////////////////////////////////////////////////////////////////
//
// CPixelsManager::ChangePixelsFormat
//
// JPEG <-> PNG <-> PLAIN
//
////////////////////////////////////////////////////////////////
bool CPixelsManager::ChangePixelsFormat ( const CPixels& oldPixels, CPixels& newPixels, EPixelsFormatType newFormat, int uiQuality )
{
EPixelsFormatType oldFormat = GetPixelsFormat ( oldPixels );
if ( oldFormat == EPixelsFormat::UNKNOWN || newFormat == EPixelsFormat::UNKNOWN )
return false;
if ( oldFormat == newFormat )
{
// No change
newPixels = oldPixels;
return true;
}
if ( oldFormat == EPixelsFormat::PLAIN )
{
// Encode
uint uiWidth, uiHeight;
if ( !GetPixelsSize ( oldPixels, uiWidth, uiHeight ) )
return false;
if ( newFormat == EPixelsFormat::JPEG )
return JpegEncode ( uiWidth, uiHeight, uiQuality, oldPixels.GetData (), oldPixels.GetSize () - 4, newPixels.buffer );
else
if ( newFormat == EPixelsFormat::PNG )
return PngEncode ( uiWidth, uiHeight, oldPixels.GetData (), oldPixels.GetSize () - 4, newPixels.buffer );
}
else
if ( newFormat == EPixelsFormat::PLAIN )
{
// Decode
if ( oldFormat == EPixelsFormat::JPEG )
{
uint uiWidth, uiHeight;
if ( JpegDecode ( oldPixels.GetData (), oldPixels.GetSize (), newPixels.buffer, uiWidth, uiHeight ) )
{
newPixels.buffer.SetSize ( uiWidth * uiHeight * 4 + SIZEOF_PLAIN_TAIL );
return SetPlainDimensions ( newPixels, uiWidth, uiHeight );
}
}
else
if ( oldFormat == EPixelsFormat::PNG )
{
uint uiWidth, uiHeight;
if ( PngDecode ( oldPixels.GetData (), oldPixels.GetSize (), newPixels.buffer, uiWidth, uiHeight ) )
{
newPixels.buffer.SetSize ( uiWidth * uiHeight * 4 + SIZEOF_PLAIN_TAIL );
return SetPlainDimensions ( newPixels, uiWidth, uiHeight );
}
}
}
else
{
// Recode
CPixels tempPixels;
if ( ChangePixelsFormat ( oldPixels, tempPixels, EPixelsFormat::PLAIN ) )
return ChangePixelsFormat ( tempPixels, newPixels, newFormat, uiQuality );
}
return false;
}
void main()
{
FILE *fp;
int file_len;
fp = fopen("E:\\WORK\\JPEGSR6\\JPEG-6B\\DSC00115.JPG","rb");
fseek(fp,0,SEEK_END);
file_len = ftell(fp);
fseek(fp,0,SEEK_SET);
fread(in_buf,1,file_len,fp);
fclose(fp);
JpegDecode(in_buf,out_buf);
fp = fopen("E:\\WORK\\JPEGSR6\\JPEG-6B\\out.raw","wb");
fwrite(out_buf,1,640*480*3,fp);
fclose(fp);
}
///////////////////////////////////////////////////////////////
//
// JpegGetDimensions
//
// This needs optimizing
//
///////////////////////////////////////////////////////////////
bool JpegGetDimensions ( const void* pData, uint uiDataSize, uint& uiOutWidth, uint& uiOutHeight )
{
CBuffer temp;
return JpegDecode ( pData, uiDataSize, temp, uiOutWidth, uiOutHeight );
}
///////////////////////////////////////////////////////////////
//
// JpegGetDimensions
//
//
//
///////////////////////////////////////////////////////////////
bool JpegGetDimensions(const void* pData, uint uiDataSize, uint& uiOutWidth, uint& uiOutHeight)
{
return JpegDecode(pData, uiDataSize, nullptr, uiOutWidth, uiOutHeight);
}
