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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<a href="#VipsImage.synopsis" class="shortcut">Top</a>
                   | 
                  <a href="#VipsImage.description" class="shortcut">Description</a>
                   | 
                  <a href="#VipsImage.object-hierarchy" class="shortcut">Object Hierarchy</a>
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                  <a href="#VipsImage.properties" class="shortcut">Properties</a>
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                  <a href="#VipsImage.signals" class="shortcut">Signals</a>
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<div class="refentry">
<a name="VipsImage"></a><div class="titlepage"></div>
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<td valign="top">
<h2><span class="refentrytitle"><a name="VipsImage.top_of_page"></a>VipsImage</span></h2>
<p>VipsImage — the VIPS image class</p>
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<td valign="top" align="right"></td>
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<div class="refsect1">
<a name="VipsImage.stability-level"></a><h2>Stability Level</h2>
Stable, unless otherwise indicated
</div>
<div class="refsynopsisdiv">
<a name="VipsImage.synopsis"></a><h2>Synopsis</h2>
<a name="VipsDemandStyle"></a><a name="VipsImageType"></a><a name="VipsInterpretation"></a><a name="VipsBandFormat"></a><a name="VipsCoding"></a><pre class="synopsis">
#include &lt;vips/vips.h&gt;

#define             <a class="link" href="VipsImage.html#VIPS-MAGIC-INTEL:CAPS" title="VIPS_MAGIC_INTEL">VIPS_MAGIC_INTEL</a>
#define             <a class="link" href="VipsImage.html#VIPS-MAGIC-SPARC:CAPS" title="VIPS_MAGIC_SPARC">VIPS_MAGIC_SPARC</a>
enum                <a class="link" href="VipsImage.html#VipsDemandStyle">VipsDemandStyle</a>;
enum                <a class="link" href="VipsImage.html#VipsImageType">VipsImageType</a>;
enum                <a class="link" href="VipsImage.html#VipsInterpretation">VipsInterpretation</a>;
enum                <a class="link" href="VipsImage.html#VipsBandFormat">VipsBandFormat</a>;
enum                <a class="link" href="VipsImage.html#VipsCoding">VipsCoding</a>;
                    <a class="link" href="VipsImage.html#VipsProgress" title="VipsProgress">VipsProgress</a>;
                    <a class="link" href="VipsImage.html#VipsImage-struct" title="VipsImage">VipsImage</a>;
                    <a class="link" href="VipsImage.html#VipsImageClass" title="VipsImageClass">VipsImageClass</a>;
#define             <a class="link" href="VipsImage.html#VIPS-IMAGE-SIZEOF-ELEMENT:CAPS" title="VIPS_IMAGE_SIZEOF_ELEMENT()">VIPS_IMAGE_SIZEOF_ELEMENT</a>           (I)
#define             <a class="link" href="VipsImage.html#VIPS-IMAGE-SIZEOF-PEL:CAPS" title="VIPS_IMAGE_SIZEOF_PEL()">VIPS_IMAGE_SIZEOF_PEL</a>               (I)
#define             <a class="link" href="VipsImage.html#VIPS-IMAGE-SIZEOF-LINE:CAPS" title="VIPS_IMAGE_SIZEOF_LINE()">VIPS_IMAGE_SIZEOF_LINE</a>              (I)
#define             <a class="link" href="VipsImage.html#VIPS-IMAGE-SIZEOF-IMAGE:CAPS" title="VIPS_IMAGE_SIZEOF_IMAGE()">VIPS_IMAGE_SIZEOF_IMAGE</a>             (I)
#define             <a class="link" href="VipsImage.html#VIPS-IMAGE-N-ELEMENTS:CAPS" title="VIPS_IMAGE_N_ELEMENTS()">VIPS_IMAGE_N_ELEMENTS</a>               (I)
#define             <a class="link" href="VipsImage.html#VIPS-IMAGE-ADDR:CAPS" title="VIPS_IMAGE_ADDR()">VIPS_IMAGE_ADDR</a>                     (I,
                                                         X,
                                                         Y)
<span class="returnvalue">int</span>                 <a class="link" href="VipsImage.html#vips-image-written" title="vips_image_written ()">vips_image_written</a>                  (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="VipsImage.html#vips-image-invalidate-all" title="vips_image_invalidate_all ()">vips_image_invalidate_all</a>           (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="VipsImage.html#vips-image-preeval" title="vips_image_preeval ()">vips_image_preeval</a>                  (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="VipsImage.html#vips-image-eval" title="vips_image_eval ()">vips_image_eval</a>                     (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> w</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> h</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="VipsImage.html#vips-image-posteval" title="vips_image_posteval ()">vips_image_posteval</a>                 (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="VipsImage.html#vips-image-set-progress" title="vips_image_set_progress ()">vips_image_set_progress</a>             (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>,
                                                         <em class="parameter"><code><span class="type">gboolean</span> progress</code></em>);
<span class="returnvalue">gboolean</span>            <a class="link" href="VipsImage.html#vips-image-get-kill" title="vips_image_get_kill ()">vips_image_get_kill</a>                 (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="VipsImage.html#vips-image-set-kill" title="vips_image_set_kill ()">vips_image_set_kill</a>                 (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>,
                                                         <em class="parameter"><code><span class="type">gboolean</span> kill</code></em>);
<a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *         <a class="link" href="VipsImage.html#vips-image-new" title="vips_image_new ()">vips_image_new</a>                      (<em class="parameter"><code><span class="type">void</span></code></em>);
<span class="returnvalue">int</span>                 <a class="link" href="VipsImage.html#vips-image-new-array" title="vips_image_new_array ()">vips_image_new_array</a>                (<em class="parameter"><code><a class="link" href="libvips-VipsArgument.html#VipsObject"><span class="type">VipsObject</span></a> *parent</code></em>,
                                                         <em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> **images</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> n</code></em>);
<a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *         <a class="link" href="VipsImage.html#vips-image-new-mode" title="vips_image_new_mode ()">vips_image_new_mode</a>                 (<em class="parameter"><code>const <span class="type">char</span> *filename</code></em>,
                                                         <em class="parameter"><code>const <span class="type">char</span> *mode</code></em>);
<a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *         <a class="link" href="VipsImage.html#vips-image-new-from-file" title="vips_image_new_from_file ()">vips_image_new_from_file</a>            (<em class="parameter"><code>const <span class="type">char</span> *filename</code></em>);
<a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *         <a class="link" href="VipsImage.html#vips-image-new-from-file-raw" title="vips_image_new_from_file_raw ()">vips_image_new_from_file_raw</a>        (<em class="parameter"><code>const <span class="type">char</span> *filename</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> xsize</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> ysize</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> bands</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> offset</code></em>);
<a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *         <a class="link" href="VipsImage.html#vips-image-new-from-memory" title="vips_image_new_from_memory ()">vips_image_new_from_memory</a>          (<em class="parameter"><code><span class="type">void</span> *buffer</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> xsize</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> ysize</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> bands</code></em>,
                                                         <em class="parameter"><code><a class="link" href="VipsImage.html#VipsBandFormat"><span class="type">VipsBandFormat</span></a> bandfmt</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="VipsImage.html#vips-image-set-delete-on-close" title="vips_image_set_delete_on_close ()">vips_image_set_delete_on_close</a>      (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>,
                                                         <em class="parameter"><code><span class="type">gboolean</span> delete_on_close</code></em>);
<a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *         <a class="link" href="VipsImage.html#vips-image-new-disc-temp" title="vips_image_new_disc_temp ()">vips_image_new_disc_temp</a>            (<em class="parameter"><code>const <span class="type">char</span> *format</code></em>);
<span class="returnvalue">int</span>                 <a class="link" href="VipsImage.html#vips-image-write" title="vips_image_write ()">vips_image_write</a>                    (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>,
