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@antigrain.com
13 // mcseemagg@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
44 #include "core/fxcrt/fx_system.h"
45
46 namespace agg
47 {
48 typedef AGG_INT8 int8;
49 typedef AGG_INT8U int8u;
50 typedef AGG_INT16 int16;
51 typedef AGG_INT16U int16u;
52 typedef AGG_INT32 int32;
53 typedef AGG_INT32U int32u;
54 typedef AGG_INT64 int64;
55 typedef AGG_INT64U int64u;
56 typedef unsigned char cover_type;
57 enum cover_scale_e {
58 cover_shift = 8,
59 cover_size = 1 << cover_shift,
60 cover_mask = cover_size - 1,
61 cover_none = 0,
62 cover_full = cover_mask
63 };
64 template<class T> struct rect_base {
65 typedef rect_base<T> self_type;
66 T x1;
67 T y1;
68 T x2;
69 T y2;
rect_baserect_base70 rect_base() {}
rect_baserect_base71 rect_base(T x1_, T y1_, T x2_, T y2_) :
72 x1(x1_), y1(y1_), x2(x2_), y2(y2_) {}
normalizerect_base73 const self_type& normalize()
74 {
75 T t;
76 if(x1 > x2) {
77 t = x1;
78 x1 = x2;
79 x2 = t;
80 }
81 if(y1 > y2) {
82 t = y1;
83 y1 = y2;
84 y2 = t;
85 }
86 return *this;
87 }
cliprect_base88 bool clip(const self_type& r)
89 {
90 if(x2 > r.x2) {
91 x2 = r.x2;
92 }
93 if(y2 > r.y2) {
94 y2 = r.y2;
95 }
96 if(x1 < r.x1) {
97 x1 = r.x1;
98 }
99 if(y1 < r.y1) {
100 y1 = r.y1;
101 }
102 return x1 <= x2 && y1 <= y2;
103 }
is_validrect_base104 bool is_valid() const
105 {
106 return x1 <= x2 && y1 <= y2;
107 }
108 };
109 template<class Rect>
intersect_rectangles(const Rect & r1,const Rect & r2)110 inline Rect intersect_rectangles(const Rect& r1, const Rect& r2)
111 {
112 Rect r = r1;
113 if(r.x2 > r2.x2) {
114 r.x2 = r2.x2;
115 }
116 if(r.y2 > r2.y2) {
117 r.y2 = r2.y2;
118 }
119 if(r.x1 < r2.x1) {
120 r.x1 = r2.x1;
121 }
122 if(r.y1 < r2.y1) {
123 r.y1 = r2.y1;
124 }
125 return r;
126 }
127 template<class Rect>
unite_rectangles(const Rect & r1,const Rect & r2)128 inline Rect unite_rectangles(const Rect& r1, const Rect& r2)
129 {
130 Rect r = r1;
131 if(r.x2 < r2.x2) {
132 r.x2 = r2.x2;
133 }
134 if(r.y2 < r2.y2) {
135 r.y2 = r2.y2;
136 }
137 if(r.x1 > r2.x1) {
138 r.x1 = r2.x1;
139 }
140 if(r.y1 > r2.y1) {
141 r.y1 = r2.y1;
142 }
143 return r;
144 }
145 typedef rect_base<int> rect;
146 typedef rect_base<float> rect_d;
147 enum path_commands_e {
148 path_cmd_stop = 0,
149 path_cmd_move_to = 1,
150 path_cmd_line_to = 2,
151 path_cmd_curve3 = 3,
152 path_cmd_curve4 = 4,
153 path_cmd_curveN = 5,
154 path_cmd_catrom = 6,
155 path_cmd_ubspline = 7,
156 path_cmd_end_poly = 0x0F,
157 path_cmd_mask = 0x0F
158 };
159 enum path_flags_e {
160 path_flags_none = 0,
161 path_flags_ccw = 0x10,
162 path_flags_cw = 0x20,
163 path_flags_close = 0x40,
164 path_flags_jr = 0x80,
165 path_flags_mask = 0xF0
166 };
is_vertex(unsigned c)167 inline bool is_vertex(unsigned c)
168 {
169 c &= ~path_flags_jr;
170 return c >= path_cmd_move_to && c < path_cmd_end_poly;
171 }
is_drawing(unsigned c)172 inline bool is_drawing(unsigned c)
173 {
174 c &= ~path_flags_jr;
175 return c >= path_cmd_line_to && c < path_cmd_end_poly;
176 }
is_stop(unsigned c)177 inline bool is_stop(unsigned c)
178 {
179 c &= ~path_flags_jr;
