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|
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>General API</title>
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<tr><td colspan="5" class="shortcuts"><nobr><a href="#cogl-General-API.synopsis" class="shortcut">Top</a>
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<a href="#cogl-General-API.description" class="shortcut">Description</a></nobr></td></tr>
</table>
<div class="refentry" lang="en">
<a name="cogl-General-API"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="cogl-General-API.top_of_page"></a>General API</span></h2>
<p>General API — General purpose API</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="cogl-General-API.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
#define <a class="link" href="cogl-General-API.html#COGL-PIXEL-FORMAT-24:CAPS" title="COGL_PIXEL_FORMAT_24">COGL_PIXEL_FORMAT_24</a>
#define <a class="link" href="cogl-General-API.html#COGL-PIXEL-FORMAT-32:CAPS" title="COGL_PIXEL_FORMAT_32">COGL_PIXEL_FORMAT_32</a>
#define <a class="link" href="cogl-General-API.html#COGL-A-BIT:CAPS" title="COGL_A_BIT">COGL_A_BIT</a>
#define <a class="link" href="cogl-General-API.html#COGL-BGR-BIT:CAPS" title="COGL_BGR_BIT">COGL_BGR_BIT</a>
#define <a class="link" href="cogl-General-API.html#COGL-AFIRST-BIT:CAPS" title="COGL_AFIRST_BIT">COGL_AFIRST_BIT</a>
#define <a class="link" href="cogl-General-API.html#COGL-PREMULT-BIT:CAPS" title="COGL_PREMULT_BIT">COGL_PREMULT_BIT</a>
#define <a class="link" href="cogl-General-API.html#COGL-UNORDERED-MASK:CAPS" title="COGL_UNORDERED_MASK">COGL_UNORDERED_MASK</a>
#define <a class="link" href="cogl-General-API.html#COGL-UNPREMULT-MASK:CAPS" title="COGL_UNPREMULT_MASK">COGL_UNPREMULT_MASK</a>
enum <a class="link" href="cogl-General-API.html#CoglPixelFormat" title="enum CoglPixelFormat">CoglPixelFormat</a>;
enum <a class="link" href="cogl-General-API.html#CoglBufferTarget" title="enum CoglBufferTarget">CoglBufferTarget</a>;
void <a class="link" href="cogl-General-API.html#cogl-perspective" title="cogl_perspective ()">cogl_perspective</a> (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> fovy,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> aspect,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> z_near,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> z_far);
void <a class="link" href="cogl-General-API.html#cogl-setup-viewport" title="cogl_setup_viewport ()">cogl_setup_viewport</a> (guint width,
guint height,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> fovy,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> aspect,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> z_near,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> z_far);
void <a class="link" href="cogl-General-API.html#cogl-get-modelview-matrix" title="cogl_get_modelview_matrix ()">cogl_get_modelview_matrix</a> (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> m[16]);
void <a class="link" href="cogl-General-API.html#cogl-get-projection-matrix" title="cogl_get_projection_matrix ()">cogl_get_projection_matrix</a> (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> m[16]);
void <a class="link" href="cogl-General-API.html#cogl-get-viewport" title="cogl_get_viewport ()">cogl_get_viewport</a> (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> v[4]);
void <a class="link" href="cogl-General-API.html#cogl-push-matrix" title="cogl_push_matrix ()">cogl_push_matrix</a> (void);
void <a class="link" href="cogl-General-API.html#cogl-pop-matrix" title="cogl_pop_matrix ()">cogl_pop_matrix</a> (void);
void <a class="link" href="cogl-General-API.html#cogl-scale" title="cogl_scale ()">cogl_scale</a> (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> x,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> y);
void <a class="link" href="cogl-General-API.html#cogl-translatex" title="cogl_translatex ()">cogl_translatex</a> (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> x,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> y,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> z);
void <a class="link" href="cogl-General-API.html#cogl-translate" title="cogl_translate ()">cogl_translate</a> (gint x,
gint y,
gint z);
void <a class="link" href="cogl-General-API.html#cogl-rotatex" title="cogl_rotatex ()">cogl_rotatex</a> (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> angle,
gint x,
gint y,
gint z);
void <a class="link" href="cogl-General-API.html#cogl-rotate" title="cogl_rotate ()">cogl_rotate</a> (gint angle,
gint x,
gint y,
gint z);
