1 | /***************************************************************************/
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2 | /* */
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3 | /* ftcimage.h */
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4 | /* */
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5 | /* FreeType Generic Image cache (specification) */
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6 | /* */
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7 | /* Copyright 2000-2001, 2002, 2003 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 | /*
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20 | * FTC_ICache is an _abstract_ cache used to store a single FT_Glyph
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21 | * image per cache node.
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22 | *
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23 | * FTC_ICache extends FTC_GCache. For an implementation example,
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24 | * see FTC_ImageCache in `src/cache/ftbasic.c'.
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25 | */
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26 |
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27 |
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28 | /*************************************************************************/
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29 | /* */
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30 | /* Each image cache really manages FT_Glyph objects. */
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31 | /* */
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32 | /*************************************************************************/
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33 |
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34 |
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35 | #ifndef __FTCIMAGE_H__
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36 | #define __FTCIMAGE_H__
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37 |
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38 |
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39 | #include <ft2build.h>
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40 | #include FT_CACHE_H
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41 | #include FT_CACHE_INTERNAL_GLYPH_H
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42 |
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43 | FT_BEGIN_HEADER
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44 |
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45 |
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46 | /* the FT_Glyph image node type - we store only 1 glyph per node */
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47 | typedef struct FTC_INodeRec_
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48 | {
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49 | FTC_GNodeRec gnode;
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50 | FT_Glyph glyph;
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51 |
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52 | } FTC_INodeRec, *FTC_INode;
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53 |
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54 | #define FTC_INODE( x ) ( (FTC_INode)( x ) )
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55 | #define FTC_INODE_GINDEX( x ) FTC_GNODE(x)->gindex
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56 | #define FTC_INODE_FAMILY( x ) FTC_GNODE(x)->family
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57 |
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58 | typedef FT_Error
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59 | (*FTC_IFamily_LoadGlyphFunc)( FTC_Family family,
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60 | FT_UInt gindex,
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61 | FTC_Cache cache,
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62 | FT_Glyph *aglyph );
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63 |
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64 | typedef struct FTC_IFamilyClassRec_
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65 | {
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66 | FTC_MruListClassRec clazz;
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67 | FTC_IFamily_LoadGlyphFunc family_load_glyph;
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68 |
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69 | } FTC_IFamilyClassRec;
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70 |
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71 | typedef const FTC_IFamilyClassRec* FTC_IFamilyClass;
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72 |
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73 | #define FTC_IFAMILY_CLASS( x ) ((FTC_IFamilyClass)(x))
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74 |
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75 | #define FTC_CACHE__IFAMILY_CLASS( x ) \
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76 | FTC_IFAMILY_CLASS( FTC_CACHE__GCACHE_CLASS(x)->family_class )
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77 |
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78 |
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79 | /* can be used as a @FTC_Node_FreeFunc */
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80 | FT_EXPORT( void )
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81 | FTC_INode_Free( FTC_INode inode,
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82 | FTC_Cache cache );
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83 |
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84 | /* Can be used as @FTC_Node_NewFunc. `gquery.index' and `gquery.family'
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85 | * must be set correctly. This function will call the `family_load_glyph'
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86 | * method to load the FT_Glyph into the cache node.
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87 | */
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88 | FT_EXPORT( FT_Error )
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89 | FTC_INode_New( FTC_INode *pinode,
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90 | FTC_GQuery gquery,
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91 | FTC_Cache cache );
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92 |
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93 | /* can be used as @FTC_Node_WeightFunc */
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94 | FT_EXPORT( FT_ULong )
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95 | FTC_INode_Weight( FTC_INode inode );
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96 |
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97 | /* */
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98 |
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99 | FT_END_HEADER
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100 |
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101 | #endif /* __FTCIMAGE_H__ */
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102 |
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103 |
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104 | /* END */
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