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731 lines
25 KiB
731 lines
25 KiB
//---------------------------------------------------------------------------- |
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// Anti-Grain Geometry - Version 2.4 |
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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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|
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#ifndef AGG_RENDERER_BASE_INCLUDED |
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#define AGG_RENDERER_BASE_INCLUDED |
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|
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#include "agg_basics.h" |
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#include "agg_rendering_buffer.h" |
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|
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namespace agg |
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{ |
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//-----------------------------------------------------------renderer_base |
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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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//-------------------------------------------------------------------- |
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renderer_base() : m_ren(0), m_clip_box(1, 1, 0, 0) {} |
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explicit 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_i(0, 0, ren.width() - 1, ren.height() - 1); |
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} |
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//-------------------------------------------------------------------- |
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const pixfmt_type& ren() const { return *m_ren; } |
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pixfmt_type& ren() { return *m_ren; } |
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|
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//-------------------------------------------------------------------- |
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unsigned width() const { return m_ren->width(); } |
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unsigned height() const { return m_ren->height(); } |
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|
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//-------------------------------------------------------------------- |
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bool clip_box(int x1, int y1, int x2, int y2) |
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{ |
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rect_i cb(x1, y1, x2, y2); |
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cb.normalize(); |
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if(cb.clip(rect_i(0, 0, width() - 1, height() - 1))) |
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{ |
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m_clip_box = cb; |
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return true; |
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} |
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m_clip_box.x1 = 1; |
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m_clip_box.y1 = 1; |
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m_clip_box.x2 = 0; |
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m_clip_box.y2 = 0; |
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return false; |
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} |
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|
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//-------------------------------------------------------------------- |
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void reset_clipping(bool visibility) |
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{ |
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if(visibility) |
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{ |
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m_clip_box.x1 = 0; |
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m_clip_box.y1 = 0; |
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m_clip_box.x2 = width() - 1; |
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m_clip_box.y2 = height() - 1; |
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} |
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else |
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{ |
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m_clip_box.x1 = 1; |
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m_clip_box.y1 = 1; |
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m_clip_box.x2 = 0; |
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m_clip_box.y2 = 0; |
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} |
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} |
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|
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//-------------------------------------------------------------------- |
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void clip_box_naked(int x1, int y1, int x2, int y2) |
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{ |
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m_clip_box.x1 = x1; |
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m_clip_box.y1 = y1; |
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m_clip_box.x2 = x2; |
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m_clip_box.y2 = y2; |
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} |
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|
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//-------------------------------------------------------------------- |
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bool inbox(int x, int y) const |
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{ |
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return x >= m_clip_box.x1 && y >= m_clip_box.y1 && |
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x <= m_clip_box.x2 && y <= m_clip_box.y2; |
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} |
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//-------------------------------------------------------------------- |
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const rect_i& clip_box() const { return m_clip_box; } |
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int xmin() const { return m_clip_box.x1; } |
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int ymin() const { return m_clip_box.y1; } |
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int xmax() const { return m_clip_box.x2; } |
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int ymax() const { return m_clip_box.y2; } |
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|
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//-------------------------------------------------------------------- |
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const rect_i& bounding_clip_box() const { return m_clip_box; } |
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int bounding_xmin() const { return m_clip_box.x1; } |
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int bounding_ymin() const { return m_clip_box.y1; } |
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int bounding_xmax() const { return m_clip_box.x2; } |
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int bounding_ymax() const { return m_clip_box.y2; } |
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|
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//-------------------------------------------------------------------- |
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void clear(const color_type& c) |
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{ |
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unsigned y; |
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if(width()) |
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{ |
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for(y = 0; y < height(); y++) |
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{ |
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m_ren->copy_hline(0, y, width(), c); |
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} |
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} |
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} |
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//-------------------------------------------------------------------- |
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void fill(const color_type& c) |
