1 /***************************************************************************/ |
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2 /* */ |
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3 /* ftcmanag.c */ |
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4 /* */ |
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5 /* FreeType Cache Manager (body). */ |
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6 /* */ |
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7 /* Copyright 2000-2001, 2002, 2003, 2004, 2005, 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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17 |
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18 |
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19 #include <ft2build.h> |
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20 #include FT_CACHE_H |
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21 #include "ftcmanag.h" |
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22 #include FT_INTERNAL_OBJECTS_H |
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23 #include FT_INTERNAL_DEBUG_H |
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24 #include FT_SIZES_H |
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25 |
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26 #include "ftccback.h" |
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27 #include "ftcerror.h" |
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28 |
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29 #ifdef FT_CONFIG_OPTION_PIC |
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30 #error "cache system does not support PIC yet" |
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31 #endif |
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32 |
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33 |
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34 #undef FT_COMPONENT |
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35 #define FT_COMPONENT trace_cache |
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36 |
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37 #define FTC_LRU_GET_MANAGER( lru ) ( (FTC_Manager)(lru)->user_data ) |
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38 |
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39 |
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40 static FT_Error |
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41 ftc_scaler_lookup_size( FTC_Manager manager, |
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42 FTC_Scaler scaler, |
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43 FT_Size *asize ) |
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44 { |
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45 FT_Face face; |
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46 FT_Size size = NULL; |
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47 FT_Error error; |
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48 |
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49 |
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50 error = FTC_Manager_LookupFace( manager, scaler->face_id, &face ); |
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51 if ( error ) |
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52 goto Exit; |
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53 |
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54 error = FT_New_Size( face, &size ); |
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55 if ( error ) |
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56 goto Exit; |
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57 |
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58 FT_Activate_Size( size ); |
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59 |
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60 if ( scaler->pixel ) |
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61 error = FT_Set_Pixel_Sizes( face, scaler->width, scaler->height ); |
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62 else |
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63 error = FT_Set_Char_Size( face, scaler->width, scaler->height, |
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64 scaler->x_res, scaler->y_res ); |
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65 if ( error ) |
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66 { |
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67 FT_Done_Size( size ); |
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68 size = NULL; |
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69 } |
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70 |
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71 Exit: |
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72 *asize = size; |
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73 return error; |
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74 } |
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75 |
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76 |
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77 typedef struct FTC_SizeNodeRec_ |
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78 { |
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79 FTC_MruNodeRec node; |
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80 FT_Size size; |
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81 FTC_ScalerRec scaler; |
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82 |
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83 } FTC_SizeNodeRec, *FTC_SizeNode; |
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84 |
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85 #define FTC_SIZE_NODE( x ) ( (FTC_SizeNode)( x ) ) |
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86 |
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87 |
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88 FT_CALLBACK_DEF( void ) |
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89 ftc_size_node_done( FTC_MruNode ftcnode, |
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90 FT_Pointer data ) |
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91 { |
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92 FTC_SizeNode node = (FTC_SizeNode)ftcnode; |
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93 FT_Size size = node->size; |
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94 FT_UNUSED( data ); |
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95 |
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96 |
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97 if ( size ) |
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98 FT_Done_Size( size ); |
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99 } |
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100 |
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101 |
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102 FT_CALLBACK_DEF( FT_Bool ) |
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103 ftc_size_node_compare( FTC_MruNode ftcnode, |
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104 FT_Pointer ftcscaler ) |
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105 { |
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106 FTC_SizeNode node = (FTC_SizeNode)ftcnode; |
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107 FTC_Scaler scaler = (FTC_Scaler)ftcscaler; |
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108 FTC_Scaler scaler0 = &node->scaler; |
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109 |
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110 |
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111 if ( FTC_SCALER_COMPARE( scaler0, scaler ) ) |
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112 { |
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113 FT_Activate_Size( node->size ); |
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114 return 1; |
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115 } |
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116 return 0; |
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117 } |
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118 |
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119 |
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120 FT_CALLBACK_DEF( FT_Error ) |
