+++ /dev/null
-/*! ========================================================================
-** Extended Template Library
-** Pen Template Class Implementation
-** $Id$
-**
-** Copyright (c) 2002 Robert B. Quattlebaum Jr.
-**
-** This package is free software; you can redistribute it and/or
-** modify it under the terms of the GNU General Public License as
-** published by the Free Software Foundation; either version 2 of
-** the License, or (at your option) any later version.
-**
-** This package is distributed in the hope that it will be useful,
-** but WITHOUT ANY WARRANTY; without even the implied warranty of
-** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-** General Public License for more details.
-**
-** === N O T E S ===========================================================
-**
-** This is an internal header file, included by other ETL headers.
-** You should not attempt to use it directly.
-**
-** ========================================================================= */
-
-/* === S T A R T =========================================================== */
-
-#ifndef __ETL_PEN_H
-#define __ETL_PEN_H
-
-/* === H E A D E R S ======================================================= */
-
-#include "_curve_func.h"
-#include <cassert>
-#include <iterator>
-#include <algorithm>
-
-/* === M A C R O S ========================================================= */
-
-/* === T Y P E D E F S ===================================================== */
-
-/* === C L A S S E S & S T R U C T S ======================================= */
-
-_ETL_BEGIN_NAMESPACE
-
-template<typename T>
-class generic_pen_row_iterator
-{
-public:
- struct iterator_category : public std::random_access_iterator_tag {};
- typedef T value_type;
- typedef int difference_type;
- typedef value_type* pointer;
- typedef value_type& reference;
-
- typedef generic_pen_row_iterator<value_type> self_type;
-
- pointer data_;
- int pitch_;
-
- reference operator[](int i)const { assert(data_); return *(pointer)( (char*)data_+pitch_*i ); }
- reference operator*()const { assert(data_); return *data_; }
- pointer operator->() const { assert(data_); return &(operator*()); }
-
- void inc() { assert(data_); data_ = (pointer)((char*)data_ + pitch_); }
- void inc(int n) { assert(data_); data_ = (pointer)((char*)data_ + n*pitch_); }
-
- void dec() { assert(data_); data_ = (pointer)((char*)data_ - pitch_); }
- void dec(int n) { assert(data_); data_ = (pointer)((char*)data_ - n*pitch_); }
-
- const self_type &operator++() { assert(data_); inc(); return *this; }
- const self_type &operator--() { assert(data_); dec(); return *this; }
-
- self_type operator++(int)
- { assert(data_); self_type ret(*this); inc(); return ret; }
- self_type operator--(int)
- { assert(data_); self_type ret(*this); dec(); return ret; }
-
- bool operator==(const self_type &rhs)const
- { return data_==rhs.data_; }
-
- bool operator!=(const self_type &rhs)const
- { return data_!=rhs.data_; }
-
- difference_type operator-(const self_type &rhs)const
- { assert(data_); return ((char*)data_-(char*)rhs.data_-1)/pitch_+1; }
-
- self_type operator+(const difference_type &rhs)const
- {
- assert(data_);
- self_type ret(*this);
- ret.inc(rhs);
- return ret;
- }
-
- self_type operator-(const difference_type &rhs)const
- {
- assert(data_);
- self_type ret(*this);
- ret.dec(rhs);
- return ret;
- }
-
- operator const generic_pen_row_iterator<const value_type>()const
- {
- return generic_pen_row_iterator<const value_type>(data_,pitch_);
- }
-
- operator bool()const { return (bool)data_; }
- bool operator!()const { return !data_; }
-
- generic_pen_row_iterator(pointer data, int pitch):data_(data),pitch_(pitch) { }
- generic_pen_row_iterator():data_(NULL) { }
-};
-
-template<typename T, typename AT=T>
-class generic_pen
-{
-public:
- typedef T value_type;
- typedef AT accumulator_type;
- typedef value_type* pointer;
- typedef const value_type* const_pointer;
- typedef value_type& reference;
- typedef const value_type& const_reference;
-
- typedef pointer iterator_x;
