Add ShaderReflector

- Used to look at the shader files and find set/binding automatically

CopiumEngine/CopiumEngine.vcxproj

@@ -194,6 +194,7 @@
     <ClCompile Include="src\copium\pipeline\Shader.cpp" />
     <ClCompile Include="src\copium\core\SwapChain.cpp" />
     <ClCompile Include="src\copium\sampler\Texture2D.cpp" />
+    <ClCompile Include="src\copium\util\ShaderReflector.cpp" />
     <ClCompile Include="src\copium\util\Timer.cpp" />
     <ClCompile Include="src\copium\buffer\UniformBuffer.cpp" />
     <ClCompile Include="src\copium\mesh\Vertex.cpp" />
@@ -233,6 +234,7 @@
     <ClInclude Include="src\copium\core\Instance.h" />
     <ClInclude Include="src\copium\core\QueueFamilies.h" />
     <ClInclude Include="src\copium\core\SwapChain.h" />
+    <ClInclude Include="src\copium\util\ShaderReflector.h" />
     <ClInclude Include="src\copium\util\Timer.h" />
     <ClInclude Include="src\copium\mesh\Vertex.h" />
     <ClInclude Include="src\copium\buffer\VertexBuffer.h" />

CopiumEngine/CopiumEngine.vcxproj.filters

@@ -123,6 +123,9 @@
     <ClCompile Include="src\copium\renderer\DrawCall.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="src\copium\util\ShaderReflector.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="src\copium\sampler\DepthAttachment.h">
@@ -236,6 +239,9 @@
     <ClInclude Include="src\copium\renderer\DrawCall.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="src\copium\util\ShaderReflector.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <None Include="res\shaders\shader.frag" />

CopiumEngine/res/shaders/passthrough.frag

@@ -1,11 +1,12 @@
 #version 450
 
 layout(set = 0, binding = 0) uniform sampler2D texSampler;
-layout(location = 0) in vec2 fragTexCoord;
+
+layout(location = 0) in vec2 inTexCoord;
 
 layout(location = 0) out vec4 outColor;
 
 void main()
 {
-  outColor = texture(texSampler, fragTexCoord);
+  outColor = texture(texSampler, inTexCoord);
 }

CopiumEngine/res/shaders/passthrough.vert

@@ -2,10 +2,10 @@
 
 layout(location = 0) in vec2 inPosition;
 
-layout(location = 0) out vec2 fragTexCoord;
+layout(location = 0) out vec2 outTexCoord;
 
 void main()
 {
   gl_Position = vec4(inPosition * 0.5, 0.999, 1.0);
-  fragTexCoord = inPosition * 0.5 + 0.5;
+  outTexCoord = inPosition * 0.5 + 0.5;
 }

CopiumEngine/res/shaders/renderer.frag

@@ -2,51 +2,51 @@
 
 layout(set = 0, binding = 0) uniform sampler2D texSamplers[32];
 
-layout(location = 0) in vec3 fragColor;
+layout(location = 0) in vec3 inColor;
-layout(location = 1) in vec2 fragTexCoord;
+layout(location = 1) in vec2 inTexCoord;
-layout(location = 2) in flat int fragTexIndex;
+layout(location = 2) in flat int inTexIndex;
 
 layout(location = 0) out vec4 outColor;
 
