Index: src/truetype/ttsubpix.c |
diff --git a/src/truetype/ttsubpix.c b/src/truetype/ttsubpix.c |
new file mode 100644 |
index 0000000000000000000000000000000000000000..28470ad655a4766e162d817e25d4ebbf61fbe9af |
--- /dev/null |
+++ b/src/truetype/ttsubpix.c |
@@ -0,0 +1,1011 @@ |
+/***************************************************************************/ |
+/* */ |
+/* ttsubpix.c */ |
+/* */ |
+/* TrueType Subpixel Hinting. */ |
+/* */ |
+/* Copyright 2010-2013 by */ |
+/* David Turner, Robert Wilhelm, and Werner Lemberg. */ |
+/* */ |
+/* This file is part of the FreeType project, and may only be used, */ |
+/* modified, and distributed under the terms of the FreeType project */ |
+/* license, LICENSE.TXT. By continuing to use, modify, or distribute */ |
+/* this file you indicate that you have read the license and */ |
+/* understand and accept it fully. */ |
+/* */ |
+/***************************************************************************/ |
+ |
+#include <ft2build.h> |
+#include FT_INTERNAL_DEBUG_H |
+#include FT_INTERNAL_CALC_H |
+#include FT_INTERNAL_STREAM_H |
+#include FT_INTERNAL_SFNT_H |
+#include FT_TRUETYPE_TAGS_H |
+#include FT_OUTLINE_H |
+#include FT_TRUETYPE_DRIVER_H |
+ |
+#include "ttsubpix.h" |
+ |
+ |
+#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING |
+ |
+ /*************************************************************************/ |
+ /* */ |
+ /* These rules affect how the TT Interpreter does hinting, with the */ |
+ /* goal of doing subpixel hinting by (in general) ignoring x moves. */ |
+ /* Some of these rules are fixes that go above and beyond the */ |
+ /* stated techniques in the MS whitepaper on Cleartype, due to */ |
+ /* artifacts in many glyphs. So, these rules make some glyphs render */ |
+ /* better than they do in the MS rasterizer. */ |
+ /* */ |
+ /* "" string or 0 int/char indicates to apply to all glyphs. */ |
+ /* "-" used as dummy placeholders, but any non-matching string works. */ |
+ /* */ |
+ /* Some of this could arguably be implemented in fontconfig, however: */ |
+ /* */ |
+ /* - Fontconfig can't set things on a glyph-by-glyph basis. */ |
+ /* - The tweaks that happen here are very low-level, from an average */ |
+ /* user's point of view and are best implemented in the hinter. */ |
+ /* */ |
+ /* The goal is to make the subpixel hinting techniques as generalized */ |
+ /* as possible across all fonts to prevent the need for extra rules such */ |
+ /* as these. */ |
+ /* */ |
+ /* The rule structure is designed so that entirely new rules can easily */ |
+ /* be added when a new compatibility feature is discovered. */ |
+ /* */ |
+ /* The rule structures could also use some enhancement to handle ranges. */ |
+ /* */ |
+ /* ****************** WORK IN PROGRESS ******************* */ |
+ /* */ |
+ |
+ /* These are `classes' of fonts that can be grouped together and used in */ |
+ /* rules below. A blank entry "" is required at the end of these! */ |
+#define FAMILY_CLASS_RULES_SIZE 7 |
+ |
+ static const SPH_Font_Class FAMILY_CLASS_Rules |
+ [FAMILY_CLASS_RULES_SIZE] = |
+ { |
+ { "MS Legacy Fonts", |
+ { "Aharoni", |
+ "Andale Mono", |
+ "Andalus", |
+ "Angsana New", |
+ "AngsanaUPC", |
+ "Arabic Transparent", |
+ "Arial Black", |
+ "Arial Narrow", |
+ "Arial Unicode MS", |
+ "Arial", |
+ "Batang", |
+ "Browallia New", |
+ "BrowalliaUPC", |
+ "Comic Sans MS", |
+ "Cordia New", |
+ "CordiaUPC", |
+ "Courier New", |
+ "DFKai-SB", |
+ "David Transparent", |
+ "David", |
+ "DilleniaUPC", |
+ "Estrangelo Edessa", |
+ "EucrosiaUPC", |
+ "FangSong_GB2312", |
+ "Fixed Miriam Transparent", |
+ "FrankRuehl", |
+ "Franklin Gothic Medium", |
+ "FreesiaUPC", |
+ "Garamond", |
+ "Gautami", |