- typedef const_pointer const_iterator_x;
-
- typedef generic_pen_row_iterator<value_type> iterator_y;
- typedef generic_pen_row_iterator<const value_type> const_iterator_y;
-
- struct difference_type
- {
- typedef int value_type;
- value_type x,y;
- difference_type(value_type x, value_type y):x(x),y(y) { }
- value_type &operator[](int i)const { return i?y:x; }
- };
-
-protected:
- int x_,y_;
- int w_,h_;
-private:
- int pitch_;
- value_type value_;
- value_type *data_;
-
- typedef generic_pen<T,AT> self_type;
-
- void addptr(int nbytes)
- {
- data_ = (pointer)((char*)data_ + nbytes);
- }
-
- void subptr(int nbytes)
- {
- data_ = (pointer)((char*)data_ - nbytes);
- }
-
-public:
-
- generic_pen(value_type *data, int w, int h, int pitch):
- x_(0),
- y_(0),
- w_(w),
- h_(h),
- pitch_(pitch),
- data_(data)
- {
- }
-
- generic_pen(value_type *data, int w, int h):
- x_(0),
- y_(0),
- w_(w),
- h_(h),
- pitch_(sizeof(value_type)*w),
- data_(data)
- {
- }
-
- generic_pen():data_(NULL) { }
-
- self_type& move(int a, int b)
- {
- assert(data_);
- x_ += a, y_ += b;
- addptr(b*pitch_ + a*sizeof(value_type));
- return *this;
- }
- self_type& move_to(int x, int y) { assert(data_); return move(x - x_,y - y_);}
- void set_value(const value_type &v) { value_=v; }
-
- void inc_x() { assert(data_); x_++; data_++; }
- void dec_x() { assert(data_); x_--; data_--; }
- void inc_y() { assert(data_); y_++; addptr(pitch_); }
- void dec_y() { assert(data_); y_--; subptr(pitch_); }
-
- void inc_x(int n) { assert(data_); x_+=n; data_+=n; }
- void dec_x(int n) { assert(data_); x_-=n; data_-=n; }
- void inc_y(int n) { assert(data_); y_+=n; data_ = (pointer)((char*)data_ + pitch_*n); }
- void dec_y(int n) { assert(data_); y_-=n; data_ = (pointer)((char*)data_ - pitch_*n); }
-
- void put_value(const value_type &v)const { assert(data_); *data_=v; }
- void put_value()const { assert(data_); put_value(value_); }
-
- void put_value_clip(const value_type &v)const
- { if(!clipped()) put_value(v); }
- void put_value_clip()const { put_value_clip(value_); }
-
- const_reference get_value()const { assert(data_); return *data_; }
-
- const_reference get_value_at(int x, int y)const { assert(data_); return ((pointer)(((char*)data_)+y*pitch_))[x]; }
-
- const_reference get_value_clip_at(int x, int y)const { assert(data_); if(clipped(x,y))return value_type(); return ((pointer)(((char*)data_)+y*pitch_))[x]; }
-
- value_type get_value_clip()const { assert(data_); if(clipped())return value_type(); return *data_; }
-
- value_type get_pen_value()const { return value_; }
-
- void put_hline(int l,const value_type &v)
- {for(;l>0;l--,inc_x())put_value(v);}
-
- void put_hline(int l) {put_hline(l,value_);}
-
- void put_hline_clip(int l, const value_type &v)
- {l=std::min(l,w_-x_);for(;l>0;l--,inc_x())put_value_clip(v);}
-
- void put_hline_clip(int l) {put_hline_clip(l,value_);}
-
- //the put_block functions do not modify the pen
- void put_block(int h, int w, const value_type &v)
- {
- self_type row(*this);
- for(;h>0;h--,row.inc_y())
- {
- self_type col(row);
- col.put_hline(w,v);
- }
- }
-
- void put_block(int h, int w) { put_block(h,w,value_); }
-
- void put_block_clip(int h, int w, const value_type &v)
- {
- self_type row(*this);
-
- //clip start position
- if(row.x_ < 0) { w+=row.x_; row.inc_x(-row.x_); }
- if(row.y_ < 0) { h+=row.y_; row.inc_y(-row.y_); }
-
- //clip width and height of copy rect
- h = std::min(h,h_-y_);
- w = std::min(w,w_-x_);
-
- //copy rect
- for(;h>0;h--,row.inc_y())
- {
- self_type col(row);
- col.put_hline(w,v); //already clipped
- }
- }
-
- void put_block_clip(int h, int w) { put_block(h,w,value_); }
-
-
- iterator_x operator[](int i)const { assert(data_); return (pointer)(((char*)data_)+i*pitch_); }
-
- iterator_x x() { assert(data_); return data_; }
- iterator_x begin_x() { assert(data_); return data_-x_; }
- iterator_x end_x() { assert(data_); return data_-x_+w_; }
-
- iterator_y y() { assert(data_); return iterator_y(data_,pitch_); }
- iterator_y begin_y() { assert(data_); return iterator_y((pointer)((char*)data_ - y_*pitch_),pitch_); }