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{ |
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unsigned y; |
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if(width()) |
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{ |
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for(y = 0; y < height(); y++) |
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{ |
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m_ren->blend_hline(0, y, width(), c, cover_mask); |
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} |
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} |
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} |
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//-------------------------------------------------------------------- |
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void copy_pixel(int x, int y, const color_type& c) |
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{ |
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if(inbox(x, y)) |
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{ |
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m_ren->copy_pixel(x, y, c); |
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} |
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} |
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//-------------------------------------------------------------------- |
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void blend_pixel(int x, int y, const color_type& c, cover_type cover) |
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{ |
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if(inbox(x, y)) |
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{ |
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m_ren->blend_pixel(x, y, c, cover); |
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} |
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} |
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//-------------------------------------------------------------------- |
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color_type pixel(int x, int y) const |
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{ |
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return inbox(x, y) ? |
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m_ren->pixel(x, y) : |
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color_type::no_color(); |
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} |
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//-------------------------------------------------------------------- |
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void copy_hline(int x1, int y, int x2, const color_type& c) |
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{ |
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if(x1 > x2) { int t = x2; x2 = x1; x1 = t; } |
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if(y > ymax()) return; |
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if(y < ymin()) return; |
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if(x1 > xmax()) return; |
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if(x2 < xmin()) return; |
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if(x1 < xmin()) x1 = xmin(); |
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if(x2 > xmax()) x2 = xmax(); |
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m_ren->copy_hline(x1, y, x2 - x1 + 1, c); |
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} |
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//-------------------------------------------------------------------- |
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void copy_vline(int x, int y1, int y2, const color_type& c) |
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{ |
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if(y1 > y2) { int t = y2; y2 = y1; y1 = t; } |
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if(x > xmax()) return; |
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if(x < xmin()) return; |
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if(y1 > ymax()) return; |
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if(y2 < ymin()) return; |
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if(y1 < ymin()) y1 = ymin(); |
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if(y2 > ymax()) y2 = ymax(); |
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m_ren->copy_vline(x, y1, y2 - y1 + 1, c); |
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} |
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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) { int t = x2; x2 = x1; x1 = t; } |
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if(y > ymax()) return; |
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if(y < ymin()) return; |
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if(x1 > xmax()) return; |
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if(x2 < xmin()) return; |
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if(x1 < xmin()) x1 = xmin(); |
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if(x2 > xmax()) x2 = xmax(); |
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m_ren->blend_hline(x1, y, x2 - x1 + 1, c, cover); |
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} |
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//-------------------------------------------------------------------- |
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void blend_vline(int x, int y1, int y2, |
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const color_type& c, cover_type cover) |
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{ |
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if(y1 > y2) { int t = y2; y2 = y1; y1 = t; } |
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if(x > xmax()) return; |
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if(x < xmin()) return; |
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if(y1 > ymax()) return; |
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if(y2 < ymin()) return; |
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if(y1 < ymin()) y1 = ymin(); |
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if(y2 > ymax()) y2 = ymax(); |
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m_ren->blend_vline(x, y1, y2 - y1 + 1, c, cover); |
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} |
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//-------------------------------------------------------------------- |
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void copy_bar(int x1, int y1, int x2, int y2, const color_type& c) |
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{ |
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rect_i rc(x1, y1, x2, y2); |
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rc.normalize(); |
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if(rc.clip(clip_box())) |
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{ |
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int y; |
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for(y = rc.y1; y <= rc.y2; y++) |
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{ |
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m_ren->copy_hline(rc.x1, y, unsigned(rc.x2 - rc.x1 + 1), c); |
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} |
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} |
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} |
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//-------------------------------------------------------------------- |
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void blend_bar(int x1, int y1, int x2, int y2, |
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const color_type& c, cover_type cover) |
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{ |
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rect_i rc(x1, y1, x2, y2); |
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rc.normalize(); |
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if(rc.clip(clip_box())) |
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{ |
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int y; |
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for(y = rc.y1; y <= rc.y2; y++) |
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{ |
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m_ren->blend_hline(rc.x1, |
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y, |
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unsigned(rc.x2 - rc.x1 + 1), |
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c, |
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cover); |
