Text Rendering WIP

Assets/Shaders/Text_FS.glsl

@@ -22,29 +22,43 @@ layout(location = 0) in struct
 // 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 
+// push constants
+layout(std140, push_constant) uniform TestPushConstant
 {
-  MatPropData data[];
-} MatProp;
+  vec3 textColor;
 
-layout(location = 0) out vec4 position;
+} testPushConstant;
+
+layout(set = 6, binding = 0) uniform sampler2D fontBitmap;
+
+layout(location = 0) out vec4 color;
 layout(location = 1) out uint outEntityID;
-layout(location = 2) out uint lightLayerIndices;
-layout(location = 3) out vec4 normals;
-layout(location = 4) out vec4 albedo;
+
+float median(float r, float g, float b) 
+{
+  return max(min(r, g), min(max(r, g), b));
+}
 
 void main()
 {
-  position = In.vertPos;
-  normals = In.normal;
-  albedo = texture(textures[nonuniformEXT(MatProp.data[In2.materialIndex].textureIndex)], In.uv) * MatProp.data[In2.materialIndex].color;
+  vec3 msd = texture (fontBitmap, In.uv).rgb;
+  float sd = median (msd.r, msd.g, msd.b);
+  float screenPxDistance = 2 * (sd - 0.5f);
+  float opacity = clamp (screenPxDistance + 0.5f, 0.0f, 2.0f);
 
+  vec4 fragColor = vec4 (1.0f);
+
+  if (opacity > 0.02f && opacity < 1.9f)
+  {
+    fragColor = vec4(0.0f, 1.0f, 1.0f, 1.0f);
+  }
+
+  fragColor = mix(vec4(0.0f), vec4(testPushConstant.textColor, 1.0f), min (opacity, 1.0f));
+
+
+  color = fragColor;
   outEntityID = In2.eid;
-  lightLayerIndices = In2.lightLayerIndex;
 }

Assets/Shaders/Text_FS.shshaderb.shmeta

@@ -0,0 +1,3 @@
+Name: Text_FS
+ID: 38024754
+Type: 2

Assets/Shaders/Text_VS.glsl

@@ -4,10 +4,12 @@
 //#include "ShaderDescriptorDefinitions.glsl"
 
 
+// vertex inputs
 layout(location = 0) in vec4 positionalOffset;
-layout(location = 1) in unsigned int glyphIndex;
-
+layout(location = 1) in uint glyphIndex;
+layout(location = 2) in uvec2 integerData;
 
+// between shader stages
 layout(location = 0) out struct
 {
   vec4 vertPos; // location 0
@@ -22,6 +24,7 @@ layout(location = 3) out struct
   uint eid;
 } Out2;
 
+// Camera data
 layout(set = 2, binding = 0) uniform CameraData
 {
   vec4 position; 
@@ -30,10 +33,65 @@ layout(set = 2, binding = 0) uniform CameraData
   mat4 projMat;
 } cameraData;
 
+// push constants
+layout(std140, push_constant) uniform TestPushConstant
+{
+  mat4 worldTransform;
+
+} testPushConstant;
+
+// Descriptor sets
+layout(std430, set = 6, binding = 1) buffer GlyphTransforms
+{
+  mat4 matrices[];
+} glyphTransforms;
+
+vec2 CreateQuad(in uint vertexID)
+{
+  uint b = 1 << vertexID;
+  return vec2 ((0x3 & b) != 0, (0x9 & b) != 0);
+}
+
 void main()
 {
+  // write EID data to FS
   Out2.eid = integerData[0];
 
-  // clip space for rendering
-  gl_Position = cameraData.vpMat * worldTransform * vec4 (aVertexPos, 1.0f);
+  // local variable for font index
+  uint fontIndex = glyphIndex;
+
+  // get font data
+  mat4 fontData = glyphTransforms.matrices[fontIndex];
+
+  // Generate UV coords and vertex positions
+  Out.uv = CreateQuad(gl_VertexIndex);
+  vec3 vertexPos = vec3(Out.uv, 1.0f);
+
+  // Get the local matrices
+  mat4 localModel = testPushConstant.worldTransform;
+
+  //mat4 uiScale = mat4(1.0f);
+  //uiScale[0][0] = cameraData.cameraRight / 20.49f;
+  //uiScale[1][1] = cameraData.cameraTop / 11.323f;
+
+  // transform the UV to atlas space to sample the font bitmap correctly
+  Out.uv = vec2(mat3(fontData) * vec3(Out.uv, 1.0f));
+
+  // Matrix to transform the quad from local to font space (for a font to be of correct size)
+  mat3 toFontSpace = mat3(1.0f);
+  toFontSpace[0][0] = fontData[3][0];
+  toFontSpace[1][1] = fontData[3][1];
+  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; 
+
+  // transform the vertex position to font space
+  gl_Position = PVMatrix * localModel * vec4(vertexPos, 1.0f);
 }

