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Diffstat (limited to 'agg/inc/agg_span_image_filter_gray.h')
-rwxr-xr-x | agg/inc/agg_span_image_filter_gray.h | 701 |
1 files changed, 701 insertions, 0 deletions
diff --git a/agg/inc/agg_span_image_filter_gray.h b/agg/inc/agg_span_image_filter_gray.h new file mode 100755 index 000000000000..3f7ae6fcfa72 --- /dev/null +++ b/agg/inc/agg_span_image_filter_gray.h @@ -0,0 +1,701 @@ +//---------------------------------------------------------------------------- +// 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 +//---------------------------------------------------------------------------- +// +// Adaptation for high precision colors has been sponsored by +// Liberty Technology Systems, Inc., visit http://lib-sys.com +// +// Liberty Technology Systems, Inc. is the provider of +// PostScript and PDF technology for software developers. +// +//---------------------------------------------------------------------------- + +#ifndef AGG_SPAN_IMAGE_FILTER_GRAY_INCLUDED +#define AGG_SPAN_IMAGE_FILTER_GRAY_INCLUDED + +#include "agg_basics.h" +#include "agg_color_gray.h" +#include "agg_span_image_filter.h" + + +namespace agg +{ + + + //==============================================span_image_filter_gray_nn + template<class ColorT, + class Interpolator, + class Allocator = span_allocator<ColorT> > + class span_image_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_image_filter_gray_nn(alloc_type& alloc) : base_type(alloc) {} + + //-------------------------------------------------------------------- + span_image_filter_gray_nn(alloc_type& alloc, + const rendering_buffer& src, + const color_type& back_color, + interpolator_type& inter) : + base_type(alloc, src, back_color, inter, 0) + {} + + //-------------------------------------------------------------------- + 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; + calc_type src_alpha; + + color_type* span = base_type::allocator().span(); + + int maxx = base_type::source_image().width() - 1; + int maxy = base_type::source_image().height() - 1; + + do + { + base_type::interpolator().coordinates(&x, &y); + + x >>= image_subpixel_shift; + y >>= image_subpixel_shift; + + if(x >= 0 && y >= 0 && + x <= maxx && y <= maxy) + { + fg = *((const value_type*)base_type::source_image().row(y) + x); + src_alpha = base_mask; + } + else + { + fg = base_type::background_color().v; + src_alpha = base_type::background_color().a; + } + + span->v = (value_type)fg; + span->a = (value_type)src_alpha; + ++span; + ++base_type::interpolator(); + + } while(--len); + + return base_type::allocator().span(); + } + }; + + + + + //========================================span_image_filter_gray_bilinear + template<class ColorT, + class Interpolator, + class Allocator = span_allocator<ColorT> > + class span_image_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_image_filter_gray_bilinear(alloc_type& alloc) : base_type(alloc) {} + + //-------------------------------------------------------------------- + span_image_filter_gray_bilinear(alloc_type& alloc, + const rendering_buffer& src, + const color_type& back_color, + interpolator_type& inter) : + base_type(alloc, src, back_color, inter, 0) + {} + + //-------------------------------------------------------------------- + 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; + calc_type src_alpha; + value_type back_v = base_type::background_color().v; + value_type back_a = base_type::background_color().a; + + const value_type *fg_ptr; + + color_type* span = base_type::allocator().span(); + + int