Free Knowledge Resources


Linux Manual Pages


Free Software * Books

Source Code

Free Media

Linux

export(3x)


NAME

   export -     functionality    for    writing    images    into    files
   libAfterImage/export.h

NAMEexport

   - Image output into different file formats.

SEE ALSO

   Structures :
            ASXpmExportParams
            ASPngExportParams
            ASJpegExportParams
            ASGifExportParams
            ASImageExportParams

   Functions :
           ASImage2file()

   Other libAfterImage modules :
            ascmap.h asfont.h asimage.h asvisual.h blender.h export.h
            import.h transform.h ximage.h

AUTHOR

   Sasha Vasko <sasha at aftercode dot net>
   libAfterImage/ExportFlags

NAMEEXPORT_GRAYSCALE

   - save image as grayscale.  EXPORT_ALPHA - save alpha channel if format
   permits  EXPORT_APPEND  - if format allows multiple images - image will
   be appended

FUNCTION

   Some common  flags  that  could  be  used  while  writing  images  into
   different file formats.

SOURCE

       #define  EXPORT_GRAYSCALE            (0x01<<0) #define EXPORT_ALPHA
       (0x01<<1) #define EXPORT_APPEND                (0x01<<3)   /*  adds
       subimage   */  #define  EXPORT_ANIMATION_REPEATS     (0x01<<4)   /*
       number of loops to repeat GIF animation */ /*****/

   libAfterImage/ASPngExportParams

NAMEASPngExportParams

   - parameters for export into PNG file.

SOURCE

       typedef struct {
           ASImageFileTypes type;
           ASFlagType flags ;
           int compression ; }ASPngExportParams ;

   libAfterImage/ASJpegExportParams

NAMEASJpegExportParams

   - parameters for export into JPEG file.

SOURCE

       typedef struct {
           ASImageFileTypes type;
           ASFlagType flags ;
           int quality ; }ASJpegExportParams ;

   libAfterImage/ASGifExportParams

NAMEASGifExportParams

   - parameters for export into GIF file.

SOURCE

       typedef struct {
           ASImageFileTypes type;
           ASFlagType flags ;
           int dither ;
           int opaque_threshold ;
           unsigned short animate_delay ;
           unsigned short animate_repeats ; }ASGifExportParams ;

   libAfterImage/ASTiffExportParams

NAMEASTiffExportParams

   - parameters for export into TIFF file.

SOURCE

       typedef struct {
           ASImageFileTypes type;
           ASFlagType flags ;
           CARD32 rows_per_strip ;

       /*   these    are    suitable    compressions    :    */    #define
       TIFF_COMPRESSION_NONE       1 #define TIFF_COMPRESSION_OJPEG      6
       /* !6.0  JPEG  */  #define  TIFF_COMPRESSION_JPEG        7  #define
       TIFF_COMPRESSION_PACKBITS    32773    /*  Macintosh  RLE */ #define
       TIFF_COMPRESSION_DEFLATE    32946   /* Deflate compression */
           /* you should be able to use other values from tiff.h  as  well
       */
           CARD32 compression_type ;
           int jpeg_quality ;

           int opaque_threshold ; }ASTiffExportParams ;

   libAfterImage/ASImageExportParams

NAMEASImageExportParams

   - union of structures holding parameters for export into different file
   formats.

DESCRIPTION

   Treatment of this union depends on what type of export was requested.

SEE ALSO

   ASImageFileTypes

SOURCE

       typedef union ASImageExportParams {
           ASImageFileTypes   type;
           ASXpmExportParams  xpm;
           ASPngExportParams  png;
           ASJpegExportParams jpeg;
           ASGifExportParams  gif;
           ASTiffExportParams tiff; }ASImageExportParams;

   libAfterImage/export/ASImage2file()

NAMEASImage2file()

SYNOPSIS
   Bool ASImage2file( ASImage *im, const char *dir, const char *file,
                 ASImageFileTypes type, ASImageExportParams *params );


INPUTS
   im     - Image to write out.

   dir    - directory name to write file into (optional, could be NULL)

   file   - file name with or without directory name.

   type   - output file format. ( see ASImageFileTypes )

   params - pointer to ASImageExportParams union's member  for  the  above
          type,  with  additional  export  parameters,  such  as  quality,
          compression, etc. If NULL then all defaults will be used.


RETURN VALUE
   True on success. False - failure.


DESCRIPTION
   ASImage2file will construct filename out of dir and file components and
   then will call specific filter to write out file in requested format.


NOTES
   Some formats support compression, others support lossy compression, yet
   others allows you to limit  number  of  colors  and  colordepth.   Each
   specific filter will try to interpret those parameters in its own way.


EXAMPLE
   asmerge.c: ASMerge.3



	    

	    

	
	    
	    

	      
	      

	      
	    

	    

	
	    
      
Opportunity

      

	
Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity. 
	

	

	  Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.
	

	

	
	
	

	  
	  

	  
	

	

	
	
      
Free Software

      

	

	  Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.
	

	


	

	  Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.
	

	

	      

	

	  
	  

	  
	

	

	
	
      
Free Books

      

	

	  The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.
	

	

	

	  Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the  GNU source code repositories to download the source.
	

	

	

	

	  
	  

	  
	

	

	

      
Education

      

	      
Study at Harvard, Stanford or MIT -
	  Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.
	
     
	

	
	

	  Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts. 
	

	

      

      

	
	  birds banner