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  <title>ImageMagick: MagickCore, C API for ImageMagick: Read or Write Binary Large OBjects</title>
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<p class="navigation-index">[ <a href="#BlobToImage">BlobToImage</a> | <a href="#ImageToBlob">ImageToBlob</a> | <a href="#ImageToFile">ImageToFile</a> | <a href="#ImagesToBlob">ImagesToBlob</a> ]</p>

<div style="margin: auto;">
  <h2><a name="BlobToImage">BlobToImage</a></h2>
</div>

<p>BlobToImage() implements direct to memory image formats.  It returns the blob as an image.</p>

<p>The format of the BlobToImage method is:</p>

<pre class="code">
  Image *BlobToImage(const ImageInfo *image_info,const void *blob,
    const size_t length,ExceptionInfo *exception)
</pre>

<p>A description of each parameter follows:</p>

<h4>image_info</h4>
<p>The image info.</p>

<h4>blob</h4>
<p>The address of a character stream in one of the image formats understood by ImageMagick.</p>

<h4>length</h4>
<p>This size_t integer reflects the length in bytes of the blob.</p>

<h4>exception</h4>
<p>Return any errors or warnings in this structure.</p>

<div style="margin: auto;">
  <h2><a name="ImageToBlob">ImageToBlob</a></h2>
</div>

<p>ImageToBlob() implements direct to memory image formats.  It returns the image as a blob and its length.  The magick member of the ImageInfo structure determines the format of the returned blob (GIF, JPEG,  PNG, etc.)</p>

<p>The format of the ImageToBlob method is:</p>

<pre class="code">
  unsigned char *ImageToBlob(const ImageInfo *image_info,Image *image,
    size_t *length,ExceptionInfo *exception)
</pre>

<p>A description of each parameter follows:</p>

<h4>image_info</h4>
<p>The image info.</p>

<h4>image</h4>
<p>The image.</p>

<h4>length</h4>
<p>This pointer to a size_t integer sets the initial length of the blob.  On return, it reflects the actual length of the blob.</p>

<h4>exception</h4>
<p>Return any errors or warnings in this structure.</p>

<div style="margin: auto;">
  <h2><a name="ImageToFile">ImageToFile</a></h2>
</div>

<p>ImageToFile() writes an image to a file.  It returns MagickFalse if an error occurs otherwise MagickTrue.</p>

<p>The format of the ImageToFile method is:</p>

<pre class="code">
   MagickBooleanType ImageToFile(Image *image,char *filename,
    ExceptionInfo *exception)
</pre>

<p>A description of each parameter follows:</p>

<h4>image</h4>
<p>The image.</p>

<h4>filename</h4>
<p>Write the image to this file.</p>

<h4>exception</h4>
<p>Return any errors or warnings in this structure.</p>

<div style="margin: auto;">
  <h2><a name="ImagesToBlob">ImagesToBlob</a></h2>
</div>

<p>ImagesToBlob() implements direct to memory image formats.  It returns the image sequence as a blob and its length.  The magick member of the ImageInfo structure determines the format of the returned blob (GIF, JPEG,  PNG, etc.)</p>

<p>Note, some image formats do not permit multiple images to the same image stream (e.g. JPEG).  in this instance, just the first image of the sequence is returned as a blob.</p>

<p>The format of the ImagesToBlob method is:</p>

<pre class="code">
  unsigned char *ImagesToBlob(const ImageInfo *image_info,Image *images,
    size_t *length,ExceptionInfo *exception)
</pre>

<p>A description of each parameter follows:</p>

<h4>image_info</h4>
<p>The image info.</p>

<h4>images</h4>
<p>The image list.</p>

<h4>length</h4>
<p>This pointer to a size_t integer sets the initial length of the blob.  On return, it reflects the actual length of the blob.</p>

<h4>exception</h4>
<p>Return any errors or warnings in this structure.</p>

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