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<h2><span class="refentrytitle"><a name="cogl-2.0-experimental-2D-textures.top_of_page"></a>2D textures</span></h2>
<p>2D textures — Functions for creating and manipulating 2D textures</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="cogl-2.0-experimental-2D-textures.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis"> <a class="link" href="cogl-2.0-experimental-2D-textures.html#CoglTexture2D" title="CoglTexture2D">CoglTexture2D</a>;
<a class="link" href="cogl-2.0-experimental-2D-textures.html#CoglTexture2D" title="CoglTexture2D"><span class="returnvalue">CoglTexture2D</span></a> * <a class="link" href="cogl-2.0-experimental-2D-textures.html#cogl-texture-2d-new-with-size" title="cogl_texture_2d_new_with_size ()">cogl_texture_2d_new_with_size</a> (<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-The-Top-Level-Context.html#CoglContext" title="CoglContext"><span class="type">CoglContext</span></a> *ctx</code></em>,
<em class="parameter"><code><span class="type">int</span> width</code></em>,
<em class="parameter"><code><span class="type">int</span> height</code></em>,
<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-Common-Types.html#CoglPixelFormat" title="enum CoglPixelFormat"><span class="type">CoglPixelFormat</span></a> internal_format</code></em>);
<a class="link" href="cogl-2.0-experimental-2D-textures.html#CoglTexture2D" title="CoglTexture2D"><span class="returnvalue">CoglTexture2D</span></a> * <a class="link" href="cogl-2.0-experimental-2D-textures.html#cogl-texture-2d-new-from-file" title="cogl_texture_2d_new_from_file ()">cogl_texture_2d_new_from_file</a> (<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-The-Top-Level-Context.html#CoglContext" title="CoglContext"><span class="type">CoglContext</span></a> *ctx</code></em>,
<em class="parameter"><code>const <span class="type">char</span> *filename</code></em>,
<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-Common-Types.html#CoglPixelFormat" title="enum CoglPixelFormat"><span class="type">CoglPixelFormat</span></a> internal_format</code></em>,
<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-Exception-handling.html#CoglError" title="CoglError"><span class="type">CoglError</span></a> **error</code></em>);
<a class="link" href="cogl-2.0-experimental-2D-textures.html#CoglTexture2D" title="CoglTexture2D"><span class="returnvalue">CoglTexture2D</span></a> * <a class="link" href="cogl-2.0-experimental-2D-textures.html#cogl-texture-2d-new-from-bitmap" title="cogl_texture_2d_new_from_bitmap ()">cogl_texture_2d_new_from_bitmap</a> (<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-Bitmap.html#CoglBitmap" title="CoglBitmap"><span class="type">CoglBitmap</span></a> *bitmap</code></em>,
<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-Common-Types.html#CoglPixelFormat" title="enum CoglPixelFormat"><span class="type">CoglPixelFormat</span></a> internal_format</code></em>,
<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-Exception-handling.html#CoglError" title="CoglError"><span class="type">CoglError</span></a> **error</code></em>);
<a class="link" href="cogl-2.0-experimental-2D-textures.html#CoglTexture2D" title="CoglTexture2D"><span class="returnvalue">CoglTexture2D</span></a> * <a class="link" href="cogl-2.0-experimental-2D-textures.html#cogl-texture-2d-new-from-data" title="cogl_texture_2d_new_from_data ()">cogl_texture_2d_new_from_data</a> (<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-The-Top-Level-Context.html#CoglContext" title="CoglContext"><span class="type">CoglContext</span></a> *ctx</code></em>,
<em class="parameter"><code><span class="type">int</span> width</code></em>,
<em class="parameter"><code><span class="type">int</span> height</code></em>,
<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-Common-Types.html#CoglPixelFormat" title="enum CoglPixelFormat"><span class="type">CoglPixelFormat</span></a> format</code></em>,
<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-Common-Types.html#CoglPixelFormat" title="enum CoglPixelFormat"><span class="type">CoglPixelFormat</span></a> internal_format</code></em>,
<em class="parameter"><code><span class="type">int</span> rowstride</code></em>,