 vec4 TextureColor()
 {
-  if(fragTexIndex == 0) return texture(texSamplers[0], fragTexCoord);
+  if(inTexIndex == 0) return texture(texSamplers[0], inTexCoord);
-  if(fragTexIndex == 1) return texture(texSamplers[1], fragTexCoord);
+  if(inTexIndex == 1) return texture(texSamplers[1], inTexCoord);
-  if(fragTexIndex == 2) return texture(texSamplers[2], fragTexCoord);
+  if(inTexIndex == 2) return texture(texSamplers[2], inTexCoord);
-  if(fragTexIndex == 3) return texture(texSamplers[3], fragTexCoord);
+  if(inTexIndex == 3) return texture(texSamplers[3], inTexCoord);
-  if(fragTexIndex == 4) return texture(texSamplers[4], fragTexCoord);
+  if(inTexIndex == 4) return texture(texSamplers[4], inTexCoord);
-  if(fragTexIndex == 5) return texture(texSamplers[5], fragTexCoord);
+  if(inTexIndex == 5) return texture(texSamplers[5], inTexCoord);
-  if(fragTexIndex == 6) return texture(texSamplers[6], fragTexCoord);
+  if(inTexIndex == 6) return texture(texSamplers[6], inTexCoord);
-  if(fragTexIndex == 7) return texture(texSamplers[7], fragTexCoord);
+  if(inTexIndex == 7) return texture(texSamplers[7], inTexCoord);
-  if(fragTexIndex == 8) return texture(texSamplers[8], fragTexCoord);
+  if(inTexIndex == 8) return texture(texSamplers[8], inTexCoord);
-  if(fragTexIndex == 9) return texture(texSamplers[9], fragTexCoord);
+  if(inTexIndex == 9) return texture(texSamplers[9], inTexCoord);
-  if(fragTexIndex == 10) return texture(texSamplers[10], fragTexCoord);
+  if(inTexIndex == 10) return texture(texSamplers[10], inTexCoord);
-  if(fragTexIndex == 11) return texture(texSamplers[11], fragTexCoord);
+  if(inTexIndex == 11) return texture(texSamplers[11], inTexCoord);
-  if(fragTexIndex == 12) return texture(texSamplers[12], fragTexCoord);
+  if(inTexIndex == 12) return texture(texSamplers[12], inTexCoord);
-  if(fragTexIndex == 13) return texture(texSamplers[13], fragTexCoord);
+  if(inTexIndex == 13) return texture(texSamplers[13], inTexCoord);
-  if(fragTexIndex == 14) return texture(texSamplers[14], fragTexCoord);
+  if(inTexIndex == 14) return texture(texSamplers[14], inTexCoord);
-  if(fragTexIndex == 15) return texture(texSamplers[15], fragTexCoord);
+  if(inTexIndex == 15) return texture(texSamplers[15], inTexCoord);
-  if(fragTexIndex == 16) return texture(texSamplers[16], fragTexCoord);
+  if(inTexIndex == 16) return texture(texSamplers[16], inTexCoord);
-  if(fragTexIndex == 17) return texture(texSamplers[17], fragTexCoord);
+  if(inTexIndex == 17) return texture(texSamplers[17], inTexCoord);
-  if(fragTexIndex == 18) return texture(texSamplers[18], fragTexCoord);
+  if(inTexIndex == 18) return texture(texSamplers[18], inTexCoord);
-  if(fragTexIndex == 19) return texture(texSamplers[19], fragTexCoord);
+  if(inTexIndex == 19) return texture(texSamplers[19], inTexCoord);
-  if(fragTexIndex == 20) return texture(texSamplers[20], fragTexCoord);
+  if(inTexIndex == 20) return texture(texSamplers[20], inTexCoord);
-  if(fragTexIndex == 21) return texture(texSamplers[21], fragTexCoord);
+  if(inTexIndex == 21) return texture(texSamplers[21], inTexCoord);
-  if(fragTexIndex == 22) return texture(texSamplers[22], fragTexCoord);
+  if(inTexIndex == 22) return texture(texSamplers[22], inTexCoord);
-  if(fragTexIndex == 23) return texture(texSamplers[23], fragTexCoord);
+  if(inTexIndex == 23) return texture(texSamplers[23], inTexCoord);
-  if(fragTexIndex == 24) return texture(texSamplers[24], fragTexCoord);
+  if(inTexIndex == 24) return texture(texSamplers[24], inTexCoord);
-  if(fragTexIndex == 25) return texture(texSamplers[25], fragTexCoord);
+  if(inTexIndex == 25) return texture(texSamplers[25], inTexCoord);
-  if(fragTexIndex == 26) return texture(texSamplers[26], fragTexCoord);
+  if(inTexIndex == 26) return texture(texSamplers[26], inTexCoord);
-  if(fragTexIndex == 27) return texture(texSamplers[27], fragTexCoord);
+  if(inTexIndex == 27) return texture(texSamplers[27], inTexCoord);
-  if(fragTexIndex == 28) return texture(texSamplers[28], fragTexCoord);
+  if(inTexIndex == 28) return texture(texSamplers[28], inTexCoord);
-  if(fragTexIndex == 29) return texture(texSamplers[29], fragTexCoord);
+  if(inTexIndex == 29) return texture(texSamplers[29], inTexCoord);
-  if(fragTexIndex == 30) return texture(texSamplers[30], fragTexCoord);
+  if(inTexIndex == 30) return texture(texSamplers[30], inTexCoord);
-  if(fragTexIndex == 31) return texture(texSamplers[31], fragTexCoord);
+  if(inTexIndex == 31) return texture(texSamplers[31], inTexCoord);
   return vec4(1, 1, 1, 1);
 }
 