+ "Georgia", |
+ "Gulim", |
+ "Impact", |
+ "IrisUPC", |
+ "JasmineUPC", |
+ "KaiTi_GB2312", |
+ "KodchiangUPC", |
+ "Latha", |
+ "Levenim MT", |
+ "LilyUPC", |
+ "Lucida Console", |
+ "Lucida Sans Unicode", |
+ "MS Gothic", |
+ "MS Mincho", |
+ "MV Boli", |
+ "Mangal", |
+ "Marlett", |
+ "Microsoft Sans Serif", |
+ "Mingliu", |
+ "Miriam Fixed", |
+ "Miriam Transparent", |
+ "Miriam", |
+ "Narkisim", |
+ "Palatino Linotype", |
+ "Raavi", |
+ "Rod Transparent", |
+ "Rod", |
+ "Shruti", |
+ "SimHei", |
+ "Simplified Arabic Fixed", |
+ "Simplified Arabic", |
+ "Simsun", |
+ "Sylfaen", |
+ "Symbol", |
+ "Tahoma", |
+ "Times New Roman", |
+ "Traditional Arabic", |
+ "Trebuchet MS", |
+ "Tunga", |
+ "Verdana", |
+ "Webdings", |
+ "Wingdings", |
+ "", |
+ }, |
+ }, |
+ { "Core MS Legacy Fonts", |
+ { "Arial Black", |
+ "Arial Narrow", |
+ "Arial Unicode MS", |
+ "Arial", |
+ "Comic Sans MS", |
+ "Courier New", |
+ "Garamond", |
+ "Georgia", |
+ "Impact", |
+ "Lucida Console", |
+ "Lucida Sans Unicode", |
+ "Microsoft Sans Serif", |
+ "Palatino Linotype", |
+ "Tahoma", |
+ "Times New Roman", |
+ "Trebuchet MS", |
+ "Verdana", |
+ "", |
+ }, |
+ }, |
+ { "Apple Legacy Fonts", |
+ { "Geneva", |
+ "Times", |
+ "Monaco", |
+ "Century", |
+ "Chalkboard", |
+ "Lobster", |
+ "Century Gothic", |
+ "Optima", |
+ "Lucida Grande", |
+ "Gill Sans", |
+ "Baskerville", |
+ "Helvetica", |
+ "Helvetica Neue", |
+ "", |
+ }, |
+ }, |
+ { "Legacy Sans Fonts", |
+ { "Andale Mono", |
+ "Arial Unicode MS", |
+ "Arial", |
+ "Century Gothic", |
+ "Comic Sans MS", |
+ "Franklin Gothic Medium", |
+ "Geneva", |
+ "Lucida Console", |
+ "Lucida Grande", |
+ "Lucida Sans Unicode", |
+ "Lucida Sans Typewriter", |
+ "Microsoft Sans Serif", |
+ "Monaco", |
+ "Tahoma", |
+ "Trebuchet MS", |
+ "Verdana", |
+ "", |
+ }, |
+ }, |
+ |
+ { "Misc Legacy Fonts", |
+ { "Dark Courier", "", }, }, |
+ { "Verdana Clones", |
+ { "DejaVu Sans", |
+ "Bitstream Vera Sans", "", }, }, |
+ { "Verdana and Clones", |
+ { "DejaVu Sans", |
+ "Bitstream Vera Sans", |
+ "Verdana", "", }, }, |
+ }; |
+ |
+ |
+ /* Define this to force natural (i.e. not bitmap-compatible) widths. */ |
+ /* The default leans strongly towards natural widths except for a few */ |
+ /* legacy fonts where a selective combination produces nicer results. */ |
+/* #define FORCE_NATURAL_WIDTHS */ |
+ |
+ |
+ /* Define `classes' of styles that can be grouped together and used in */ |
+ /* rules below. A blank entry "" is required at the end of these! */ |
+#define STYLE_CLASS_RULES_SIZE 5 |
+ |
+ const SPH_Font_Class STYLE_CLASS_Rules |
+ [STYLE_CLASS_RULES_SIZE] = |
+ { |
+ { "Regular Class", |
+ { "Regular", |
+ "Book", |
+ "Medium", |
+ "Roman", |
+ "Normal", |
+ "", |
+ }, |
+ }, |
+ { "Regular/Italic Class", |
+ { "Regular", |
+ "Book", |
+ "Medium", |
+ "Italic", |
+ "Oblique", |
+ "Roman", |
+ "Normal", |
+ "", |
+ }, |
+ }, |
+ { "Bold/BoldItalic Class", |
+ { "Bold", |
+ "Bold Italic", |
+ "Black", |
+ "", |
+ }, |
+ }, |
+ { "Bold/Italic/BoldItalic Class", |
+ { "Bold", |
+ "Bold Italic", |
+ "Black", |
+ "Italic", |
+ "Oblique", |
+ "", |
+ }, |
+ }, |
+ { "Regular/Bold Class", |
+ { "Regular", |
+ "Book", |
+ "Medium", |
+ "Normal", |
+ "Roman", |
+ "Bold", |
+ "Black", |
+ "", |
+ }, |
+ }, |
+ }; |
+ |
+ |
+ /* Force special legacy fixes for fonts. */ |
+#define COMPATIBILITY_MODE_RULES_SIZE 1 |
+ |
+ const SPH_TweakRule COMPATIBILITY_MODE_Rules |
+ [COMPATIBILITY_MODE_RULES_SIZE] = |
+ { |
+ { "-", 0, "", 0 }, |
+ }; |
+ |
+ |
+ /* Don't do subpixel (ignore_x_mode) hinting; do normal hinting. */ |
+#define PIXEL_HINTING_RULES_SIZE 2 |
+ |
+ const SPH_TweakRule PIXEL_HINTING_Rules |
+ [PIXEL_HINTING_RULES_SIZE] = |
+ { |
