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Diffstat (limited to 'agg/inc/agg_image_filters.h')
-rwxr-xr-x | agg/inc/agg_image_filters.h | 449 |
1 files changed, 0 insertions, 449 deletions
diff --git a/agg/inc/agg_image_filters.h b/agg/inc/agg_image_filters.h deleted file mode 100755 index a2037fe0eff1..000000000000 --- a/agg/inc/agg_image_filters.h +++ /dev/null @@ -1,449 +0,0 @@ -//---------------------------------------------------------------------------- -// Anti-Grain Geometry - Version 2.3 -// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com) -// -// Permission to copy, use, modify, sell and distribute this software -// is granted provided this copyright notice appears in all copies. -// This software is provided "as is" without express or implied -// warranty, and with no claim as to its suitability for any purpose. -// -//---------------------------------------------------------------------------- -// Contact: mcseem@antigrain.com -// mcseemagg@yahoo.com -// http://www.antigrain.com -//---------------------------------------------------------------------------- -// -// Image transformation filters, -// Filtering classes (image_filter_lut, image_filter), -// Basic filter shape classes -//---------------------------------------------------------------------------- -#ifndef AGG_IMAGE_FILTERS_INCLUDED -#define AGG_IMAGE_FILTERS_INCLUDED - -#include <math.h> -#include "agg_basics.h" - -namespace agg -{ - - // See Implementation agg_image_filters.cpp - - enum - { - image_filter_shift = 14, //----image_filter_shift - image_filter_size = 1 << image_filter_shift, //----image_filter_size - image_filter_mask = image_filter_size - 1, //----image_filter_mask - - image_subpixel_shift = 8, //----image_subpixel_shift - image_subpixel_size = 1 << image_subpixel_shift, //----image_subpixel_size - image_subpixel_mask = image_subpixel_size - 1 //----image_subpixel_mask - }; - - - //-----------------------------------------------------image_filter_lut - class image_filter_lut - { - public: - ~image_filter_lut(); - image_filter_lut(); - - template<class FilterF> void calculate(const FilterF& filter, - bool normalization=true) - { - double r = filter.radius(); - realloc(r); - unsigned i; - unsigned pivot = diameter() << (image_subpixel_shift - 1); - for(i = 0; i < pivot; i++) - { - double x = double(i) / double(image_subpixel_size); - double y = filter.calc_weight(x); - m_weight_array[pivot + i] = - m_weight_array[pivot - i] = int16(y * image_filter_size + 0.5); - } - unsigned end = (diameter() << image_subpixel_shift) - 1; - m_weight_array[0] = m_weight_array[end]; - if(normalization) - { - normalize(); - } - } - - template<class FilterF> image_filter_lut(const FilterF& filter, - bool normalization=true) : - m_weight_array(0), - m_max_size(0) - { - calculate(filter, normalization); - } - - double radius() const { return m_radius; } - unsigned diameter() const { return m_diameter; } - int start() const { return m_start; } - const int16* weight_array() const { return m_weight_array; } - void normalize(); - - private: - void realloc(double radius); - image_filter_lut(const image_filter_lut&); - const image_filter_lut& operator = (const image_filter_lut&); - - double m_radius; - unsigned m_diameter; - int m_start; - int16* m_weight_array; - unsigned m_max_size; - }; - - - - //--------------------------------------------------------image_filter - template<class FilterF> class image_filter : public image_filter_lut - { - public: - image_filter() - { - calculate(m_filter_function); - } - private: - FilterF m_filter_function; - }; - - - //-----------------------------------------------image_filter_bilinear - struct image_filter_bilinear - { - static double radius() { return 1.0; } - static double calc_weight(double x) - { - return 1.0 - x; - } - }; - - - //-----------------------------------------------image_filter_hanning - struct image_filter_hanning - { - static double radius() { return 1.0; } - static double calc_weight(double x) - { - return 0.5 + 0.5 * cos(pi * x); - } - }; - - - //-----------------------------------------------image_filter_hamming - struct image_filter_hamming - { - static double radius() { return 1.0; } - static double calc_weight(double x) - { - return 0.54 + 0.46 * cos(pi * x); - } - }; - - //-----------------------------------------------image_filter_hermite - struct image_filter_hermite - { - static double radius() { return 1.0; } - static double calc_weight(double x) - { - return (2.0 * x - 3.0) * x * x + 1.0; - } - }; - - //------------------------------------------------image_filter_quadric - struct image_filter_quadric - { - static double radius() { return 1.5; } - static double calc_weight(double x) - { - double t; - if(x < 0.5) return 0.75 - x * x; - if(x < 1.5) {t = x - 1.5; return 0.5 * t * t;} - return 0.0; - } - }; - - //------------------------------------------------image_filter_bicubic - class image_filter_bicubic - { - static double pow3(double x) - { - return (x <= 0.0) ? 