1 2 //---------------------------------------------------------------------------- 3 // Anti-Grain Geometry - Version 2.3 4 // Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com) 5 // 6 // Permission to copy, use, modify, sell and distribute this software 7 // is granted provided this copyright notice appears in all copies. 8 // This software is provided "as is" without express or implied 9 // warranty, and with no claim as to its suitability for any purpose. 10 // 11 //---------------------------------------------------------------------------- 12 // Contact: mcseem (at) antigrain.com 13 // mcseemagg (at) yahoo.com 14 // http://www.antigrain.com 15 //---------------------------------------------------------------------------- 16 #ifndef AGG_BASICS_INCLUDED 17 #define AGG_BASICS_INCLUDED 18 #ifndef AGG_INT8 19 #define AGG_INT8 signed char 20 #endif 21 #ifndef AGG_INT8U 22 #define AGG_INT8U unsigned char 23 #endif 24 #ifndef AGG_INT16 25 #define AGG_INT16 short 26 #endif 27 #ifndef AGG_INT16U 28 #define AGG_INT16U unsigned short 29 #endif 30 #ifndef AGG_INT32 31 #define AGG_INT32 int 32 #endif 33 #ifndef AGG_INT32U 34 #define AGG_INT32U unsigned 35 #endif 36 #ifndef AGG_INT64 37 #define AGG_INT64 signed long long 38 #endif 39 #ifndef AGG_INT64U 40 #define AGG_INT64U unsigned long long 41 #endif 42 #define AGG_INLINE inline 43 namespace agg 44 { 45 typedef AGG_INT8 int8; 46 typedef AGG_INT8U int8u; 47 typedef AGG_INT16 int16; 48 typedef AGG_INT16U int16u; 49 typedef AGG_INT32 int32; 50 typedef AGG_INT32U int32u; 51 typedef AGG_INT64 int64; 52 typedef AGG_INT64U int64u; 53 typedef unsigned char cover_type; 54 enum cover_scale_e { 55 cover_shift = 8, 56 cover_size = 1 << cover_shift, 57 cover_mask = cover_size - 1, 58 cover_none = 0, 59 cover_full = cover_mask 60 }; 61 template<class T> struct rect_base { 62 typedef rect_base<T> self_type; 63 T x1; 64 T y1; 65 T x2; 66 T y2; 67 rect_base() {} 68 rect_base(T x1_, T y1_, T x2_, T y2_) : 69 x1(x1_), y1(y1_), x2(x2_), y2(y2_) {} 70 const self_type& normalize() 71 { 72 T t; 73 if(x1 > x2) { 74 t = x1; 75 x1 = x2; 76 x2 = t; 77 } 78 if(y1 > y2) { 79 t = y1; 80 y1 = y2; 81 y2 = t; 82 } 83 return *this; 84 } 85 bool clip(const self_type& r) 86 { 87 if(x2 > r.x2) { 88 x2 = r.x2; 89 } 90 if(y2 > r.y2) { 91 y2 = r.y2; 92 } 93 if(x1 < r.x1) { 94 x1 = r.x1; 95 } 96 if(y1 < r.y1) { 97 y1 = r.y1; 98 } 99 return x1 <= x2 && y1 <= y2; 100 } 101 bool is_valid() const 102 { 103 return x1 <= x2 && y1 <= y2; 104 } 105 }; 106 template<class Rect> 107 inline Rect intersect_rectangles(const Rect& r1, const Rect& r2) 108 { 109 Rect r = r1; 110 if(r.x2 > r2.x2) { 111 r.x2 = r2.x2; 112 } 113 if(r.y2 > r2.y2) { 114 r.y2 = r2.y2; 115 } 116 if(r.x1 < r2.x1) { 117 r.x1 = r2.x1; 118 } 119 if(r.y1 < r2.y1) { 120 r.y1 = r2.y1; 121 } 122 return r; 123 } 124 template<class Rect> 125 inline Rect unite_rectangles(const Rect& r1, const Rect& r2) 126 { 127 Rect r = r1; 128 if(r.x2 < r2.x2) { 129 r.x2 = r2.x2; 130 } 131 if(r.y2 < r2.y2) { 132 r.y2 = r2.y2; 133 } 134 if(r.x1 > r2.x1) { 135 r.x1 = r2.x1; 136 } 137 if(r.y1 > r2.y1) { 138 r.y1 = r2.y1; 139 } 140 return r; 141 } 142 typedef rect_base<int> rect; 143 typedef rect_base<FX_FLOAT> rect_d; 144 enum path_commands_e { 145 path_cmd_stop = 0, 146 path_cmd_move_to = 1, 147 path_cmd_line_to = 2, 148 path_cmd_curve3 = 3, 149 path_cmd_curve4 = 4, 150 path_cmd_curveN = 5, 151 path_cmd_catrom = 6, 152 path_cmd_ubspline = 7, 153 path_cmd_end_poly = 0x0F, 154 path_cmd_mask = 0x0F 155 }; 156 enum path_flags_e { 157 path_flags_none = 0, 158 path_flags_ccw = 0x10, 159 path_flags_cw = 0x20, 160 path_flags_close = 0x40, 161 path_flags_jr = 0x80, 162 path_flags_mask = 0xF0 163 }; 164 inline bool is_vertex(unsigned c) 165 { 166 c &= ~path_flags_jr; 167 return c >= path_cmd_move_to && c < path_cmd_end_poly; 168 } 169 inline bool is_drawing(unsigned c) 170 { 171 c &= ~path_flags_jr; 172 return c >= path_cmd_line_to && c < path_cmd_end_poly; 173 } 174 inline bool is_stop(unsigned c) 175 { 176 c &= ~path_flags_jr; 177 return c == path_cmd_stop; 178 } 179 inline bool is_move_to(unsigned c) 180 { 181 c &= ~path_flags_jr; 182 return c == path_cmd_move_to; 183 } 184 inline bool is_line_to(unsigned c) 185 { 186 c &= ~path_flags_jr; 187 return c == path_cmd_line_to; 188 } 189 inline bool is_curve(unsigned c) 190 { 191 c &= ~path_flags_jr; 192 return c == path_cmd_curve3 || c == path_cmd_curve4; 193 } 194 inline bool is_curve3(unsigned c) 195 { 196 c &= ~path_flags_jr; 197 return c == path_cmd_curve3; 198 } 199 inline bool is_curve4(unsigned c) 200 { 201 c &= ~path_flags_jr; 202 return c == path_cmd_curve4; 203 } 204 inline bool is_end_poly(unsigned c) 205 { 206 c &= ~path_flags_jr; 207 return (c & path_cmd_mask) == path_cmd_end_poly; 208 } 209 inline bool is_close(unsigned c) 210 { 211 c &= ~path_flags_jr; 212 return (c & ~(path_flags_cw | path_flags_ccw)) == 213 (path_cmd_end_poly | path_flags_close); 214 } 215 inline bool is_next_poly(unsigned c) 216 { 217 c &= ~path_flags_jr; 218 return is_stop(c) || is_move_to(c) || is_end_poly(c); 219 } 220 inline bool is_cw(unsigned c) 221 { 222 c &= ~path_flags_jr; 223 return (c & path_flags_cw) != 0; 224 } 225 inline bool is_ccw(unsigned c) 226 { 227 c &= ~path_flags_jr; 228 return (c & path_flags_ccw) != 0; 229 } 230 inline bool is_oriented(unsigned c) 231 { 232 c &= ~path_flags_jr; 233 return (c & (path_flags_cw | path_flags_ccw)) != 0; 234 } 235 inline bool is_closed(unsigned c) 236 { 237 c &= ~path_flags_jr; 238 return (c & path_flags_close) != 0; 239 } 240 inline unsigned get_close_flag(unsigned c) 241 { 242 c &= ~path_flags_jr; 243 return c & path_flags_close; 244 } 245 inline unsigned clear_orientation(unsigned c) 246 { 247 c &= ~path_flags_jr; 248 return c & ~(path_flags_cw | path_flags_ccw); 249 } 250 inline unsigned get_orientation(unsigned c) 251 { 252 c &= ~path_flags_jr; 253 return c & (path_flags_cw | path_flags_ccw); 254 } 255 inline unsigned set_orientation(unsigned c, unsigned o) 256 { 257 c &= ~path_flags_jr; 258 return clear_orientation(c) | o; 259 } 260 struct point_type { 261 FX_FLOAT x, y; 262 unsigned flag; 263 point_type() {} 264 point_type(FX_FLOAT x_, FX_FLOAT y_, unsigned flag_ = 0) : x(x_), y(y_), flag(flag_) {} 265 }; 266 struct point_type_flag : public point_type { 267 unsigned flag; 268 point_type_flag() 269 { 270 flag = 0; 271 } 272 point_type_flag(FX_FLOAT x_, FX_FLOAT y_, unsigned flag_ = 0) : point_type(x_, y_), flag(flag_) {} 273 }; 274 struct vertex_type { 275 FX_FLOAT x, y; 276 unsigned cmd; 277 vertex_type() {} 278 vertex_type(FX_FLOAT x_, FX_FLOAT y_, unsigned cmd_) : 279 x(x_), y(y_), cmd(cmd_) {} 280 }; 281 } 282 #endif 283
