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/*
* File: ImaIter.h
* Purpose: Declaration of the Platform Independent Image Base Class
* Author: Alejandro Aguilar Sierra
* Created: 1995
* Copyright: (c) 1995, Alejandro Aguilar Sierra <asierra(at)servidor(dot)unam(dot)mx>
*
* 07/08/2001 Davide Pizzolato - www.xdp.it
* - removed slow loops
* - added safe checks
*
* Permission is given by the author to freely redistribute and include
* this code in any program as int32_t as this credit is given where due.
*
* COVERED CODE IS PROVIDED UNDER THIS LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTY
* OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, WARRANTIES
* THAT THE COVERED CODE IS FREE OF DEFECTS, MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE
* OR NON-INFRINGING. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE COVERED
* CODE IS WITH YOU. SHOULD ANY COVERED CODE PROVE DEFECTIVE IN ANY RESPECT, YOU (NOT
* THE INITIAL DEVELOPER OR ANY OTHER CONTRIBUTOR) ASSUME THE COST OF ANY NECESSARY
* SERVICING, REPAIR OR CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL
* PART OF THIS LICENSE. NO USE OF ANY COVERED CODE IS AUTHORIZED HEREUNDER EXCEPT UNDER
* THIS DISCLAIMER.
*
* Use at your own risk!
* ==========================================================
*/
#if !defined(__ImaIter_h)
#define __ImaIter_h
#include "ximage.h"
#include "ximadef.h"
class CImageIterator
{
friend class CxImage;
protected:
int32_t Itx, Ity; // Counters
int32_t Stepx, Stepy;
uint8_t* IterImage; // Image pointer
CxImage *ima;
public:
// Constructors
CImageIterator ( void );
CImageIterator ( CxImage *image );
operator CxImage* ();
// Iterators
BOOL ItOK ();
void Reset ();
void Upset ();
void SetRow(uint8_t *buf, int32_t n);
void GetRow(uint8_t *buf, int32_t n);
uint8_t GetByte( ) { return IterImage[Itx]; }
void SetByte(uint8_t b) { IterImage[Itx] = b; }
uint8_t* GetRow(void);
uint8_t* GetRow(int32_t n);
BOOL NextRow();
BOOL PrevRow();
BOOL NextByte();
BOOL PrevByte();
void SetSteps(int32_t x, int32_t y=0) { Stepx = x; Stepy = y; }
void GetSteps(int32_t *x, int32_t *y) { *x = Stepx; *y = Stepy; }
BOOL NextStep();
BOOL PrevStep();
void SetY(int32_t y); /* AD - for interlace */
int32_t GetY() {return Ity;}
BOOL GetCol(uint8_t* pCol, uint32_t x);
BOOL SetCol(uint8_t* pCol, uint32_t x);
};
/////////////////////////////////////////////////////////////////////
inline
CImageIterator::CImageIterator(void)
{
ima = 0;
IterImage = 0;
Itx = Ity = 0;
Stepx = Stepy = 0;
}
/////////////////////////////////////////////////////////////////////
inline
CImageIterator::CImageIterator(CxImage *imageImpl): ima(imageImpl)
{
if (ima) IterImage = ima->GetBits();
Itx = Ity = 0;
Stepx = Stepy = 0;
}
/////////////////////////////////////////////////////////////////////
inline
CImageIterator::operator CxImage* ()
{
return ima;
}
/////////////////////////////////////////////////////////////////////
inline BOOL CImageIterator::ItOK ()
{
if (ima) return ima->IsInside(Itx, Ity);
else return FALSE;
}
/////////////////////////////////////////////////////////////////////
inline void CImageIterator::Reset()
{
if (ima) IterImage = ima->GetBits();
else IterImage=0;
Itx = Ity = 0;
}
/////////////////////////////////////////////////////////////////////
inline void CImageIterator::Upset()
{
Itx = 0;
Ity = ima->GetHeight()-1;
IterImage = ima->GetBits() + ima->GetEffWidth()*(ima->GetHeight()-1);
}
/////////////////////////////////////////////////////////////////////