+ /* these characters are almost always safe */ |
+ { "Courier New", 12, "Italic", 'z' }, |
+ { "Courier New", 11, "Italic", 'z' }, |
+ }; |
+ |
+ |
+ /* Subpixel hinting ignores SHPIX rules on X. Force SHPIX for these. */ |
+#define DO_SHPIX_RULES_SIZE 1 |
+ |
+ const SPH_TweakRule DO_SHPIX_Rules |
+ [DO_SHPIX_RULES_SIZE] = |
+ { |
+ { "-", 0, "", 0 }, |
+ }; |
+ |
+ |
+ /* Skip Y moves that start with a point that is not on a Y pixel */ |
+ /* boundary and don't move that point to a Y pixel boundary. */ |
+#define SKIP_NONPIXEL_Y_MOVES_RULES_SIZE 4 |
+ |
+ const SPH_TweakRule SKIP_NONPIXEL_Y_MOVES_Rules |
+ [SKIP_NONPIXEL_Y_MOVES_RULES_SIZE] = |
+ { |
+ /* fix vwxyz thinness*/ |
+ { "Consolas", 0, "", 0 }, |
+ /* Fix thin middle stems */ |
+ { "Core MS Legacy Fonts", 0, "Regular", 0 }, |
+ /* Cyrillic small letter I */ |
+ { "Legacy Sans Fonts", 0, "", 0 }, |
+ /* Fix artifacts with some Regular & Bold */ |
+ { "Verdana Clones", 0, "", 0 }, |
+ }; |
+ |
+ |
+#define SKIP_NONPIXEL_Y_MOVES_RULES_EXCEPTIONS_SIZE 1 |
+ |
+ const SPH_TweakRule SKIP_NONPIXEL_Y_MOVES_Rules_Exceptions |
+ [SKIP_NONPIXEL_Y_MOVES_RULES_EXCEPTIONS_SIZE] = |
+ { |
+ /* Fixes < and > */ |
+ { "Courier New", 0, "Regular", 0 }, |
+ }; |
+ |
+ |
+ /* Skip Y moves that start with a point that is not on a Y pixel */ |
+ /* boundary and don't move that point to a Y pixel boundary. */ |
+#define SKIP_NONPIXEL_Y_MOVES_DELTAP_RULES_SIZE 2 |
+ |
+ const SPH_TweakRule SKIP_NONPIXEL_Y_MOVES_DELTAP_Rules |
+ [SKIP_NONPIXEL_Y_MOVES_DELTAP_RULES_SIZE] = |
+ { |
+ /* Maintain thickness of diagonal in 'N' */ |
+ { "Times New Roman", 0, "Regular/Bold Class", 'N' }, |
+ { "Georgia", 0, "Regular/Bold Class", 'N' }, |
+ }; |
+ |
+ |
+ /* Skip Y moves that move a point off a Y pixel boundary. */ |
+#define SKIP_OFFPIXEL_Y_MOVES_RULES_SIZE 1 |
+ |
+ const SPH_TweakRule SKIP_OFFPIXEL_Y_MOVES_Rules |
+ [SKIP_OFFPIXEL_Y_MOVES_RULES_SIZE] = |
+ { |
+ { "-", 0, "", 0 }, |
+ }; |
+ |
+ |
+#define SKIP_OFFPIXEL_Y_MOVES_RULES_EXCEPTIONS_SIZE 1 |
+ |
+ const SPH_TweakRule SKIP_OFFPIXEL_Y_MOVES_Rules_Exceptions |
+ [SKIP_OFFPIXEL_Y_MOVES_RULES_EXCEPTIONS_SIZE] = |
+ { |
+ { "-", 0, "", 0 }, |
+ }; |
+ |
+ |
+ /* Round moves that don't move a point to a Y pixel boundary. */ |
+#define ROUND_NONPIXEL_Y_MOVES_RULES_SIZE 2 |
+ |
+ const SPH_TweakRule ROUND_NONPIXEL_Y_MOVES_Rules |
+ [ROUND_NONPIXEL_Y_MOVES_RULES_SIZE] = |
+ { |
+ /* Droid font instructions don't snap Y to pixels */ |
+ { "Droid Sans", 0, "Regular/Italic Class", 0 }, |
+ { "Droid Sans Mono", 0, "", 0 }, |
+ }; |
+ |
+ |
+#define ROUND_NONPIXEL_Y_MOVES_RULES_EXCEPTIONS_SIZE 1 |
+ |
+ const SPH_TweakRule ROUND_NONPIXEL_Y_MOVES_Rules_Exceptions |
+ [ROUND_NONPIXEL_Y_MOVES_RULES_EXCEPTIONS_SIZE] = |
+ { |
+ { "-", 0, "", 0 }, |
+ }; |
+ |
+ |
+ /* Allow a Direct_Move along X freedom vector if matched. */ |
+#define ALLOW_X_DMOVE_RULES_SIZE 1 |
+ |
+ const SPH_TweakRule ALLOW_X_DMOVE_Rules |
+ [ALLOW_X_DMOVE_RULES_SIZE] = |
+ { |
+ /* Fixes vanishing diagonal in 4 */ |
+ { "Verdana", 0, "Regular", '4' }, |
+ }; |
+ |
+ |
+ /* Return MS rasterizer version 35 if matched. */ |
+#define RASTERIZER_35_RULES_SIZE 8 |
+ |
+ const SPH_TweakRule RASTERIZER_35_Rules |
+ [RASTERIZER_35_RULES_SIZE] = |
+ { |
+ /* This seems to be the only way to make these look good */ |
+ { "Times New Roman", 0, "Regular", 'i' }, |
+ { "Times New Roman", 0, "Regular", 'j' }, |
+ { "Times New Roman", 0, "Regular", 'm' }, |
+ { "Times New Roman", 0, "Regular", 'r' }, |
+ { "Times New Roman", 0, "Regular", 'a' }, |
+ { "Times New Roman", 0, "Regular", 'n' }, |
+ { "Times New Roman", 0, "Regular", 'p' }, |
+ { "Times", 0, "", 0 }, |
+ }; |
+ |
+ |
+ /* Don't round to the subpixel grid. Round to pixel grid. */ |