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121 ftc_size_node_init( FTC_MruNode ftcnode, |
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122 FT_Pointer ftcscaler, |
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123 FT_Pointer ftcmanager ) |
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124 { |
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125 FTC_SizeNode node = (FTC_SizeNode)ftcnode; |
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126 FTC_Scaler scaler = (FTC_Scaler)ftcscaler; |
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127 FTC_Manager manager = (FTC_Manager)ftcmanager; |
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128 |
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129 |
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130 node->scaler = scaler[0]; |
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131 |
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132 return ftc_scaler_lookup_size( manager, scaler, &node->size ); |
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133 } |
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134 |
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135 |
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136 FT_CALLBACK_DEF( FT_Error ) |
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137 ftc_size_node_reset( FTC_MruNode ftcnode, |
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138 FT_Pointer ftcscaler, |
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139 FT_Pointer ftcmanager ) |
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140 { |
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141 FTC_SizeNode node = (FTC_SizeNode)ftcnode; |
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142 FTC_Scaler scaler = (FTC_Scaler)ftcscaler; |
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143 FTC_Manager manager = (FTC_Manager)ftcmanager; |
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144 |
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145 |
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146 FT_Done_Size( node->size ); |
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147 |
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148 node->scaler = scaler[0]; |
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149 |
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150 return ftc_scaler_lookup_size( manager, scaler, &node->size ); |
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151 } |
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152 |
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153 |
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154 FT_CALLBACK_TABLE_DEF |
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155 const FTC_MruListClassRec ftc_size_list_class = |
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156 { |
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157 sizeof ( FTC_SizeNodeRec ), |
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158 ftc_size_node_compare, |
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159 ftc_size_node_init, |
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160 ftc_size_node_reset, |
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161 ftc_size_node_done |
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162 }; |
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163 |
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164 |
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165 /* helper function used by ftc_face_node_done */ |
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166 static FT_Bool |
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167 ftc_size_node_compare_faceid( FTC_MruNode ftcnode, |
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168 FT_Pointer ftcface_id ) |
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169 { |
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170 FTC_SizeNode node = (FTC_SizeNode)ftcnode; |
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171 FTC_FaceID face_id = (FTC_FaceID)ftcface_id; |
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172 |
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173 |
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174 return FT_BOOL( node->scaler.face_id == face_id ); |
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175 } |
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176 |
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177 |
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178 /* documentation is in ftcache.h */ |
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179 |
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180 FT_EXPORT_DEF( FT_Error ) |
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181 FTC_Manager_LookupSize( FTC_Manager manager, |
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182 FTC_Scaler scaler, |
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183 FT_Size *asize ) |
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184 { |
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185 FT_Error error; |
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186 FTC_MruNode mrunode; |
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187 |
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188 |
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189 if ( asize == NULL ) |
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190 return FTC_Err_Invalid_Argument; |
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191 |
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192 *asize = NULL; |
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193 |
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194 if ( !manager ) |
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195 return FTC_Err_Invalid_Cache_Handle; |
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196 |
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197 #ifdef FTC_INLINE |
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198 |
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199 FTC_MRULIST_LOOKUP_CMP( &manager->sizes, scaler, ftc_size_node_compare, |
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200 mrunode, error ); |
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201 |
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202 #else |
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203 error = FTC_MruList_Lookup( &manager->sizes, scaler, &mrunode ); |
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204 #endif |
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205 |
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206 if ( !error ) |
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207 *asize = FTC_SIZE_NODE( mrunode )->size; |
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208 |
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209 return error; |
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210 } |
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211 |
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212 |
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213 /*************************************************************************/ |
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214 /*************************************************************************/ |
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215 /***** *****/ |
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216 /***** FACE MRU IMPLEMENTATION *****/ |
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217 /***** *****/ |
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218 /*************************************************************************/ |
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219 /*************************************************************************/ |
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220 |
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221 typedef struct FTC_FaceNodeRec_ |
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222 { |
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223 FTC_MruNodeRec node; |
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224 FTC_FaceID face_id; |
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225 FT_Face face; |
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226 |
