Renderer

Engine/Src/Imp/CPP/Renderer/Renderer.cpp

@@ -38,10 +38,10 @@ namespace ia::iae
     Pipeline *Renderer::s_geometryPipeline{};
     Pipeline *Renderer::s_postprocessPipeline{};
 
+    Renderer::Geometry *Renderer::s_quadGeometry{};
+
     VOID Renderer::Initialize()
     {
-        SDL_GetWindowSizeInPixels(g_windowHandle, &s_screenWidth, &s_screenHeight);
-
         if (!(s_gpuDevice = SDL_CreateGPUDevice(SDL_GPU_SHADERFORMAT_SPIRV, Engine::IsDebugMode(), nullptr)))
             THROW_UNKNOWN("Failed to create the SDL GPU Device: ", SDL_GetError());
 
@@ -53,16 +53,8 @@ namespace ia::iae
 
         GPUResourceManager::Initialize();
 
-        // Initialize Render Targets
+        SDL_GetWindowSizeInPixels(g_windowHandle, &s_screenWidth, &s_screenHeight);
-        s_renderTargetSceneDepth =
+        OnScreenResize(s_screenWidth, s_screenHeight);
-            GPUResourceManager::CreateTexture(SDL_GPU_TEXTUREUSAGE_DEPTH_STENCIL_TARGET, s_screenWidth, s_screenHeight,
-                                              nullptr, SDL_GPU_TEXTUREFORMAT_D16_UNORM);
-        s_renderTargetSceneColor = GPUResourceManager::CreateTexture(
-            SDL_GPU_TEXTUREUSAGE_COLOR_TARGET | SDL_GPU_TEXTUREUSAGE_SAMPLER, s_screenWidth, s_screenHeight, nullptr,
-            SDL_GetGPUSwapchainTextureFormat(s_gpuDevice, g_windowHandle));
-        s_renderTargetDebugDrawColor = GPUResourceManager::CreateTexture(
-            SDL_GPU_TEXTUREUSAGE_COLOR_TARGET | SDL_GPU_TEXTUREUSAGE_SAMPLER, s_screenWidth, s_screenHeight, nullptr,
-            SDL_GetGPUSwapchainTextureFormat(s_gpuDevice, g_windowHandle));
 
         // Initialize Pipelines
         s_geometryPipeline = new Pipeline(
@@ -96,9 +88,6 @@ namespace ia::iae
 
         DebugDraw::Initialize();
 
-        s_state.ProjectionMatrix =
-            glm::orthoLH(0.0f, (FLOAT32) s_screenWidth, (FLOAT32) s_screenHeight, 0.0f, -2097152.0f, 2097152.0f);
-
         s_state.ColorTargetInfo.clear_color = SDL_FColor{0.33f, 0.33f, 0.33f, 1.0f};
         s_state.ColorTargetInfo.load_op = SDL_GPU_LOADOP_CLEAR;
         s_state.ColorTargetInfo.store_op = SDL_GPU_STOREOP_STORE;
@@ -110,12 +99,23 @@ namespace ia::iae
         s_state.DepthStencilTargetInfo.store_op = SDL_GPU_STOREOP_STORE;
         s_state.DepthStencilTargetInfo.stencil_load_op = SDL_GPU_LOADOP_CLEAR;
         s_state.DepthStencilTargetInfo.stencil_store_op = SDL_GPU_STOREOP_STORE;
+
+        s_quadGeometry = CreateGeometry(
+            {
+                {glm::vec3{0, 1, 0}, glm::vec2{0, 1}, glm::vec4{1.0f, 1.0f, 1.0f, 1.0f}},
+                {glm::vec3{1, 1, 0}, glm::vec2{1, 1}, glm::vec4{1.0f, 1.0f, 1.0f, 1.0f}},
+                {glm::vec3{1, 0, 0}, glm::vec2{1, 0}, glm::vec4{1.0f, 1.0f, 1.0f, 1.0f}},
+                {glm::vec3{0, 0, 0}, glm::vec2{0, 0}, glm::vec4{1.0f, 1.0f, 1.0f, 1.0f}},
+            },
+            {0, 1, 2, 2, 3, 0});
     }
 