+#define NORMAL_ROUND_RULES_SIZE 1 |
+ |
+ const SPH_TweakRule NORMAL_ROUND_Rules |
+ [NORMAL_ROUND_RULES_SIZE] = |
+ { |
+ /* Fix serif thickness for certain ppems */ |
+ /* Can probably be generalized somehow */ |
+ { "Courier New", 0, "", 0 }, |
+ }; |
+ |
+ |
+ /* Skip IUP instructions if matched. */ |
+#define SKIP_IUP_RULES_SIZE 1 |
+ |
+ const SPH_TweakRule SKIP_IUP_Rules |
+ [SKIP_IUP_RULES_SIZE] = |
+ { |
+ { "Arial", 13, "Regular", 'a' }, |
+ }; |
+ |
+ |
+ /* Skip MIAP Twilight hack if matched. */ |
+#define MIAP_HACK_RULES_SIZE 1 |
+ |
+ const SPH_TweakRule MIAP_HACK_Rules |
+ [MIAP_HACK_RULES_SIZE] = |
+ { |
+ { "Geneva", 12, "", 0 }, |
+ }; |
+ |
+ |
+ /* Skip DELTAP instructions if matched. */ |
+#define ALWAYS_SKIP_DELTAP_RULES_SIZE 23 |
+ |
+ const SPH_TweakRule ALWAYS_SKIP_DELTAP_Rules |
+ [ALWAYS_SKIP_DELTAP_RULES_SIZE] = |
+ { |
+ { "Georgia", 0, "Regular", 'k' }, |
+ /* fix various problems with e in different versions */ |
+ { "Trebuchet MS", 14, "Regular", 'e' }, |
+ { "Trebuchet MS", 13, "Regular", 'e' }, |
+ { "Trebuchet MS", 15, "Regular", 'e' }, |
+ { "Trebuchet MS", 0, "Italic", 'v' }, |
+ { "Trebuchet MS", 0, "Italic", 'w' }, |
+ { "Trebuchet MS", 0, "Regular", 'Y' }, |
+ { "Arial", 11, "Regular", 's' }, |
+ /* prevent problems with '3' and others */ |
+ { "Verdana", 10, "Regular", 0 }, |
+ { "Verdana", 9, "Regular", 0 }, |
+ /* Cyrillic small letter short I */ |
+ { "Legacy Sans Fonts", 0, "", 0x438 }, |
+ { "Legacy Sans Fonts", 0, "", 0x439 }, |
+ { "Arial", 10, "Regular", '6' }, |
+ { "Arial", 0, "Bold/BoldItalic Class", 'a' }, |
+ /* Make horizontal stems consistent with the rest */ |
+ { "Arial", 24, "Bold", 'a' }, |
+ { "Arial", 25, "Bold", 'a' }, |
+ { "Arial", 24, "Bold", 's' }, |
+ { "Arial", 25, "Bold", 's' }, |
+ { "Arial", 34, "Bold", 's' }, |
+ { "Arial", 35, "Bold", 's' }, |
+ { "Arial", 36, "Bold", 's' }, |
+ { "Arial", 25, "Regular", 's' }, |
+ { "Arial", 26, "Regular", 's' }, |
+ }; |
+ |
+ |
+ /* Always do DELTAP instructions if matched. */ |
+#define ALWAYS_DO_DELTAP_RULES_SIZE 1 |
+ |
+ const SPH_TweakRule ALWAYS_DO_DELTAP_Rules |
+ [ALWAYS_DO_DELTAP_RULES_SIZE] = |
+ { |
+ { "-", 0, "", 0 }, |
+ }; |
+ |
+ |
+ /* Don't allow ALIGNRP after IUP. */ |
+#define NO_ALIGNRP_AFTER_IUP_RULES_SIZE 1 |
+ |
+ static const SPH_TweakRule NO_ALIGNRP_AFTER_IUP_Rules |
+ [NO_ALIGNRP_AFTER_IUP_RULES_SIZE] = |
+ { |
+ /* Prevent creation of dents in outline */ |
+ { "-", 0, "", 0 }, |
+ }; |
+ |
+ |
+ /* Don't allow DELTAP after IUP. */ |
+#define NO_DELTAP_AFTER_IUP_RULES_SIZE 1 |
+ |
+ static const SPH_TweakRule NO_DELTAP_AFTER_IUP_Rules |
+ [NO_DELTAP_AFTER_IUP_RULES_SIZE] = |
+ { |
+ { "-", 0, "", 0 }, |
+ }; |
+ |
+ |
+ /* Don't allow CALL after IUP. */ |
+#define NO_CALL_AFTER_IUP_RULES_SIZE 1 |
+ |
+ static const SPH_TweakRule NO_CALL_AFTER_IUP_Rules |
+ [NO_CALL_AFTER_IUP_RULES_SIZE] = |
+ { |
+ /* Prevent creation of dents in outline */ |
+ { "-", 0, "", 0 }, |
+ }; |
+ |
+ |
+ /* De-embolden these glyphs slightly. */ |
+#define DEEMBOLDEN_RULES_SIZE 9 |
+ |
+ static const SPH_TweakRule DEEMBOLDEN_Rules |
+ [DEEMBOLDEN_RULES_SIZE] = |
+ { |
+ { "Courier New", 0, "Bold", 'A' }, |
+ { "Courier New", 0, "Bold", 'W' }, |
+ { "Courier New", 0, "Bold", 'w' }, |
+ { "Courier New", 0, "Bold", 'M' }, |
+ { "Courier New", 0, "Bold", 'X' }, |
+ { "Courier New", 0, "Bold", 'K' }, |
+ { "Courier New", 0, "Bold", 'x' }, |
+ { "Courier New", 0, "Bold", 'z' }, |
+ { "Courier New", 0, "Bold", 'v' }, |
+ }; |
+ |
+ |
+ /* Embolden these glyphs slightly. */ |
+#define EMBOLDEN_RULES_SIZE 2 |
+ |
+ static const SPH_TweakRule EMBOLDEN_Rules |
+ [EMBOLDEN_RULES_SIZE] = |
+ { |
+ { "Courier New", 0, "Regular", 0 }, |
