- add 3rd party vulkan dependencies

- add stubs for a vulkan hw renderer backend
- add RAII wrappers for vulkan object types
- add builder classes to isolate vulkan boilerplate code
- add a swap chain class

src/rendering/vulkan/system/vk_framebuffer.cpp

@@ -0,0 +1,163 @@
+// 
+//---------------------------------------------------------------------------
+//
+// Copyright(C) 2010-2016 Christoph Oelckers
+// All rights reserved.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 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 Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see http://www.gnu.org/licenses/
+//
+//--------------------------------------------------------------------------
+//
+
+#include "volk/volk.h"
+
+#include "v_video.h"
+#include "m_png.h"
+#include "templates.h"
+#include "r_videoscale.h"
+#include "actor.h"
+
+#include "hwrenderer/utility/hw_clock.h"
+#include "hwrenderer/utility/hw_vrmodes.h"
+
+#include "vk_framebuffer.h"
+#include "vulkan/textures/vk_samplers.h"
+
+EXTERN_CVAR(Bool, vid_vsync)
+EXTERN_CVAR(Bool, r_drawvoxels)
+EXTERN_CVAR(Int, gl_tonemap)
+
+VulkanFrameBuffer::VulkanFrameBuffer(void *hMonitor, bool fullscreen, VulkanDevice *dev) : 
+	Super(hMonitor, fullscreen) 
+{
+	//screen = this;	// temporary hack to make the tutorial code work.
+
+	device = dev;
+	mSamplerManager = new VkSamplerManager(device);
+	SetViewportRects(nullptr);
+}
+
+VulkanFrameBuffer::~VulkanFrameBuffer()
+{
+	delete mSamplerManager;
+}
+
+void VulkanFrameBuffer::InitializeState()
+{
+}
+
+void VulkanFrameBuffer::Update()
+{
+	twoD.Reset();
+	Flush3D.Reset();
+
+	DrawRateStuff();
+	Flush3D.Clock();
+	//vulkantest_tick();
+	Flush3D.Unclock();
+
+	Swap();
+	CheckBench();
+
+	int initialWidth = GetClientWidth();
+	int initialHeight = GetClientHeight();
+	int clientWidth = ViewportScaledWidth(initialWidth, initialHeight);
+	int clientHeight = ViewportScaledHeight(initialWidth, initialHeight);
+	if (clientWidth > 0 && clientHeight > 0 && (GetWidth() != clientWidth || GetHeight() != clientHeight))
+	{
+		SetVirtualSize(clientWidth, clientHeight);
+		V_OutputResized(clientWidth, clientHeight);
+		//GLRenderer->mVBO->OutputResized(clientWidth, clientHeight);
+	}
+}
+
+void VulkanFrameBuffer::WriteSavePic(player_t *player, FileWriter *file, int width, int height)
+{
+	if (!V_IsHardwareRenderer())
+		Super::WriteSavePic(player, file, width, height);
+}
+
+sector_t *VulkanFrameBuffer::RenderView(player_t *player)
+{
+	return nullptr;
+}
+
+uint32_t VulkanFrameBuffer::GetCaps()
+{
+	if (!V_IsHardwareRenderer())
+		return Super::GetCaps();
+
+	// describe our basic feature set
+	ActorRenderFeatureFlags FlagSet = RFF_FLATSPRITES | RFF_MODELS | RFF_SLOPE3DFLOORS |
+		RFF_TILTPITCH | RFF_ROLLSPRITES | RFF_POLYGONAL | RFF_MATSHADER | RFF_POSTSHADER | RFF_BRIGHTMAP;
+	if (r_drawvoxels)
+		FlagSet |= RFF_VOXELS;
+
+	if (gl_tonemap != 5) // not running palette tonemap shader
+		FlagSet |= RFF_TRUECOLOR;
+
+	return (uint32_t)FlagSet;
+}
+
+void VulkanFrameBuffer::Swap()
+{
+	//vulkantest_present();
+}
+
+void VulkanFrameBuffer::SetVSync(bool vsync)
+{
+}
+
+void VulkanFrameBuffer::CleanForRestart()
+{
+}
+
+FModelRenderer *VulkanFrameBuffer::CreateModelRenderer(int mli) 
+{
+	return nullptr;
+}
+
+IDataBuffer *VulkanFrameBuffer::CreateDataBuffer(int bindingpoint, bool ssbo)
+{
+	return nullptr;
+}
+
+IShaderProgram *VulkanFrameBuffer::CreateShaderProgram() 
+{ 
+	return nullptr;
+}
+
+void VulkanFrameBuffer::UnbindTexUnit(int no)
+{
+}
+
+void VulkanFrameBuffer::TextureFilterChanged()
+{
+}
+
+void VulkanFrameBuffer::BlurScene(float amount)
+{
+}
+
+void VulkanFrameBuffer::UpdatePalette()
+{
+}
+
+void VulkanFrameBuffer::BeginFrame()
+{
+}
+
+void VulkanFrameBuffer::Draw2D()
+{
+}