Initial work on Vulkan:

-Added VulkanContext
-Added an X11 implementation
-Added a rendering device abstraction
-added a Vulkan rendering device abstraction
-Engine does not work, only shows Godot logo (run it from bin/)

core/oa_hash_map.h

@@ -240,6 +240,22 @@ class OAHashMap {
 		return false;
 	}
 
+	/**
+	 * returns true if the value was found, false otherwise.
+	 *
+	 * if r_data is not NULL then the value will be written to the object
+	 * it points to.
+	 */
+	TValue *lookup_ptr(const TKey &p_key) const {
+		uint32_t pos = 0;
+		bool exists = _lookup_pos(p_key, pos);
+
+		if (exists) {
+			return &values[pos];
+		}
+		return NULL;
+	}
+
 	_FORCE_INLINE_ bool has(const TKey &p_key) const {
 		uint32_t _pos = 0;
 		return _lookup_pos(p_key, _pos);

drivers/SCsub

@@ -26,6 +26,7 @@ SConscript('winmidi/SCsub')
 if (env["platform"] != "server"):
     SConscript('gles3/SCsub')
     SConscript('gles2/SCsub')
+    SConscript('vulkan/SCsub')
     SConscript('gl_context/SCsub')
 else:
     SConscript('dummy/SCsub')

drivers/dummy/rasterizer_dummy.h

@@ -793,7 +793,7 @@ class RasterizerDummy : public Rasterizer {
 	void clear_render_target(const Color &p_color) {}
 	void blit_render_target_to_screen(RID p_render_target, const Rect2 &p_screen_rect, int p_screen = 0) {}
 	void output_lens_distorted_to_screen(RID p_render_target, const Rect2 &p_screen_rect, float p_k1, float p_k2, const Vector2 &p_eye_center, float p_oversample) {}
-	void end_frame(bool p_swap_buffers) {}
+	void end_frame(bool p_swap_buffers) { OS::get_singleton()->swap_buffers(); }
 	void finalize() {}
 
 	static Error is_viable() {

drivers/vulkan/SCsub

@@ -0,0 +1,66 @@
+#!/usr/bin/env python
+
+Import('env')
+
+env.add_source_files(env.drivers_sources,"*.cpp")
+
+# Thirdparty source files
+# Not unbundled so far since not widespread as shared library
+thirdparty_dir = "#thirdparty/glslang/"
+thirdparty_sources = [
+"glslang/MachineIndependent/RemoveTree.cpp",
+"glslang/MachineIndependent/ParseHelper.cpp",
+"glslang/MachineIndependent/iomapper.cpp",
+"glslang/MachineIndependent/propagateNoContraction.cpp",
+"glslang/MachineIndependent/Intermediate.cpp",
+"glslang/MachineIndependent/linkValidate.cpp",
+"glslang/MachineIndependent/attribute.cpp",
+"glslang/MachineIndependent/Scan.cpp",
+"glslang/MachineIndependent/Initialize.cpp",
+"glslang/MachineIndependent/Constant.cpp",
+"glslang/MachineIndependent/reflection.cpp",
+"glslang/MachineIndependent/limits.cpp",
+"glslang/MachineIndependent/preprocessor/PpScanner.cpp",
+"glslang/MachineIndependent/preprocessor/PpTokens.cpp",
+"glslang/MachineIndependent/preprocessor/PpAtom.cpp",
+"glslang/MachineIndependent/preprocessor/PpContext.cpp",
+"glslang/MachineIndependent/preprocessor/Pp.cpp",
+"glslang/MachineIndependent/InfoSink.cpp",
+"glslang/MachineIndependent/intermOut.cpp",
+"glslang/MachineIndependent/SymbolTable.cpp",
+"glslang/MachineIndependent/glslang_tab.cpp",
+"glslang/MachineIndependent/pch.cpp",
+"glslang/MachineIndependent/Versions.cpp",
+"glslang/MachineIndependent/ShaderLang.cpp",
+"glslang/MachineIndependent/parseConst.cpp",
+"glslang/MachineIndependent/PoolAlloc.cpp",
+"glslang/MachineIndependent/ParseContextBase.cpp",
+"glslang/MachineIndependent/IntermTraverse.cpp",
+"glslang/GenericCodeGen/Link.cpp",
+"glslang/GenericCodeGen/CodeGen.cpp",
+"OGLCompilersDLL/InitializeDll.cpp",
+"SPIRV/InReadableOrder.cpp",
+"SPIRV/GlslangToSpv.cpp",
+"SPIRV/SpvBuilder.cpp",
+"SPIRV/SpvTools.cpp",
+"SPIRV/disassemble.cpp",
+"SPIRV/doc.cpp",
+"SPIRV/SPVRemapper.cpp",
+"SPIRV/SpvPostProcess.cpp",
+"SPIRV/Logger.cpp"
+]
+
+if (env["platform"]=="windows"):
+	thirdparty_sources.append("glslang/OSDependent/Windows/ossource.cpp")
+else:
+	thirdparty_sources.append("glslang/OSDependent/Unix/ossource.cpp")
+
+thirdparty_sources = [thirdparty_dir + file for file in thirdparty_sources]
+
+env_thirdparty = env.Clone()
+#env_thirdparty.disable_warnings()
+env_thirdparty.add_source_files(env.drivers_sources, thirdparty_sources)
+
+env.Prepend(CPPPATH=[thirdparty_dir])
+
+#SConscript("shaders/SCsub")