Created partial functionality to render a texture to swapchain image

Assets/Shaders/ToSwapchain_FS.glsl

@@ -0,0 +1,19 @@
+#version 450
+#extension GL_ARB_separate_shader_objects : enable
+#extension GL_ARB_shading_language_420pack : enable
+#extension GL_EXT_nonuniform_qualifier : require
+
+layout (input_attachment_index = 0, set = 4, binding = 0) uniform subpassInput vec4 sceneTexture;
+
+layout(location = 0) in struct
+{
+  vec2 uv; // location = 0
+
+} In;
+
+layout(location = 0) out vec4 fragColor;
+
+void main()
+{
+  fragColor = vec4 (texture (sceneTexture, In.uv).rgb, 1.0f);
+}

Assets/Shaders/ToSwapchain_VS.glsl

@@ -0,0 +1,21 @@
+#version 450
+#extension GL_KHR_vulkan_glsl : enable
+
+layout(location = 0) out struct
+{
+  vec2 uv; // location = 0
+
+} Out;
+
+vec2 CreateQuad(in uint vertexID)
+{
+  uint b = 1 << vertexID;
+  return vec2 ((0x3 & b) != 0, (0x9 & b) != 0);
+}
+
+void main()
+{
+  vec2 texCoord = CreateQuad (gl_VertexIndex);
+  vec2 vertexPos = texCoord - vec2(0.5f);
+  gl_Position = vec4 (vertexPos, 0.0f, 1.0f);
+}

SHADE_Application/src/Application/SBApplication.cpp

@@ -161,19 +161,24 @@ namespace Sandbox
   void SBApplication::Update(void)
   {
     SHGraphicsSystem* graphicsSystem = SHADE::SHSystemManager::GetSystem<SHGraphicsSystem>();
+
+#ifdef SHEDITOR
     SHEditor* editor = SHADE::SHSystemManager::GetSystem<SHEditor>();
+#endif
+
     //TODO: Change true to window is open
     while (!window.WindowShouldClose())
     {
       SHFrameRateController::UpdateFRC();
       SHInputManager::UpdateInput(SHFrameRateController::GetRawDeltaTime());
       SHSceneManager::UpdateSceneManager();
+
 #ifdef SHEDITOR
       if(editor->editorState == SHEditor::State::PLAY)
         SHSceneManager::SceneUpdate(0.016f);
-#endif
       SHSystemManager::RunRoutines(editor->editorState != SHEditor::State::PLAY, 0.016f);
       editor->PollPicking();
+#endif
 
       static bool drawColliders = false;
       if (SHInputManager::GetKeyDown(SHInputManager::SH_KEYCODE::F10))

SHADE_Engine/src/Graphics/MiddleEnd/Interface/SHGraphicsSystem.cpp

@@ -283,6 +283,7 @@ namespace SHADE
     screenRenderGraph->Init("Scene Render Graph", device, swapchain, &resourceManager);
     screenRenderGraph->LinkNonOwningResource(worldRenderGraph, "Scene");
     screenRenderGraph->LinkNonOwningResource(worldRenderGraph, "Entity ID");
+    screenRenderGraph->AddResource("Present", { SH_RENDER_GRAPH_RESOURCE_FLAGS::COLOR_PRESENT }, windowDims.first, windowDims.second);
 
     auto screenSpaceNode = screenRenderGraph->AddNode("Screen Space Pass", { "Scene", "Entity ID"}, {});
     auto uiSubpass = screenSpaceNode->AddSubpass("UI");
@@ -300,6 +301,7 @@ namespace SHADE
       dummySubpass->AddInput("Scene");
     }
 
+    //screenRenderGraph->AddRenderToSwapchainNode ("Scene", "Present", )
 
     screenRenderGraph->Generate();
 
@@ -1011,7 +1013,11 @@ namespace SHADE
     renderContext.HandleResize();
 
     worldRenderGraph->HandleResize(resizeWidth, resizeHeight);
+
+#ifdef SHEDITOR
     editorRenderGraph->HandleResize(windowDims.first, windowDims.second);
+#endif
+
     screenRenderGraph->HandleResize(resizeWidth, resizeHeight);
 
     mousePickSystem->HandleResize();