inline BOOL CImageIterator::NextRow()
{
if (++Ity >= (int32_t)ima->GetHeight()) return 0;
IterImage += ima->GetEffWidth();
return 1;
}
/////////////////////////////////////////////////////////////////////
inline BOOL CImageIterator::PrevRow()
{
if (--Ity < 0) return 0;
IterImage -= ima->GetEffWidth();
return 1;
}
/* AD - for interlace */
inline void CImageIterator::SetY(int32_t y)
{
if ((y < 0) || (y > (int32_t)ima->GetHeight())) return;
Ity = y;
IterImage = ima->GetBits() + ima->GetEffWidth()*y;
}
/////////////////////////////////////////////////////////////////////
inline void CImageIterator::SetRow(uint8_t *buf, int32_t n)
{
if (n<0) n = (int32_t)ima->GetEffWidth();
else n = min(n,(int32_t)ima->GetEffWidth());
if ((IterImage!=NULL)&&(buf!=NULL)&&(n>0)) memcpy(IterImage,buf,n);
}
/////////////////////////////////////////////////////////////////////
inline void CImageIterator::GetRow(uint8_t *buf, int32_t n)
{
if ((IterImage!=NULL)&&(buf!=NULL)&&(n>0))
memcpy(buf,IterImage,min(n,(int32_t)ima->GetEffWidth()));
}
/////////////////////////////////////////////////////////////////////
inline uint8_t* CImageIterator::GetRow()
{
return IterImage;
}
/////////////////////////////////////////////////////////////////////
inline uint8_t* CImageIterator::GetRow(int32_t n)
{
SetY(n);
return IterImage;
}
/////////////////////////////////////////////////////////////////////
inline BOOL CImageIterator::NextByte()
{
if (++Itx < (int32_t)ima->GetEffWidth()) return 1;
else
if (++Ity < (int32_t)ima->GetHeight()){
IterImage += ima->GetEffWidth();
Itx = 0;
return 1;
} else
return 0;
}
/////////////////////////////////////////////////////////////////////
inline BOOL CImageIterator::PrevByte()
{
if (--Itx >= 0) return 1;
else
if (--Ity >= 0){
IterImage -= ima->GetEffWidth();
Itx = 0;
return 1;
} else
return 0;
}
/////////////////////////////////////////////////////////////////////
inline BOOL CImageIterator::NextStep()
{
Itx += Stepx;
if (Itx < (int32_t)ima->GetEffWidth()) return 1;
else {
Ity += Stepy;
if (Ity < (int32_t)ima->GetHeight()){
IterImage += ima->GetEffWidth();
Itx = 0;
return 1;
} else
return 0;
}
}
/////////////////////////////////////////////////////////////////////
inline BOOL CImageIterator::PrevStep()
{
Itx -= Stepx;
if (Itx >= 0) return 1;
else {
Ity -= Stepy;
if (Ity >= 0 && Ity < (int32_t)ima->GetHeight()) {
IterImage -= ima->GetEffWidth();
Itx = 0;
return 1;
} else
return 0;
}
}
/////////////////////////////////////////////////////////////////////
inline BOOL CImageIterator::GetCol(uint8_t* pCol, uint32_t x)
{
if ((pCol==0)||(ima->GetBpp()<8)||(x>=ima->GetWidth()))
return 0;
uint32_t h = ima->GetHeight();
//uint32_t line = ima->GetEffWidth();
uint8_t bytes = (uint8_t)(ima->GetBpp()>>3);
uint8_t* pSrc;
for (uint32_t y=0;y<h;y++){
pSrc = ima->GetBits(y) + x*bytes;
for (uint8_t w=0;w<bytes;w++){
*pCol++=*pSrc++;
}
}
return 1;
}
/////////////////////////////////////////////////////////////////////
inline BOOL CImageIterator::SetCol(uint8_t* pCol, uint32_t x)
{
if ((pCol==0)||(ima->GetBpp()<8)||(x>=ima->GetWidth()))
return 0;
uint32_t h = ima->GetHeight();
//uint32_t line = ima->GetEffWidth();
uint8_t bytes = (uint8_t)(ima->GetBpp()>>3);
uint8_t* pSrc;
for (uint32_t y=0;y<h;y++){
pSrc = ima->GetBits(y) + x*bytes;
for (uint8_t w=0;w<bytes;w++){
*pSrc++=*pCol++;
}
}
return 1;
}
/////////////////////////////////////////////////////////////////////
#endif
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