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stuff

This commit is contained in:
John Cupitt 2009-11-05 16:27:26 +00:00
parent 7ae8466922
commit 2134a1bee0
1 changed files with 45 additions and 23 deletions
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68
libvips/conversion/im_embed.c
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@ -1,19 +1,4 @@
/* @(#) Opposite of im_extract: embed an image within a larger image. flag
* @(#) controls what appears in the new pels:
* @(#)
* @(#) 0 - black pels (all bytes == 0)
* @(#) 1 - extend pels from image to edge
* @(#) 2 - replicate image
* @(#) 3 - mirror image
* @(#) 4 - white pels (all bytes == 255)
* @(#)
* @(#) int im_embed( in, out, flag, x, y, w, h )
* @(#) IMAGE *in, *out;
* @(#) int flag;
* @(#) int x, y, w, h;
* @(#)
* @(#) All functions return 0 on success and -1 on error
* @(#)
/* im_embed
*
* Author: J. Cupitt
* Written on: 21/2/95
@ -31,6 +16,8 @@
* - more general ... x and y can be negative
* 24/3/09
* - added IM_CODING_RAD support
* 5/11/09
* - gtkdoc
*/
/*
@ -432,17 +419,52 @@ embed( IMAGE *in, IMAGE *out, int flag, int x, int y, int w, int h )
return( 0 );
}
/**
* im_embed:
* @in: input image
* @out: output image
* @flag: how to generate the edge pixels
* @x: place @in at this x position in @out
* @y: place @in at this y position in @out
* @w: @out should be this many pixels across
* @h: @out should be this many pixels down
*
* The opposite of im_extract(): embed an image within a larger image. @flag
* controls what appears in the new pels:
*
* <tgroup cols='2' align='left' colsep='1' rowsep='1'>
* <tbody>
* <row>
* <entry>0</entry>
* <entry>black pels (all bytes == 0)</entry>
* </row>
* <row>
* <entry>1</entry>
* <entry>extend pels from image edge</entry>
* </row>
* <row>
* <entry>2</entry>
* <entry>repeat image</entry>
* </row>
* <row>
* <entry>3</entry>
* <entry>mirror image</entry>
* </row>
* <row>
* <entry>4</entry>
* <entry>white pels (all bytes == 255)</entry>
* </row>
* </tbody>
* </tgroup>
*
* Returns: 0 on success, -1 on error.
*/
int
im_embed( IMAGE *in, IMAGE *out, int flag, int x, int y, int w, int h )
{
if( im_piocheck( in, out ) )
if( im_piocheck( in, out ) ||
im_check_known_coded( "im_embed", in ) )
return( -1 );
if( in->Coding != IM_CODING_NONE &&
in->Coding != IM_CODING_LABQ &&
in->Coding != IM_CODING_RAD ) {
im_error( "im_embed", "%s", _( "unknown image coding type" ) );
return( -1 );
}
if( flag < 0 || flag > 4 ) {
im_error( "im_embed", "%s", _( "unknown flag" ) );
return( -1 );