+ { "Courier New", 0, "Italic", 0 }, |
+ }; |
+ |
+ |
+ /* This is a CVT hack that makes thick horizontal stems on 2, 5, 7 */ |
+ /* similar to Windows XP. */ |
+#define TIMES_NEW_ROMAN_HACK_RULES_SIZE 12 |
+ |
+ static const SPH_TweakRule TIMES_NEW_ROMAN_HACK_Rules |
+ [TIMES_NEW_ROMAN_HACK_RULES_SIZE] = |
+ { |
+ { "Times New Roman", 16, "Italic", '2' }, |
+ { "Times New Roman", 16, "Italic", '5' }, |
+ { "Times New Roman", 16, "Italic", '7' }, |
+ { "Times New Roman", 16, "Regular", '2' }, |
+ { "Times New Roman", 16, "Regular", '5' }, |
+ { "Times New Roman", 16, "Regular", '7' }, |
+ { "Times New Roman", 17, "Italic", '2' }, |
+ { "Times New Roman", 17, "Italic", '5' }, |
+ { "Times New Roman", 17, "Italic", '7' }, |
+ { "Times New Roman", 17, "Regular", '2' }, |
+ { "Times New Roman", 17, "Regular", '5' }, |
+ { "Times New Roman", 17, "Regular", '7' }, |
+ }; |
+ |
+ |
+ /* This fudges distance on 2 to get rid of the vanishing stem issue. */ |
+ /* A real solution to this is certainly welcome. */ |
+#define COURIER_NEW_2_HACK_RULES_SIZE 15 |
+ |
+ static const SPH_TweakRule COURIER_NEW_2_HACK_Rules |
+ [COURIER_NEW_2_HACK_RULES_SIZE] = |
+ { |
+ { "Courier New", 10, "Regular", '2' }, |
+ { "Courier New", 11, "Regular", '2' }, |
+ { "Courier New", 12, "Regular", '2' }, |
+ { "Courier New", 13, "Regular", '2' }, |
+ { "Courier New", 14, "Regular", '2' }, |
+ { "Courier New", 15, "Regular", '2' }, |
+ { "Courier New", 16, "Regular", '2' }, |
+ { "Courier New", 17, "Regular", '2' }, |
+ { "Courier New", 18, "Regular", '2' }, |
+ { "Courier New", 19, "Regular", '2' }, |
+ { "Courier New", 20, "Regular", '2' }, |
+ { "Courier New", 21, "Regular", '2' }, |
+ { "Courier New", 22, "Regular", '2' }, |
+ { "Courier New", 23, "Regular", '2' }, |
+ { "Courier New", 24, "Regular", '2' }, |
+ }; |
+ |
+ |
+#ifndef FORCE_NATURAL_WIDTHS |
+ |
+ /* Use compatible widths with these glyphs. Compatible widths is always */ |
+ /* on when doing B/W TrueType instructing, but is used selectively here, */ |
+ /* typically on glyphs with 3 or more vertical stems. */ |
+#define COMPATIBLE_WIDTHS_RULES_SIZE 38 |
+ |
+ static const SPH_TweakRule COMPATIBLE_WIDTHS_Rules |
+ [COMPATIBLE_WIDTHS_RULES_SIZE] = |
+ { |
+ { "Arial Unicode MS", 12, "Regular Class", 'm' }, |
+ { "Arial Unicode MS", 14, "Regular Class", 'm' }, |
+ /* Cyrillic small letter sha */ |
+ { "Arial", 10, "Regular Class", 0x448 }, |
+ { "Arial", 11, "Regular Class", 'm' }, |
+ { "Arial", 12, "Regular Class", 'm' }, |
+ /* Cyrillic small letter sha */ |
+ { "Arial", 12, "Regular Class", 0x448 }, |
+ { "Arial", 13, "Regular Class", 0x448 }, |
+ { "Arial", 14, "Regular Class", 'm' }, |
+ /* Cyrillic small letter sha */ |
+ { "Arial", 14, "Regular Class", 0x448 }, |
+ { "Arial", 15, "Regular Class", 0x448 }, |
+ { "Arial", 17, "Regular Class", 'm' }, |
+ { "DejaVu Sans", 15, "Regular Class", 0 }, |
+ { "Microsoft Sans Serif", 11, "Regular Class", 0 }, |
+ { "Microsoft Sans Serif", 12, "Regular Class", 0 }, |
+ { "Segoe UI", 11, "Regular Class", 0 }, |
+ { "Monaco", 0, "Regular Class", 0 }, |
+ { "Segoe UI", 12, "Regular Class", 'm' }, |
+ { "Segoe UI", 14, "Regular Class", 'm' }, |
+ { "Tahoma", 11, "Regular Class", 0 }, |
+ { "Times New Roman", 16, "Regular Class", 'c' }, |
+ { "Times New Roman", 16, "Regular Class", 'm' }, |
+ { "Times New Roman", 16, "Regular Class", 'o' }, |
+ { "Times New Roman", 16, "Regular Class", 'w' }, |
+ { "Trebuchet MS", 11, "Regular Class", 0 }, |
+ { "Trebuchet MS", 12, "Regular Class", 0 }, |
+ { "Trebuchet MS", 14, "Regular Class", 0 }, |
+ { "Trebuchet MS", 15, "Regular Class", 0 }, |
+ { "Ubuntu", 12, "Regular Class", 'm' }, |
+ /* Cyrillic small letter sha */ |
