* Copyright 2005-2006, Stephan Aßmus <superstippi@gmx.de>.
* Copyright 2008, Andrej Spielmann <andrej.spielmann@seh.ox.ac.uk>.
* Copyright 2015, Julian Harnath <julian.harnath@rwth-aachen.de>
* All rights reserved. Distributed under the terms of the MIT License.
*
* Copyright 2002-2004 Maxim Shemanarev (http://www.antigrain.com)
*
*
* class renderer_region, slightly modified renderer_mclip which directly
* uses a BRegion for clipping info.
*
*/
#ifndef AGG_RENDERER_REGION_INCLUDED
#define AGG_RENDERER_REGION_INCLUDED
#include <Region.h>
#include "agg_basics.h"
#include "agg_array.h"
#include "agg_renderer_base.h"
namespace agg
{
template<class PixelFormat> class renderer_region
{
public:
typedef PixelFormat pixfmt_type;
typedef typename pixfmt_type::color_type color_type;
typedef renderer_base<pixfmt_type> base_ren_type;
renderer_region(pixfmt_type& ren) :
m_ren(ren),
m_region(NULL),
m_curr_cb(0),
m_bounds(m_ren.xmin(), m_ren.ymin(), m_ren.xmax(), m_ren.ymax()),
m_offset_x(0),
m_offset_y(0)
{
}
const pixfmt_type& ren() const { return m_ren.ren(); }
pixfmt_type& ren() { return m_ren.ren(); }
unsigned width() const { return m_ren.width(); }
unsigned height() const { return m_ren.height(); }
const rect_i& clip_box() const { return m_bounds; }
int xmin() const { return translate_from_base_ren_x(
m_ren.xmin()); }
int ymin() const { return translate_from_base_ren_y(
m_ren.ymin()); }
int xmax() const { return translate_from_base_ren_x(
m_ren.xmax()); }
int ymax() const { return translate_from_base_ren_y(
m_ren.ymax()); }
const rect_i& bounding_clip_box() const { return m_bounds; }
int bounding_xmin() const { return m_bounds.x1; }
int bounding_ymin() const { return m_bounds.y1; }
int bounding_xmax() const { return m_bounds.x2; }
int bounding_ymax() const { return m_bounds.y2; }
void first_clip_box()
{
m_curr_cb = 0;
if(m_region && m_region->CountRects() > 0)
{
clipping_rect cb = m_region->RectAtInt(0);
translate_to_base_ren(cb);
m_ren.clip_box_naked(
cb.left,
cb.top,
cb.right,
cb.bottom);
}
else
m_ren.clip_box_naked(0, 0, -1, -1);
}
bool next_clip_box()
{
if(m_region && (int)(++m_curr_cb) < m_region->CountRects())
{
clipping_rect cb = m_region->RectAtInt(m_curr_cb);
translate_to_base_ren(cb);
m_ren.clip_box_naked(
cb.left,
cb.top,
cb.right,
cb.bottom);
return true;
}
return false;
}
void reset_clipping(bool visibility)
{
m_ren.reset_clipping(visibility);
m_region = NULL;
m_curr_cb = 0;
m_bounds = m_ren.clip_box();
translate_from_base_ren(m_bounds);
}
void set_clipping_region(BRegion* region)
{
m_region = region;
if (m_region) {
clipping_rect r = m_region->FrameInt();
if (r.left <= r.right && r.top <= r.bottom) {
r.left = max_c(0, r.left);
r.top = max_c(0, r.top);
r.right = min_c((int)width() - 1, r.right);
r.bottom = min_c((int)height() - 1, r.bottom);
if(r.left < m_bounds.x1) m_bounds.x1 = r.left;
if(r.top < m_bounds.y1) m_bounds.y1 = r.top;
if(r.right > m_bounds.x2) m_bounds.x2 = r.right;
if(r.bottom > m_bounds.y2) m_bounds.y2 = r.bottom;
}
}
}
void set_offset(int offset_x, int offset_y)
{
m_offset_x = offset_x;
m_offset_y = offset_y;
if (m_region == NULL) {
m_bounds = m_ren.clip_box();
translate_from_base_ren(m_bounds);
}
}
void translate_to_base_ren_x(int& x)
{
x -= m_offset_x;
}
void translate_to_base_ren_y(int& y)
{
y -= m_offset_y;
}
void translate_to_base_ren(int& x, int&y)
{
x -= m_offset_x;
y -= m_offset_y;
}
void translate_to_base_ren(clipping_rect& clip)
{
clip.left -= m_offset_x;
clip.right -= m_offset_x;
clip.top -= m_offset_y;
clip.bottom -= m_offset_y;
}
int translate_from_base_ren_x(int x) const
{
return x + m_offset_x;
}
int translate_from_base_ren_y(int y) const
{
return y + m_offset_y;
}
void translate_from_base_ren(int& x, int& y)
{
x += m_offset_x;
y += m_offset_y;
}
void translate_from_base_ren(rect_i& rect)
{
rect.x1 += m_offset_x;
rect.x2 += m_offset_x;
rect.y1 += m_offset_y;
rect.y2 += m_offset_y;
}
void clear(const color_type& c)
{
m_ren.clear(c);
}
void copy_pixel(int x, int y, const color_type& c)
{
translate_to_base_ren(x, y);
first_clip_box();