- iterator_y end_y() { assert(data_); return iterator_y((pointer)((char*)data_ + (h_-y_)*pitch_),pitch_); }
-
- operator bool()const { return (bool)data_; }
- bool operator!()const { return !data_; }
- bool operator==(const self_type &rhs)const { return data_==rhs.data_; }
- bool operator!=(const self_type &rhs)const { return data_!=rhs.data_; }
- bool clipped(int x, int y)const { return !(x_+x>=0 && y_+y>=0 && x_+x<w_ && y_+y<h_); }
- bool clipped()const { return !(x_>=0 && y_>=0 && x_<w_ && y_<h_); }
-
- difference_type operator-(const self_type &rhs)const
- {
- assert(data_);
- assert(pitch_==rhs.pitch_);
- int ptr_diff=(char*)data_-(char*)rhs.data_-1;
- return difference_type(ptr_diff%pitch_/sizeof(value_type)+1,ptr_diff/pitch_);
- }
-
- self_type operator+(const difference_type &rhs)const
- {
- assert(data_);
- self_type ret(*this);
- ret.move(rhs.x,rhs.y);
- return ret;
- }
-
- difference_type diff_begin()const {return difference_type(-x_,-y_);}
- difference_type diff_end()const {return difference_type(w_-x_,h_-y_);}
-
- self_type get_start()const {return *this + diff_begin(); }
- self_type get_end()const {return *this + diff_end(); }
-
- int get_width()const {return w_;}
- int get_height()const {return h_;}
-
- int get_w()const {return w_;}
- int get_h()const {return h_;}
- int get_pitch()const {return pitch_;}
-};
-
-template <
- typename PEN_,
- typename A_=float,
- class AFFINE_=affine_combo<typename PEN_::value_type,A_>
->
-class alpha_pen : public PEN_
-{
-public:
- typedef A_ alpha_type;
- typedef AFFINE_ affine_func_type;
-
- typedef typename PEN_::value_type value_type;
- typedef alpha_pen self_type;
-
-private:
- alpha_type alpha_;
-
-protected:
- affine_func_type affine_func_;
-
-public:
- using PEN_::get_value;
- using PEN_::get_pen_value;
- using PEN_::inc_x;
- using PEN_::dec_x;
- using PEN_::inc_y;
- using PEN_::dec_y;
- using PEN_::clipped;
- using PEN_::w_;
- using PEN_::h_;
- using PEN_::x_;
- using PEN_::y_;
-
- alpha_pen(const alpha_type &a = 1, const affine_func_type &func = affine_func_type()):alpha_(a),affine_func_(func) { }
- alpha_pen(const PEN_ &x, const alpha_type &a=1, const affine_func_type &func=affine_func_type())
- :PEN_(x),alpha_(a),affine_func_(func) { }
-
- const alpha_type& get_alpha()const { return alpha_; }
- void get_alpha(alpha_type &a) const { a=alpha_; }
- void set_alpha(alpha_type a) { alpha_=a; }
-
- void put_value(const value_type &v, alpha_type a=1)const
- { PEN_::put_value(affine_func_(get_value(),v,alpha_*a)); }
- void put_value()const { put_value(get_pen_value()); }
- void put_value_alpha(alpha_type a)const { put_value(get_pen_value(),a); }
- void put_hline(int l, const alpha_type &a = 1){for(;l>0;l--,inc_x())put_value_alpha(a);}
-
- void put_value_clip(const value_type &v, alpha_type a=1)const
- { if(!clipped())PEN_::put_value(affine_func_(get_value(),v,alpha_*a)); }
- void put_value_clip()const { put_value_clip(get_pen_value()); }
- void put_value_clip_alpha(alpha_type a)const { put_value_clip(get_pen_value(),a); }
- void put_hline_clip(int l, const alpha_type &a = 1){l=std::min(l,w_-x_);for(;l>0;l--,inc_x())put_value_clip_alpha(a);}
-
- //the put_block functions do not modify the pen
- void put_block(int h, int w, const alpha_type &a = 1)
- {
- self_type row(*this);
- for(;h>0;h--,row.inc_y())
- {
- self_type col(row);
- col.put_hline(w,a);
- }
- }
-
- void put_block_clip(int h, int w, const alpha_type &a = 1)
- {
- self_type row(*this);
-
- //clip start position
- if(row.x_ < 0) { w+=row.x_; row.inc_x(-row.x_); }
- if(row.y_ < 0) { h+=row.y_; row.inc_y(-row.y_); }
-
- //clip width and height of copy rect
- h = std::min(h,h_-y_);
- w = std::min(w,w_-x_);
-
- //copy rect
- for(;h>0;h--,row.inc_y())
- {
- self_type col(row);
- col.put_hline(w,a); //already clipped
- }
- }
-};
-
-_ETL_END_NAMESPACE
-
-/* === E X T E R N S ======================================================= */
-
-/* === E N D =============================================================== */
-
-#endif
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