DrawEngine: Shader Test Suite

A test case that compiles all the GLSL shaders for workbench, gpencil, overlay and some
of eevee. Compilation is still platform dependent, but when run on a test-farm
with different hardware we will be able to detect GLSL compilation
errors early on.

The test will be compiled when `WITH_GTEST` and `WITH_OPENGL_DRAW_TESTS`
are On.

For eevee only the shaders inside eevee_shaders.c are included. EEVEE has some shaders
located inside the submodule. They aren't accessible to the outside and aren't added
to the test case. We should see how we want to add them. For the test cases it is better
to move them to eevee_shaders.c, but for eevee perspective it is better to keep them in
the submodule. Keeping them in the submodule could lead to situations that is harder to test.
as the shader could already have been initialized.

Reviewed By: Clément Foucault

Differential Revision: https://developer.blender.org/D8667

1 files changed, 39 insertions, 0 deletions

diff --git a/source/blender/draw/intern/draw_manager_testing.h b/source/blender/draw/intern/draw_manager_testing.h
new file mode 100644
index 00000000000..f8b5dd5af46
--- /dev/null
+++ b/source/blender/draw/intern/draw_manager_testing.h
@@ -0,0 +1,39 @@
+/*
+ * 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 2016, Blender Foundation.
+ */
+
+/** \file
+ * \ingroup draw
+ */
+
+/* Internal API only for test cases. */
+
+#pragma once
+
+#include "GPU_shader.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef WITH_OPENGL_DRAW_TESTS
+void DRW_draw_state_init_gtests(eGPUShaderConfig sh_cfg);
+#endif
+
+#ifdef __cplusplus
+}
+#endif