                                                         <em class="parameter"><code>const <span class="type">char</span> *filename</code></em>);
<span class="returnvalue">gboolean</span>            <a class="link" href="VipsImage.html#vips-image-isMSBfirst" title="vips_image_isMSBfirst ()">vips_image_isMSBfirst</a>               (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>);
<span class="returnvalue">gboolean</span>            <a class="link" href="VipsImage.html#vips-image-isfile" title="vips_image_isfile ()">vips_image_isfile</a>                   (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>);
<span class="returnvalue">gboolean</span>            <a class="link" href="VipsImage.html#vips-image-ispartial" title="vips_image_ispartial ()">vips_image_ispartial</a>                (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>);
<span class="returnvalue">int</span>                 <a class="link" href="VipsImage.html#vips-image-write-line" title="vips_image_write_line ()">vips_image_write_line</a>               (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> ypos</code></em>,
                                                         <em class="parameter"><code><span class="type">PEL</span> *linebuffer</code></em>);
<span class="returnvalue">int</span>                 <a class="link" href="VipsImage.html#vips-image-wio-input" title="vips_image_wio_input ()">vips_image_wio_input</a>                (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>);
<span class="returnvalue">int</span>                 <a class="link" href="VipsImage.html#vips-image-wio-output" title="vips_image_wio_output ()">vips_image_wio_output</a>               (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>);
<span class="returnvalue">int</span>                 <a class="link" href="VipsImage.html#vips-image-inplace" title="vips_image_inplace ()">vips_image_inplace</a>                  (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>);
<span class="returnvalue">int</span>                 <a class="link" href="VipsImage.html#vips-image-pio-input" title="vips_image_pio_input ()">vips_image_pio_input</a>                (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>);
<span class="returnvalue">int</span>                 <a class="link" href="VipsImage.html#vips-image-pio-output" title="vips_image_pio_output ()">vips_image_pio_output</a>               (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>);
<span class="returnvalue">gboolean</span>            <a class="link" href="VipsImage.html#vips-band-format-isint" title="vips_band_format_isint ()">vips_band_format_isint</a>              (<em class="parameter"><code><a class="link" href="VipsImage.html#VipsBandFormat"><span class="type">VipsBandFormat</span></a> format</code></em>);
<span class="returnvalue">gboolean</span>            <a class="link" href="VipsImage.html#vips-band-format-isuint" title="vips_band_format_isuint ()">vips_band_format_isuint</a>             (<em class="parameter"><code><a class="link" href="VipsImage.html#VipsBandFormat"><span class="type">VipsBandFormat</span></a> format</code></em>);
<span class="returnvalue">gboolean</span>            <a class="link" href="VipsImage.html#vips-band-format-isfloat" title="vips_band_format_isfloat ()">vips_band_format_isfloat</a>            (<em class="parameter"><code><a class="link" href="VipsImage.html#VipsBandFormat"><span class="type">VipsBandFormat</span></a> format</code></em>);
<span class="returnvalue">gboolean</span>            <a class="link" href="VipsImage.html#vips-band-format-iscomplex" title="vips_band_format_iscomplex ()">vips_band_format_iscomplex</a>          (<em class="parameter"><code><a class="link" href="VipsImage.html#VipsBandFormat"><span class="type">VipsBandFormat</span></a> format</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="VipsImage.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="synopsis">
  GEnum
   +----VipsDemandStyle
</pre>
<pre class="synopsis">
  GEnum
   +----VipsImageType
</pre>
<pre class="synopsis">
  GEnum
   +----VipsInterpretation
</pre>
<pre class="synopsis">
  GEnum
   +----VipsBandFormat
</pre>
<pre class="synopsis">
  GEnum
   +----VipsCoding
</pre>
<pre class="synopsis">
  GObject
   +----<a class="link" href="libvips-VipsArgument.html#VipsObject">VipsObject</a>
         +----VipsImage
</pre>
</div>
<div class="refsect1">
<a name="VipsImage.properties"></a><h2>Properties</h2>
<pre class="synopsis">
  "<a class="link" href="VipsImage.html#VipsImage--bands" title='The "bands" property'>bands</a>"                    <span class="type">gint</span>                  : Read / Write
  "<a class="link" href="VipsImage.html#VipsImage--demand" title='The "demand" property'>demand</a>"                   <a class="link" href="VipsImage.html#VipsDemandStyle"><span class="type">VipsDemandStyle</span></a>       : Read / Write
  "<a class="link" href="VipsImage.html#VipsImage--filename" title='The "filename" property'>filename</a>"                 <span class="type">gchar</span>*                : Read / Write
  "<a class="link" href="VipsImage.html#VipsImage--foreign-buffer" title='The "foreign-buffer" property'>foreign-buffer</a>"           <span class="type">gpointer</span>              : Read / Write
  "<a class="link" href="VipsImage.html#VipsImage--format" title='The "format" property'>format</a>"                   <a class="link" href="VipsImage.html#VipsBandFormat"><span class="type">VipsBandFormat</span></a>        : Read / Write
  "<a class="link" href="VipsImage.html#VipsImage--height" title='The "height" property'>height</a>"                   <span class="type">gint</span>                  : Read / Write
  "<a class="link" href="VipsImage.html#VipsImage--kill" title='The "kill" property'>kill</a>"                     <span class="type">gboolean</span>              : Read / Write
  "<a class="link" href="VipsImage.html#VipsImage--mode" title='The "mode" property'>mode</a>"                     <span class="type">gchar</span>*                : Read / Write
  "<a class="link" href="VipsImage.html#VipsImage--sizeof-header" title='The "sizeof-header" property'>sizeof-header</a>"            <span class="type">gint</span>                  : Read / Write
  "<a class="link" href="VipsImage.html#VipsImage--width" title='The "width" property'>width</a>"                    <span class="type">gint</span>                  : Read / Write
</pre>
</div>
<div class="refsect1">
<a name="VipsImage.signals"></a><h2>Signals</h2>
<pre class="synopsis">
  "<a class="link" href="VipsImage.html#VipsImage-eval" title='The "eval" signal'>eval</a>"                                           : <code class="literal">Run Last</code>
  "<a class="link" href="VipsImage.html#VipsImage-invalidate" title='The "invalidate" signal'>invalidate</a>"                                     : <code class="literal">Action</code>
  "<a class="link" href="VipsImage.html#VipsImage-posteval" title='The "posteval" signal'>posteval</a>"                                       : <code class="literal">Run Last</code>
  "<a class="link" href="VipsImage.html#VipsImage-preeval" title='The "preeval" signal'>preeval</a>"                                        : <code class="literal">Run Last</code>
  "<a class="link" href="VipsImage.html#VipsImage-written" title='The "written" signal'>written</a>"                                        : <code class="literal">Action</code>
</pre>
</div>
<div class="refsect1">
<a name="VipsImage.description"></a><h2>Description</h2>
<p>
The image class and associated types and macros.
</p>
<p>
<a class="link" href="VipsImage.html#vips-image-wio-input" title="vips_image_wio_input ()"><code class="function">vips_image_wio_input()</code></a> and friends indicate the image IO style you
intend to use, transforming the underlying <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> structure if
necessary.
</p>
</div>
<div class="refsect1">
<a name="VipsImage.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="VIPS-MAGIC-INTEL:CAPS"></a><h3>VIPS_MAGIC_INTEL</h3>
<pre class="programlisting">#define VIPS_MAGIC_INTEL (0xb6a6f208U)
</pre>
<p>
The first four bytes of a VIPS file in Intel byte ordering.
</p>
</div>
<hr>
<div class="refsect2">
<a name="VIPS-MAGIC-SPARC:CAPS"></a><h3>VIPS_MAGIC_SPARC</h3>
<pre class="programlisting">#define VIPS_MAGIC_SPARC (0x08f2a6b6U)
</pre>
<p>
The first four bytes of a VIPS file in SPARC byte ordering.
</p>
</div>
<hr>
<div class="refsect2">
<a name="VipsDemandStyle"></a><h3>enum VipsDemandStyle</h3>
<pre class="programlisting">typedef enum {
	VIPS_DEMAND_STYLE_SMALLTILE,	
	VIPS_DEMAND_STYLE_FATSTRIP,
	VIPS_DEMAND_STYLE_THINSTRIP,
	VIPS_DEMAND_STYLE_ANY			
} VipsDemandStyle;
</pre>
<p>
See <a class="link" href="libvips-generate.html#vips-demand-hint" title="vips_demand_hint ()"><code class="function">vips_demand_hint()</code></a>. Operations can hint to the VIPS image IO system about
the kind of demand geometry they prefer. 
