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