libass/ass_cache_template.c

   1 #ifdef CREATE_STRUCT_DEFINITIONS
   2 #undef CREATE_STRUCT_DEFINITIONS
   3 #define START(funcname, structname) \
   4     typedef struct structname {
   5 #define GENERIC(type, member) \
   6         type member;
   7 #define FTVECTOR(member) \
   8         FT_Vector member;
   9 #define END(typedefnamename) \
  10     } typedefnamename;
  11
  12 #elif defined(CREATE_COMPARISON_FUNCTIONS)
  13 #undef CREATE_COMPARISON_FUNCTIONS
  14 #define START(funcname, structname) \
  15     static int funcname##_compare(void *key1, void *key2, size_t key_size) \
  16     { \
  17         struct structname *a = key1; \
  18         struct structname *b = key2; \
  19         return // conditions follow
  20 #define GENERIC(type, member) \
  21             a->member == b->member &&
  22 #define FTVECTOR(member) \
  23             a->member.x == b->member.x && a->member.y == b->member.y &&
  24 #define END(typedefname) \
  25             1; \
  26     }
  27
  28 #elif defined(CREATE_HASH_FUNCTIONS)
  29 #undef CREATE_HASH_FUNCTIONS
  30 #define START(funcname, structname) \
  31     static unsigned funcname##_hash(void *buf, size_t len) \
  32     { \
  33         struct structname *p = buf; \
  34         unsigned hval = FNV1_32A_INIT;
  35 #define GENERIC(type, member) \
  36         hval = fnv_32a_buf(&p->member, sizeof(p->member), hval);
  37 #define FTVECTOR(member) GENERIC(, member.x); GENERIC(, member.y);
  38 #define END(typedefname) \
  39         return hval; \
  40     }
  41
  42 #else
  43 #error missing defines
  44 #endif
  45
  46
  47
  48 // describes a bitmap; bitmaps with equivalents structs are considered identical
  49 START(bitmap, bipmap_hash_key_s)
  50     GENERIC(char, bitmap) // bool : true = bitmap, false = outline
  51     GENERIC(ass_font_t *, font)
  52     GENERIC(double, size) // font size
  53     GENERIC(uint32_t, ch) // character code
  54     GENERIC(unsigned, outline) // border width, 16.16 fixed point value
  55     GENERIC(int, bold)
  56     GENERIC(int, italic)
  57     GENERIC(char, be) // blur edges
  58     GENERIC(unsigned, scale_x) // 16.16
  59     GENERIC(unsigned, scale_y) // 16.16
  60     GENERIC(int, frx) // signed 16.16
  61     GENERIC(int, fry) // signed 16.16
  62     GENERIC(int, frz) // signed 16.16
  63     // shift vector that was added to glyph before applying rotation
  64     // = 0, if frx = fry = frx = 0
  65     // = (glyph base point) - (rotation origin), otherwise
  66     GENERIC(int, shift_x)
  67     GENERIC(int, shift_y)
  68     FTVECTOR(advance) // subpixel shift vector
  69 END(bitmap_hash_key_t)
  70
  71 // describes an outline glyph
  72 START(glyph, glyph_hash_key_s)
  73     GENERIC(ass_font_t *, font)
  74     GENERIC(double, size) // font size
  75     GENERIC(uint32_t, ch) // character code
  76     GENERIC(int, bold)
  77     GENERIC(int, italic)
  78     GENERIC(unsigned, scale_x) // 16.16
  79     GENERIC(unsigned, scale_y) // 16.16
  80     FTVECTOR(advance) // subpixel shift vector
  81     GENERIC(unsigned, outline) // border width, 16.16
  82 END(glyph_hash_key_t)
  83
  84 #undef START
  85 #undef GENERIC
  86 #undef FTVECTOR
  87 #undef END