src/base/ftsynth.c 2014-12-01 22:54:37.193688546 +0100 @@ -93,7 +93,32 @@ FT_Face face; FT_Error error; FT_Pos xstr, ystr; +#ifdef FT_CONFIG_OPTION_INFINALITY_PATCHSET + int checked_use_various_tweaks_env = 0; + FT_Bool use_various_tweaks = FALSE; + + if ( checked_use_various_tweaks_env == 0 ) + { + char *use_various_tweaks_env + = getenv( "INFINALITY_FT_USE_VARIOUS_TWEAKS" ); + if ( use_various_tweaks_env != NULL ) + { + if ( strcasecmp(use_various_tweaks_env, "default" ) != 0 ) + { + if ( strcasecmp(use_various_tweaks_env, "true" ) == 0 ) + use_various_tweaks = TRUE; + else if ( strcasecmp(use_various_tweaks_env, "1" ) == 0 ) + use_various_tweaks = TRUE; + else if ( strcasecmp(use_various_tweaks_env, "on" ) == 0 ) + use_various_tweaks = TRUE; + else if ( strcasecmp(use_various_tweaks_env, "yes" ) == 0 ) + use_various_tweaks = TRUE; + } + } + checked_use_various_tweaks_env = 1; + } +#endif if ( !slot ) return; @@ -111,8 +136,16 @@ ystr = xstr; if ( slot->format == FT_GLYPH_FORMAT_OUTLINE ) + { +#ifdef FT_CONFIG_OPTION_INFINALITY_PATCHSET + if ( use_various_tweaks ) + (void)FT_Outline_EmboldenXY( &slot->outline, + xstr, + FT_PIX_FLOOR( ystr ) ); + else +#endif FT_Outline_EmboldenXY( &slot->outline, xstr, ystr ); - + } else /* slot->format == FT_GLYPH_FORMAT_BITMAP */ { /* round to full pixels */ @@ -150,6 +183,9 @@ slot->metrics.width += xstr; slot->metrics.height += ystr; +#ifdef FT_CONFIG_OPTION_INFINALITY_PATCHSET + if ( !use_various_tweaks ) +#endif slot->metrics.horiAdvance += xstr; slot->metrics.vertAdvance += ystr; slot->metrics.horiBearingY += ystr; --- a/src/smooth/ftsmooth.c 2014-12-04 23:07:46.585780090 +0100 +++ b/src/smooth/ftsmooth.c 2014-12-04 23:08:41.802156790 +0100 @@ -26,6 +26,17 @@ #include "ftsmerrs.h" +#ifdef FT_CONFIG_OPTION_INFINALITY_PATCHSET +#include +#include "../../include/ftbitmap.h" +#include +#include "../autofit/aflatin.h" +#include "../../include/ftoutln.h" + +#define verbose FALSE +#define STVALUES if (verbose) \ + printf ( "scale:%f translate:%ld ", *scale_value, *translate_value ); +#endif /* FT_CONFIG_OPTION_INFINALITY_PATCHSET */ /* initialize renderer -- init its raster */ static FT_Error @@ -93,6 +104,2993 @@ FT_Outline_Get_CBox( &slot->outline, cbox ); } +#ifdef FT_CONFIG_OPTION_INFINALITY_PATCHSET + static FT_Fixed FT_FixedFromFloat(float f) + { + short value = f; + unsigned short fract = (f - value) * 0xFFFF; + + + return (FT_Fixed)((long)value << 16 | (unsigned long)fract ); + } + + + /* ChromeOS sharpening algorithm */ + /* soften the sub-pixel anti-aliasing and sharpen */ + static void + _ft_lcd_chromeos_sharpen( FT_Bitmap* bitmap, + FT_Render_Mode mode, + FT_Byte cutoff, + double gamma_value ) + { + static FT_Bool initialized_gamma = FALSE; + static unsigned short gamma_ramp[256]; + FT_UInt width = (FT_UInt)bitmap->width; + FT_UInt height = (FT_UInt)bitmap->rows; + int ii; + + if ( !initialized_gamma ) + { + initialized_gamma = TRUE; + /* linear to voltage */ + for ( ii = 0; ii < 256; ii++ ) + { + gamma_ramp[ii] = (unsigned char) + ( pow( (double)ii / 255.0, gamma_value ) * 255.0f ); + if ( gamma_ramp[ii] < cutoff ) + gamma_ramp[ii] = 0; + } + } + + /* horizontal in-place sub-pixel sharpening filter */ + if ( mode == FT_RENDER_MODE_LCD ) + { + FT_Byte* line = bitmap->buffer; + + + for ( ; height > 0; height--, line += bitmap->pitch ) + { + FT_UInt xx; + + + for ( xx = 0; xx < width; xx++ ) + line[xx] = gamma_ramp[line[xx]]; + } + } + } + + /* simple linear scale to handle various sliding values */ + float + sliding_scale ( int min_value, + int max_value, + float min_amount, + float max_amount, + int cur_value ) + { + + float m = ( min_amount - max_amount ) / (float)( min_value - max_value ); + float result = ( ( (float)cur_value * m) + ( max_amount - max_value * m ) ) ; + + if ( min_amount < max_amount ) + { + if ( result < min_amount ) + return min_amount; + if ( result > max_amount ) + return max_amount; + } + else + { + if ( result < max_amount ) + return max_amount; + if ( result > min_amount ) + return min_amount; + } + + return result; + } + + + /* brightness and contrast adjustment on the bitmap */ + static FT_Bool + _ft_bitmap_bc ( FT_Bitmap* bitmap, + float brightness, + float contrast ) + { + + FT_UInt width = (FT_UInt)bitmap->width; + FT_UInt height = (FT_UInt)bitmap->rows; + FT_Byte* line = bitmap->buffer; + FT_UInt xx; + + + if ( brightness == 0 && contrast == 0 ) + return FALSE; + + for ( height = (FT_UInt)bitmap->rows; + height > 0; + height--, line += bitmap->pitch ) + { + for ( xx = 0; xx < width - 1; xx += 1 ) + { + if ( line[xx] > 0) + { + float value = (float)( 255 - line[xx] ) / 256.0; + FT_Int result = 0; + + if ( brightness < 0.0 ) + value = value * ( 1.0 + brightness ); + else + value = value + ( ( 1.0 - value ) * brightness ); + + value = ( value - 0.5 ) * + ( tan ( ( contrast + 1.0 ) * 3.141592/4.0 ) ) + 0.5; + + result = (FT_Int)( 255.0 - value * 256.0 ); + + if ( result < 0 ) + result = 0; + if ( result > 255 ) + result = 255; + + line[xx] = result; + } + } + } + return TRUE; + } + + + /* Filter to mimic Windows-style sharpening */ + /* Determined via 100% experimentation. */ + static void + _ft_lcd_windows_sharpen( FT_Bitmap* bitmap, + FT_Render_Mode mode, + FT_UInt strength, + FT_Library library ) + { + + FT_UInt width = (FT_UInt)bitmap->width; + FT_UInt height = (FT_UInt)bitmap->rows; + FT_Byte* new_line; + FT_Byte* line = bitmap->buffer; + FT_Bitmap new_bitmap; + + + FT_Bitmap_New( &new_bitmap ); + FT_Bitmap_Copy( library, bitmap, &new_bitmap ); + new_line = (&new_bitmap)->buffer; + + if (strength > 0) + for (height = (FT_UInt)bitmap->rows; + height > 0; + height--, line += bitmap->pitch, new_line += bitmap->pitch ) + { + FT_UInt xx, threshold = 128; + FT_Byte* prevline = line - bitmap->pitch; + FT_Byte* nextline = line + bitmap->pitch; + FT_Byte* new_prevline = new_line - bitmap->pitch; + FT_Byte* new_nextline = new_line + bitmap->pitch; + + for ( xx = 1; xx < width - 1; xx += 1 ) + { + /* subpixel grid sp11 sp21 sp31 */ + /* where sp22 is sp12 sp22 sp32 */ + /* current subpixel. sp13 sp23 sp33 */ + + FT_Int prevtotal, nexttotal, lefttotal, righttotal, sidesdiff, + prevdiff, nextdiff, sp11, sp21, sp31, sp12, sp22, sp32, + sp13, sp23, sp33; + + sp12 = line [xx-1]; + sp22 = line [xx]; + sp32 = line [xx+1]; + + if ( height == bitmap->rows ) + { + prevtotal = sp11 = sp21 = sp31 = 0; + prevdiff = sp22; + lefttotal = sp12 + sp13; + righttotal = sp32 + sp33; + } + else + { + prevtotal = prevline[xx-1] + prevline[xx] + prevline[xx+1]; + sp11 = prevline [xx-1]; + sp21 = prevline [xx]; + sp31 = prevline [xx+1]; + prevdiff = sp22 - sp21; + lefttotal = sp11 + sp12 + sp13; + righttotal = sp31 + sp32 + sp33; + } + + if ( height == 1 ) + { + nexttotal = sp13 = sp23 = sp33 = 0; + nextdiff = sp22; + lefttotal = sp11 + sp12; + righttotal = sp31 + sp32; + } + else + { + nexttotal = nextline[xx-1] + nextline[xx] + nextline[xx+1]; + sp13 = nextline [xx-1]; + sp23 = nextline [xx]; + sp33 = nextline [xx+1]; + nextdiff = sp23 - sp22; + lefttotal = sp11 + sp12 + sp13; + righttotal = sp31 + sp32 + sp33; + } + + sidesdiff = lefttotal - righttotal; + + if ( sidesdiff < 0 ) + sidesdiff *= -1; + + if ( prevdiff < 0 ) + prevdiff *= -1; + + if ( nextdiff < 0 ) + nextdiff *= -1; + + /* if the current pixel is less than threshold, and greater than 0 */ + if ( sp22 <= threshold && sp22 > 0 ) + { + /* A pixel is horizontally isolated if: */ + /* 1: All upper adjecent pixels are >= threshold */ + if ( prevtotal >= nexttotal && + abs( sp11 - sp12 ) > 5 && + abs( sp21 - sp22 ) > 5 && + abs( sp31 - sp32 ) > 5 && /* not a vert stem end */ + sp11 >= threshold && + sp21 >= threshold && + sp31 >= threshold && + abs( sp23 - sp22 ) > 15 ) /* not on a vert stem */ + { + /* darken upper adjacent subpixel; lighten current */ + if ( height != (FT_UInt)bitmap->rows ) + new_prevline[xx] += ( ( 255 - new_prevline[xx] ) + * strength ) / 100 ; + + new_line[xx] -= ( new_line[xx] * strength ) / 100; + + if ( height != 1 && height != (FT_UInt)bitmap->rows ) + if ( new_nextline[xx] > 155 + ( 100 - strength ) ) + new_prevline[xx] = 255; + + } + else if ( nexttotal > prevtotal && + abs( sp13 - sp12 ) > 5 && + abs( sp23 - sp22 ) > 5 && + abs( sp33 - sp32 ) > 5 && + /* 2: All lower adjecent pixels are >= threshold */ + sp13 >= threshold && + sp23 >= threshold && + sp33 >= threshold && + abs( sp22 - sp21 ) > 15 ) + { + /* darken lower adjacent subpixel; lighten current */ + if ( height != 1 ) + new_nextline[xx] += ( 255 - new_nextline[xx] ) * strength / 100; + + new_line[xx] -= ( new_line[xx] * strength ) / 100; + + if ( height != 1 ) + if ( new_nextline[xx] > 155 + ( 100 - strength ) ) + new_nextline[xx] = 255; + + } + } + else if ( sp22 > threshold && sp22 < 255 ) + { + if ( sp11 <= threshold && + abs( sp13 - sp12 ) > 5 && + abs( sp23 - sp22 ) > 5 && + abs( sp33 - sp32 ) > 5 && + sp21 <= threshold && + sp31 <= threshold && + prevtotal <= nexttotal && + abs( sp22 - sp21 ) > 15 ) + { + /* bring this subpixel 1/3 of the way to 255 at 100% strength */ + new_line[xx] += ( strength * ( 255 - new_line[xx] ) ) / 100; + + if ( height != (FT_UInt)bitmap->rows ) + new_prevline[xx] -= ( new_prevline[xx] * strength ) / 300; + } + else if ( sp13 <= threshold && + abs( sp11 - sp12 ) > 5 && + abs( sp21 - sp22 ) > 5 && + abs( sp31 - sp32 ) > 5 && + sp23 <= threshold && + sp33 <= threshold && + nexttotal < prevtotal && + abs( sp23 - sp22 ) > 15 ) + { + new_line[xx] += ( strength * ( 255 - new_line[xx] ) ) / 100; + + if ( height != 1 ) + new_nextline[xx] -= ( new_nextline[xx] * strength ) / 300; + } + } + } + } + FT_Bitmap_Copy( library, &new_bitmap, bitmap); + FT_Bitmap_Done( library, &new_bitmap ); + } + + + static void + _ft_lcd_darken_x ( FT_Bitmap* bitmap, + FT_Render_Mode mode, + FT_UInt strength, + FT_Library library ) + { + + FT_UInt width = (FT_UInt)bitmap->width; + FT_UInt height = (FT_UInt)bitmap->rows; + FT_Byte* new_line; + FT_Byte* line = bitmap->buffer; + FT_Bitmap new_bitmap; + int factor1, factor2; + int bias = 0; + + FT_Bitmap_New( &new_bitmap ); + + FT_Bitmap_Copy( library, bitmap, &new_bitmap ); + new_line = (&new_bitmap)->buffer; + + if ( strength > 0 ) + for ( height = (FT_UInt)bitmap->rows; + height > 0; + height--, line += bitmap->pitch, new_line += bitmap->pitch ) + { + FT_UInt xx; + FT_Byte* prevline = line - bitmap->pitch; + FT_Byte* nextline = line + bitmap->pitch; + + for ( xx = 1; xx < width - 1; xx += 1 ) + { + /* subpixel grid sp11 sp21 sp31 */ + /* where sp22 is sp12 sp22 sp32 */ + /* current subpixel. sp13 sp23 sp33 */ + + FT_Int sp21, sp12, sp22, sp32, sp23; + + sp12 = line [xx-1]; + sp22 = line [xx]; + sp32 = line [xx+1]; + + if ( height == bitmap->rows ) + sp21 = 0; + else + sp21 = prevline [xx]; + + if ( height == 1 ) + sp23 = 0; + else + sp23 = nextline [xx]; + + /* darken subpixel if neighbor above and below are much less than */ + /* safer but less effective */ + factor1 = 5; + factor2 = 5; + + /* make matches in the middle of glyph slightly darker */ + /*if (height > 1 && height < (FT_UInt)bitmap->rows) bias = 1;*/ + + if ( sp22 > factor1 * sp21 && + sp22 > factor1 * sp23 && + sp22 > factor2 && + sp12 > 16 && + sp32 > 16 ) + if ( new_line[xx] < ( strength * 255 ) / 100 ) + new_line[xx] = (strength * 255 ) / 100 + + bias * ( 255 - ( strength * 255 ) / 100 ) / 3; + + } + } + FT_Bitmap_Copy( library, &new_bitmap, bitmap ); + FT_Bitmap_Done( library, &new_bitmap ); + } + + + static void + _ft_lcd_darken_y ( FT_Bitmap* bitmap, + FT_Render_Mode mode, + FT_UInt strength, + FT_Library library ) + { + + FT_UInt width = (FT_UInt)bitmap->width; + FT_UInt height = (FT_UInt)bitmap->rows; + FT_Byte* new_line; + FT_Byte* line = bitmap->buffer; + FT_Bitmap new_bitmap; + + + FT_Bitmap_New( &new_bitmap ); + FT_Bitmap_Copy( library, bitmap, &new_bitmap ); + new_line = (&new_bitmap)->buffer; + + if ( strength > 0 ) + for ( height = (FT_UInt)bitmap->rows; + height > 0; + height--, line += bitmap->pitch, new_line += bitmap->pitch ) + { + FT_UInt xx; + + + for ( xx = 1; xx < width - 1; xx += 1 ) + { + if ( line[xx] > line[xx-1] && line[xx] > line[xx+1] ) + { + if (new_line[xx] > 0) + new_line[xx] += ( strength * ( 255 - new_line[xx] ) ) / 100; + new_line[xx-1] += ( strength * ( 255 - line[xx-1] ) ) / 100; + new_line[xx+1] += ( strength * ( 255 - line[xx+1] ) ) / 100; + } + } + } + FT_Bitmap_Copy( library, &new_bitmap, bitmap ); + FT_Bitmap_Done( library, &new_bitmap ); + } + + + static void + _ft_bitmap_cap ( FT_Bitmap* bitmap, + FT_UInt strength, + FT_Library library ) + { + + FT_UInt width = (FT_UInt)bitmap->width; + FT_UInt height = (FT_UInt)bitmap->rows; + FT_Byte* new_line; + FT_Byte* line = bitmap->buffer; + FT_UInt cur_value = 0; + FT_Bitmap new_bitmap; + + + FT_Bitmap_New( &new_bitmap ); + FT_Bitmap_Copy( library, bitmap, &new_bitmap ); + new_line = (&new_bitmap)->buffer; + + if ( strength > 0 ) + for ( height = (FT_UInt)bitmap->rows; + height > 0; + height--, line += bitmap->pitch, new_line += bitmap->pitch ) + { + FT_UInt xx; + + + for ( xx = 1; xx < width - 1; xx += 1 ) + { + cur_value = ( new_line[xx-1] + new_line[xx] + new_line[xx+1] ) / 3; + if ( cur_value > ( strength * 255 ) / 100 ) + { + FT_UInt new_factor = ( strength * 255 ) / 100; + new_line[xx] = ( new_line[xx] * new_factor ) / cur_value; + new_line[xx+1] = ( new_line[xx+1] * new_factor ) / cur_value; + new_line[xx-1] = ( new_line[xx-1] * new_factor ) / cur_value; + } + } + } + FT_Bitmap_Copy( library, &new_bitmap, bitmap ); + FT_Bitmap_Done( library, &new_bitmap ); + } + + + int + pseudo_gamma ( int val, float value ) + { + return 256 * ( 1.0 - pow( ( 1.0 - (float)val / 256.0 ), 1.0 / value ) ); + } + + + + static void + _ft_bitmap_embolden ( FT_Bitmap* bitmap, + FT_UInt strength, + FT_Library library ) + { + + FT_UInt width = (FT_UInt)bitmap->width; + FT_UInt height = (FT_UInt)bitmap->rows; + FT_Byte* new_line; + FT_Byte* line = bitmap->buffer; + FT_Bitmap new_bitmap; + FT_UInt xx; + + + FT_Bitmap_New(&new_bitmap); + FT_Bitmap_Copy(library, bitmap, &new_bitmap); + new_line = (&new_bitmap)->buffer; + + if ( strength > 0 ) + for ( height = (FT_UInt)bitmap->rows; + height > 0; + height--, line += bitmap->pitch, new_line += bitmap->pitch ) + { + for ( xx = 1; xx < width - 1; xx += 1 ) + { + FT_Int new_value = 0; + + + new_value = ( strength * line [xx-1] ) / 100 + + pseudo_gamma( line [xx], .75 ) + + (strength * line [xx+1] ) / 100; + if ( new_value > 255 ) + new_value = 255; + + new_line[xx] = new_value; + } + } + FT_Bitmap_Copy( library, &new_bitmap, bitmap ); + FT_Bitmap_Done( library, &new_bitmap ); + } + + + + static void + _ft_bitmap_gamma ( FT_Bitmap* bitmap, + float strength ) + { + + FT_UInt width = (FT_UInt)bitmap->width; + FT_UInt height = (FT_UInt)bitmap->rows; + FT_Byte* line = bitmap->buffer; + FT_UInt xx; + + + if ( strength > 0 ) + for ( height = (FT_UInt)bitmap->rows; + height > 0; + height--, line += bitmap->pitch ) + { + + for ( xx = 1; xx < width - 1; xx += 1 ) + { + if ( abs( line[xx-1] - line[xx] ) < 20 || + abs( line[xx+1] - line[xx] ) < 20 ) + line [xx] = pseudo_gamma( line [xx], strength ) ; + } + } + } + + + /* Fringe filter */ + static void + _ft_lcd_fringe_filter ( FT_Bitmap* bitmap, + FT_Render_Mode mode, + FT_UInt strength, + FT_Library library ) + { + + FT_UInt width = (FT_UInt)bitmap->width; + FT_UInt height = (FT_UInt)bitmap->rows; + FT_Byte* new_line; + FT_Byte* line = bitmap->buffer; + FT_Bitmap new_bitmap; + + + FT_Bitmap_New(&new_bitmap); + + line = bitmap->buffer; + FT_Bitmap_Copy( library, bitmap, &new_bitmap ); + new_line = (&new_bitmap)->buffer; + + for ( height = (FT_UInt)bitmap->rows; + height > 0; + height--, line += bitmap->pitch, new_line += bitmap->pitch ) + { + /* Threshold set to 1/2 pixel intensity */ + FT_UInt xx, threshold = 128; + + /* Hack to make this work when bitmap is at first or last line */ + FT_Int fudge = bitmap->pitch * (height == (FT_UInt)bitmap->rows); + + FT_Byte* prevline = line - bitmap->pitch + fudge; + FT_Byte* nextline = line + bitmap->pitch; + + + for ( xx = 1; xx < width - 1; xx += 1 ) + { + /* subpixel grid sp11 sp21 sp31 */ + /* where sp22 is sp12 sp22 sp32 */ + /* current subpixel. sp13 sp23 sp33 */ + + FT_Int prevtotal, nexttotal, lefttotal, righttotal, sidesdiff, + leftdiff, rightdiff, prevdiff, nextdiff, sp11, sp21, sp31, + sp12, sp22, sp32, sp13, sp23, sp33; + + sp12 = line [xx-1]; + sp22 = line [xx]; + sp32 = line [xx+1]; + + /* if at max height fake out some values */ + if ( height == (FT_UInt)bitmap->rows ) + { + prevtotal = sp11 = sp21 = sp31 = 0; + prevdiff = sp22; + lefttotal = sp12 + sp13; + righttotal = sp32 + sp33; + } + else + { + prevtotal = prevline[xx-1] + prevline[xx] + prevline[xx+1]; + sp11 = prevline [xx-1]; + sp21 = prevline [xx]; + sp31 = prevline [xx+1]; + prevdiff = sp22 - sp21; + lefttotal = sp11 + sp12 + sp13; + righttotal = sp31 + sp32 + sp33; + } + + /* if at min height fake out some values */ + if ( height == 1 ) + { + nexttotal = sp13 = sp23 = sp33 = 0; + nextdiff = sp22; + lefttotal = sp11 + sp12; + righttotal = sp31 + sp32; + } + else + { + nexttotal = nextline[xx-1] + nextline[xx] + nextline[xx+1]; + sp13 = nextline [xx-1]; + sp23 = nextline [xx]; + sp33 = nextline [xx+1]; + nextdiff = sp23 - sp22; + lefttotal = sp11 + sp12 + sp13; + righttotal = sp31 + sp32 + sp33; + } + + sidesdiff = lefttotal - righttotal; + leftdiff = sp22 - sp12; + rightdiff = sp32 - sp22; + + if ( sidesdiff < 0 ) + sidesdiff *= -1; + + if ( prevdiff < 0 ) + prevdiff *= -1; + + if ( nextdiff < 0 ) + nextdiff *= -1; + + if ( leftdiff < 0 ) + leftdiff *= -1; + + if ( rightdiff < 0 ) + rightdiff *= -1; + + /* if the current subpixel is less than threshold, and varies only + slightly to left or right, lighten it */ + if ( sp22 <= threshold && sp22 > 0 && + ( leftdiff < 10 || rightdiff < 10 ) ) + { + /* A pixel is horizontally isolated if: */ + /* 1: All upper adjecent subpixels are >= threshold and all lower + adjacent ones are essentially white */ + if ( prevtotal >= nexttotal && + sp11 >= threshold && + sp21 >= threshold && + sp31 >= threshold && + sp13 < 2 && + sp23 < 2 && + sp33 < 2 ) + + { + new_line[xx] -= ( new_line[xx] * strength ) / 100; + + if ( leftdiff < 10 ) + /* OPPORTUNITY FOR IMPROVEMENT - keep going left until 255? */ + new_line[xx-1] -= ( new_line[xx-1] * strength ) / 200; + + if ( rightdiff < 10 ) + /* OPPORTUNITY FOR IMPROVEMENT */ + new_line[xx+1] -= ( new_line[xx+1] * strength ) / 200; + } + else if ( nexttotal > prevtotal && + /* 2: the inverse of above */ + sp13 >= threshold && + sp23 >= threshold && + sp33 >= threshold && + sp11 < 2 && + sp21 < 2 && + sp31 < 2 ) + { + new_line[xx] -= ( new_line[xx] * strength ) / 100; + + if ( leftdiff < 10 ) + /* OPPORTUNITY FOR IMPROVEMENT - keep going left until 255? */ + new_line[xx-1] -= ( new_line[xx-1] * strength ) / 200; + + if ( rightdiff < 10 ) + /* OPPORTUNITY FOR IMPROVEMENT */ + new_line[xx+1] -= ( new_line[xx+1] * strength ) / 200; + } + } + /* otherwise if the current subpixel is more than threshold, and varies + slightly to left or right, darken it */ + else if ( sp22 > threshold && + sp22 < 255 && + ( leftdiff < 10 || + rightdiff < 10 ) ) + { + if ( sp11 <= 2 && + sp21 <= 2 && + sp31 <= 2 && + sp13 >= threshold && + sp23 >= threshold && + sp33 >= threshold && + prevtotal < nexttotal ) + new_line[xx] += ( ( 255 - new_line[xx] ) * strength ) / 100; + + else if ( sp13 <= 2 && + sp23 <= 2 && + sp33 <= 2 && + nexttotal < prevtotal && + sp11 >= threshold && + sp21 >= threshold && + sp31 >= threshold ) + new_line[xx] += ( ( 255 - new_line[xx] ) * strength ) / 100; + + } + } + } + FT_Bitmap_Copy( library, &new_bitmap, bitmap ); + FT_Bitmap_Done( library, &new_bitmap ); + } + + + /* Grayscale filter */ + static void + _ft_lcd_grayscale_filter ( FT_Bitmap* bitmap, + FT_Render_Mode mode, + FT_UInt strength, + FT_Library library ) + { + + FT_UInt width = (FT_UInt)bitmap->width; + FT_UInt height = (FT_UInt)bitmap->rows; + FT_Byte* line = bitmap->buffer; + + + for ( height = (FT_UInt)bitmap->rows; + height > 0; + height--, line += bitmap->pitch ) + { + FT_UInt xx; + + + for ( xx = 0; xx < width - 1; xx += 3 ) + { + FT_UInt total = line [xx] + line [xx + 1] + line [xx + 2]; + line[xx] = ( ( 100 - strength ) * line[xx] + + strength * ( total / 3 ) ) / 100; + line[xx+1] = ( ( 100 - strength ) * line[xx+1] + + strength * ( total / 3 ) ) / 100; + line[xx+2] = ( ( 100 - strength ) * line[xx+2] + + strength * ( total / 3 ) ) / 100; + } + } + } + + + + /*************************************************************************/ + /* */ + /* */ + /* */ + /* */ + /* */ + /* */ + + + typedef struct SA_Rule_ + { + const char family[32]; + const int ppem[5]; + + } SA_Rule; + +#define STEM_WIDTH_2_PPEM 18 +#define MAX_PPEM 100 + + + +/* "Font name", {ppem where stem width becomes 1, + * ppem where stem width becomes 2... etc.} */ +/* 100 means auto-calculate */ +#define SNAPPING_STEM_WIDTHS_RULES_SIZE 21 + SA_Rule SNAPPING_STEM_WIDTHS_Rules + [SNAPPING_STEM_WIDTHS_RULES_SIZE] = + { + { "Andale Mono", {10, 21, MAX_PPEM, MAX_PPEM, MAX_PPEM} }, + { "Arial Narrow", {10, 21, MAX_PPEM, MAX_PPEM, MAX_PPEM} }, + { "Calibri", {10, 19, MAX_PPEM, MAX_PPEM, MAX_PPEM} }, + { "Cantarell", {10, 22, MAX_PPEM, MAX_PPEM, MAX_PPEM} }, + { "Century Gothic", {10, 22, MAX_PPEM, MAX_PPEM, MAX_PPEM} }, + { "Comfortaa", {10, 19, 22, MAX_PPEM, MAX_PPEM} }, + { "Consolas", {10, 20, MAX_PPEM, MAX_PPEM, MAX_PPEM} }, + { "Corbel", {10, 21, MAX_PPEM, MAX_PPEM, MAX_PPEM} }, + { "Futura", {10, 14, STEM_WIDTH_2_PPEM, MAX_PPEM, MAX_PPEM} }, + { "Gill Sans", {10, 17, STEM_WIDTH_2_PPEM, MAX_PPEM, MAX_PPEM} }, + { "Helvetica CY", {10, 23, MAX_PPEM, MAX_PPEM, MAX_PPEM} }, + { "Inconsolata", {10, 23, MAX_PPEM, MAX_PPEM, MAX_PPEM} }, + { "Liberation Sans Narrow", {10, 22, MAX_PPEM, MAX_PPEM, MAX_PPEM} }, + { "Liberation Sans", {10, 19, MAX_PPEM, MAX_PPEM, MAX_PPEM} }, + { "Lucida Grande", {10, 16, STEM_WIDTH_2_PPEM, MAX_PPEM, MAX_PPEM} }, + { "Lucida Sans Unicode", {10, 16, STEM_WIDTH_2_PPEM, MAX_PPEM, MAX_PPEM} }, + { "Luxi Sans", {10, 17, STEM_WIDTH_2_PPEM, MAX_PPEM, MAX_PPEM} }, + { "Open Sans", {10, 20, MAX_PPEM, MAX_PPEM, MAX_PPEM} }, + { "Rokkitt", {10, 21, MAX_PPEM, MAX_PPEM, MAX_PPEM} }, + { "Segoe UI", {10, 23, MAX_PPEM, MAX_PPEM, MAX_PPEM} }, + { "Trebuchet MS", {10, 17, STEM_WIDTH_2_PPEM, MAX_PPEM, MAX_PPEM} }, + }; + + +/* "Font name", {ppem, scale_up=1|scale_down=0} */ +#define SNAPPING_STEM_SCALING_RULES_SIZE 31 + SA_Rule SNAPPING_STEM_SCALING_Rules + [SNAPPING_STEM_SCALING_RULES_SIZE] = + { + { "Andale Mono", {11, 1,} }, + { "Bitstream Vera Sans", {12, 1,} }, + { "Calibri", {15, 1,} }, + { "Calibri", {17, 1,} }, + { "Calibri", {18, 1,} }, + { "Candara", {14, 1,} }, + { "Candara", {17, 1,} }, + { "Canwell", {13, 0,} }, + { "Comfortaa", {11, 0,} }, + { "Consolas", {11, 1,} }, + { "DejaVu Sans", {12, 1,} }, + { "Freesans", {16, 0,} }, + { "Freeserif", {13, 1,} }, + { "Freeserif", {17, 1,} }, + { "Inconsolata", {12, 1,} }, + { "Inconsolata", {15, 1,} }, + { "Lucida Grande", {13, 1,} }, + { "Myriad Pro", {14, 1,} }, + { "Myriad Pro", {17, 1,} }, + { "Nina", {11, 0,} }, + { "Nina", {12, 0,} }, + { "Nina", {13, 0,} }, + { "Optima", {17, 1,} }, + { "Raleway", {15, 0,} }, + { "Samba", {11, 0,} }, + { "Times New Roman", {17, 1,} }, + { "Trebuchet MS", {17, 0,} }, + { "Trebuchet MS", {13, 0,} }, + { "Trebuchet MS", {20, 1,} }, + { "Verdana", {12, 1,} }, + { "Verdana", {15, 1,} }, + }; + + +/* "Font name", {ppem, scale_up=1|scale_down=0} */ +#define SNAPPING_M_RULES_SIZE 9 + SA_Rule SNAPPING_M_Rules + [SNAPPING_M_RULES_SIZE] = + { + { "Courier New", {13, 1,} }, + { "Courier New", {14, 1,} }, + { "Courier", {13, 1,} }, + { "Courier", {14, 1,} }, + { "Droid Sans Mono", {12, 0,} }, + { "Bitstream Vera Sans", {12, 0,} }, + { "DejaVu Sans", {12, 0,} }, + { "Essential PragmataPro", {13, 0,} }, + { "Essential PragmataPro", {14, 0,} }, + }; + + +/* "Font name", {ppem, ppem} */ +#define SNAPPING_SYNTHESIZE_STEMS_RULES_SIZE 1 + SA_Rule SNAPPING_SYNTHESIZE_STEMS_Rules + [SNAPPING_SYNTHESIZE_STEMS_RULES_SIZE] = + { + { "---", {13, 13,} }, + }; + + +/* "Font name", {ppem, ppem} */ +#define SNAPPING_NO_BEARING_CORRECTION_RULES_SIZE 1 + SA_Rule SNAPPING_NO_BEARING_CORRECTION_Rules + [SNAPPING_NO_BEARING_CORRECTION_RULES_SIZE] = + { + { "Times New Roman", {0, 100,} }, + }; + + +/* "Font name", {ppem, ppem} */ +#define SNAPPING_EDGE_DETECTION_RULES_SIZE 8 + SA_Rule SNAPPING_EDGE_DETECTION_Rules + [SNAPPING_EDGE_DETECTION_RULES_SIZE] = + { + { "Tahoma", {11, 11,} }, + { "Courier New", {10, 12,} }, + { "Arial", {11, 11,} }, + { "Arial", {13, 13,} }, + { "Liberation Sans", {11, 11,} }, + { "FreeSans", {11, 11,} }, + { "FreeSans", {13, 13,} }, + { "Palatino Linotype", {0, 100,} }, + }; + +/* "Font name", {ppem, translate_value} */ +#define SNAPPING_STEM_TRANSLATING_RULES_SIZE 6 + SA_Rule SNAPPING_STEM_TRANSLATING_Rules + [SNAPPING_STEM_TRANSLATING_RULES_SIZE] = + { + { "Arial", {11, 32,} }, + { "Arial Unicode MS", {11, 32,} }, + { "FreeSans", {11, 32,} }, + { "Arimo", {11, 32,} }, + { "Liberation Sans", {11, 32,} }, + { "Tahoma", {11, 32,} }, + }; + +/* "Font name", {ppem, translate_value} */ +#define SNAPPING_STEM_TRANSLATING_ONLY_RULES_SIZE 74 + SA_Rule SNAPPING_STEM_TRANSLATING_ONLY_Rules + [SNAPPING_STEM_TRANSLATING_ONLY_RULES_SIZE] = + { + { "Arial Unicode MS", {10, 16,} }, + { "Arial Unicode MS", {8, 32,} }, + { "Arial Unicode MS", {9, 32,} }, + { "Arial", {10, 16,} }, + { "Arial", {8, 32,} }, + { "Arial", {9, 32,} }, + { "Arial", {16, -24,} }, + { "Arimo", {10, 8,} }, + { "Arimo", {8, 32,} }, + { "Arimo", {9, 32,} }, + { "Bitstream Vera Sans", {8, 16,} }, + { "Calibri", {10, 16,} }, + { "Calibri", {15, 0,} }, + { "Candara", {10, 16,} }, + { "Cantarell", {11, 0} }, + { "Cantarell", {12, 0} }, + { "Consolas", {8, 32,} }, + { "Consolas", {9, 32,} }, + { "Corbel", {10, 16,} }, + { "Courier", {13, 16,} }, + { "Courier", {15, 0,} }, + { "Dejavu Sans Mono", {7, 16,} }, + { "Dejavu Sans Mono", {8, 32,} }, + { "Dejavu Sans Mono", {9, 16,} }, + { "Dejavu Sans", {8, 16,} }, + { "Dejavu Sans", {15, -20,} }, + { "Droid Sans", {8, 16,} }, + { "Droid Sans", {9, 16,} }, + { "Freesans", {10, 16,} }, + { "Freesans", {9, 8,} }, + { "Georgia", {13, 16,} }, + { "Georgia", {14, 16,} }, + { "Georgia", {15, 0,} }, + { "Inconsolata", {10, 24,} }, + { "Inconsolata", {9, 32,} }, + { "Liberation Sans", {10, 8,} }, + { "Liberation Sans", {8, 32,} }, + { "Liberation Sans", {9, 32,} }, + { "Lucida Grande", {13, 24,} }, + { "Lucida Grande", {14, 24,} }, + { "Lucida Grande", {8, 16,} }, + { "Lucida Grande", {9, 16,} }, + { "Lucida Sans Unicode", {13, 