Implemented Text Rendering

- The Text Renderer Component serialization and reflection onto inspector is not in yet, but there is basic functionality.
- Updated shaders
- Topology for text rendering is changed to triangle fan. Front facing for primitives is clockwise. Vertex state has both the positionOffset and glyphIndex attribute set as instanced.
-  Freetype instance is now initialized in InitBoilerplate
- SHCamera no longer calling SetPerspective/Ortho inside HandleResize
- Font Geometry is now loaded in SHFontLoader into SHFontAsset fontGeometry variable.

Assets/Shaders/Text_FS.glsl

@@ -45,15 +45,14 @@ void main()
   float screenPxDistance = 2 * (sd - 0.5f);
   float opacity = clamp (screenPxDistance + 0.5f, 0.0f, 2.0f);
 
-  vec4 fragColor = vec4 (1.0f);
+  vec4 fragColor;
 
-  if (opacity > 0.02f && opacity < 1.9f)
-  {
-    fragColor = vec4(0.0f, 1.0f, 1.0f, 1.0f);
-  }
-
-  fragColor = mix(vec4(0.0f), vec4(In2.textColor, 1.0f), min (opacity, 1.0f));
+  if (opacity < 0.2f)
+    discard;
+  else
+    fragColor = mix(vec4(0.0f), vec4(In2.textColor, 1.0f), min (opacity, 1.0f));
 
+  // fragColor = vec4 (1.0f);
 
   color = fragColor;
   outEntityID = In2.eid;

Assets/Shaders/Text_VS.glsl

@@ -68,7 +68,7 @@ void main()
 
   // Generate UV coords and vertex positions
   Out.uv = CreateQuad(gl_VertexIndex);
-  vec3 vertexPos = vec3(Out.uv, 1.0f);
+  vec3 vertexPos = vec3(Out.uv, 0.0f);
 
   // Get the local matrices
   mat4 localModel = testPushConstant.worldTransform;
@@ -87,16 +87,15 @@ void main()
   toFontSpace[2][0] = positionalOffset.x;
   toFontSpace[2][1] = positionalOffset.y;
 
-  mat4 PVMatrix = cameraData.vpMat;
-
   // Initialize variables for use in FS
   //characterIndex = gl_InstanceID; 
 
   // Transform the vertices to font space
-  vertexPos = toFontSpace * vertexPos; 
+  vertexPos = toFontSpace * vec3(vertexPos.xy, 1.0f); 
 
   Out2.textColor = testPushConstant.textColor;
 
   // transform the vertex position to font space
-  gl_Position = PVMatrix * localModel * vec4(vertexPos, 1.0f);
+  gl_Position = cameraData.orthoMat * localModel * vec4(vertexPos, 1.0f);
+  // gl_Position = vec4(vertexPos, 1.0f);
 }

SHADE_Application/src/Application/SBApplication.cpp

@@ -141,7 +141,7 @@ namespace Sandbox
     //SHComponentManager::CreateComponentSparseSet<SHCameraComponent>();
 
     SHAssetManager::Load();
-    auto font = SHAssetManager::GetData<SHFontAsset>(176667660);
+    //auto font = SHAssetManager::GetData<SHFontAsset>(176667660);
     
     SHSystemManager::RegisterRoutine<SHAudioSystem, SHAudioSystem::AudioRoutine>();
 

SHADE_Engine/src/Assets/Libraries/Loaders/SHFontLoader.cpp

@@ -22,6 +22,14 @@ namespace SHADE
       return nullptr;
     }
 
+    // Attempt to load font geometry for advance data
+    auto ttfFilePath = path.string();
+    ttfFilePath = ttfFilePath.substr(0, ttfFilePath.find_last_of('.'));
+    ttfFilePath += TTF_EXTENSION.data();
+    msdfgen::FontHandle* fontHandle = nullptr;
+    fontHandle = msdfgen::loadFont(SHFreetypeInstance::GetFreetypeHandle(), ttfFilePath.c_str());
+    newFontAsset->fontGeometry.loadCharset(fontHandle, 1.0f, msdf_atlas::Charset::ASCII);
+
     uint32_t numGlyphs = 0;
 
     // read how many glyphs we have

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

@@ -117,6 +117,8 @@ namespace SHADE
     // Create generic command buffer
     graphicsCmdPool = device->CreateCommandPool(SH_QUEUE_FAMILY_ARRAY_INDEX::GRAPHICS, SH_CMD_POOL_RESET::POOL_BASED, true);
 
+    SHFreetypeInstance::Init();
+
     SHAssetManager::CompileAsset("../../Assets/Shaders/Text_VS.glsl", false);
     SHAssetManager::CompileAsset("../../Assets/Shaders/Text_FS.glsl", false);
     SHAssetManager::CompileAsset("../../Assets/Shaders/TestCube_VS.glsl", false);
@@ -379,7 +381,6 @@ namespace SHADE
         screenRenderer->BindDescSet(cmdBuffer, frameIndex);
       });
 
-    SHFreetypeInstance::Init();
   }
 
   void SHGraphicsSystem::InitBuiltInResources(void)
@@ -1041,7 +1042,8 @@ namespace SHADE
     worldViewport->SetWidth(static_cast<float>(resizeWidth));
     worldViewport->SetHeight(static_cast<float>(resizeHeight));
 