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} |
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} |
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} |
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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()) return; |
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if(y < ymin()) return; |
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if(x < xmin()) |
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{ |
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len -= xmin() - x; |
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if(len <= 0) return; |
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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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{ |
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len = xmax() - x + 1; |
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if(len <= 0) return; |
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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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//-------------------------------------------------------------------- |
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void blend_solid_vspan(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(x > xmax()) return; |
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if(x < xmin()) return; |
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if(y < ymin()) |
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{ |
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len -= ymin() - y; |
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if(len <= 0) return; |
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covers += ymin() - y; |
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y = ymin(); |
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} |
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if(y + len > ymax()) |
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{ |
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len = ymax() - y + 1; |
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if(len <= 0) return; |
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} |
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m_ren->blend_solid_vspan(x, y, len, c, covers); |
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} |
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//-------------------------------------------------------------------- |
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void copy_color_hspan(int x, int y, int len, const color_type* colors) |
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{ |
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if(y > ymax()) return; |
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if(y < ymin()) return; |
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if(x < xmin()) |
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{ |
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int d = xmin() - x; |
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len -= d; |
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if(len <= 0) return; |
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colors += d; |
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x = xmin(); |
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} |
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if(x + len > xmax()) |
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{ |
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len = xmax() - x + 1; |
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if(len <= 0) return; |
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} |
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m_ren->copy_color_hspan(x, y, len, colors); |
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} |
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//-------------------------------------------------------------------- |
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void copy_color_vspan(int x, int y, int len, const color_type* colors) |
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{ |
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if(x > xmax()) return; |
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if(x < xmin()) return; |
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if(y < ymin()) |
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{ |
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int d = ymin() - y; |
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len -= d; |
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if(len <= 0) return; |
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colors += d; |
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y = ymin(); |
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} |
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if(y + len > ymax()) |
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{ |
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len = ymax() - y + 1; |
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if(len <= 0) return; |
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} |
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m_ren->copy_color_vspan(x, y, len, colors); |
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} |
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//-------------------------------------------------------------------- |
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void blend_color_hspan(int x, int y, int len, |
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const color_type* colors, |
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const cover_type* covers, |
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cover_type cover = agg::cover_full) |
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{ |
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if(y > ymax()) return; |
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if(y < ymin()) return; |
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if(x < xmin()) |
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{ |
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int d = xmin() - x; |
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len -= d; |
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if(len <= 0) return; |
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if(covers) covers += d; |
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colors += d; |
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x = xmin(); |
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} |
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if(x + len > xmax()) |
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{ |
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len = xmax() - x + 1; |
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if(len <= 0) return; |
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} |
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m_ren->blend_color_hspan(x, y, len, colors, covers, cover); |
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} |
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//-------------------------------------------------------------------- |
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void blend_color_vspan(int x, int y, int len, |
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const color_type* colors, |
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const cover_type* covers, |
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cover_type cover = agg::cover_full) |
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{ |
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if(x > xmax()) return; |
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if(x < xmin()) return; |
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if(y < ymin()) |
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{ |
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int d = ymin() - y; |
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len -= d; |
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if(len <= 0) return; |
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if(covers) covers += d; |
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colors += d; |
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y = ymin(); |
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} |
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if(y + len > ymax()) |
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{ |
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len = ymax() - y + 1; |
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if(len <= 0) return; |