maxx = base_type::source_image().width() - 1; + int maxy = base_type::source_image().height() - 1; + + 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; + + if(x_lr >= 0 && y_lr >= 0 && + x_lr < maxx && y_lr < maxy) + { + fg = image_subpixel_size * image_subpixel_size / 2; + + x_hr &= image_subpixel_mask; + y_hr &= image_subpixel_mask; + fg_ptr = (const value_type*)base_type::source_image().row(y_lr) + x_lr; + + fg += *fg_ptr++ * (image_subpixel_size - x_hr) * (image_subpixel_size - y_hr); + fg += *fg_ptr++ * (image_subpixel_size - y_hr) * x_hr; + + fg_ptr = (const value_type*)base_type::source_image().next_row(fg_ptr - 2); + + fg += *fg_ptr++ * (image_subpixel_size - x_hr) * y_hr; + fg += *fg_ptr++ * x_hr * y_hr; + + fg >>= image_subpixel_shift * 2; + src_alpha = base_mask; + } + else + { + unsigned weight; + if(x_lr < -1 || y_lr < -1 || + x_lr > maxx || y_lr > maxy) + { + fg = back_v; + src_alpha = back_a; + } + else + { + fg = + src_alpha = image_subpixel_size * image_subpixel_size / 2; + + x_hr &= image_subpixel_mask; + y_hr &= image_subpixel_mask; + + weight = (image_subpixel_size - x_hr) * + (image_subpixel_size - y_hr); + if(x_lr >= 0 && y_lr >= 0 && + x_lr <= maxx && y_lr <= maxy) + { + fg += weight * *((const value_type*)base_type::source_image().row(y_lr) + x_lr); + src_alpha += weight * base_mask; + } + else + { + fg += back_v * weight; + src_alpha += back_a * weight; + } + + x_lr++; + + weight = x_hr * (image_subpixel_size - y_hr); + if(x_lr >= 0 && y_lr >= 0 && + x_lr <= maxx && y_lr <= maxy) + { + fg += weight * *((const value_type*)base_type::source_image().row(y_lr) + x_lr); + src_alpha += weight * base_mask; + } + else + { + fg += back_v * weight; + src_alpha += back_a * weight; + } + + x_lr--; + y_lr++; + + weight = (image_subpixel_size - x_hr) * y_hr; + if(x_lr >= 0 && y_lr >= 0 && + x_lr <= maxx && y_lr <= maxy) + { + fg += weight * *((const value_type*)base_type::source_image().row(y_lr) + x_lr); + src_alpha += weight * base_mask; + } + else + { + fg += back_v * weight; + src_alpha += back_a * weight; + } + + x_lr++; + + weight = x_hr * y_hr; + if(x_lr >= 0 && y_lr >= 0 && + x_lr <= maxx && y_lr <= maxy) + { + fg += weight * *((const value_type*)base_type::source_image().row(y_lr) + x_lr); + src_alpha += weight * base_mask; + } + else + { + fg += back_v * weight; + src_alpha += back_a * weight; + } + + fg >>= image_subpixel_shift * 2; + src_alpha >>= image_subpixel_shift * 2; + } + } + + span->v = (value_type)fg; + span->a = (value_type)src_alpha; + ++span; + ++base_type::interpolator(); + + } while(--len); + + return base_type::allocator().span(); + } + }; + + + + + + + + //========================================span_image_filter_gray_2x2 + template<class ColorT, + class Interpolator, + class Allocator = span_allocator<ColorT> > + class span_image_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_image_filter_gray_2x2(alloc_type& alloc) : base_type(alloc) {} + + //-------------------------------------------------------------------- + span_image_filter_gray_2x2(alloc_type& alloc, + const rendering_buffer& src, + const color_type& back_color, + interpolator_type& inter, + const image_filter_lut& filter) : + base_type(alloc, src, back_color, inter, &filter) + {} + + //-------------------------------------------------------------------- + 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; + calc_type src_alpha; + value_type back_v = base_type::background_color().v; + value_type back_a = base_type::background_color().a; + + const value_type *fg_ptr; + + 