 
-void main() {
+void main()
-  outColor = vec4(fragColor, 1.0) * TextureColor();
+{
-  // outColor = vec4(fragTexCoord, 0.0, 1.0);
+  outColor = vec4(inColor, 1.0) * TextureColor();
 }

CopiumEngine/res/shaders/renderer.vert

@@ -9,7 +9,8 @@ layout(location = 0) out vec3 fragColor;
 layout(location = 1) out vec2 fragTexCoord;
 layout(location = 2) out int fragTexIndex;
 
-void main() {
+void main()
+{
   gl_Position = vec4(inPosition, 1.0);
   fragColor = inColor;
   fragTexCoord = inTexCoord;

CopiumEngine/res/shaders/shader.frag

@@ -2,14 +2,15 @@
 
 layout(set = 0, binding = 1) uniform sampler2D texSampler;
 
-layout(location = 0) in vec3 fragColor;
+layout(location = 0) in vec3 inColor;
-layout(location = 1) in vec2 fragTexCoord;
+layout(location = 1) in vec2 inTexCoord;
-layout(location = 2) in vec3 fragPosition;
+layout(location = 2) in vec3 inPosition;
-layout(location = 3) in vec3 fragLightPos;
+layout(location = 3) in vec3 inLightPos;
 
 layout(location = 0) out vec4 outColor;
 
-void main() {
+void main()
-  float scale = 0.45 +  max(dot(vec3(0, 1, 0), normalize(fragLightPos - fragPosition)), 0.0);
+{
-  outColor = vec4(fragColor, 1.0) * texture(texSampler, fragTexCoord) * scale;
+  float scale = 0.45 +  max(dot(vec3(0, 1, 0), normalize(inLightPos - inPosition)), 0.0);
+  outColor = vec4(inColor, 1.0) * texture(texSampler, inTexCoord) * scale;
 }

CopiumEngine/res/shaders/shader.vert

@@ -12,15 +12,16 @@ layout(location = 0) in vec3 inPosition;
 layout(location = 1) in vec3 inColor;
 layout(location = 2) in vec2 inTexCoord;
 
-layout(location = 0) out vec3 fragColor;
+layout(location = 0) out vec3 outColor;
-layout(location = 1) out vec2 fragTexCoord;
+layout(location = 1) out vec2 outTexCoord;
-layout(location = 2) out vec3 fragPosition;
+layout(location = 2) out vec3 outPosition;
-layout(location = 3) out vec3 fragLightPos;
+layout(location = 3) out vec3 outLightPos;
 
-void main() {
+void main()
+{
   gl_Position = ubo.projection * ubo.view * ubo.model * vec4(inPosition, 1.0);
-  fragColor = inColor;
+  outColor = inColor;
-  fragTexCoord = inTexCoord;
+  outTexCoord = inTexCoord;
-  fragPosition =  vec3(ubo.model * vec4(inPosition, 1.0));
+  outPosition =  vec3(ubo.model * vec4(inPosition, 1.0));
-  fragLightPos = ubo.lightPos;
+  outLightPos = ubo.lightPos;
 }

CopiumEngine/src/copium/core/Application.cpp

@@ -29,9 +29,9 @@ namespace Copium
 
   const std::vector<VertexPassthrough> verticesPassthrough = {
     VertexPassthrough{{-1.0f, -1.0f}},
-    VertexPassthrough{{ 1.0f, -1.0f}},
-    VertexPassthrough{{ 1.0f,  1.0f}},
     VertexPassthrough{{-1.0f,  1.0f}},
+    VertexPassthrough{{ 1.0f,  1.0f}},
+    VertexPassthrough{{ 1.0f, -1.0f}},
   };
 
   const std::vector<uint16_t> indicesPassthrough = {
@@ -69,7 +69,7 @@ namespace Copium
     if (framebuffer->GetWidth() != vulkan->GetSwapChain().GetExtent().width || framebuffer->GetHeight() != vulkan->GetSwapChain().GetExtent().height)
     {
       framebuffer->Resize(vulkan->GetSwapChain().GetExtent().width / 8, vulkan->GetSwapChain().GetExtent().height / 8);
-      descriptorSetPassthrough->AddSampler(framebuffer->GetColorAttachment(), 0);
+      descriptorSetPassthrough->SetSampler(framebuffer->GetColorAttachment(), 0);
     }
 