</p>
<p>
These demand styles are given below in order of increasing
restrictiveness.  When demanding output from a pipeline, 
<a class="link" href="libvips-generate.html#vips-image-generate" title="vips_image_generate ()"><code class="function">vips_image_generate()</code></a>
will use the most restrictive of the styles requested by the operations 
in the pipeline.
</p>
<p>
VIPS_DEMAND_STYLE_THINSTRIP --- This operation would like to output strips 
the width of the image and a few pels high. This is option suitable for 
point-to-point operations, such as those in the arithmetic package.
</p>
<p>
This option is only efficient for cases where each output pel depends 
upon the pel in the corresponding position in the input image.
</p>
<p>
VIPS_DEMAND_STYLE_FATSTRIP --- This operation would like to output strips 
the width of the image and as high as possible. This option is suitable 
for area operations which do not violently transform coordinates, such 
as <a class="link" href="libvips-convolution.html#im-conv" title="im_conv ()"><code class="function">im_conv()</code></a>. 
</p>
<p>
VIPS_DEMAND_STYLE_SMALLTILE --- This is the most general demand format.
Output is demanded in small (around 100x100 pel) sections. This style works 
reasonably efficiently, even for bizzare operations like 45 degree rotate.
</p>
<p>
VIPS_DEMAND_STYLE_ANY --- This image is not being demand-read from a disc 
file (even indirectly) so any demand style is OK. It's used for things like
<a class="link" href="libvips-conversion.html#im-black" title="im_black ()"><code class="function">im_black()</code></a> where the pixels are calculated.
</p>
<p>
See also: <a class="link" href="libvips-generate.html#vips-demand-hint" title="vips_demand_hint ()"><code class="function">vips_demand_hint()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><a name="VIPS-DEMAND-STYLE-SMALLTILE:CAPS"></a><span class="term"><code class="literal">VIPS_DEMAND_STYLE_SMALLTILE</code></span></p></td>
<td>demand in small (typically 64x64 pixel) tiles
</td>
</tr>
<tr>
<td><p><a name="VIPS-DEMAND-STYLE-FATSTRIP:CAPS"></a><span class="term"><code class="literal">VIPS_DEMAND_STYLE_FATSTRIP</code></span></p></td>
<td>demand in fat (typically 10 pixel high) strips
</td>
</tr>
<tr>
<td><p><a name="VIPS-DEMAND-STYLE-THINSTRIP:CAPS"></a><span class="term"><code class="literal">VIPS_DEMAND_STYLE_THINSTRIP</code></span></p></td>
<td>demand in thin (typically 1 pixel high) strips
</td>
</tr>
<tr>
<td><p><a name="VIPS-DEMAND-STYLE-ANY:CAPS"></a><span class="term"><code class="literal">VIPS_DEMAND_STYLE_ANY</code></span></p></td>
<td>demand geometry does not matter
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="VipsImageType"></a><h3>enum VipsImageType</h3>
<pre class="programlisting">typedef enum {
	VIPS_IMAGE_NONE,		/* no type set */
	VIPS_IMAGE_SETBUF,		/* malloced memory array */
	VIPS_IMAGE_SETBUF_FOREIGN, /* memory array, don't free on close */
	VIPS_IMAGE_OPENIN,		/* input from fd with a window */
	VIPS_IMAGE_MMAPIN,		/* memory mapped input file */
	VIPS_IMAGE_MMAPINRW,		/* memory mapped read/write file */
	VIPS_IMAGE_OPENOUT,		/* output to fd */
	VIPS_IMAGE_PARTIAL		/* partial image */
} VipsImageType;
</pre>
</div>
<hr>
<div class="refsect2">
<a name="VipsInterpretation"></a><h3>enum VipsInterpretation</h3>
<pre class="programlisting">typedef enum {
	VIPS_INTERPRETATION_MULTIBAND = 0,
	VIPS_INTERPRETATION_B_W = 1,
	VIPS_INTERPRETATION_HISTOGRAM = 10,
	VIPS_INTERPRETATION_FOURIER = 24,
	VIPS_INTERPRETATION_XYZ = 12,
	VIPS_INTERPRETATION_LAB = 13,
	VIPS_INTERPRETATION_CMYK = 15,
	VIPS_INTERPRETATION_LABQ = 16,
	VIPS_INTERPRETATION_RGB = 17,
	VIPS_INTERPRETATION_UCS = 18,
	VIPS_INTERPRETATION_LCH = 19,
	VIPS_INTERPRETATION_LABS = 21,
	VIPS_INTERPRETATION_sRGB = 22,
	VIPS_INTERPRETATION_YXY = 23,
	VIPS_INTERPRETATION_RGB16 = 25,
	VIPS_INTERPRETATION_GREY16 = 26
} VipsInterpretation;
</pre>
<p>
How the values in an image should be interpreted. For example, a
three-band float image of type <span class="type">VIPS_TYPE_LAB</span> should have its pixels
interpreted as coordinates in CIE Lab space.
</p>
<p>
These values are set by operations as hints to user-interfaces built on top 
of VIPS to help them show images to the user in a meaningful way. 
Operations do not use these values to decide their action.
</p>
<p>
The gaps in the numbering are historical and must be maintained. Allocate 
new numbers from the end.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><a name="VIPS-INTERPRETATION-MULTIBAND:CAPS"></a><span class="term"><code class="literal">VIPS_INTERPRETATION_MULTIBAND</code></span></p></td>
<td></td>
</tr>
<tr>
<td><p><a name="VIPS-INTERPRETATION-B-W:CAPS"></a><span class="term"><code class="literal">VIPS_INTERPRETATION_B_W</code></span></p></td>
<td></td>
</tr>
<tr>
<td><p><a name="VIPS-INTERPRETATION-HISTOGRAM:CAPS"></a><span class="term"><code class="literal">VIPS_INTERPRETATION_HISTOGRAM</code></span></p></td>
<td></td>
</tr>
<tr>
<td><p><a name="VIPS-INTERPRETATION-FOURIER:CAPS"></a><span class="term"><code class="literal">VIPS_INTERPRETATION_FOURIER</code></span></p></td>
<td></td>
</tr>
<tr>
<td><p><a name="VIPS-INTERPRETATION-XYZ:CAPS"></a><span class="term"><code class="literal">VIPS_INTERPRETATION_XYZ</code></span></p></td>
<td></td>
</tr>
<tr>
<td><p><a name="VIPS-INTERPRETATION-LAB:CAPS"></a><span class="term"><code class="literal">VIPS_INTERPRETATION_LAB</code></span></p></td>
<td></td>
</tr>
<tr>
<td><p><a name="VIPS-INTERPRETATION-CMYK:CAPS"></a><span class="term"><code class="literal">VIPS_INTERPRETATION_CMYK</code></span></p></td>
<td></td>
</tr>
<tr>
<td><p><a name="VIPS-INTERPRETATION-LABQ:CAPS"></a><span class="term"><code class="literal">VIPS_INTERPRETATION_LABQ</code></span></p></td>
<td></td>
</tr>
<tr>
<td><p><a name="VIPS-INTERPRETATION-RGB:CAPS"></a><span class="term"><code class="literal">VIPS_INTERPRETATION_RGB</code></span></p></td>
<td></td>
</tr>
<tr>
<td><p><a name="VIPS-INTERPRETATION-UCS:CAPS"></a><span class="term"><code class="literal">VIPS_INTERPRETATION_UCS</code></span></p></td>
<td></td>
</tr>
<tr>
<td><p><a name="VIPS-INTERPRETATION-LCH:CAPS"></a><span class="term"><code class="literal">VIPS_INTERPRETATION_LCH</code></span></p></td>
<td></td>
</tr>
<tr>
<td><p><a name="VIPS-INTERPRETATION-LABS:CAPS"></a><span class="term"><code class="literal">VIPS_INTERPRETATION_LABS</code></span></p></td>
<td></td>
</tr>
<tr>
<td><p><a name="VIPS-INTERPRETATION-sRGB"></a><span class="term"><code class="literal">VIPS_INTERPRETATION_sRGB</code></span></p></td>
<td></td>
</tr>
<tr>
<td><p><a name="VIPS-INTERPRETATION-YXY:CAPS"></a><span class="term"><code class="literal">VIPS_INTERPRETATION_YXY</code></span></p></td>
<td></td>
</tr>
<tr>
<td><p><a name="VIPS-INTERPRETATION-RGB16:CAPS"></a><span class="term"><code class="literal">VIPS_INTERPRETATION_RGB16</code></span></p></td>
<td></td>
</tr>
<tr>
<td><p><a name="VIPS-INTERPRETATION-GREY16:CAPS"></a><span class="term"><code class="literal">VIPS_INTERPRETATION_GREY16</code></span></p></td>
<td></td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="VipsBandFormat"></a><h3>enum VipsBandFormat</h3>
<pre class="programlisting">typedef enum {
	VIPS_FORMAT_NOTSET = -1,
	VIPS_FORMAT_UCHAR = 0,
	VIPS_FORMAT_CHAR = 1,
	VIPS_FORMAT_USHORT = 2,
	VIPS_FORMAT_SHORT = 3,
	VIPS_FORMAT_UINT = 4,
	VIPS_FORMAT_INT = 5,
	VIPS_FORMAT_FLOAT = 6,
	VIPS_FORMAT_COMPLEX = 7,
	VIPS_FORMAT_DOUBLE = 8,
	VIPS_FORMAT_DPCOMPLEX = 9,
	VIPS_FORMAT_LAST = 10
} VipsBandFormat;
</pre>
<p>
The format used for each band element. 
