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Matharoo"><meta name="topic-comment" content="Reference for the function gpu_get_blendequation"><meta name="rh-index-keywords" content="gpu_get_blendequation"><meta name="search-keywords" content="gpu_get_blendequation"><meta name="is_pure" content="true"></head><body><div class="topic-header rh-hide" id="rh-topic-header"><div class="logo"></div><div class="nav"><div class="title" title="gpu_get_blendequation"><span>gpu_get_blendequation</span></div><div class="gotohome" title="Click here to see this page in full context"><a href="#" onclick="rh._.goToFullLayout()">Click here to see this page in full context</a></div></div></div><div class="topic-header-shadow rh-hide" id="rh-topic-header-shadow"></div><h1><span data-field="title" data-format="default">gpu_get_blendequation</span></h1><p>This function can be used to retrieve the current <a href="gpu_set_blendequation.htm">blend equation</a> being used for drawing. The returned value will be one of the following constants (the default value is <span class="inline2">bm_eq_add</span>):</p><div data-conref="../../../../assets/snippets/Table_Gpu_blend_equations.hts"><table><colgroup><col><col><col></colgroup><tbody><tr><th colspan="3"><span data-keyref="Type_Constant_Draw_Blend_Mode_Equation"><a target="_blank" href="gpu_set_blendequation.htm">Blend Mode Equation Constant</a></span></th></tr><tr><th>Constant</th><th>Description</th><th>Equation</th></tr><tr><td><span class="inline">bm_eq_add</span></td><td>Add both together (the default equation).</td><td>source + destination</td></tr><tr><td><span class="inline">bm_eq_subtract</span></td><td>Subtract source from destination.</td><td>destination - source</td></tr><tr><td><span class="inline">bm_eq_reverse_subtract</span></td><td>Subtract destination from source.</td><td>source - destination</td></tr><tr><td><span class="inline">bm_eq_min</span></td><td>Use whichever value is smaller.</td><td>min(source, destination)</td></tr><tr><td><span class="inline">bm_eq_max</span></td><td>Use whichever value is larger.</td><td>max(source, destination)</td></tr></tbody></table><p class="note"><span data-conref="../../../../assets/snippets/Tag_important.hts"><span class="important">IMPORTANT</span></span> <a href="gpu_set_blendmode_ext.htm">Blend factors</a> are not applied when <span class="inline2">bm_eq_min</span> or <span class="inline2">bm_eq_max</span> is used as the blend equation, which is effectively the same as using <span class="inline2">bm_one</span> as the factors.</p></div><p> </p><h4>Syntax:</h4><p class="code"><span data-field="title" data-format="default">gpu_get_blendequation</span>();</p><p> </p><h4>Returns:</h4><p class="code"><span data-keyref="Type_Constant_Draw_Blend_Mode_Equation"><a target="_blank" href="gpu_set_blendequation.htm">Blend Mode Equation Constant</a></span> (see above for constants)</p><p> </p><h4>Example:</h4><p class="code">if (gpu_get_blendequation() != bm_eq_add)<br>{<br> gpu_set_blendequation(bm_eq_add);<br>}</p><p>The above code gets the current blend equation and if it is not <span class="inline2">bm_eq_add</span> it is set to that constant.</p><p> </p><p> </p><p> </p><div class="footer"><div class="buttons"><div class="clear"><div style="float:left">Back: <a href="GPU_Control.htm">GPU Control</a></div><div style="float:right">Next: <a href="gpu_get_alphatestenable.htm">gpu_get_alphatestenable</a></div></div></div><h5><span data-keyref="Copyright Notice">© Copyright YoYo Games Ltd. 2024 All Rights Reserved</span></h5></div></body></html>
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