1 /***************************************************************************/ |
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2 /* */ |
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3 /* ftpfr.c */ |
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4 /* */ |
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5 /* FreeType API for accessing PFR-specific data (body). */ |
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6 /* */ |
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7 /* Copyright 2002, 2003, 2004, 2008, 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 #include <ft2build.h> |
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19 #include FT_INTERNAL_OBJECTS_H |
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20 #include FT_SERVICE_PFR_H |
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21 |
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22 |
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23 /* check the format */ |
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24 static FT_Service_PfrMetrics |
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25 ft_pfr_check( FT_Face face ) |
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26 { |
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27 FT_Service_PfrMetrics service = NULL; |
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28 |
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29 |
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30 if ( face ) |
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31 FT_FACE_LOOKUP_SERVICE( face, service, PFR_METRICS ); |
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32 |
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33 return service; |
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34 } |
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35 |
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36 |
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37 /* documentation is in ftpfr.h */ |
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38 |
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39 FT_EXPORT_DEF( FT_Error ) |
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40 FT_Get_PFR_Metrics( FT_Face face, |
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41 FT_UInt *aoutline_resolution, |
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42 FT_UInt *ametrics_resolution, |
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43 FT_Fixed *ametrics_x_scale, |
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44 FT_Fixed *ametrics_y_scale ) |
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45 { |
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46 FT_Error error = FT_Err_Ok; |
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47 FT_Service_PfrMetrics service; |
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48 |
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49 |
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50 if ( !face ) |
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51 return FT_Err_Invalid_Argument; |
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52 |
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53 service = ft_pfr_check( face ); |
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54 if ( service ) |
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55 { |
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56 error = service->get_metrics( face, |
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57 aoutline_resolution, |
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58 ametrics_resolution, |
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59 ametrics_x_scale, |
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60 ametrics_y_scale ); |
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61 } |
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62 else |
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63 { |
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64 FT_Fixed x_scale, y_scale; |
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65 |
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66 |
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67 /* this is not a PFR font */ |
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68 if ( aoutline_resolution ) |
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69 *aoutline_resolution = face->units_per_EM; |
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70 |
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71 if ( ametrics_resolution ) |
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72 *ametrics_resolution = face->units_per_EM; |
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73 |
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74 x_scale = y_scale = 0x10000L; |
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75 if ( face->size ) |
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76 { |
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77 x_scale = face->size->metrics.x_scale; |
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78 y_scale = face->size->metrics.y_scale; |
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79 } |
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80 |
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81 if ( ametrics_x_scale ) |
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82 *ametrics_x_scale = x_scale; |
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83 |
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84 if ( ametrics_y_scale ) |
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85 *ametrics_y_scale = y_scale; |
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86 |
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87 error = FT_Err_Unknown_File_Format; |
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88 } |
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89 |
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90 return error; |
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91 } |
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92 |
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93 |
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94 /* documentation is in ftpfr.h */ |
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95 |
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96 FT_EXPORT_DEF( FT_Error ) |
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97 FT_Get_PFR_Kerning( FT_Face face, |
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98 FT_UInt left, |
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99 FT_UInt right, |
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100 FT_Vector *avector ) |
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101 { |
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102 FT_Error error; |
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103 FT_Service_PfrMetrics service; |
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104 |
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105 |
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106 if ( !face ) |
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107 return FT_Err_Invalid_Argument; |
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108 |
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109 service = ft_pfr_check( face ); |
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110 if ( service ) |
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111 error = service->get_kerning( face, left, right, avector ); |
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112 else |
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113 error = FT_Get_Kerning( face, left, right, |
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114 FT_KERNING_UNSCALED, avector ); |
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115 |
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116 return error; |
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117 } |
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118 |
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119 |
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120 /* documentation is in ftpfr.h */ |
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121 |
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122 FT_EXPORT_DEF( FT_Error ) |
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123 FT_Get_PFR_Advance( FT_Face face, |
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124 FT_UInt gindex, |
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125 FT_Pos *aadvance ) |
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126 { |
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127 FT_Error error; |
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128 FT_Service_PfrMetrics service; |
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129 |
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130 |
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131 service = ft_pfr_check( face ); |
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132 if ( service ) |
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133 { |
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134 error = service->get_advance( face, gindex, aadvance ); |
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135 } |
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136 else |
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137 /* XXX: TODO: PROVIDE ADVANCE-LOADING METHOD TO ALL FONT DRIVERS */ |
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138 error = FT_Err_Invalid_Argument; |
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139 |
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140 return error; |
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141 } |
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142 |
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143 |
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144 /* END */ |
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