     if (!vulkan->GetSwapChain().BeginPresent())
@@ -113,26 +113,21 @@ namespace Copium
     descriptorPool = std::make_unique<DescriptorPool>(*vulkan);
 
     descriptorSet = std::make_unique<DescriptorSet>(*vulkan, *descriptorPool, graphicsPipeline->GetDescriptorSetLayout(0));
-    descriptorSet->AddUniform(*shaderUniformBuffer, 0);
+    descriptorSet->SetUniformBuffer(*shaderUniformBuffer, 0);
-    descriptorSet->AddSampler(*texture2D, 1);
+    descriptorSet->SetSampler(*texture2D, 1);
 
     descriptorSetPassthrough = std::make_unique<DescriptorSet>(*vulkan, *descriptorPool, graphicsPipelinePassthrough->GetDescriptorSetLayout(0));
-    descriptorSetPassthrough->AddSampler(framebuffer->GetColorAttachment(), 0);
+    descriptorSetPassthrough->SetSampler(framebuffer->GetColorAttachment(), 0);
   }
 
   void Application::InitializeGraphicsPipeline()
   {
     PipelineCreator creator{framebuffer->GetRenderPass(), "res/shaders/shader.vert", "res/shaders/shader.frag"};
-    creator.AddDescriptorSetLayoutBinding(0, 0, VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 1, VK_SHADER_STAGE_VERTEX_BIT);
-    creator.AddDescriptorSetLayoutBinding(0, 1, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 1, VK_SHADER_STAGE_FRAGMENT_BIT);
     creator.SetVertexDescriptor(Vertex::GetDescriptor());
-    creator.SetCullMode(VK_CULL_MODE_NONE);
     graphicsPipeline = std::make_unique<Pipeline>(*vulkan, creator);
 
     PipelineCreator creatorPassthrough{vulkan->GetSwapChain().GetRenderPass(), "res/shaders/passthrough.vert", "res/shaders/passthrough.frag"};
-    creatorPassthrough.AddDescriptorSetLayoutBinding(0, 0, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 1, VK_SHADER_STAGE_FRAGMENT_BIT);
     creatorPassthrough.SetVertexDescriptor(VertexPassthrough::GetDescriptor());
-    creatorPassthrough.SetCullMode(VK_CULL_MODE_NONE);
     graphicsPipelinePassthrough = std::make_unique<Pipeline>(*vulkan, creatorPassthrough);
   }
 

CopiumEngine/src/copium/pipeline/DescriptorSet.cpp

@@ -16,7 +16,7 @@ namespace Copium
     descriptorPool.FreeDescriptorSets(descriptorSets);
   }
 
-  void DescriptorSet::AddUniform(const UniformBuffer& uniformBuffer, uint32_t binding)
+  void DescriptorSet::SetUniformBuffer(const UniformBuffer& uniformBuffer, uint32_t binding)
   {
     for (size_t i = 0; i < descriptorSets.size(); ++i) {
       VkDescriptorBufferInfo bufferInfo = uniformBuffer.GetDescriptorBufferInfo(i);
@@ -35,15 +35,15 @@ namespace Copium
     }
   }
 
-  void DescriptorSet::AddSampler(const Sampler& sampler, uint32_t binding, int arrayIndex)
+  void DescriptorSet::SetSampler(const Sampler& sampler, uint32_t binding, int arrayIndex)
   {
     for (size_t i = 0; i < descriptorSets.size(); ++i)
     {
-      AddSampler(sampler, binding, i, arrayIndex);
+      SetSampler(sampler, binding, i, arrayIndex);
     }
   }
 
-  void DescriptorSet::AddSampler(const Sampler& sampler, uint32_t binding, int index, int arrayIndex)
+  void DescriptorSet::SetSampler(const Sampler& sampler, uint32_t binding, int index, int arrayIndex)
   {
     CP_ASSERT(index >= 0 && index < descriptorSets.size(), "AddSampler : index is out of range");
     VkDescriptorImageInfo imageInfo = sampler.GetDescriptorImageInfo(index);
@@ -60,7 +60,7 @@ namespace Copium
     vkUpdateDescriptorSets(vulkan.GetDevice(), 1, &descriptorWrite, 0, nullptr);
   }
 
