本帖隐藏的内容
自己移植的！有错误指点！
typedef char Int8;
typedef unsigned char UInt8;
typedef short Int16;
typedef unsigned short UInt16;
typedef long Int32;
typedef unsigned long UInt32;
//图像数据区的描述信息
struct TPixels32Ref{
TUint16* pdata; //图像数据区首地址 即 y==0行的颜色首地址
long byte_width; //一行图像数据的字节宽度 正负值都有可能
long width; //图像宽度
long height; //图像高度
};
下面是转换函数
void CDynamicContainer::Bilinear_Fast_Common(TUint16* PColor0,TUint16* PColor1,unsigned long u_8,unsigned long v_8,TUint16* result)
{
unsigned long pm3_8=(u_8*v_8)>>4;
unsigned long pm2_8=u_8-pm3_8;
unsigned long pm1_8=v_8-pm3_8;
unsigned long pm0_8=16-pm1_8-pm2_8-pm3_8;
unsigned long Color=*(unsigned short*)(PColor0);//565
unsigned long BR=(Color & 0xF81F)*pm0_8;
unsigned long GA=((Color & 0x7E0)>>5)*pm0_8;
Color=((unsigned short*)(PColor0))[1];
GA+=((Color & 0x7E0)>>5)*pm2_8;
BR+=(Color & 0xF81F)*pm2_8;
Color=*(unsigned short*)(PColor1);
GA+=((Color & 0x7E0)>>5)*pm1_8;
BR+=(Color & 0xF81F)*pm1_8;
Color=((unsigned short*)(PColor1))[1];
GA+=((Color & 0x7E0)>>5)*pm3_8;
BR+=(Color & 0xF81F)*pm3_8;
*result=((GA & 0x3F0)<<1)|((BR & 0xF81F0)>>4);
}
void CDynamicContainer::PicZoom_ftBilinear_Common(const TPixels32Ref& Dst,const TPixels32Ref& Src)
{
if ( (0==Dst.width)||(0==Dst.height)
||(2>Src.width)||(2>Src.height)) return;
long xrIntdouble_16=((Src.width-1)<<8)/Dst.width;
long yrIntdouble_16=((Src.height-1)<<8)/Dst.height;
long dst_width=Dst.width;
long Src_byte_width=Src.byte_width;
TUint16* pDstLine=Dst.pdata;
long srcy_16=0;
for (long y=0;y<Dst.height;++y)
{
unsigned long v_8=(srcy_16 & 0xFF)>>4;//16位图时精度4位
TUint16* PSrcLineColor= (TUint16*)((UInt8*)(Src.pdata)+Src_byte_width*(srcy_16>>8)) ;
long srcx_16=0;
for (long x=0;x<dst_width;++x)
{
TUint16* PColor0=&PSrcLineColor[srcx_16>>8];
Bilinear_Fast_Common(PColor0,(TUint16*)((UInt8*)(PColor0)+Src_byte_width),(srcx_16 & 0xFF)>>4,v_8,&pDstLine[x]);
srcx_16+=xrIntdouble_16;
}
srcy_16+=yrIntdouble_16;
((UInt8*&)pDstLine)+=Dst.byte_width;
}
}
void CDynamicContainer::Zoom(CFbsBitmap* Dst, CFbsBitmap* src)
{
TPixels32Ref srcPic;
TPixels32Ref dstPic;
if(src->IsLargeBitmap())
src->LockHeap();
srcPic.pdata=NULL;
srcPic.width=src->SizeInPixels().iWidth;
srcPic.height=src->SizeInPixels().iHeight;
srcPic.byte_width=srcPic.width*sizeof(TUint16);
if(srcPic.pdata)
{
delete[] (TUint16*)srcPic.pdata;
srcPic.pdata=0;
}
srcPic.pdata=(TUint16*)(new UInt8[srcPic.byte_width*srcPic.height]);
memcpy(srcPic.pdata,src->DataAddress(),srcPic.byte_width*srcPic.height);
if(src->IsLargeBitmap())
src->UnlockHeap();
if(Dst->IsLargeBitmap())
Dst->LockHeap();
dstPic.pdata=(TUint16*)(Dst->DataAddress());
dstPic.width=Dst->SizeInPixels().iWidth;
dstPic.height=Dst->SizeInPixels().iHeight;
dstPic.byte_width=dstPic.width*sizeof(TUint16);
PicZoom_ftBilinear_Common(dstPic,srcPic);
if(Dst->IsLargeBitmap())
Dst->UnlockHeap();
if(srcPic.pdata)
{
delete[] (TUint16*)srcPic.pdata;
srcPic.pdata=0;
}
}
N73真机测试比系统的缩放函数快1/5!不知道这数据有没有错误