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227 } FTC_FaceNodeRec, *FTC_FaceNode; |
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228 |
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229 #define FTC_FACE_NODE( x ) ( ( FTC_FaceNode )( x ) ) |
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230 |
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231 |
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232 FT_CALLBACK_DEF( FT_Error ) |
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233 ftc_face_node_init( FTC_MruNode ftcnode, |
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234 FT_Pointer ftcface_id, |
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235 FT_Pointer ftcmanager ) |
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236 { |
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237 FTC_FaceNode node = (FTC_FaceNode)ftcnode; |
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238 FTC_FaceID face_id = (FTC_FaceID)ftcface_id; |
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239 FTC_Manager manager = (FTC_Manager)ftcmanager; |
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240 FT_Error error; |
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241 |
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242 |
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243 node->face_id = face_id; |
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244 |
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245 error = manager->request_face( face_id, |
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246 manager->library, |
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247 manager->request_data, |
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248 &node->face ); |
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249 if ( !error ) |
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250 { |
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251 /* destroy initial size object; it will be re-created later */ |
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252 if ( node->face->size ) |
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253 FT_Done_Size( node->face->size ); |
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254 } |
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255 |
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256 return error; |
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257 } |
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258 |
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259 |
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260 FT_CALLBACK_DEF( void ) |
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261 ftc_face_node_done( FTC_MruNode ftcnode, |
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262 FT_Pointer ftcmanager ) |
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263 { |
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264 FTC_FaceNode node = (FTC_FaceNode)ftcnode; |
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265 FTC_Manager manager = (FTC_Manager)ftcmanager; |
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266 |
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267 |
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268 /* we must begin by removing all scalers for the target face */ |
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269 /* from the manager's list */ |
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270 FTC_MruList_RemoveSelection( &manager->sizes, |
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271 ftc_size_node_compare_faceid, |
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272 node->face_id ); |
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273 |
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274 /* all right, we can discard the face now */ |
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275 FT_Done_Face( node->face ); |
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276 node->face = NULL; |
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277 node->face_id = NULL; |
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278 } |
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279 |
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280 |
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281 FT_CALLBACK_DEF( FT_Bool ) |
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282 ftc_face_node_compare( FTC_MruNode ftcnode, |
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283 FT_Pointer ftcface_id ) |
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284 { |
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285 FTC_FaceNode node = (FTC_FaceNode)ftcnode; |
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286 FTC_FaceID face_id = (FTC_FaceID)ftcface_id; |
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287 |
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288 |
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289 return FT_BOOL( node->face_id == face_id ); |
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290 } |
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291 |
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292 |
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293 FT_CALLBACK_TABLE_DEF |
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294 const FTC_MruListClassRec ftc_face_list_class = |
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295 { |
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296 sizeof ( FTC_FaceNodeRec), |
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297 |
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298 ftc_face_node_compare, |
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299 ftc_face_node_init, |
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300 0, /* FTC_MruNode_ResetFunc */ |
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301 ftc_face_node_done |
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302 }; |
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303 |
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304 |
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305 /* documentation is in ftcache.h */ |
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306 |
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307 FT_EXPORT_DEF( FT_Error ) |
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308 FTC_Manager_LookupFace( FTC_Manager manager, |
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309 FTC_FaceID face_id, |
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310 FT_Face *aface ) |
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311 { |
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312 FT_Error error; |
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313 FTC_MruNode mrunode; |
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314 |
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315 |
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316 if ( aface == NULL ) |
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317 return FTC_Err_Invalid_Argument; |
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318 |
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319 *aface = NULL; |
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320 |
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321 if ( !manager ) |
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322 return FTC_Err_Invalid_Cache_Handle; |
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323 |
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324 /* we break encapsulation for the sake of speed */ |
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325 #ifdef FTC_INLINE |
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326 |
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327 FTC_MRULIST_LOOKUP_CMP( &manager->faces, face_id, ftc_face_node_compare, |
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328 mrunode, error ); |
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329 |
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330 #else |
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331 error = FTC_MruList_Lookup( &manager->faces, face_id, &mrunode ); |
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332 #endif |
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333 |
