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annotate freetype2/freetype/ftmodapi.h @ 1769:4baed436fc58 draft

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minor fix
author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Sat, 23 Nov 2013 02:15:22 +0900
parents a8ab91f49cac
children
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1 /***************************************************************************/
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2 /* */
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3 /* ftmodapi.h */
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4 /* */
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5 /* FreeType modules public interface (specification). */
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6 /* */
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7 /* Copyright 1996-2001, 2002, 2003, 2006, 2008, 2009, 2010 by */
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8 /* David Turner, Robert Wilhelm, and Werner Lemberg. */
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9 /* */
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10 /* This file is part of the FreeType project, and may only be used, */
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11 /* modified, and distributed under the terms of the FreeType project */
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12 /* license, LICENSE.TXT. By continuing to use, modify, or distribute */
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13 /* this file you indicate that you have read the license and */
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14 /* understand and accept it fully. */
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15 /* */
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16 /***************************************************************************/
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18
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19 #ifndef __FTMODAPI_H__
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20 #define __FTMODAPI_H__
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22
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23 #include <ft2build.h>
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24 #include FT_FREETYPE_H
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25
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26 #ifdef FREETYPE_H
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27 #error "freetype.h of FreeType 1 has been loaded!"
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28 #error "Please fix the directory search order for header files"
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29 #error "so that freetype.h of FreeType 2 is found first."
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30 #endif
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32
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33 FT_BEGIN_HEADER
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34
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35
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36 /*************************************************************************/
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37 /* */
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38 /* <Section> */
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39 /* module_management */
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40 /* */
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41 /* <Title> */
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42 /* Module Management */
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43 /* */
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44 /* <Abstract> */
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45 /* How to add, upgrade, and remove modules from FreeType. */
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46 /* */
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47 /* <Description> */
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48 /* The definitions below are used to manage modules within FreeType. */
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49 /* Modules can be added, upgraded, and removed at runtime. */
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50 /* */
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51 /*************************************************************************/
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52
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53
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54 /* module bit flags */
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55 #define FT_MODULE_FONT_DRIVER 1 /* this module is a font driver */
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56 #define FT_MODULE_RENDERER 2 /* this module is a renderer */
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57 #define FT_MODULE_HINTER 4 /* this module is a glyph hinter */
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58 #define FT_MODULE_STYLER 8 /* this module is a styler */
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59
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60 #define FT_MODULE_DRIVER_SCALABLE 0x100 /* the driver supports */
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61 /* scalable fonts */
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62 #define FT_MODULE_DRIVER_NO_OUTLINES 0x200 /* the driver does not */
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63 /* support vector outlines */
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64 #define FT_MODULE_DRIVER_HAS_HINTER 0x400 /* the driver provides its */
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65 /* own hinter */
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66
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67
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68 /* deprecated values */
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69 #define ft_module_font_driver FT_MODULE_FONT_DRIVER
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70 #define ft_module_renderer FT_MODULE_RENDERER
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71 #define ft_module_hinter FT_MODULE_HINTER
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72 #define ft_module_styler FT_MODULE_STYLER
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73
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74 #define ft_module_driver_scalable FT_MODULE_DRIVER_SCALABLE
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75 #define ft_module_driver_no_outlines FT_MODULE_DRIVER_NO_OUTLINES
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76 #define ft_module_driver_has_hinter FT_MODULE_DRIVER_HAS_HINTER
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77
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78
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79 typedef FT_Pointer FT_Module_Interface;
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80
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81
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82 /*************************************************************************/
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83 /* */
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84 /* <FuncType> */
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85 /* FT_Module_Constructor */
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86 /* */
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87 /* <Description> */
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88 /* A function used to initialize (not create) a new module object. */
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89 /* */
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90 /* <Input> */
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91 /* module :: The module to initialize. */
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92 /* */
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93 typedef FT_Error
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94 (*FT_Module_Constructor)( FT_Module module );
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95
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96
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97 /*************************************************************************/
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98 /* */
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99 /* <FuncType> */
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100 /* FT_Module_Destructor */
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101 /* */
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102 /* <Description> */
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103 /* A function used to finalize (not destroy) a given module object. */
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104 /* */
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105 /* <Input> */
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106 /* module :: The module to finalize. */
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107 /* */
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108 typedef void
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109 (*FT_Module_Destructor)( FT_Module module );
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110
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111
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112 /*************************************************************************/
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113 /* */
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114 /* <FuncType> */
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115 /* FT_Module_Requester */
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116 /* */
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117 /* <Description> */
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118 /* A function used to query a given module for a specific interface. */
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119 /* */