</p>
<p>
Each corresponnds to a native C type for the current machine. For example,
<a class="link" href="VipsImage.html#VIPS-FORMAT-USHORT:CAPS"><span class="type">VIPS_FORMAT_USHORT</span></a> is <span class="type">unsigned short</span>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><a name="VIPS-FORMAT-NOTSET:CAPS"></a><span class="term"><code class="literal">VIPS_FORMAT_NOTSET</code></span></p></td>
<td>invalid setting
</td>
</tr>
<tr>
<td><p><a name="VIPS-FORMAT-UCHAR:CAPS"></a><span class="term"><code class="literal">VIPS_FORMAT_UCHAR</code></span></p></td>
<td>unsigned char format
</td>
</tr>
<tr>
<td><p><a name="VIPS-FORMAT-CHAR:CAPS"></a><span class="term"><code class="literal">VIPS_FORMAT_CHAR</code></span></p></td>
<td>char format
</td>
</tr>
<tr>
<td><p><a name="VIPS-FORMAT-USHORT:CAPS"></a><span class="term"><code class="literal">VIPS_FORMAT_USHORT</code></span></p></td>
<td>unsigned short format
</td>
</tr>
<tr>
<td><p><a name="VIPS-FORMAT-SHORT:CAPS"></a><span class="term"><code class="literal">VIPS_FORMAT_SHORT</code></span></p></td>
<td>short format
</td>
</tr>
<tr>
<td><p><a name="VIPS-FORMAT-UINT:CAPS"></a><span class="term"><code class="literal">VIPS_FORMAT_UINT</code></span></p></td>
<td>unsigned int format
</td>
</tr>
<tr>
<td><p><a name="VIPS-FORMAT-INT:CAPS"></a><span class="term"><code class="literal">VIPS_FORMAT_INT</code></span></p></td>
<td>int format
</td>
</tr>
<tr>
<td><p><a name="VIPS-FORMAT-FLOAT:CAPS"></a><span class="term"><code class="literal">VIPS_FORMAT_FLOAT</code></span></p></td>
<td>float format
</td>
</tr>
<tr>
<td><p><a name="VIPS-FORMAT-COMPLEX:CAPS"></a><span class="term"><code class="literal">VIPS_FORMAT_COMPLEX</code></span></p></td>
<td>complex (two floats) format
</td>
</tr>
<tr>
<td><p><a name="VIPS-FORMAT-DOUBLE:CAPS"></a><span class="term"><code class="literal">VIPS_FORMAT_DOUBLE</code></span></p></td>
<td>double float format
</td>
</tr>
<tr>
<td><p><a name="VIPS-FORMAT-DPCOMPLEX:CAPS"></a><span class="term"><code class="literal">VIPS_FORMAT_DPCOMPLEX</code></span></p></td>
<td>double complex (two double) format
</td>
</tr>
<tr>
<td><p><a name="VIPS-FORMAT-LAST:CAPS"></a><span class="term"><code class="literal">VIPS_FORMAT_LAST</code></span></p></td>
<td></td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="VipsCoding"></a><h3>enum VipsCoding</h3>
<pre class="programlisting">typedef enum {
	VIPS_CODING_NONE = 0,
	VIPS_CODING_LABQ = 2,
	VIPS_CODING_RAD = 6
} VipsCoding;
</pre>
<p>
How pixels are coded. 
</p>
<p>
Normally, pixels are uncoded and can be manipulated as you would expect.
However some file formats code pixels for compression, and sometimes it's
useful to be able to manipulate images in the coded format.
</p>
<p>
The gaps in the numbering are historical and must be maintained. Allocate 
new numbers from the end.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><a name="VIPS-CODING-NONE:CAPS"></a><span class="term"><code class="literal">VIPS_CODING_NONE</code></span></p></td>
<td>pixels are not coded
</td>
</tr>
<tr>
<td><p><a name="VIPS-CODING-LABQ:CAPS"></a><span class="term"><code class="literal">VIPS_CODING_LABQ</code></span></p></td>
<td>pixels encode 3 float CIELAB values as 4 uchar
</td>
</tr>
<tr>
<td><p><a name="VIPS-CODING-RAD:CAPS"></a><span class="term"><code class="literal">VIPS_CODING_RAD</code></span></p></td>
<td>pixels encode 3 float RGB as 4 uchar (Radiance coding)
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="VipsProgress"></a><h3>VipsProgress</h3>
<pre class="programlisting">typedef struct {
	int run;		/* Time we have been running */
	int eta;		/* Estimated seconds of computation left */
	gint64 tpels;		/* Number of pels we expect to calculate */
	gint64 npels;		/* Number of pels calculated so far */
	int percent;		/* Percent complete */
	GTimer *start;		/* Start time */
} VipsProgress;
</pre>
<p>
A structure available to eval callbacks giving information on evaluation
progress. See <a class="link" href="VipsImage.html#VipsImage-eval" title='The "eval" signal'><span class="type">"eval"</span></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><span class="type">int</span> <em class="structfield"><code><a name="VipsProgress.run"></a>run</code></em>;</span></p></td>
<td>Time we have been running</td>
</tr>
<tr>
<td><p><span class="term"><span class="type">int</span> <em class="structfield"><code><a name="VipsProgress.eta"></a>eta</code></em>;</span></p></td>
<td>Estimated seconds of computation left</td>
</tr>
<tr>
<td><p><span class="term"><span class="type">gint64</span> <em class="structfield"><code><a name="VipsProgress.tpels"></a>tpels</code></em>;</span></p></td>
<td>Number of pels we expect to calculate</td>
</tr>
<tr>
<td><p><span class="term"><span class="type">gint64</span> <em class="structfield"><code><a name="VipsProgress.npels"></a>npels</code></em>;</span></p></td>
<td>Number of pels calculated so far</td>
</tr>
<tr>
<td><p><span class="term"><span class="type">int</span> <em class="structfield"><code><a name="VipsProgress.percent"></a>percent</code></em>;</span></p></td>
<td>Percent complete</td>
</tr>
<tr>
<td><p><span class="term"><span class="type">GTimer</span> *<em class="structfield"><code><a name="VipsProgress.start"></a>start</code></em>;</span></p></td>
<td>Start time</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="VipsImage-struct"></a><h3>VipsImage</h3>
<pre class="programlisting">typedef struct _VipsImage VipsImage;</pre>
<p>
An image. These can represent an image on disc, a memory buffer, an image
in the process of being written to disc or a partially evaluated image
in memory.
