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added glutGetProcAddress and GLUT_FPS info

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git-svn-id: https://svn.code.sf.net/p/freeglut/code/trunk@75 7f0cb862-5218-0410-a997-914c9d46530a
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brianp 2003-06-18 14:07:17 +00:00
parent ed630514e1
commit 603205dba6
1 changed files with 50 additions and 1 deletions
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51
freeglut/freeglut/doc/freeglut_user_interface.html
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@ -144,7 +144,8 @@ Functions</a>
<br>13.3&nbsp; glutDeviceGet
<br>13.4&nbsp; glutGetModifiers
<br>13.5&nbsp; glutLayerGet
<br>13.6&nbsp; glutExtensionSupported</blockquote>
<br>13.6&nbsp; glutExtensionSupported
<br>13.7&nbsp; glutGetProcAddress</blockquote>
<p><br>14.0&nbsp; <a href="#FontRendering">Font Rendering Functions</a>
<blockquote>14.1&nbsp; glutBitmapCharacter
@ -269,7 +270,15 @@ in pixels for bitmapped fonts and in OpenGL units for the stroke fonts.
3.4.4&nbsp; Geometry Rendering</h3>
Two functions have been added to render a wireframe and a solid rhombic
dodecahedron.
<h3>
3.4.5&nbsp; Extension Function Queries</h3>
glutGetProcAddress is a wrapper for the glXGetProcAddressARB and
wglGetProcAddress functions.
<h1>
4.0&nbsp;<a NAME="Initialization"></a> Initialization Functions</h1>
<h2>
@ -810,6 +819,33 @@ have them fixed.
<h2>
13.6&nbsp; glutExtensionSupported</h2>
<h2>
13.7&nbsp; glutGetProcAddress</h2>
<p>
<tt>glutGetProcAddress</tt> returns a pointer to a named GL or FreeGLUT function.
</p>
<p><b>Usage</b>
<p><tt>void *glutGetProcAddress ( const char *procName ) ;</tt>
<p><tt>procName&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </tt>Name of
an OpenGL or GLUT function.
</p>
<p><b>Description</b>
<p><tt>glutGetProcAddress</tt> is useful for dealing with OpenGL extensions.
If an application calls OpenGL extension functions directly, that application
will only link/run with an OpenGL library that supports the extension.
By using a function pointer returned from glutGetProcAddress(), the
application will avoid this hard dependency and be more portable and
interoperate better with various implementations of OpenGL.
</p>
<p>
Both OpenGL functions and FreeGLUT functions can be queried with this function.
</p>
<p>
<b>NOTE</b>: this function is not supported in GLUT.
</p>
<h1>
14.0&nbsp;<a NAME="FontRendering"></a> Font Rendering Functions</h1>
<i>Freeglut</i> supports two types of font rendering:&nbsp; bitmap fonts,
@ -1307,6 +1343,19 @@ is the famous OpenGL teapot [add reference].
<h1>
20.0&nbsp;<a NAME="UsageNotes"></a> Usage Notes</h1>
<p>
The following environment variables are recognized by FreeGLUT:
</p>
<ul>
<li>GLUT_FPS - specifies a time interval (in milliseconds) for
reporting framerate messages to stderr. For example, if FREEGLUT_FPS
is set to 5000, every 5 seconds a message will be printed to stderr
showing the current frame rate. The frame rate is measured by
counting the number of times glutSwapBuffers() is called over the time
interval.
</ul>
<h1>
21.0&nbsp;<a NAME="ImplementationNotes"></a> Implementation Notes</h1>