     VOID Renderer::Terminate()
     {
         SDL_WaitForGPUIdle(s_gpuDevice);
 
+        DestroyGeometry(s_quadGeometry);
+
         DebugDraw::Terminate();
 
         delete s_geometryPipeline;
@@ -133,6 +133,8 @@ namespace ia::iae
 
     VOID Renderer::BeginFrame()
     {
+        STATIC Mat4 IdentityMatrix(1.0f);
+
         if (!(s_state.ActiveCommandBuffer = SDL_AcquireGPUCommandBuffer(s_gpuDevice)))
             THROW_UNKNOWN("Failed to acquire SDL GPU command buffer: ", SDL_GetError());
 
@@ -143,7 +145,10 @@ namespace ia::iae
 
         SDL_BindGPUGraphicsPipeline(s_state.ActiveRenderPass, s_geometryPipeline->GetHandle());
         SDL_PushGPUVertexUniformData(s_state.ActiveCommandBuffer, 0, &s_state.ProjectionMatrix, sizeof(Mat4));
-        //SDL_PushGPUVertexUniformData(s_state.ActiveCommandBuffer, 1, s_state.ActiveCamera->GetMatrix(), sizeof(Mat4));
+        SDL_PushGPUVertexUniformData(
+            s_state.ActiveCommandBuffer, 1,
+            (s_state.ActiveCamera && !s_state.CameraRelative) ? s_state.ActiveCamera->GetMatrix() : &IdentityMatrix,
+            sizeof(Mat4));
     }
 
     VOID Renderer::EndFrame()
@@ -185,13 +190,84 @@ namespace ia::iae
 
     VOID Renderer::OnScreenResize(IN INT32 newWidth, IN INT32 newHeight)
     {
+        s_screenWidth = newWidth;
+        s_screenHeight = newHeight;
 
+        if (s_renderTargetSceneDepth)
+            GPUResourceManager::DestroyTexture(s_renderTargetSceneDepth);
+        if (s_renderTargetSceneColor)
+            GPUResourceManager::DestroyTexture(s_renderTargetSceneColor);
+        if (s_renderTargetDebugDrawColor)
+            GPUResourceManager::DestroyTexture(s_renderTargetDebugDrawColor);
+
+        s_renderTargetSceneDepth =
+            GPUResourceManager::CreateTexture(SDL_GPU_TEXTUREUSAGE_DEPTH_STENCIL_TARGET, s_screenWidth, s_screenHeight,
+                                              nullptr, SDL_GPU_TEXTUREFORMAT_D16_UNORM);
+        s_renderTargetSceneColor = GPUResourceManager::CreateTexture(
+            SDL_GPU_TEXTUREUSAGE_COLOR_TARGET | SDL_GPU_TEXTUREUSAGE_SAMPLER, s_screenWidth, s_screenHeight, nullptr,
+            SDL_GetGPUSwapchainTextureFormat(s_gpuDevice, g_windowHandle));
+        s_renderTargetDebugDrawColor = GPUResourceManager::CreateTexture(
+            SDL_GPU_TEXTUREUSAGE_COLOR_TARGET | SDL_GPU_TEXTUREUSAGE_SAMPLER, s_screenWidth, s_screenHeight, nullptr,
+            SDL_GetGPUSwapchainTextureFormat(s_gpuDevice, g_windowHandle));
+
+        s_state.ProjectionMatrix =
+            glm::orthoLH(0.0f, (FLOAT32) s_screenWidth, (FLOAT32) s_screenHeight, 0.0f, -2097152.0f, 2097152.0f);
     }
 