<em class="parameter"><code>const <span class="type">uint8_t</span> *data</code></em>,
<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-Exception-handling.html#CoglError" title="CoglError"><span class="type">CoglError</span></a> **error</code></em>);
<a class="link" href="cogl-2.0-experimental-2D-textures.html#CoglTexture2D" title="CoglTexture2D"><span class="returnvalue">CoglTexture2D</span></a> * <a class="link" href="cogl-2.0-experimental-2D-textures.html#cogl-texture-2d-new-from-foreign" title="cogl_texture_2d_new_from_foreign ()">cogl_texture_2d_new_from_foreign</a> (<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-The-Top-Level-Context.html#CoglContext" title="CoglContext"><span class="type">CoglContext</span></a> *ctx</code></em>,
<em class="parameter"><code>unsigned <span class="type">int</span> gl_handle</code></em>,
<em class="parameter"><code><span class="type">int</span> width</code></em>,
<em class="parameter"><code><span class="type">int</span> height</code></em>,
<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-Common-Types.html#CoglPixelFormat" title="enum CoglPixelFormat"><span class="type">CoglPixelFormat</span></a> format</code></em>,
<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-Exception-handling.html#CoglError" title="CoglError"><span class="type">CoglError</span></a> **error</code></em>);
<a class="link" href="cogl-2.0-experimental-Common-Types.html#CoglBool" title="CoglBool"><span class="returnvalue">CoglBool</span></a> <a class="link" href="cogl-2.0-experimental-2D-textures.html#cogl-is-texture-rectangle" title="cogl_is_texture_rectangle ()">cogl_is_texture_rectangle</a> (<em class="parameter"><code><span class="type">void</span> *object</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="cogl-2.0-experimental-2D-textures.description"></a><h2>Description</h2>
<p>
These functions allow low-level 2D textures to be allocated. These
differ from sliced textures for example which may internally be
made up of multiple 2D textures, or atlas textures where Cogl must
internally modify user texture coordinates before they can be used
by the GPU.
</p>
<p>
You should be aware that many GPUs only support power of two sizes
for <a class="link" href="cogl-2.0-experimental-2D-textures.html#CoglTexture2D" title="CoglTexture2D"><span class="type">CoglTexture2D</span></a> textures. You can check support for non power of
two textures by checking for the <a class="link" href="cogl-2.0-experimental-The-Top-Level-Context.html#COGL-FEATURE-ID-TEXTURE-NPOT:CAPS"><code class="literal">COGL_FEATURE_ID_TEXTURE_NPOT</code></a> feature
via <a class="link" href="cogl-2.0-experimental-The-Top-Level-Context.html#cogl-has-feature" title="cogl_has_feature ()"><code class="function">cogl_has_feature()</code></a>.
</p>
</div>
<div class="refsect1">
<a name="cogl-2.0-experimental-2D-textures.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="CoglTexture2D"></a><h3>CoglTexture2D</h3>
<pre class="programlisting">typedef struct _CoglTexture2D CoglTexture2D;</pre>
</div>
<hr>
<div class="refsect2">
<a name="cogl-texture-2d-new-with-size"></a><h3>cogl_texture_2d_new_with_size ()</h3>
<pre class="programlisting"><a class="link" href="cogl-2.0-experimental-2D-textures.html#CoglTexture2D" title="CoglTexture2D"><span class="returnvalue">CoglTexture2D</span></a> * cogl_texture_2d_new_with_size (<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-The-Top-Level-Context.html#CoglContext" title="CoglContext"><span class="type">CoglContext</span></a> *ctx</code></em>,
<em class="parameter"><code><span class="type">int</span> width</code></em>,
<em class="parameter"><code><span class="type">int</span> height</code></em>,
<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-Common-Types.html#CoglPixelFormat" title="enum CoglPixelFormat"><span class="type">CoglPixelFormat</span></a> internal_format</code></em>);</pre>
<p>
Allocates a low-level <a class="link" href="cogl-2.0-experimental-2D-textures.html#CoglTexture2D" title="CoglTexture2D"><span class="type">CoglTexture2D</span></a> texture that your GPU can
texture from directly. This is unlike sliced textures for example
which may be comprised of multiple internal textures, or atlas
textures where Cogl has to modify texture coordinates before they
may be used by the GPU.
