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285 lines
6.4 KiB
285 lines
6.4 KiB
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//---------------------------------------------------------------------------- |
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// Anti-Grain Geometry - Version 2.3 |
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// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com) |
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// |
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// Permission to copy, use, modify, sell and distribute this software |
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// is granted provided this copyright notice appears in all copies. |
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// This software is provided "as is" without express or implied |
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// warranty, and with no claim as to its suitability for any purpose. |
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// |
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//---------------------------------------------------------------------------- |
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// Contact: mcseem@antigrain.com |
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// mcseemagg@yahoo.com |
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// http://www.antigrain.com |
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//---------------------------------------------------------------------------- |
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#ifndef AGG_BASICS_INCLUDED |
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#define AGG_BASICS_INCLUDED |
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#ifndef AGG_INT8 |
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#define AGG_INT8 signed char |
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#endif |
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#ifndef AGG_INT8U |
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#define AGG_INT8U unsigned char |
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#endif |
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#ifndef AGG_INT16 |
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#define AGG_INT16 short |
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#endif |
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#ifndef AGG_INT16U |
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#define AGG_INT16U unsigned short |
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#endif |
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#ifndef AGG_INT32 |
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#define AGG_INT32 int |
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#endif |
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#ifndef AGG_INT32U |
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#define AGG_INT32U unsigned |
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#endif |
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#ifndef AGG_INT64 |
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#define AGG_INT64 signed long long |
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#endif |
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#ifndef AGG_INT64U |
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#define AGG_INT64U unsigned long long |
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#endif |
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#define AGG_INLINE inline |
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#include "core/fxcrt/fx_system.h" // For FX_FLOAT |
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namespace agg |
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{ |
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typedef AGG_INT8 int8; |
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typedef AGG_INT8U int8u; |
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typedef AGG_INT16 int16; |
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typedef AGG_INT16U int16u; |
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typedef AGG_INT32 int32; |
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typedef AGG_INT32U int32u; |
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typedef AGG_INT64 int64; |
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typedef AGG_INT64U int64u; |
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typedef unsigned char cover_type; |
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enum cover_scale_e { |
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cover_shift = 8, |
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cover_size = 1 << cover_shift, |
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cover_mask = cover_size - 1, |
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cover_none = 0, |
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cover_full = cover_mask |
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}; |
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template<class T> struct rect_base { |
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typedef rect_base<T> self_type; |
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T x1; |
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T y1; |
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T x2; |
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T y2; |
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rect_base() {} |
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rect_base(T x1_, T y1_, T x2_, T y2_) : |
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x1(x1_), y1(y1_), x2(x2_), y2(y2_) {} |
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const self_type& normalize() |
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{ |
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T t; |
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if(x1 > x2) { |
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t = x1; |
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x1 = x2; |
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x2 = t; |
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} |
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if(y1 > y2) { |
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t = y1; |
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y1 = y2; |
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y2 = t; |
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} |
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return *this; |
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} |
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bool clip(const self_type& r) |
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{ |
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if(x2 > r.x2) { |
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x2 = r.x2; |
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} |
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if(y2 > r.y2) { |
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y2 = r.y2; |
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} |
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if(x1 < r.x1) { |
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x1 = r.x1; |
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} |
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if(y1 < r.y1) { |
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y1 = r.y1; |
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} |
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return x1 <= x2 && y1 <= y2; |
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} |
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bool is_valid() const |
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{ |
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return x1 <= x2 && y1 <= y2; |
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} |
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}; |
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template<class Rect> |
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inline Rect intersect_rectangles(const Rect& r1, const Rect& r2) |
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{ |
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Rect r = r1; |
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if(r.x2 > r2.x2) { |
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r.x2 = r2.x2; |
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} |
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if(r.y2 > r2.y2) { |
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r.y2 = r2.y2; |
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} |
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if(r.x1 < r2.x1) { |
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r.x1 = r2.x1; |
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} |
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if(r.y1 < r2.y1) { |
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r.y1 = r2.y1; |
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} |
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return r; |
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} |
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template<class Rect> |
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inline Rect unite_rectangles(const Rect& r1, const Rect& r2) |
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{ |
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Rect r = r1; |
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if(r.x2 < r2.x2) { |
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r.x2 = r2.x2; |
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} |
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if(r.y2 < r2.y2) { |
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r.y2 = r2.y2; |
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} |
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if(r.x1 > r2.x1) { |
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r.x1 = r2.x1; |
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} |
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if(r.y1 > r2.y1) { |
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r.y1 = r2.y1; |
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} |
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return r; |
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} |
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typedef rect_base<int> rect; |