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); + + int maxx = base_type::source_image().width() - 1; + int maxy = base_type::source_image().height() - 1; + + 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; + + if(x_lr >= 0 && y_lr >= 0 && + x_lr < maxx && y_lr < maxy) + { + fg = image_filter_size / 2; + + x_hr &= image_subpixel_mask; + y_hr &= image_subpixel_mask; + fg_ptr = (const value_type*)base_type::source_image().row(y_lr) + x_lr; + + fg += *fg_ptr++ * ((weight_array[x_hr + image_subpixel_size] * + weight_array[y_hr + image_subpixel_size] + + image_filter_size / 2) >> + image_filter_shift); + fg += *fg_ptr++ * ((weight_array[x_hr] * + weight_array[y_hr + image_subpixel_size] + + image_filter_size / 2) >> + image_filter_shift); + + fg_ptr = (const value_type*)base_type::source_image().next_row(fg_ptr - 2); + + fg += *fg_ptr++ * ((weight_array[x_hr + image_subpixel_size] * + weight_array[y_hr] + + image_filter_size / 2) >> + image_filter_shift); + fg += *fg_ptr++ * ((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; + src_alpha = base_mask; + } + else + { + unsigned weight; + if(x_lr < -1 || y_lr < -1 || + x_lr > maxx || y_lr > maxy) + { + fg = back_v; + src_alpha = back_a; + } + else + { + fg = src_alpha = image_filter_size / 2; + + x_hr &= image_subpixel_mask; + y_hr &= image_subpixel_mask; + + weight = (weight_array[x_hr + image_subpixel_size] * + weight_array[y_hr + image_subpixel_size] + + image_filter_size / 2) >> + image_filter_shift; + if(x_lr >= 0 && y_lr >= 0 && + x_lr <= maxx && y_lr <= maxy) + { + fg += weight * *((const value_type*)base_type::source_image().row(y_lr) + x_lr); + src_alpha += weight * base_mask; + } + else + { + fg += back_v * weight; + src_alpha += back_a * weight; + } + + x_lr++; + + weight = (weight_array[x_hr] * + weight_array[y_hr + image_subpixel_size] + + image_filter_size / 2) >> + image_filter_shift; + if(x_lr >= 0 && y_lr >= 0 && + x_lr <= maxx && y_lr <= maxy) + { + fg += weight * *((const value_type*)base_type::source_image().row(y_lr) + x_lr); + src_alpha += weight * base_mask; + } + else + { + fg += back_v * weight; + src_alpha += back_a * weight; + } + + x_lr--; + y_lr++; + + weight = (weight_array[x_hr + image_subpixel_size] * + weight_array[y_hr] + + image_filter_size / 2) >> + image_filter_shift; + if(x_lr >= 0 && y_lr >= 0 && + x_lr <= maxx && y_lr <= maxy) + { + fg += weight * *((const value_type*)base_type::source_image().row(y_lr) + x_lr); + src_alpha += weight * base_mask; + } + else + { + fg += back_v * weight; + src_alpha += back_a * weight; + } + + x_lr++; + + weight = (weight_array[x_hr] * + weight_array[y_hr] + + image_filter_size / 2) >> + image_filter_shift; + if(x_lr >= 0 && y_lr >= 0 && + x_lr <= maxx && y_lr <= maxy) + { + fg += weight * *((const value_type*)base_type::source_image().row(y_lr) + x_lr); + src_alpha += weight * base_mask; + } + else + { + fg += back_v * weight; + src_alpha += back_a * weight; + } + fg >>= image_filter_shift; + src_alpha >>= image_filter_shift; + + if(src_alpha > base_mask) src_alpha = base_mask; + if(fg > src_alpha) fg = src_alpha; + + } + } + + span->v = (value_type)fg; + span->a = (value_type)src_alpha; + ++span; + ++base_type::interpolator(); + + } while(--len); + + return base_type::allocator().span(); + } + }; + + + + + + + + + + + + + //================================================span_image_filter_gray + template<class ColorT, + class Interpolator, + class Allocator = span_allocator<ColorT> > + class