</p>
<p>
The storage for the texture is not allocated before this function
returns. You can call <code class="function">cogl_texture_allocate()</code> to explicitly
allocate the underlying storage or preferably let Cogl
automatically allocate storage lazily when it may know more about
how the texture is being used and can optimize how it is allocated.
</p>
<p>
</p>
<div class="note" style="margin-left: 0.5in; margin-right: 0.5in;">
<h3 class="title">Note</h3>Many GPUs only support power of two sizes for <a class="link" href="cogl-2.0-experimental-2D-textures.html#CoglTexture2D" title="CoglTexture2D"><span class="type">CoglTexture2D</span></a>
textures. You can check support for non power of two textures by
checking for the <a class="link" href="cogl-2.0-experimental-The-Top-Level-Context.html#COGL-FEATURE-ID-TEXTURE-NPOT:CAPS"><code class="literal">COGL_FEATURE_ID_TEXTURE_NPOT</code></a> feature via
<a class="link" href="cogl-2.0-experimental-The-Top-Level-Context.html#cogl-has-feature" title="cogl_has_feature ()"><code class="function">cogl_has_feature()</code></a>.</div>
<p>
</p>
<div class="variablelist"><table border="0" class="variablelist">
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<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>ctx</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-2.0-experimental-The-Top-Level-Context.html#CoglContext" title="CoglContext"><span class="type">CoglContext</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>width</code></em> :</span></p></td>
<td>Width of the texture to allocate</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>height</code></em> :</span></p></td>
<td>Height of the texture to allocate</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>internal_format</code></em> :</span></p></td>
<td>The format of the texture</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>A new <a class="link" href="cogl-2.0-experimental-2D-textures.html#CoglTexture2D" title="CoglTexture2D"><span class="type">CoglTexture2D</span></a> object with no storage yet allocated. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.0</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-texture-2d-new-from-file"></a><h3>cogl_texture_2d_new_from_file ()</h3>
<pre class="programlisting"><a class="link" href="cogl-2.0-experimental-2D-textures.html#CoglTexture2D" title="CoglTexture2D"><span class="returnvalue">CoglTexture2D</span></a> * cogl_texture_2d_new_from_file (<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-The-Top-Level-Context.html#CoglContext" title="CoglContext"><span class="type">CoglContext</span></a> *ctx</code></em>,
<em class="parameter"><code>const <span class="type">char</span> *filename</code></em>,
<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-Common-Types.html#CoglPixelFormat" title="enum CoglPixelFormat"><span class="type">CoglPixelFormat</span></a> internal_format</code></em>,
<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-Exception-handling.html#CoglError" title="CoglError"><span class="type">CoglError</span></a> **error</code></em>);</pre>
<p>
Creates a <a class="link" href="cogl-2.0-experimental-2D-textures.html#CoglTexture2D" title="CoglTexture2D"><span class="type">CoglTexture2D</span></a> from an image file.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>ctx</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-2.0-experimental-The-Top-Level-Context.html#CoglContext" title="CoglContext"><span class="type">CoglContext</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>filename</code></em> :</span></p></td>
<td>the file to load</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>internal_format</code></em> :</span></p></td>
<td>the <a class="link" href="cogl-2.0-experimental-Common-Types.html#CoglPixelFormat" title="enum CoglPixelFormat"><span class="type">CoglPixelFormat</span></a> to use for the GPU storage of the
texture. If <a class="link" href="cogl-2.0-experimental-Common-Types.html#COGL-PIXEL-FORMAT-ANY:CAPS"><code class="literal">COGL_PIXEL_FORMAT_ANY</code></a> is given then a premultiplied
format similar to the format of the source data will be used. The
default blending equations of Cogl expect premultiplied color data;
the main use of passing a non-premultiplied format here is if you
have non-premultiplied source data and are going to adjust the blend
mode (see <code class="function">cogl_material_set_blend()</code>) or use the data for something
other than straight blending.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>error</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-2.0-experimental-Exception-handling.html#CoglError" title="CoglError"><span class="type">CoglError</span></a> to catch exceptional errors or <code class="literal">NULL</code>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>A newly created <a class="link" href="cogl-2.0-experimental-2D-textures.html#CoglTexture2D" title="CoglTexture2D"><span class="type">CoglTexture2D</span></a> or <code class="literal">NULL</code> on failure
and <em class="parameter"><code>error</code></em> will be updated. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.16</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-texture-2d-new-from-bitmap"></a><h3>cogl_texture_2d_new_from_bitmap ()</h3>
<pre class="programlisting"><a class="link" href="cogl-2.0-experimental-2D-textures.html#CoglTexture2D" title="CoglTexture2D"><span class="returnvalue">CoglTexture2D</span></a> * cogl_texture_2d_new_from_bitmap (<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-Bitmap.html#CoglBitmap" title="CoglBitmap"><span class="type">CoglBitmap</span></a> *bitmap</code></em>,
<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-Common-Types.html#CoglPixelFormat" title="enum CoglPixelFormat"><span class="type">CoglPixelFormat</span></a> internal_format</code></em>,
<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-Exception-handling.html#CoglError" title="CoglError"><span class="type">CoglError</span></a> **error</code></em>);</pre>
<p>
Creates a new <a class="link" href="cogl-2.0-experimental-2D-textures.html#CoglTexture2D" title="CoglTexture2D"><span class="type">CoglTexture2D</span></a> texture based on data residing in a
bitmap. These are unlike sliced textures for example which may be
comprised of multiple internal textures, or atlas textures where
Cogl has to modify texture coordinates before they may be used by
the GPU.