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typedef rect_base<FX_FLOAT> rect_d; |
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enum path_commands_e { |
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path_cmd_stop = 0, |
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path_cmd_move_to = 1, |
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path_cmd_line_to = 2, |
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path_cmd_curve3 = 3, |
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path_cmd_curve4 = 4, |
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path_cmd_curveN = 5, |
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path_cmd_catrom = 6, |
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path_cmd_ubspline = 7, |
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path_cmd_end_poly = 0x0F, |
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path_cmd_mask = 0x0F |
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}; |
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enum path_flags_e { |
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path_flags_none = 0, |
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path_flags_ccw = 0x10, |
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path_flags_cw = 0x20, |
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path_flags_close = 0x40, |
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path_flags_jr = 0x80, |
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path_flags_mask = 0xF0 |
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}; |
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inline bool is_vertex(unsigned c) |
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{ |
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c &= ~path_flags_jr; |
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return c >= path_cmd_move_to && c < path_cmd_end_poly; |
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} |
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inline bool is_drawing(unsigned c) |
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{ |
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c &= ~path_flags_jr; |
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return c >= path_cmd_line_to && c < path_cmd_end_poly; |
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} |
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inline bool is_stop(unsigned c) |
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{ |
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c &= ~path_flags_jr; |
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return c == path_cmd_stop; |
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} |
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inline bool is_move_to(unsigned c) |
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{ |
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c &= ~path_flags_jr; |
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return c == path_cmd_move_to; |
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} |
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inline bool is_line_to(unsigned c) |
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{ |
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c &= ~path_flags_jr; |
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return c == path_cmd_line_to; |
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} |
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inline bool is_curve(unsigned c) |
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{ |
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c &= ~path_flags_jr; |
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return c == path_cmd_curve3 || c == path_cmd_curve4; |
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} |
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inline bool is_curve3(unsigned c) |
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{ |
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c &= ~path_flags_jr; |
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return c == path_cmd_curve3; |
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} |
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inline bool is_curve4(unsigned c) |
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{ |
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c &= ~path_flags_jr; |
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return c == path_cmd_curve4; |
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} |
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inline bool is_end_poly(unsigned c) |
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{ |
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c &= ~path_flags_jr; |
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return (c & path_cmd_mask) == path_cmd_end_poly; |
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} |
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inline bool is_close(unsigned c) |
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{ |
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c &= ~path_flags_jr; |
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return (c & ~(path_flags_cw | path_flags_ccw)) == |
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(path_cmd_end_poly | path_flags_close); |
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} |
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inline bool is_next_poly(unsigned c) |
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{ |
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c &= ~path_flags_jr; |
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return is_stop(c) || is_move_to(c) || is_end_poly(c); |
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} |
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inline bool is_cw(unsigned c) |
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{ |
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c &= ~path_flags_jr; |
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return (c & path_flags_cw) != 0; |
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} |
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inline bool is_ccw(unsigned c) |
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{ |
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c &= ~path_flags_jr; |
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return (c & path_flags_ccw) != 0; |
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} |
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inline bool is_oriented(unsigned c) |
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{ |
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c &= ~path_flags_jr; |
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return (c & (path_flags_cw | path_flags_ccw)) != 0; |
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} |
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inline bool is_closed(unsigned c) |
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{ |
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c &= ~path_flags_jr; |
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return (c & path_flags_close) != 0; |
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} |
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inline unsigned get_close_flag(unsigned c) |
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{ |
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c &= ~path_flags_jr; |
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return c & path_flags_close; |
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} |
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inline unsigned clear_orientation(unsigned c) |
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{ |
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c &= ~path_flags_jr; |
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return c & ~(path_flags_cw | path_flags_ccw); |
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} |
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inline unsigned get_orientation(unsigned c) |
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{ |
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c &= ~path_flags_jr; |
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return c & (path_flags_cw | path_flags_ccw); |
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} |
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inline unsigned set_orientation(unsigned c, unsigned o) |
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{ |
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c &= ~path_flags_jr; |
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return clear_orientation(c) | o; |
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} |
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struct point_type { |
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FX_FLOAT x, y; |
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unsigned flag; |
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point_type() {} |
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point_type(FX_FLOAT x_, FX_FLOAT y_, unsigned flag_ = 0) : x(x_), y(y_), flag(flag_) {} |
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}; |
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struct point_type_flag : public point_type { |
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unsigned flag; |
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point_type_flag() |
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{ |
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flag = 0; |
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} |
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point_type_flag(FX_FLOAT x_, FX_FLOAT y_, unsigned flag_ = 0) : point_type(x_, y_), flag(flag_) {} |
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}; |
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struct vertex_type { |
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FX_FLOAT x, y; |
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unsigned cmd; |
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vertex_type() {} |
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vertex_type(FX_FLOAT x_, FX_FLOAT y_, unsigned cmd_) : |
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x(x_), y(y_), cmd(cmd_) {} |
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}; |
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} |
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#endif
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