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120 /* <Input> */
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121 /* module :: The module to finalize. */
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122 /* */
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123 /* name :: The name of the interface in the module. */
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124 /* */
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125 typedef FT_Module_Interface
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126 (*FT_Module_Requester)( FT_Module module,
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127 const char* name );
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128
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129
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130 /*************************************************************************/
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131 /* */
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132 /* <Struct> */
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133 /* FT_Module_Class */
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134 /* */
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135 /* <Description> */
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136 /* The module class descriptor. */
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137 /* */
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138 /* <Fields> */
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139 /* module_flags :: Bit flags describing the module. */
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140 /* */
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141 /* module_size :: The size of one module object/instance in */
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142 /* bytes. */
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143 /* */
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144 /* module_name :: The name of the module. */
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145 /* */
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146 /* module_version :: The version, as a 16.16 fixed number */
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147 /* (major.minor). */
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148 /* */
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149 /* module_requires :: The version of FreeType this module requires, */
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150 /* as a 16.16 fixed number (major.minor). Starts */
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151 /* at version 2.0, i.e., 0x20000. */
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152 /* */
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153 /* module_init :: The initializing function. */
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154 /* */
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155 /* module_done :: The finalizing function. */
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156 /* */
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157 /* get_interface :: The interface requesting function. */
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158 /* */
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159 typedef struct FT_Module_Class_
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160 {
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161 FT_ULong module_flags;
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162 FT_Long module_size;
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163 const FT_String* module_name;
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164 FT_Fixed module_version;
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165 FT_Fixed module_requires;
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166
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167 const void* module_interface;
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168
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169 FT_Module_Constructor module_init;
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170 FT_Module_Destructor module_done;
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171 FT_Module_Requester get_interface;
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172
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173 } FT_Module_Class;
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174
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175
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176 /*************************************************************************/
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177 /* */
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178 /* <Function> */
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179 /* FT_Add_Module */
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180 /* */
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181 /* <Description> */
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182 /* Add a new module to a given library instance. */
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183 /* */
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184 /* <InOut> */
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185 /* library :: A handle to the library object. */
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186 /* */
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187 /* <Input> */
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188 /* clazz :: A pointer to class descriptor for the module. */
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189 /* */
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190 /* <Return> */
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191 /* FreeType error code. 0~means success. */
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192 /* */
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193 /* <Note> */
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194 /* An error will be returned if a module already exists by that name, */
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195 /* or if the module requires a version of FreeType that is too great. */
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196 /* */
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197 FT_EXPORT( FT_Error )
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198 FT_Add_Module( FT_Library library,
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199 const FT_Module_Class* clazz );
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200
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201
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202 /*************************************************************************/
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203 /* */
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204 /* <Function> */
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205 /* FT_Get_Module */
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206 /* */
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207 /* <Description> */
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208 /* Find a module by its name. */
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209 /* */
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210 /* <Input> */
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211 /* library :: A handle to the library object. */
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212 /* */
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213 /* module_name :: The module's name (as an ASCII string). */
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214 /* */
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215 /* <Return> */
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216 /* A module handle. 0~if none was found. */
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217 /* */
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218 /* <Note> */
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219 /* FreeType's internal modules aren't documented very well, and you */
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220 /* should look up the source code for details. */
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221 /* */
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222 FT_EXPORT( FT_Module )
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223 FT_Get_Module( FT_Library library,
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224 const char* module_name );
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225
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226
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227 /*************************************************************************/
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228 /* */
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229 /* <Function> */
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230 /* FT_Remove_Module */
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231 /* */
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232 /* <Description> */
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233 /* Remove a given module from a library instance. */
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234 /* */
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235 /* <InOut> */
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236 /* library :: A handle to a library object. */
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237 /* */
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238 /* <Input> */
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239 /* module :: A handle to a module object. */
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240 /* */
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241 /* <Return> */
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242 /* FreeType error code. 0~means success. */
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243 /* */
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244 /* <Note> */