do
{
if(m_ren.inbox(x, y))
{
m_ren.ren().copy_pixel(x, y, c);
break;
}
}
while(next_clip_box());
}
void blend_pixel(int x, int y, const color_type& c, cover_type cover)
{
translate_to_base_ren(x, y);
first_clip_box();
do
{
if(m_ren.inbox(x, y))
{
m_ren.ren().blend_pixel(x, y, c, cover);
break;
}
}
while(next_clip_box());
}
color_type pixel(int x, int y) const
{
translate_to_base_ren(x, y);
first_clip_box();
do
{
if(m_ren.inbox(x, y))
{
return m_ren.ren().pixel(x, y);
}
}
while(next_clip_box());
return color_type::no_color();
}
void copy_hline(int x1, int y, int x2, const color_type& c)
{
translate_to_base_ren(x1, y);
translate_to_base_ren_x(x2);
first_clip_box();
do
{
m_ren.copy_hline(x1, y, x2, c);
}
while(next_clip_box());
}
void copy_vline(int x, int y1, int y2, const color_type& c)
{
translate_to_base_ren(x, y1);
translate_to_base_ren_y(y2);
first_clip_box();
do
{
m_ren.copy_vline(x, y1, y2, c);
}
while(next_clip_box());
}
void blend_hline(int x1, int y, int x2,
const color_type& c, cover_type cover)
{
translate_to_base_ren(x1, y);
translate_to_base_ren_x(x2);
first_clip_box();
do
{
m_ren.blend_hline(x1, y, x2, c, cover);
}
while(next_clip_box());
}
void blend_vline(int x, int y1, int y2,
const color_type& c, cover_type cover)
{
translate_to_base_ren(x, y1);
translate_to_base_ren_y(y2);
first_clip_box();
do
{
m_ren.blend_vline(x, y1, y2, c, cover);
}
while(next_clip_box());
}
void copy_bar(int x1, int y1, int x2, int y2, const color_type& c)
{
translate_to_base_ren(x1, y1);
translate_to_base_ren(x2, y2);
first_clip_box();
do
{
m_ren.copy_bar(x1, y1, x2, y2, c);
}
while(next_clip_box());
}
void blend_bar(int x1, int y1, int x2, int y2,
const color_type& c, cover_type cover)
{
translate_to_base_ren(x1, y1);
translate_to_base_ren(x2, y2);
first_clip_box();
do
{
m_ren.blend_bar(x1, y1, x2, y2, c, cover);
}
while(next_clip_box());
}
void blend_solid_hspan(int x, int y, int len,
const color_type& c, const cover_type* covers)
{
translate_to_base_ren(x, y);
first_clip_box();
do
{
m_ren.blend_solid_hspan(x, y, len, c, covers);
}
while(next_clip_box());
}
void blend_solid_hspan_subpix(int x, int y, int len,
const color_type& c, const cover_type* covers)
{
translate_to_base_ren(x, y);
first_clip_box();
do
{
m_ren.blend_solid_hspan_subpix(x, y, len, c, covers);
}
while(next_clip_box());
}
void blend_solid_vspan(int x, int y, int len,
const color_type& c, const cover_type* covers)
{
translate_to_base_ren(x, y);
first_clip_box();
do
{
m_ren.blend_solid_vspan(x, y, len, c, covers);
}
while(next_clip_box());
}
void blend_color_hspan(int x, int y, int len,
const color_type* colors,
const cover_type* covers,
cover_type cover = cover_full)
{
translate_to_base_ren(x, y);
first_clip_box();
do
{
m_ren.blend_color_hspan(x, y, len, colors, covers, cover);
}
while(next_clip_box());
}
void blend_color_vspan(int x, int y, int len,
const color_type* colors,
const cover_type* covers,
cover_type cover = cover_full)
{
translate_to_base_ren(x, y);
first_clip_box();
do
{
m_ren.blend_color_hspan(x, y, len, colors, covers, cover);
}
while(next_clip_box());
}
void blend_color_hspan_no_clip(int x, int y, int len,
const color_type* colors,
const cover_type* covers,
cover_type cover = cover_full)
{
translate_to_base_ren(x, y);
m_ren.blend_color_hspan_no_clip(x, y, len, colors, covers, cover);
}
void blend_color_vspan_no_clip(int x, int y, int len,
const color_type* colors,
const cover_type* covers,
cover_type cover = cover_full)
{
translate_to_base_ren(x, y);
m_ren.blend_color_vspan_no_clip(x, y, len, colors, covers, cover);
}
void copy_from(const rendering_buffer& from,
const rect_i* rc=0,
int x_to=0,
int y_to=0)
{
translate_to_base_ren(x_to, y_to);
first_clip_box();
do
{
m_ren.copy_from(from, rc, x_to, y_to);
}
while(next_clip_box());
}
private:
renderer_region(const renderer_region<PixelFormat>&);
const renderer_region<PixelFormat>&
operator = (const renderer_region<PixelFormat>&);
base_ren_type m_ren;
BRegion* m_region;
unsigned m_curr_cb;
rect_i m_bounds;
int m_offset_x;
int m_offset_y;
};
}
#endif