</p>
<p>
</p>
<div class="note" style="margin-left: 0.5in; margin-right: 0.5in;">
<h3 class="title">Note</h3>Many GPUs only support power of two sizes for <a class="link" href="cogl-2.0-experimental-2D-textures.html#CoglTexture2D" title="CoglTexture2D"><span class="type">CoglTexture2D</span></a>
textures. You can check support for non power of two textures by
checking for the <a class="link" href="cogl-2.0-experimental-The-Top-Level-Context.html#COGL-FEATURE-ID-TEXTURE-NPOT:CAPS"><code class="literal">COGL_FEATURE_ID_TEXTURE_NPOT</code></a> feature via
<a class="link" href="cogl-2.0-experimental-The-Top-Level-Context.html#cogl-has-feature" title="cogl_has_feature ()"><code class="function">cogl_has_feature()</code></a>.</div>
<p>
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>bitmap</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-2.0-experimental-Bitmap.html#CoglBitmap" title="CoglBitmap"><span class="type">CoglBitmap</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>internal_format</code></em> :</span></p></td>
<td>the <a class="link" href="cogl-2.0-experimental-Common-Types.html#CoglPixelFormat" title="enum CoglPixelFormat"><span class="type">CoglPixelFormat</span></a> that will be used for storing
the buffer on the GPU. If <a class="link" href="cogl-2.0-experimental-Common-Types.html#COGL-PIXEL-FORMAT-ANY:CAPS"><code class="literal">COGL_PIXEL_FORMAT_ANY</code></a> is given then a
premultiplied format similar to the format of the source data will
be used. The default blending equations of Cogl expect premultiplied
color data; the main use of passing a non-premultiplied format here
is if you have non-premultiplied source data and are going to adjust
the blend mode (see <a class="link" href="cogl-2.0-experimental-Pipeline.html#cogl-pipeline-set-blend" title="cogl_pipeline_set_blend ()"><code class="function">cogl_pipeline_set_blend()</code></a>) or use the data for
something other than straight blending.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>error</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-2.0-experimental-Exception-handling.html#CoglError" title="CoglError"><span class="type">CoglError</span></a> for exceptions</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>A newly allocated <a class="link" href="cogl-2.0-experimental-2D-textures.html#CoglTexture2D" title="CoglTexture2D"><span class="type">CoglTexture2D</span></a>, or if
the size is not supported (because it is too large or a
non-power-of-two size that the hardware doesn't support)
it will return <code class="literal">NULL</code> and set <em class="parameter"><code>error</code></em>. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.0</p>
<p class="stability">Stability Level: Unstable</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-texture-2d-new-from-data"></a><h3>cogl_texture_2d_new_from_data ()</h3>
<pre class="programlisting"><a class="link" href="cogl-2.0-experimental-2D-textures.html#CoglTexture2D" title="CoglTexture2D"><span class="returnvalue">CoglTexture2D</span></a> * cogl_texture_2d_new_from_data (<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-The-Top-Level-Context.html#CoglContext" title="CoglContext"><span class="type">CoglContext</span></a> *ctx</code></em>,
<em class="parameter"><code><span class="type">int</span> width</code></em>,
<em class="parameter"><code><span class="type">int</span> height</code></em>,
<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-Common-Types.html#CoglPixelFormat" title="enum CoglPixelFormat"><span class="type">CoglPixelFormat</span></a> format</code></em>,
<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-Common-Types.html#CoglPixelFormat" title="enum CoglPixelFormat"><span class="type">CoglPixelFormat</span></a> internal_format</code></em>,
<em class="parameter"><code><span class="type">int</span> rowstride</code></em>,
<em class="parameter"><code>const <span class="type">uint8_t</span> *data</code></em>,
<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-Exception-handling.html#CoglError" title="CoglError"><span class="type">CoglError</span></a> **error</code></em>);</pre>
<p>
Creates a new <a class="link" href="cogl-2.0-experimental-2D-textures.html#CoglTexture2D" title="CoglTexture2D"><span class="type">CoglTexture2D</span></a> texture based on data residing in memory.
