71 lines
1.8 KiB
C++
71 lines
1.8 KiB
C++
|
#include"Image2D.h"
|
||
|
|
struct HalfImage
|
||
|
|
{
|
||
|
|
virtual void Process(void *,void *,const uint,const uint,const uint)=0;
|
||
|
|
};
|
||
|
|
|
||
|
|
template<typename T>
|
||
|
|
struct HalfImageImple:public HalfImage
|
||
|
|
{
|
||
|
|
void Process(void *target,void *source,const uint width,const uint height,const uint channels) override
|
||
|
|
{
|
||
|
|
const uint line_length=width*channels;
|
||
|
|
|
||
|
|
T *tp=(T *)target;
|
||
|
|
|
||
|
|
T *sp0=(T *)source;
|
||
|
|
T *sp1=sp0+channels;
|
||
|
|
T *sp2=sp0+line_length;
|
||
|
|
T *sp3=sp1+line_length;
|
||
|
|
|
||
|
|
for(uint row=0;row<height;row+=2)
|
||
|
|
{
|
||
|
|
for(uint col=0;col<=width;col+=2)
|
||
|
|
{
|
||
|
|
for(uint i=0;i<channels;i++)
|
||
|
|
{
|
||
|
|
*tp=((*sp0)+(*sp1)+(*sp2)+(*sp3))/T(4);
|
||
|
|
++tp;
|
||
|
|
|
||
|
|
++sp0;
|
||
|
|
++sp1;
|
||
|
|
++sp2;
|
||
|
|
++sp3;
|
||
|
|
}
|
||
|
|
|
||
|
|
sp0+=channels;
|
||
|
|
sp1+=channels;
|
||
|
|
sp2+=channels;
|
||
|
|
sp3+=channels;
|
||
|
|
}
|
||
|
|
|
||
|
|
sp0+=line_length;
|
||
|
|
sp1+=line_length;
|
||
|
|
sp2+=line_length;
|
||
|
|
sp3+=line_length;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
Image2D *Image2D::CreateHalfImage()
|
||
|
|
{
|
||
|
|
HalfImage *hi;
|
||
|
|
|
||
|
|
if(type==PixelDataType::U8 )hi=new HalfImageImple<uint8>;else
|
||
|
|
if(type==PixelDataType::U16)hi=new HalfImageImple<uint16>;else
|
||
|
|
if(type==PixelDataType::U32)hi=new HalfImageImple<uint32>;else
|
||
|
|
if(type==PixelDataType::F32)hi=new HalfImageImple<float>;else
|
||
|
|
if(type==PixelDataType::F64)hi=new HalfImageImple<double>;else
|
||
|
|
return(nullptr);
|
||
|
|
|
||
|
|
uint hw=width>>1;
|
||
|
|
uint hh=height>>1;
|
||
|
|
|
||
|
|
void *new_data=new uint8[hw*hh*channels];
|
||
|
|
|
||
|
|
hi->Process(new_data,data,width,height,channels);
|
||
|
|
|
||
|
|
delete hi;
|
||
|
|
|
||
|
|
return(new Image2D(hw,hh,channels,type,new_data));
|
||
|
|
}
|