SHADE_Engine/src/Graphics/RenderGraph/SHRenderGraph.cpp

@@ -12,6 +12,8 @@
 #include "SHRenderGraphStorage.h"
 #include "Graphics/RenderGraph/SHRenderGraphNodeCompute.h"
 #include "Tools/Utilities/SHUtilities.h"
+#include "Graphics/MiddleEnd/GlobalData/SHGraphicsGlobalData.h"
+#include "Graphics/RenderGraph/SHRenderToSwapchainImageSystem.h" 
 
 namespace SHADE
 {
@@ -385,6 +387,12 @@ namespace SHADE
     }
   }
 
+  void SHRenderGraph::ConfigureSubSystems(void) noexcept
+  {
+    if (renderToSwapchainImageSystem)
+      renderToSwapchainImageSystem->ConstructPipelines(renderGraphStorage->logicalDevice);
+  }
+
   /***************************************************************************/
   /*!
 
@@ -536,6 +544,33 @@ namespace SHADE
     return node;
   }
 
+  void SHRenderGraph::AddRenderToSwapchainNode(std::string toSwapchainResource, std::string swapchainResource, std::initializer_list<std::string> predecessorNodes, std::pair<Handle<SHVkShaderModule>, Handle<SHVkShaderModule>> shaderModules) noexcept
+  {
+    for (auto& node : predecessorNodes)
+    {
+    	if (!nodeIndexing.contains(node))
+        return;
+    }
+
+    if (renderGraphStorage->graphResources->contains(toSwapchainResource) && renderGraphStorage->graphResources->contains(swapchainResource))
+    {
+      auto newNode = AddNode("Render To Present", { ResourceInstruction (toSwapchainResource.c_str()), ResourceInstruction(swapchainResource.c_str()) }, predecessorNodes);
+      auto newSubpass = newNode->AddSubpass("Render");
+      newSubpass->AddColorOutput(swapchainResource);
+      newSubpass->AddInput(toSwapchainResource);
+
+      renderToSwapchainImageSystem = renderGraphStorage->resourceHub->Create<SHRenderToSwapchainImageSystem> (newNode, newSubpass, shaderModules);
+
+      newSubpass->AddExteriorDrawCalls([=](Handle<SHVkCommandBuffer>& cmdBuffer, uint32_t frameIndex)
+        {
+          cmdBuffer->BindPipeline(renderToSwapchainImageSystem->GetPipeline());
+          
+          // draw a quad.
+          cmdBuffer->DrawIndexed(4, 0, 0);
+        });
+    }
+  }
+
   /***************************************************************************/
   /*!
 
@@ -556,6 +591,7 @@ namespace SHADE
     ConfigureSubpasses();
     ConfigureRenderpasses();
     ConfigureFramebuffers();
+    ConfigureSubSystems();
   }
 
   /***************************************************************************/

SHADE_Engine/src/Graphics/RenderGraph/SHRenderGraph.h

@@ -32,6 +32,7 @@ namespace SHADE
   class SHGraphicsGlobalData;
   class SHVkDescriptorPool;
   class SHRenderGraphStorage;
+  class SHRenderToSwapchainImageSystem;
 
   class SH_API SHRenderGraph
   {
@@ -52,6 +53,7 @@ namespace SHADE
     void ConfigureAttachmentDescriptions (void) noexcept;
     void ConfigureSubpasses              (void) noexcept;
     void ConfigureRenderpasses           (void) noexcept;
+    void ConfigureSubSystems             (void) noexcept;
     void ConfigureFramebuffers           (void) noexcept;
 
     /*-----------------------------------------------------------------------*/
@@ -69,6 +71,9 @@ namespace SHADE
     //! Name of the RenderGraph
     std::string name;
 
+    //! For rendering onto the swapchain
+    Handle<SHRenderToSwapchainImageSystem> renderToSwapchainImageSystem;
+
   public:
     /*-----------------------------------------------------------------------*/
     /* CTORS AND DTORS                                                       */
@@ -85,6 +90,7 @@ namespace SHADE
     void                      AddResource(std::string resourceName, std::initializer_list<SH_RENDER_GRAPH_RESOURCE_FLAGS> typeFlags, uint32_t w = static_cast<uint32_t>(-1), uint32_t h = static_cast<uint32_t>(-1), vk::Format format = vk::Format::eB8G8R8A8Unorm, uint8_t levels = 1, vk::ImageUsageFlagBits usageFlags = {}, vk::ImageCreateFlagBits createFlags = {});
     void                      LinkNonOwningResource (Handle<SHRenderGraph> resourceOrigin, std::string resourceName) noexcept;
     Handle<SHRenderGraphNode> AddNode (std::string nodeName, std::initializer_list<ResourceInstruction> resourceInstruction, std::initializer_list<std::string> predecessorNodes) noexcept;
+    void                      AddRenderToSwapchainNode (std::string toSwapchainResource, std::string swapchainResource, std::initializer_list<std::string> predecessorNodes, std::pair<Handle<SHVkShaderModule>, Handle<SHVkShaderModule>> shaderModules) noexcept;
     
     void                      Generate             (void) noexcept;
     void                      CheckForNodeComputes (void) noexcept;