These are unlike sliced textures for example which may be comprised
of multiple internal textures, or atlas textures where Cogl has to
modify texture coordinates before they may be used by the GPU.
</p>
<p>
</p>
<div class="note" style="margin-left: 0.5in; margin-right: 0.5in;">
<h3 class="title">Note</h3>Many GPUs only support power of two sizes for <a class="link" href="cogl-2.0-experimental-2D-textures.html#CoglTexture2D" title="CoglTexture2D"><span class="type">CoglTexture2D</span></a>
textures. You can check support for non power of two textures by
checking for the <a class="link" href="cogl-2.0-experimental-The-Top-Level-Context.html#COGL-FEATURE-ID-TEXTURE-NPOT:CAPS"><code class="literal">COGL_FEATURE_ID_TEXTURE_NPOT</code></a> feature via
<a class="link" href="cogl-2.0-experimental-The-Top-Level-Context.html#cogl-has-feature" title="cogl_has_feature ()"><code class="function">cogl_has_feature()</code></a>.</div>
<p>
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>ctx</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-2.0-experimental-The-Top-Level-Context.html#CoglContext" title="CoglContext"><span class="type">CoglContext</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>width</code></em> :</span></p></td>
<td>width of texture in pixels</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>height</code></em> :</span></p></td>
<td>height of texture in pixels</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>format</code></em> :</span></p></td>
<td>the <a class="link" href="cogl-2.0-experimental-Common-Types.html#CoglPixelFormat" title="enum CoglPixelFormat"><span class="type">CoglPixelFormat</span></a> the buffer is stored in in RAM</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>internal_format</code></em> :</span></p></td>
<td>the <a class="link" href="cogl-2.0-experimental-Common-Types.html#CoglPixelFormat" title="enum CoglPixelFormat"><span class="type">CoglPixelFormat</span></a> that will be used for storing
the buffer on the GPU. If <a class="link" href="cogl-2.0-experimental-Common-Types.html#COGL-PIXEL-FORMAT-ANY:CAPS"><code class="literal">COGL_PIXEL_FORMAT_ANY</code></a> is given then a
premultiplied format similar to the format of the source data will
be used. The default blending equations of Cogl expect premultiplied
color data; the main use of passing a non-premultiplied format here
is if you have non-premultiplied source data and are going to adjust
the blend mode (see <a class="link" href="cogl-2.0-experimental-Pipeline.html#cogl-pipeline-set-blend" title="cogl_pipeline_set_blend ()"><code class="function">cogl_pipeline_set_blend()</code></a>) or use the data for
something other than straight blending.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>rowstride</code></em> :</span></p></td>
<td>the memory offset in bytes between the starts of
scanlines in <em class="parameter"><code>data</code></em>. A value of 0 will make Cogl automatically
calculate <em class="parameter"><code>rowstride</code></em> from <em class="parameter"><code>width</code></em> and <em class="parameter"><code>format</code></em>.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>data</code></em> :</span></p></td>
<td>pointer the memory region where the source buffer resides</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>error</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-2.0-experimental-Exception-handling.html#CoglError" title="CoglError"><span class="type">CoglError</span></a> for exceptions</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>A newly allocated <a class="link" href="cogl-2.0-experimental-2D-textures.html#CoglTexture2D" title="CoglTexture2D"><span class="type">CoglTexture2D</span></a>, or if
the size is not supported (because it is too large or a
non-power-of-two size that the hardware doesn't support)
it will return <code class="literal">NULL</code> and set <em class="parameter"><code>error</code></em>. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.0</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-texture-2d-new-from-foreign"></a><h3>cogl_texture_2d_new_from_foreign ()</h3>