void <a class="link" href="cogl-General-API.html#cogl-clip-set" title="cogl_clip_set ()">cogl_clip_set</a> (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> x_offset,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> y_offset,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> width,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> height);
void <a class="link" href="cogl-General-API.html#cogl-clip-unset" title="cogl_clip_unset ()">cogl_clip_unset</a> (void);
void <a class="link" href="cogl-General-API.html#cogl-enable-depth-test" title="cogl_enable_depth_test ()">cogl_enable_depth_test</a> (gboolean setting);
void <a class="link" href="cogl-General-API.html#cogl-alpha-func" title="cogl_alpha_func ()">cogl_alpha_func</a> (COGLenum func,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> ref);
void <a class="link" href="cogl-General-API.html#cogl-fog-set" title="cogl_fog_set ()">cogl_fog_set</a> (const <a
href="../clutter/clutter-Colors.html#ClutterColor"
>ClutterColor</a> *fog_color,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> density,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> z_near,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> z_far);
</pre>
</div>
<div class="refsect1" lang="en">
<a name="cogl-General-API.description"></a><h2>Description</h2>
<p>
General utility functions for COGL.</p>
<p>
</p>
</div>
<div class="refsect1" lang="en">
<a name="cogl-General-API.details"></a><h2>Details</h2>
<div class="refsect2" lang="en">
<a name="COGL-PIXEL-FORMAT-24:CAPS"></a><h3>COGL_PIXEL_FORMAT_24</h3>
<pre class="programlisting">#define COGL_PIXEL_FORMAT_24 2
</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="COGL-PIXEL-FORMAT-32:CAPS"></a><h3>COGL_PIXEL_FORMAT_32</h3>
<pre class="programlisting">#define COGL_PIXEL_FORMAT_32 3
</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="COGL-A-BIT:CAPS"></a><h3>COGL_A_BIT</h3>
<pre class="programlisting">#define COGL_A_BIT (1 << 4)
</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="COGL-BGR-BIT:CAPS"></a><h3>COGL_BGR_BIT</h3>
<pre class="programlisting">#define COGL_BGR_BIT (1 << 5)
</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="COGL-AFIRST-BIT:CAPS"></a><h3>COGL_AFIRST_BIT</h3>
<pre class="programlisting">#define COGL_AFIRST_BIT (1 << 6)
</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="COGL-PREMULT-BIT:CAPS"></a><h3>COGL_PREMULT_BIT</h3>
<pre class="programlisting">#define COGL_PREMULT_BIT (1 << 7)
</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="COGL-UNORDERED-MASK:CAPS"></a><h3>COGL_UNORDERED_MASK</h3>
<pre class="programlisting">#define COGL_UNORDERED_MASK 0x0F
</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="COGL-UNPREMULT-MASK:CAPS"></a><h3>COGL_UNPREMULT_MASK</h3>
<pre class="programlisting">#define COGL_UNPREMULT_MASK 0x7F
</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="CoglPixelFormat"></a><h3>enum CoglPixelFormat</h3>
<pre class="programlisting">typedef enum
{
COGL_PIXEL_FORMAT_ANY = 0,
COGL_PIXEL_FORMAT_A_8 = 1 | COGL_A_BIT,
COGL_PIXEL_FORMAT_RGB_565 = 4,
COGL_PIXEL_FORMAT_RGBA_4444 = 5 | COGL_A_BIT,
COGL_PIXEL_FORMAT_RGBA_5551 = 6 | COGL_A_BIT,
COGL_PIXEL_FORMAT_YUV = 7,
COGL_PIXEL_FORMAT_G_8 = 8,
COGL_PIXEL_FORMAT_RGB_888 = COGL_PIXEL_FORMAT_24,
COGL_PIXEL_FORMAT_BGR_888 = (COGL_PIXEL_FORMAT_24 |
COGL_BGR_BIT),
COGL_PIXEL_FORMAT_RGBA_8888 = COGL_PIXEL_FORMAT_32 |
COGL_A_BIT,
COGL_PIXEL_FORMAT_BGRA_8888 = (COGL_PIXEL_FORMAT_32 |
COGL_A_BIT |
COGL_BGR_BIT),
COGL_PIXEL_FORMAT_ARGB_8888 = (COGL_PIXEL_FORMAT_32 |
COGL_A_BIT |
COGL_AFIRST_BIT),
COGL_PIXEL_FORMAT_ABGR_8888 = (COGL_PIXEL_FORMAT_32 |
COGL_A_BIT |
COGL_BGR_BIT |
COGL_AFIRST_BIT),
COGL_PIXEL_FORMAT_RGBA_8888_PRE = (COGL_PIXEL_FORMAT_32 |
COGL_A_BIT |
COGL_PREMULT_BIT),
COGL_PIXEL_FORMAT_BGRA_8888_PRE = (COGL_PIXEL_FORMAT_32 |
COGL_A_BIT |
COGL_PREMULT_BIT |
COGL_BGR_BIT),
COGL_PIXEL_FORMAT_ARGB_8888_PRE = (COGL_PIXEL_FORMAT_32 |
COGL_A_BIT |
COGL_PREMULT_BIT |
COGL_AFIRST_BIT),
COGL_PIXEL_FORMAT_ABGR_8888_PRE = (COGL_PIXEL_FORMAT_32 |
COGL_A_BIT |
COGL_PREMULT_BIT |
COGL_BGR_BIT |
COGL_AFIRST_BIT),
COGL_PIXEL_FORMAT_RGBA_4444_PRE = (COGL_PIXEL_FORMAT_RGBA_4444 |
COGL_A_BIT |
COGL_PREMULT_BIT),
COGL_PIXEL_FORMAT_RGBA_5551_PRE = (COGL_PIXEL_FORMAT_RGBA_5551 |
COGL_A_BIT |
COGL_PREMULT_BIT),
} CoglPixelFormat;
</pre>
<p>
Pixel formats used by COGL.</p>
<p>
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="CoglBufferTarget"></a><h3>enum CoglBufferTarget</h3>
<pre class="programlisting">typedef enum
{
COGL_WINDOW_BUFFER = (1 << 1),
COGL_MASK_BUFFER = (1 << 2),
COGL_OFFSCREEN_BUFFER = (1 << 3)
} CoglBufferTarget;
</pre>
<p>
</p>
<p>
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="cogl-perspective"></a><h3>cogl_perspective ()</h3>
