Convert image buffer to pdf with ImageMagick in C++
I've downloaded th开发者_如何学Goe dll's for ImageMagick and am wondering if anybody knows of some example code to accomplish a simple task:
I have generated an image in C++ and have the buffer in RGB format. I need to convert it to PDF format (without writing to a file) before sending it over a TCP socket.
Is this doable with ImageMagick (or any other library)?
Assuming you're using Magick++ Magick::Image
has a constructor that can create an image from an in-memory blob and a write() method that can write a PDF (and a bunch of other formats) to an in-memoy blob as well.
Note that on my Linux machine ImageMagick appears to be creating a few temporary files during operation. I'm not sure that meets your requirement but it might be configurable.
You can probably get a good idea from this code snippet:
#include <iostream>
#include <Magick++.h>
using namespace std;
using namespace Magick;
static char imageData[] = {
/* ... */
};
int main(int argc, char** argv)
{
/* Initialize the library */
InitializeMagick(*argv);
/* Instantiate an image from RGB data */
Image image(4, // Width
14, // Height
"RGB", // Color components ordering
CharPixel, // Components storage type
imageData);// Image data
/* Write pdf in memory */
Blob b;
image.write(&b, string("pdf"));
/* write pdf data to cout */
/* it should be easy to send it over a socket instead */
cout.write(static_cast<const char*>(b.data()), b.length());
return 0;
}
Edit: I should probably add that writing binary data to cout
on Windows will cause troubles unless you switch the output stream to binary mode. The code above is just a short sample so I've ignored that.
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