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245 /* The module object is destroyed by the function in case of success. */
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246 /* */
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247 FT_EXPORT( FT_Error )
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248 FT_Remove_Module( FT_Library library,
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249 FT_Module module );
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250
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251
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252 /*************************************************************************/
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253 /* */
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254 /* <Function> */
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255 /* FT_Reference_Library */
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256 /* */
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257 /* <Description> */
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258 /* A counter gets initialized to~1 at the time an @FT_Library */
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259 /* structure is created. This function increments the counter. */
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260 /* @FT_Done_Library then only destroys a library if the counter is~1, */
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261 /* otherwise it simply decrements the counter. */
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262 /* */
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263 /* This function helps in managing life-cycles of structures which */
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264 /* reference @FT_Library objects. */
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265 /* */
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266 /* <Input> */
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267 /* library :: A handle to a target library object. */
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268 /* */
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269 /* <Return> */
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270 /* FreeType error code. 0~means success. */
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271 /* */
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272 /* <Since> */
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273 /* 2.4.2 */
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274 /* */
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275 FT_EXPORT( FT_Error )
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276 FT_Reference_Library( FT_Library library );
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277
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278
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279 /*************************************************************************/
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280 /* */
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281 /* <Function> */
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282 /* FT_New_Library */
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283 /* */
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284 /* <Description> */
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285 /* This function is used to create a new FreeType library instance */
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286 /* from a given memory object. It is thus possible to use libraries */
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287 /* with distinct memory allocators within the same program. */
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288 /* */
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289 /* Normally, you would call this function (followed by a call to */
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290 /* @FT_Add_Default_Modules or a series of calls to @FT_Add_Module) */
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291 /* instead of @FT_Init_FreeType to initialize the FreeType library. */
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292 /* */
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293 /* Don't use @FT_Done_FreeType but @FT_Done_Library to destroy a */
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294 /* library instance. */
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295 /* */
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296 /* <Input> */
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297 /* memory :: A handle to the original memory object. */
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298 /* */
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299 /* <Output> */
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300 /* alibrary :: A pointer to handle of a new library object. */
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301 /* */
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302 /* <Return> */
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303 /* FreeType error code. 0~means success. */
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304 /* */
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305 /* <Note> */
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306 /* See the discussion of reference counters in the description of */
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307 /* @FT_Reference_Library. */
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308 /* */
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309 FT_EXPORT( FT_Error )
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310 FT_New_Library( FT_Memory memory,
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311 FT_Library *alibrary );
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312
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313
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314 /*************************************************************************/
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315 /* */
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316 /* <Function> */
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317 /* FT_Done_Library */
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318 /* */
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319 /* <Description> */
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320 /* Discard a given library object. This closes all drivers and */
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321 /* discards all resource objects. */
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322 /* */
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323 /* <Input> */
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324 /* library :: A handle to the target library. */
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325 /* */
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326 /* <Return> */
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327 /* FreeType error code. 0~means success. */
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328 /* */
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diff changeset
329 /* <Note> */
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330 /* See the discussion of reference counters in the description of */
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331 /* @FT_Reference_Library. */
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332 /* */
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diff changeset
333 FT_EXPORT( FT_Error )
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334 FT_Done_Library( FT_Library library );
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335
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336 /* */
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337
a8ab91f49cac add freetype2,ft2build.h
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338 typedef void
a8ab91f49cac add freetype2,ft2build.h
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339 (*FT_DebugHook_Func)( void* arg );
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340
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341
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342 /*************************************************************************/
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343 /* */
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344 /* <Function> */
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345 /* FT_Set_Debug_Hook */
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346 /* */
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347 /* <Description> */
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348 /* Set a debug hook function for debugging the interpreter of a font */
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349 /* format. */
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diff changeset
350 /* */
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diff changeset
351 /* <InOut> */
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352 /* library :: A handle to the library object. */
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353 /* */
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354 /* <Input> */
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diff changeset
355 /* hook_index :: The index of the debug hook. You should use the */
a8ab91f49cac add freetype2,ft2build.h
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diff changeset
356 /* values defined in `ftobjs.h', e.g., */
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357 /* `FT_DEBUG_HOOK_TRUETYPE'. */
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diff changeset
358 /* */
a8ab91f49cac add freetype2,ft2build.h
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diff changeset
359 /* debug_hook :: The function used to debug the interpreter. */
a8ab91f49cac add freetype2,ft2build.h
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diff changeset
360 /* */
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diff changeset
361 /* <Note> */