Assets/Shaders/Text_VS.shshaderb.shmeta

@@ -0,0 +1,3 @@
+Name: Text_VS
+ID: 39816727
+Type: 2

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

@@ -116,6 +116,9 @@ namespace SHADE
     // Create generic command buffer
     graphicsCmdPool = device->CreateCommandPool(SH_QUEUE_FAMILY_ARRAY_INDEX::GRAPHICS, SH_CMD_POOL_RESET::POOL_BASED, true);
 
+    SHAssetManager::CompileAsset("../../Assets/Shaders/Text_VS.glsl");
+    SHAssetManager::CompileAsset("../../Assets/Shaders/Text_FS.glsl");
+
     // Load Built In Shaders
     static constexpr AssetID VS_DEFAULT   = 39210065; defaultVertShader       = SHResourceManager::LoadOrGet<SHVkShaderModule>(VS_DEFAULT);
     static constexpr AssetID FS_DEFAULT   = 46377769; defaultFragShader       = SHResourceManager::LoadOrGet<SHVkShaderModule>(FS_DEFAULT);
@@ -123,7 +126,8 @@ namespace SHADE
     static constexpr AssetID FS_DEBUG     = 36671027; debugFragShader         = SHResourceManager::LoadOrGet<SHVkShaderModule>(FS_DEBUG);
     static constexpr AssetID CS_COMPOSITE = 45072428; deferredCompositeShader = SHResourceManager::LoadOrGet<SHVkShaderModule>(CS_COMPOSITE);
     static constexpr AssetID SSAO         = 38430899; ssaoShader              = SHResourceManager::LoadOrGet<SHVkShaderModule>(SSAO);
-    static constexpr AssetID SSAO_BLUR    = 39760835; ssaoBlurShader          = SHResourceManager::LoadOrGet<SHVkShaderModule>(SSAO_BLUR);
+    static constexpr AssetID TEXT_VS      = 39816727; textVS                  = SHResourceManager::LoadOrGet<SHVkShaderModule>(TEXT_VS);
+    static constexpr AssetID TEXT_FS      = 38024754; textFS                  = SHResourceManager::LoadOrGet<SHVkShaderModule>(TEXT_FS);
   }
 
   void SHGraphicsSystem::InitSceneRenderGraph(void) noexcept

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

@@ -412,6 +412,8 @@ namespace SHADE
     Handle<SHVkShaderModule>                                  deferredCompositeShader;
     Handle<SHVkShaderModule>                                  ssaoShader;
     Handle<SHVkShaderModule>                                  ssaoBlurShader;
+    Handle<SHVkShaderModule>                                  textVS;
+    Handle<SHVkShaderModule>                                  textFS;
 
 
     // Built-In Materials

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

@@ -6,6 +6,7 @@
 #include "Graphics/Devices/SHVkLogicalDevice.h"
 #include "Graphics/MiddleEnd/TextRendering/SHFont.h"
 #include "Graphics/Buffers/SHVkBuffer.h"
+#include "Graphics/MiddleEnd/GlobalData/SHGraphicsGlobalData.h"
 
 namespace SHADE
 {
@@ -86,11 +87,21 @@ namespace SHADE
 
   }
 
-  void SHTextRenderingSubSystem::Init(Handle<SHVkLogicalDevice> device, Handle<SHVkDescriptorPool> descPool) noexcept
+  void SHTextRenderingSubSystem::Init(Handle<SHVkLogicalDevice> device, Handle<SHVkRenderpass> compatibleRenderpass, Handle<SHSubpass> subpass, Handle<SHVkDescriptorPool> descPool, Handle<SHVkShaderModule> textVS, Handle<SHVkShaderModule> textFS) noexcept
   {
     logicalDevice = device;
 
+    // prepare pipeline layout params
+    SHPipelineLayoutParams plParams
+    {
+      .shaderModules = {textVS, textFS},
+      .globalDescSetLayouts = SHGraphicsGlobalData::GetDescSetLayouts()
+    };
 
+    pipelineLayout = logicalDevice->CreatePipelineLayout(plParams);
+
+    // Create pipeline
+    pipeline = logicalDevice->CreateGraphicsPipeline(pipelineLayout, nullptr, compatibleRenderpass, subpass);
   }
 
   void SHTextRenderingSubSystem::Run(uint32_t frameIndex) noexcept

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

@@ -14,6 +14,9 @@ namespace SHADE
   class SHTextRendererComponent;
   class SHVkPipeline;
   class SHVkPipelineLayout;
+  class SHVkRenderpass;
+  class SHSubpass;
+  class SHVkShaderModule;
 
   class SHTextRenderingSubSystem
   {
@@ -32,7 +35,7 @@ namespace SHADE
     void RecomputePositions(SHTextRendererComponent& textComp) noexcept;
 
   public:
-    void Init(Handle<SHVkLogicalDevice> device, Handle<SHVkDescriptorPool> descPool) noexcept;
+    void Init(Handle<SHVkLogicalDevice> device, Handle<SHVkRenderpass> compatibleRenderpass, Handle<SHSubpass> subpass, Handle<SHVkDescriptorPool> descPool, Handle<SHVkShaderModule> textVS, Handle<SHVkShaderModule> textFS) noexcept;
     void Run(uint32_t frameIndex) noexcept;
     void Render (void) noexcept;
     void Exit(void) noexcept;