SHADE_Engine/src/Graphics/RenderGraph/SHRenderToSwapchainImageSystem.cpp

@@ -0,0 +1,44 @@
+#include "SHpch.h"
+#include "SHRenderToSwapchainImageSystem.h"
+#include "Graphics/Devices/SHVkLogicalDevice.h"
+#include "Graphics/MiddleEnd/GlobalData/SHGraphicsGlobalData.h"
+#include "Graphics/RenderGraph/SHRenderGraphNode.h"
+
+namespace SHADE
+{
+  
+  SHRenderToSwapchainImageSystem::SHRenderToSwapchainImageSystem(Handle<SHRenderGraphNode> node, Handle<SHSubpass> subpass, std::pair<Handle<SHVkShaderModule>, Handle<SHVkShaderModule>> shaders) noexcept
+    : renderGraphNode {node}
+    , subpass{subpass}
+    , shaderModules{shaders}
+    , pipeline{}
+    , pipelineLayout{}
+  {
+    
+  }
+
+  void SHRenderToSwapchainImageSystem::ConstructPipelines(Handle<SHVkLogicalDevice> logicalDevice) noexcept
+  {
+    auto pipelineLayout = logicalDevice->CreatePipelineLayout(SHPipelineLayoutParams
+      {
+        .shaderModules = {shaderModules.first, shaderModules.second},
+        .globalDescSetLayouts = SHGraphicsGlobalData::GetDescSetLayouts(),
+      });
+
+    auto newPipeline = logicalDevice->CreateGraphicsPipeline(pipelineLayout, nullptr, renderGraphNode->GetRenderpass(), subpass);
+
+    SHInputAssemblyState inputAssembly{};
+    inputAssembly.topology = vk::PrimitiveTopology::eTriangleFan;
+
+    newPipeline->GetPipelineState().SetInputAssemblyState(inputAssembly);
+
+    newPipeline->ConstructPipeline();
+
+  }
+
+  Handle<SHVkPipeline> SHRenderToSwapchainImageSystem::GetPipeline(void) const noexcept
+  {
+    return pipeline;
+  }
+
+}

SHADE_Engine/src/Graphics/RenderGraph/SHRenderToSwapchainImageSystem.h

@@ -0,0 +1,43 @@
+#pragma once
+
+#include "Resource/SHHandle.h"
+#include <utility>
+
+namespace SHADE
+{
+  class SHVkPipeline;
+  class SHVkPipelineLayout;
+  class SHVkShaderModule;
+  class SHRenderGraphNode;
+  class SHSubpass;
+  class SHVkLogicalDevice;
+  class SHSubpass;
+
+
+  class SHRenderToSwapchainImageSystem
+  {
+  private:
+    //! Render Graph node to get the renderpass from to initialize the pipeline
+    Handle<SHRenderGraphNode> renderGraphNode;
+
+    //! Subpass to initialize the pipeline with
+    Handle<SHSubpass> subpass;
+
+    //! Shader module required to render the quad on screen
+    std::pair<Handle<SHVkShaderModule>, Handle<SHVkShaderModule>> shaderModules;
+
+    //! pipeline required to draw the image
+    Handle<SHVkPipeline> pipeline;
+
+    //! Pipeline layout of the pipeline
+    Handle<SHVkPipelineLayout> pipelineLayout;
+  	
+  public:
+    SHRenderToSwapchainImageSystem (Handle<SHRenderGraphNode> node, Handle<SHSubpass> subpass, std::pair<Handle<SHVkShaderModule>, Handle<SHVkShaderModule>> shaders) noexcept;
+
+    void ConstructPipelines (Handle<SHVkLogicalDevice> logicalDevice) noexcept;
+
+    Handle<SHVkPipeline> GetPipeline (void) const noexcept;
+
+  };
+}