335 lines
13 KiB
HTML
335 lines
13 KiB
HTML
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<tr><td colspan="5" class="shortcuts"><nobr><a href="#id2618840" class="shortcut">Top</a>
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 | 
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<a href="#id2632866" class="shortcut">Description</a></nobr></td></tr>
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</table>
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<div class="refentry" lang="en">
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<a name="libgimp-gimpconvert"></a><div class="titlepage"></div>
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<div class="refnamediv"><table width="100%"><tr>
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<td valign="top">
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<h2>
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<a name="id2618840"></a><span class="refentrytitle">gimpconvert</span>
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</h2>
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<p>gimpconvert — Conversions between RGB, indexed, and grayscale modes.</p>
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</td>
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<td valign="top" align="right"></td>
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</tr></table></div>
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<div class="refsynopsisdiv">
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<h2>Synopsis</h2>
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<pre class="synopsis">
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<a
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href="../glib/glib-Basic-Types.html#gboolean"
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>gboolean</a> <a class="link" href="libgimp-gimpconvert.html#gimp-image-convert-rgb">gimp_image_convert_rgb</a> (<a
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href="../glib/glib-Basic-Types.html#gint32"
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>gint32</a> image_ID);
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<a
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href="../glib/glib-Basic-Types.html#gboolean"
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>gboolean</a> <a class="link" href="libgimp-gimpconvert.html#gimp-image-convert-grayscale">gimp_image_convert_grayscale</a> (<a
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href="../glib/glib-Basic-Types.html#gint32"
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>gint32</a> image_ID);
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<a
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href="../glib/glib-Basic-Types.html#gboolean"
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>gboolean</a> <a class="link" href="libgimp-gimpconvert.html#gimp-image-convert-indexed">gimp_image_convert_indexed</a> (<a
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href="../glib/glib-Basic-Types.html#gint32"
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>gint32</a> image_ID,
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<a class="link" href="libgimp-gimpenums.html#GimpConvertDitherType">GimpConvertDitherType</a> dither_type,
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<a class="link" href="libgimp-gimpenums.html#GimpConvertPaletteType">GimpConvertPaletteType</a> palette_type,
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<a
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href="../glib/glib-Basic-Types.html#gint"
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>gint</a> num_cols,
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<a
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href="../glib/glib-Basic-Types.html#gboolean"
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>gboolean</a> alpha_dither,
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<a
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href="../glib/glib-Basic-Types.html#gboolean"
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>gboolean</a> remove_unused,
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const <a
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href="../glib/glib-Basic-Types.html#gchar"
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>gchar</a> *palette);
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<a
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href="../glib/glib-Basic-Types.html#gboolean"
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>gboolean</a> <a class="link" href="libgimp-gimpconvert.html#gimp-image-convert-set-dither-matrix">gimp_image_convert_set_dither_matrix</a>
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(<a
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href="../glib/glib-Basic-Types.html#gint"
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>gint</a> width,
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<a
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href="../glib/glib-Basic-Types.html#gint"
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>gint</a> height,
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<a
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href="../glib/glib-Basic-Types.html#gint"
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>gint</a> matrix_length,
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const <a
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href="../glib/glib-Basic-Types.html#guint8"
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>guint8</a> *matrix);
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</pre>
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</div>
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<div class="refsect1" lang="en">
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<a name="id2632866"></a><h2>Description</h2>
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<p>
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Conversions between RGB, indexed, and grayscale modes.
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</p>
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</div>
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<div class="refsect1" lang="en">
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<a name="id2632883"></a><h2>Details</h2>
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<div class="refsect2" lang="en">
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<a name="id2632894"></a><h3>
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<a name="gimp-image-convert-rgb"></a>gimp_image_convert_rgb ()</h3>
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<a class="indexterm" name="id2632905"></a><pre class="programlisting"><a
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href="../glib/glib-Basic-Types.html#gboolean"
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>gboolean</a> gimp_image_convert_rgb (<a
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href="../glib/glib-Basic-Types.html#gint32"
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>gint32</a> image_ID);</pre>
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<p>
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Convert specified image to RGB color
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</p>
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<p>
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This procedure converts the specified image to RGB color. This
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process requires an image in RGB or Indexed color mode. No image
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content is lost in this process aside from the colormap for an
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indexed image.</p>
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<p>
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</p>
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<div class="variablelist"><table border="0">
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<col align="left" valign="top">
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<tbody>
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<tr>
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<td><p><span class="term"><em class="parameter"><code>image_ID</code></em> :</span></p></td>
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<td> The image.
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</td>
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</tr>
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<tr>
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<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
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<td> TRUE on success.
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</td>
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</tr>
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</tbody>
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</table></div>
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</div>
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<hr>
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<div class="refsect2" lang="en">
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<a name="id2633814"></a><h3>
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<a name="gimp-image-convert-grayscale"></a>gimp_image_convert_grayscale ()</h3>
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<a class="indexterm" name="id2633825"></a><pre class="programlisting"><a
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href="../glib/glib-Basic-Types.html#gboolean"
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>gboolean</a> gimp_image_convert_grayscale (<a
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href="../glib/glib-Basic-Types.html#gint32"
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>gint32</a> image_ID);</pre>
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<p>
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Convert specified image to grayscale (256 intensity levels)
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</p>
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<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 in
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RGB or Indexed color mode.</p>
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<p>
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</p>
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<div class="variablelist"><table border="0">
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<col align="left" valign="top">
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<tbody>
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<tr>
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<td><p><span class="term"><em class="parameter"><code>image_ID</code></em> :</span></p></td>
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<td> The image.