<pre class="programlisting">void cogl_perspective (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> fovy,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> aspect,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> z_near,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> z_far);</pre>
<p>
Multiplies the current set matrix with a projection matrix based
on the provided values.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>fovy</code></em> :</span></p></td>
<td> Vertical of view angle in degrees.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>aspect</code></em> :</span></p></td>
<td> Aspect ratio of diesplay
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>z_near</code></em> :</span></p></td>
<td> Nearest visible point
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>z_far</code></em> :</span></p></td>
<td> Furthest visible point along the z-axis
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="cogl-setup-viewport"></a><h3>cogl_setup_viewport ()</h3>
<pre class="programlisting">void cogl_setup_viewport (guint width,
guint height,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> fovy,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> aspect,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> z_near,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> z_far);</pre>
<p>
Replaces the current viewport and projection matrix with the given
values. The viewport is placed at the top left corner of the window
with the given width and height. The projection matrix is replaced
with one that has a viewing angle of <em class="parameter"><code>fovy</code></em> along the y-axis and a
view scaled according to <em class="parameter"><code>aspect</code></em> along the x-axis. The view is
clipped according to <em class="parameter"><code>z_near</code></em> and <em class="parameter"><code>z_far</code></em> on the z-axis.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>width</code></em> :</span></p></td>
<td> Width of the viewport
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>height</code></em> :</span></p></td>
<td> Height of the viewport
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>fovy</code></em> :</span></p></td>
<td> Field of view angle in degrees
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>aspect</code></em> :</span></p></td>
<td> Aspect ratio to determine the field of view along the x-axis
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>z_near</code></em> :</span></p></td>
<td> Nearest visible point along the z-axis
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>z_far</code></em> :</span></p></td>
<td> Furthest visible point along the z-axis
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="cogl-get-modelview-matrix"></a><h3>cogl_get_modelview_matrix ()</h3>
<pre class="programlisting">void cogl_get_modelview_matrix (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> m[16]);</pre>
<p>
Stores the current model-view matrix in <em class="parameter"><code>m</code></em>. The matrix is in
column-major order.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>m</code></em> :</span></p></td>
<td> pointer to a 4x4 array of <a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
><span class="type">ClutterFixed</span></a>s to receive the matrix
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="cogl-get-projection-matrix"></a><h3>cogl_get_projection_matrix ()</h3>
<pre class="programlisting">void cogl_get_projection_matrix (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> m[16]);</pre>
<p>
Stores the current projection matrix in <em class="parameter"><code>m</code></em>. The matrix is in
column-major order.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>m</code></em> :</span></p></td>
<td> pointer to a 4x4 array of <a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
><span class="type">ClutterFixed</span></a>s to receive the matrix
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="cogl-get-viewport"></a><h3>cogl_get_viewport ()</h3>
<pre class="programlisting">void cogl_get_viewport (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> v[4]);</pre>
<p>
Stores the current viewport in <em class="parameter"><code>v</code></em>. <em class="parameter"><code>v</code></em>[0] and <em class="parameter"><code>v</code></em>[1] get the x and y
position of the viewport and <em class="parameter"><code>v</code></em>[2] and <em class="parameter"><code>v</code></em>[3] get the width and
height.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>v</code></em> :</span></p></td>
<td> pointer to a 4 element array of <a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
><span class="type">ClutterFixed</span></a>s to
receive the viewport dimensions.
