span class="pre"><span class="Identifier">gridDim</span></span></tt></td><td><tt class="docutils literal"><span class="pre"><span class="Identifier">gl_NumWorkGroups</span></span></tt></td><td>The size of the grid (CUDA) or the number of work groups (GLSL)</td></tr>
<tr><td><tt class="docutils literal"><span class="pre"><span class="Identifier">blockIdx</span></span></tt></td><td><tt class="docutils literal"><span class="pre"><span class="Identifier">gl_WorkGroupID</span></span></tt></td><td>The index of th