PA_GetPictureVariable

version 2003

PA_GetPictureVariable (aVariable; thePicture; pictInfo) → long

The routine PA_GetPictureVariable puts the content of the variable aVariable in the data pointed to by thePicture and returns its size in bytes. In addition, it returns the picture info in pictInfo .

If aVariable has not the kind eVK_Picture , the routine returns 0 and thePicture and pictInfo are returned unchanged.

If the picture size is unknown, call the function a first time with thePicture equal to zero. The returned value will be the size of the needed buffer. Allocate the buffer and call the function again with the correct buffer.

Get a picture variable.

   char            *thePict;
   PA_PictureInfo   theInfo;
   long            pictSize;
 
   // First call the routine with a nil pointer to get the blob size
      pictSize = PA_GetBlobVariable(aVariable, 0L, 0L);
   // Then allocate the buffer
      thePict = malloc(pictSize);
   // If it is ok, get the picture (duplicate it, in fact)
      pictSize = PA_GetBlobVariable(aVariable, thePict, &theInfo);
   // Work with it
      /* . . . */
   // Cleanup
      free(thePict);

PA_GetPictureHandleVariable , PA_PictureInfo .