0.0 : x * x * x; - } - - public: - static double radius() { return 2.0; } - static double calc_weight(double x) - { - return - (1.0/6.0) * - (pow3(x + 2) - 4 * pow3(x + 1) + 6 * pow3(x) - 4 * pow3(x - 1)); - } - }; - - //-------------------------------------------------image_filter_kaiser - class image_filter_kaiser - { - double a; - double i0a; - double epsilon; - - public: - image_filter_kaiser(double b = 6.33) : - a(b), epsilon(1e-12) - { - i0a = 1.0 / bessel_i0(b); - } - - static double radius() { return 1.0; } - double calc_weight(double x) const - { - return bessel_i0(a * sqrt(1. - x * x)) * i0a; - } - - private: - double bessel_i0(double x) const - { - int i; - double sum, y, t; - - sum = 1.; - y = x * x / 4.; - t = y; - - for(i = 2; t > epsilon; i++) - { - sum += t; - t *= (double)y / (i * i); - } - return sum; - } - }; - - //----------------------------------------------image_filter_catrom - struct image_filter_catrom - { - static double radius() { return 2.0; } - static double calc_weight(double x) - { - if(x < 1.0) return 0.5 * (2.0 + x * x * (-5.0 + x * 3.0)); - if(x < 2.0) return 0.5 * (4.0 + x * (-8.0 + x * (5.0 - x))); - return 0.; - } - }; - - //---------------------------------------------image_filter_mitchell - class image_filter_mitchell - { - double p0, p2, p3; - double q0, q1, q2, q3; - - public: - image_filter_mitchell(double b = 1.0/3.0, double c = 1.0/3.0) : - p0((6.0 - 2.0 * b) / 6.0), - p2((-18.0 + 12.0 * b + 6.0 * c) / 6.0), - p3((12.0 - 9.0 * b - 6.0 * c) / 6.0), - q0((8.0 * b + 24.0 * c) / 6.0), - q1((-12.0 * b - 48.0 * c) / 6.0), - q2((6.0 * b + 30.0 * c) / 6.0), - q3((-b - 6.0 * c) / 6.0) - {} - - static double radius() { return 2.0; } - double calc_weight(double x) const - { - if(x < 1.0) return p0 + x * x * (p2 + x * p3); - if(x < 2.0) return q0 + x * (q1 + x * (q2 + x * q3)); - return 0.0; - } - }; - - - //----------------------------------------------image_filter_spline16 - struct image_filter_spline16 - { - static double radius() { return 2.0; } - static double calc_weight(double x) - { - if(x < 1.0) - { - return ((x - 9.0/5.0 ) * x - 1.0/5.0 ) * x + 1.0; - } - return ((-1.0/3.0 * (x-1) + 4.0/5.0) * (x-1) - 7.0/15.0 ) * (x-1); - } - }; - - - //---------------------------------------------image_filter_spline36 - struct image_filter_spline36 - { - static double radius() { return 3.0; } - static double calc_weight(double x) - { - if(x < 1.0) - { - return ((13.0/11.0 * x - 453.0/209.0) * x - 3.0/209.0) * x + 1.0; - } - if(x < 2.0) - { - return ((-6.0/11.0 * (x-1) + 270.0/209.0) * (x-1) - 156.0/ 209.0) * (x-1); - } - return ((1.0/11.0 * (x-2) - 45.0/209.0) * (x-2) + 26.0/209.0) * (x-2); - } - }; - - - //----------------------------------------------image_filter_gaussian - struct image_filter_gaussian - { - static double radius() { return 2.0; } - static double calc_weight(double x) - { - return exp(-2.0 * x * x) * sqrt(2.0 / pi); - } - }; - - - //------------------------------------------------image_filter_bessel - struct image_filter_bessel - { - static double radius() { return 3.2383; } - static double calc_weight(double x) - { - return (x == 0.0) ? pi / 4.0 : j1(pi * x) / (2.0 * x); - } - }; - - - //-------------------------------------------------image_filter_sinc - class image_filter_sinc - { - public: - image_filter_sinc(double r) : m_radius(r < 2.0 ? 2.0 : r) {} - double radius() const { return m_radius; } - double calc_weight(double x) const - { - if(x == 0.0) return 1.0; - x *= pi; - return sin(x) / x; - } - private: - double m_radius; - }; - - - //-----------------------------------------------image_filter_lanczos - class image_filter_lanczos - { - public: - image_filter_lanczos(double r) : m_radius(r < 2.0 ? 