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| 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 // Bessel function (besj) was adapted for use in AGG library by Andy Wilk | |
| 17 // Contact: castor.vulgaris@gmail.com | |
| 18 //---------------------------------------------------------------------------- | |
| 19 #ifndef AGG_MATH_INCLUDED | |
| 20 #define AGG_MATH_INCLUDED | |
| 21 #include "agg_basics.h" | |
| 22 namespace agg | |
| 23 { | |
| 24 const FX_FLOAT intersection_epsilon = 1.0e-30f; | |
| 25 AGG_INLINE FX_FLOAT calc_point_location(FX_FLOAT x1, FX_FLOAT y1, | |
| 26 FX_FLOAT x2, FX_FLOAT y2, | |
| 27 FX_FLOAT x, FX_FLOAT y) | |
| 28 { | |
| 29 return FXSYS_Mul(x - x2, y2 - y1) - FXSYS_Mul(y - y2, x2 - x1); | |
| 30 } | |
| 31 AGG_INLINE FX_FLOAT calc_distance(FX_FLOAT x1, FX_FLOAT y1, FX_FLOAT x2, FX_FLOA
T y2) | |
| 32 { | |
| 33 FX_FLOAT dx = x2 - x1; | |
| 34 FX_FLOAT dy = y2 - y1; | |
| 35 return FXSYS_sqrt2(dx, dy); | |
| 36 } | |
| 37 AGG_INLINE FX_FLOAT calc_line_point_distance(FX_FLOAT x1, FX_FLOAT y1, | |
| 38 FX_FLOAT x2, FX_FLOAT y2, | |
| 39 FX_FLOAT x, FX_FLOAT y) | |
| 40 { | |
| 41 FX_FLOAT dx = x2 - x1; | |
| 42 FX_FLOAT dy = y2 - y1; | |
| 43 FX_FLOAT d = FXSYS_sqrt2(dx, dy); | |
| 44 if(d < intersection_epsilon) { | |
| 45 return calc_distance(x1, y1, x, y); | |
| 46 } | |
| 47 return FXSYS_MulDiv(x - x2, dy, d) - FXSYS_MulDiv(y - y2, dx, d); | |
| 48 } | |
| 49 AGG_INLINE bool calc_intersection(FX_FLOAT ax, FX_FLOAT ay, FX_FLOAT bx, FX_FLOA
T by, | |
| 50 FX_FLOAT cx, FX_FLOAT cy, FX_FLOAT dx, FX_FLOA
T dy, | |
| 51 FX_FLOAT* x, FX_FLOAT* y) | |
| 52 { | |
| 53 FX_FLOAT num = FXSYS_Mul(ay - cy, dx - cx) - FXSYS_Mul(ax - cx, dy - cy); | |
| 54 FX_FLOAT den = FXSYS_Mul(bx - ax, dy - cy) - FXSYS_Mul(by - ay, dx - cx); | |
| 55 if (FXSYS_fabs(den) < intersection_epsilon) { | |
| 56 return false; | |
| 57 } | |
| 58 *x = ax + FXSYS_MulDiv(bx - ax, num, den); | |
| 59 *y = ay + FXSYS_MulDiv(by - ay, num, den); | |
| 60 return true; | |
| 61 } | |
| 62 } | |
| 63 #endif | |
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Chromium Code Reviews
Issue 402463002:
Replace agg with skia (Closed)
Base URL: https://pdfium.googlesource.com/pdfium.git@master