</p>
</div>
<hr>
<div class="refsect2">
<a name="VipsImageClass"></a><h3>VipsImageClass</h3>
<pre class="programlisting">typedef struct {
	VipsObjectClass parent_class;

	/* Signals we emit.
	 */

	/* Evaluation is starting.
	 */
	void (*preeval)( VipsImage *image, VipsProgress *progress );

	/* Evaluation progress.
	 */
	void (*eval)( VipsImage *image, VipsProgress *progress );

	/* Evaluation is ending.
	 */
	void (*posteval)( VipsImage *image, VipsProgress *progress );

	/* An image has been written to. 
	 * Used by eg. vips_image_new_mode("x.jpg", "w") to do the 
	 * final write to jpeg.
	 * Set *result to non-zero to indicate an error on write.
	 */
	void (*written)( VipsImage *image, int *result );

	/* An image has been modified in some way and all caches 
	 * need dropping. 
	 */
	void (*invalidate)( VipsImage *image );
} VipsImageClass;
</pre>
</div>
<hr>
<div class="refsect2">
<a name="VIPS-IMAGE-SIZEOF-ELEMENT:CAPS"></a><h3>VIPS_IMAGE_SIZEOF_ELEMENT()</h3>
<pre class="programlisting">#define             VIPS_IMAGE_SIZEOF_ELEMENT( I )</pre>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>I</code></em> :</span></p></td>
<td>a <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<code class="function">sizeof()</code> a band element.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="VIPS-IMAGE-SIZEOF-PEL:CAPS"></a><h3>VIPS_IMAGE_SIZEOF_PEL()</h3>
<pre class="programlisting">#define             VIPS_IMAGE_SIZEOF_PEL( I )</pre>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>I</code></em> :</span></p></td>
<td>a <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<code class="function">sizeof()</code> a pixel.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="VIPS-IMAGE-SIZEOF-LINE:CAPS"></a><h3>VIPS_IMAGE_SIZEOF_LINE()</h3>
<pre class="programlisting">#define             VIPS_IMAGE_SIZEOF_LINE( I )</pre>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>I</code></em> :</span></p></td>
<td>a <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<code class="function">sizeof()</code> a scanline of pixels.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="VIPS-IMAGE-SIZEOF-IMAGE:CAPS"></a><h3>VIPS_IMAGE_SIZEOF_IMAGE()</h3>
<pre class="programlisting">#define             VIPS_IMAGE_SIZEOF_IMAGE( I )</pre>
</div>
<hr>
<div class="refsect2">
<a name="VIPS-IMAGE-N-ELEMENTS:CAPS"></a><h3>VIPS_IMAGE_N_ELEMENTS()</h3>
<pre class="programlisting">#define             VIPS_IMAGE_N_ELEMENTS( I )</pre>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>I</code></em> :</span></p></td>
<td>a <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The number of band elements in a scanline.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="VIPS-IMAGE-ADDR:CAPS"></a><h3>VIPS_IMAGE_ADDR()</h3>
<pre class="programlisting">#define             VIPS_IMAGE_ADDR( I, X, Y )</pre>
<p>
This macro returns a pointer to a pixel in an image. It only works for
images which are fully available in memory, so memory buffers and small
mapped images only.
</p>
<p>
If VIPS_DEBUG is defined, you get a version that checks bounds for you.
</p>
<p>
See also: <a class="link" href="VipsRegion.html#VIPS-REGION-ADDR:CAPS" title="VIPS_REGION_ADDR()"><code class="function">VIPS_REGION_ADDR()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>I</code></em> :</span></p></td>
<td>a <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>X</code></em> :</span></p></td>
<td>x coordinate</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>Y</code></em> :</span></p></td>
<td>y coordinate</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The address of pixel (x,y) in the image.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-written"></a><h3>vips_image_written ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span>                 vips_image_written                  (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>);</pre>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-invalidate-all"></a><h3>vips_image_invalidate_all ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                vips_image_invalidate_all           (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>);</pre>
<p>
Invalidate all pixel caches on an <em class="parameter"><code>image</code></em> and any derived images. The 
"invalidate" callback is triggered for all invalidated images.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>image</code></em> :</span></p></td>
<td>
<a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> to invalidate</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-preeval"></a><h3>vips_image_preeval ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                vips_image_preeval                  (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>);</pre>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-eval"></a><h3>vips_image_eval ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                vips_image_eval                     (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> w</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> h</code></em>);</pre>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-posteval"></a><h3>vips_image_posteval ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                vips_image_posteval                 (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>);</pre>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-set-progress"></a><h3>vips_image_set_progress ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                vips_image_set_progress             (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>,
                                                         <em class="parameter"><code><span class="type">gboolean</span> progress</code></em>);</pre>
<p>
vips signals evaluation progress via the "preeval", "eval" and "posteval"
signals. Progress is signalled on the most-downstream image for which
<a class="link" href="VipsImage.html#vips-image-set-progress" title="vips_image_set_progress ()"><code class="function">vips_image_set_progress()</code></a> was called.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>image</code></em> :</span></p></td>
<td>image to signal progress on</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>progress</code></em> :</span></p></td>
<td>turn progress reporting on or off</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-get-kill"></a><h3>vips_image_get_kill ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>            vips_image_get_kill                 (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>);</pre>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-set-kill"></a><h3>vips_image_set_kill ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                vips_image_set_kill                 (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>,
                                                         <em class="parameter"><code><span class="type">gboolean</span> kill</code></em>);</pre>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-new"></a><h3>vips_image_new ()</h3>
<pre class="programlisting"><a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *         vips_image_new                      (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>
<a class="link" href="VipsImage.html#vips-image-new" title="vips_image_new ()"><code class="function">vips_image_new()</code></a> creates a "glue" descriptor you can use to join two image 
processing operations together. 
</p>
<p>
It is the equivalent of vips_image_new_mode("xxx", "p").
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the new <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a>, or <code class="literal">NULL</code> on error.</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-new-array"></a><h3>vips_image_new_array ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span>                 vips_image_new_array                (<em class="parameter"><code><a class="link" href="libvips-VipsArgument.html#VipsObject"><span class="type">VipsObject</span></a> *parent</code></em>,
                                                         <em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> **images</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> n</code></em>);</pre>
<p>
Just like <a class="link" href="VipsImage.html#vips-image-new" title="vips_image_new ()"><code class="function">vips_image_new()</code></a>, but opens an array of "p" images. 
Handy for creating a 
set of temporary images for a function.
</p>
<p>
Example:
</p>
<p>
</p>
<div class="informalexample"><pre class="programlisting">
VipsImage *t[5];

if( vips_image_new_array( out, t, 5 ) ||
  vips_add( a, b, t[0] ) ||
  vips_invert( t[0], t[1] ) ||
  vips_add( t[1], t[0], t[2] ) ||
  vips_costra( t[2], out ) )
  return( -1 );
</pre></div>
<p>
</p>
<p>
See also: <a class="link" href="VipsImage.html#vips-image-new" title="vips_image_new ()"><code class="function">vips_image_new()</code></a>, <a class="link" href="libvips-VipsArgument.html#vips-object-local" title="vips_object_local()"><code class="function">vips_object_local()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>parent</code></em> :</span></p></td>
<td>images unref when this object unrefs</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>OUT</code></em> :</span></p></td>
<td>array to fill with <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>N</code></em> :</span></p></td>
<td>array size</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>0 on sucess, or -1 on error</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-new-mode"></a><h3>vips_image_new_mode ()</h3>
<pre class="programlisting"><a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *         vips_image_new_mode                 (<em class="parameter"><code>const <span class="type">char</span> *filename</code></em>,
                                                         <em class="parameter"><code>const <span class="type">char</span> *mode</code></em>);</pre>
<p>
<a class="link" href="VipsImage.html#vips-image-new-mode" title="vips_image_new_mode ()"><code class="function">vips_image_new_mode()</code></a> examines the mode string and creates an 
appropriate <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a>.
</p>
<p>
</p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem"><p>
      <span class="emphasis"><em>"t"</em></span>
      creates a temporary memory buffer image.