180 return c == path_cmd_stop;
181 }
is_move_to(unsigned c)182 inline bool is_move_to(unsigned c)
183 {
184 c &= ~path_flags_jr;
185 return c == path_cmd_move_to;
186 }
is_line_to(unsigned c)187 inline bool is_line_to(unsigned c)
188 {
189 c &= ~path_flags_jr;
190 return c == path_cmd_line_to;
191 }
is_curve(unsigned c)192 inline bool is_curve(unsigned c)
193 {
194 c &= ~path_flags_jr;
195 return c == path_cmd_curve3 || c == path_cmd_curve4;
196 }
is_curve3(unsigned c)197 inline bool is_curve3(unsigned c)
198 {
199 c &= ~path_flags_jr;
200 return c == path_cmd_curve3;
201 }
is_curve4(unsigned c)202 inline bool is_curve4(unsigned c)
203 {
204 c &= ~path_flags_jr;
205 return c == path_cmd_curve4;
206 }
is_end_poly(unsigned c)207 inline bool is_end_poly(unsigned c)
208 {
209 c &= ~path_flags_jr;
210 return (c & path_cmd_mask) == path_cmd_end_poly;
211 }
is_close(unsigned c)212 inline bool is_close(unsigned c)
213 {
214 c &= ~path_flags_jr;
215 return (c & ~(path_flags_cw | path_flags_ccw)) ==
216 (path_cmd_end_poly | path_flags_close);
217 }
is_next_poly(unsigned c)218 inline bool is_next_poly(unsigned c)
219 {
220 c &= ~path_flags_jr;
221 return is_stop(c) || is_move_to(c) || is_end_poly(c);
222 }
is_cw(unsigned c)223 inline bool is_cw(unsigned c)
224 {
225 c &= ~path_flags_jr;
226 return (c & path_flags_cw) != 0;
227 }
is_ccw(unsigned c)228 inline bool is_ccw(unsigned c)
229 {
230 c &= ~path_flags_jr;
231 return (c & path_flags_ccw) != 0;
232 }
is_oriented(unsigned c)233 inline bool is_oriented(unsigned c)
234 {
235 c &= ~path_flags_jr;
236 return (c & (path_flags_cw | path_flags_ccw)) != 0;
237 }
is_closed(unsigned c)238 inline bool is_closed(unsigned c)
239 {
240 c &= ~path_flags_jr;
241 return (c & path_flags_close) != 0;
242 }
get_close_flag(unsigned c)243 inline unsigned get_close_flag(unsigned c)
244 {
245 c &= ~path_flags_jr;
246 return c & path_flags_close;
247 }
clear_orientation(unsigned c)248 inline unsigned clear_orientation(unsigned c)
249 {
250 c &= ~path_flags_jr;
251 return c & ~(path_flags_cw | path_flags_ccw);
252 }
get_orientation(unsigned c)253 inline unsigned get_orientation(unsigned c)
254 {
255 c &= ~path_flags_jr;
256 return c & (path_flags_cw | path_flags_ccw);
257 }
set_orientation(unsigned c,unsigned o)258 inline unsigned set_orientation(unsigned c, unsigned o)
259 {
260 c &= ~path_flags_jr;
261 return clear_orientation(c) | o;
262 }
263 struct point_type {
264 float x, y;
265 unsigned flag;
point_typepoint_type266 point_type() {}
xpoint_type267 point_type(float x_, float y_, unsigned flag_ = 0) : x(x_), y(y_), flag(flag_) {}
268 };
269 struct point_type_flag : public point_type {
270 unsigned flag;
point_type_flagpoint_type_flag271 point_type_flag()
272 {
273 flag = 0;
274 }
point_typepoint_type_flag275 point_type_flag(float x_, float y_, unsigned flag_ = 0) : point_type(x_, y_), flag(flag_) {}
276 };
277 struct vertex_type {
278 float x, y;
279 unsigned cmd;
vertex_typevertex_type280 vertex_type() {}
vertex_typevertex_type281 vertex_type(float x_, float y_, unsigned cmd_) :
282 x(x_), y(y_), cmd(cmd_) {}
283 };
284 }
285 #endif
286