-  void DescriptorSet::AddSamplers(const std::vector<const Sampler*>& samplers, uint32_t binding)
+  void DescriptorSet::SetSamplers(const std::vector<const Sampler*>& samplers, uint32_t binding)
   {
     for (size_t i = 0; i < descriptorSets.size(); ++i) {
       std::vector<VkWriteDescriptorSet> descriptorWrites{samplers.size()};

CopiumEngine/src/copium/pipeline/DescriptorSet.h

@@ -23,10 +23,10 @@ namespace Copium
     DescriptorSet(Vulkan& vulkan, DescriptorPool& descriptorPool, VkDescriptorSetLayout descriptorSetLayout);
     ~DescriptorSet();
 
-    void AddUniform(const UniformBuffer& uniformBuffer, uint32_t binding);
+    void SetUniformBuffer(const UniformBuffer& uniformBuffer, uint32_t binding);
-    void AddSampler(const Sampler& sampler, uint32_t binding, int arrayIndex = 0);
+    void SetSampler(const Sampler& sampler, uint32_t binding, int arrayIndex = 0);
-    void AddSampler(const Sampler& sampler, uint32_t binding, int index, int arrayIndex = 0);
+    void SetSampler(const Sampler& sampler, uint32_t binding, int index, int arrayIndex = 0);
-    void AddSamplers(const std::vector<const Sampler*>& sampler, uint32_t binding);
+    void SetSamplers(const std::vector<const Sampler*>& sampler, uint32_t binding);
     operator VkDescriptorSet() const;
   };
 }

CopiumEngine/src/copium/pipeline/PipelineCreator.cpp

@@ -8,19 +8,15 @@ namespace Copium
     : vertexShader{vertexShader},
       fragmentShader{fragmentShader},
       renderPass{renderPass}
-	{}
+  {
+    AddShaderDescription();
+  }
 
   void PipelineCreator::SetVertexDescriptor(const VertexDescriptor& descriptor)
   {
     vertexDescriptor = descriptor;
   }
 
-	void PipelineCreator::AddDescriptorSetLayoutBinding(uint32_t set, uint32_t binding, VkDescriptorType type, uint32_t count, VkShaderStageFlags stageFlags)
-	{
-		CP_ASSERT(set <= descriptorSetLayouts.size(), "AddDescriptorSetLayoutBinding : Cannot add descriptor set with set number greater than the current set count");
-		descriptorSetLayouts[set].emplace_back(DescriptorSetBinding{binding, type, count, stageFlags});
-	}
-
   void PipelineCreator::SetPrimitiveTopology(VkPrimitiveTopology primitiveTopology)
   {
     topology = primitiveTopology;
@@ -40,4 +36,39 @@ namespace Copium
   {
     this->depthTest = depthTest;
   }
+
+  void PipelineCreator::AddShaderDescription()
+  {
+    ShaderReflector reflector{vertexShader, fragmentShader};
+    for (auto& binding : reflector.bindings)
+    {
+      descriptorSetLayouts[binding.set].emplace_back(DescriptorSetBinding{binding.binding, GetDescriptorType(binding.bindingType), binding.arraySize, GetShaderStageFlags(binding.shaderType)});
+    }
+  }
+
+  VkDescriptorType PipelineCreator::GetDescriptorType(BindingType type)
+  {
+    switch (type)
+    {
+    case BindingType::Sampler2D:
+      return VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER;
+    case BindingType::UniformBuffer:
+      return VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER;
+    default:
+      CP_ABORT("GetDescriptorType : Unhandled switch case");
+    }
+  }
+
+  VkShaderStageFlags PipelineCreator::GetShaderStageFlags(ShaderType type)
+  {
+    switch (type)
+    {
+    case ShaderType::Vertex:
+      return VK_SHADER_STAGE_VERTEX_BIT;
+    case ShaderType::Fragment:
+      return VK_SHADER_STAGE_FRAGMENT_BIT;
+    default:
+      CP_ABORT("GetShaderStageFlags : Unhandled switch case");
+    }
+  }
 }

CopiumEngine/src/copium/pipeline/PipelineCreator.h

@@ -1,6 +1,7 @@
 #pragma once
 
 #include "copium/pipeline/VertexDescriptor.h"
+#include "copium/util/ShaderReflector.h"
 