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334 if ( !error ) |
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335 *aface = FTC_FACE_NODE( mrunode )->face; |
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336 |
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337 return error; |
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338 } |
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339 |
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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 /***** CACHE MANAGER ROUTINES *****/ |
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345 /***** *****/ |
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346 /*************************************************************************/ |
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347 /*************************************************************************/ |
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348 |
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349 |
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350 /* documentation is in ftcache.h */ |
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351 |
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352 FT_EXPORT_DEF( FT_Error ) |
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353 FTC_Manager_New( FT_Library library, |
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354 FT_UInt max_faces, |
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355 FT_UInt max_sizes, |
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356 FT_ULong max_bytes, |
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357 FTC_Face_Requester requester, |
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358 FT_Pointer req_data, |
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359 FTC_Manager *amanager ) |
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360 { |
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361 FT_Error error; |
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362 FT_Memory memory; |
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363 FTC_Manager manager = 0; |
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364 |
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365 |
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366 if ( !library ) |
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367 return FTC_Err_Invalid_Library_Handle; |
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368 |
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369 memory = library->memory; |
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370 |
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371 if ( FT_NEW( manager ) ) |
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372 goto Exit; |
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373 |
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374 if ( max_faces == 0 ) |
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375 max_faces = FTC_MAX_FACES_DEFAULT; |
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376 |
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377 if ( max_sizes == 0 ) |
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378 max_sizes = FTC_MAX_SIZES_DEFAULT; |
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379 |
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380 if ( max_bytes == 0 ) |
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381 max_bytes = FTC_MAX_BYTES_DEFAULT; |
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382 |
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383 manager->library = library; |
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384 manager->memory = memory; |
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385 manager->max_weight = max_bytes; |
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386 |
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387 manager->request_face = requester; |
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388 manager->request_data = req_data; |
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389 |
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390 FTC_MruList_Init( &manager->faces, |
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391 &ftc_face_list_class, |
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392 max_faces, |
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393 manager, |
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394 memory ); |
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395 |
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396 FTC_MruList_Init( &manager->sizes, |
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397 &ftc_size_list_class, |
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398 max_sizes, |
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399 manager, |
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400 memory ); |
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401 |
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402 *amanager = manager; |
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403 |
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404 Exit: |
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405 return error; |
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406 } |
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407 |
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408 |
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409 /* documentation is in ftcache.h */ |
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410 |
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411 FT_EXPORT_DEF( void ) |
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412 FTC_Manager_Done( FTC_Manager manager ) |
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413 { |
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414 FT_Memory memory; |
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415 FT_UInt idx; |
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416 |
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417 |
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418 if ( !manager || !manager->library ) |
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419 return; |
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420 |
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421 memory = manager->memory; |
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422 |
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423 /* now discard all caches */ |
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424 for (idx = manager->num_caches; idx-- > 0; ) |
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425 { |
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426 FTC_Cache cache = manager->caches[idx]; |
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427 |
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428 |
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429 if ( cache ) |
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430 { |
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431 cache->clazz.cache_done( cache ); |
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432 FT_FREE( cache ); |
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433 manager->caches[idx] = NULL; |
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434 } |
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435 } |
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436 manager->num_caches = 0; |
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437 |
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438 /* discard faces and sizes */ |
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439 FTC_MruList_Done( &manager->sizes ); |
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440 FTC_MruList_Done( &manager->faces ); |
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441 |
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442 manager->library = NULL; |
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443 manager->memory = NULL; |
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444 |
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445 FT_FREE( manager ); |
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446 } |
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447 |
