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Diffstat (limited to 'xs/src/agg/agg_span_gradient_alpha.h')
-rw-r--r-- | xs/src/agg/agg_span_gradient_alpha.h | 126 |
1 files changed, 0 insertions, 126 deletions
diff --git a/xs/src/agg/agg_span_gradient_alpha.h b/xs/src/agg/agg_span_gradient_alpha.h deleted file mode 100644 index 2ec040e3b..000000000 --- a/xs/src/agg/agg_span_gradient_alpha.h +++ /dev/null @@ -1,126 +0,0 @@ -//---------------------------------------------------------------------------- -// Anti-Grain Geometry - Version 2.4 -// 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 -//---------------------------------------------------------------------------- - -#ifndef AGG_SPAN_GRADIENT_ALPHA_INCLUDED -#define AGG_SPAN_GRADIENT_ALPHA_INCLUDED - -#include "agg_span_gradient.h" - -namespace agg -{ - //======================================================span_gradient_alpha - template<class ColorT, - class Interpolator, - class GradientF, - class AlphaF> - class span_gradient_alpha - { - public: - typedef Interpolator interpolator_type; - typedef ColorT color_type; - typedef typename color_type::value_type alpha_type; - - enum downscale_shift_e - { - downscale_shift = interpolator_type::subpixel_shift - gradient_subpixel_shift - }; - - - //-------------------------------------------------------------------- - span_gradient_alpha() {} - - //-------------------------------------------------------------------- - span_gradient_alpha(interpolator_type& inter, - GradientF& gradient_function, - AlphaF& alpha_function, - double d1, double d2) : - m_interpolator(&inter), - m_gradient_function(&gradient_function), - m_alpha_function(&alpha_function), - m_d1(iround(d1 * gradient_subpixel_scale)), - m_d2(iround(d2 * gradient_subpixel_scale)) - {} - - //-------------------------------------------------------------------- - interpolator_type& interpolator() { return *m_interpolator; } - const GradientF& gradient_function() const { return *m_gradient_function; } - const AlphaF& alpha_function() const { return *m_alpha_function; } - double d1() const { return double(m_d1) / gradient_subpixel_scale; } - double d2() const { return double(m_d2) / gradient_subpixel_scale; } - - //-------------------------------------------------------------------- - void interpolator(interpolator_type& i) { m_interpolator = &i; } - void gradient_function(const GradientF& gf) { m_gradient_function = &gf; } - void alpha_function(const AlphaF& af) { m_alpha_function = ⁡ } - void d1(double v) { m_d1 = iround(v * gradient_subpixel_scale); } - void d2(double v) { m_d2 = iround(v * gradient_subpixel_scale); } - - //-------------------------------------------------------------------- - void prepare() {} - - //-------------------------------------------------------------------- - void generate(color_type* span, int x, int y, unsigned len) - { - int dd = m_d2 - m_d1; - if(dd < 1) dd = 1; - m_interpolator->begin(x+0.5, y+0.5, len); - do - { - m_interpolator->coordinates(&x, &y); - int d = m_gradient_function->calculate(x >> downscale_shift, - y >> downscale_shift, m_d2); - d = ((d - m_d1) * (int)m_alpha_function->size()) / dd; - if(d < 0) d = 0; - if(d >= (int)m_alpha_function->size()) d = m_alpha_function->size() - 1; - span->a = (*m_alpha_function)[d]; - ++span; - ++(*m_interpolator); - } - while(--len); - } - - private: - interpolator_type* m_interpolator; - GradientF* m_gradient_function; - AlphaF* m_alpha_function; - int m_d1; - int m_d2; - }; - - - //=======================================================gradient_alpha_x - template<class ColorT> struct gradient_alpha_x - { - typedef typename ColorT::value_type alpha_type; - alpha_type operator [] (alpha_type x) const { return x; } - }; - - //====================================================gradient_alpha_x_u8 - struct gradient_alpha_x_u8 - { - typedef int8u alpha_type; - alpha_type operator [] (alpha_type x) const { return x; } - }; - - //==========================================gradient_alpha_one_munus_x_u8 - struct gradient_alpha_one_munus_x_u8 - { - typedef int8u alpha_type; - alpha_type operator [] (alpha_type x) const { return 255-x; } - }; - -} - -#endif |