 #include <map>
 #include <string>
@@ -25,7 +26,7 @@ namespace Copium
     std::string fragmentShader;
     VertexDescriptor vertexDescriptor{};
     VkPrimitiveTopology topology = VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST;
-		VkCullModeFlags cullMode = VK_CULL_MODE_BACK_BIT;
+    VkCullModeFlags cullMode = VK_CULL_MODE_FRONT_BIT;
     VkFrontFace frontFace = VK_FRONT_FACE_CLOCKWISE;
     VkRenderPass renderPass = VK_NULL_HANDLE;
     bool depthTest = true;
@@ -34,10 +35,13 @@ namespace Copium
     PipelineCreator(VkRenderPass renderPass, const std::string& vertexShader, const std::string& fragmentShader);
 
     void SetVertexDescriptor(const VertexDescriptor& descriptor);
-		void AddDescriptorSetLayoutBinding(uint32_t set, uint32_t binding, VkDescriptorType type, uint32_t count, VkShaderStageFlags stageFlags);
     void SetPrimitiveTopology(VkPrimitiveTopology primitiveTopology);
     void SetCullMode(VkCullModeFlags flags);
     void SetCullFrontFace(VkFrontFace cullFrontFace);
     void SetDepthTest(bool depthTest);
+  private:
+    void AddShaderDescription();
+    static VkDescriptorType GetDescriptorType(BindingType type);
+    static VkShaderStageFlags GetShaderStageFlags(ShaderType type);
   };
 }

CopiumEngine/src/copium/pipeline/Shader.cpp

@@ -80,9 +80,8 @@ namespace Copium
         if (FileSystem::DateModified(filename) < FileSystem::DateModified(spvFilename))
         {
           CP_DEBUG("InitializeShaderModuleFromGlslFile : Loading cached shader file: %s", filename.c_str());
-          std::vector<char> data = FileSystem::ReadFile(spvFilename);
+          std::vector<uint32_t> data = FileSystem::ReadFile32(spvFilename);
-          CP_ASSERT(data.size() % 4 == 0, "Spv data size is not a factor of 4");
+          return InitializeShaderModule(data.data(), data.size() * sizeof(uint32_t));
-          return InitializeShaderModule((const uint32_t*)data.data(), data.size());
         }
       }
     }

CopiumEngine/src/copium/renderer/DrawCall.cpp

@@ -10,7 +10,7 @@ namespace Copium
       vertexBuffer{vulkan, RendererVertex::GetDescriptor(), vertexCount},
       descriptorSet{vulkan, descriptorPool, pipeline.GetDescriptorSetLayout(0)}
   {
-    descriptorSet.AddSamplers(samplers, 0);
+    descriptorSet.SetSamplers(samplers, 0);
   }
 
   RendererVertexBuffer& DrawCall::GetVertexBuffer()

CopiumEngine/src/copium/renderer/Renderer.cpp

@@ -25,10 +25,10 @@ namespace Copium
   void Renderer::Quad(const glm::vec2& from, const glm::vec2& to, const glm::vec3& color)
   {
     AllocateQuad();
-    AddVertex(from, color, -1, glm::vec2{0, 0});
-    AddVertex(glm::vec2{to.x, from.y}, color, -1, glm::vec2{0, 0});
-    AddVertex(to, color, -1, glm::vec2{0, 0});
     AddVertex(glm::vec2{from.x, to.y}, color, -1, glm::vec2{0, 0});
+    AddVertex(to, color, -1, glm::vec2{0, 0});
+    AddVertex(glm::vec2{to.x, from.y}, color, -1, glm::vec2{0, 0});
+    AddVertex(from, color, -1, glm::vec2{0, 0});
   }
 
 
@@ -36,10 +36,10 @@ namespace Copium
   {
     AllocateQuad();
     int texIndex = AllocateSampler(sampler);
-    AddVertex(from, glm::vec3{1,1,1}, texIndex, texCoord1);
-    AddVertex(glm::vec2{to.x, from.y}, glm::vec3{1, 1, 1}, texIndex, glm::vec2{texCoord2.x, texCoord1.y});
-    AddVertex(to, glm::vec3{1,1,1}, texIndex, texCoord2);
     AddVertex(glm::vec2{from.x, to.y}, glm::vec3{1, 1, 1}, texIndex, glm::vec2{texCoord1.x, texCoord2.y});
+    AddVertex(to, glm::vec3{1,1,1}, texIndex, texCoord2);
+    AddVertex(glm::vec2{to.x, from.y}, glm::vec3{1, 1, 1}, texIndex, glm::vec2{texCoord2.x, texCoord1.y});
+    AddVertex(from, glm::vec3{1,1,1}, texIndex, texCoord1);
   }
 
