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
43namespace agg
44{
45typedef AGG_INT8   int8;
46typedef AGG_INT8U  int8u;
47typedef AGG_INT16  int16;
48typedef AGG_INT16U int16u;
49typedef AGG_INT32  int32;
50typedef AGG_INT32U int32u;
51typedef AGG_INT64  int64;
52typedef AGG_INT64U int64u;
53typedef unsigned char cover_type;
54enum 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};
61template<class T> struct rect_base : public CFX_Object {
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};
106template<class Rect>
107inline 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}
124template<class Rect>
125inline 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}
142typedef rect_base<int>    rect;
143typedef rect_base<FX_FLOAT> rect_d;
144enum 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};
156enum 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};
164inline bool is_vertex(unsigned c)
165{
166    c &= ~path_flags_jr;
167    return c >= path_cmd_move_to && c < path_cmd_end_poly;
168}
169inline bool is_drawing(unsigned c)
170{
171    c &= ~path_flags_jr;
172    return c >= path_cmd_line_to && c < path_cmd_end_poly;
173}
174inline bool is_stop(unsigned c)
175{
176    c &= ~path_flags_jr;
177    return c == path_cmd_stop;
178}
179inline bool is_move_to(unsigned c)
180{
181    c &= ~path_flags_jr;
182    return c == path_cmd_move_to;
183}
184inline bool is_line_to(unsigned c)
185{
186    c &= ~path_flags_jr;
187    return c == path_cmd_line_to;
188}
189inline bool is_curve(unsigned c)
190{
191    c &= ~path_flags_jr;
192    return c == path_cmd_curve3 || c == path_cmd_curve4;
193}
194inline bool is_curve3(unsigned c)
195{
196    c &= ~path_flags_jr;
197    return c == path_cmd_curve3;
198}
199inline bool is_curve4(unsigned c)
200{
201    c &= ~path_flags_jr;
202    return c == path_cmd_curve4;
203}
204inline bool is_end_poly(unsigned c)
205{
206    c &= ~path_flags_jr;
207    return (c & path_cmd_mask) == path_cmd_end_poly;
208}
209inline 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}
215inline 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}
220inline bool is_cw(unsigned c)
221{
222    c &= ~path_flags_jr;
223    return (c & path_flags_cw) != 0;
224}
225inline bool is_ccw(unsigned c)
226{
227    c &= ~path_flags_jr;
228    return (c & path_flags_ccw) != 0;
229}
230inline bool is_oriented(unsigned c)
231{
232    c &= ~path_flags_jr;
233    return (c & (path_flags_cw | path_flags_ccw)) != 0;
234}
235inline bool is_closed(unsigned c)
236{
237    c &= ~path_flags_jr;
238    return (c & path_flags_close) != 0;
239}
240inline unsigned get_close_flag(unsigned c)
241{
242    c &= ~path_flags_jr;
243    return c & path_flags_close;
244}
245inline unsigned clear_orientation(unsigned c)
246{
247    c &= ~path_flags_jr;
248    return c & ~(path_flags_cw | path_flags_ccw);
249}
250inline unsigned get_orientation(unsigned c)
251{
252    c &= ~path_flags_jr;
253    return c & (path_flags_cw | path_flags_ccw);
254}
255inline unsigned set_orientation(unsigned c, unsigned o)
256{
257    c &= ~path_flags_jr;
258    return clear_orientation(c) | o;
259}
260struct point_type : public CFX_Object {
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};
266struct 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};
274struct vertex_type : public CFX_Object {
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