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="cogl-push-matrix"></a><h3>cogl_push_matrix ()</h3>
<pre class="programlisting">void cogl_push_matrix (void);</pre>
<p>
Store the current model-view matrix on the matrix stack. The matrix
can later be restored with <a class="link" href="cogl-General-API.html#cogl-pop-matrix" title="cogl_pop_matrix ()"><code class="function">cogl_pop_matrix()</code></a>.</p>
<p>
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="cogl-pop-matrix"></a><h3>cogl_pop_matrix ()</h3>
<pre class="programlisting">void cogl_pop_matrix (void);</pre>
<p>
Restore the current model-view matrix from the matrix stack.</p>
<p>
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="cogl-scale"></a><h3>cogl_scale ()</h3>
<pre class="programlisting">void cogl_scale (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> x,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> y);</pre>
<p>
Multiplies the current model-view matrix by one that scales the x
and y axes by the given values.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>x</code></em> :</span></p></td>
<td> Amount to scale along the x-axis
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y</code></em> :</span></p></td>
<td> Amount to scale along the y-axis
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="cogl-translatex"></a><h3>cogl_translatex ()</h3>
<pre class="programlisting">void cogl_translatex (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> x,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> y,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> z);</pre>
<p>
Multiplies the current model-view matrix by one that translates the
model along all three axes according to the given values.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>x</code></em> :</span></p></td>
<td> Distance to translate along the x-axis
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y</code></em> :</span></p></td>
<td> Distance to translate along the y-axis
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>z</code></em> :</span></p></td>
<td> Distance to translate along the z-axis
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="cogl-translate"></a><h3>cogl_translate ()</h3>
<pre class="programlisting">void cogl_translate (gint x,
gint y,
gint z);</pre>
<p>
Integer version of <a class="link" href="cogl-General-API.html#cogl-translatex" title="cogl_translatex ()"><code class="function">cogl_translatex()</code></a>. Multiplies the current
model-view matrix by one that translates the model along all three
axes according to the given values.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>x</code></em> :</span></p></td>
<td> Distance to translate along the x-axis
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y</code></em> :</span></p></td>
<td> Distance to translate along the y-axis
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>z</code></em> :</span></p></td>
<td> Distance to translate along the z-axis
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="cogl-rotatex"></a><h3>cogl_rotatex ()</h3>
<pre class="programlisting">void cogl_rotatex (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> angle,
gint x,
gint y,
gint z);</pre>
<p>
Multiplies the current model-view matrix by one that rotates the
model around the vertex specified by <em class="parameter"><code>x</code></em>, <em class="parameter"><code>y</code></em> and <em class="parameter"><code>z</code></em>. The rotation
follows the right-hand thumb rule so for example rotating by 10
degrees about the vertex (0, 0, 1) causes a small counter-clockwise
rotation.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>angle</code></em> :</span></p></td>
<td> Angle in degrees to rotate.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>x</code></em> :</span></p></td>
<td> X-component of vertex to rotate around.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y</code></em> :</span></p></td>
<td> Y-component of vertex to rotate around.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>z</code></em> :</span></p></td>
<td> Z-component of vertex to rotate around.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="cogl-rotate"></a><h3>cogl_rotate ()</h3>
<pre class="programlisting">void cogl_rotate (gint angle,
gint x,
gint y,
gint z);</pre>
<p>
Integer version of <a class="link" href="cogl-General-API.html#cogl-rotatex" title="cogl_rotatex ()"><code class="function">cogl_rotatex()</code></a>. Multiplies the current
model-view matrix by one that rotates the model around the vertex
specified by <em class="parameter"><code>x</code></em>, <em class="parameter"><code>y</code></em> and <em class="parameter"><code>z</code></em>.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>angle</code></em> :</span></p></td>
<td> Angle in degrees to rotate.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>x</code></em> :</span></p></td>
<td> X-component of vertex to rotate around.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y</code></em> :</span></p></td>
