an agg renderer that uses a (reference to a) BRegion for storing clipping information, this avoids transforming the clipping from Painter to the agg world
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@12399 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Stephan Aßmus
parent
8770be761d
commit
519c55739f
341
src/servers/app/drawing/Painter/agg_renderer_region.h
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341
src/servers/app/drawing/Painter/agg_renderer_region.h
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//----------------------------------------------------------------------------
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// Anti-Grain Geometry - Version 2.2
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// Copyright (C) 2002-2004 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_region
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//
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//----------------------------------------------------------------------------
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#ifndef AGG_RENDERER_REGION_INCLUDED
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#define AGG_RENDERER_REGION_INCLUDED
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#include <Region.h>
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#include "agg_basics.h"
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#include "agg_array.h"
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#include "agg_renderer_base.h"
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namespace agg
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{
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//----------------------------------------------------------renderer_region
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template<class PixelFormat> class renderer_region
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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 renderer_base<pixfmt_type> base_ren_type;
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//--------------------------------------------------------------------
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renderer_region(pixfmt_type& ren) :
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m_ren(ren),
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m_region(NULL),
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m_curr_cb(0),
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m_bounds(m_ren.xmin(), m_ren.ymin(), m_ren.xmax(), m_ren.ymax())
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{
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}
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//--------------------------------------------------------------------
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const pixfmt_type& ren() const { return m_ren.ren(); }
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pixfmt_type& ren() { return m_ren.ren(); }
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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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const rect& clip_box() const { return m_ren.clip_box(); }
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int xmin() const { return m_ren.xmin(); }
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int ymin() const { return m_ren.ymin(); }
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int xmax() const { return m_ren.xmax(); }
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int ymax() const { return m_ren.ymax(); }
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//--------------------------------------------------------------------
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const rect& bounding_clip_box() const { return m_bounds; }
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int bounding_xmin() const { return m_bounds.x1; }
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int bounding_ymin() const { return m_bounds.y1; }
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int bounding_xmax() const { return m_bounds.x2; }
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int bounding_ymax() const { return m_bounds.y2; }
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//--------------------------------------------------------------------
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void first_clip_box()
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{
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m_curr_cb = 0;
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if(m_region && m_region->CountRects() > 0)
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{
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BRect cb = m_region->RectAt(0);
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m_ren.clip_box_naked(cb.left, cb.top, cb.right, cb.bottom);
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}
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}
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//--------------------------------------------------------------------
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bool next_clip_box()
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{
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if(m_region && (int)(++m_curr_cb) < m_region->CountRects())
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{
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BRect cb = m_region->RectAt(m_curr_cb);
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m_ren.clip_box_naked(cb.left, cb.top, cb.right, cb.bottom);
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return true;
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}
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return false;
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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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m_ren.reset_clipping(visibility);
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m_region = NULL;
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m_curr_cb = 0;
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m_bounds = m_ren.clip_box();
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}
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//--------------------------------------------------------------------
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void set_clipping_region(BRegion* region)
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{
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m_region = region;
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if (m_region) {
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BRect r = m_region->Frame();
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if (r.IsValid()) {
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r = r & BRect(0, 0, width() - 1, height() - 1);
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// a BRegion actually keeps integer clipping_rects
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// so just converting to int without rounding is
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// fine
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if(r.left < m_bounds.x1) m_bounds.x1 = (int)r.left;
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if(r.top < m_bounds.y1) m_bounds.y1 = (int)r.top;
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if(r.right > m_bounds.x2) m_bounds.x2 = (int)r.right;
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if(r.bottom > m_bounds.y2) m_bounds.y2 = (int)r.bottom;
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}
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}
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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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m_ren.clear(c);
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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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first_clip_box();
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do
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{
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if(m_ren.inbox(x, y))
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{
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m_ren.ren().copy_pixel(x, y, c);
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break;
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}
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}
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while(next_clip_box());
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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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first_clip_box();
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do
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{
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if(m_ren.inbox(x, y))
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{
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m_ren.ren().blend_pixel(x, y, c, cover);
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break;
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}
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}
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while(next_clip_box());
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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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first_clip_box();
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do
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{
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if(m_ren.inbox(x, y))
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{
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return m_ren.ren().pixel(x, y);
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}
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}
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while(next_clip_box());
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return 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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first_clip_box();
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do
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{
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m_ren.copy_hline(x1, y, x2, c);
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}
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while(next_clip_box());
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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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first_clip_box();
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do
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{
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m_ren.copy_vline(x, y1, y2, c);
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}
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while(next_clip_box());
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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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first_clip_box();
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do
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{
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m_ren.blend_hline(x1, y, x2, c, cover);
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}
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while(next_clip_box());
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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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first_clip_box();
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do
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{
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m_ren.blend_vline(x, y1, y2, c, cover);
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}
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while(next_clip_box());
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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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first_clip_box();
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do
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{
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m_ren.copy_bar(x1, y1, x2, y2, c);
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}
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while(next_clip_box());
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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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first_clip_box();
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do
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{
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m_ren.blend_bar(x1, y1, x2, y2, c, cover);
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}
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while(next_clip_box());
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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, const cover_type* covers)
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{
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first_clip_box();
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do
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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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while(next_clip_box());
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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, const cover_type* covers)
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{
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first_clip_box();
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do
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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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while(next_clip_box());
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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 = cover_full)
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{
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first_clip_box();
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do
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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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while(next_clip_box());
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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 = cover_full)
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{
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first_clip_box();
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do
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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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while(next_clip_box());
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}
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//--------------------------------------------------------------------
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void blend_color_hspan_no_clip(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 = cover_full)
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{
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m_ren.blend_color_hspan_no_clip(x, y, len, colors, covers, cover);
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}
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//--------------------------------------------------------------------
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void blend_color_vspan_no_clip(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 = cover_full)
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{
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m_ren.blend_color_vspan_no_clip(x, y, len, colors, covers, cover);
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}
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//--------------------------------------------------------------------
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void copy_from(const rendering_buffer& from,
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const rect* rc=0,
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int x_to=0,
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int y_to=0)
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{
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first_clip_box();
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do
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{
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m_ren.copy_from(from, rc, x_to, y_to);
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}
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while(next_clip_box());
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}
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private:
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renderer_region(const renderer_region<PixelFormat>&);
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const renderer_region<PixelFormat>&
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operator = (const renderer_region<PixelFormat>&);
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base_ren_type m_ren;
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BRegion* m_region;
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unsigned m_curr_cb;
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rect m_bounds;
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};
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}
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#endif
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