     SDL_GPUTextureFormat Renderer::GetRenderTargetFormat()
     {
         return SDL_GetGPUSwapchainTextureFormat(s_gpuDevice, g_windowHandle);
     }
+
+    Renderer::Geometry *Renderer::CreateGeometry(IN CONST Vector<GeometryVertex> &vertices,
+                                                 IN CONST Vector<INT32> &indices)
+    {
+        const auto mesh = new Geometry();
+        mesh->VertexBuffer = GPUResourceManager::CreateDeviceLocalBuffer(
+            SDL_GPU_BUFFERUSAGE_VERTEX, vertices.data(), static_cast<UINT32>(vertices.size() * sizeof(vertices[0])));
+        mesh->IndexBuffer = GPUResourceManager::CreateDeviceLocalBuffer(
+            SDL_GPU_BUFFERUSAGE_INDEX, indices.data(), static_cast<UINT32>(indices.size() * sizeof(indices[0])));
+        mesh->IndexCount = static_cast<UINT32>(indices.size());
+        return mesh;
+    }
+
+    VOID Renderer::DestroyGeometry(IN Geometry *handle)
+    {
+        delete handle;
+    }
+
+    VOID Renderer::DrawGeometry(IN Geometry *handle)
+    {
+#pragma pack(push, 1)
+
+        STATIC struct
+        {
+            INT32 FlippedH{false};
+            INT32 FlippedV{false};
+            Vec2 TextureOffset{0.0f, 0.0f};
+            glm::vec4 ColorOverlay{1.0f, 1.0f, 1.0f, 1.0f};
+        } s_fragmentUniform{};
+
+#pragma pack(pop)
+
+        s_fragmentUniform.ColorOverlay = Vec4(s_state.ColorOverlay.R / 255.0f, s_state.ColorOverlay.G / 255.0f,
+                                              s_state.ColorOverlay.B / 255.0f, s_state.ColorOverlay.A / 255.0f);
+        s_fragmentUniform.FlippedH = s_state.FlippedH;
+        s_fragmentUniform.FlippedV = s_state.FlippedV;
+        s_fragmentUniform.TextureOffset = s_state.TextureOffset;
+        SDL_GPUTextureSamplerBinding textureBinding{.texture = s_state.ActiveTexture,
+                                                    .sampler = GPUResourceManager::GetSampler_LinearRepeat()};
+        SDL_BindGPUFragmentSamplers(s_state.ActiveRenderPass, 0, &textureBinding, 1);
+        SDL_PushGPUFragmentUniformData(s_state.ActiveCommandBuffer, 0, &s_fragmentUniform, sizeof(s_fragmentUniform));
+
+        SDL_SetGPUScissor(s_state.ActiveRenderPass, &s_state.Scissor);
+
+        SDL_GPUBufferBinding bufferBindings[] = {{.buffer = handle->VertexBuffer, .offset = 0},
+                                                 {.buffer = handle->IndexBuffer, .offset = 0}};
+        SDL_BindGPUVertexBuffers(s_state.ActiveRenderPass, 0, bufferBindings, 1);
+        SDL_BindGPUIndexBuffer(s_state.ActiveRenderPass, &bufferBindings[1], SDL_GPU_INDEXELEMENTSIZE_32BIT);
+        SDL_DrawGPUIndexedPrimitives(s_state.ActiveRenderPass, handle->IndexCount, 1, 0, 0, 0);
+    }
 } // namespace ia::iae
 
 namespace ia::iae
@@ -203,15 +279,17 @@ namespace ia::iae
 
     Handle Engine::CreateGeometry(IN CONST Vector<GeometryVertex> &vertices, IN CONST Vector<INT32> &indices)
     {
-        return INVALID_HANDLE;
+        return (Handle) Renderer::CreateGeometry(vertices, indices);
     }
 
     VOID Engine::DestroyGeometry(IN Handle geometry)
     {
+        Renderer::DestroyGeometry((Renderer::Geometry *) geometry);
     }
 
     VOID Engine::DrawGeometry(IN Handle handle)
     {
+        Renderer::DrawGeometry((Renderer::Geometry *) handle);
     }
 
     VOID Engine::SetRenderState_Scissor(IN IVec4 rect)
@@ -247,11 +325,35 @@ namespace ia::iae
 
     VOID Engine::SetRenderState_Texture(IN Handle image)
     {
-        Renderer::s_state.ActiveTexture = image;
+        Renderer::s_state.ActiveTexture = (SDL_GPUTexture *) image;
     }
 
