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Diffstat (limited to 'agg/inc/agg_span_pattern_filter_gray.h')
-rwxr-xr-x | agg/inc/agg_span_pattern_filter_gray.h | 472 |
1 files changed, 472 insertions, 0 deletions
diff --git a/agg/inc/agg_span_pattern_filter_gray.h b/agg/inc/agg_span_pattern_filter_gray.h new file mode 100755 index 000000000000..17a7984be7fe --- /dev/null +++ b/agg/inc/agg_span_pattern_filter_gray.h @@ -0,0 +1,472 @@ +//---------------------------------------------------------------------------- +// 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 +//---------------------------------------------------------------------------- +// +// classes span_pattern_filter_gray* +// +//---------------------------------------------------------------------------- +#ifndef AGG_SPAN_PATTERN_FILTER_GRAY_INCLUDED +#define AGG_SPAN_PATTERN_FILTER_GRAY_INCLUDED + +#include "agg_basics.h" +#include "agg_color_gray.h" +#include "agg_span_pattern.h" +#include "agg_span_image_filter.h" + + +namespace agg +{ + + //===========================================span_pattern_filter_gray + template<class ColorT, + class Interpolator, + class WrapModeX, + class WrapModeY, + class Allocator = span_allocator<ColorT> > + class span_pattern_filter_gray_nn : + public span_image_filter<ColorT, Interpolator, Allocator> + { + public: + typedef ColorT color_type; + typedef Interpolator interpolator_type; + typedef Allocator alloc_type; + typedef span_image_filter<color_type, interpolator_type, alloc_type> base_type; + typedef typename color_type::value_type value_type; + typedef typename color_type::calc_type calc_type; + enum + { + base_shift = color_type::base_shift, + base_mask = color_type::base_mask + }; + + //-------------------------------------------------------------------- + span_pattern_filter_gray_nn(alloc_type& alloc) : + base_type(alloc), + m_wrap_mode_x(1), + m_wrap_mode_y(1) + {} + + //-------------------------------------------------------------------- + span_pattern_filter_gray_nn(alloc_type& alloc, + const rendering_buffer& src, + interpolator_type& inter) : + base_type(alloc, src, color_type(0,0), inter, 0), + m_wrap_mode_x(src.width()), + m_wrap_mode_y(src.height()) + {} + + //-------------------------------------------------------------------- + void source_image(const rendering_buffer& src) + { + base_type::source_image(src); + m_wrap_mode_x = WrapModeX(src.width()); + m_wrap_mode_y = WrapModeX(src.height()); + } + + //-------------------------------------------------------------------- + color_type* generate(int x, int y, unsigned len) + { + base_type::interpolator().begin(x + base_type::filter_dx_dbl(), + y + base_type::filter_dy_dbl(), len); + color_type* span = base_type::allocator().span(); + do + { + base_type::interpolator().coordinates(&x, &y); + + x = m_wrap_mode_x(x >> image_subpixel_shift); + y = m_wrap_mode_y(y >> image_subpixel_shift); + + span->v = *((value_type*)base_type::source_image().row(y) + x); + span->a = base_mask; + ++span; + ++base_type::interpolator(); + + } while(--len); + + return base_type::allocator().span(); + } + + private: + WrapModeX m_wrap_mode_x; + WrapModeY m_wrap_mode_y; + }; + + + + + + + //====================================span_pattern_filter_gray_bilinear + template<class ColorT, + class Interpolator, + class WrapModeX, + class WrapModeY, + class Allocator = span_allocator<ColorT> > + class span_pattern_filter_gray_bilinear : + public span_image_filter<ColorT, Interpolator, Allocator> + { + public: + typedef ColorT color_type; + typedef Interpolator interpolator_type; + typedef Allocator alloc_type; + typedef span_image_filter<color_type, interpolator_type, alloc_type> base_type; + typedef typename color_type::value_type value_type; + typedef typename color_type::calc_type calc_type; + enum + { + base_shift = color_type::base_shift, + base_mask = color_type::base_mask + }; + + //-------------------------------------------------------------------- + span_pattern_filter_gray_bilinear(alloc_type& alloc) : + base_type(alloc), + m_wrap_mode_x(1), + m_wrap_mode_y(1) + {} + + //-------------------------------------------------------------------- + span_pattern_filter_gray_bilinear(alloc_type& alloc, + const