a8ab91f49cac add freetype2,ft2build.h
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diff changeset
362 /* Currently, four debug hook slots are available, but only two (for */
a8ab91f49cac add freetype2,ft2build.h
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diff changeset
363 /* the TrueType and the Type~1 interpreter) are defined. */
a8ab91f49cac add freetype2,ft2build.h
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364 /* */
a8ab91f49cac add freetype2,ft2build.h
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diff changeset
365 /* Since the internal headers of FreeType are no longer installed, */
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366 /* the symbol `FT_DEBUG_HOOK_TRUETYPE' isn't available publicly. */
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367 /* This is a bug and will be fixed in a forthcoming release. */
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diff changeset
368 /* */
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369 FT_EXPORT( void )
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370 FT_Set_Debug_Hook( FT_Library library,
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diff changeset
371 FT_UInt hook_index,
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diff changeset
372 FT_DebugHook_Func debug_hook );
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373
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374
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375 /*************************************************************************/
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376 /* */
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377 /* <Function> */
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378 /* FT_Add_Default_Modules */
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379 /* */
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380 /* <Description> */
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381 /* Add the set of default drivers to a given library object. */
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382 /* This is only useful when you create a library object with */
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383 /* @FT_New_Library (usually to plug a custom memory manager). */
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384 /* */
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385 /* <InOut> */
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386 /* library :: A handle to a new library object. */
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387 /* */
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388 FT_EXPORT( void )
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389 FT_Add_Default_Modules( FT_Library library );
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390
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391
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392
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393 /**************************************************************************
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394 *
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395 * @section:
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396 * truetype_engine
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397 *
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398 * @title:
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399 * The TrueType Engine
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400 *
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401 * @abstract:
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402 * TrueType bytecode support.
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403 *
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404 * @description:
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405 * This section contains a function used to query the level of TrueType
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406 * bytecode support compiled in this version of the library.
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407 *
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408 */
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409
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410
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411 /**************************************************************************
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412 *
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413 * @enum:
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414 * FT_TrueTypeEngineType
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415 *
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416 * @description:
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417 * A list of values describing which kind of TrueType bytecode
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418 * engine is implemented in a given FT_Library instance. It is used
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419 * by the @FT_Get_TrueType_Engine_Type function.
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420 *
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421 * @values:
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422 * FT_TRUETYPE_ENGINE_TYPE_NONE ::
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423 * The library doesn't implement any kind of bytecode interpreter.
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424 *
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425 * FT_TRUETYPE_ENGINE_TYPE_UNPATENTED ::
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426 * The library implements a bytecode interpreter that doesn't
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427 * support the patented operations of the TrueType virtual machine.
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428 *
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429 * Its main use is to load certain Asian fonts which position and
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430 * scale glyph components with bytecode instructions. It produces
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431 * bad output for most other fonts.
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432 *
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433 * FT_TRUETYPE_ENGINE_TYPE_PATENTED ::
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434 * The library implements a bytecode interpreter that covers
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435 * the full instruction set of the TrueType virtual machine (this
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436 * was governed by patents until May 2010, hence the name).
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437 *
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438 * @since:
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439 * 2.2
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440 *
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441 */
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442 typedef enum FT_TrueTypeEngineType_
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443 {
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444 FT_TRUETYPE_ENGINE_TYPE_NONE = 0,
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445 FT_TRUETYPE_ENGINE_TYPE_UNPATENTED,
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446 FT_TRUETYPE_ENGINE_TYPE_PATENTED
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447
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448 } FT_TrueTypeEngineType;
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449
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450
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451 /**************************************************************************
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452 *
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453 * @func:
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454 * FT_Get_TrueType_Engine_Type
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455 *
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456 * @description:
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457 * Return an @FT_TrueTypeEngineType value to indicate which level of
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458 * the TrueType virtual machine a given library instance supports.
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459 *
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460 * @input:
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461 * library ::
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462 * A library instance.
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463 *
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464 * @return:
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465 * A value indicating which level is supported.
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466 *
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467 * @since:
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468 * 2.2
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469 *
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470 */
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471 FT_EXPORT( FT_TrueTypeEngineType )
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472 FT_Get_TrueType_Engine_Type( FT_Library library );
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473
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474
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475 /* */
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476
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477
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478 FT_END_HEADER
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479
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480 #endif /* __FTMODAPI_H__ */
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481
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482
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483 /* END */