<td> Y-component of vertex to rotate around.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>z</code></em> :</span></p></td>
<td> Z-component of vertex to rotate around.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="cogl-clip-set"></a><h3>cogl_clip_set ()</h3>
<pre class="programlisting">void cogl_clip_set (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> x_offset,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> y_offset,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> width,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> height);</pre>
<p>
Specifies a rectangular clipping area for all subsequent drawing
operations. Any drawing commands that extend outside the rectangle
will be clipped so that only the portion inside the rectangle will
be displayed. The rectangle dimensions are transformed by the
current model-view matrix.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>x_offset</code></em> :</span></p></td>
<td> left edge of the clip rectangle
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y_offset</code></em> :</span></p></td>
<td> top edge of the clip rectangle
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>width</code></em> :</span></p></td>
<td> width of the clip rectangle
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>height</code></em> :</span></p></td>
<td> height of the clip rectangle
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="cogl-clip-unset"></a><h3>cogl_clip_unset ()</h3>
<pre class="programlisting">void cogl_clip_unset (void);</pre>
<p>
Removes the current clipping rectangle so that all drawing
operations extend to full size of the viewport again.</p>
<p>
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="cogl-enable-depth-test"></a><h3>cogl_enable_depth_test ()</h3>
<pre class="programlisting">void cogl_enable_depth_test (gboolean setting);</pre>
<p>
Sets whether depth testing is enabled. If it is disabled then the
order that actors are layered on the screen depends solely on the
order specified using <a
href="../clutter/ClutterActor.html#clutter-actor-raise"
><code class="function">clutter_actor_raise()</code></a> and
<a
href="../clutter/ClutterActor.html#clutter-actor-lower"
><code class="function">clutter_actor_lower()</code></a>, otherwise it will also take into account the
actor's depth. Depth testing is disabled by default.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>setting</code></em> :</span></p></td>
<td> <code class="literal">TRUE</code> to enable depth testing or <code class="literal">FALSE</code> to disable.
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="cogl-alpha-func"></a><h3>cogl_alpha_func ()</h3>
<pre class="programlisting">void cogl_alpha_func (COGLenum func,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> ref);</pre>
<p>
Changes the alpha test to use the specified function specified in <em class="parameter"><code>func</code></em>,
comparing with the value in <em class="parameter"><code>ref</code></em>. The default function is CGL_ALWAYS the
initial reference value is 1.0.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>func</code></em> :</span></p></td>
<td> the comparison function to use, one of CGL_NEVER, CGL_LESS,
CGL_EQUAL, CGL_LEQUAL, CGL_GREATER, CGL_NOTEQUAL, CGL_GEQUAL and GL_ALWAYS.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>ref</code></em> :</span></p></td>
<td> reference value.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="cogl-fog-set"></a><h3>cogl_fog_set ()</h3>
<pre class="programlisting">void cogl_fog_set (const <a
href="../clutter/clutter-Colors.html#ClutterColor"
>ClutterColor</a> *fog_color,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> density,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> z_near,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> z_far);</pre>
<p>
Enables fogging. Fogging causes vertices that are further away from
the eye to be rendered with a different color. The color is
linearly interpolated so that vertices at <em class="parameter"><code>z_near</code></em> are drawn fully
with their original color and vertices at <em class="parameter"><code>z_far</code></em> are drawn fully
with <em class="parameter"><code>fog_color</code></em>. Fogging will remain enabled until the next call to
<a class="link" href="cogl-Utility-API.html#cogl-paint-init" title="cogl_paint_init ()"><code class="function">cogl_paint_init()</code></a>.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>fog_color</code></em> :</span></p></td>
<td> The color of the fog
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>density</code></em> :</span></p></td>
<td> Ignored
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>z_near</code></em> :</span></p></td>
<td> Position along z-axis where no fogging should be applied
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>z_far</code></em> :</span></p></td>
<td> Position along z-axes where full fogging should be applied
</td>
</tr>
</tbody>
</table></div>
</div>
</div>
</div>
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