ImgSource sample code

ImgSource Sample Code

JPG to BMP C/C++ sample using the ImgSource API

JPG to BMPsample using the CISImageEx C++ wrapper class

JPG to BMP using the ImgSource API

This is how you read a JPG and save as BMP, using the ImgSource API directly.

// create the source manager.
// this opens the file for reading.
HISSRC hSource = IS40_OpenFileSource(DPIX"dawnwed.jpg");

// did it work?
if (hSource == NULL)
{
  // no. what happened?
  UINT32 err = IS40_GetLastError();
  return 0;
}

// read the file to a 24-bit RGB bu6ffer
UINT32 uWidth, uHeight;

// this will set uWidth and uHeight
HGLOBAL hImg = IS40_ReadJPG(hSource, &uWidth, &uHeight, 24,0);

// close the source
IS40_CloseSource(hSource);

// did the file read work?
if (hImg!=NULL)
{
  // yes! Get a pointer to the image
  BYTE *pRGB = (BYTE *)hImg;

  // save as BMP

  // open the destination manager. 
  HISDEST hDest = IS40_OpenFileDest("lala.bmp", FALSE);

  if (hDest!=NULL)
  {
     // write the RGB image to a 24-bit BMP
     IS40_WriteBMP(hDest, pRGB, uWidth, uHeight, 24, uWidth * 3, 0, NULL, NULL, 0);

     // close the destination manager
     IS40_CloseDest(hDest);
  }

  // clean up
  GlobalFree(hImg);
}
else
{
  // no. what happened?
  UINT32 err = IS40_GetLastError();
  return 0;
}

JPG to BMP using the CISImageEx C++ Wrapper

// declare a CISImageEx object
CISImageEx img;

// load the image
UINT32 res = img.LoadImage("C:\\input.jpg");
if (res!=IS_ERR_OK)
{
  ... an error occurred}
}
  
// save it
res = img.SaveImage("C:\\output.bmp", eFmtBMP);
if (res!=IS_ERR_OK)
{
  ... an error occurred
}