    </p></li>
<li class="listitem"><p>
      <span class="emphasis"><em>"p"</em></span>
      creates a "glue" descriptor you can use to join operations, see also
      <a class="link" href="VipsImage.html#vips-image-new" title="vips_image_new ()"><code class="function">vips_image_new()</code></a>.
    </p></li>
<li class="listitem">
<p>
      <span class="emphasis"><em>"r"</em></span>
      opens the named file for reading. If the file is not in the native 
      VIPS format for your machine, <a class="link" href="VipsImage.html#vips-image-new-mode" title="vips_image_new_mode ()"><code class="function">vips_image_new_mode()</code></a> 
      automatically converts the file for you in memory. 
</p>
<p>
      For some large files (eg. TIFF) this may 
      not be what you want, it can fill memory very quickly. Instead, you
      can either use "rd" mode (see below), or you can use the lower-level 
      API and control the loading process yourself. See 
      <a class="link" href="VipsImage.html#VipsBandFormat"><span class="type">VipsBandFormat</span></a>. 
</p>
<p>
      <a class="link" href="VipsImage.html#vips-image-new-mode" title="vips_image_new_mode ()"><code class="function">vips_image_new_mode()</code></a> can read files in most formats.
</p>
<p>
      Note that <span class="emphasis"><em>"r"</em></span> mode works in at least two stages. 
      It should return quickly and let you check header fields. It will
      only actually read in pixels when you first access them. 
    </p>
</li>
<li class="listitem">
<p>
      <span class="emphasis"><em>"rd"</em></span>
 opens the named file for reading. If the uncompressed image is larger 
 than a threshold and the file format does not support random access, 
 rather than uncompressing to memory, <a class="link" href="VipsImage.html#vips-image-new-mode" title="vips_image_new_mode ()"><code class="function">vips_image_new_mode()</code></a> will 
 uncompress to a temporary disc file. This file will be automatically 
 deleted when the IMAGE is closed.
</p>
<p>
 See <a class="link" href="libvips-conversion.html#im-system-image" title="im_system_image ()"><code class="function">im_system_image()</code></a> for an explanation of how VIPS selects a
 location for the temporary file.
</p>
<p>
 The disc threshold can be set with the "--vips-disc-threshold"
 command-line argument, or the IM_DISC_THRESHOLD environment variable.
 The value is a simple integer, but can take a unit postfix of "k", 
 "m" or "g" to indicate kilobytes, megabytes or gigabytes.
</p>
<p>
 For example:
</p>
<p>
      </p>
<div class="informalexample"><pre class="programlisting">
        vips --vips-disc-threshold "500m" im_copy fred.tif fred.v
      </pre></div>
<p>
</p>
<p>
      will copy via disc if "fred.tif" is more than 500 Mbytes
      uncompressed. The default threshold is 100MB.
    </p>
</li>
<li class="listitem">
<p>
      <span class="emphasis"><em>"w"</em></span>
      opens the named file for writing. It looks at the file name 
      suffix to determine the type to write -- for example:
</p>
<p>
      </p>
<div class="informalexample"><pre class="programlisting">
        vips_image_new_mode( "fred.tif", "w" )
      </pre></div>
<p>
</p>
<p>
      will write in TIFF format.
    </p>
</li>
<li class="listitem"><p>
      <span class="emphasis"><em>"rw"</em></span>
      opens the named file for reading and writing. This will only work for 
      VIPS files in a format native to your machine. It is only for 
      paintbox-type applications.
    </p></li>
</ul></div>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>filename</code></em> :</span></p></td>
<td>file to open</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>mode</code></em> :</span></p></td>
<td>mode to open with</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the new <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a>, or <code class="literal">NULL</code> on error.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-new-from-file"></a><h3>vips_image_new_from_file ()</h3>
<pre class="programlisting"><a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *         vips_image_new_from_file            (<em class="parameter"><code>const <span class="type">char</span> *filename</code></em>);</pre>
<p>
<a class="link" href="VipsImage.html#vips-image-new-from-file" title="vips_image_new_from_file ()"><code class="function">vips_image_new_from_file()</code></a> opens <em class="parameter"><code>filename</code></em> for reading. See
<a class="link" href="VipsImage.html#vips-image-new-mode" title="vips_image_new_mode ()"><code class="function">vips_image_new_mode()</code></a> for details.
</p>
<p>
See also: <a class="link" href="VipsImage.html#vips-image-new-mode" title="vips_image_new_mode ()"><code class="function">vips_image_new_mode()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>filename</code></em> :</span></p></td>
<td>file to open</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the new <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a>, or <code class="literal">NULL</code> on error.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-new-from-file-raw"></a><h3>vips_image_new_from_file_raw ()</h3>
<pre class="programlisting"><a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *         vips_image_new_from_file_raw        (<em class="parameter"><code>const <span class="type">char</span> *filename</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> xsize</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> ysize</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> bands</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> offset</code></em>);</pre>
<p>
This function maps the named file and returns a <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> you can use to
read it.
</p>
<p>
It returns an 8-bit image with <em class="parameter"><code>bands</code></em> bands. If the image is not 8-bit, use 
<a class="link" href="libvips-conversion.html#im-copy-set" title="im_copy_set ()"><code class="function">im_copy_set()</code></a> to transform the descriptor after loading it.
</p>
<p>
See also: <a class="link" href="libvips-conversion.html#im-copy-set" title="im_copy_set ()"><code class="function">im_copy_set()</code></a>, <a class="link" href="VipsFormat.html#im-raw2vips" title="im_raw2vips ()"><code class="function">im_raw2vips()</code></a>, <a class="link" href="VipsImage.html#vips-image-new-from-file" title="vips_image_new_from_file ()"><code class="function">vips_image_new_from_file()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>filename</code></em> :</span></p></td>
<td>filename to open</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>xsize</code></em> :</span></p></td>
<td>image width</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>ysize</code></em> :</span></p></td>
<td>image height</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>bands</code></em> :</span></p></td>
<td>image bands (or bytes per pixel)</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>offset</code></em> :</span></p></td>
<td>bytes to skip at start of file</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the new <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a>, or <code class="literal">NULL</code> on error.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-new-from-memory"></a><h3>vips_image_new_from_memory ()</h3>
<pre class="programlisting"><a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *         vips_image_new_from_memory          (<em class="parameter"><code><span class="type">void</span> *buffer</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> xsize</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> ysize</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> bands</code></em>,
                                                         <em class="parameter"><code><a class="link" href="VipsImage.html#VipsBandFormat"><span class="type">VipsBandFormat</span></a> bandfmt</code></em>);</pre>
<p>
This function wraps an <span class="type">IMAGE</span> around a memory buffer. VIPS does not take
responsibility for the area of memory, it's up to you to make sure it's
freed when the image is closed. See for example <a class="link" href="libvips-VipsArgument.html#VipsObject-close" title='The "close" signal'><span class="type">"close"</span></a>.
</p>
<p>
See also: <code class="function">im_binfile()</code>, <a class="link" href="VipsFormat.html#im-raw2vips" title="im_raw2vips ()"><code class="function">im_raw2vips()</code></a>, <a class="link" href="VipsImage.html#vips-image-new" title="vips_image_new ()"><code class="function">vips_image_new()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>buffer</code></em> :</span></p></td>
<td>start of memory area</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>xsize</code></em> :</span></p></td>
<td>image width</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>ysize</code></em> :</span></p></td>
<td>image height</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>bands</code></em> :</span></p></td>
<td>image bands (or bytes per pixel)</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>bandfmt</code></em> :</span></p></td>
<td>image format</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the new <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a>, or <code class="literal">NULL</code> on error.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-set-delete-on-close"></a><h3>vips_image_set_delete_on_close ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                vips_image_set_delete_on_close      (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>,
                                                         <em class="parameter"><code><span class="type">gboolean</span> delete_on_close</code></em>);</pre>
<p>
Sets the delete_on_close flag for the image. If this flag is set, when
<em class="parameter"><code>image</code></em> is finalized the filename held in <em class="parameter"><code>image-&gt;filename</code></em> at the time of
this call is unlinked.
</p>
<p>
This function is clearly extremely dangerous, use with great caution.