+ { "Verdana", 10, "Regular Class", 0x448 }, |
+ { "Verdana", 11, "Regular Class", 0x448 }, |
+ { "Verdana and Clones", 12, "Regular Class", 'i' }, |
+ { "Verdana and Clones", 12, "Regular Class", 'j' }, |
+ { "Verdana and Clones", 12, "Regular Class", 'l' }, |
+ { "Verdana and Clones", 12, "Regular Class", 'm' }, |
+ { "Verdana and Clones", 13, "Regular Class", 'i' }, |
+ { "Verdana and Clones", 13, "Regular Class", 'j' }, |
+ { "Verdana and Clones", 13, "Regular Class", 'l' }, |
+ { "Verdana and Clones", 14, "Regular Class", 'm' }, |
+ }; |
+ |
+ |
+ /* Scaling slightly in the x-direction prior to hinting results in */ |
+ /* more visually pleasing glyphs in certain cases. */ |
+ /* This sometimes needs to be coordinated with compatible width rules. */ |
+ /* A value of 1000 corresponds to a scaled value of 1.0. */ |
+ |
+#define X_SCALING_RULES_SIZE 50 |
+ |
+ static const SPH_ScaleRule X_SCALING_Rules[X_SCALING_RULES_SIZE] = |
+ { |
+ { "DejaVu Sans", 12, "Regular Class", 'm', 950 }, |
+ { "Verdana and Clones", 12, "Regular Class", 'a', 1100 }, |
+ { "Verdana and Clones", 13, "Regular Class", 'a', 1050 }, |
+ { "Arial", 11, "Regular Class", 'm', 975 }, |
+ { "Arial", 12, "Regular Class", 'm', 1050 }, |
+ /* Cyrillic small letter el */ |
+ { "Arial", 13, "Regular Class", 0x43B, 950 }, |
+ { "Arial", 13, "Regular Class", 'o', 950 }, |
+ { "Arial", 13, "Regular Class", 'e', 950 }, |
+ { "Arial", 14, "Regular Class", 'm', 950 }, |
+ /* Cyrillic small letter el */ |
+ { "Arial", 15, "Regular Class", 0x43B, 925 }, |
+ { "Bitstream Vera Sans", 10, "Regular/Italic Class", 0, 1100 }, |
+ { "Bitstream Vera Sans", 12, "Regular/Italic Class", 0, 1050 }, |
+ { "Bitstream Vera Sans", 16, "Regular Class", 0, 1050 }, |
+ { "Bitstream Vera Sans", 9, "Regular/Italic Class", 0, 1050 }, |
+ { "DejaVu Sans", 12, "Regular Class", 'l', 975 }, |
+ { "DejaVu Sans", 12, "Regular Class", 'i', 975 }, |
+ { "DejaVu Sans", 12, "Regular Class", 'j', 975 }, |
+ { "DejaVu Sans", 13, "Regular Class", 'l', 950 }, |
+ { "DejaVu Sans", 13, "Regular Class", 'i', 950 }, |
+ { "DejaVu Sans", 13, "Regular Class", 'j', 950 }, |
+ { "DejaVu Sans", 10, "Regular/Italic Class", 0, 1100 }, |
+ { "DejaVu Sans", 12, "Regular/Italic Class", 0, 1050 }, |
+ { "Georgia", 10, "", 0, 1050 }, |
+ { "Georgia", 11, "", 0, 1100 }, |
+ { "Georgia", 12, "", 0, 1025 }, |
+ { "Georgia", 13, "", 0, 1050 }, |
+ { "Georgia", 16, "", 0, 1050 }, |
+ { "Georgia", 17, "", 0, 1030 }, |
+ { "Liberation Sans", 12, "Regular Class", 'm', 1100 }, |
+ { "Lucida Grande", 11, "Regular Class", 'm', 1100 }, |
+ { "Microsoft Sans Serif", 11, "Regular Class", 'm', 950 }, |
+ { "Microsoft Sans Serif", 12, "Regular Class", 'm', 1050 }, |
+ { "Segoe UI", 12, "Regular Class", 'H', 1050 }, |
+ { "Segoe UI", 12, "Regular Class", 'm', 1050 }, |
+ { "Segoe UI", 14, "Regular Class", 'm', 1050 }, |
+ { "Tahoma", 11, "Regular Class", 'i', 975 }, |
+ { "Tahoma", 11, "Regular Class", 'l', 975 }, |
+ { "Tahoma", 11, "Regular Class", 'j', 900 }, |
+ { "Tahoma", 11, "Regular Class", 'm', 918 }, |
+ { "Verdana", 10, "Regular/Italic Class", 0, 1100 }, |
+ { "Verdana", 12, "Regular Class", 'm', 975 }, |
+ { "Verdana", 12, "Regular/Italic Class", 0, 1050 }, |
+ { "Verdana", 13, "Regular/Italic Class", 'i', 950 }, |
+ { "Verdana", 13, "Regular/Italic Class", 'j', 950 }, |
+ { "Verdana", 13, "Regular/Italic Class", 'l', 950 }, |
+ { "Verdana", 16, "Regular Class", 0, 1050 }, |
+ { "Verdana", 9, "Regular/Italic Class", 0, 1050 }, |
+ { "Times New Roman", 16, "Regular Class", 'm', 918 }, |
+ { "Trebuchet MS", 11, "Regular Class", 'm', 800 }, |
+ { "Trebuchet MS", 12, "Regular Class", 'm', 800 }, |
+ }; |
+ |
+#else |
+ |
+#define COMPATIBLE_WIDTHS_RULES_SIZE 1 |