span_image_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_image_filter_gray(alloc_type& alloc) : base_type(alloc) {} + + //-------------------------------------------------------------------- + span_image_filter_gray(alloc_type& alloc, + const rendering_buffer& src, + const color_type& back_color, + interpolator_type& inter, + const image_filter_lut& filter) : + base_type(alloc, src, back_color, inter, &filter) + {} + + //-------------------------------------------------------------------- + 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; + int src_alpha; + value_type back_v = base_type::background_color().v; + value_type back_a = base_type::background_color().a; + + const value_type* fg_ptr; + + unsigned diameter = base_type::filter().diameter(); + int start = base_type::filter().start(); + int start1 = start - 1; + const int16* weight_array = base_type::filter().weight_array(); + + color_type* span = base_type::allocator().span(); + + int maxx = base_type::source_image().width() + start - 2; + int maxy = base_type::source_image().height() + start - 2; + + int maxx2 = base_type::source_image().width() - start - 1; + int maxy2 = base_type::source_image().height() - start - 1; + + 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_lr = x_hr >> image_subpixel_shift; + int y_lr = y_hr >> image_subpixel_shift; + + fg = image_filter_size / 2; + + int x_fract = x_hr & image_subpixel_mask; + unsigned y_count = diameter; + + if(x_lr >= -start && y_lr >= -start && + x_lr <= maxx && y_lr <= maxy) + { + y_hr = image_subpixel_mask - (y_hr & image_subpixel_mask); + fg_ptr = (const value_type*)base_type::source_image().row(y_lr + start) + x_lr + start; + do + { + x_count = diameter; + weight_y = weight_array[y_hr]; + x_hr = image_subpixel_mask - x_fract; + + do + { + fg += *fg_ptr++ * ((weight_y * weight_array[x_hr] + + image_filter_size / 2) >> + image_filter_shift); + x_hr += image_subpixel_size; + + } while(--x_count); + + y_hr += image_subpixel_size; + fg_ptr = (const value_type*)base_type::source_image().next_row(fg_ptr - diameter); + + } while(--y_count); + + fg >>= image_filter_shift; + + if(fg < 0) fg = 0; + if(fg > base_mask) fg = base_mask; + src_alpha = base_mask; + } + else + { + if(x_lr < start1 || y_lr < start1 || + x_lr > maxx2 || y_lr > maxy2) + { + fg = back_v; + src_alpha = back_a; + } + else + { + src_alpha = image_filter_size / 2; + y_lr = (y >> image_subpixel_shift) + start; + y_hr = image_subpixel_mask - (y_hr & image_subpixel_mask); + + do + { + x_count = diameter; + weight_y = weight_array[y_hr]; + x_lr = (x >> image_subpixel_shift) + start; + x_hr = image_subpixel_mask - x_fract; + + do + { + int weight = (weight_y * weight_array[x_hr] + + image_filter_size / 2) >> + image_filter_shift; + + if(x_lr >= 0 && y_lr >= 0 && + x_lr < int(base_type::source_image().width()) && + y_lr < int(base_type::source_image().height())) + { + fg_ptr = (const value_type*)base_type::source_image().row(y_lr) + x_lr; + fg += *fg_ptr++ * weight; + src_alpha += base_mask * weight; + } + else + { + fg += back_v * weight; + src_alpha += back_a * weight; + } + x_hr += image_subpixel_size; + x_lr++; + + } while(--x_count); + + y_hr += image_subpixel_size; + y_lr++; + + } while(--y_count); + + + fg >>= image_filter_shift; + src_alpha >>= image_filter_shift; + + if(fg < 0) fg = 0; + if(src_alpha < 0) src_alpha = 0; + + if(src_alpha > base_mask) src_alpha = base_mask; + if(fg > src_alpha) fg = src_alpha; + } + } + + span->v = (value_type)fg; + span->a = (value_type)src_alpha; + + ++span; + ++base_type::interpolator(); + + } while(--len); + + return base_type::allocator().span(); + } + }; + + + +} + + +#endif + + + |