From be6a11c62971eb5690d63881843f604bbc8facf1 Mon Sep 17 00:00:00 2001
From: Brandon Mak <xenosas@hotmail.com>
Date: Thu, 10 Nov 2022 08:28:44 +0800
Subject: [PATCH] Text Rendering WIP

---
 Assets/Shaders/Text_FS.glsl                   | 50 +++++++++++++++++++
 Assets/Shaders/Text_VS.glsl                   | 39 +++++++++++++++
 .../SHTextRenderingSubSystem.cpp              |  9 ++++
 .../TextRendering/SHTextRenderingSubSystem.h  |  8 +++
 4 files changed, 106 insertions(+)
 create mode 100644 Assets/Shaders/Text_FS.glsl
 create mode 100644 Assets/Shaders/Text_VS.glsl

diff --git a/Assets/Shaders/Text_FS.glsl b/Assets/Shaders/Text_FS.glsl
new file mode 100644
index 00000000..d6f88687
--- /dev/null
+++ b/Assets/Shaders/Text_FS.glsl
@@ -0,0 +1,50 @@
+#version 450
+#extension GL_ARB_separate_shader_objects : enable
+#extension GL_ARB_shading_language_420pack : enable
+#extension GL_EXT_nonuniform_qualifier : require
+
+struct MatPropData
+{
+  vec4 color;
+  int textureIndex;
+  float alpha;
+  vec3 beta;
+};
+
+layout(location = 0) in struct
+{
+  vec4 vertPos; // location 0
+  vec2 uv; // location = 1
+  vec4 normal; // location = 2
+
+} In;
+
+// material stuff
+layout(location = 3) flat in struct
+{
+  int materialIndex;
+  uint eid;
+  uint lightLayerIndex;
+} In2;
+
+layout (set = 0, binding = 1) uniform sampler2D textures[]; // for textures (global)
+layout (std430, set = 3, binding = 0) buffer MaterialProperties     // For materials 
+{
+  MatPropData data[];
+} MatProp;
+
+layout(location = 0) out vec4 position;
+layout(location = 1) out uint outEntityID;
+layout(location = 2) out uint lightLayerIndices;
+layout(location = 3) out vec4 normals;
+layout(location = 4) out vec4 albedo;
+
+void main()
+{
+  position = In.vertPos;
+  normals = In.normal;
+  albedo = texture(textures[nonuniformEXT(MatProp.data[In2.materialIndex].textureIndex)], In.uv) * MatProp.data[In2.materialIndex].color;
+
+  outEntityID = In2.eid;
+  lightLayerIndices = In2.lightLayerIndex;
+}
\ No newline at end of file
diff --git a/Assets/Shaders/Text_VS.glsl b/Assets/Shaders/Text_VS.glsl
new file mode 100644
index 00000000..bfc220d4
--- /dev/null
+++ b/Assets/Shaders/Text_VS.glsl
@@ -0,0 +1,39 @@
+#version 450
+#extension GL_KHR_vulkan_glsl : enable
+
+//#include "ShaderDescriptorDefinitions.glsl"
+
+
+layout(location = 0) in vec4 positionalOffset;
+layout(location = 1) in unsigned int glyphIndex;
+
+
+layout(location = 0) out struct
+{
+  vec4 vertPos; // location 0
+  vec2 uv; // location = 1
+  vec4 normal; // location = 2
+
+} Out;
+
+// material stuff
+layout(location = 3) out struct
+{
+  uint eid;
+} Out2;
+
+layout(set = 2, binding = 0) uniform CameraData
+{
+  vec4 position; 
+  mat4 vpMat;
+  mat4 viewMat;
+  mat4 projMat;
+} cameraData;
+
+void main()
+{
+  Out2.eid = integerData[0];
+  
+  // clip space for rendering
+  gl_Position = cameraData.vpMat * worldTransform * vec4 (aVertexPos, 1.0f);
+}
\ No newline at end of file
diff --git a/SHADE_Engine/src/Graphics/MiddleEnd/TextRendering/SHTextRenderingSubSystem.cpp b/SHADE_Engine/src/Graphics/MiddleEnd/TextRendering/SHTextRenderingSubSystem.cpp
index f4705f32..0db0b785 100644
--- a/SHADE_Engine/src/Graphics/MiddleEnd/TextRendering/SHTextRenderingSubSystem.cpp
+++ b/SHADE_Engine/src/Graphics/MiddleEnd/TextRendering/SHTextRenderingSubSystem.cpp
@@ -89,6 +89,8 @@ namespace SHADE
   void SHTextRenderingSubSystem::Init(Handle<SHVkLogicalDevice> device, Handle<SHVkDescriptorPool> descPool) noexcept
   {
     logicalDevice = device;
+
+    
   }
 
   void SHTextRenderingSubSystem::Run(uint32_t frameIndex) noexcept
@@ -114,6 +116,13 @@ namespace SHADE
     {
       // draw the component
 
+      // bind the pipeline 
+      // bind the pipeline layout
+      // bind VBO (position and indices)
+      // bind descriptors for font (matrices)
+
+      // call draw call
+
     }
   }
 
diff --git a/SHADE_Engine/src/Graphics/MiddleEnd/TextRendering/SHTextRenderingSubSystem.h b/SHADE_Engine/src/Graphics/MiddleEnd/TextRendering/SHTextRenderingSubSystem.h
index ec43c85b..271d3b99 100644
--- a/SHADE_Engine/src/Graphics/MiddleEnd/TextRendering/SHTextRenderingSubSystem.h
+++ b/SHADE_Engine/src/Graphics/MiddleEnd/TextRendering/SHTextRenderingSubSystem.h
@@ -12,6 +12,8 @@ namespace SHADE
   class SHLightComponent;
   class SHVkCommandBuffer;
   class SHTextRendererComponent;
+  class SHVkPipeline;
+  class SHVkPipelineLayout;
 
   class SHTextRenderingSubSystem
   {
@@ -20,6 +22,12 @@ namespace SHADE
     //! Logical device for creation and destruction
     Handle<SHVkLogicalDevice> logicalDevice;
 
+    //! Pipeline for rendering the text
+    Handle<SHVkPipeline> pipeline;
+
+    //! Pipeline layout for the pipeline
+    Handle<SHVkPipelineLayout> pipelineLayout;
+
   private:
     void RecomputePositions(SHTextRendererComponent& textComp) noexcept;