rendering_buffer& src, + interpolator_type& inter) : + base_type(alloc, src, color_type(0,0), inter, 0), + m_wrap_mode_x(src.width()), + m_wrap_mode_y(src.height()) + {} + + //------------------------------------------------------------------- + void source_image(const rendering_buffer& src) + { + base_type::source_image(src); + m_wrap_mode_x = WrapModeX(src.width()); + m_wrap_mode_y = WrapModeX(src.height()); + } + + //-------------------------------------------------------------------- + color_type* generate(int x, int y, unsigned len) + { + base_type::interpolator().begin(x + base_type::filter_dx_dbl(), + y + base_type::filter_dy_dbl(), len); + calc_type fg; + color_type* span = base_type::allocator().span(); + do + { + int x_hr; + int y_hr; + + base_type::interpolator().coordinates(&x_hr, &y_hr); + + x_hr -= base_type::filter_dx_int(); + y_hr -= base_type::filter_dy_int(); + + int x_lr = x_hr >> image_subpixel_shift; + int y_lr = y_hr >> image_subpixel_shift; + + unsigned x1 = m_wrap_mode_x(x_lr); + unsigned x2 = ++m_wrap_mode_x; + + unsigned y1 = m_wrap_mode_y(y_lr); + unsigned y2 = ++m_wrap_mode_y; + const value_type* ptr1 = (value_type*)base_type::source_image().row(y1); + const value_type* ptr2 = (value_type*)base_type::source_image().row(y2); + + fg = image_subpixel_size * image_subpixel_size / 2; + + x_hr &= image_subpixel_mask; + y_hr &= image_subpixel_mask; + + fg += ptr1[x1] * (image_subpixel_size - x_hr) * (image_subpixel_size - y_hr); + fg += ptr1[x2] * x_hr * (image_subpixel_size - y_hr); + fg += ptr2[x1] * (image_subpixel_size - x_hr) * y_hr; + fg += ptr2[x2] * x_hr * y_hr; + + span->v = (value_type)(fg >> image_subpixel_shift * 2); + span->a = base_mask; + ++span; + ++base_type::interpolator(); + + } while(--len); + + return base_type::allocator().span(); + } + private: + WrapModeX m_wrap_mode_x; + WrapModeY m_wrap_mode_y; + }; + + + + + + + + + + //====================================span_pattern_filter_gray_2x2 + template<class ColorT, + class Interpolator, + class WrapModeX, + class WrapModeY, + class Allocator = span_allocator<ColorT> > + class span_pattern_filter_gray_2x2 : + public span_image_filter<ColorT, Interpolator, Allocator> + { + public: + typedef ColorT color_type; + typedef Interpolator interpolator_type; + typedef Allocator alloc_type; + typedef span_image_filter<color_type, interpolator_type, alloc_type> base_type; + typedef typename color_type::value_type value_type; + typedef typename color_type::calc_type calc_type; + enum + { + base_shift = color_type::base_shift, + base_mask = color_type::base_mask + }; + + //-------------------------------------------------------------------- + span_pattern_filter_gray_2x2(alloc_type& alloc) : + base_type(alloc), + m_wrap_mode_x(1), + m_wrap_mode_y(1) + {} + + //-------------------------------------------------------------------- + span_pattern_filter_gray_2x2(alloc_type& alloc, + const rendering_buffer& src, + interpolator_type& inter, + const image_filter_lut& filter) : + base_type(alloc, src, color_type(0,0), inter, &filter), + m_wrap_mode_x(src.width()), + m_wrap_mode_y(src.height()) + {} + + //------------------------------------------------------------------- + void source_image(const rendering_buffer& src) + { + base_type::source_image(src); + m_wrap_mode_x = WrapModeX(src.width()); + m_wrap_mode_y = WrapModeX(src.height()); + } + + //-------------------------------------------------------------------- + color_type* generate(int x, int y, unsigned len) + { + base_type::interpolator().begin(x + base_type::filter_dx_dbl(), + y + base_type::filter_dy_dbl(), len); + calc_type fg; + color_type* span = base_type::allocator().span(); + const int16* weight_array = base_type::filter().weight_array() + + ((base_type::filter().diameter()/2 - 1) << + image_subpixel_shift); + do + { + int x_hr; + int y_hr; + + base_type::interpolator().coordinates(&x_hr, &y_hr); + + x_hr -= base_type::filter_dx_int(); + y_hr -= base_type::filter_dy_int(); + + int x_lr = x_hr >> image_subpixel_shift; + int y_lr = y_hr >> image_subpixel_shift; + + unsigned x1 = m_wrap_mode_x(x_lr); + unsigned x2 = ++m_wrap_mode_x; + + unsigned y1 = m_wrap_mode_y(y_lr); + unsigned y2 = ++m_wrap_mode_y; + const value_type* ptr1 = (value_type*)base_type::source_image().row(y1); + const