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448 |
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449 /* documentation is in ftcache.h */ |
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450 |
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451 FT_EXPORT_DEF( void ) |
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452 FTC_Manager_Reset( FTC_Manager manager ) |
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453 { |
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454 if ( manager ) |
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455 { |
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456 FTC_MruList_Reset( &manager->sizes ); |
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457 FTC_MruList_Reset( &manager->faces ); |
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458 } |
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459 /* XXX: FIXME: flush the caches? */ |
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460 } |
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461 |
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462 |
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463 #ifdef FT_DEBUG_ERROR |
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464 |
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465 static void |
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466 FTC_Manager_Check( FTC_Manager manager ) |
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467 { |
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468 FTC_Node node, first; |
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469 |
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470 |
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471 first = manager->nodes_list; |
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472 |
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473 /* check node weights */ |
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474 if ( first ) |
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475 { |
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476 FT_ULong weight = 0; |
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477 |
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478 |
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479 node = first; |
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480 |
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481 do |
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482 { |
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483 FTC_Cache cache = manager->caches[node->cache_index]; |
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484 |
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485 |
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486 if ( (FT_UInt)node->cache_index >= manager->num_caches ) |
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487 FT_TRACE0(( "FTC_Manager_Check: invalid node (cache index = %ld\n", |
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488 node->cache_index )); |
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489 else |
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490 weight += cache->clazz.node_weight( node, cache ); |
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491 |
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492 node = FTC_NODE__NEXT( node ); |
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493 |
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494 } while ( node != first ); |
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495 |
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496 if ( weight != manager->cur_weight ) |
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497 FT_TRACE0(( "FTC_Manager_Check: invalid weight %ld instead of %ld\n", |
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498 manager->cur_weight, weight )); |
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499 } |
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500 |
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501 /* check circular list */ |
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502 if ( first ) |
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503 { |
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504 FT_UFast count = 0; |
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505 |
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506 |
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507 node = first; |
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508 do |
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509 { |
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510 count++; |
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511 node = FTC_NODE__NEXT( node ); |
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512 |
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513 } while ( node != first ); |
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514 |
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515 if ( count != manager->num_nodes ) |
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516 FT_TRACE0(( "FTC_Manager_Check:" |
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517 " invalid cache node count %d instead of %d\n", |
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518 manager->num_nodes, count )); |
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519 } |
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520 } |
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521 |
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522 #endif /* FT_DEBUG_ERROR */ |
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523 |
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524 |
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525 /* `Compress' the manager's data, i.e., get rid of old cache nodes */ |
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526 /* that are not referenced anymore in order to limit the total */ |
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527 /* memory used by the cache. */ |
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528 |
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529 /* documentation is in ftcmanag.h */ |
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530 |
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531 FT_LOCAL_DEF( void ) |
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532 FTC_Manager_Compress( FTC_Manager manager ) |
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533 { |
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534 FTC_Node node, first; |
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535 |
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536 |
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537 if ( !manager ) |
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538 return; |
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539 |
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540 first = manager->nodes_list; |
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541 |
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542 #ifdef FT_DEBUG_ERROR |
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543 FTC_Manager_Check( manager ); |
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544 |
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545 FT_TRACE0(( "compressing, weight = %ld, max = %ld, nodes = %d\n", |
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546 manager->cur_weight, manager->max_weight, |
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547 manager->num_nodes )); |
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548 #endif |
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549 |
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550 if ( manager->cur_weight < manager->max_weight || first == NULL ) |
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551 return; |
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552 |
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553 /* go to last node -- it's a circular list */ |
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554 node = FTC_NODE__PREV( first ); |
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555 do |
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556 { |
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557 FTC_Node prev; |
