GPU: Extract GPU Base Test case

The draw manager test case initialized ghost, gpu and draw manager. This
change splits the base test case to GPU specific and draw manager
specific test case.

The GPU test base test case will be used for low level GPU tests.

source/blender/draw/CMakeLists.txt

@@ -437,9 +437,9 @@ if(WITH_GTESTS)
     )
     set(TEST_INC
       "../../../intern/ghost/"
+      "../gpu/tests/"
     )
     set(TEST_LIB
-      bf_draw
     )
     include(GTestTesting)
     blender_add_test_lib(bf_draw_tests "${TEST_SRC}" "${INC};${TEST_INC}" "${INC_SYS}" "${LIB};${TEST_LIB}")

source/blender/draw/tests/shaders_test.cc

@@ -7,41 +7,22 @@
 #include "GPU_context.h"
 #include "GPU_init_exit.h"
 #include "GPU_shader.h"
-
-#include "GHOST_C-api.h"
+#include "gpu_testing.hh"
 
 #include "engines/eevee/eevee_private.h"
 #include "engines/gpencil/gpencil_engine.h"
 #include "engines/overlay/overlay_private.h"
 #include "engines/workbench/workbench_private.h"
 
-namespace blender::draw::tests {
+namespace blender::draw {
 
 /* Base class for draw test cases. It will setup and tear down the GPU part around each test. */
-class DrawTest : public ::testing::Test {
- private:
-  GHOST_SystemHandle ghost_system;
-  GHOST_ContextHandle ghost_context;
-  GPUContext *context;
-
+class DrawTest : public blender::gpu::GPUTest {
   void SetUp() override
   {
-    GHOST_GLSettings glSettings = {0};
-    ghost_system = GHOST_CreateSystem();
-    ghost_context = GHOST_CreateOpenGLContext(ghost_system, glSettings);
-    context = GPU_context_create(NULL);
-    GPU_init();
+    GPUTest::SetUp();
     DRW_draw_state_init_gtests(GPU_SHADER_CFG_DEFAULT);
   }
-
-  void TearDown() override
-  {
-    GPU_exit();
-    GPU_backend_exit();
-    GPU_context_discard(context);
-    GHOST_DisposeOpenGLContext(ghost_system, ghost_context);
-    GHOST_DisposeSystem(ghost_system);
-  }
 };
 
 TEST_F(DrawTest, workbench_glsl_shaders)
@@ -324,4 +305,4 @@ TEST_F(DrawTest, eevee_glsl_shaders_static)
   EEVEE_shaders_free();
 }
 
-}  // namespace blender::draw::tests
+}  // namespace blender::draw

source/blender/gpu/CMakeLists.txt

@@ -379,3 +379,19 @@ if(WITH_IMAGE_DDS)
 endif()
 
 blender_add_lib(bf_gpu "${SRC}" "${INC}" "${INC_SYS}" "${LIB}")
+
+if(WITH_GTESTS)
+  if(WITH_OPENGL_DRAW_TESTS)
+    set(TEST_SRC
+      tests/gpu_testing.cc
+    )
+    set(TEST_INC
+      "../../../intern/ghost/"
+    )
+    set(TEST_LIB
+
+    )
+    include(GTestTesting)
+    blender_add_test_lib(bf_gpu_tests "${TEST_SRC}" "${INC};${TEST_INC}" "${INC_SYS}" "${LIB};${TEST_LIB}")
+  endif()
+endif()

source/blender/gpu/tests/gpu_testing.cc

@@ -0,0 +1,31 @@
+/* Apache License, Version 2.0 */
+
+#include "testing/testing.h"
+
+#include "GPU_context.h"
+#include "GPU_init_exit.h"
+#include "gpu_testing.hh"
+
+#include "GHOST_C-api.h"
+
+namespace blender::gpu {
+
+void GPUTest::SetUp()
+{
+  GHOST_GLSettings glSettings = {0};
+  ghost_system = GHOST_CreateSystem();
+  ghost_context = GHOST_CreateOpenGLContext(ghost_system, glSettings);
+  context = GPU_context_create(NULL);
+  GPU_init();
+}
+
+void GPUTest::TearDown()
+{
+  GPU_exit();
+  GPU_backend_exit();
+  GPU_context_discard(context);
+  GHOST_DisposeOpenGLContext(ghost_system, ghost_context);
+  GHOST_DisposeSystem(ghost_system);
+}
+
+}  // namespace blender::gpu

source/blender/gpu/tests/gpu_testing.hh

@@ -0,0 +1,27 @@
+#include "testing/testing.h"
+
+#include "GHOST_C-api.h"
+
+struct GPUContext;
+
+namespace blender::gpu {
+
+/* Test class that setups a GPUContext for test cases.
+ *
+ * Usage:
+ *   TEST_F(GPUTest, my_gpu_test) {
+ *     ...
+ *   }
+ */
+class GPUTest : public ::testing::Test {
+ private:
+  GHOST_SystemHandle ghost_system;
+  GHOST_ContextHandle ghost_context;
+  struct GPUContext *context;
+
+ protected:
+  void SetUp() override;
+  void TearDown() override;
+};
+
+}  // namespace blender::gpu