<pre class="programlisting"><a class="link" href="cogl-2.0-experimental-2D-textures.html#CoglTexture2D" title="CoglTexture2D"><span class="returnvalue">CoglTexture2D</span></a> * cogl_texture_2d_new_from_foreign (<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-The-Top-Level-Context.html#CoglContext" title="CoglContext"><span class="type">CoglContext</span></a> *ctx</code></em>,
<em class="parameter"><code>unsigned <span class="type">int</span> gl_handle</code></em>,
<em class="parameter"><code><span class="type">int</span> width</code></em>,
<em class="parameter"><code><span class="type">int</span> height</code></em>,
<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-Common-Types.html#CoglPixelFormat" title="enum CoglPixelFormat"><span class="type">CoglPixelFormat</span></a> format</code></em>,
<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-Exception-handling.html#CoglError" title="CoglError"><span class="type">CoglError</span></a> **error</code></em>);</pre>
<p>
Wraps an existing GL_TEXTURE_2D texture object as a <a class="link" href="cogl-2.0-experimental-2D-textures.html#CoglTexture2D" title="CoglTexture2D"><span class="type">CoglTexture2D</span></a>.
This can be used for integrating Cogl with software using OpenGL
directly.
</p>
<p>
</p>
<div class="note" style="margin-left: 0.5in; margin-right: 0.5in;">
<h3 class="title">Note</h3>The results are undefined for passing an invalid <em class="parameter"><code>gl_handle</code></em>
or if <em class="parameter"><code>width</code></em> or <em class="parameter"><code>height</code></em> don't have the correct texture
geometry.</div>
<p>
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>ctx</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-2.0-experimental-The-Top-Level-Context.html#CoglContext" title="CoglContext"><span class="type">CoglContext</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>gl_handle</code></em> :</span></p></td>
<td>A GL handle for a GL_TEXTURE_2D texture object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>width</code></em> :</span></p></td>
<td>Width of the foreign GL texture</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>height</code></em> :</span></p></td>
<td>Height of the foreign GL texture</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>format</code></em> :</span></p></td>
<td>The format of the texture</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>error</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-2.0-experimental-Exception-handling.html#CoglError" title="CoglError"><span class="type">CoglError</span></a> for exceptions</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>A newly allocated <a class="link" href="cogl-2.0-experimental-2D-textures.html#CoglTexture2D" title="CoglTexture2D"><span class="type">CoglTexture2D</span></a>, or
if Cogl could not validate the <em class="parameter"><code>gl_handle</code></em> in some way
(perhaps because of an unsupported format) it will return
<code class="literal">NULL</code> and set <em class="parameter"><code>error</code></em>. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.0</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-is-texture-rectangle"></a><h3>cogl_is_texture_rectangle ()</h3>
<pre class="programlisting"><a class="link" href="cogl-2.0-experimental-Common-Types.html#CoglBool" title="CoglBool"><span class="returnvalue">CoglBool</span></a> cogl_is_texture_rectangle (<em class="parameter"><code><span class="type">void</span> *object</code></em>);</pre>
<p>
Gets whether the given object references an existing
<a class="link" href="cogl-2.0-experimental-Rectangle-textures-(non-normalized-coordinates).html#CoglTextureRectangle" title="CoglTextureRectangle"><span class="type">CoglTextureRectangle</span></a> object.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-2.0-experimental-The-Object-Interface.html#CoglObject" title="CoglObject"><span class="type">CoglObject</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<code class="literal">TRUE</code> if the object references a
<a class="link" href="cogl-2.0-experimental-Rectangle-textures-(non-normalized-coordinates).html#CoglTextureRectangle" title="CoglTextureRectangle"><span class="type">CoglTextureRectangle</span></a>, <code class="literal">FALSE</code> otherwise.</td>
</tr>
</tbody>
</table></div>
</div>
</div>
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