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<h1>Class CL_ProgramObject</h1>
<p> OpenGL Program Object <a href="#description">More...</a></p>
<p>Derived from:
<i>none</i>
<br>
Derived by:
<i>none</i>
<br>Group: GL (Display 3D)</p>
<p>
#include <ClanLib/gl.h>
<p>
<table border=0 width=100%>
</table>
<p><b>Construction:</b></p>
<table border=0 width=100%>
<tr><td width=30% valign=top><p><a href="CL_ProgramObject__CL_ProgramObject.html">CL_ProgramObject</a></p></td><td valign=top><p> Construct OpenGL program object.</p></td></tr></table>
<p><b>Attributes:</b></p>
<table border=0 width=100%>
<tr><td width=30% valign=top><p><a href="CL_ProgramObject__get_handle.html">get_handle</a></p></td><td valign=top><p> Returns the OpenGL program object handle.</p></td></tr><tr><td width=30% valign=top><p><a href="CL_ProgramObject__get_link_status.html">get_link_status</a></p></td><td valign=top><p> Returns true if the link succeeded.</p></td></tr><tr><td width=30% valign=top><p><a href="CL_ProgramObject__get_validate_status.html">get_validate_status</a></p></td><td valign=top><p> Returns true if validation succeeded.</p></td></tr><tr><td width=30% valign=top><p><a href="CL_ProgramObject__get_shaders.html">get_shaders</a></p></td><td valign=top><p> Returns the shaders attached to the program object. </p></td></tr><tr><td width=30% valign=top><p><a href="CL_ProgramObject__get_info_log.html">get_info_log</a></p></td><td valign=top><p> Returns the current info log for the program object.</p></td></tr><tr><td width=30% valign=top><p><a href="CL_ProgramObject__get_attribute_count.html">get_attribute_count</a></p></td><td valign=top><p> Returns the count of active attributes.</p></td></tr><tr><td width=30% valign=top><p><a href="CL_ProgramObject__get_attributes.html">get_attributes</a></p></td><td valign=top><p> Returns the active attributes.</p></td></tr><tr><td width=30% valign=top><p><a href="CL_ProgramObject__get_attribute_location.html">get_attribute_location</a></p></td><td valign=top><p> Returns the location of a named active attribute.</p></td></tr><tr><td width=30% valign=top><p><a href="CL_ProgramObject__get_uniform_count.html">get_uniform_count</a></p></td><td valign=top><p> Returns the count of active uniform variables.</p></td></tr><tr><td width=30% valign=top><p><a href="CL_ProgramObject__has_uniform.html">has_uniform</a></p></td><td valign=top><p> Returns true if the uniform variable is present in the program.</p></td></tr><tr><td width=30% valign=top><p><a href="CL_ProgramObject__get_uniforms.html">get_uniforms</a></p></td><td valign=top><p> Returns a list of the active uniforms.</p></td></tr><tr><td width=30% valign=top><p><a href="CL_ProgramObject__get_uniform_location.html">get_uniform_location</a></p></td><td valign=top><p> Returns the location of a named uniform variable.</p></td></tr></table>
<p><b>Operations:</b></p>
<table border=0 width=100%>
<tr><td width=30% valign=top><p><a href="CL_ProgramObject__attach.html">attach</a></p></td><td valign=top><p> Add shader to program object.</p></td></tr><tr><td width=30% valign=top><p><a href="CL_ProgramObject__detach.html">detach</a></p></td><td valign=top><p> Remove shader from program object.</p></td></tr><tr><td width=30% valign=top><p><a href="CL_ProgramObject__bind_attribute_location.html">bind_attribute_location</a></p></td><td valign=top><p> Bind attribute to specific location.</p></td></tr><tr><td width=30% valign=top><p><a href="CL_ProgramObject__link.html">link</a></p></td><td valign=top><p> Link program.</p></td></tr><tr><td width=30% valign=top><p><a href="CL_ProgramObject__validate.html">validate</a></p></td><td valign=top><p> Validate program.</p></td></tr><tr><td width=30% valign=top><p><a href="CL_ProgramObject__use.html">use</a></p></td><td valign=top><p> Start using the shader.</p></td></tr><tr><td width=30% valign=top><p><a href="CL_ProgramObject__disable.html">disable</a></p></td><td valign=top><p> Stop using the shader.</p></td></tr><tr><td width=30% valign=top><p><a href="CL_ProgramObject__set_uniform.html">set_uniform</a></p></td><td valign=top><p> Set uniform variable(s).</p></td></tr><tr><td width=30% valign=top><p><a href="CL_ProgramObject__set_uniform_matrix.html">set_uniform_matrix</a></p></td><td valign=top><p> Set uniform matrices.</p></td></tr></table>
<a name="#description"><p><b>Detailed description:</b></p>
<p>The shader objects that are to be used by programmable stages of
OpenGL are collected together to form a program object. CL_ProgramObject
is ClanLib's C++ interface to OpenGL program objects.</p>
<p>To construct a program object programatically, the procedure is
as follows:</p>
<pre>
CL_ShaderObject vertex_shader(cl_shadertype_vertex, vertex_glsl_sourcecode);
CL_ShaderObject fragment_shader(cl_shadertype_fragment, fragment_glsl_sourcecode);
CL_ProgramObject program;
program.attach(vertex_shader);
program.attach(fragment_shader);
program.link();
</pre>
<p>For more information about program objects, see the OpenGL 2.0
specification at <a href="http://www.opengl.org">www.opengl.org</a>. Documentation
about the OpenGL Shader Language (GLSL) is also available from www.opengl.org.</p>
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