-    worldCamera->SetPerspective(90.0f, static_cast<float>(resizeWidth), static_cast<float>(resizeHeight), 0.0f, 100.0f);
+    //worldCamera->SetPerspective(90.0f, static_cast<float>(resizeWidth), static_cast<float>(resizeHeight), 0.0f, 100.0f);
+    //screenCamera->SetOrthographic(static_cast<float>(resizeWidth), static_cast<float>(resizeHeight), 0.01f, 100.0f);
 
     auto cameraSystem = SHSystemManager::GetSystem<SHCameraSystem>();
 #ifdef SHEDITOR
@@ -1053,8 +1055,6 @@ namespace SHADE
 
     for (auto& semaHandle : graphSemaphores)
       semaHandle = device->CreateSemaphore();
-
-
   }
   
   void SHGraphicsSystem::AwaitGraphicsExecution()

SHADE_Engine/src/Graphics/MiddleEnd/TextRendering/SHTextRendererComponent.cpp

@@ -24,7 +24,7 @@ namespace SHADE
   /***************************************************************************/
   void SHTextRendererComponent::OnCreate(void)
   {
-    text = "Text";
+    text = "My name is Brandon.";
     requiresRecompute = true;
 
     // Default white color.

SHADE_Engine/src/Graphics/MiddleEnd/TextRendering/SHTextRenderingSubSystem.cpp

@@ -16,7 +16,7 @@ namespace SHADE
 {
   void SHTextRenderingSubSystem::RecomputePositions(SHTextRendererComponent& textComp) noexcept
   {
-    if (textComp.text.empty() || textComp.fontHandle)
+    if (textComp.text.empty() || !textComp.fontHandle)
       return;
 
     // Create the buffer 
@@ -24,7 +24,7 @@ namespace SHADE
       textComp.indexingDataBuffer = logicalDevice->CreateBuffer(SHTextRendererComponent::MAX_CHARACTERS * sizeof(uint32_t), nullptr, SHTextRendererComponent::MAX_CHARACTERS * sizeof(uint32_t), vk::BufferUsageFlagBits::eVertexBuffer, VMA_MEMORY_USAGE_AUTO, VMA_ALLOCATION_CREATE_HOST_ACCESS_SEQUENTIAL_WRITE_BIT | VMA_ALLOCATION_CREATE_MAPPED_BIT);
 
     if (!textComp.charPositionDataBuffer)
-      textComp.indexingDataBuffer = logicalDevice->CreateBuffer(SHTextRendererComponent::MAX_CHARACTERS * sizeof(SHVec4), nullptr, SHTextRendererComponent::MAX_CHARACTERS * sizeof(SHVec4), vk::BufferUsageFlagBits::eVertexBuffer, VMA_MEMORY_USAGE_AUTO, VMA_ALLOCATION_CREATE_HOST_ACCESS_SEQUENTIAL_WRITE_BIT | VMA_ALLOCATION_CREATE_MAPPED_BIT);
+      textComp.charPositionDataBuffer = logicalDevice->CreateBuffer(SHTextRendererComponent::MAX_CHARACTERS * sizeof(SHVec4), nullptr, SHTextRendererComponent::MAX_CHARACTERS * sizeof(SHVec4), vk::BufferUsageFlagBits::eVertexBuffer, VMA_MEMORY_USAGE_AUTO, VMA_ALLOCATION_CREATE_HOST_ACCESS_SEQUENTIAL_WRITE_BIT | VMA_ALLOCATION_CREATE_MAPPED_BIT);
 
     // For indexing font transformation in the shader
     std::vector <SHTextRendererComponent::TextIndexingType> indexingData;
@@ -115,8 +115,8 @@ namespace SHADE
     SHVertexInputState vertexInputState;
 
     // Configure vertex attributes
-    vertexInputState.AddBinding(false, false, { SHVertexAttribute(SHAttribFormat::FLOAT_4D) });  // location = 0 (character position data)
-    vertexInputState.AddBinding(false, false, { SHVertexAttribute(SHAttribFormat::UINT32_1D) }); // location = 1 (glyph index to index matrices)
+    vertexInputState.AddBinding(true, false, { SHVertexAttribute(SHAttribFormat::FLOAT_4D) });  // location = 0 (character position data)
+    vertexInputState.AddBinding(true, false, { SHVertexAttribute(SHAttribFormat::UINT32_1D) }); // location = 1 (glyph index to index matrices)
 
     // Set vertex state for new pipeline
     pipeline->GetPipelineState().SetVertexInputState(vertexInputState);
@@ -146,6 +146,13 @@ namespace SHADE
 
     pipeline->GetPipelineState().SetColorBlenState(colorBlendState);
 
+    SHInputAssemblyState inputAssembly{};
+    inputAssembly.topology = vk::PrimitiveTopology::eTriangleFan;
+    pipeline->GetPipelineState().SetInputAssemblyState(inputAssembly);
+
+    SHRasterizationState rasterState{};
+    rasterState.frontFacingOrientation = vk::FrontFace::eClockwise;
+    pipeline->GetPipelineState().SetRasterizationState(rasterState);
 
     // Construct pipeline
     pipeline->ConstructPipeline();