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163 lines
4.0 KiB
163 lines
4.0 KiB
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//---------------------------------------------------------------------------- |
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// Anti-Grain Geometry - Version 2.3 |
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// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com) |
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// |
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// Permission to copy, use, modify, sell and distribute this software |
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// is granted provided this copyright notice appears in all copies. |
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// This software is provided "as is" without express or implied |
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// warranty, and with no claim as to its suitability for any purpose. |
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// |
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//---------------------------------------------------------------------------- |
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// Contact: mcseem@antigrain.com |
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// mcseemagg@yahoo.com |
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// http://www.antigrain.com |
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//---------------------------------------------------------------------------- |
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// |
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// class renderer_base |
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// |
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//---------------------------------------------------------------------------- |
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#ifndef AGG_RENDERER_BASE_INCLUDED |
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#define AGG_RENDERER_BASE_INCLUDED |
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#include "agg_basics.h" |
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#include "agg_rendering_buffer.h" |
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namespace agg |
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{ |
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template<class PixelFormat> class renderer_base |
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{ |
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public: |
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typedef PixelFormat pixfmt_type; |
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typedef typename pixfmt_type::color_type color_type; |
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typedef typename pixfmt_type::row_data row_data; |
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typedef typename pixfmt_type::span_data span_data; |
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renderer_base() : m_ren(0), m_clip_box(1, 1, 0, 0) {} |
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renderer_base(pixfmt_type& ren) : |
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m_ren(&ren), |
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m_clip_box(0, 0, ren.width() - 1, ren.height() - 1) |
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{} |
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void attach(pixfmt_type& ren) |
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{ |
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m_ren = &ren; |
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m_clip_box = rect(0, 0, ren.width() - 1, ren.height() - 1); |
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} |
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const pixfmt_type& ren() const |
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{ |
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return *m_ren; |
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} |
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pixfmt_type& ren() |
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{ |
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return *m_ren; |
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} |
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unsigned width() const |
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{ |
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return m_ren->width(); |
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} |
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unsigned height() const |
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{ |
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return m_ren->height(); |
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} |
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void first_clip_box() {} |
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bool next_clip_box() |
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{ |
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return false; |
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} |
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const rect& clip_box() const |
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{ |
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return m_clip_box; |
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} |
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int xmin() const |
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{ |
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return m_clip_box.x1; |
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} |
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int ymin() const |
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{ |
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return m_clip_box.y1; |
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} |
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int xmax() const |
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{ |
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return m_clip_box.x2; |
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} |
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int ymax() const |
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{ |
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return m_clip_box.y2; |
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} |
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const rect& bounding_clip_box() const |
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{ |
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return m_clip_box; |
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} |
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int bounding_xmin() const |
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{ |
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return m_clip_box.x1; |
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} |
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int bounding_ymin() const |
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{ |
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return m_clip_box.y1; |
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} |
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int bounding_xmax() const |
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{ |
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return m_clip_box.x2; |
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} |
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int bounding_ymax() const |
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{ |
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return m_clip_box.y2; |
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} |
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void blend_hline(int x1, int y, int x2, |
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const color_type& c, cover_type cover) |
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{ |
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if(x1 > x2) { |
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int t = x2; |
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x2 = x1; |
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x1 = t; |
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} |
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if(y > ymax()) { |
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return; |
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} |
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if(y < ymin()) { |
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return; |
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} |
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if(x1 > xmax()) { |
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return; |
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} |
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if(x2 < xmin()) { |
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return; |
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} |
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if(x1 < xmin()) { |
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x1 = xmin(); |
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} |
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if(x2 > xmax()) { |
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x2 = xmax(); |
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} |
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m_ren->blend_hline(x1, y, x2 - x1 + 1, c, cover); |
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} |
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void blend_solid_hspan(int x, int y, int len, |
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const color_type& c, |
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const cover_type* covers) |
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{ |
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if(y > ymax()) { |
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return; |
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} |
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if(y < ymin()) { |
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return; |
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} |
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if(x < xmin()) { |
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len -= xmin() - x; |
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if(len <= 0) { |
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return; |
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} |
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covers += xmin() - x; |
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x = xmin(); |
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} |
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if(x + len > xmax()) { |
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len = xmax() - x + 1; |
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if(len <= 0) { |
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return; |
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} |
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} |
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m_ren->blend_solid_hspan(x, y, len, c, covers); |
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} |
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private: |
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pixfmt_type* m_ren; |
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rect m_clip_box; |
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}; |
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} |
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#endif
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