</p>
<p>
See also: <a class="link" href="libvips-util.html#vips--temp-name" title="vips__temp_name ()"><code class="function">vips__temp_name()</code></a>, <a class="link" href="VipsImage.html#vips-image-new-disc-temp" title="vips_image_new_disc_temp ()"><code class="function">vips_image_new_disc_temp()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>image</code></em> :</span></p></td>
<td>image to set</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>delete_on_close</code></em> :</span></p></td>
<td>format of file</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-new-disc-temp"></a><h3>vips_image_new_disc_temp ()</h3>
<pre class="programlisting"><a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *         vips_image_new_disc_temp            (<em class="parameter"><code>const <span class="type">char</span> *format</code></em>);</pre>
<p>
Make a "w" disc <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> which will be automatically unlinked when it is
destroyed. <em class="parameter"><code>format</code></em> is something like "<code class="literal">s</code>.v" for a vips file.
</p>
<p>
The file is created in the temporary directory, see <a class="link" href="libvips-util.html#vips--temp-name" title="vips__temp_name ()"><code class="function">vips__temp_name()</code></a>.
</p>
<p>
See also: <a class="link" href="libvips-util.html#vips--temp-name" title="vips__temp_name ()"><code class="function">vips__temp_name()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>format</code></em> :</span></p></td>
<td>format of file</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the new <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a>, or <code class="literal">NULL</code> on error.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-write"></a><h3>vips_image_write ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span>                 vips_image_write                    (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>,
                                                         <em class="parameter"><code>const <span class="type">char</span> *filename</code></em>);</pre>
<p>
A convenience function to write a <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> to a file.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>image</code></em> :</span></p></td>
<td>image to write</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>filename</code></em> :</span></p></td>
<td>write to this file</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>0 on success, or -1 on error.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-isMSBfirst"></a><h3>vips_image_isMSBfirst ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>            vips_image_isMSBfirst               (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>);</pre>
<p>
Return <code class="literal">TRUE</code> if <em class="parameter"><code>image</code></em> is in most-significant-
byte first form. This is the byte order used on the SPARC
architecture and others.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>image</code></em> :</span></p></td>
<td>image to test</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-isfile"></a><h3>vips_image_isfile ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>            vips_image_isfile                   (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>);</pre>
<p>
Return <code class="literal">TRUE</code> if <em class="parameter"><code>image</code></em> represents a file on disc in some way.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>image</code></em> :</span></p></td>
<td>image to test</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-ispartial"></a><h3>vips_image_ispartial ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>            vips_image_ispartial                (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>);</pre>
<p>
Return <code class="literal">TRUE</code> if <em class="parameter"><code>im</code></em> represents a partial image (a delayed calculation).
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>image</code></em> :</span></p></td>
<td>image to test</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-write-line"></a><h3>vips_image_write_line ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span>                 vips_image_write_line               (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> ypos</code></em>,
                                                         <em class="parameter"><code><span class="type">PEL</span> *linebuffer</code></em>);</pre>
<p>
Write a line of pixels to an image. This function must be called repeatedly
with <em class="parameter"><code>ypos</code></em> increasing from 0 to <em class="parameter"><code>YSize</code></em> -
<em class="parameter"><code>linebuffer</code></em> must be <a class="link" href="VipsImage.html#VIPS-IMAGE-SIZEOF-LINE:CAPS" title="VIPS_IMAGE_SIZEOF_LINE()"><code class="function">VIPS_IMAGE_SIZEOF_LINE()</code></a> bytes long.
</p>
<p>
See also: <a class="link" href="libvips-generate.html#vips-image-generate" title="vips_image_generate ()"><code class="function">vips_image_generate()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>image</code></em> :</span></p></td>
<td>image to write to</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>ypos</code></em> :</span></p></td>
<td>vertical position of scan-line to write</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>linebuffer</code></em> :</span></p></td>
<td>scanline of pixels</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>0 on success, or -1 on error.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-wio-input"></a><h3>vips_image_wio_input ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span>                 vips_image_wio_input                (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>);</pre>
<p>
Check that an image is readable via the <a class="link" href="VipsImage.html#VIPS-IMAGE-ADDR:CAPS" title="VIPS_IMAGE_ADDR()"><code class="function">VIPS_IMAGE_ADDR()</code></a> macro, that is,
that the entire image is in memory and all pixels can be read with 
<a class="link" href="VipsImage.html#VIPS-IMAGE-ADDR:CAPS" title="VIPS_IMAGE_ADDR()"><code class="function">VIPS_IMAGE_ADDR()</code></a>.
</p>
<p>
If it 
isn't, try to transform it so that <a class="link" href="VipsImage.html#VIPS-IMAGE-ADDR:CAPS" title="VIPS_IMAGE_ADDR()"><code class="function">VIPS_IMAGE_ADDR()</code></a> can work. 
</p>
<p>
See also: <a class="link" href="VipsImage.html#vips-image-wio-output" title="vips_image_wio_output ()"><code class="function">vips_image_wio_output()</code></a>, <a class="link" href="VipsImage.html#vips-image-pio-input" title="vips_image_pio_input ()"><code class="function">vips_image_pio_input()</code></a>, 
<a class="link" href="VipsImage.html#vips-image-inplace" title="vips_image_inplace ()"><code class="function">vips_image_inplace()</code></a>, <a class="link" href="VipsImage.html#VIPS-IMAGE-ADDR:CAPS" title="VIPS_IMAGE_ADDR()"><code class="function">VIPS_IMAGE_ADDR()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>image</code></em> :</span></p></td>
<td>image to transform</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>0 on succeess, or -1 on error.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-wio-output"></a><h3>vips_image_wio_output ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span>                 vips_image_wio_output               (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>);</pre>
<p>
Check that an image is writeable by <a class="link" href="VipsImage.html#vips-image-write-line" title="vips_image_write_line ()"><code class="function">vips_image_write_line()</code></a>. If it isn't,
try to transform it so that <a class="link" href="VipsImage.html#vips-image-write-line" title="vips_image_write_line ()"><code class="function">vips_image_write_line()</code></a> can work.
</p>
<p>
See also: <a class="link" href="VipsImage.html#vips-image-wio-input" title="vips_image_wio_input ()"><code class="function">vips_image_wio_input()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>image</code></em> :</span></p></td>
<td>image to check</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>0 on succeess, or -1 on error.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-inplace"></a><h3>vips_image_inplace ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span>                 vips_image_inplace                  (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>);</pre>
<p>
Gets <em class="parameter"><code>image</code></em> ready for an in-place operation, such as <code class="function">im_insertplace()</code>.
Operations like this both read and write with <a class="link" href="VipsImage.html#VIPS-IMAGE-ADDR:CAPS" title="VIPS_IMAGE_ADDR()"><code class="function">VIPS_IMAGE_ADDR()</code></a>.
</p>
<p>
See also: <code class="function">im_insertplace()</code>, <a class="link" href="VipsImage.html#vips-image-wio-input" title="vips_image_wio_input ()"><code class="function">vips_image_wio_input()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>image</code></em> :</span></p></td>
<td>image to make read-write</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>0 on succeess, or -1 on error.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-pio-input"></a><h3>vips_image_pio_input ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span>                 vips_image_pio_input                (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>);</pre>
<p>
Check that an image is readable with <a class="link" href="VipsRegion.html#vips-region-prepare" title="vips_region_prepare ()"><code class="function">vips_region_prepare()</code></a> and friends. 
If it isn't, try to transform the image so that <a class="link" href="VipsRegion.html#vips-region-prepare" title="vips_region_prepare ()"><code class="function">vips_region_prepare()</code></a> can 
work.
</p>
<p>
See also: <a class="link" href="VipsImage.html#vips-image-pio-output" title="vips_image_pio_output ()"><code class="function">vips_image_pio_output()</code></a>, <a class="link" href="VipsRegion.html#vips-region-prepare" title="vips_region_prepare ()"><code class="function">vips_region_prepare()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>image</code></em> :</span></p></td>
<td>image to check</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>0 on succeess, or -1 on error.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-pio-output"></a><h3>vips_image_pio_output ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span>                 vips_image_pio_output               (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>);</pre>
<p>
Check that an image is writeable with <a class="link" href="libvips-generate.html#vips-image-generate" title="vips_image_generate ()"><code class="function">vips_image_generate()</code></a>. If it isn't,
try to transform the image so that <a class="link" href="libvips-generate.html#vips-image-generate" title="vips_image_generate ()"><code class="function">vips_image_generate()</code></a> can work.