   void Renderer::AddVertex(const glm::vec2& position, const glm::vec3& color, int texindex, const glm::vec2& texCoord)
@@ -88,7 +88,6 @@ namespace Copium
   {
     PipelineCreator creator{renderPass, "res/shaders/renderer.vert", "res/shaders/renderer.frag"};
     creator.SetVertexDescriptor(RendererVertex::GetDescriptor());
-    creator.AddDescriptorSetLayoutBinding(0, 0, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, MAX_NUM_TEXTURES, VK_SHADER_STAGE_FRAGMENT_BIT);
     creator.SetDepthTest(false);
     graphicsPipeline = std::make_unique<Pipeline>(vulkan, creator);
   }
@@ -107,7 +106,7 @@ namespace Copium
       Flush();
       NextDrawCall();
     }
-    currentDrawCall->GetDescriptorSet().AddSampler(sampler, 0, vulkan.GetSwapChain().GetFlightIndex(), textureCount);
+    currentDrawCall->GetDescriptorSet().SetSampler(sampler, 0, vulkan.GetSwapChain().GetFlightIndex(), textureCount);
     samplers[textureCount] = &sampler;
     textureCount++;
     return textureCount - 1;
@@ -117,7 +116,6 @@ namespace Copium
   {
     if (quadCount + 1 > MAX_NUM_QUADS)
     {
-      CP_INFO("Flush");
       Flush();
       NextDrawCall();
     }

CopiumEngine/src/copium/util/FileSystem.cpp

@@ -16,6 +16,21 @@ namespace Copium
     return buffer;
   }
 
+  std::vector<uint32_t> FileSystem::ReadFile32(const std::string& filename)
+  {
+    std::ifstream file(filename, std::ios::ate | std::ios::binary);
+    CP_ASSERT(file.is_open(), "ReadFile32 : Failed to open file");
+
+    size_t fileSize = (size_t)file.tellg();
+    CP_ASSERT(fileSize % 4 == 0, "ReadFile32 : byte size is not divisible by 4");
+    std::vector<uint32_t> buffer(fileSize / 4);
+
+    file.seekg(0);
+    file.read((char*)buffer.data(), fileSize);
+
+    return buffer;
+  }
+
   std::string FileSystem::ReadFileStr(const std::string& filename)
   {
     std::ifstream file(filename, std::ios::ate | std::ios::binary);

CopiumEngine/src/copium/util/FileSystem.h

@@ -14,6 +14,7 @@ namespace Copium
 		CP_STATIC_CLASS(FileSystem);
 	public:
 		static std::vector<char> ReadFile(const std::string& filename);
+		static std::vector<uint32_t> ReadFile32(const std::string& filename);
 		static std::string ReadFileStr(const std::string& filename);
 		static void WriteFile(const std::string& filename, const std::string& data);
 		static void WriteFile(const std::string& filename, const char* data, size_t size);