2.0 : r) {} - double radius() const { return m_radius; } - double calc_weight(double x) const - { - if(x == 0.0) return 1.0; - if(x > m_radius) return 0.0; - x *= pi; - double xr = x / m_radius; - return (sin(x) / x) * (sin(xr) / xr); - } - private: - double m_radius; - }; - - - //----------------------------------------------image_filter_blackman - class image_filter_blackman - { - public: - image_filter_blackman(double r) : m_radius(r < 2.0 ? 2.0 : r) {} - double radius() const { return m_radius; } - double calc_weight(double x) const - { - if(x == 0.0) return 1.0; - if(x > m_radius) return 0.0; - x *= pi; - double xr = x / m_radius; - return (sin(x) / x) * (0.42 + 0.5*cos(xr) + 0.08*cos(2*xr)); - } - private: - double m_radius; - }; - - //------------------------------------------------image_filter_sinc36 - class image_filter_sinc36 : public image_filter_sinc - { public: image_filter_sinc36() : image_filter_sinc(3.0){} }; - - //------------------------------------------------image_filter_sinc64 - class image_filter_sinc64 : public image_filter_sinc - { public: image_filter_sinc64() : image_filter_sinc(4.0){} }; - - //-----------------------------------------------image_filter_sinc100 - class image_filter_sinc100 : public image_filter_sinc - { public: image_filter_sinc100() : image_filter_sinc(5.0){} }; - - //-----------------------------------------------image_filter_sinc144 - class image_filter_sinc144 : public image_filter_sinc - { public: image_filter_sinc144() : image_filter_sinc(6.0){} }; - - //-----------------------------------------------image_filter_sinc196 - class image_filter_sinc196 : public image_filter_sinc - { public: image_filter_sinc196() : image_filter_sinc(7.0){} }; - - //-----------------------------------------------image_filter_sinc256 - class image_filter_sinc256 : public image_filter_sinc - { public: image_filter_sinc256() : image_filter_sinc(8.0){} }; - - //---------------------------------------------image_filter_lanczos36 - class image_filter_lanczos36 : public image_filter_lanczos - { public: image_filter_lanczos36() : image_filter_lanczos(3.0){} }; - - //---------------------------------------------image_filter_lanczos64 - class image_filter_lanczos64 : public image_filter_lanczos - { public: image_filter_lanczos64() : image_filter_lanczos(4.0){} }; - - //--------------------------------------------image_filter_lanczos100 - class image_filter_lanczos100 : public image_filter_lanczos - { public: image_filter_lanczos100() : image_filter_lanczos(5.0){} }; - - //--------------------------------------------image_filter_lanczos144 - class image_filter_lanczos144 : public image_filter_lanczos - { public: image_filter_lanczos144() : image_filter_lanczos(6.0){} }; - - //--------------------------------------------image_filter_lanczos196 - class image_filter_lanczos196 : public image_filter_lanczos - { public: image_filter_lanczos196() : image_filter_lanczos(7.0){} }; - - //--------------------------------------------image_filter_lanczos256 - class image_filter_lanczos256 : public image_filter_lanczos - { public: image_filter_lanczos256() : image_filter_lanczos(8.0){} }; - - //--------------------------------------------image_filter_blackman36 - class image_filter_blackman36 : public image_filter_blackman - { public: image_filter_blackman36() : image_filter_blackman(3.0){} }; - - //--------------------------------------------image_filter_blackman64 - class image_filter_blackman64 : public image_filter_blackman - { public: image_filter_blackman64() : image_filter_blackman(4.0){} }; - - //-------------------------------------------image_filter_blackman100 - class image_filter_blackman100 : public image_filter_blackman - { public: image_filter_blackman100() : image_filter_blackman(5.0){} }; - - //-------------------------------------------image_filter_blackman144 - class image_filter_blackman144 : public image_filter_blackman - { public: image_filter_blackman144() : image_filter_blackman(6.0){} }; - - //-------------------------------------------image_filter_blackman196 - class image_filter_blackman196 : public image_filter_blackman - { public: image_filter_blackman196() : image_filter_blackman(7.0){} }; - - //-------------------------------------------image_filter_blackman256 - class image_filter_blackman256 : public image_filter_blackman - { public: image_filter_blackman256() : image_filter_blackman(8.0){} }; - - -} - -#endif |