Moved platform specific code to its own directory.

code/platforms/sdl_platform.h

@@ -0,0 +1,28 @@
+#ifndef SDL_PLATFORM_H
+#define SDL_PLATFORM_H
+
+typedef void plugin_update_and_render(plugin_offscreen_buffer *Buffer, plugin_input *Input);
+
+struct sdl_plugin_code
+{
+    time_t LastModificationTime;
+    void *CodeLibrary;
+    plugin_update_and_render *UpdateAndRender;
+};
+
+struct sdl_offscreen_buffer
+{
+    SDL_Texture *Texture;
+    void *Memory;
+    int Width;
+    int Height;
+    int Pitch;
+};
+
+struct sdl_window_dimension
+{
+    int Width;
+    int Height;
+};
+
+#endif