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} |
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m_ren->blend_color_vspan(x, y, len, colors, covers, cover); |
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} |
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//-------------------------------------------------------------------- |
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rect_i clip_rect_area(rect_i& dst, rect_i& src, int wsrc, int hsrc) const |
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{ |
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rect_i rc(0,0,0,0); |
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rect_i cb = clip_box(); |
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++cb.x2; |
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++cb.y2; |
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if(src.x1 < 0) |
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{ |
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dst.x1 -= src.x1; |
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src.x1 = 0; |
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} |
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if(src.y1 < 0) |
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{ |
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dst.y1 -= src.y1; |
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src.y1 = 0; |
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} |
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if(src.x2 > wsrc) src.x2 = wsrc; |
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if(src.y2 > hsrc) src.y2 = hsrc; |
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if(dst.x1 < cb.x1) |
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{ |
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src.x1 += cb.x1 - dst.x1; |
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dst.x1 = cb.x1; |
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} |
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if(dst.y1 < cb.y1) |
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{ |
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src.y1 += cb.y1 - dst.y1; |
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dst.y1 = cb.y1; |
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} |
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if(dst.x2 > cb.x2) dst.x2 = cb.x2; |
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if(dst.y2 > cb.y2) dst.y2 = cb.y2; |
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rc.x2 = dst.x2 - dst.x1; |
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rc.y2 = dst.y2 - dst.y1; |
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if(rc.x2 > src.x2 - src.x1) rc.x2 = src.x2 - src.x1; |
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if(rc.y2 > src.y2 - src.y1) rc.y2 = src.y2 - src.y1; |
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return rc; |
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} |
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//-------------------------------------------------------------------- |
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template<class RenBuf> |
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void copy_from(const RenBuf& src, |
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const rect_i* rect_src_ptr = 0, |
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int dx = 0, |
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int dy = 0) |
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{ |
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rect_i rsrc(0, 0, src.width(), src.height()); |
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if(rect_src_ptr) |
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{ |
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rsrc.x1 = rect_src_ptr->x1; |
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rsrc.y1 = rect_src_ptr->y1; |
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rsrc.x2 = rect_src_ptr->x2 + 1; |
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rsrc.y2 = rect_src_ptr->y2 + 1; |
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} |
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|
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// Version with xdst, ydst (absolute positioning) |
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//rect_i rdst(xdst, ydst, xdst + rsrc.x2 - rsrc.x1, ydst + rsrc.y2 - rsrc.y1); |
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|
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// Version with dx, dy (relative positioning) |
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rect_i rdst(rsrc.x1 + dx, rsrc.y1 + dy, rsrc.x2 + dx, rsrc.y2 + dy); |
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|
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rect_i rc = clip_rect_area(rdst, rsrc, src.width(), src.height()); |
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|
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if(rc.x2 > 0) |
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{ |
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int incy = 1; |
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if(rdst.y1 > rsrc.y1) |
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{ |
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rsrc.y1 += rc.y2 - 1; |
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rdst.y1 += rc.y2 - 1; |
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incy = -1; |
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} |
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while(rc.y2 > 0) |
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{ |
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m_ren->copy_from(src, |
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rdst.x1, rdst.y1, |
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rsrc.x1, rsrc.y1, |
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rc.x2); |
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rdst.y1 += incy; |
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rsrc.y1 += incy; |
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--rc.y2; |
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} |
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} |
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} |
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|
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//-------------------------------------------------------------------- |
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template<class SrcPixelFormatRenderer> |
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void blend_from(const SrcPixelFormatRenderer& src, |
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const rect_i* rect_src_ptr = 0, |
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int dx = 0, |
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int dy = 0, |
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cover_type cover = agg::cover_full) |
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{ |
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rect_i rsrc(0, 0, src.width(), src.height()); |
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if(rect_src_ptr) |
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{ |
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rsrc.x1 = rect_src_ptr->x1; |
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rsrc.y1 = rect_src_ptr->y1; |
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rsrc.x2 = rect_src_ptr->x2 + 1; |
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rsrc.y2 = rect_src_ptr->y2 + 1; |
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} |
|
|
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// Version with xdst, ydst (absolute positioning) |
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//rect_i rdst(xdst, ydst, xdst + rsrc.x2 - rsrc.x1, ydst + rsrc.y2 - rsrc.y1); |
|
|
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// Version with dx, dy (relative positioning) |
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rect_i rdst(rsrc.x1 + dx, rsrc.y1 + dy, rsrc.x2 + dx, rsrc.y2 + dy); |
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rect_i rc = clip_rect_area(rdst, rsrc, src.width(), src.height()); |
|
|
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if(rc.x2 > 0) |
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{ |
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int incy = 1; |
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if(rdst.y1 > rsrc.y1) |
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{ |
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rsrc.y1 += rc.y2 - 1; |
