X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=ETL%2FETL%2F_pen.h;fp=ETL%2FETL%2F_pen.h;h=096570aef873af17e016d845c33c636345b8346b;hb=a095981e18cc37a8ecc7cd237cc22b9c10329264;hp=0000000000000000000000000000000000000000;hpb=9459638ad6797b8139f1e9f0715c96076dbf0890;p=synfig.git

diff --git a/ETL/ETL/_pen.h b/ETL/ETL/_pen.h
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+++ b/ETL/ETL/_pen.h
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+/*! ========================================================================
+** 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]; }
+
+	const value_type get_value_clip()const { assert(data_); if(clipped())return value_type(); return *data_; }
+
+	const 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