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558 |
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559 |
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560 prev = ( node == first ) ? NULL : FTC_NODE__PREV( node ); |
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561 |
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562 if ( node->ref_count <= 0 ) |
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563 ftc_node_destroy( node, manager ); |
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564 |
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565 node = prev; |
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566 |
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567 } while ( node && manager->cur_weight > manager->max_weight ); |
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568 } |
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569 |
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570 |
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571 /* documentation is in ftcmanag.h */ |
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572 |
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573 FT_LOCAL_DEF( FT_Error ) |
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574 FTC_Manager_RegisterCache( FTC_Manager manager, |
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575 FTC_CacheClass clazz, |
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576 FTC_Cache *acache ) |
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577 { |
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578 FT_Error error = FTC_Err_Invalid_Argument; |
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579 FTC_Cache cache = NULL; |
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580 |
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581 |
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582 if ( manager && clazz && acache ) |
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583 { |
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584 FT_Memory memory = manager->memory; |
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585 |
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586 |
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587 if ( manager->num_caches >= FTC_MAX_CACHES ) |
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588 { |
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589 error = FTC_Err_Too_Many_Caches; |
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590 FT_ERROR(( "FTC_Manager_RegisterCache:" |
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591 " too many registered caches\n" )); |
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592 goto Exit; |
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593 } |
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594 |
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595 if ( !FT_ALLOC( cache, clazz->cache_size ) ) |
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596 { |
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597 cache->manager = manager; |
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598 cache->memory = memory; |
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599 cache->clazz = clazz[0]; |
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600 cache->org_class = clazz; |
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601 |
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602 /* THIS IS VERY IMPORTANT! IT WILL WRETCH THE MANAGER */ |
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603 /* IF IT IS NOT SET CORRECTLY */ |
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604 cache->index = manager->num_caches; |
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605 |
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606 error = clazz->cache_init( cache ); |
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607 if ( error ) |
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608 { |
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609 clazz->cache_done( cache ); |
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610 FT_FREE( cache ); |
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611 goto Exit; |
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612 } |
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613 |
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614 manager->caches[manager->num_caches++] = cache; |
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615 } |
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616 } |
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617 |
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618 Exit: |
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619 if ( acache ) |
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620 *acache = cache; |
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621 return error; |
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622 } |
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623 |
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624 |
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625 FT_LOCAL_DEF( FT_UInt ) |
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626 FTC_Manager_FlushN( FTC_Manager manager, |
|
627 FT_UInt count ) |
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628 { |
|
629 FTC_Node first = manager->nodes_list; |
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630 FTC_Node node; |
|
631 FT_UInt result; |
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632 |
|
633 |
|
634 /* try to remove `count' nodes from the list */ |
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635 if ( first == NULL ) /* empty list! */ |
|
636 return 0; |
|
637 |
|
638 /* go to last node - it's a circular list */ |
|
639 node = FTC_NODE__PREV(first); |
|
640 for ( result = 0; result < count; ) |
|
641 { |
|
642 FTC_Node prev = FTC_NODE__PREV( node ); |
|
643 |
|
644 |
|
645 /* don't touch locked nodes */ |
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646 if ( node->ref_count <= 0 ) |
|
647 { |
|
648 ftc_node_destroy( node, manager ); |
|
649 result++; |
|
650 } |
|
651 |
|
652 if ( node == first ) |
|
653 break; |
|
654 |
|
655 node = prev; |
|
656 } |
|
657 return result; |
|
658 } |
|
659 |
|
660 |
|
661 /* documentation is in ftcache.h */ |
|
662 |
|
663 FT_EXPORT_DEF( void ) |
|
664 FTC_Manager_RemoveFaceID( FTC_Manager manager, |
|
665 FTC_FaceID face_id ) |
|
666 { |
|
667 FT_UInt nn; |
|
668 |
|
669 /* this will remove all FTC_SizeNode that correspond to |
|
670 * the face_id as well |
|
671 */ |
|
672 FTC_MruList_RemoveSelection( &manager->faces, |
|
673 ftc_face_node_compare, |
|
674 face_id ); |
|
675 |
|
676 for ( nn = 0; nn < manager->num_caches; nn++ ) |
|
677 FTC_Cache_RemoveFaceID( manager->caches[nn], face_id ); |
|
678 } |
|
679 |
|
680 |
|
681 /* documentation is in ftcache.h */ |
|
682 |
|
683 FT_EXPORT_DEF( void ) |
|
684 FTC_Node_Unref( FTC_Node node, |
|
685 FTC_Manager manager ) |
|
686 { |
|
687 if ( node && (FT_UInt)node->cache_index < manager->num_caches ) |
|
688 node->ref_count--; |
|
689 } |
|
690 |
|
691 |
|
692 #ifdef FT_CONFIG_OPTION_OLD_INTERNALS |
|
693 |
|
694 FT_EXPORT_DEF( FT_Error ) |
|
695 FTC_Manager_Lookup_Face( FTC_Manager manager, |
|
696 FTC_FaceID face_id, |
|
697 FT_Face *aface ) |
|
698 { |
|
699 return FTC_Manager_LookupFace( manager, face_id, aface ); |
|
700 } |
|
701 |
|
702 |
|
703 FT_EXPORT( FT_Error ) |
|
704 FTC_Manager_Lookup_Size( FTC_Manager manager, |
|
705 FTC_Font font, |
|
706 FT_Face *aface, |
|
707 FT_Size *asize ) |
|
708 { |
|
709 FTC_ScalerRec scaler; |
|
710 FT_Error error; |
|
711 FT_Size size; |
|
712 FT_Face face; |
|
713 |
|
714 |
|
715 scaler.face_id = font->face_id; |
|
716 scaler.width = font->pix_width; |
|
717 scaler.height = font->pix_height; |
|
718 scaler.pixel = TRUE; |
|
719 scaler.x_res = 0; |
|
720 scaler.y_res = 0; |
|
721 |
|
722 error = FTC_Manager_LookupSize( manager, &scaler, &size ); |
|
723 if ( error ) |
|
724 { |
|
725 face = NULL; |
|
726 size = NULL; |
|
727 } |
|
728 else |
|
729 face = size->face; |
|
730 |
|
731 if ( aface ) |
|
732 *aface = face; |
|
733 |
|
734 if ( asize ) |
|
735 *asize = size; |
|
736 |
|
737 return error; |
|
738 } |
|
739 |
|
740 #endif /* FT_CONFIG_OPTION_OLD_INTERNALS */ |
|
741 |
|
742 |
|
743 /* END */ |
|