value_type* ptr2 = (value_type*)base_type::source_image().row(y2); + + fg = image_filter_size / 2; + + x_hr &= image_subpixel_mask; + y_hr &= image_subpixel_mask; + + fg += ptr1[x1] * ((weight_array[x_hr + image_subpixel_size] * + weight_array[y_hr + image_subpixel_size] + + image_filter_size / 2) >> + image_filter_shift); + fg += ptr1[x2] * ((weight_array[x_hr] * + weight_array[y_hr + image_subpixel_size] + + image_filter_size / 2) >> + image_filter_shift); + fg += ptr2[x1] * ((weight_array[x_hr + image_subpixel_size] * + weight_array[y_hr] + + image_filter_size / 2) >> + image_filter_shift); + fg += ptr2[x2] * ((weight_array[x_hr] * + weight_array[y_hr] + + image_filter_size / 2) >> + image_filter_shift); + + fg >>= image_filter_shift; + if(fg > base_mask) fg = base_mask; + + span->v = (value_type)fg; + span->a = base_mask; + ++span; + ++base_type::interpolator(); + + } while(--len); + + return base_type::allocator().span(); + } + private: + WrapModeX m_wrap_mode_x; + WrapModeY m_wrap_mode_y; + }; + + + + + + + + + + + + + //==============================================span_pattern_filter_gray + template<class ColorT, + class Interpolator, + class WrapModeX, + class WrapModeY, + class Allocator = span_allocator<ColorT> > + class span_pattern_filter_gray : + public span_image_filter<ColorT, Interpolator, Allocator> + { + public: + typedef ColorT color_type; + typedef Interpolator interpolator_type; + typedef Allocator alloc_type; + typedef span_image_filter<color_type, interpolator_type, alloc_type> base_type; + typedef typename color_type::value_type value_type; + typedef typename color_type::calc_type calc_type; + enum + { + base_shift = color_type::base_shift, + base_mask = color_type::base_mask + }; + + //-------------------------------------------------------------------- + span_pattern_filter_gray(alloc_type& alloc) : + base_type(alloc) + {} + + //-------------------------------------------------------------------- + span_pattern_filter_gray(alloc_type& alloc, + const rendering_buffer& src, + interpolator_type& inter, + const image_filter_lut& filter) : + base_type(alloc, src, color_type(0,0), inter, &filter), + m_wrap_mode_x(src.width()), + m_wrap_mode_y(src.height()) + {} + + //-------------------------------------------------------------------- + void source_image(const rendering_buffer& src) + { + base_type::source_image(src); + m_wrap_mode_x = WrapModeX(src.width()); + m_wrap_mode_y = WrapModeX(src.height()); + } + + //-------------------------------------------------------------------- + color_type* generate(int x, int y, unsigned len) + { + base_type::interpolator().begin(x + base_type::filter_dx_dbl(), + y + base_type::filter_dy_dbl(), len); + int fg; + + unsigned diameter = base_type::filter().diameter(); + int start = base_type::filter().start(); + const int16* weight_array = base_type::filter().weight_array(); + + color_type* span = base_type::allocator().span(); + + int x_count; + int weight_y; + + do + { + base_type::interpolator().coordinates(&x, &y); + + x -= base_type::filter_dx_int(); + y -= base_type::filter_dy_int(); + + int x_hr = x; + int y_hr = y; + + int x_fract = x_hr & image_subpixel_mask; + unsigned y_count = diameter; + + int y_lr = m_wrap_mode_y((y >> image_subpixel_shift) + start); + int x_int = (x >> image_subpixel_shift) + start; + int x_lr; + + y_hr = image_subpixel_mask - (y_hr & image_subpixel_mask); + fg = image_filter_size / 2; + + do + { + x_count = diameter; + weight_y = weight_array[y_hr]; + x_hr = image_subpixel_mask - x_fract; + x_lr = m_wrap_mode_x(x_int); + const value_type* row_ptr = (value_type*)base_type::source_image().row(y_lr); + do + { + fg += row_ptr[x_lr] * ((weight_y * weight_array[x_hr] + + image_filter_size / 2) >> + image_filter_shift); + x_hr += image_subpixel_size; + x_lr = ++m_wrap_mode_x; + } while(--x_count); + + y_hr += image_subpixel_size; + y_lr = ++m_wrap_mode_y; + } while(--y_count); + + fg >>= image_filter_shift; + + if(fg < 0) fg = 0; + if(fg > base_mask) fg = base_mask; + + span->v = fg; + span->a = base_mask; + ++span; + ++base_type::interpolator(); + + } while(--len); + + return base_type::allocator().span(); + } + + private: + WrapModeX m_wrap_mode_x; + WrapModeY m_wrap_mode_y; + }; + + +} + + +#endif + + + |