+ |
+ static const SPH_TweakRule COMPATIBLE_WIDTHS_Rules |
+ [COMPATIBLE_WIDTHS_RULES_SIZE] = |
+ { |
+ { "-", 0, "", 0 }, |
+ }; |
+ |
+ |
+#define X_SCALING_RULES_SIZE 1 |
+ |
+ static const SPH_ScaleRule X_SCALING_Rules |
+ [X_SCALING_RULES_SIZE] = |
+ { |
+ { "-", 0, "", 0, 1000 }, |
+ }; |
+ |
+#endif /* FORCE_NATURAL_WIDTHS */ |
+ |
+ |
+ FT_LOCAL_DEF( FT_Bool ) |
+ is_member_of_family_class( const FT_String* detected_font_name, |
+ const FT_String* rule_font_name ) |
+ { |
+ FT_UInt i, j; |
+ |
+ |
+ /* Does font name match rule family? */ |
+ if ( strcmp( detected_font_name, rule_font_name ) == 0 ) |
+ return TRUE; |
+ |
+ /* Is font name a wildcard ""? */ |
+ if ( strcmp( rule_font_name, "" ) == 0 ) |
+ return TRUE; |
+ |
+ /* Is font name contained in a class list? */ |
+ for ( i = 0; i < FAMILY_CLASS_RULES_SIZE; i++ ) |
+ { |
+ if ( strcmp( FAMILY_CLASS_Rules[i].name, rule_font_name ) == 0 ) |
+ { |
+ for ( j = 0; j < SPH_MAX_CLASS_MEMBERS; j++ ) |
+ { |
+ if ( strcmp( FAMILY_CLASS_Rules[i].member[j], "" ) == 0 ) |
+ continue; |
+ if ( strcmp( FAMILY_CLASS_Rules[i].member[j], |
+ detected_font_name ) == 0 ) |
+ return TRUE; |
+ } |
+ } |
+ } |
+ |
+ return FALSE; |
+ } |
+ |
+ |
+ FT_LOCAL_DEF( FT_Bool ) |
+ is_member_of_style_class( const FT_String* detected_font_style, |
+ const FT_String* rule_font_style ) |
+ { |
+ FT_UInt i, j; |
+ |
+ |
+ /* Does font style match rule style? */ |
+ if ( strcmp( detected_font_style, rule_font_style ) == 0 ) |
+ return TRUE; |
+ |
+ /* Is font style a wildcard ""? */ |
+ if ( strcmp( rule_font_style, "" ) == 0 ) |
+ return TRUE; |
+ |
+ /* Is font style contained in a class list? */ |
+ for ( i = 0; i < STYLE_CLASS_RULES_SIZE; i++ ) |
+ { |
+ if ( strcmp( STYLE_CLASS_Rules[i].name, rule_font_style ) == 0 ) |
+ { |
+ for ( j = 0; j < SPH_MAX_CLASS_MEMBERS; j++ ) |
+ { |
+ if ( strcmp( STYLE_CLASS_Rules[i].member[j], "" ) == 0 ) |
+ continue; |
+ if ( strcmp( STYLE_CLASS_Rules[i].member[j], |
+ detected_font_style ) == 0 ) |
+ return TRUE; |
+ } |
+ } |
+ } |
+ |
+ return FALSE; |
+ } |
+ |
+ |
+ FT_LOCAL_DEF( FT_Bool ) |
+ sph_test_tweak( TT_Face face, |
+ const FT_String* family, |
+ FT_UInt ppem, |
+ const FT_String* style, |
+ FT_UInt glyph_index, |
+ const SPH_TweakRule* rule, |
+ FT_UInt num_rules ) |
+ { |
+ FT_UInt i; |
+ |
+ |
+ /* rule checks may be able to be optimized further */ |
+ for ( i = 0; i < num_rules; i++ ) |
+ { |
+ if ( family && |
+ ( is_member_of_family_class ( family, rule[i].family ) ) ) |
+ if ( rule[i].ppem == 0 || |
+ rule[i].ppem == ppem ) |
+ if ( style && |
+ is_member_of_style_class ( style, rule[i].style ) ) |
+ if ( rule[i].glyph == 0 || |
+ FT_Get_Char_Index( (FT_Face)face, |
+ rule[i].glyph ) == glyph_index ) |
+ return TRUE; |
+ } |
+ |
+ return FALSE; |
+ } |
+ |
+ |
+ static FT_UInt |
+ scale_test_tweak( TT_Face face, |
+ const FT_String* family, |
+ FT_UInt ppem, |
+ const FT_String* style, |
+ FT_UInt glyph_index, |
+ const SPH_ScaleRule* rule, |
+ FT_UInt num_rules ) |
+ { |
+ FT_UInt i; |
+ |
+ |
+ /* rule checks may be able to be optimized further */ |
+ for ( i = 0; i < num_rules; i++ ) |
+ { |
+ if ( family && |
+ ( is_member_of_family_class ( family, rule[i].family ) ) ) |
+ if ( rule[i].ppem == 0 || |
+ rule[i].ppem == ppem ) |
+ if ( style && |
+ is_member_of_style_class( style, rule[i].style ) ) |
+ if ( rule[i].glyph == 0 || |
+ FT_Get_Char_Index( (FT_Face)face, |
+ rule[i].glyph ) == glyph_index ) |
+ return rule[i].scale; |
+ } |
+ |
+ return 1000; |
+ } |
+ |
+ |
+ FT_LOCAL_DEF( FT_UInt ) |
+ sph_test_tweak_x_scaling( TT_Face face, |
+ const FT_String* family, |
+ FT_UInt ppem, |
+ const FT_String* style, |
+ FT_UInt glyph_index ) |
