Hej,
I am trying to read a JPEG image and to write it as PPM on stdout:
But despite the fact that I try to change the wand format (using
MagickSetFormat), the written image seems to remain in JPEG format...
Any hint?
many thanks!,
/Christophe.
PS is there any web place with tutorial using the C interface (apart from
the 3 examples provided)... or any more descriptive docs?
Here is the related fragment of code:
// Read an image.
MagickWandGenesis();
magick_wand=NewMagickWand();
status=MagickReadImage(magick_wand,argv[1]);
if (status == MagickFalse)
ThrowWandException(magick_wand);
//set the image format to PPM:
status = MagickSetFormat(magick_wand,"PPM");
if (status == MagickFalse)
ThrowWandException(magick_wand);
//set the image compression:
status = MagickSetCompression(magick_wand, UndefinedCompression);
if (status == MagickFalse)
ThrowWandException(magick_wand);
//set the image pixel depth:
status = MagickSetDepth(magick_wand, 8);
if (status == MagickFalse)
ThrowWandException(magick_wand);
//set the image filename:
status = MagickSetFilename(magick_wand, "");
if (status == MagickFalse)
ThrowWandException(magick_wand);
//write the file to stdout:
status = *MagickWriteImageFile(magick_wand, stdout);
if (status == MagickFalse)
ThrowWandException(magick_wand);*
//free and exit
magick_wand=DestroyMagickWand(magick_wand);
MagickWandTerminus();
return(0);
}
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