Basic engine shaders test

This patch adds shader compilation tests for the basic engine in `shaders_test.cc`

Addresses T92701

Reviewed By: jbakker

Differential Revision: https://developer.blender.org/D13066

source/blender/draw/engines/basic/basic_private.h

@@ -0,0 +1,35 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * Copyright 2020, Blender Foundation.
+ */
+
+/** \file
+ * \ingroup draw_engine
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+GPUShader *BASIC_shaders_depth_sh_get(eGPUShaderConfig config);
+GPUShader *BASIC_shaders_pointcloud_depth_sh_get(eGPUShaderConfig config);
+GPUShader *BASIC_shaders_depth_conservative_sh_get(eGPUShaderConfig config);
+GPUShader *BASIC_shaders_pointcloud_depth_conservative_sh_get(eGPUShaderConfig config);
+void BASIC_shaders_free(void);
+
+#ifdef __cplusplus
+}
+#endif