68 lines
8.6 KiB
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68 lines
8.6 KiB
HTML
<html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>gimpconvert</title><meta name="generator" content="DocBook XSL Stylesheets V1.66.1"><link rel="start" href="index.html" title="GIMP Library Reference Manual"><link rel="up" href="libgimp-image.html" title="Manupulating Images and all their Properties"><link rel="prev" href="libgimp-gimpcolor.html" title="gimpcolor"><link rel="next" href="libgimp-gimpdisplay.html" title="gimpdisplay"><meta name="generator" content="GTK-Doc V1.3 (XML mode)"><link rel="stylesheet" href="style.css" type="text/css"><link rel="part" href="gimpdefinitions.html" title="Part I. GIMP Constants"><link rel="part" href="libgimp.html" title="Part II. GIMP Library"><link rel="chapter" href="libgimp-general.html" title="Functions not Related to Specific Images"><link rel="chapter" href="libgimp-image.html" title="Manupulating Images and all their Properties"><link rel="chapter" href="libgimp-data.html" title="Data Objects"><link rel="chapter" href="libgimp-selectors.html" title="Controlling the Core's Selection Dialogs"><link rel="part" href="libgimpui.html" title="Part III. GIMP User Interface Library"><link rel="chapter" href="libgimpui-hierarchy.html" title="Object Hierarchy"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><table class="navigation" width="100%" summary="Navigation header" cellpadding="2" cellspacing="2"><tr valign="middle"><td><a accesskey="p" href="libgimp-gimpcolor.html"><img src="left.png" width="24" height="24" border="0" alt="Prev"></a></td><td><a accesskey="u" href="libgimp-image.html"><img src="up.png" width="24" height="24" border="0" alt="Up"></a></td><td><a accesskey="h" href="index.html"><img src="home.png" width="24" height="24" border="0" alt="Home"></a></td><th width="100%" align="center">GIMP Library Reference Manual</th><td><a accesskey="n" href="libgimp-gimpdisplay.html"><img src="right.png" width="24" height="24" border="0" alt="Next"></a></td></tr></table><div class="refentry" lang="en"><a name="libgimp-gimpconvert"></a><div class="titlepage"></div><div class="refnamediv"><table width="100%"><tr><td valign="top"><h2><span class="refentrytitle">gimpconvert</span></h2><p>gimpconvert — Conversions between RGB, indexed, and grayscale modes.</p></td><td valign="top" align="right"></td></tr></table></div><div class="refsynopsisdiv"><h2>Synopsis</h2><pre class="synopsis">
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gboolean <a href="libgimp-gimpconvert.html#gimp-image-convert-rgb">gimp_image_convert_rgb</a> (gint32 image_ID);
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gboolean <a href="libgimp-gimpconvert.html#gimp-image-convert-grayscale">gimp_image_convert_grayscale</a> (gint32 image_ID);
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gboolean <a href="libgimp-gimpconvert.html#gimp-image-convert-indexed">gimp_image_convert_indexed</a> (gint32 image_ID,
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<a href="libgimp-gimpenums.html#GimpConvertDitherType">GimpConvertDitherType</a> dither_type,
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<a href="libgimp-gimpenums.html#GimpConvertPaletteType">GimpConvertPaletteType</a> palette_type,
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gint num_cols,
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gboolean alpha_dither,
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gboolean remove_unused,
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const gchar *palette);
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</pre></div><div class="refsect1" lang="en"><a name="id2590279"></a><h2>Description</h2><p>
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Conversions between RGB, indexed, and grayscale modes.
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</p></div><div class="refsect1" lang="en"><a name="id2590290"></a><h2>Details</h2><div class="refsect2" lang="en"><a name="id2590295"></a><h3><a name="gimp-image-convert-rgb"></a>gimp_image_convert_rgb ()</h3><a class="indexterm" name="id2590303"></a><pre class="programlisting">gboolean gimp_image_convert_rgb (gint32 image_ID);</pre><p>
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Convert specified image to RGB color
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</p><p>
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This procedure converts the specified image to RGB color. This
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process requires an image of type GIMP_GRAY or GIMP_INDEXED. No
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image content is lost in this process aside from the colormap for an
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indexed image.</p><p>
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</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>image_ID</tt></i> :</span></td><td> The image.