</p>
<p>
See also: <a class="link" href="VipsImage.html#vips-image-pio-input" title="vips_image_pio_input ()"><code class="function">vips_image_pio_input()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>image</code></em> :</span></p></td>
<td>image to check</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>0 on succeess, or -1 on error.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="vips-band-format-isint"></a><h3>vips_band_format_isint ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>            vips_band_format_isint              (<em class="parameter"><code><a class="link" href="VipsImage.html#VipsBandFormat"><span class="type">VipsBandFormat</span></a> format</code></em>);</pre>
<p>
Return <code class="literal">TRUE</code> if <em class="parameter"><code>format</code></em> is one of the integer types.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>format</code></em> :</span></p></td>
<td>format to test</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="vips-band-format-isuint"></a><h3>vips_band_format_isuint ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>            vips_band_format_isuint             (<em class="parameter"><code><a class="link" href="VipsImage.html#VipsBandFormat"><span class="type">VipsBandFormat</span></a> format</code></em>);</pre>
<p>
Return <code class="literal">TRUE</code> if <em class="parameter"><code>format</code></em> is one of the unsigned integer types.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>format</code></em> :</span></p></td>
<td>format to test</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="vips-band-format-isfloat"></a><h3>vips_band_format_isfloat ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>            vips_band_format_isfloat            (<em class="parameter"><code><a class="link" href="VipsImage.html#VipsBandFormat"><span class="type">VipsBandFormat</span></a> format</code></em>);</pre>
<p>
Return <code class="literal">TRUE</code> if <em class="parameter"><code>format</code></em> is one of the float types.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>format</code></em> :</span></p></td>
<td>format to test</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="vips-band-format-iscomplex"></a><h3>vips_band_format_iscomplex ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>            vips_band_format_iscomplex          (<em class="parameter"><code><a class="link" href="VipsImage.html#VipsBandFormat"><span class="type">VipsBandFormat</span></a> format</code></em>);</pre>
<p>
Return <code class="literal">TRUE</code> if <em class="parameter"><code>fmt</code></em> is one of the complex types.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>format</code></em> :</span></p></td>
<td>format to test</td>
</tr></tbody>
</table></div>
</div>
</div>
<div class="refsect1">
<a name="VipsImage.property-details"></a><h2>Property Details</h2>
<div class="refsect2">
<a name="VipsImage--bands"></a><h3>The <code class="literal">"bands"</code> property</h3>
<pre class="programlisting">  "bands"                    <span class="type">gint</span>                  : Read / Write</pre>
<p>Number of bands in image.</p>
<p>Allowed values: [0,1000000]</p>
<p>Default value: 0</p>
</div>
<hr>
<div class="refsect2">
<a name="VipsImage--demand"></a><h3>The <code class="literal">"demand"</code> property</h3>
<pre class="programlisting">  "demand"                   <a class="link" href="VipsImage.html#VipsDemandStyle"><span class="type">VipsDemandStyle</span></a>       : Read / Write</pre>
<p>Preferred demand style for this image.</p>
<p>Default value: VIPS_DEMAND_STYLE_SMALLTILE</p>
</div>
<hr>
<div class="refsect2">
<a name="VipsImage--filename"></a><h3>The <code class="literal">"filename"</code> property</h3>
<pre class="programlisting">  "filename"                 <span class="type">gchar</span>*                : Read / Write</pre>
<p>Image filename.</p>
<p>Default value: NULL</p>
</div>
<hr>
<div class="refsect2">
<a name="VipsImage--foreign-buffer"></a><h3>The <code class="literal">"foreign-buffer"</code> property</h3>
<pre class="programlisting">  "foreign-buffer"           <span class="type">gpointer</span>              : Read / Write</pre>
<p>Pointer to foreign pixels.</p>
</div>
<hr>
<div class="refsect2">
<a name="VipsImage--format"></a><h3>The <code class="literal">"format"</code> property</h3>
<pre class="programlisting">  "format"                   <a class="link" href="VipsImage.html#VipsBandFormat"><span class="type">VipsBandFormat</span></a>        : Read / Write</pre>
<p>Pixel format in image.</p>
<p>Default value: VIPS_FORMAT_UCHAR</p>
</div>
<hr>
<div class="refsect2">
<a name="VipsImage--height"></a><h3>The <code class="literal">"height"</code> property</h3>
<pre class="programlisting">  "height"                   <span class="type">gint</span>                  : Read / Write</pre>
<p>Image height in pixels.</p>
<p>Allowed values: [0,1000000]</p>
<p>Default value: 0</p>
</div>
<hr>
<div class="refsect2">
<a name="VipsImage--kill"></a><h3>The <code class="literal">"kill"</code> property</h3>
<pre class="programlisting">  "kill"                     <span class="type">gboolean</span>              : Read / Write</pre>
<p>Block evaluation on this image.</p>
<p>Default value: FALSE</p>
</div>
<hr>
<div class="refsect2">
<a name="VipsImage--mode"></a><h3>The <code class="literal">"mode"</code> property</h3>
<pre class="programlisting">  "mode"                     <span class="type">gchar</span>*                : Read / Write</pre>
<p>Open mode.</p>
<p>Default value: "p"</p>
</div>
<hr>
<div class="refsect2">
<a name="VipsImage--sizeof-header"></a><h3>The <code class="literal">"sizeof-header"</code> property</h3>
<pre class="programlisting">  "sizeof-header"            <span class="type">gint</span>                  : Read / Write</pre>
<p>Offset in bytes from start of file.</p>
<p>Allowed values: [0,1000000]</p>
<p>Default value: 64</p>
</div>
<hr>
<div class="refsect2">
<a name="VipsImage--width"></a><h3>The <code class="literal">"width"</code> property</h3>
<pre class="programlisting">  "width"                    <span class="type">gint</span>                  : Read / Write</pre>
<p>Image width in pixels.</p>
<p>Allowed values: [0,1000000]</p>
<p>Default value: 0</p>
</div>
</div>
<div class="refsect1">
<a name="VipsImage.signal-details"></a><h2>Signal Details</h2>
<div class="refsect2">
<a name="VipsImage-eval"></a><h3>The <code class="literal">"eval"</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                user_function                      (<a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *vipsimage,
                                                        <span class="type">gpointer</span>   arg1,
                                                        <span class="type">gpointer</span>   user_data)      : <code class="literal">Run Last</code></pre>
</div>
<hr>
<div class="refsect2">
<a name="VipsImage-invalidate"></a><h3>The <code class="literal">"invalidate"</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                user_function                      (<a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *vipsimage,
                                                        <span class="type">gpointer</span>   user_data)      : <code class="literal">Action</code></pre>
</div>
<hr>
<div class="refsect2">
<a name="VipsImage-posteval"></a><h3>The <code class="literal">"posteval"</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                user_function                      (<a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *vipsimage,
                                                        <span class="type">gpointer</span>   arg1,
                                                        <span class="type">gpointer</span>   user_data)      : <code class="literal">Run Last</code></pre>
</div>
<hr>
<div class="refsect2">
<a name="VipsImage-preeval"></a><h3>The <code class="literal">"preeval"</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                user_function                      (<a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *vipsimage,
                                                        <span class="type">gpointer</span>   arg1,
                                                        <span class="type">gpointer</span>   user_data)      : <code class="literal">Run Last</code></pre>
</div>
<hr>
<div class="refsect2">
<a name="VipsImage-written"></a><h3>The <code class="literal">"written"</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                user_function                      (<a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *vipsimage,
                                                        <span class="type">gpointer</span>   arg1,
                                                        <span class="type">gpointer</span>   user_data)      : <code class="literal">Action</code></pre>
</div>
</div>
<div class="refsect1">
<a name="VipsImage.see-also"></a><h2>See Also</h2>
region
</div>
</div>
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