CopiumEngine/src/copium/util/ShaderReflector.cpp

@@ -0,0 +1,125 @@
+#include "copium/util/ShaderReflector.h"
+
+#include "copium/util/FileSystem.h"
+
+#include <string_view>
+
+namespace Copium
+{
+
+  ShaderReflector::ShaderReflector(const std::string& vertexGlslFile, const std::string& fragmentGlslFile)
+  {
+    ParseGlslFile(vertexGlslFile, ShaderType::Vertex);
+    ParseGlslFile(fragmentGlslFile, ShaderType::Fragment);
+  }
+
+  void ShaderReflector::ParseGlslFile(const std::string& glslFile, ShaderType shaderType)
+  {
+    std::string str = FileSystem::ReadFileStr(glslFile);
+    int index = 0;
+    while (index < str.size())
+    {
+      ParseWhitespace(str, index);
+      if (str[index] == '#')
+      {
+        ParseLine(str, index);
+        continue;
+      }
+      if (std::string_view(&str[index], sizeof("layout") - 1) == "layout")
+      {
+        ParseLayout(str, index, shaderType);
+        continue;
+      }
+      ParseLine(str, index);
+    }
+  }
+
+  void ShaderReflector::ParseLine(const std::string& str, int& index)
+  {
+    while(str[index] != '\n' && index < str.size()) index++;
+  }
+
+  void ShaderReflector::ParseWhitespace(const std::string& str, int& index)
+  {
+    while ((str[index] == '\n' || str[index] == ' ' || str[index] == '\t' || str[index] == '\r') && index < str.size()) index++;
+  }
+
+  void ShaderReflector::ParseLayout(const std::string& str, int& index, ShaderType shaderType)
+  {
+    // TODO: Make more robust, currently we might get a crash on the string if the glsl file is invalid
+    index += sizeof("layout") - 1;
+    ParseWhitespace(str, index);
+    index++; // "("
+    ParseWhitespace(str, index);
+    if (std::string_view(&str[index], sizeof("set") - 1) != "set")
+    {
+      ParseLine(str, index);
+      return;
+    }
+    ShaderBinding shaderBinding;
+    shaderBinding.shaderType = shaderType;
+    index += sizeof("set") - 1;
+    ParseWhitespace(str, index);
+    index++; // "="
+    ParseWhitespace(str, index);
+    char* end;
+    shaderBinding.set = std::strtol(&str[index], &end, 10);
+    index = end - str.c_str();
+    ParseWhitespace(str, index);
+    index++; // ","
+    ParseWhitespace(str, index);
+    index += sizeof("binding") - 1;
+    ParseWhitespace(str, index);
+    index++; // "="
+    ParseWhitespace(str, index);
+    shaderBinding.binding = std::strtol(&str[index], &end, 10);
+    index = end - str.c_str();
+    ParseWhitespace(str, index);
+    index++; // ")
+    ParseWhitespace(str, index);
+    index += sizeof("uniform") - 1;
+    ParseWhitespace(str, index);
+
+    std::string_view type = ParseWord(str, index);
+    ParseWhitespace(str, index);
+    if (str[index] == '{') ParseUniformBuffer(str, index);
+    ParseWhitespace(str, index);
+    std::string_view name = ParseWord(str, index);
+    shaderBinding.name = name;
+    ParseWhitespace(str, index);
+
+    if (str[index] == '[')
+    {
+      index++;
+      shaderBinding.arraySize = std::strtol(&str[index], &end, 10);
+    }
+    else
+    {
+      shaderBinding.arraySize = 1;
+    }
+
+    ParseLine(str, index);
+    if (type == "sampler2D")
+      shaderBinding.bindingType = BindingType::Sampler2D;
+    else
+      shaderBinding.bindingType = BindingType::UniformBuffer;
+    CP_ASSERT(bindings.emplace(shaderBinding).second, "ParseLayout : multiple layouts with the same binding");
+  }
+
+  std::string_view ShaderReflector::ParseWord(const std::string& str, int& index)
+  {
+    int start = index;
+    while (((str[index] >= 'a' && str[index] < 'z') || 
+            (str[index] >= 'A' && str[index] < 'Z') || 
+            (str[index] >= '0' && str[index] <= '9')) ||
+             str[index] == '_' && 
+           index < str.size()) index++;
+    return std::string_view(&str[start], index - start);
+  }
+
+  void ShaderReflector::ParseUniformBuffer(const std::string& str, int& index) 
+  {
+    while (str[index] != '}' && index < str.size()) index++;
+    if (index < str.size()) index++; // go past "}"
+  }
+}

CopiumEngine/src/copium/util/ShaderReflector.h

@@ -0,0 +1,51 @@
+#pragma once
+
+#include <string>
+#include <set>
+
+namespace Copium
+{
+  enum class BindingType
+  {
+    Sampler2D, UniformBuffer
+  };
+
+  enum class ShaderType
+  {
+    Vertex, Fragment
+  };
+
+  struct ShaderBinding
+  {
+    std::string name;
+    uint32_t set;
+    uint32_t binding;
+    uint32_t arraySize;
+    BindingType bindingType;
+    ShaderType shaderType;
+
+    bool operator<(const ShaderBinding& rhs) const
+    {
+      if (set != rhs.set)
+        return set < rhs.set;
+      if (binding != rhs.binding)
+        return binding < rhs.binding;
+    }
+  };
+
+  class ShaderReflector
+  {
+  public:
+    std::set<ShaderBinding> bindings;
+  public:
+    ShaderReflector(const std::string& vertexGlslFile, const std::string& fragmentGlslFile);
+
+  private:
+    void ParseGlslFile(const std::string& glslFile, ShaderType type);
+    void ParseLine(const std::string& str, int& index);
+    void ParseWhitespace(const std::string& str, int& index);
+    void ParseLayout(const std::string& str, int& index, ShaderType type);
+    std::string_view ParseWord(const std::string& str, int& index);
+    void ParseUniformBuffer(const std::string& str, int& index);
+  };
+}