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</td></tr><tr><td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td><td> TRUE on success.
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</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2594814"></a><h3><a name="gimp-image-convert-grayscale"></a>gimp_image_convert_grayscale ()</h3><a class="indexterm" name="id2594823"></a><pre class="programlisting">gboolean gimp_image_convert_grayscale (gint32 image_ID);</pre><p>
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Convert specified image to grayscale (256 intensity levels)
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</p><p>
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This procedure converts the specified image to grayscale with 8 bits
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per pixel (256 intensity levels). This process requires an image of
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type GIMP_RGB or GIMP_INDEXED.</p><p>
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</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>image_ID</tt></i> :</span></td><td> The image.
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</td></tr><tr><td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td><td> TRUE on success.
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</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2594877"></a><h3><a name="gimp-image-convert-indexed"></a>gimp_image_convert_indexed ()</h3><a class="indexterm" name="id2594886"></a><pre class="programlisting">gboolean gimp_image_convert_indexed (gint32 image_ID,
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<a href="libgimp-gimpenums.html#GimpConvertDitherType">GimpConvertDitherType</a> dither_type,
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<a href="libgimp-gimpenums.html#GimpConvertPaletteType">GimpConvertPaletteType</a> palette_type,
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gint num_cols,
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gboolean alpha_dither,
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gboolean remove_unused,
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const gchar *palette);</pre><p>
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Convert specified image to and Indexed image
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</p><p>
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This procedure converts the specified image to 'indexed' color. This
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process requires an image of type GIMP_GRAY or GIMP_RGB. The
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'palette_type' specifies what kind of palette to use, A type of '0'
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means to use an optimal palette of 'num_cols' generated from the
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colors in the image. A type of '1' means to re-use the previous
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palette (not currently implemented). A type of '2' means to use the
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so-called WWW-optimized palette. Type '3' means to use only black
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and white colors. A type of '4' means to use a palette from the gimp
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palettes directories. The 'dither type' specifies what kind of
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dithering to use. '0' means no dithering, '1' means standard
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Floyd-Steinberg error diffusion, '2' means Floyd-Steinberg error
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diffusion with reduced bleeding, '3' means dithering based on pixel
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location ('Fixed' dithering).</p><p>
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</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>image_ID</tt></i> :</span></td><td> The image.
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</td></tr><tr><td><span class="term"><i class="parameter"><tt>dither_type</tt></i> :</span></td><td> The dither type to use.
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</td></tr><tr><td><span class="term"><i class="parameter"><tt>palette_type</tt></i> :</span></td><td> The type of palette to use.
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</td></tr><tr><td><span class="term"><i class="parameter"><tt>num_cols</tt></i> :</span></td><td> The number of colors to quantize to, ignored unless (palette_type == GIMP_MAKE_PALETTE).
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</td></tr><tr><td><span class="term"><i class="parameter"><tt>alpha_dither</tt></i> :</span></td><td> Dither transparency to fake partial opacity.
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</td></tr><tr><td><span class="term"><i class="parameter"><tt>remove_unused</tt></i> :</span></td><td> Remove unused or duplicate colour entries from final palette, ignored if (palette_type == GIMP_MAKE_PALETTE).
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</td></tr><tr><td><span class="term"><i class="parameter"><tt>palette</tt></i> :</span></td><td> The name of the custom palette to use, ignored unless (palette_type == GIMP_CUSTOM_PALETTE).
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</td></tr><tr><td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td><td> TRUE on success.
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</td></tr></tbody></table></div></div></div></div><table class="navigation" width="100%" summary="Navigation footer" cellpadding="2" cellspacing="0"><tr valign="middle"><td align="left"><a accesskey="p" href="libgimp-gimpcolor.html"><b><< gimpcolor</b></a></td><td align="right"><a accesskey="n" href="libgimp-gimpdisplay.html"><b>gimpdisplay >></b></a></td></tr></table></body></html>
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