24,} }, + { "Lucida Sans Unicode", {14, 24,} }, + { "Lucida Sans Unicode", {8, 16,} }, + { "Lucida Sans Unicode", {9, 16,} }, + { "Microsoft Sans Serif", {10, 16,} }, + { "Microsoft Sans Serif", {8, 32,} }, + { "Microsoft Sans Serif", {9, 32,} }, + { "Myriad Pro", {10, 16,} }, + { "Myriad Pro", {11, 0,} }, + { "Myriad Pro", {9, 16,} }, + { "Open Sans", {10, 16,} }, + { "Open Sans", {9, 16,} }, + { "Optima", {10, 0} }, + { "Optima", {11, 0} }, + { "Optima", {12, 0} }, + { "Segoe UI", {10, 0,} }, + { "Segoe UI", {7, 32,} }, + { "Segoe UI", {8, 16,} }, + { "Segoe UI", {9, 24,} }, + { "Tahoma", {7, 32,} }, + { "Tahoma", {8, 32,} }, + { "Tahoma", {9, 32,} }, + { "Times New Roman", {17, 8,} }, + { "Trebuchet MS", {10, 16,} }, + { "Trebuchet MS", {11, 0,} }, + { "Trebuchet MS", {8, 32,} }, + { "Trebuchet MS", {9, 32,} }, + { "Verdana", {8, 16,} }, + { "Verdana", {15, 16,} }, + { "Verdana", {14, 32,} }, + { "Verdana", {18, 32,} }, + { "Verdana", {19, 24,} }, + }; + + +/* "Font name", {start ppem, end ppem} */ +#define ALWAYS_USE_100_RULES_SIZE 46 + SA_Rule ALWAYS_USE_100_Rules + [ALWAYS_USE_100_RULES_SIZE] = + { + { "Andale Mono", {0, MAX_PPEM,} }, + { "Arial Unicode MS", {0, MAX_PPEM,} }, + { "Arial", {0, MAX_PPEM,} }, + { "Arimo", {0, MAX_PPEM,} }, + { "Bitstream Vera Sans Mono", {0, MAX_PPEM,} }, + { "Bitstream Vera Sans", {10, 14,} }, + { "Bitstream Vera Sans", {16, 17,} }, + { "Calibri", {23, MAX_PPEM,} }, + { "Consolas", {0, MAX_PPEM,} }, + { "Courier New", {12, 12,} }, + { "Courier", {0, MAX_PPEM,} }, + { "Cousine", {0, MAX_PPEM,} }, + { "DejaVu Sans Mono", {0, MAX_PPEM,} }, + { "DejaVu Sans", {10, 14,} }, + { "DejaVu Sans", {16, 17,} }, + { "Droid Sans", {12, 12,} }, + { "Droid Sans", {15, 15,} }, + { "FreeMono", {0, MAX_PPEM,} }, + { "FreeSans", {0, MAX_PPEM,} }, + { "Liberation Mono", {0, MAX_PPEM,} }, + { "Lucida Console", {0, MAX_PPEM,} }, + { "Luxi Sans", {13, 13,} }, + { "Microsoft Sans Serif", {0, MAX_PPEM,} }, + { "Monaco", {0, MAX_PPEM,} }, + { "Segoe UI", {11, 12,} }, + { "Segoe UI", {14, 14,} }, + { "Tahoma", {11, 11,} }, + { "Tahoma", {14, MAX_PPEM,} }, + { "Times New Roman", {14, 14,} }, + { "Times New Roman", {16, 16,} }, + { "Trebuchet MS", {13, 13,} }, + { "Ubuntu", {12, 13,} }, + { "Ubuntu", {15, 15,} }, + { "Verdana", {0, 14,} }, + { "Verdana", {16, MAX_PPEM,} }, + { "Pragmata", {0, MAX_PPEM,} }, + { "Essential PragmataPro", {0, MAX_PPEM,} }, + }; + + + + +#define AUTOHINT_BRIGHTNESS_RULES_SIZE 3 + SA_Rule BRIGHTNESS_Rules + [AUTOHINT_BRIGHTNESS_RULES_SIZE] = + { + { "Baskerville", {0, -20,} }, + { "Garamond", {0, -20,} }, + { "Optima", {0, -20,} }, + }; + +#define AUTOHINT_CONTRAST_RULES_SIZE 3 + SA_Rule CONTRAST_Rules + [AUTOHINT_CONTRAST_RULES_SIZE] = + { + { "Baskerville", {0, 25,} }, + { "Garamond", {0, 25,} }, + { "Optima", {0, 25,} }, + }; + +#if 0 +#define STEM_SPACING_RULES_SIZE 3 + SA_Rule STEM_SPACING_Rules + [STEM_SPACING_RULES_SIZE] = + { + { "Tahoma", {10, 12, 18, 18, 30} }, + { "Arial", {10, 11, 23, 25, 30} }, + { "Freesans", {10, 12, 18, 18, 30} }, + }; + +#define STEM_START_RULES_SIZE 3 + SA_Rule STEM_START_Rules + [STEM_START_RULES_SIZE] = + { + { "Tahoma", {14, 17, 30, 100, 100} }, + { "Arial", {11, 18, 23, 30, 30} }, + { "Freesans", {10, 18, 18, 25, 30} }, + }; +#endif + + typedef struct Stem_Data_ + { + FT_Int stem_width; + FT_Int stem_spacing; + FT_Int stem_start; + FT_Int stem_scaling; + FT_Int stem_translating_only; + FT_Int stem_translating; + FT_Int brightness; + FT_Int contrast; + FT_Bool use_100; + FT_Bool synth_stems; + FT_Bool edge_detection; + FT_Bool bearing_correction; + FT_Int m; + } Stem_Data; + + + typedef struct Stem_Segment_ + { + FT_Long x1; + FT_Long x2; + FT_Int y; + } Stem_Segment; + + typedef struct Stem_Center_ + { + FT_Long x; + FT_Long y; + FT_Long w; + FT_Long x1; + FT_Long x2; + } Stem_Center; + + typedef struct Stem_ + { + FT_Long center; + FT_Long count; + FT_Long rcount; /* used to count within a range in possible stems */ + FT_Long width; + FT_Long height; + FT_Short zone; /* 1 2 or 3 */ + FT_Bool generated; + } Stem; + + + static void + swap_stem ( Stem* s1, Stem* s2 ) + { + Stem s; + s.center = s1->center; + s.count = s1->count; + s.rcount = s1->rcount; + s.width = s1->width; + s.zone = s1->zone; + s.generated = s1->generated; + + s1->center = s2->center; + s1->count = s2->count; + s1->rcount = s2->rcount; + s1->width = s2->width; + s1->zone = s2->zone; + s1->generated = s2->generated; + + s2->center = s.center; + s2->count = s.count; + s2->rcount = s.rcount; + s2->width = s.width; + s2->zone = s.zone; + s2->generated = s.generated; + } + + + FT_LOCAL_DEF( void ) + sa_fill_known_stem_values ( + FT_String* family, + int ppem, + FT_String* style, + FT_UInt num_stems, + Stem_Data* known_stem_values ) + { + FT_Int i, j; + if (verbose) printf("%s ", family); + + i = 0; + while ( i < SNAPPING_STEM_WIDTHS_RULES_SIZE ) + { + if ( family && + ( strcasecmp( SNAPPING_STEM_WIDTHS_Rules[i].family, + family ) == 0 ) ) + { + j = 0; + known_stem_values->stem_width = 1; + + while (j < 4) + { + if ( SNAPPING_STEM_WIDTHS_Rules[i].ppem[j] == MAX_PPEM ) + { + known_stem_values->stem_width = -1; /* use default */ + j = 5; + i = SNAPPING_STEM_WIDTHS_RULES_SIZE; + } + else if ( ppem < SNAPPING_STEM_WIDTHS_Rules[i].ppem[j] ) + { + known_stem_values->stem_width = j; + j = 5; + i = SNAPPING_STEM_WIDTHS_RULES_SIZE; + } + j++; + } + } + i++; + } + + i = 0; + while ( i < SNAPPING_STEM_SCALING_RULES_SIZE ) + { + if ( family && + ( strcasecmp( SNAPPING_STEM_SCALING_Rules[i].family, + family ) == 0 ) ) + { + known_stem_values->stem_scaling = -1; /* default */ + + if ( ppem == SNAPPING_STEM_SCALING_Rules[i].ppem[0] ) + { + known_stem_values->stem_scaling + = SNAPPING_STEM_SCALING_Rules[i].ppem[1]; + i = SNAPPING_STEM_SCALING_RULES_SIZE; + } + } + i++; + } + + + i = 0; + while ( i < SNAPPING_M_RULES_SIZE ) + { + if ( family && + ( strcasecmp( SNAPPING_M_Rules[i].family, family ) == 0 ) ) + { + known_stem_values->m = -1; /* default */ + + if ( ppem == SNAPPING_M_Rules[i].ppem[0] ) + { + known_stem_values->m = SNAPPING_M_Rules[i].ppem[1]; + i = SNAPPING_M_RULES_SIZE; + } + } + i++; + } + + i = 0; + while ( i < SNAPPING_STEM_TRANSLATING_ONLY_RULES_SIZE ) + { + if ( family && + ( strcasecmp( SNAPPING_STEM_TRANSLATING_ONLY_Rules[i].family, + family ) == 0 ) ) + { + known_stem_values->stem_translating_only = -1024; /* default */ + + if ( ppem == SNAPPING_STEM_TRANSLATING_ONLY_Rules[i].ppem[0] || + SNAPPING_STEM_TRANSLATING_ONLY_Rules[i].ppem[0] == 0 ) + { + known_stem_values->stem_translating_only + = SNAPPING_STEM_TRANSLATING_ONLY_Rules[i].ppem[1]; + i = SNAPPING_STEM_TRANSLATING_ONLY_RULES_SIZE; + } + } + i++; + } + + i = 0; + while ( i < SNAPPING_STEM_TRANSLATING_RULES_SIZE ) + { + if ( family && + ( strcasecmp( SNAPPING_STEM_TRANSLATING_Rules[i].family, + family ) == 0 ) ) + { + known_stem_values->stem_translating = 0; /* default */ + + if ( ppem == SNAPPING_STEM_TRANSLATING_Rules[i].ppem[0] || + SNAPPING_STEM_TRANSLATING_Rules[i].ppem[0] == 0 ) + { + known_stem_values->stem_translating + = SNAPPING_STEM_TRANSLATING_Rules[i].ppem[1]; + i = SNAPPING_STEM_TRANSLATING_RULES_SIZE; + } + } + i++; + } + + + i = 0; + while ( i < ALWAYS_USE_100_RULES_SIZE ) + { + if ( family && + ( strcasecmp( ALWAYS_USE_100_Rules[i].family, family ) == 0 ) ) + { + known_stem_values->use_100 = FALSE; /* default */ + + if ( ppem >= ALWAYS_USE_100_Rules[i].ppem[0] && + ppem <= ALWAYS_USE_100_Rules[i].ppem[1] ) + { + known_stem_values->use_100 = TRUE; + i = ALWAYS_USE_100_RULES_SIZE; + } + } + i++; + } + + + i = 0; + while ( i < SNAPPING_SYNTHESIZE_STEMS_RULES_SIZE ) + { + if ( family && + ( strcasecmp( SNAPPING_SYNTHESIZE_STEMS_Rules[i].family, + family ) == 0 ) ) + { + known_stem_values->synth_stems = FALSE; /* default */ + + if ( ppem >= SNAPPING_SYNTHESIZE_STEMS_Rules[i].ppem[0] && + ppem <= SNAPPING_SYNTHESIZE_STEMS_Rules[i].ppem[1] ) + { + known_stem_values->synth_stems = TRUE; + i = SNAPPING_SYNTHESIZE_STEMS_RULES_SIZE; + } + } + i++; + } + + + i = 0; + while ( i < SNAPPING_EDGE_DETECTION_RULES_SIZE ) + { + if ( family && + ( strcasecmp( SNAPPING_EDGE_DETECTION_Rules[i].family, + family ) == 0 ) ) + { + known_stem_values->edge_detection = FALSE; /* default */ + + if ( ppem >= SNAPPING_EDGE_DETECTION_Rules[i].ppem[0] && + ppem <= SNAPPING_EDGE_DETECTION_Rules[i].ppem[1] ) + { + known_stem_values->edge_detection = TRUE; + i = SNAPPING_EDGE_DETECTION_RULES_SIZE; + } + } + i++; + } + + + i = 0; + while ( i < SNAPPING_NO_BEARING_CORRECTION_RULES_SIZE ) + { + if ( family && + ( strcasecmp( SNAPPING_NO_BEARING_CORRECTION_Rules[i].family, + family ) == 0 ) ) + { + known_stem_values->bearing_correction = TRUE; /* default */ + + if ( ppem >= SNAPPING_NO_BEARING_CORRECTION_Rules[i].ppem[0] && + ppem <= SNAPPING_NO_BEARING_CORRECTION_Rules[i].ppem[1] ) + { + known_stem_values->bearing_correction = FALSE; + i = SNAPPING_NO_BEARING_CORRECTION_RULES_SIZE; + } + } + i++; + } + + +#if 0 + i = 0; + while ( i < AUTOHINT_BRIGHTNESS_RULES_SIZE ) + { + if ( family && + ( strcasecmp( BRIGHTNESS_Rules[i].family, family ) == 0 ) ) + { + known_stem_values->brightness = 0.0; + + if ( ppem == BRIGHTNESS_Rules[i].ppem[0] || + BRIGHTNESS_Rules[i].ppem[0] == 0 ) + { + known_stem_values->brightness = BRIGHTNESS_Rules[i].ppem[1]; + i = AUTOHINT_BRIGHTNESS_RULES_SIZE; + } + } + i++; + } + + i = 0; + while ( i < AUTOHINT_CONTRAST_RULES_SIZE ) + { + if ( family && + ( strcasecmp( CONTRAST_Rules[i].family, family ) == 0 ) ) + { + known_stem_values->contrast = 0.0; + + if ( ppem == CONTRAST_Rules[i].ppem[0] || + CONTRAST_Rules[i].ppem[0] == 0 ) + { + known_stem_values->contrast = CONTRAST_Rules[i].ppem[1]; + i = AUTOHINT_CONTRAST_RULES_SIZE; + } + } + i++; + } + + for ( i = 0; i <= STEM_SPACING_RULES_SIZE; i++ ) + { + if ( family && + ( strcasecmp( STEM_SPACING_Rules[i].family, family ) == 0 ) ) + { + j = 0; + known_stem_values->stem_spacing = 2; /* default */ + + while (j < 4) + { + if ( ppem < STEM_SPACING_Rules[i].ppem[j] ) + { + known_stem_values->stem_spacing = j; + j = 5; + } + j++; + } + } + } + + + for ( i = 0; i <= STEM_START_RULES_SIZE; i++ ) + { + if ( family && + ( strcasecmp( STEM_START_Rules[i].family, family ) == 0 ) ) + { + j = 0; + known_stem_values->stem_start = 1; /* default */ + + while (j < 4) + { + if ( ppem < STEM_START_Rules[i].ppem[j] ) + { + known_stem_values->stem_start = j; + j = 5; + } + j++; + } + } + } +#endif + } + + + FT_LOCAL_DEF( FT_Int ) + get_contrast ( FT_String* family, + int ppem ) + { + FT_Int i; + + + if ( verbose ) + printf( "%s ", family ); + + i = 0; + while ( i < AUTOHINT_CONTRAST_RULES_SIZE ) + { + if ( family && + ( strcasecmp( CONTRAST_Rules[i].family, family ) == 0 ) ) + { + if ( ppem == CONTRAST_Rules[i].ppem[0] || + CONTRAST_Rules[i].ppem[0] == 0 ) + return CONTRAST_Rules[i].ppem[1]; + } + i++; + } + return 0; + } + + + FT_LOCAL_DEF( FT_Int ) + get_brightness ( FT_String* family, + int ppem ) + { + FT_Int i; + + + if ( verbose ) + printf("%s ", family); + + i = 0; + while ( i < AUTOHINT_BRIGHTNESS_RULES_SIZE ) + { + if ( family && + ( strcasecmp( BRIGHTNESS_Rules[i].family, family ) == 0 ) ) + { + if ( ppem == BRIGHTNESS_Rules[i].ppem[0] || + BRIGHTNESS_Rules[i].ppem[0] == 0 ) + return BRIGHTNESS_Rules[i].ppem[1]; + } + i++; + } + return 0; + } + + + /* Stem alignment for bitmaps; A hack with very nice results */ + /* Ideally this could be implemented on the outline, prior to + * rasterization. Possible future enhancement is to use the + * warper code to achieve this */ + static void + _lcd_stem_align ( FT_Bitmap* bitmap, + FT_Render_Mode mode, + FT_GlyphSlot slot, + FT_Long* translate_value, + float* scale_value, + FT_UInt alignment_strength, + FT_UInt fitting_strength, + float* embolden_value + ) + { + FT_UInt width = (FT_UInt)bitmap->width; + FT_UInt height = (FT_UInt)bitmap->rows; + + Stem_Segment* segments; + Stem_Segment* leftmost_segment; + Stem_Segment* rightmost_segment; + Stem_Segment* leftmost_segment_not_extrema; + Stem_Segment* rightmost_segment_not_extrema; + Stem* stems; + Stem* possible_stems; + Stem* leftmost_stem; + Stem* rightmost_stem; + Stem_Data* known_stem_values; + Stem_Center* centers; + FT_Long leftmost_point = width * 256; + FT_Long rightmost_point = 0; + FT_Long leftmost_point_not_extrema = width * 256; + FT_Long rightmost_point_not_extrema = 0; + FT_Long num_segments = 0; + FT_Long num_centers = 0; + FT_Long stem_centers[width * 256]; + FT_UInt h; + FT_ULong valid_stems = 0, valid_possible_stems = 0; + FT_Long center, stem_matches, stem_matches_ledge; + FT_Long stem_matches_redge, next_center, last_matching_center; + FT_Long last_matching_ledge, last_matching_redge, this_center; + FT_Int max_strength; + FT_Byte* line = bitmap->buffer; + FT_UInt current_value = 0; + FT_UInt xx; + FT_Long linearHoriAdvance = slot->linearHoriAdvance >> 10; + + FT_Int m_horiBearingX = slot->metrics.horiBearingX; + FT_Int m_horiAdvance = slot->metrics.horiAdvance; + FT_Int m_width = slot->metrics.width; + FT_Pos one_pixel = 768; + FT_Pos one_third_pixel = 256; + FT_Int columns_per_pixel = 3; + /*FT_Int extra_columns = 6;*/ + + /* on / off flags for testing different features */ + FT_Bool strategy_translate_using_closest_stem = TRUE; + FT_Bool strategy_scale_to_closest_centers = FALSE; + FT_Bool