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 STRING(member) \
   8         char *member;
   9 #define FTVECTOR(member) \
  10         FT_Vector member;
  11 #define BITMAPHASHKEY(member) \
  12         BitmapHashKey member;
  13 #define END(typedefnamename) \
  14     } typedefnamename;
  15
  16 #elif defined(CREATE_COMPARISON_FUNCTIONS)
  17 #undef CREATE_COMPARISON_FUNCTIONS
  18 #define START(funcname, structname) \
  19     static unsigned funcname##_compare(void *key1, void *key2, size_t key_size) \
  20     { \
  21         struct structname *a = key1; \
  22         struct structname *b = key2; \
  23         return // conditions follow
  24 #define GENERIC(type, member) \
  25             a->member == b->member &&
  26 #define STRING(member) \
  27             strcmp(a->member, b->member) == 0 &&
  28 #define FTVECTOR(member) \
  29             a->member.x == b->member.x && a->member.y == b->member.y &&
  30 #define BITMAPHASHKEY(member) \
  31             bitmap_compare(&a->member, &b->member, sizeof(a->member)) &&
  32 #define END(typedefname) \
  33             1; \
  34     }
  35
  36 #elif defined(CREATE_HASH_FUNCTIONS)
  37 #undef CREATE_HASH_FUNCTIONS
  38 #define START(funcname, structname) \
  39     static unsigned funcname##_hash(void *buf, size_t len) \
  40     { \
  41         struct structname *p = buf; \
  42         unsigned hval = FNV1_32A_INIT;
  43 #define GENERIC(type, member) \
  44         hval = fnv_32a_buf(&p->member, sizeof(p->member), hval);
  45 #define STRING(member) \
  46         hval = fnv_32a_str(p->member, hval);
  47 #define FTVECTOR(member) GENERIC(, member.x); GENERIC(, member.y);
  48 #define BITMAPHASHKEY(member) { \
  49         unsigned temp = bitmap_hash(&p->member, sizeof(p->member)); \
  50         hval = fnv_32a_buf(&temp, sizeof(temp), hval); \
  51         }
  52 #define END(typedefname) \
  53         return hval; \
  54     }
  55
  56 #else
  57 #error missing defines
  58 #endif
  59
  60
  61
  62 // describes a bitmap; bitmaps with equivalents structs are considered identical
  63 START(bitmap, bitmap_hash_key)
  64     GENERIC(char, bitmap) // bool : true = bitmap, false = outline
  65     GENERIC(ASS_Font *, font)
  66     GENERIC(double, size) // font size
  67     GENERIC(uint32_t, ch) // character code
  68     FTVECTOR(outline) // border width, 16.16 fixed point value
  69     GENERIC(int, bold)
  70     GENERIC(int, italic)
  71     GENERIC(char, be) // blur edges
  72     GENERIC(double, blur) // gaussian blur
  73     GENERIC(unsigned, scale_x) // 16.16
  74     GENERIC(unsigned, scale_y) // 16.16
  75     GENERIC(int, frx) // signed 16.16
  76     GENERIC(int, fry) // signed 16.16
  77     GENERIC(int, frz) // signed 16.16
  78     GENERIC(int, fax) // signed 16.16
  79     GENERIC(int, fay) // signed 16.16
  80     // shift vector that was added to glyph before applying rotation
  81     // = 0, if frx = fry = frx = 0
  82     // = (glyph base point) - (rotation origin), otherwise
  83     GENERIC(int, shift_x)
  84     GENERIC(int, shift_y)
  85     FTVECTOR(advance) // subpixel shift vector
  86     FTVECTOR(shadow_offset) // shadow subpixel shift
  87     GENERIC(unsigned, drawing_hash) // hashcode of a drawing
  88     GENERIC(unsigned, flags)    // glyph decoration
  89     GENERIC(unsigned, border_style)
  90 END(BitmapHashKey)
  91
  92 // describes an outline glyph
  93 START(glyph, glyph_hash_key)
  94     GENERIC(ASS_Font *, font)
  95     GENERIC(double, size) // font size
  96     GENERIC(uint32_t, ch) // character code
  97     GENERIC(int, bold)
  98     GENERIC(int, italic)
  99     GENERIC(unsigned, scale_x) // 16.16
 100     GENERIC(unsigned, scale_y) // 16.16
 101     FTVECTOR(outline) // border width, 16.16
 102     GENERIC(unsigned, drawing_hash) // hashcode of a drawing
 103     GENERIC(unsigned, flags)    // glyph decoration flags
 104     GENERIC(unsigned, border_style)
 105 END(GlyphHashKey)
 106
 107 // describes an outline drawing
 108 START(drawing, drawing_hash_key)
 109     GENERIC(unsigned, scale_x)
 110     GENERIC(unsigned, scale_y)
 111     GENERIC(int, pbo)
 112     FTVECTOR(outline)
 113     GENERIC(unsigned, border_style)
 114     GENERIC(int, scale)
 115     GENERIC(unsigned, hash)
 116     STRING(text)
 117 END(DrawingHashKey)
 118
 119 // Cache for composited bitmaps
 120 START(composite, composite_hash_key)
 121     GENERIC(int, aw)
 122     GENERIC(int, ah)
 123     GENERIC(int, bw)
 124     GENERIC(int, bh)
 125     GENERIC(int, ax)
 126     GENERIC(int, ay)
 127     GENERIC(int, bx)
 128     GENERIC(int, by)
 129     GENERIC(int, as)
 130     GENERIC(int, bs)
 131     GENERIC(unsigned char *, a)
 132     GENERIC(unsigned char *, b)
 133 END(CompositeHashKey)
 134
 135
 136 #undef START
 137 #undef GENERIC
 138 #undef STRING
 139 #undef FTVECTOR
 140 #undef BITMAPHASHKEY
 141 #undef END