libass/ass_cache_template.h

   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 BITMAPHASHKEY(member) \
  10         BitmapHashKey member;
  11 #define END(typedefnamename) \
  12     } typedefnamename;
  13
  14 #elif defined(CREATE_COMPARISON_FUNCTIONS)
  15 #undef CREATE_COMPARISON_FUNCTIONS
  16 #define START(funcname, structname) \
  17     static int funcname##_compare(void *key1, void *key2, size_t key_size) \
  18     { \
  19         struct structname *a = key1; \
  20         struct structname *b = key2; \
  21         return // conditions follow
  22 #define GENERIC(type, member) \
  23             a->member == b->member &&
  24 #define FTVECTOR(member) \
  25             a->member.x == b->member.x && a->member.y == b->member.y &&
  26 #define BITMAPHASHKEY(member) \
  27             bitmap_compare(&a->member, &b->member, sizeof(a->member)) &&
  28 #define END(typedefname) \
  29             1; \
  30     }
  31
  32 #elif defined(CREATE_HASH_FUNCTIONS)
  33 #undef CREATE_HASH_FUNCTIONS
  34 #define START(funcname, structname) \
  35     static unsigned funcname##_hash(void *buf, size_t len) \
  36     { \
  37         struct structname *p = buf; \
  38         unsigned hval = FNV1_32A_INIT;
  39 #define GENERIC(type, member) \
  40         hval = fnv_32a_buf(&p->member, sizeof(p->member), hval);
  41 #define FTVECTOR(member) GENERIC(, member.x); GENERIC(, member.y);
  42 #define BITMAPHASHKEY(member) { \
  43         unsigned temp = bitmap_hash(&p->member, sizeof(p->member)); \
  44         hval = fnv_32a_buf(&temp, sizeof(temp), hval); \
  45         }
  46 #define END(typedefname) \
  47         return hval; \
  48     }
  49
  50 #else
  51 #error missing defines
  52 #endif
  53
  54
  55
  56 // describes a bitmap; bitmaps with equivalents structs are considered identical
  57 START(bitmap, bitmap_hash_key)
  58     GENERIC(char, bitmap) // bool : true = bitmap, false = outline
  59     GENERIC(ASS_Font *, font)
  60     GENERIC(double, size) // font size
  61     GENERIC(uint32_t, ch) // character code
  62     FTVECTOR(outline) // border width, 16.16 fixed point value
  63     GENERIC(int, bold)
  64     GENERIC(int, italic)
  65     GENERIC(char, be) // blur edges
  66     GENERIC(double, blur) // gaussian blur
  67     GENERIC(unsigned, scale_x) // 16.16
  68     GENERIC(unsigned, scale_y) // 16.16
  69     GENERIC(int, frx) // signed 16.16
  70     GENERIC(int, fry) // signed 16.16
  71     GENERIC(int, frz) // signed 16.16
  72     GENERIC(int, fax) // signed 16.16
  73     GENERIC(int, fay) // signed 16.16
  74     // shift vector that was added to glyph before applying rotation
  75     // = 0, if frx = fry = frx = 0
  76     // = (glyph base point) - (rotation origin), otherwise
  77     GENERIC(int, shift_x)
  78     GENERIC(int, shift_y)
  79     FTVECTOR(advance) // subpixel shift vector
  80     FTVECTOR(shadow_offset) // shadow subpixel shift
  81     GENERIC(unsigned, drawing_hash) // hashcode of a drawing
  82     GENERIC(unsigned, flags)    // glyph decoration
  83     GENERIC(unsigned, border_style)
  84 END(BitmapHashKey)
  85
  86 // describes an outline glyph
  87 START(glyph, glyph_hash_key)
  88     GENERIC(ASS_Font *, font)
  89     GENERIC(double, size) // font size
  90     GENERIC(uint32_t, ch) // character code
  91     GENERIC(int, bold)
  92     GENERIC(int, italic)
  93     GENERIC(unsigned, scale_x) // 16.16
  94     GENERIC(unsigned, scale_y) // 16.16
  95     FTVECTOR(outline) // border width, 16.16
  96     GENERIC(unsigned, drawing_hash) // hashcode of a drawing
  97     GENERIC(unsigned, flags)    // glyph decoration flags
  98     GENERIC(unsigned, border_style)
  99 END(GlyphHashKey)
 100
 101 // Cache for composited bitmaps
 102 START(composite, composite_hash_key)
 103     GENERIC(int, aw)
 104     GENERIC(int, ah)
 105     GENERIC(int, bw)
 106     GENERIC(int, bh)
 107     GENERIC(int, ax)
 108     GENERIC(int, ay)
 109     GENERIC(int, bx)
 110     GENERIC(int, by)
 111     GENERIC(int, as)
 112     GENERIC(int, bs)
 113     GENERIC(unsigned char *, a)
 114     GENERIC(unsigned char *, b)
 115 END(CompositeHashKey)
 116
 117
 118 #undef START
 119 #undef GENERIC
 120 #undef FTVECTOR
 121 #undef BITMAPHASHKEY
 122 #undef END