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rdst.y1 += rc.y2 - 1; |
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incy = -1; |
|
} |
|
while(rc.y2 > 0) |
|
{ |
|
typename SrcPixelFormatRenderer::row_data rw = src.row(rsrc.y1); |
|
if(rw.ptr) |
|
{ |
|
int x1src = rsrc.x1; |
|
int x1dst = rdst.x1; |
|
int len = rc.x2; |
|
if(rw.x1 > x1src) |
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{ |
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x1dst += rw.x1 - x1src; |
|
len -= rw.x1 - x1src; |
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x1src = rw.x1; |
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} |
|
if(len > 0) |
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{ |
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if(x1src + len-1 > rw.x2) |
|
{ |
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len -= x1src + len - rw.x2 - 1; |
|
} |
|
if(len > 0) |
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{ |
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m_ren->blend_from(src, |
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x1dst, rdst.y1, |
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x1src, rsrc.y1, |
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len, |
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cover); |
|
} |
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} |
|
} |
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rdst.y1 += incy; |
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rsrc.y1 += incy; |
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--rc.y2; |
|
} |
|
} |
|
} |
|
|
|
//-------------------------------------------------------------------- |
|
template<class SrcPixelFormatRenderer> |
|
void blend_from_color(const SrcPixelFormatRenderer& src, |
|
const color_type& color, |
|
const rect_i* rect_src_ptr = 0, |
|
int dx = 0, |
|
int dy = 0, |
|
cover_type cover = agg::cover_full) |
|
{ |
|
rect_i rsrc(0, 0, src.width(), src.height()); |
|
if(rect_src_ptr) |
|
{ |
|
rsrc.x1 = rect_src_ptr->x1; |
|
rsrc.y1 = rect_src_ptr->y1; |
|
rsrc.x2 = rect_src_ptr->x2 + 1; |
|
rsrc.y2 = rect_src_ptr->y2 + 1; |
|
} |
|
|
|
// Version with xdst, ydst (absolute positioning) |
|
//rect_i rdst(xdst, ydst, xdst + rsrc.x2 - rsrc.x1, ydst + rsrc.y2 - rsrc.y1); |
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|
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// Version with dx, dy (relative positioning) |
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rect_i rdst(rsrc.x1 + dx, rsrc.y1 + dy, rsrc.x2 + dx, rsrc.y2 + dy); |
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rect_i rc = clip_rect_area(rdst, rsrc, src.width(), src.height()); |
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|
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if(rc.x2 > 0) |
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{ |
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int incy = 1; |
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if(rdst.y1 > rsrc.y1) |
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{ |
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rsrc.y1 += rc.y2 - 1; |
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rdst.y1 += rc.y2 - 1; |
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incy = -1; |
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} |
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while(rc.y2 > 0) |
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{ |
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typename SrcPixelFormatRenderer::row_data rw = src.row(rsrc.y1); |
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if(rw.ptr) |
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{ |
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int x1src = rsrc.x1; |
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int x1dst = rdst.x1; |
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int len = rc.x2; |
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if(rw.x1 > x1src) |
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{ |
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x1dst += rw.x1 - x1src; |
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len -= rw.x1 - x1src; |
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x1src = rw.x1; |
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} |
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if(len > 0) |
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{ |
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if(x1src + len-1 > rw.x2) |
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{ |
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len -= x1src + len - rw.x2 - 1; |
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} |
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if(len > 0) |
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{ |
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m_ren->blend_from_color(src, |
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color, |
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x1dst, rdst.y1, |
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x1src, rsrc.y1, |
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len, |
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cover); |
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} |
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} |
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} |
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rdst.y1 += incy; |
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rsrc.y1 += incy; |
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--rc.y2; |
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} |
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} |
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} |
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|
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//-------------------------------------------------------------------- |
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template<class SrcPixelFormatRenderer> |
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void blend_from_lut(const SrcPixelFormatRenderer& src, |
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const color_type* color_lut, |
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const rect_i* rect_src_ptr = 0, |
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int dx = 0, |
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int dy = 0, |
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cover_type cover = agg::cover_full) |
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{ |
|
rect_i rsrc(0, 0, src.width(), src.height()); |
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if(rect_src_ptr) |
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{ |
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rsrc.x1 = rect_src_ptr->x1; |
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rsrc.y1 = rect_src_ptr->y1; |
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rsrc.x2 = rect_src_ptr->x2 + 1; |
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rsrc.y2 = rect_src_ptr->y2 + 1; |
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} |
|
|
|
// Version with xdst, ydst (absolute positioning) |
|
//rect_i rdst(xdst, ydst, xdst + rsrc.x2 - rsrc.x1, ydst + rsrc.y2 - rsrc.y1); |
|
|
|
// Version with dx, dy (relative positioning) |
|
rect_i rdst(rsrc.x1 + dx, rsrc.y1 + dy, rsrc.x2 + dx, rsrc.y2 + dy); |
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rect_i rc = clip_rect_area(rdst, rsrc, src.width(), src.height()); |
|
|
|
if(rc.x2 > 0) |
|
{ |
|
int incy = 1; |
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if(rdst.y1 > rsrc.y1) |
|
{ |
|
rsrc.y1 += rc.y2 - 1; |
|
rdst.y1 += rc.y2 - 1; |
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incy = -1; |
|
} |
|
while(rc.y2 > 0) |
|
{ |
|
typename SrcPixelFormatRenderer::row_data rw = src.row(rsrc.y1); |
|
if(rw.ptr) |
|
{ |
|
int x1src = rsrc.x1; |
|
int x1dst = rdst.x1; |
|
int len = rc.x2; |
|
if(rw.x1 > x1src) |
|
{ |
|
x1dst += rw.x1 - x1src; |
|
len -= rw.x1 - x1src; |
|
x1src = rw.x1; |
|
} |
|
if(len > 0) |
|
{ |
|
if(x1src + len-1 > rw.x2) |
|
{ |
|
len -= x1src + len - rw.x2 - 1; |
|
} |
|
if(len > 0) |
|
{ |
|
m_ren->blend_from_lut(src, |
|
color_lut, |
|
x1dst, rdst.y1, |
|
x1src, rsrc.y1, |
|
len, |
|
cover); |
|
} |
|
} |
|
} |
|
rdst.y1 += incy; |
|
rsrc.y1 += incy; |
|
--rc.y2; |
|
} |
|
} |
|
} |
|
|
|
private: |
|
pixfmt_type* m_ren; |
|
rect_i m_clip_box; |
|
}; |
|
|
|
|
|
} |
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|
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#endif
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