+ { |
+ return scale_test_tweak( face, family, ppem, style, glyph_index, |
+ X_SCALING_Rules, X_SCALING_RULES_SIZE ); |
+ } |
+ |
+ |
+#define TWEAK_RULES( x ) \ |
+ if ( sph_test_tweak( face, family, ppem, style, glyph_index, \ |
+ x##_Rules, x##_RULES_SIZE ) ) \ |
+ loader->exec->sph_tweak_flags |= SPH_TWEAK_##x; |
+ |
+#define TWEAK_RULES_EXCEPTIONS( x ) \ |
+ if ( sph_test_tweak( face, family, ppem, style, glyph_index, \ |
+ x##_Rules_Exceptions, x##_RULES_EXCEPTIONS_SIZE ) ) \ |
+ loader->exec->sph_tweak_flags &= ~SPH_TWEAK_##x; |
+ |
+ |
+ FT_LOCAL_DEF( void ) |
+ sph_set_tweaks( TT_Loader loader, |
+ FT_UInt glyph_index ) |
+ { |
+ TT_Face face = (TT_Face)loader->face; |
+ FT_String* family = face->root.family_name; |
+ int ppem = loader->size->metrics.x_ppem; |
+ FT_String* style = face->root.style_name; |
+ |
+ |
+ /* don't apply rules if style isn't set */ |
+ if ( !face->root.style_name ) |
+ return; |
+ |
+#ifdef SPH_DEBUG_MORE_VERBOSE |
+ printf( "%s,%d,%s,%c=%d ", |
+ family, ppem, style, glyph_index, glyph_index ); |
+#endif |
+ |
+ TWEAK_RULES( PIXEL_HINTING ); |
+ |
+ if ( loader->exec->sph_tweak_flags & SPH_TWEAK_PIXEL_HINTING ) |
+ { |
+ loader->exec->ignore_x_mode = FALSE; |
+ return; |
+ } |
+ |
+ TWEAK_RULES( ALLOW_X_DMOVE ); |
+ TWEAK_RULES( ALWAYS_DO_DELTAP ); |
+ TWEAK_RULES( ALWAYS_SKIP_DELTAP ); |
+ TWEAK_RULES( DEEMBOLDEN ); |
+ TWEAK_RULES( DO_SHPIX ); |
+ TWEAK_RULES( EMBOLDEN ); |
+ TWEAK_RULES( MIAP_HACK ); |
+ TWEAK_RULES( NORMAL_ROUND ); |
+ TWEAK_RULES( NO_ALIGNRP_AFTER_IUP ); |
+ TWEAK_RULES( NO_CALL_AFTER_IUP ); |
+ TWEAK_RULES( NO_DELTAP_AFTER_IUP ); |
+ TWEAK_RULES( RASTERIZER_35 ); |
+ TWEAK_RULES( SKIP_IUP ); |
+ |
+ TWEAK_RULES( SKIP_OFFPIXEL_Y_MOVES ); |
+ TWEAK_RULES_EXCEPTIONS( SKIP_OFFPIXEL_Y_MOVES ); |
+ |
+ TWEAK_RULES( SKIP_NONPIXEL_Y_MOVES_DELTAP ); |
+ |
+ TWEAK_RULES( SKIP_NONPIXEL_Y_MOVES ); |
+ TWEAK_RULES_EXCEPTIONS( SKIP_NONPIXEL_Y_MOVES ); |
+ |
+ TWEAK_RULES( ROUND_NONPIXEL_Y_MOVES ); |
+ TWEAK_RULES_EXCEPTIONS( ROUND_NONPIXEL_Y_MOVES ); |
+ |
+ if ( loader->exec->sph_tweak_flags & SPH_TWEAK_RASTERIZER_35 ) |
+ { |
+ if ( loader->exec->rasterizer_version != TT_INTERPRETER_VERSION_35 ) |
+ { |
+ loader->exec->rasterizer_version = TT_INTERPRETER_VERSION_35; |
+ loader->exec->size->cvt_ready = FALSE; |
+ |
+ tt_size_ready_bytecode( |
+ loader->exec->size, |
+ FT_BOOL( loader->load_flags & FT_LOAD_PEDANTIC ) ); |
+ } |
+ else |
+ loader->exec->rasterizer_version = TT_INTERPRETER_VERSION_35; |
+ } |
+ else |
+ { |
+ if ( loader->exec->rasterizer_version != |
+ SPH_OPTION_SET_RASTERIZER_VERSION ) |
+ { |
+ loader->exec->rasterizer_version = SPH_OPTION_SET_RASTERIZER_VERSION; |
+ loader->exec->size->cvt_ready = FALSE; |
+ |
+ tt_size_ready_bytecode( |
+ loader->exec->size, |
+ FT_BOOL( loader->load_flags & FT_LOAD_PEDANTIC ) ); |
+ } |
+ else |
+ loader->exec->rasterizer_version = SPH_OPTION_SET_RASTERIZER_VERSION; |
+ } |
+ |
+ if ( IS_HINTED( loader->load_flags ) ) |
+ { |
+ TWEAK_RULES( TIMES_NEW_ROMAN_HACK ); |
+ TWEAK_RULES( COURIER_NEW_2_HACK ); |
+ } |
+ |
+ if ( sph_test_tweak( face, family, ppem, style, glyph_index, |
+ COMPATIBILITY_MODE_Rules, COMPATIBILITY_MODE_RULES_SIZE ) ) |
+ loader->exec->face->sph_compatibility_mode = TRUE; |
+ |
+ |
+ if ( IS_HINTED( loader->load_flags ) ) |
+ { |
+ if ( sph_test_tweak( face, family, ppem, style, glyph_index, |
+ COMPATIBLE_WIDTHS_Rules, COMPATIBLE_WIDTHS_RULES_SIZE ) ) |
+ loader->exec->compatible_widths |= TRUE; |
+ } |
+ } |
+ |
+#else /* !TT_CONFIG_OPTION_SUBPIXEL_HINTING */ |
+ |
+ /* ANSI C doesn't like empty source files */ |
+ typedef int _tt_subpix_dummy; |
+ |
+#endif /* !TT_CONFIG_OPTION_SUBPIXEL_HINTING */ |
+ |
+ |
+/* END */ |