strategy_scale_to_closest_centers_up_only = FALSE; + FT_Bool strategy_always_use_distance_ceiling = FALSE; + FT_Bool strategy_auto_change_center_offset = TRUE; + FT_Bool strategy_use_m_control = FALSE; + FT_Bool strategy_correct_out_of_bounds_outlines = FALSE; + FT_Bool strategy_also_use_edge_detection_for_stems = FALSE; + FT_Bool strategy_use_strengths = TRUE; + FT_Bool strategy_synthesize_stems = FALSE; + FT_Bool strategy_bearing_correction = TRUE; + FT_Bool strategy_use_d_correction = TRUE; + FT_Bool strategy_fit_to_width = FALSE; + /*FT_Bool strategy_center_glyph = FALSE;*/ + + FT_Bool has_serifs = FALSE; + FT_Bool autohinted = FALSE; + + const FT_Int MIN_PPEM = 7; + /*const FT_Int MAX_PPEM = 100;*/ + const FT_Int MAX_STEMS = 3; + FT_Int ppem = 0; + + FT_Bool checked_use_known_settings_on_selected_fonts_env = FALSE; + FT_Bool use_known_settings_on_selected_fonts = FALSE; + + FT_Pos cur_width = infinality_cur_width; + + + if ( cur_width ) + { + autohinted = TRUE; + } + + /* reset to default */ + *scale_value = 1.0; + + if ( !checked_use_known_settings_on_selected_fonts_env ) + { + char *use_known_settings_on_selected_fonts_env = + getenv( "INFINALITY_FT_USE_KNOWN_SETTINGS_ON_SELECTED_FONTS" ); + if ( use_known_settings_on_selected_fonts_env != NULL ) + { + if ( strcasecmp( use_known_settings_on_selected_fonts_env, + "default" ) != 0 ) + { + if ( strcasecmp( use_known_settings_on_selected_fonts_env, + "true") == 0 ) + use_known_settings_on_selected_fonts = TRUE; + else if ( strcasecmp( use_known_settings_on_selected_fonts_env, + "1") == 0 ) + use_known_settings_on_selected_fonts = TRUE; + else if ( strcasecmp( use_known_settings_on_selected_fonts_env, + "on") == 0 ) + use_known_settings_on_selected_fonts = TRUE; + else if ( strcasecmp( use_known_settings_on_selected_fonts_env, + "yes") == 0 ) + use_known_settings_on_selected_fonts = TRUE; + } + } + checked_use_known_settings_on_selected_fonts_env = TRUE; + } + + + /* Simply return in odd cases where these don't seem to be set */ + /* Flash and some pdf viewers will crash otherwise */ + if ( !slot->face || + !slot->face->size || + !slot->face->size->metrics.x_ppem ) + return; + + if ( slot->face->size->metrics.x_ppem > MAX_PPEM ) + return; + + if ( slot->face->size->metrics.x_ppem < MIN_PPEM ) + return; + + if ( !FT_IS_SCALABLE( slot->face ) ) + return; + + ppem = slot->face->size->metrics.x_ppem; + + + /* only perform alignment on styles we know, that aren't bold or italic */ + /* perhaps detection could be added on those that are not set? */ + /* Require certain ppems for narrow and light fonts */ + if( slot->face->style_name ) + { + if ( strcasestr( slot->face->style_name, "Italic" ) || + strcasestr( slot->face->style_name, "Oblique" ) || + strcasestr( slot->face->style_name, "Script" ) || + strcasestr( slot->face->style_name, "Handwriting" ) || + strcasestr( slot->face->style_name, "Bold" ) || + strcasestr( slot->face->style_name, "Black" ) || + ( ( strcasestr( slot->face->style_name, "Extra Thin" ) || + strcasestr( slot->face->style_name, "Extra Light" ) ) && + ppem < 10 ) || + ( strcasestr( slot->face->style_name, "Thin" ) + && ppem < 10 ) || + ( strcasestr( slot->face->style_name, "Light" ) + && ppem < 10 ) || + ( strcasestr( slot->face->style_name, "Narrow" ) + && ppem < 15 ) || + ( strcasestr( slot->face->style_name, "Condensed" ) + && ppem < 20 ) ) + return; + } + + if( slot->face->family_name ) + { + if ( strcasestr( slot->face->family_name, "Italic" ) || + strcasestr( slot->face->family_name, "Oblique" ) || + strcasestr( slot->face->family_name, "Script" ) || + strcasestr( slot->face->family_name, "Handwriting" ) || + strcasestr( slot->face->family_name, "Bold" ) || + strcasestr( slot->face->family_name, "Black" ) || + ( ( strcasestr( slot->face->family_name, "Extra Thin" ) || + strcasestr( slot->face->family_name, "Extra Light" ) ) && + ppem < 10 ) || + ( strcasestr( slot->face->family_name, "Thin" ) + && ppem < 10 ) || + ( strcasestr( slot->face->family_name, "Light" ) + && ppem < 10 ) || + ( strcasestr( slot->face->family_name, "Narrow" ) + && ppem < 15 ) || + ( strcasestr( slot->face->family_name, "Condensed" ) + && ppem < 20 ) ) + return; + } + else if ( slot->face->style_flags ) + { + if ( slot->face->style_flags & FT_STYLE_FLAG_ITALIC || + slot->face->style_flags & FT_STYLE_FLAG_BOLD || + FT_IS_TRICKY( slot->face ) ) + return; + } + else return; + + if ( slot->face->family_name ) + { + if ( strcasestr(slot->face->family_name, "Courier" ) || + strcasestr(slot->face->family_name, "Serif" ) || + strcasestr(slot->face->family_name, "Times" ) ) + has_serifs = TRUE; + } + + if ( mode != FT_RENDER_MODE_LCD ) + { + columns_per_pixel = 1; + one_pixel = 256; + one_third_pixel = 85; + /*extra_columns = 0;*/ + /* until this can be figured out just return */ + /* There are issues with missing glyphs */ + return; + } + /* only look at top 3 for now */ + known_stem_values + = (Stem_Data*) malloc ( columns_per_pixel * sizeof ( Stem_Data ) ); + known_stem_values->stem_spacing = -1; + known_stem_values->stem_width = -1; + known_stem_values->stem_start = -1; + known_stem_values->stem_scaling = -1; + known_stem_values->stem_translating_only = -1024; + known_stem_values->stem_translating = 0; + known_stem_values->brightness = 0; + known_stem_values->contrast = 0; + known_stem_values->use_100 = FALSE; + known_stem_values->m = -1; + known_stem_values->synth_stems = FALSE; + known_stem_values->bearing_correction = TRUE; + + if ( use_known_settings_on_selected_fonts ) + { + sa_fill_known_stem_values ( slot->face->family_name, + ppem, slot->face->style_name, + valid_stems, known_stem_values ); + if ( verbose ) + printf ( "width:%d,spacing:%d,start:%d,scaling:%d,translate:%d ", + known_stem_values->stem_width, + known_stem_values->stem_spacing, + known_stem_values->stem_start, + known_stem_values->stem_scaling, + known_stem_values->stem_translating_only ); + } + + /* translate value may be set for < 10 */ + if ( use_known_settings_on_selected_fonts && + known_stem_values->stem_translating_only > -1024 ) + { + *translate_value = known_stem_values->stem_translating_only; + free ( known_stem_values ); + return; + } + + if ( use_known_settings_on_selected_fonts && + known_stem_values->bearing_correction == FALSE ) + strategy_bearing_correction = FALSE; + + + if ( known_stem_values->use_100 || + known_stem_values->m >= 0 ) + { + alignment_strength = fitting_strength = 100; + strategy_use_m_control = TRUE; + } + + if ( known_stem_values->edge_detection ) + strategy_also_use_edge_detection_for_stems = TRUE; + + if ( ppem < 9 ) + return; + if ( ppem > 20 ) + strategy_use_m_control = TRUE; + + /* Allocate */ + segments + = (Stem_Segment*) malloc( (1) * sizeof ( Stem_Segment ) ); + leftmost_segment + = (Stem_Segment*) malloc( sizeof ( Stem_Segment ) ); + leftmost_segment_not_extrema + = (Stem_Segment*) malloc( sizeof ( Stem_Segment ) ); + rightmost_segment + = (Stem_Segment*) malloc( sizeof ( Stem_Segment ) ); + rightmost_segment_not_extrema + = (Stem_Segment*) malloc( sizeof ( Stem_Segment ) ); + + stems = (Stem*) malloc ( MAX_STEMS * sizeof ( Stem ) ); + possible_stems = (Stem*) malloc ( MAX_STEMS * sizeof ( Stem ) ); + leftmost_stem = (Stem*) malloc ( sizeof (Stem)); + rightmost_stem = (Stem*) malloc ( sizeof(Stem)); + centers = (Stem_Center*) malloc ( (1) * sizeof ( Stem_Center ) ); + + if ( verbose ) + printf("\n"); + + /* Initialize */ + for ( xx = 0; xx < width * 256; xx += 1 ) + stem_centers[xx] = 0; + + for ( xx = 0; xx < num_segments; xx += 1 ) + { + segments[xx].x1 = 0; + segments[xx].x2 = 0; + segments[xx].y = 0; + } + + rightmost_segment->x1 = 0; + rightmost_segment->x2 = 0; + rightmost_segment->y = 0; + leftmost_segment->x1 = 99999999; + leftmost_segment->x2 = 0; + leftmost_segment->y = 0; + + rightmost_segment_not_extrema->x1 = 0; + rightmost_segment_not_extrema->x2 = 0; + rightmost_segment_not_extrema->y = 0; + leftmost_segment_not_extrema->x1 = 99999999; + leftmost_segment_not_extrema->x2 = 0; + leftmost_segment_not_extrema->y = 0; + + /* Locate stem centers for later processing */ + for ( h = (FT_UInt)bitmap->rows; h > 0; h--, line += bitmap->pitch ) + { + current_value = 0; + /* Calculate various sums and stem widths of glyph */ + for ( xx = 0; xx < width; xx += 1 ) + { + /* Reallocate */ + segments = (Stem_Segment*) realloc + ( segments, ( num_segments + 1 ) * sizeof ( Stem_Segment ) ); + + /* if line is white, and now has color, it's the start of a stem */ + if ( current_value == 0 && line[xx] > 0 ) + { + /* start of stem */ + segments[num_segments].x1 = 256 * xx + ( 255 - line[xx] ); + segments[num_segments].y = h; + } + + /* otherwise, if it's currently black and the new value is 0, + it's the end of a stem */ + else if ( ( current_value > 0 && line[xx] == 0 ) || + ( current_value > 0 && xx == width - 1 ) ) + { + FT_Long stem_center_x; + segments[num_segments].x2 = 256 * ( xx - 1 ) + line[xx-1]; + + if ( xx == width - 1 ) + segments[num_segments].x2 += line[xx]; + + /*stem center is average of start and end of stem */ + stem_center_x = ( segments[num_segments].x2 + + segments[num_segments].x1 ) / 2; + + /* Reallocate */ + centers = (Stem_Center*) realloc + ( centers, ( num_centers + 1 ) * sizeof ( Stem_Center ) ); + centers[num_centers].x = stem_center_x; + centers[num_centers].y = h; + centers[num_centers].x1 = segments[num_segments].x1; + centers[num_centers].x2 = segments[num_segments].x2; + + num_centers++; + + stem_centers[stem_center_x] += 1; + + /* Find left and rightmost points for later calculations */ + /* OR - Favor ones that aren't on the top or bottom if */ + /* possible to prevent v and w from getting caught later */ + if ( segments[num_segments].x1 < leftmost_segment->x1 || + ( segments[num_segments].y > 1 && + segments[num_segments].y < height && + segments[num_segments].x1 == leftmost_segment->x1 ) ) + { + leftmost_segment->x1 = segments[num_segments].x1; + leftmost_segment->x2 = segments[num_segments].x2; + leftmost_segment->y = h; + } + if ( segments[num_segments].x2 > rightmost_segment->x2 || + ( segments[num_segments].y > 1 && + segments[num_segments].y < height && + segments[num_segments].x1 == rightmost_segment->x1 ) ) + { + rightmost_segment->x1 = segments[num_segments].x1; + rightmost_segment->x2 = segments[num_segments].x2; + rightmost_segment->y = h; + } + + if ( segments[num_segments].x1 + < leftmost_segment_not_extrema->x1 || + ( segments[num_segments].y > 1 && + segments[num_segments].y < height && + segments[num_segments].x1 + == leftmost_segment_not_extrema->x1 && + h < (FT_UInt)bitmap->rows && h > 0 ) ) + { + leftmost_segment_not_extrema->x1 = segments[num_segments].x1; + leftmost_segment_not_extrema->x2 = segments[num_segments].x2; + leftmost_segment_not_extrema->y = h; + } + if ( segments[num_segments].x2 + > rightmost_segment_not_extrema->x2 || + ( segments[num_segments].y > 1 && + segments[num_segments].y < height && + segments[num_segments].x1 + == rightmost_segment_not_extrema->x1 && + h < (FT_UInt)bitmap->rows && h > 0 ) ) + { + rightmost_segment_not_extrema->x1 = segments[num_segments].x1; + rightmost_segment_not_extrema->x2 = segments[num_segments].x2; + rightmost_segment_not_extrema->y = h; + } + + if ( segments[num_segments].x1 < leftmost_point ) + leftmost_point = segments[num_segments].x1; + + if ( segments[num_segments].x2 > rightmost_point ) + rightmost_point = segments[num_segments].x2; + + if ( segments[num_segments].x1 < leftmost_point_not_extrema && + h < (FT_UInt)bitmap->rows && h > 0 ) + leftmost_point_not_extrema = segments[num_segments].x1; + + if ( segments[num_segments].x2 > rightmost_point_not_extrema && + h < (FT_UInt)bitmap->rows && h > 0 ) + rightmost_point_not_extrema = segments[num_segments].x2; + + num_segments++; + } + /* else - other conditions - need some error checking here */ + current_value = line[xx]; + } + } + + /* initialize */ + for ( xx = 0; xx < MAX_STEMS; xx +=1 ) + { + stems[xx].center = 0; + stems[xx].count = 0; + stems[xx].width = 0; + stems[xx].height = 0; + possible_stems[xx].center = 0; + possible_stems[xx].count = 0; + possible_stems[xx].width = 0; + possible_stems[xx].height = 0; + } + + valid_stems = 0; + valid_possible_stems = 0; + + /* Determine which centers belong to stems */ + center = 0; + + while ( center < num_centers ) + { + /* slope at within which to consider a point part of a stem */ + /*const FT_UInt slope = 1; + const FT_UInt topslope = (256 * 3) / 10; */ + + /* 10 to 20 with 4 matches seems good, */ + /* but 1 or 2 with 3 stems needs to somehow get included */ + FT_Int deviation1 = 5; + FT_Int deviation2=-1, requirement1 = 4, stem_match_requirement = 3; + FT_Int best_height = 0, center_difference_in_height; + FT_Int center_difference_in_width, valid_center_average; + FT_Int smallest_width_ledge, smallest_width_redge; + FT_Int x1_difference_in_width, x2_difference_in_width; + FT_Bool large_gap_found = FALSE, no_gap_found = FALSE; + FT_Bool large_gap_found_ledge = FALSE, no_gap_found_ledge = FALSE; + FT_Bool large_gap_found_redge = FALSE, no_gap_found_redge = FALSE; + FT_Bool stem_detected = FALSE; + FT_Int set_width_to, set_center_to; + + /* seems to not do damage */ + /* May not be effective */ + requirement1 = height / 4; + if ( requirement1 < 5 ) + requirement1 = 5; + deviation1 = 20; + deviation2 = 20; + + if ( columns_per_pixel == 1 ) + deviation1 = deviation2 = 10; + + if ( (FT_Int)bitmap->rows <= 6 ) + deviation1 = 25; + + if ( (FT_Int)bitmap->rows <= 6 ) + deviation2 = 25; + + if ( columns_per_pixel == 1 && + (FT_Int)bitmap->rows <= 6 ) + deviation1 = deviation2 = 12; + + valid_center_average = 0; + + large_gap_found = large_gap_found_ledge = large_gap_found_redge = FALSE; + no_gap_found = no_gap_found_ledge = no_gap_found_redge = FALSE; + stem_detected = FALSE; + + if ( ppem < 11 ) + requirement1 = 4; + + if ( ppem > 18 ) + { + stem_match_requirement = height / 4; + if ( stem_match_requirement < 3 ) + stem_match_requirement = 3; + } + + smallest_width_ledge = smallest_width_redge = width * 256; + stem_matches = 0; + stem_matches_ledge = 0; + stem_matches_redge = 0; + last_matching_center = -1; + last_matching_ledge = -1; + last_matching_redge = -1; + + /* set currently looked at center to center value */ + this_center = center; + next_center = 0; + + /* For each center, compare with all other centers to see if others */ + /* match the properties of this one */ + while ( next_center < num_centers ) + { + + /* calculate differences */ + center_difference_in_width = abs ( centers[this_center].x + - centers[next_center].x ); + center_difference_in_height = abs ( centers[this_center].y + - centers[next_center].y ); + x1_difference_in_width = abs ( centers[this_center].x1 + - centers[next_center].x1 ); + x2_difference_in_width = abs ( centers[this_center].x2 + - centers[next_center].x2 ); + + + /* property - stem center points that align */ + /* if the center is within range, the center is less than */ + /* 1/2 the height away, and at least one edge is also within range */ + if ( center_difference_in_width + < center_difference_in_height * deviation1 && + center_difference_in_height + <= (FT_Int)bitmap->rows / 2 && + /* prevents w from getting caught ---- but also kills m */ + ( x1_difference_in_width + < center_difference_in_height * deviation2 || + x2_difference_in_width + < center_difference_in_height * deviation2 ) ) + { + stem_matches += 1; + valid_center_average += centers[next_center].x; + + /* try to find where the matching centers are far apart */ + if ( last_matching_center >= 0 && + abs( centers[last_matching_center].y + - centers[next_center].y ) >= (FT_Int)bitmap->rows / 2 ) + large_gap_found = TRUE; + + /* try to find where matching centers are next to each other */ + if ( last_matching_center >= 0 && + abs( centers[last_matching_center].y + - centers[next_center].y ) == 1 ) + no_gap_found = TRUE; + + last_matching_center = next_center; + } + + if ( strategy_also_use_edge_detection_for_stems ) + { + /* property - stem left edge points that align */ + /* if the center is within range, */ + /* the center is less than 1/2 the height away */ + if ( x1_difference_in_width + < center_difference_in_height * deviation1 && + center_difference_in_height <= (FT_Int)bitmap->rows / 2 ) + { + stem_matches_ledge += 1; + /* may not need for edges */ + /*valid_center_average += centers[next_center].x; */ + + if ( centers[next_center].x2 - centers[next_center].x1 + < smallest_width_ledge ) + smallest_width_ledge = centers[next_center].x2 + - centers[next_center].x1; + + /* try to find where the matching centers are far apart */ + if ( last_matching_ledge >= 0 && + abs( centers[last_matching_ledge].y + - centers[next_center].y) + >= (FT_Int)bitmap->rows / 2 ) + large_gap_found_ledge = TRUE; + + /* try to find where matching centers are next to each other */ + if ( last_matching_ledge >= 0 && + abs( centers[last_matching_ledge].y + - centers[next_center].y ) == 1 ) + no_gap_found_ledge = TRUE; + last_matching_ledge = next_center; + } + } + + if ( strategy_also_use_edge_detection_for_stems ) + { + /* property - stem right edge points that align */ + /* if the center is within range, the center is less than 1/2 */ + /* the height away */ + if ( x2_difference_in_width + < center_difference_in_height * deviation1 && + center_difference_in_height + <= (FT_Int)bitmap->rows / 2 ) + { + stem_matches_redge += 1; + /* may not need for edges */ + /*valid_center_average += centers[next_center].x; */ + + if ( centers[next_center].x2 - centers[next_center].x1 + < smallest_width_redge ) + smallest_width_redge = centers[next_center].x2 + - centers[next_center].x1; + + /* try to find where the matching centers are far apart */ + if ( last_matching_redge >= 0 && + abs( centers[last_matching_redge].y + - centers[next_center].y ) >= (FT_Int)bitmap->rows / 2 ) + large_gap_found_redge = TRUE; + + /* try to find where matching centers are next to each other */ + if ( last_matching_redge >= 0 && + abs( centers[last_matching_redge].y + - centers[next_center].y ) == 1 ) + no_gap_found_redge = TRUE; + + last_matching_redge = next_center; + } + } + + next_center++; + } + + if ( stem_matches > 0 ) + valid_center_average /= stem_matches; + + best_height = stem_matches; + + + if ( ( stem_matches >= stem_match_requirement || + ( ( (FT_Int)bitmap->rows <= 6 || ppem < 11 ) && + stem_matches >= 2 && + abs ( valid_center_average + - centers[center].x) < deviation1 /2 ) || + /* try to catch tightly aligned stuff where the matching centers */ + /* are next to each other only */ + ( stem_matches == 2 && + abs( valid_center_average + - centers[center].x) <= deviation1 /2 && + no_gap_found && + ppem < 18 ) ) && + /* catches things like times 16 u but gets a lot of w's too */ + /* stem width is less than 1/3 of the bitmap width, */ + /* or bitmap_width is small */ + ( centers[center].x2 - centers[center].x1 + < (m_horiAdvance * 12) / 2 || + m_horiAdvance * 12 <= columns_per_pixel * one_pixel ) ) + { + stem_detected = TRUE; + set_width_to = centers[center].x2 - centers[center].x1; + best_height = stem_matches; + set_center_to = centers[center].x; + } + + /* see if edges found anything */ + if ( strategy_also_use_edge_detection_for_stems && !stem_detected ) + { + /* Require no gap for edges */ + /* stem width less than 1/3 bitmap width, or bitmap_width is small */ + /* The stem occurs on the left side of glyph only */ + if ( ( stem_matches_ledge >= stem_match_requirement && + no_gap_found_ledge ) && + ( centers[center].x2 - centers[center].x1 + < ( m_horiAdvance * 12 ) / 2 || + m_horiAdvance * 12 <= columns_per_pixel * one_pixel ) && + centers[center].x < ( m_horiAdvance * 12 ) / 2 ) + { + stem_detected = TRUE; + set_width_to = smallest_width_ledge; + best_height = stem_matches_ledge; + set_center_to = centers[center].x1 + set_width_to / 2; + stem_matches = stem_matches_ledge; + } + /* Require no gap for edges */ + /* stem width is less than 1/3 bitmap width, or bitmap_width is small */ + /* The stem occurs on the right side of glyph only */ + else if ( ( stem_matches_redge >= stem_match_requirement && + no_gap_found_redge ) && + ( centers[center].x2 - centers[center].x1 + < ( m_horiAdvance * 12 ) / 2 || + m_horiAdvance * 12 <= columns_per_pixel * one_pixel ) && + centers[center].x > (m_horiAdvance * 12) / 2 ) + { + stem_detected = TRUE; + set_width_to = smallest_width_redge; + best_height = stem_matches_redge; + set_center_to = centers[center].x2 - set_width_to / 2; + stem_matches = stem_matches_redge; + } + } + + + /*store and/or replace highest occurrences with 3 or more centers */ + /* because this matched, it will become the top dog regardless */ + if ( stem_detected ) + if ( stem_matches > possible_stems[0].height ) + { + /* if this is the first stem just go ahead */ + if ( valid_possible_stems == 0 ) + { + valid_possible_stems = 1; + possible_stems[0].center = set_center_to; + possible_stems[0].count = stem_matches; + possible_stems[0].width = set_width_to; + possible_stems[0].height = stem_matches; + } + + /* otherwise, if there is already a stem */ + else if ( valid_possible_stems == 1 ) + { + /* if stem is within range of existing one, replace existing one */ + + /* if the stem isn't within the range of this one swap it with */ + /* next one first */ + if ( abs ( set_center_to - possible_stems[0].center ) + >= one_pixel * 2 ) + { + swap_stem ( &possible_stems[0], &possible_stems[1] ); + valid_possible_stems = 2; + } + possible_stems[0].center = set_center_to; + possible_stems[0].count = stem_matches; + possible_stems[0].width = set_width_to; + possible_stems[0].height = stem_matches; + } + + /* otherwise if there are already 2 stems */ + else if ( valid_possible_stems >= 2 ) + { + /* if the stem is within the range of existing one, replace */ + /* existing one */ + if ( abs ( set_center_to - possible_stems[0].center ) + <= one_pixel * 2 ) + { + possible_stems[0].center = set_center_to; + possible_stems[0].count = stem_matches; + possible_stems[0].width = set_width_to; + possible_stems[0].height = stem_matches; + } + /* if the stem isn't within the range of this one */ + else + { + /* see if within range of next one and swap if so and proceed */ + /* overwriting it */ + if ( abs ( set_center_to - possible_stems[1].center ) + <= one_pixel * 2 ) + swap_stem ( &possible_stems[0], &possible_stems[1] ); + + /* otherwise see if in range of third one */ + else if ( abs ( set_center_to - possible_stems[2].center ) + <= one_pixel * 2 ) + swap_stem ( &possible_stems[0], &possible_stems[2] ); + + /* otherwise this is the new top dog, so demote everything */ + else + { + swap_stem ( &possible_stems[1], &possible_stems[2] ); + swap_stem ( &possible_stems[0], &possible_stems[1] ); + valid_possible_stems += 1; + } + possible_stems[0].center = set_center_to; + possible_stems[0].count = stem_matches; + possible_stems[0].width = set_width_to; + possible_stems[0].height = stem_matches; + } + } + } + + else if ( stem_matches > possible_stems[1].height && + set_center_to != 0 ) + { + + /* make sure it doesn't match the first stem */ + if ( abs ( set_center_to - possible_stems[0].center ) >= one_pixel * 2 ) + { + + /* if this is the second stem */ + if ( valid_possible_stems == 1 ) + valid_possible_stems = 2; + + /* otherwise if there is already a stem here */ + else if ( valid_possible_stems >= 2 ) + { + /* if it doesn't match the second stem, proceed to swap out */ + /* with the third. if it does, replace it */ + if ( abs ( set_center_to - possible_stems[1].center ) + >= one_pixel * 2 ) + { + swap_stem ( &possible_stems[1], &possible_stems[2] ); + valid_possible_stems +=1; + } + } + possible_stems[1].center = set_center_to; + possible_stems[1].count = stem_matches; + possible_stems[1].width = set_width_to; + possible_stems[1].height = stem_matches; + } + } + + else if ( stem_matches > possible_stems[2].height && + set_center_to != 0 ) + { + /* if it doesn't match the first or second one */ + if ( abs( set_center_to - possible_stems[0].center) >= one_pixel * 2 && + abs( set_center_to - possible_stems[1].center) >= one_pixel * 2 ) + { + if ( valid_possible_stems == 2 ) + valid_possible_stems += 1; + + possible_stems[2].center = set_center_to; + possible_stems[2].count = stem_matches; + possible_stems[2].width = set_width_to; + possible_stems[1].height = stem_matches; + } + } + + if ( valid_possible_stems > 3 ) + valid_possible_stems = 3; + + center++; + } + + /* promote to stem */ + if ( valid_possible_stems > 0 ) + { + stems[0].center = possible_stems[0].center; + stems[0].count = possible_stems[0].count; + stems[0].width = possible_stems[0].width; + stems[0].height = possible_stems[0].height; + stems[0].generated = FALSE; + valid_stems++; + } + + if ( valid_stems == 1 && + valid_possible_stems > 1 ) + { + stems[1].center = possible_stems[1].center; + stems[1].count = possible_stems[1].count; + stems[1].width = possible_stems[1].width; + stems[1].height = possible_stems[1].height; + stems[1].generated = FALSE; + valid_stems++; + } + + if ( valid_stems == 2 && + valid_possible_stems > 2 && + possible_stems[2].center != 0 ) + { + stems[2].center = possible_stems[2].center; + stems[2].count = possible_stems[2].count; + stems[2].width = possible_stems[2].width; + stems[2].height = possible_stems[2].height; + stems[2].generated = FALSE; + valid_stems++; + } + + /* sort stems in x direction */ + if ( valid_stems == 3 ) + { + if ( stems[0].center > stems[1].center ) + swap_stem ( &stems[0], &stems[1] ); + + if ( stems[0].center > stems[2].center ) + swap_stem ( &stems[1], &stems[2] ); + + if ( stems[1].center > stems[2].center ) + swap_stem ( &stems[1], &stems[2] ); + + if ( stems[0].center > stems[1].center ) + swap_stem ( &stems[0], &stems[1] ); + + /* only look at first and last stem for now */ + swap_stem ( &stems[1], &stems[2] ); + } + + /* synthesize stems - Works, but needs work */ + if ( ( strategy_synthesize_stems || + known_stem_values->synth_stems ) && + valid_stems == 0 && + ppem > 10 ) + { + /* if the leftmost segment's leftmost point is the same as the glyph's */ + /* leftmost point, and it is of reasonable width, and is not on the */ + /* top or bottom of the bitmap */ + if ( leftmost_segment_not_extrema->x1 + == leftmost_point_not_extrema && + abs ( leftmost_segment_not_extrema->x2 + - leftmost_segment_not_extrema->x1 ) + < ( rightmost_point_not_extrema + - leftmost_point_not_extrema ) / 3 && + leftmost_segment_not_extrema->y < height && + leftmost_segment_not_extrema->y > 1 ) + { + stems[valid_stems].center = ( leftmost_segment_not_extrema->x2 + + leftmost_segment_not_extrema->x1 ) / 2; + stems[valid_stems].width = leftmost_segment_not_extrema->x2 + - leftmost_segment_not_extrema->x1; + stems[valid_stems].generated = TRUE; + valid_stems += 1; + } + + + if ( rightmost_segment_not_extrema->x2 + == rightmost_point_not_extrema && + abs ( rightmost_segment_not_extrema->x2 + - rightmost_segment_not_extrema->x1 ) + < ( rightmost_point_not_extrema + - leftmost_point_not_extrema ) / 3 && + rightmost_segment_not_extrema->y < height && + rightmost_segment_not_extrema->y > 1 ) + { + stems[valid_stems].center = ( rightmost_segment_not_extrema->x2 + + rightmost_segment_not_extrema->x1 ) / 2; + stems[valid_stems].width = rightmost_segment_not_extrema->x2 + - rightmost_segment_not_extrema->x1; + stems[valid_stems].generated = TRUE; + valid_stems += 1; + } + + } + + /* sort stems in x direction */ + if ( valid_stems > 1 && stems[0].center > stems[1].center ) + swap_stem ( &stems[0], &stems[1] ); + + if ( valid_stems == 0 && known_stem_values->stem_translating != 0 ) + { + *translate_value += known_stem_values->stem_translating; + + if ( strategy_use_strengths ) + { + /* consider 1/2 pixel the max when strength is at 100%, + unless translate is already greater than that */ + FT_Int strength_cutoff = 32; + + + if ( abs ( *translate_value ) > strength_cutoff) + strength_cutoff = *translate_value; + + max_strength = ( strength_cutoff * alignment_strength ) / 100; + + if ( *translate_value < -max_strength ) + *translate_value = -max_strength; + else if ( *translate_value > max_strength ) + *translate_value = max_strength; + } + } + else + /* Start snapping */ + { + FT_Int center_offset; + FT_Int modulus; + FT_Int delta, delta2; + FT_Long stem_distance = 1, new_distance = 1; + FT_Int distance_floor, distance_ceiling; + FT_Int translate_value2 = 0; + FT_Int main_stem = 0; + FT_Int lbearing = m_horiBearingX * 12; + FT_Int bitmap_stem_location = stems[0].center; + FT_Int advance_stem_location = bitmap_stem_location + + lbearing - one_pixel; + FT_Int advance_width = m_horiAdvance * 12; + FT_Int original_advance_width = 12 * ( slot->linearHoriAdvance >> 10 ); + FT_Int glyph_width = rightmost_point - leftmost_point; + FT_Int stem_width = stems[0].width; + FT_Int advance_leftmost_location = leftmost_point + + lbearing - one_pixel; + FT_Int advance_rightmost_location = rightmost_point + + lbearing - one_pixel; + +#define proposed_transformed_point(point) \ + point * (float)(new_distance) / (float)(stem_distance) \ + + *translate_value * 12 - ( stems[main_stem].center * (float)(new_distance) \ + / (float)(stem_distance) - stems[main_stem].center) + +#define proposed_translated_point(point) point + *translate_value * 12 + + center_offset = one_pixel / 2; /* half pixel */ + modulus = one_pixel; /* whole pixel */ + + /* Determine center_offset via known values */ + if ( known_stem_values->stem_width >= 0 ) + { + if ( known_stem_values->stem_width % 2 == 0 ) + center_offset = 0; + else + center_offset = one_pixel / 2; + } + /* otherwise do intelligent guessing, if set */ + else if ( strategy_auto_change_center_offset && + ppem >= STEM_WIDTH_2_PPEM && + stems[0].width < one_pixel * 1.45 ) + center_offset = one_pixel / 2; + else if ( strategy_auto_change_center_offset && + ppem >= STEM_WIDTH_2_PPEM && + stems[0].width >= one_pixel * 1.45 && + stems[0].width < one_pixel * 2.6 ) + center_offset = 0; + else if ( strategy_auto_change_center_offset && + ppem >= STEM_WIDTH_2_PPEM && + stems[0].width >= one_pixel * 2.6 && + stems[0].width < one_pixel * 3.6 ) + center_offset = one_pixel / 2; + else if ( strategy_auto_change_center_offset && + ppem >= STEM_WIDTH_2_PPEM ) + center_offset = + ( one_pixel + * ( ( ( (int)( stems[0].width + one_pixel / 2 ) ) + / one_pixel ) % 2 ) ) / 2; + + /* Snap to closest translate and scale values by default */ + if ( valid_stems >= 1 ) + { + /* closest snapping point for stem 0 */ + delta = ( stems[0].center + center_offset ) % modulus; + + if ( delta < modulus / 2 ) + /* snap left */ + *translate_value = -delta / ( columns_per_pixel * 4 ); + else + /* snap right */ + *translate_value = ( modulus - delta ) / ( columns_per_pixel * 4 ); + } + + if ( strategy_use_d_correction ) + { + /* if the only stem is in the last 1/3 of glyph width, the advance */ + /* is 6 pixels, the ppem 11, and doing so doesn't violate bitmap , */ + /* boundaries force it to snap right */ + if ( valid_stems == 1 && + advance_stem_location > (advance_width * 2) / 3 && + advance_width == 6 * one_pixel && + rightmost_point + modulus - delta + <= ( width - (columns_per_pixel * 2) / 3) * 256 && + ppem == 11 ) + *translate_value = ( modulus - delta ) / ( columns_per_pixel * 4 ); + } + + if ( strategy_use_strengths ) + { + /* consider 1/2 pixel the max when strength is at 100%, + unless translate is already greater than that */ + FT_Int strength_cutoff = 32; + if ( abs ( *translate_value ) > strength_cutoff ) + strength_cutoff = *translate_value; + + max_strength = ( strength_cutoff * alignment_strength ) / 100; + + if ( *translate_value < -max_strength ) + *translate_value = -max_strength; + else if ( *translate_value > max_strength ) + *translate_value = max_strength; + } + + /* If 2 stems is detected, scale distance + between in order to land on pixels */ + if ( valid_stems >= 2 ) + { + stem_distance = abs ( stems[1].center - stems[0].center ); + + delta = stem_distance % modulus; + new_distance = stem_distance - delta; + + distance_floor = stem_distance - delta; + distance_ceiling = stem_distance + ( modulus - delta ); + + if ( delta < modulus / 2 ) + new_distance = distance_floor; + else + new_distance = distance_ceiling; + + if ( columns_per_pixel == 3 && + valid_stems == 3 && + strategy_use_m_control && + ( width - 2 * columns_per_pixel ) > 6 * columns_per_pixel && + ppem > 8 && + ( advance_stem_location - advance_leftmost_location ) + < stems[main_stem].width * 2 ) + { + /* Possibly use 2 only when compatible widths is on? */ + FT_Int mod_factor = 2; + + if ( verbose ) + printf ( "USING M CONTROL "); + + distance_floor = stem_distance + - stem_distance % ( modulus * mod_factor ) ; + distance_ceiling = distance_floor + modulus * mod_factor; + + new_distance = distance_ceiling; + + /* force certain ideal situations */ + /* these 2 are mostly safe to do */ + if ( distance_ceiling + + one_pixel * columns_per_pixel == advance_width && + stem_width < one_pixel * 1.25 ) + new_distance = distance_ceiling; + /* NEED TO FIGURE OUT A WAY TO DETERMINE WHETHER + THAT NUDGE IS UP OR DOWN */ + else if ( stem_distance + one_pixel * 2.6 >= advance_width && + stem_width < one_pixel * 1.25 ) + new_distance = distance_ceiling; + + if ( proposed_transformed_point ( leftmost_point ) + < one_third_pixel * 2 || + proposed_transformed_point ( rightmost_point ) + > ( width -2 ) * one_third_pixel ) + new_distance = distance_floor; + + /* NEED TO IGNORE SERIF Ms HERE */ + /* perhaps check bitmap boundaries instead??? */ + if ( strategy_bearing_correction && new_distance == distance_ceiling ) + { + /* Correct if bearings are made substantially worse + (more than 1/3 a pixel beyond advance) */ + if ( proposed_transformed_point( advance_rightmost_location ) + > advance_width + one_third_pixel && + proposed_transformed_point( advance_rightmost_location ) + > advance_rightmost_location && + -proposed_transformed_point( advance_leftmost_location ) + < advance_rightmost_location - advance_width ) + new_distance = distance_floor; + } + + if ( known_stem_values->m >= 0 ) + { + if ( known_stem_values->m == 0 ) + new_distance = distance_floor; + else + new_distance = distance_ceiling; + } + + if ( ( rightmost_point - leftmost_point) - + ( ( rightmost_point * *scale_value) + - ( leftmost_point * *scale_value ) ) >= one_pixel * 1.5 ) + { + *scale_value = 1.0; + *translate_value = 0; + goto Exit; + } + + } + else if ( columns_per_pixel == 1 && + valid_stems == 3 && + strategy_use_m_control && valid_stems == 3 && + width >= 6 * columns_per_pixel && + ppem > 8 && + ( advance_stem_location - advance_leftmost_location ) + < stems[main_stem].width * 2 ) + { + /* Possibly use 2 only when compatible widths is on? */ + FT_Int mod_factor = 2; + + if ( verbose ) + printf ("USING M CONTROL "); + distance_floor = stem_distance - stem_distance + % ( modulus * mod_factor) ; + distance_ceiling = distance_floor + modulus * mod_factor; + + new_distance = distance_ceiling; + + /* force certain ideal situations */ + /* these 2 are mostly safe to do */ + if ( distance_ceiling + + one_pixel * columns_per_pixel == advance_width && + stem_width < one_pixel * 1.25 ) + new_distance = distance_ceiling; + /* NEED TO FIGURE OUT A WAY TO DETERMINE WHETHER + THAT NUDGE IS UP OR DOWN */ + else if ( stem_distance + one_pixel * 2.6 >= advance_width && + stem_width < one_pixel * 1.25 ) + new_distance = distance_ceiling; + + if ( proposed_transformed_point( leftmost_point ) < 0 || + proposed_transformed_point( rightmost_point ) + > width * one_pixel - 2 * one_third_pixel ) + new_distance = distance_floor; + + /* NEED TO IGNORE SERIF Ms HERE */ + /* perhaps check bitmap boundaries instead??? */ + if ( strategy_bearing_correction && new_distance == distance_ceiling ) + { + /* Correct if bearings are made substantially worse + (more than 1/3 a pixel beyond advance) */ + if ( proposed_transformed_point( advance_rightmost_location ) + > advance_width + one_third_pixel && + proposed_transformed_point( advance_rightmost_location ) + > advance_rightmost_location && + -proposed_transformed_point( advance_leftmost_location ) + < advance_rightmost_location - advance_width ) + new_distance = distance_floor; + } + + if ( known_stem_values->m >= 0 ) + { + if ( known_stem_values->m == 0 ) + new_distance = distance_floor; + else + new_distance = distance_ceiling; + } + + + if ( ( rightmost_point - leftmost_point ) + - ( ( rightmost_point * *scale_value ) + - ( leftmost_point * *scale_value ) ) >= one_pixel * 1.5 ) + { + *scale_value = 1.0; + *translate_value = 0; + goto Exit; + } + + } + else + { + if ( strategy_fit_to_width ) + new_distance = advance_width - 3 * one_pixel; + else if ( known_stem_values->stem_scaling >= 0 ) + { + if ( known_stem_values->stem_scaling > 0 ) + new_distance = distance_ceiling; + else + new_distance = distance_floor; + + /* enforce advance width boundaries */ + /* TOO RESTRICTIVE ON SERIF FONTS */ + if ( proposed_transformed_point( advance_rightmost_location ) + >= advance_width || + proposed_transformed_point( advance_leftmost_location ) + <= 0 ) + new_distance = distance_floor; + + /* enforce literal bitmap boundaries if no translate room */ + if ( ( proposed_transformed_point(rightmost_point) >= width * 256 + || proposed_transformed_point(leftmost_point ) <= one_pixel ) + && new_distance + one_pixel * 3 > advance_width ) + new_distance = distance_floor; + + } + else if ( strategy_translate_using_closest_stem ) + { + /* closest snapping point for stem 1 */ + delta2 = ( stems[1].center + center_offset ) % modulus; + + if ( delta2 < modulus / 2 ) + /* snap left */ + translate_value2 = -delta2 / ( columns_per_pixel * 4 ); + else + /* snap right */ + translate_value2 = ( modulus - delta2 ) + / ( columns_per_pixel * 4 ); + + if ( abs ( translate_value2 ) < abs ( *translate_value ) ) + { + *translate_value = translate_value2; + main_stem = 1; + } + + } + else if ( strategy_scale_to_closest_centers ) + { + /* closest snapping point for stem 0 */ + delta = ( stems[0].center + center_offset ) % modulus; + delta2 = ( stems[1].center + center_offset ) % modulus; + + if ( delta < modulus / 2 ) + /* stretch left */ + new_distance = delta + stem_distance; + else + /* stretch right */ + new_distance = delta - modulus + stem_distance; + + if ( delta2 < modulus / 2 ) + new_distance -= delta2; /* stretch left */ + else + new_distance += modulus - delta2; /* stretch right */ + + } + else if ( strategy_scale_to_closest_centers_up_only ) + { + FT_Int net_change = 0; + + /* closest snapping point for stem 0 */ + delta = ( stems[0].center + center_offset ) % modulus; + delta2 = ( stems[1].center + center_offset ) % modulus; + + if ( delta < modulus / 2 ) + net_change = delta; /* stretch left */ + else + net_change = -( modulus - delta ); /* stretch right */ + + if ( delta2 < modulus / 2 ) + net_change -= delta2; /* stretch left */ + else + net_change += modulus - delta2; /* stretch right */ + + if ( net_change > 0 && + proposed_transformed_point( advance_rightmost_location ) + < advance_width && + proposed_transformed_point( advance_leftmost_location ) > 0 ) + new_distance = distance_ceiling; + } + + else if ( strategy_always_use_distance_ceiling ) + { + if ( proposed_transformed_point( advance_rightmost_location ) + < advance_width && + proposed_transformed_point( advance_leftmost_location ) > 0 ) + new_distance = distance_ceiling; + } + } + + if ( strategy_use_strengths ) + { + FT_Int strength_cutoff = center_offset; + + + delta2 = new_distance - stem_distance; + + if ( abs ( delta2 ) > strength_cutoff ) + strength_cutoff = delta2; + + max_strength = ( strength_cutoff * fitting_strength ) / 100; + + if ( delta2 < -max_strength ) + new_distance = stem_distance - max_strength; + else if ( delta2 > max_strength ) + new_distance = stem_distance + max_strength; + } + + *scale_value = (float)( new_distance ) / (float)( stem_distance ); + *translate_value = *translate_value + - ( (float)( stems[main_stem].center * (float)new_distance ) + / (float)stem_distance - stems[main_stem].center ) / 12; + + if ( valid_stems == 2 ) + *embolden_value = ( 64.0 / *scale_value - 64.0 ); + + if ( valid_stems == 3 ) + *embolden_value = ( 64.0 / *scale_value - 64.0 ) / 1.5; + } + + if ( verbose ) + printf ( "%lu stems:", valid_stems ); + + if ( valid_stems == 1 && verbose ) + printf ( "1 stem: bitmapwidth:%d glyphwidth:%f glyph_width:%f center:%f bearing:%f advance:%f lhadvance:%f stemwidth:%f %d %d", + (width - 6) / columns_per_pixel, + (float)m_width / 64.0, + (float)glyph_width / (float)one_pixel, + (float)( (float)advance_stem_location ) / (float)one_pixel, + (float)m_horiBearingX / 64.0, + (float)m_horiAdvance / 64.0, + (float)linearHoriAdvance / 64.0, + (float)stems[0].width / (float)one_pixel, + advance_width, original_advance_width ); + else if ( valid_stems >= 2 && verbose ) + printf ( "%lu stems: bitmapwidth:%d center1:%f center2:%f difference:%f bearing:%f advance:%f advstemloc:%f ", + valid_stems, + (width - 6) / columns_per_pixel, + ( (float)advance_stem_location ) / (float)one_pixel, + ( (float)advance_stem_location + + (float)abs ( stems[1].center + - stems[0].center) ) / (float)one_pixel, + ( (float)abs ( stems[1].center + - stems[0].center ) ) / (float)one_pixel, + (float)m_horiBearingX / 64.0, + (float)m_horiAdvance / 64.0, + (float)advance_stem_location / (float)one_pixel ); + + if ( strategy_bearing_correction ) + { + /* Correct if negative bearings are made substantially worse */ + /* (more than 1/3 a pixel) */ + if ( proposed_transformed_point( advance_rightmost_location ) + > advance_width && + proposed_transformed_point( advance_rightmost_location ) + > advance_rightmost_location && + -proposed_transformed_point( advance_leftmost_location ) + < advance_rightmost_location - advance_width && + *translate_value + > one_third_pixel / ( columns_per_pixel * 4 ) ) + { + *translate_value -=64 ; + if ( verbose ) + printf ( "TRANSLATING -64 " ); + } + } + goto Exit; + } + + Exit: + +#define transformed_point( point ) point * *scale_value + *translate_value * 12 + + if ( strategy_correct_out_of_bounds_outlines ) + { + /* Correct if outside bitmap */ + if ( transformed_point( rightmost_point ) + >= width * 256 - 2 * one_third_pixel && + transformed_point( leftmost_point ) + > one_pixel + 2 * one_third_pixel ) + *translate_value -=64 ; + else if ( transformed_point( leftmost_point ) + <= one_pixel / 2 && + transformed_point( rightmost_point ) + <= width * 256 - ( one_pixel + one_pixel / 2 ) ) + *translate_value += 64; + } + + STVALUES + + free ( segments ); + free ( leftmost_segment ); + free ( leftmost_segment_not_extrema ); + free ( rightmost_segment ); + free ( rightmost_segment_not_extrema ); + free ( known_stem_values ); + free ( stems ); + free ( possible_stems ); + free ( leftmost_stem ); + free ( rightmost_stem ); + free ( centers ); + } + + + /* Gamma correction */ + static void + _ft_lcd_gamma_correction_correction ( FT_Bitmap* bitmap, + FT_Render_Mode mode, + FT_GlyphSlot slot, + float gamma_correction_lt, + float gamma_correction_value ) + { + if ( gamma_correction_value != 1.0 ) + { + FT_UInt width = (FT_UInt)bitmap->width; + FT_UInt height = (FT_UInt)bitmap->rows; + FT_Byte* line = bitmap->buffer; + float ppem = (float)slot->face->size->metrics.x_ppem; + + + if ( !slot->face || !slot->face->size ) return; + + if ( ppem >= 5 ) + for ( height = (FT_UInt)bitmap->rows; + height > 0; + height--, line += bitmap->pitch ) + { + FT_UInt xx; + + + for ( xx = 0; xx < width; xx += 1 ) + { + /*normal*/ + /*line[xx] = pseudo_gamma ( line[xx], gamma_correction_value );*/ + + /* sloped */ + /*line[xx] = pseudo_gamma ( line[xx], gamma_correction_value - 5 + * (1-gamma_correction_value)/(gamma_correction_lt -5) + + ((1-gamma_correction_value)/(gamma_correction_lt -5)) * ppem );*/ + + /* 1/3-sloped */ + line[xx] = pseudo_gamma ( line[xx], gamma_correction_value - 5 + * ( ( 1 - gamma_correction_value ) + / ( 3 * ( gamma_correction_lt -5 ) ) ) + + ( ( 1 - gamma_correction_value ) + / ( 3 * ( gamma_correction_lt -5) ) ) * ppem ); + } + } + } + } + +#endif /* convert a slot's glyph image into a bitmap */ static FT_Error @@ -104,8 +3102,9 @@ { FT_Error error; FT_Outline* outline = NULL; + FT_Outline* outline_orig = NULL; FT_BBox cbox; - FT_Pos width, height, pitch; + FT_Pos width, height, pitch, ppem; #ifndef FT_CONFIG_OPTION_SUBPIXEL_RENDERING FT_Pos height_org, width_org; #endif @@ -123,6 +3122,479 @@ FT_Bool have_outline_shifted = FALSE; FT_Bool have_buffer = FALSE; +#ifdef FT_CONFIG_OPTION_INFINALITY_PATCHSET + FT_Matrix scaleMat; + FT_Long translate_value = 0; + float scale_value = 1.0; + FT_Int align_called = 0; + + + int chromeos_style_sharpening_strength = 0; + int checked_chromeos_style_sharpening_strength = 0; + int alignment_strength = 0; + int fitting_strength = 0; + FT_UInt checked_alignment_strength = 0; + FT_UInt checked_fitting_strength = 0; + FT_UInt checked_fringe_filter_strength = 0; + int fringe_filter_strength = 0; + FT_UInt checked_grayscale_filter_strength = 0; + int grayscale_filter_strength = 0; + + FT_UInt checked_autohint_horizontal_stem_darken_strength = 0; + int autohint_horizontal_stem_darken_strength = 0; + + FT_UInt checked_autohint_vertical_stem_darken_strength = 0; + int autohint_vertical_stem_darken_strength = 0; + + int windows_style_sharpening_strength = 0; + FT_UInt checked_windows_style_sharpening_strength = 0; + float gamma_correction_value = 1; + float gamma_correction_lt = 0; + FT_UInt checked_gamma_correction_value = 0; + + FT_Int brightness_value = 0.0; + FT_UInt checked_brightness_value = 0; + + FT_Int contrast_value = 0.0; + FT_UInt checked_contrast_value = 0; + + FT_Int snapping_sliding_scale_value = 0; + FT_UInt checked_snapping_sliding_scale_value = 0; + + FT_Int global_embolden_x_value = 0; + FT_UInt checked_global_embolden_x_value = 0; + + FT_Int global_embolden_y_value = 0; + FT_UInt checked_global_embolden_y_value = 0; + + FT_Int bold_embolden_x_value = 0; + FT_UInt checked_bold_embolden_x_value = 0; + + FT_Int bold_embolden_y_value = 0; + FT_UInt checked_bold_embolden_y_value = 0; + + FT_Byte chromeos_cutoff; + double chromeos_gamma_value; + + float embolden_value = 0.0; + FT_Bool autohinted = FALSE; + + FT_UInt autohint_minimum_stem_height = 0; + FT_UInt checked_autohint_minimum_stem_height = 0; + + int checked_use_various_tweaks_env = 0; + FT_Bool use_various_tweaks = FALSE; + + FT_Pos cur_width = infinality_cur_width; + + const FT_Int MIN_PPEM = 1; + /*const FT_Int MAX_PPEM = 100; */ + + int checked_use_known_settings_on_selected_fonts_env = 0; + FT_Bool use_known_settings_on_selected_fonts = FALSE; + + if ( slot->face && + slot->face->size && + slot->face->size->metrics.x_ppem ) + ppem = slot->face->size->metrics.x_ppem; + else + ppem = 0; + + if ( cur_width ) + { + autohinted = TRUE; + } + + if ( checked_use_known_settings_on_selected_fonts_env == 0 ) + { + char *use_known_settings_on_selected_fonts_env = + getenv( "INFINALITY_FT_USE_KNOWN_SETTINGS_ON_SELECTED_FONTS" ); + if ( use_known_settings_on_selected_fonts_env != NULL ) + { + if ( strcasecmp( use_known_settings_on_selected_fonts_env, + "default" ) != 0 ) + { + if ( strcasecmp( use_known_settings_on_selected_fonts_env, + "true" ) == 0 ) + use_known_settings_on_selected_fonts = TRUE; + else if ( strcasecmp( use_known_settings_on_selected_fonts_env, + "1" ) == 0 ) + use_known_settings_on_selected_fonts = TRUE; + else if ( strcasecmp( use_known_settings_on_selected_fonts_env, + "on" ) == 0 ) + use_known_settings_on_selected_fonts = TRUE; + else if ( strcasecmp( use_known_settings_on_selected_fonts_env, + "yes" ) == 0 ) + use_known_settings_on_selected_fonts = TRUE; + } + } + checked_use_known_settings_on_selected_fonts_env = 1; + } + + if ( checked_use_various_tweaks_env == 0 ) + { + char *use_various_tweaks_env + = getenv( "INFINALITY_FT_USE_VARIOUS_TWEAKS" ); + + if ( use_various_tweaks_env != NULL ) + { + if ( strcasecmp( use_various_tweaks_env, "default" ) != 0 ) + { + if ( strcasecmp( use_various_tweaks_env, "true") == 0) + use_various_tweaks = TRUE; + else if ( strcasecmp( use_various_tweaks_env, "1") == 0) + use_various_tweaks = TRUE; + else if ( strcasecmp( use_various_tweaks_env, "on") == 0) + use_various_tweaks = TRUE; + else if ( strcasecmp( use_various_tweaks_env, "yes") == 0) + use_various_tweaks = TRUE; + } + } + checked_use_various_tweaks_env = 1; + } + + if ( checked_autohint_minimum_stem_height == 0 ) + { + char *autohint_minimum_stem_height_env = + getenv( "INFINALITY_FT_AUTOHINT_MINIMUM_STEM_WIDTH" ); + + if ( autohint_minimum_stem_height_env != NULL ) + { + sscanf ( autohint_minimum_stem_height_env, "%u", + &autohint_minimum_stem_height ); + + if ( autohint_minimum_stem_height > 100 ) + autohint_minimum_stem_height = 100; + else if ( autohint_minimum_stem_height < 0 ) + autohint_minimum_stem_height = 0; + } + checked_autohint_minimum_stem_height = 1; + } + + if ( checked_snapping_sliding_scale_value == 0 ) + { + char *snapping_sliding_scale_env = + getenv ( "INFINALITY_FT_STEM_SNAPPING_SLIDING_SCALE" ); + + if ( snapping_sliding_scale_env != NULL ) + { + sscanf ( snapping_sliding_scale_env, "%d", + &snapping_sliding_scale_value ); + + if ( snapping_sliding_scale_value > MAX_PPEM ) + snapping_sliding_scale_value = 0; + else if ( snapping_sliding_scale_value < 0 ) + snapping_sliding_scale_value = 0; + + if (snapping_sliding_scale_value < 11 && + snapping_sliding_scale_value > 0 ) + snapping_sliding_scale_value = 11; + } + checked_snapping_sliding_scale_value = 1; + } + + if ( checked_alignment_strength == 0) + { + char *alignment_strength_env = + getenv ( "INFINALITY_FT_STEM_ALIGNMENT_STRENGTH" ); + + if ( alignment_strength_env != NULL ) + { + sscanf ( alignment_strength_env, "%d", &alignment_strength ); + + if ( alignment_strength > 100 ) + alignment_strength = 100; + else if ( alignment_strength < 0 ) + alignment_strength = 0; + } + + if ( alignment_strength > 100 ) + alignment_strength = 100; + checked_alignment_strength = 1; + + if ( snapping_sliding_scale_value != 0 ) + alignment_strength = sliding_scale + ( 10, snapping_sliding_scale_value, alignment_strength, 100, ppem ); + } + + if ( checked_fitting_strength == 0 ) + { + char *fitting_strength_env = + getenv( "INFINALITY_FT_STEM_FITTING_STRENGTH" ); + + if ( fitting_strength_env != NULL ) + { + sscanf ( fitting_strength_env, "%d", &fitting_strength ); + + if ( fitting_strength > 100 ) + fitting_strength = 100; + else if ( fitting_strength < 0 ) + fitting_strength = 0; + } + + if ( fitting_strength > 100 ) + fitting_strength = 100; + + checked_fitting_strength = 1; + + if ( snapping_sliding_scale_value != 0 ) + fitting_strength = sliding_scale + ( 10, snapping_sliding_scale_value, fitting_strength, 100, ppem ); + } + + if ( checked_chromeos_style_sharpening_strength == 0 ) + { + char *chromeos_style_sharpening_strength_env = + getenv( "INFINALITY_FT_CHROMEOS_STYLE_SHARPENING_STRENGTH" ); + if ( chromeos_style_sharpening_strength_env != NULL ) + { + sscanf ( chromeos_style_sharpening_strength_env, "%d", + &chromeos_style_sharpening_strength ); + + if ( chromeos_style_sharpening_strength > 100 ) + chromeos_style_sharpening_strength = 100; + else if ( chromeos_style_sharpening_strength < 0 ) + chromeos_style_sharpening_strength = 0; + } + + if ( ppem > 10 ) + chromeos_style_sharpening_strength = + ( chromeos_style_sharpening_strength * ppem ) / 10; + + if ( chromeos_style_sharpening_strength > 100 ) + chromeos_style_sharpening_strength = 100; + checked_chromeos_style_sharpening_strength = 1; + } + + + if ( checked_brightness_value == 0) + { + char *brightness_env = getenv( "INFINALITY_FT_BRIGHTNESS" ); + if ( brightness_env != NULL ) + { + sscanf ( brightness_env, "%d", &brightness_value ); + if (brightness_value > 100 ) + brightness_value = 100; + else if (brightness_value < -100 ) + brightness_value = 0; + } + checked_brightness_value = 1; + } + + if ( checked_contrast_value == 0) + { + char *contrast_env = getenv( "INFINALITY_FT_CONTRAST" ); + if ( contrast_env != NULL ) + { + sscanf ( contrast_env, "%d", &contrast_value ); + if (contrast_value > 100 ) + contrast_value = 100; + else if (contrast_value < -100 ) + contrast_value = 100; + } + checked_contrast_value = 1; + } + + if ( checked_windows_style_sharpening_strength == 0) + { + char *windows_style_sharpening_strength_env = + getenv( "INFINALITY_FT_WINDOWS_STYLE_SHARPENING_STRENGTH" ); + + if ( windows_style_sharpening_strength_env != NULL ) + { + sscanf ( windows_style_sharpening_strength_env, "%d", + &windows_style_sharpening_strength ); + + if ( windows_style_sharpening_strength > 100 ) + windows_style_sharpening_strength = 100; + else if ( windows_style_sharpening_strength < 0 ) + windows_style_sharpening_strength = 0; + } + /* Decrease effect slightly to have a more linear increase in sharpness */ + windows_style_sharpening_strength = + ( ( windows_style_sharpening_strength + * windows_style_sharpening_strength ) / 100 + + windows_style_sharpening_strength ) / 2; + checked_windows_style_sharpening_strength = 1; + } + + if ( checked_gamma_correction_value == 0 ) + { + char *gamma_correction_value_env = + getenv( "INFINALITY_FT_GAMMA_CORRECTION" ); + + if ( gamma_correction_value_env != NULL ) + { + float f1, f2; + + if ( strcasecmp( gamma_correction_value_env, "default" ) != 0 ) + { + sscanf ( gamma_correction_value_env, "%f %f", &f1, &f2 ); + gamma_correction_lt = f1; + gamma_correction_value = f2 / 100.0; + } + if ( gamma_correction_value < .01 ) gamma_correction_value = 1.0; + } + checked_gamma_correction_value = 1; + } + + /* set gamma value to 1 if out of range */ + if ( slot->face && + slot->face->size && + slot->face->size->metrics.x_ppem ) + { + if ( slot->face->size->metrics.x_ppem >= gamma_correction_lt ) + gamma_correction_value = 1; + } + else + gamma_correction_value = 1; + + + if ( checked_fringe_filter_strength == 0 ) + { + char *fringe_filter_strength_env = + getenv( "INFINALITY_FT_FRINGE_FILTER_STRENGTH" ); + if ( fringe_filter_strength_env != NULL ) + { + sscanf ( fringe_filter_strength_env, "%d", &fringe_filter_strength ); + + if ( fringe_filter_strength > 100 ) + fringe_filter_strength = 100; + else if ( fringe_filter_strength < 0 ) + fringe_filter_strength = 0; + } + checked_fringe_filter_strength = 1; + } + + + if ( checked_grayscale_filter_strength == 0) + { + char *grayscale_filter_strength_env = + getenv( "INFINALITY_FT_GRAYSCALE_FILTER_STRENGTH" ); + if ( grayscale_filter_strength_env != NULL ) + { + sscanf ( grayscale_filter_strength_env, "%d", + &grayscale_filter_strength ); + if ( grayscale_filter_strength > 100 ) grayscale_filter_strength = 100; + else if (grayscale_filter_strength < 0 ) grayscale_filter_strength = 0; + } + checked_grayscale_filter_strength = 1; + } + + + if ( checked_autohint_horizontal_stem_darken_strength == 0) + { + char *autohint_horizontal_stem_darken_strength_env = + getenv( "INFINALITY_FT_AUTOHINT_HORIZONTAL_STEM_DARKEN_STRENGTH" ); + if ( autohint_horizontal_stem_darken_strength_env != NULL ) + { + sscanf ( autohint_horizontal_stem_darken_strength_env, "%d", + &autohint_horizontal_stem_darken_strength ); + + if ( autohint_horizontal_stem_darken_strength > 100 ) + autohint_horizontal_stem_darken_strength = 100; + else if ( autohint_horizontal_stem_darken_strength < 0 ) + autohint_horizontal_stem_darken_strength = 0; + } + checked_autohint_horizontal_stem_darken_strength = 1; + } + + if ( checked_autohint_vertical_stem_darken_strength == 0) + { + char *autohint_vertical_stem_darken_strength_env = + getenv( "INFINALITY_FT_AUTOHINT_VERTICAL_STEM_DARKEN_STRENGTH" ); + if ( autohint_vertical_stem_darken_strength_env != NULL ) + { + sscanf ( autohint_vertical_stem_darken_strength_env, "%d", + &autohint_vertical_stem_darken_strength ); + + if ( autohint_vertical_stem_darken_strength > 100 ) + autohint_vertical_stem_darken_strength = 100; + else if ( autohint_horizontal_stem_darken_strength < 0 ) + autohint_vertical_stem_darken_strength = 0; + } + checked_autohint_vertical_stem_darken_strength = 1; + } + + if ( checked_global_embolden_x_value == 0) + { + char *global_embolden_x_env = + getenv ( "INFINALITY_FT_GLOBAL_EMBOLDEN_X_VALUE" ); + if ( global_embolden_x_env != NULL ) + { + sscanf ( global_embolden_x_env, "%d", &global_embolden_x_value ); + + if ( global_embolden_x_value > 128 ) + global_embolden_x_value = 128; + else if ( global_embolden_x_value < -128 ) + global_embolden_x_value = -128; + } + checked_global_embolden_x_value = 1; + } + + if ( checked_global_embolden_y_value == 0) + { + char *global_embolden_y_env = + getenv ( "INFINALITY_FT_GLOBAL_EMBOLDEN_Y_VALUE" ); + if ( global_embolden_y_env != NULL ) + { + sscanf ( global_embolden_y_env, "%d", &global_embolden_y_value ); + if ( global_embolden_y_value > 128 ) + global_embolden_y_value = 128; + else if ( global_embolden_y_value < -128 ) + global_embolden_y_value = -128; + } + checked_global_embolden_y_value = 1; + } + + + if ( checked_bold_embolden_x_value == 0) + { + char *bold_embolden_x_env = + getenv ( "INFINALITY_FT_BOLD_EMBOLDEN_X_VALUE" ); + + if ( bold_embolden_x_env != NULL ) + { + sscanf ( bold_embolden_x_env, "%d", &bold_embolden_x_value ); + if (bold_embolden_x_value > 128 ) + bold_embolden_x_value = 128; + else if (bold_embolden_x_value < -128 ) + bold_embolden_x_value = -128; + } + checked_bold_embolden_x_value = 1; + } + + if ( checked_bold_embolden_y_value == 0) + { + char *bold_embolden_y_env = getenv ( "INFINALITY_FT_BOLD_EMBOLDEN_Y_VALUE" ); + + if ( bold_embolden_y_env != NULL ) + { + sscanf ( bold_embolden_y_env, "%d", &bold_embolden_y_value ); + if (bold_embolden_y_value > 128 ) + bold_embolden_y_value = 128; + else if (bold_embolden_y_value < -128 ) + bold_embolden_y_value = -128; + } + checked_bold_embolden_y_value = 1; + } + + if( use_various_tweaks && + slot->face && + slot->face->style_name ) + { + /* needs to also check for artifical italics */ + if ( strcasestr(slot->face->style_name, "Italic" ) || + strcasestr(slot->face->style_name, "Oblique" ) ) + { + windows_style_sharpening_strength = 0; + chromeos_style_sharpening_strength = 0; + } + } + + /*if (fitting_strength == 100) scale_value = 1.1;*/ + +#endif /* check glyph image format */ if ( slot->format != render->glyph_format ) @@ -138,9 +3610,105 @@ goto Exit; } +#ifdef FT_CONFIG_OPTION_INFINALITY_PATCHSET +RERENDER: + if ( align_called == 1 ) + { + scaleMat.xx = FT_FixedFromFloat(scale_value); + scaleMat.xy = 0; + scaleMat.yx = 0; + scaleMat.yy = ( 1 << 16 ); + + FT_Outline_Copy(outline_orig, outline); + + if ( scale_value != 1.0 ) + FT_Outline_Transform( outline, &scaleMat ); + + FT_Outline_Translate( outline, translate_value, 0 ); + + FT_Outline_EmboldenXY( outline, embolden_value, 0 ); + } + else + { +#endif outline = &slot->outline; +#ifdef FT_CONFIG_OPTION_INFINALITY_PATCHSET + /* Need to get this PRIOR to embolden, otherwise bad things happen */ + FT_Outline_Get_CBox( outline, &cbox ); + + /* Various hacks that need to be turned into a new rule set */ + /*if ( !autohinted + && use_known_settings_on_selected_fonts + && mode == FT_RENDER_MODE_LCD + && slot->face->family_name + && slot->face->style_name + && ( strcasestr(slot->face->family_name, "Courier New" ) + && ( strcasestr(slot->face->style_name, "Regular" ) + || strcasestr(slot->face->style_name, "Italic" ) ) ) ) + FT_Outline_Embolden( outline, 24 );*/ + + if ( slot->face ) + { + if ( !autohinted && + use_known_settings_on_selected_fonts && + mode == FT_RENDER_MODE_LCD && + slot->face->family_name && + slot->face->style_name && + strcasestr( slot->face->family_name, "Times New Roman" ) && + strcasestr( slot->face->style_name, "Italic" ) ) + FT_Outline_EmboldenXY( outline, 12, 0 ); + + if ( use_known_settings_on_selected_fonts && + autohinted && + mode == FT_RENDER_MODE_LCD && + slot->face->family_name && + slot->face->style_name && + strcasestr(slot->face->family_name, "FreeSerif" ) && + strcasestr(slot->face->style_name, "Italic" ) ) + FT_Outline_EmboldenXY( outline, 8, 0 ); + + if ( global_embolden_x_value != 0 || global_embolden_y_value != 0 ) + FT_Outline_EmboldenXY( outline, + global_embolden_x_value, + global_embolden_y_value ); + + if ( ( bold_embolden_x_value != 0 || bold_embolden_y_value != 0 ) && + ( slot->face->style_name && + ( strcasestr(slot->face->style_name, "Bold" ) || + strcasestr(slot->face->style_name, "Black" ) || + ( slot->face->style_flags && + slot->face->style_flags & FT_STYLE_FLAG_BOLD ) ) ) ) + FT_Outline_EmboldenXY( outline, + bold_embolden_x_value, + bold_embolden_y_value ); + } + + FT_Outline_Copy( outline, outline_orig ); + } /* translate the outline to the new origin if needed */ + if ( align_called == 0 ) + { + FT_Pos enlarge_cbox = 0; + + /* enlarge for grayscale rendering */ + if ( mode == FT_RENDER_MODE_NORMAL ) + enlarge_cbox = 64; + + if ( origin ) + { + FT_Outline_Translate( outline, origin->x, origin->y ); + have_translated_origin = TRUE; + } + + /* compute the control box, and grid fit it */ + /*FT_Outline_Get_CBox( outline, &cbox );*/ + + cbox.xMin = FT_PIX_FLOOR( cbox.xMin - enlarge_cbox ); + cbox.yMin = FT_PIX_FLOOR( cbox.yMin ); + cbox.xMax = FT_PIX_CEIL( cbox.xMax + enlarge_cbox ); + cbox.yMax = FT_PIX_CEIL( cbox.yMax ); +#else if ( origin ) { FT_Outline_Translate( outline, origin->x, origin->y ); @@ -154,6 +3722,7 @@ cbox.yMin = FT_PIX_FLOOR( cbox.yMin ); cbox.xMax = FT_PIX_CEIL( cbox.xMax ); cbox.yMax = FT_PIX_CEIL( cbox.yMax ); +#endif width = (FT_ULong)( cbox.xMax - cbox.xMin ) >> 6; height = (FT_ULong)( cbox.yMax - cbox.yMin ) >> 6; @@ -208,6 +3777,9 @@ y_top += extra >> 1; } } +#endif +#ifdef FT_CONFIG_OPTION_INFINALITY_PATCHSET + } #endif @@ -228,8 +3800,15 @@ bitmap->pitch = pitch; /* translate outline to render it into the bitmap */ +#ifdef FT_CONFIG_OPTION_INFINALITY_PATCHSET + if ( align_called == 0 ) + { +#endif FT_Outline_Translate( outline, -x_shift, -y_shift ); have_outline_shifted = TRUE; +#ifdef FT_CONFIG_OPTION_INFINALITY_PATCHSET + } +#endif if ( FT_ALLOC( bitmap->buffer, (FT_ULong)pitch * height ) ) goto Exit; @@ -283,9 +3862,153 @@ if ( error ) goto Exit; +#ifdef FT_CONFIG_OPTION_INFINALITY_PATCHSET + if ( ppem <= MAX_PPEM && ppem >= MIN_PPEM ) + { + if ( align_called == 0 && cur_width / ppem < 10 && + ( alignment_strength > 0 || fitting_strength > 0 ) ) + _lcd_stem_align ( bitmap, + mode, + slot, + &translate_value, + &scale_value, + alignment_strength, + fitting_strength, + &embolden_value ); + + if ( align_called == 0 && + ( translate_value != 0 || scale_value != 1.0 ) ) + { + align_called = 1; + goto RERENDER; + } + + if ( mode == FT_RENDER_MODE_LCD ) + { + + if ( fringe_filter_strength > 0 /*&& autohinted*/ ) + _ft_lcd_fringe_filter( bitmap, + mode, + fringe_filter_strength, + slot->library ); + + /*if ( autohinted) + _ft_lcd_stem_end_filter( bitmap, mode, 100, slot->library );*/ + + if ( gamma_correction_lt > 0 && gamma_correction_value != 1.0 ) + _ft_lcd_gamma_correction_correction( bitmap, + mode, + slot, + gamma_correction_lt, + gamma_correction_value ); + + chromeos_cutoff = (FT_Byte)( 0.5 * 255.0 ) + * ( chromeos_style_sharpening_strength / 100.0 ); + chromeos_gamma_value = 1; + + if ( chromeos_style_sharpening_strength > 0 ) + _ft_lcd_chromeos_sharpen( bitmap, + mode, + chromeos_cutoff, + chromeos_gamma_value ); + + if ( ppem > 8 ) + if ( windows_style_sharpening_strength > 0 ) + _ft_lcd_windows_sharpen( bitmap, + mode, + windows_style_sharpening_strength, + slot->library ); + + if ( autohinted && + ( cur_width * 100 ) / 64 + > autohint_horizontal_stem_darken_strength && + autohint_horizontal_stem_darken_strength != 0 ) + autohint_horizontal_stem_darken_strength = ( cur_width * 100 ) / 64; + + if ( autohint_horizontal_stem_darken_strength > 100) + autohint_horizontal_stem_darken_strength = 100; + + /* only do on autohinted fonts */ + /* Necessary to do on some non-thin fonts, which is why it is outside */ + /* of the below conditional */ + if ( autohint_horizontal_stem_darken_strength > 0 && autohinted ) + _ft_lcd_darken_x ( bitmap, + mode, + autohint_horizontal_stem_darken_strength, + slot->library ); + + /* Enhance thin fonts */ + if ( autohinted ) + { + /* if forcibly set use that, otherwise make a good estimate */ + if ( slot->face && !_ft_bitmap_bc ( bitmap, + (float)get_brightness( slot->face->family_name, ppem ) / 300.0, + (float)get_contrast( slot->face->family_name, ppem ) / 300.0 ) ) + { + FT_Bool is_fixed_name = FALSE; + + if ( slot->face->family_name && + strcasestr(slot->face->family_name, "Mono" ) ) + is_fixed_name = TRUE; + + /* Darken vertical stems */ + _ft_lcd_darken_y ( bitmap, + mode, + autohint_vertical_stem_darken_strength, + slot->library ); + + /* Adjust brightness / contrast automatically based on stem width */ + if ( cur_width != 0 && cur_width < 30 ) + cur_width = 30; + + if ( cur_width >= 30 && cur_width <= 60 ) + { + float ppem_factor = sliding_scale ( 5, 11, 0.0, 1.0, ppem ); + float brightness_factor = sliding_scale ( 30, 52, -.3, 0.0, + cur_width ); + float contrast_factor = sliding_scale ( 30, 52, .45, 0.0, + cur_width ); + _ft_bitmap_bc ( bitmap, + ppem_factor * brightness_factor, + ppem_factor * contrast_factor ); + + /* Only cap variable width thin-stemmed fonts */ + if ( !FT_IS_FIXED_WIDTH( slot->face ) && !is_fixed_name ) + _ft_bitmap_cap ( bitmap, + ( cur_width * 150 ) / 64, + slot->library ); + } + } + } + + + if ( slot->library->lcd_filter_func ) + slot->library->lcd_filter_func( bitmap, mode, slot->library ); + + if ( grayscale_filter_strength > 0 ) + _ft_lcd_grayscale_filter( bitmap, + mode, + grayscale_filter_strength, + slot->library ); + + } + + /* Global values */ + if ( brightness_value != 0 || contrast_value != 0 ) + _ft_bitmap_bc ( bitmap, + (float)brightness_value / 300.0, + (float)contrast_value / 300.0); + + FT_Outline_Done( slot->library, outline_orig ); + } + else if ( mode == FT_RENDER_MODE_LCD && + slot->library->lcd_filter_func ) + slot->library->lcd_filter_func( bitmap, mode, slot->library ); +#else if ( slot->library->lcd_filter_func ) slot->library->lcd_filter_func( bitmap, mode, slot->library ); +#endif /* FT_CONFIG_OPTION_INFINALITY_PATCHSET */ #else /* !FT_CONFIG_OPTION_SUBPIXEL_RENDERING */ /* render outline into bitmap */ --- a/src/autofit/aflatin.h 2014-09-14 11:18:00.268465365 -0500 +++ b/src/autofit/aflatin.h 2014-09-14 11:23:45.223942422 -0500 @@ -62,6 +62,9 @@ #define AF_LATIN_MAX_WIDTHS 16 +#ifdef FT_CONFIG_OPTION_INFINALITY_PATCHSET + extern FT_Pos infinality_cur_width; +#endif enum {