1 files changed, 122 insertions, 0 deletions
diff --git a/libass/ass_cache_template.h b/libass/ass_cache_template.h
new file mode 100644
index 0000000000..f335c6b27a
--- /dev/null
+++ b/libass/ass_cache_template.h
@@ -0,0 +1,122 @@
+#ifdef CREATE_STRUCT_DEFINITIONS
+#undef CREATE_STRUCT_DEFINITIONS
+#define START(funcname, structname) \
+    typedef struct structname {
+#define GENERIC(type, member) \
+        type member;
+#define FTVECTOR(member) \
+        FT_Vector member;
+#define BITMAPHASHKEY(member) \
+        BitmapHashKey member;
+#define END(typedefnamename) \
+    } typedefnamename;
+
+#elif defined(CREATE_COMPARISON_FUNCTIONS)
+#undef CREATE_COMPARISON_FUNCTIONS
+#define START(funcname, structname) \
+    static int funcname##_compare(void *key1, void *key2, size_t key_size) \
+    { \
+        struct structname *a = key1; \
+        struct structname *b = key2; \
+        return // conditions follow
+#define GENERIC(type, member) \
+            a->member == b->member &&
+#define FTVECTOR(member) \
+            a->member.x == b->member.x && a->member.y == b->member.y &&
+#define BITMAPHASHKEY(member) \
+            bitmap_compare(&a->member, &b->member, sizeof(a->member)) &&
+#define END(typedefname) \
+            1; \
+    }
+
+#elif defined(CREATE_HASH_FUNCTIONS)
+#undef CREATE_HASH_FUNCTIONS
+#define START(funcname, structname) \
+    static unsigned funcname##_hash(void *buf, size_t len) \
+    { \
+        struct structname *p = buf; \
+        unsigned hval = FNV1_32A_INIT;
+#define GENERIC(type, member) \
+        hval = fnv_32a_buf(&p->member, sizeof(p->member), hval);
+#define FTVECTOR(member) GENERIC(, member.x); GENERIC(, member.y);
+#define BITMAPHASHKEY(member) { \
+        unsigned temp = bitmap_hash(&p->member, sizeof(p->member)); \
+        hval = fnv_32a_buf(&temp, sizeof(temp), hval); \
+        }
+#define END(typedefname) \
+        return hval; \
+    }
+
+#else
+#error missing defines
+#endif
+
+
+
+// describes a bitmap; bitmaps with equivalents structs are considered identical
+START(bitmap, bitmap_hash_key)
+    GENERIC(char, bitmap) // bool : true = bitmap, false = outline
+    GENERIC(ASS_Font *, font)
+    GENERIC(double, size) // font size
+    GENERIC(uint32_t, ch) // character code
+    FTVECTOR(outline) // border width, 16.16 fixed point value
+    GENERIC(int, bold)
+    GENERIC(int, italic)
+    GENERIC(char, be) // blur edges
+    GENERIC(double, blur) // gaussian blur
+    GENERIC(unsigned, scale_x) // 16.16
+    GENERIC(unsigned, scale_y) // 16.16
+    GENERIC(int, frx) // signed 16.16
+    GENERIC(int, fry) // signed 16.16
+    GENERIC(int, frz) // signed 16.16
+    GENERIC(int, fax) // signed 16.16
+    GENERIC(int, fay) // signed 16.16
+    // shift vector that was added to glyph before applying rotation
+    // = 0, if frx = fry = frx = 0
+    // = (glyph base point) - (rotation origin), otherwise
+    GENERIC(int, shift_x)
+    GENERIC(int, shift_y)
+    FTVECTOR(advance) // subpixel shift vector
+    FTVECTOR(shadow_offset) // shadow subpixel shift
+    GENERIC(unsigned, drawing_hash) // hashcode of a drawing
+    GENERIC(unsigned, flags)    // glyph decoration
+    GENERIC(unsigned, border_style)
+END(BitmapHashKey)
+
+// describes an outline glyph
+START(glyph, glyph_hash_key)
+    GENERIC(ASS_Font *, font)
+    GENERIC(double, size) // font size
+    GENERIC(uint32_t, ch) // character code
+    GENERIC(int, bold)
+    GENERIC(int, italic)
+    GENERIC(unsigned, scale_x) // 16.16
+    GENERIC(unsigned, scale_y) // 16.16
+    FTVECTOR(outline) // border width, 16.16
+    GENERIC(unsigned, drawing_hash) // hashcode of a drawing
+    GENERIC(unsigned, flags)    // glyph decoration flags
+    GENERIC(unsigned, border_style)
+END(GlyphHashKey)
+
+// Cache for composited bitmaps
+START(composite, composite_hash_key)
+    GENERIC(int, aw)
+    GENERIC(int, ah)
+    GENERIC(int, bw)
+    GENERIC(int, bh)
+    GENERIC(int, ax)
+    GENERIC(int, ay)
+    GENERIC(int, bx)
+    GENERIC(int, by)
+    GENERIC(int, as)
+    GENERIC(int, bs)
+    GENERIC(unsigned char *, a)
+    GENERIC(unsigned char *, b)
+END(CompositeHashKey)
+
+
+#undef START
+#undef GENERIC
+#undef FTVECTOR
+#undef BITMAPHASHKEY
+#undef END