Support dynamic loading of SDL libraries

This is mainly to address old issue when one need to have SDL library installed
in order to use our official builds. Some hip distros already installs SDL,
but it's not quite the same across all the variety of the distros.

We also now switching to SDL-2.0, most of the distros have it in repositories
already, so it shouldn't be huge deal to install it if needed.

Reviewers: campbellbarton

Reviewed By: campbellbarton

Differential Revision: https://developer.blender.org/D878

1 files changed, 37 insertions, 0 deletions

diff --git a/extern/sdlew/include/sdlew.h b/extern/sdlew/include/sdlew.h
new file mode 100644
index 00000000000..dde3d70ab31
--- /dev/null
+++ b/extern/sdlew/include/sdlew.h
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2014 Blender Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+#ifndef __SDL_EW_H__
+#define __SDL_EW_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+enum {
+  SDLEW_SUCCESS = 0,
+  SDLEW_ERROR_OPEN_FAILED = -1,
+  SDLEW_ERROR_ATEXIT_FAILED = -2,
+  SDLEW_ERROR_VERSION = -3,
+};
+
+int sdlewInit(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif  /* __SDL_EW_H__ */