     VOID Engine::SetRenderState_Transform(IN Vec2 position, IN Vec2 scale, IN FLOAT32 rotation, IN UINT8 layer,
                                           IN INT16 sortIndex)
     {
+        IA_ASSERT(sortIndex <= 0x1FFF);
+
+        if (Renderer::s_state.YSortingEnabled)
+            sortIndex += static_cast<INT16>(position.y);
+
+        Renderer::s_state.ModelMatrix =
+            glm::translate(glm::mat4(1.0f), glm::vec3{position.x, position.y,
+                                                      static_cast<FLOAT32>((layer << 13) | (sortIndex & 0x1FFF))});
+        Renderer::s_state.ModelMatrix =
+            glm::rotate(Renderer::s_state.ModelMatrix, rotation, glm::vec3(0.0f, 0.0f, 1.0f));
+        Renderer::s_state.ModelMatrix = glm::scale(Renderer::s_state.ModelMatrix, glm::vec3{scale.x, scale.y, 1.0f});
+
+        SDL_PushGPUVertexUniformData(Renderer::s_state.ActiveCommandBuffer, 2, &Renderer::s_state.ModelMatrix,
+                                     sizeof(Mat4));
+    }
+
+    VOID Engine::SetRenderState_YSortingEnabled(IN BOOL value)
+    {
+        Renderer::s_state.YSortingEnabled = value;
+    }
+
+    Handle Engine::GetGeometry_Quad()
+    {
+        return (Handle)Renderer::s_quadGeometry;
     }
 } // namespace ia::iae

Engine/Src/Imp/HPP/Renderer/Renderer.hpp

@@ -24,7 +24,7 @@ namespace ia::iae
     class Renderer
     {
       public:
-        struct Mesh
+        struct Geometry
         {
             INT32 IndexCount{};
             SDL_GPUBuffer *IndexBuffer;
@@ -36,11 +36,11 @@ namespace ia::iae
             BOOL FlippedH{false};
             BOOL FlippedV{false};
             BOOL CameraRelative{true};
-            BOOL ScissorEnabled{false};
+            BOOL YSortingEnabled{false};
             Color ColorOverlay{};
             Vec2 TextureOffset{0.0f, 0.0f};
             SDL_Rect Scissor{0, 0, 0, 0};
-            Handle ActiveTexture{INVALID_HANDLE};
+            SDL_GPUTexture* ActiveTexture{nullptr};
             
             Mat4 ModelMatrix{1.0f};
             Mat4 ProjectionMatrix{1.0f};
@@ -63,6 +63,11 @@ namespace ia::iae
         STATIC VOID OnScreenResize(IN INT32 newWidth, IN INT32 newHeight);
 
       public:
+        STATIC Geometry* CreateGeometry(IN CONST Vector<GeometryVertex> &vertices, IN CONST Vector<INT32> &indices);
+        STATIC VOID DestroyGeometry(IN Geometry* handle);
+
+        STATIC VOID DrawGeometry(IN Geometry* handle);
+
         STATIC SDL_GPUTextureFormat GetRenderTargetFormat();
 
         STATIC SDL_GPUDevice *GetDevice()
@@ -80,6 +85,7 @@ namespace ia::iae
         STATIC SDL_GPUTexture *s_renderTargetDebugDrawColor;
         STATIC Pipeline* s_geometryPipeline;
         STATIC Pipeline* s_postprocessPipeline;
+        STATIC Geometry* s_quadGeometry;
 
         friend class Engine;
     };

Engine/Src/Inc/IAEngine/Engine.hpp

@@ -38,6 +38,7 @@ namespace ia::iae
         STATIC VOID DestroyPhysicsBody(IN Handle body);
 
         // Renderer Functions
+        STATIC Handle GetGeometry_Quad();
         STATIC Handle CreateGeometry(IN CONST Vector<GeometryVertex>& vertices, IN CONST Vector<INT32>& indices);
         STATIC VOID DestroyGeometry(IN Handle geometry);
         STATIC VOID DrawGeometry(IN Handle handle); 
@@ -48,6 +49,7 @@ namespace ia::iae
         STATIC VOID SetRenderState_FlippedH(IN BOOL value);
         STATIC VOID SetRenderState_FlippedV(IN BOOL value);
         STATIC VOID SetRenderState_TextureOffset(IN Vec2 off);
+        STATIC VOID SetRenderState_YSortingEnabled(IN BOOL value);
         STATIC VOID SetRenderState_ColorOverlay(IN Color color);
         STATIC VOID SetRenderState_CameraRelative(IN BOOL value);
         STATIC VOID SetRenderState_Texture(IN Handle image);