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Diffstat (limited to 'agg/inc/agg_renderer_outline_image.h')
-rwxr-xr-x | agg/inc/agg_renderer_outline_image.h | 924 |
1 files changed, 924 insertions, 0 deletions
diff --git a/agg/inc/agg_renderer_outline_image.h b/agg/inc/agg_renderer_outline_image.h new file mode 100755 index 000000000000..d5cd3992448c --- /dev/null +++ b/agg/inc/agg_renderer_outline_image.h @@ -0,0 +1,924 @@ +//---------------------------------------------------------------------------- +// 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 +//---------------------------------------------------------------------------- +#ifndef AGG_RENDERER_OUTLINE_IMAGE_INCLUDED +#define AGG_RENDERER_OUTLINE_IMAGE_INCLUDED + +#include <math.h> +#include "agg_line_aa_basics.h" +#include "agg_dda_line.h" +#include "agg_rendering_buffer.h" + + +namespace agg +{ + //========================================================line_image_scale + template<class Source> class line_image_scale + { + public: + typedef typename Source::color_type color_type; + + line_image_scale(const Source& src, double height) : + m_source(src), + m_height(height), + m_scale(src.height() / height) + { + } + + double width() const { return m_source.width(); } + double height() const { return m_height; } + + color_type pixel(int x, int y) const + { + double src_y = (y + 0.5) * m_scale - 0.5; + int h = int(m_source.height()) - 1; + int y1 = int(floor(src_y)); + int y2 = y1 + 1; + color_type pix1 = (y1 < 0) ? color_type::no_color() : m_source.pixel(x, y1); + color_type pix2 = (y2 > h) ? color_type::no_color() : m_source.pixel(x, y2); + return pix1.gradient(pix2, src_y - y1); + } + + private: + line_image_scale(const line_image_scale<Source>&); + const line_image_scale<Source>& operator = (const line_image_scale<Source>&); + + const Source& m_source; + double m_height; + double m_scale; + }; + + + + //======================================================line_image_pattern + template<class Filter> class line_image_pattern + { + public: + typedef Filter filter_type; + typedef typename filter_type::color_type color_type; + + //-------------------------------------------------------------------- + ~line_image_pattern() + { + delete [] m_data; + } + + //-------------------------------------------------------------------- + line_image_pattern(const Filter& filter) : + m_filter(&filter), + m_dilation(filter.dilation() + 1), + m_dilation_hr(m_dilation << line_subpixel_shift), + m_data(0), + m_width(0), + m_height(0), + m_width_hr(0), + m_half_height_hr(0), + m_offset_y_hr(0) + { + } + + // Create + //-------------------------------------------------------------------- + template<class Source> + line_image_pattern(const Filter& filter, const Source& src) : + m_filter(&filter), + m_dilation(filter.dilation() + 1), + m_dilation_hr(m_dilation << line_subpixel_shift), + m_data(0), + m_width(0), + m_height(0), + m_width_hr(0), + m_half_height_hr(0), + m_offset_y_hr(0) + { + create(src); + } + + // Create + //-------------------------------------------------------------------- + template<class Source> void create(const Source& src) + { + m_height = unsigned(ceil((double)src.height())); + m_width = unsigned(ceil((double)src.width())); + m_width_hr = int(src.width() * line_subpixel_size); + m_half_height_hr = int(src.height() * line_subpixel_size/2); + m_offset_y_hr = m_dilation_hr + m_half_height_hr - line_subpixel_size/2; + m_half_height_hr += line_subpixel_size/2; + + delete [] m_data; + m_data = new color_type [(m_width + m_dilation * 2) * (m_height + m_dilation * 2)]; + + m_buf.attach(m_data, m_width + m_dilation * 2, + m_height + m_dilation * 2, + m_width + m_dilation * 2); + unsigned x, y; + color_type* d1; + color_type* d2; + for(y = 0; y < m_height; y++) + { + d1 = m_buf.row(y + m_dilation) + m_dilation; + for(x = 0; x < m_width; x++) + { + *d1++ = src.pixel(x, y); + } + } + + const color_type* s1; + const color_type* s2; + for(y = 0; y < m_dilation; y++) + { + //s1 = m_buf.row(m_height + m_dilation - 1) + m_dilation; + //s2 = m_buf.row(m_dilation) + m_dilation; + d1 = m_buf.row(m_dilation + m_height + y) + m_dilation; + d2 = m_buf.row(m_dilation - y - 1) + m_dilation; + for(x = 0; x < m_width; x++) + { + //*d1++ = color_type(*s1++, 0); + //*d2++ = color_type(*s2++, 0); + *d1++ = color_type::no_color(); + *d2++ = color_type::no_color(); + } + } + + unsigned h = m_height + m_dilation * 2; + for(y = 0; y < h; y++) + { + s1 = m_buf.row(y) + m_dilation; + s2 = m_buf.row(y) + m_dilation + m_width; + d1 = m_buf.row(y) + m_dilation + m_width; + d2 = m_buf.row(y) + m_dilation; + + for(x = 0; x < m_dilation; x++) + { + *d1++ = *s1++; + *--d2 = *--s2; + } + } + } + + //-------------------------------------------------------------------- + int pattern_width() const { return m_width_hr; } + int line_width() const { return m_half_height_hr; } + + //-------------------------------------------------------------------- + void pixel(color_type* p, int x, int y) const + { + m_filter->pixel_high_res(m_buf.rows(), + p, + x % m_width_hr + m_dilation_hr, + y + m_offset_y_hr); + } + + //-------------------------------------------------------------------- + const filter_type& filter() const { return *m_filter; } + + private: + line_image_pattern(const line_image_pattern<filter_type>&); + const line_image_pattern<filter_type>& + operator = (const line_image_pattern<filter_type>&); + + protected: + row_ptr_cache<color_type> m_buf; + const filter_type* m_filter; + unsigned m_dilation; + int m_dilation_hr; + color_type* m_data; + unsigned m_width; + unsigned m_height; + int m_width_hr; + int m_half_height_hr; + int m_offset_y_hr; + }; + + + + + + + //=================================================line_image_pattern_pow2 + template<class Filter> class line_image_pattern_pow2 : + public line_image_pattern<Filter> + { + public: + typedef Filter filter_type; + typedef typename filter_type::color_type color_type; + typedef line_image_pattern<Filter> base_type; + + //-------------------------------------------------------------------- + line_image_pattern_pow2(const Filter& filter) : + line_image_pattern<Filter>(filter), m_mask(line_subpixel_mask) {} + + //-------------------------------------------------------------------- + template<class Source> + line_image_pattern_pow2(const Filter& filter, const Source& src) : + line_image_pattern<Filter>(filter), m_mask(line_subpixel_mask) + { + create(src); + } + + //-------------------------------------------------------------------- + template<class Source> void create(const Source& src) + { + line_image_pattern<Filter>::create(src); + m_mask = 1; + while(m_mask < base_type::m_width) + { + m_mask <<= 1; + m_mask |= 1; + } + m_mask <<= line_subpixel_shift - 1; + m_mask |= line_subpixel_mask; + base_type::m_width_hr = m_mask + 1; + } + + //-------------------------------------------------------------------- + void pixel(color_type* p, int x, int y) const + { + base_type::m_filter->pixel_high_res( + base_type::m_buf.rows(), + p, + (x & m_mask) + base_type::m_dilation_hr, + y + base_type::m_offset_y_hr); + } + private: + unsigned m_mask; + }; + + + + + + + + //===================================================distance_interpolator4 + class distance_interpolator4 + { + public: + //--------------------------------------------------------------------- + distance_interpolator4() {} + distance_interpolator4(int x1, int y1, int x2, int y2, + int sx, int sy, int ex, int ey, + int len, double scale, int x, int y) : + m_dx(x2 - x1), + m_dy(y2 - y1), + m_dx_start(line_mr(sx) - line_mr(x1)), + m_dy_start(line_mr(sy) - line_mr(y1)), + m_dx_end(line_mr(ex) - line_mr(x2)), + m_dy_end(line_mr(ey) - line_mr(y2)), + + m_dist(int(double(x + line_subpixel_size/2 - x2) * double(m_dy) - + double(y + line_subpixel_size/2 - y2) * double(m_dx))), + + m_dist_start((line_mr(x + line_subpixel_size/2) - line_mr(sx)) * m_dy_start - + (line_mr(y + line_subpixel_size/2) - line_mr(sy)) * m_dx_start), + + m_dist_end((line_mr(x + line_subpixel_size/2) - line_mr(ex)) * m_dy_end - + (line_mr(y + line_subpixel_size/2) - line_mr(ey)) * m_dx_end), + m_len(int(len / scale)) + { + double d = len * scale; + int dx = int(((x2 - x1) << line_subpixel_shift) / d); + int dy = int(((y2 - y1) << line_subpixel_shift) / d); + m_dx_pict = -dy; + m_dy_pict = dx; + m_dist_pict = ((x + line_subpixel_size/2 - (x1 - dy)) * m_dy_pict - + (y + line_subpixel_size/2 - (y1 + dx)) * m_dx_pict) >> + line_subpixel_shift; + + m_dx <<= line_subpixel_shift; + m_dy <<= line_subpixel_shift; + m_dx_start <<= line_mr_subpixel_shift; + m_dy_start <<= line_mr_subpixel_shift; + m_dx_end <<= line_mr_subpixel_shift; + m_dy_end <<= line_mr_subpixel_shift; + } + + //--------------------------------------------------------------------- + void inc_x() + { + m_dist += m_dy; + m_dist_start += m_dy_start; + m_dist_pict += m_dy_pict; + m_dist_end += m_dy_end; + } + + //--------------------------------------------------------------------- + void dec_x() + { + m_dist -= m_dy; + m_dist_start -= m_dy_start; + m_dist_pict -= m_dy_pict; + m_dist_end -= m_dy_end; + } + + //--------------------------------------------------------------------- + void inc_y() + { + m_dist -= m_dx; + m_dist_start -= m_dx_start; + m_dist_pict -= m_dx_pict; + m_dist_end -= m_dx_end; + } + + //--------------------------------------------------------------------- + void dec_y() + { + m_dist += m_dx; + m_dist_start += m_dx_start; + m_dist_pict += m_dx_pict; + m_dist_end += m_dx_end; + } + + //--------------------------------------------------------------------- + void inc_x(int dy) + { + m_dist += m_dy; + m_dist_start += m_dy_start; + m_dist_pict += m_dy_pict; + m_dist_end += m_dy_end; + if(dy > 0) + { + m_dist -= m_dx; + m_dist_start -= m_dx_start; + m_dist_pict -= m_dx_pict; + m_dist_end -= m_dx_end; + } + if(dy < 0) + { + m_dist += m_dx; + m_dist_start += m_dx_start; + m_dist_pict += m_dx_pict; + m_dist_end += m_dx_end; + } + } + + //--------------------------------------------------------------------- + void dec_x(int dy) + { + m_dist -= m_dy; + m_dist_start -= m_dy_start; + m_dist_pict -= m_dy_pict; + m_dist_end -= m_dy_end; + if(dy > 0) + { + m_dist -= m_dx; + m_dist_start -= m_dx_start; + m_dist_pict -= m_dx_pict; + m_dist_end -= m_dx_end; + } + if(dy < 0) + { + m_dist += m_dx; + m_dist_start += m_dx_start; + m_dist_pict += m_dx_pict; + m_dist_end += m_dx_end; + } + } + + //--------------------------------------------------------------------- + void inc_y(int dx) + { + m_dist -= m_dx; + m_dist_start -= m_dx_start; + m_dist_pict -= m_dx_pict; + m_dist_end -= m_dx_end; + if(dx > 0) + { + m_dist += m_dy; + m_dist_start += m_dy_start; + m_dist_pict += m_dy_pict; + m_dist_end += m_dy_end; + } + if(dx < 0) + { + m_dist -= m_dy; + m_dist_start -= m_dy_start; + m_dist_pict -= m_dy_pict; + m_dist_end -= m_dy_end; + } + } + + //--------------------------------------------------------------------- + void dec_y(int dx) + { + m_dist += m_dx; + m_dist_start += m_dx_start; + m_dist_pict += m_dx_pict; + m_dist_end += m_dx_end; + if(dx > 0) + { + m_dist += m_dy; + m_dist_start += m_dy_start; + m_dist_pict += m_dy_pict; + m_dist_end += m_dy_end; + } + if(dx < 0) + { + m_dist -= m_dy; + m_dist_start -= m_dy_start; + m_dist_pict -= m_dy_pict; + m_dist_end -= m_dy_end; + } + } + + //--------------------------------------------------------------------- + int dist() const { return m_dist; } + int dist_start() const { return m_dist_start; } + int dist_pict() const { return m_dist_pict; } + int dist_end() const { return m_dist_end; } + + //--------------------------------------------------------------------- + int dx() const { return m_dx; } + int dy() const { return m_dy; } + int dx_start() const { return m_dx_start; } + int dy_start() const { return m_dy_start; } + int dx_pict() const { return m_dx_pict; } + int dy_pict() const { return m_dy_pict; } + int dx_end() const { return m_dx_end; } + int dy_end() const { return m_dy_end; } + int len() const { return m_len; } + + private: + //--------------------------------------------------------------------- + int m_dx; + int m_dy; + int m_dx_start; + int m_dy_start; + int m_dx_pict; + int m_dy_pict; + int m_dx_end; + int m_dy_end; + + int m_dist; + int m_dist_start; + int m_dist_pict; + int m_dist_end; + int m_len; + }; + + + + + + //==================================================line_interpolator_image + template<class Renderer> class line_interpolator_image + { + public: + typedef Renderer renderer_type; + typedef typename Renderer::color_type color_type; + + //--------------------------------------------------------------------- + enum + { + max_half_width = 64 + }; + + //--------------------------------------------------------------------- + line_interpolator_image(renderer_type& ren, const line_parameters& lp, + int sx, int sy, int ex, int ey, + int pattern_start, + double scale_x) : + m_lp(lp), + m_li(lp.vertical ? line_dbl_hr(lp.x2 - lp.x1) : + line_dbl_hr(lp.y2 - lp.y1), + lp.vertical ? abs(lp.y2 - lp.y1) : + abs(lp.x2 - lp.x1) + 1), + m_di(lp.x1, lp.y1, lp.x2, lp.y2, sx, sy, ex, ey, lp.len, scale_x, + lp.x1 & ~line_subpixel_mask, lp.y1 & ~line_subpixel_mask), + m_ren(ren), + m_x(lp.x1 >> line_subpixel_shift), + m_y(lp.y1 >> line_subpixel_shift), + m_old_x(m_x), + m_old_y(m_y), + m_count((lp.vertical ? abs((lp.y2 >> line_subpixel_shift) - m_y) : + abs((lp.x2 >> line_subpixel_shift) - m_x))), + m_width(ren.subpixel_width()), + m_max_extent(m_width >> (line_subpixel_shift - 2)), + m_start(pattern_start + (m_max_extent + 2) * ren.pattern_width()), + m_step(0) + { + agg::dda2_line_interpolator li(0, lp.vertical ? + (lp.dy << agg::line_subpixel_shift) : + (lp.dx << agg::line_subpixel_shift), + lp.len); + + unsigned i; + int stop = m_width + line_subpixel_size * 2; + for(i = 0; i < max_half_width; ++i) + { + m_dist_pos[i] = li.y(); + if(m_dist_pos[i] >= stop) break; + ++li; + } + m_dist_pos[i] = 0x7FFF0000; + + int dist1_start; + int dist2_start; + int npix = 1; + + if(lp.vertical) + { + do + { + --m_li; + m_y -= lp.inc; + m_x = (m_lp.x1 + m_li.y()) >> line_subpixel_shift; + + if(lp.inc > 0) m_di.dec_y(m_x - m_old_x); + else m_di.inc_y(m_x - m_old_x); + + m_old_x = m_x; + + dist1_start = dist2_start = m_di.dist_start(); + + int dx = 0; + if(dist1_start < 0) ++npix; + do + { + dist1_start += m_di.dy_start(); + dist2_start -= m_di.dy_start(); + if(dist1_start < 0) ++npix; + if(dist2_start < 0) ++npix; + ++dx; + } + while(m_dist_pos[dx] <= m_width); + if(npix == 0) break; + + npix = 0; + } + while(--m_step >= -m_max_extent); + } + else + { + do + { + --m_li; + + m_x -= lp.inc; + m_y = (m_lp.y1 + m_li.y()) >> line_subpixel_shift; + + if(lp.inc > 0) m_di.dec_x(m_y - m_old_y); + else m_di.inc_x(m_y - m_old_y); + + m_old_y = m_y; + + dist1_start = dist2_start = m_di.dist_start(); + + int dy = 0; + if(dist1_start < 0) ++npix; + do + { + dist1_start -= m_di.dx_start(); + dist2_start += m_di.dx_start(); + if(dist1_start < 0) ++npix; + if(dist2_start < 0) ++npix; + ++dy; + } + while(m_dist_pos[dy] <= m_width); + if(npix == 0) break; + + npix = 0; + } + while(--m_step >= -m_max_extent); + } + m_li.adjust_forward(); + m_step -= m_max_extent; + } + + //--------------------------------------------------------------------- + bool step_hor() + { + ++m_li; + m_x += m_lp.inc; + m_y = (m_lp.y1 + m_li.y()) >> line_subpixel_shift; + + if(m_lp.inc > 0) m_di.inc_x(m_y - m_old_y); + else m_di.dec_x(m_y - m_old_y); + + m_old_y = m_y; + + int s1 = m_di.dist() / m_lp.len; + int s2 = -s1; + + if(m_lp.inc < 0) s1 = -s1; + + int dist_start; + int dist_pict; + int dist_end; + int dy; + int dist; + + dist_start = m_di.dist_start(); + dist_pict = m_di.dist_pict() + m_start; + dist_end = m_di.dist_end(); + color_type* p0 = m_colors + max_half_width + 2; + color_type* p1 = p0; + + int npix = 0; + p1->clear(); + if(dist_end > 0) + { + if(dist_start <= 0) + { + m_ren.pixel(p1, dist_pict, s2); + } + ++npix; + } + ++p1; + + dy = 1; + while((dist = m_dist_pos[dy]) - s1 <= m_width) + { + dist_start -= m_di.dx_start(); + dist_pict -= m_di.dx_pict(); + dist_end -= m_di.dx_end(); + p1->clear(); + if(dist_end > 0 && dist_start <= 0) + { + if(m_lp.inc > 0) dist = -dist; + m_ren.pixel(p1, dist_pict, s2 - dist); + ++npix; + } + ++p1; + ++dy; + } + + dy = 1; + dist_start = m_di.dist_start(); + dist_pict = m_di.dist_pict() + m_start; + dist_end = m_di.dist_end(); + while((dist = m_dist_pos[dy]) + s1 <= m_width) + { + dist_start += m_di.dx_start(); + dist_pict += m_di.dx_pict(); + dist_end += m_di.dx_end(); + --p0; + p0->clear(); + if(dist_end > 0 && dist_start <= 0) + { + if(m_lp.inc > 0) dist = -dist; + m_ren.pixel(p0, dist_pict, s2 + dist); + ++npix; + } + ++dy; + } + m_ren.blend_color_vspan(m_x, + m_y - dy + 1, + unsigned(p1 - p0), + p0); + return npix && ++m_step < m_count; + } + + + + //--------------------------------------------------------------------- + bool step_ver() + { + ++m_li; + m_y += m_lp.inc; + m_x = (m_lp.x1 + m_li.y()) >> line_subpixel_shift; + + if(m_lp.inc > 0) m_di.inc_y(m_x - m_old_x); + else m_di.dec_y(m_x - m_old_x); + + m_old_x = m_x; + + int s1 = m_di.dist() / m_lp.len; + int s2 = -s1; + + if(m_lp.inc > 0) s1 = -s1; + + int dist_start; + int dist_pict; + int dist_end; + int dist; + int dx; + + dist_start = m_di.dist_start(); + dist_pict = m_di.dist_pict() + m_start; + dist_end = m_di.dist_end(); + color_type* p0 = m_colors + max_half_width + 2; + color_type* p1 = p0; + + int npix = 0; + p1->clear(); + if(dist_end > 0) + { + if(dist_start <= 0) + { + m_ren.pixel(p1, dist_pict, s2); + } + ++npix; + } + ++p1; + + dx = 1; + while((dist = m_dist_pos[dx]) - s1 <= m_width) + { + dist_start += m_di.dy_start(); + dist_pict += m_di.dy_pict(); + dist_end += m_di.dy_end(); + p1->clear(); + if(dist_end > 0 && dist_start <= 0) + { + if(m_lp.inc > 0) dist = -dist; + m_ren.pixel(p1, dist_pict, s2 + dist); + ++npix; + } + ++p1; + ++dx; + } + + dx = 1; + dist_start = m_di.dist_start(); + dist_pict = m_di.dist_pict() + m_start; + dist_end = m_di.dist_end(); + while((dist = m_dist_pos[dx]) + s1 <= m_width) + { + dist_start -= m_di.dy_start(); + dist_pict -= m_di.dy_pict(); + dist_end -= m_di.dy_end(); + --p0; + p0->clear(); + if(dist_end > 0 && dist_start <= 0) + { + if(m_lp.inc > 0) dist = -dist; + m_ren.pixel(p0, dist_pict, s2 - dist); + ++npix; + } + ++dx; + } + m_ren.blend_color_hspan(m_x - dx + 1, + m_y, + unsigned(p1 - p0), + p0); + return npix && ++m_step < m_count; + } + + + //--------------------------------------------------------------------- + int pattern_end() const { return m_start + m_di.len(); } + + //--------------------------------------------------------------------- + bool vertical() const { return m_lp.vertical; } + int width() const { return m_width; } + int count() const { return m_count; } + + private: + line_interpolator_image(const line_interpolator_image<Renderer>&); + const line_interpolator_image<Renderer>& + operator = (const line_interpolator_image<Renderer>&); + + protected: + const line_parameters& m_lp; + dda2_line_interpolator m_li; + distance_interpolator4 m_di; + renderer_type& m_ren; + int m_plen; + int m_x; + int m_y; + int m_old_x; + int m_old_y; + int m_count; + int m_width; + int m_max_extent; + int m_start; + int m_step; + int m_dist_pos[max_half_width + 1]; + color_type m_colors[max_half_width * 2 + 4]; + }; + + + + + + + + + //===================================================renderer_outline_image + template<class BaseRenderer, class ImagePattern> + class renderer_outline_image + { + public: + //--------------------------------------------------------------------- + typedef BaseRenderer base_ren_type; + typedef renderer_outline_image<BaseRenderer, ImagePattern> self_type; + typedef typename base_ren_type::color_type color_type; + typedef ImagePattern pattern_type; + + + //--------------------------------------------------------------------- + renderer_outline_image(base_ren_type& ren, const pattern_type& patt) : + m_ren(&ren), + m_pattern(&patt), + m_start(0), + m_scale_x(1.0) + { + } + + //--------------------------------------------------------------------- + void pattern(const pattern_type& p) { m_pattern = &p; } + const pattern_type& pattern() const { return *m_pattern; } + + //--------------------------------------------------------------------- + void scale_x(double s) { m_scale_x = s; } + double scale_x() const { return m_scale_x; } + + //--------------------------------------------------------------------- + void start_x(double s) { m_start = int(s * line_subpixel_size); } + double start_x() const { return double(m_start) / line_subpixel_size; } + + //--------------------------------------------------------------------- + int subpixel_width() const { return m_pattern->line_width(); } + int pattern_width() const { return m_pattern->pattern_width(); } + + //------------------------------------------------------------------------- + void pixel(color_type* p, int x, int y) const + { + m_pattern->pixel(p, x, y); + } + + //------------------------------------------------------------------------- + void blend_color_hspan(int x, int y, unsigned len, const color_type* colors) + { + m_ren->blend_color_hspan(x, y, len, colors, 0); + } + + //------------------------------------------------------------------------- + void blend_color_vspan(int x, int y, unsigned len, const color_type* colors) + { + m_ren->blend_color_vspan(x, y, len, colors, 0); + } + + //------------------------------------------------------------------------- + static bool accurate_join_only() { return true; } + + //------------------------------------------------------------------------- + template<class Cmp> + void semidot(Cmp, int, int, int, int) + { + } + + //------------------------------------------------------------------------- + void line0(const line_parameters&) + { + } + + //------------------------------------------------------------------------- + void line1(const line_parameters&, int, int) + { + } + + //------------------------------------------------------------------------- + void line2(const line_parameters&, int, int) + { + } + + //------------------------------------------------------------------------- + void line3(const line_parameters& lp, + int sx, int sy, int ex, int ey) + { + fix_degenerate_bisectrix_start(lp, &sx, &sy); + fix_degenerate_bisectrix_end(lp, &ex, &ey); + line_interpolator_image<self_type> li(*this, lp, + sx, sy, + ex, ey, + m_start, m_scale_x); + if(li.vertical()) + { + while(li.step_ver()); + } + else + { + while(li.step_hor()); + } + m_start = li.pattern_end(); + } + + private: + base_ren_type* m_ren; + const pattern_type* m_pattern; + int m_start; + double m_scale_x; + }; + + + + + +} + + + +#endif |