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</td>
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</tr>
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<tr>
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<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
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<td> TRUE on success.
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</td>
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</tr>
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</tbody>
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</table></div>
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</div>
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<hr>
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<div class="refsect2" lang="en">
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<a name="id2633892"></a><h3>
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<a name="gimp-image-convert-indexed"></a>gimp_image_convert_indexed ()</h3>
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<a class="indexterm" name="id2633904"></a><pre class="programlisting"><a
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href="../glib/glib-Basic-Types.html#gboolean"
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>gboolean</a> gimp_image_convert_indexed (<a
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href="../glib/glib-Basic-Types.html#gint32"
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>gint32</a> image_ID,
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<a class="link" href="libgimp-gimpenums.html#GimpConvertDitherType">GimpConvertDitherType</a> dither_type,
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<a class="link" href="libgimp-gimpenums.html#GimpConvertPaletteType">GimpConvertPaletteType</a> palette_type,
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<a
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href="../glib/glib-Basic-Types.html#gint"
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>gint</a> num_cols,
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<a
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href="../glib/glib-Basic-Types.html#gboolean"
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>gboolean</a> alpha_dither,
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<a
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href="../glib/glib-Basic-Types.html#gboolean"
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>gboolean</a> remove_unused,
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const <a
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href="../glib/glib-Basic-Types.html#gchar"
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>gchar</a> *palette);</pre>
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<p>
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Convert specified image to and Indexed image
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</p>
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<p>
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This procedure converts the specified image to 'indexed' color. This
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process requires an image in RGB or Grayscale mode. 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>
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<p>
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</p>
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<div class="variablelist"><table border="0">
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<col align="left" valign="top">
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<tbody>
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<tr>
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<td><p><span class="term"><em class="parameter"><code>image_ID</code></em> :</span></p></td>
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<td> The image.
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</td>
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</tr>
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<tr>
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<td><p><span class="term"><em class="parameter"><code>dither_type</code></em> :</span></p></td>
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<td> The dither type to use.
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</td>
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</tr>
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<tr>
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<td><p><span class="term"><em class="parameter"><code>palette_type</code></em> :</span></p></td>
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<td> The type of palette to use.
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</td>
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</tr>
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<tr>
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<td><p><span class="term"><em class="parameter"><code>num_cols</code></em> :</span></p></td>
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<td> The number of colors to quantize to, ignored unless (palette_type == GIMP_MAKE_PALETTE).
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</td>
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</tr>
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<tr>
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<td><p><span class="term"><em class="parameter"><code>alpha_dither</code></em> :</span></p></td>
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<td> Dither transparency to fake partial opacity.
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</td>
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</tr>
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<tr>
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<td><p><span class="term"><em class="parameter"><code>remove_unused</code></em> :</span></p></td>
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<td> Remove unused or duplicate color entries from final palette, ignored if (palette_type == GIMP_MAKE_PALETTE).
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</td>
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</tr>
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<tr>
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<td><p><span class="term"><em class="parameter"><code>palette</code></em> :</span></p></td>
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<td> The name of the custom palette to use, ignored unless (palette_type == GIMP_CUSTOM_PALETTE).
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</td>
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</tr>
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<tr>
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<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
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<td> TRUE on success.
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</td>
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</tr>
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</tbody>
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</table></div>
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</div>
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<hr>
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<div class="refsect2" lang="en">
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<a name="id2631425"></a><h3>
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<a name="gimp-image-convert-set-dither-matrix"></a>gimp_image_convert_set_dither_matrix ()</h3>
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<a class="indexterm" name="id2631438"></a><pre class="programlisting"><a
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href="../glib/glib-Basic-Types.html#gboolean"
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>gboolean</a> gimp_image_convert_set_dither_matrix
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(<a
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href="../glib/glib-Basic-Types.html#gint"
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>gint</a> width,
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<a
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href="../glib/glib-Basic-Types.html#gint"
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>gint</a> height,
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<a
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href="../glib/glib-Basic-Types.html#gint"
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>gint</a> matrix_length,
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const <a
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href="../glib/glib-Basic-Types.html#guint8"
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>guint8</a> *matrix);</pre>
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<p>
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Set dither matrix for conversion to indexed
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</p>
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<p>
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This procedure sets the dither matrix used when converting images to
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INDEXED mode with positional dithering.</p>
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<p>
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</p>
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<div class="variablelist"><table border="0">
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<col align="left" valign="top">
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<tbody>
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<tr>
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<td><p><span class="term"><em class="parameter"><code>width</code></em> :</span></p></td>
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<td> Width of the matrix (0 to reset to default matrix).
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</td>
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</tr>
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<tr>
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<td><p><span class="term"><em class="parameter"><code>height</code></em> :</span></p></td>
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<td> Height of the matrix (0 to reset to default matrix).
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</td>
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</tr>
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<tr>
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<td><p><span class="term"><em class="parameter"><code>matrix_length</code></em> :</span></p></td>
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<td> The length of 'matrix'.
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</td>
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</tr>
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<tr>
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<td><p><span class="term"><em class="parameter"><code>matrix</code></em> :</span></p></td>
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<td> The matrix -- all values must be >= 1.
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</td>
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</tr>
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<tr>
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<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
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<td> TRUE on success.
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</td>
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</tr>
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</tbody>
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</table></div>
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<p class="since">Since GIMP 2.4
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</p>
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</div>
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</div>
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</div>
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</body>
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</html>
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