feat: add forward+ rendering

destrum/include/destrum/Components/LightComponent.h

@@ -0,0 +1,51 @@
+#ifndef LIGHTCOMPONENT_H
+#define LIGHTCOMPONENT_H
+
+#include <destrum/ObjectModel/Component.h>
+#include <destrum/Graphics/Light.h>
+
+#include <glm/glm.hpp>
+
+class LightComponent final : public Component {
+public:
+    explicit LightComponent(GameObject& parent, LightType type = LightType::Point);
+
+    LightComponent(const LightComponent& other) = delete;
+    LightComponent(LightComponent&& other) noexcept = delete;
+    LightComponent& operator=(const LightComponent& other) = delete;
+    LightComponent& operator=(LightComponent&& other) noexcept = delete;
+
+    void Render(const RenderContext& ctx) override;
+
+    std::string GetTypeName() const override { return "LightComponent"; }
+
+    nlohmann::json Serialize() const override;
+    void Deserialize(const nlohmann::json& data) override;
+    void ImGuiInspector() override;
+
+    void SetType(LightType type) { m_Type = type; }
+    [[nodiscard]] LightType GetType() const { return m_Type; }
+
+    void SetColor(const glm::vec3& color) { m_Color = color; }
+    [[nodiscard]] const glm::vec3& GetColor() const { return m_Color; }
+
+    void SetIntensity(float intensity);
+    [[nodiscard]] float GetIntensity() const { return m_Intensity; }
+
+    void SetRange(float range);
+    [[nodiscard]] float GetRange() const { return m_Range; }
+
+    void SetConeAngles(float innerConeAngle, float outerConeAngle);
+    [[nodiscard]] float GetInnerConeAngle() const { return m_InnerConeAngle; }
+    [[nodiscard]] float GetOuterConeAngle() const { return m_OuterConeAngle; }
+
+private:
+    LightType m_Type{LightType::Point};
+    glm::vec3 m_Color{1.0f};
+    float m_Intensity{1.0f};
+    float m_Range{10.0f};
+    float m_InnerConeAngle{0.35f};
+    float m_OuterConeAngle{0.5f};
+};
+
+#endif // LIGHTCOMPONENT_H

destrum/include/destrum/Graphics/Light.h

@@ -0,0 +1,47 @@
+#ifndef LIGHT_H
+#define LIGHT_H
+
+#include <cstdint>
+
+#include <glm/vec2.hpp>
+#include <glm/vec3.hpp>
+
+enum class LightType : std::uint32_t {
+    Directional = 0,
+    Point = 1,
+    Spot = 2,
+};
+
+struct Light {
+    LightType type{LightType::Point};
+
+    glm::vec3 position{0.0f};
+    glm::vec3 direction{0.0f, -1.0f, 0.0f};
+
+    glm::vec3 color{1.0f};
+    float intensity{1.0f};
+
+    float range{10.0f};
+
+    float innerConeAngle{0.35f};
+    float outerConeAngle{0.5f};
+};
+
+struct GPULight {
+    glm::vec3 position;
+    float range;
+
+    glm::vec3 color;
+    float intensity;
+
+    glm::vec3 direction;
+    std::uint32_t type;
+
+    float spotInnerCos;
+    float spotOuterCos;
+    glm::vec2 padding;
+};
+
+static_assert(sizeof(GPULight) == 64, "GPULight must match the struct in lights.glsl");
+
+#endif //LIGHT_H

destrum/include/destrum/Graphics/Pipelines/LightCullingPipeline.h

@@ -0,0 +1,78 @@
+#ifndef LIGHTCULLINGPIPELINE_H
+#define LIGHTCULLINGPIPELINE_H
+
+#include <vulkan/vulkan.h>
+#include <array>
+#include <memory>
+#include <glm/glm.hpp>
+
+#include <destrum/Graphics/ComputePipeline.h>
+#include <destrum/Graphics/Light.h>
+#include <destrum/Graphics/ids.h>
+#include <destrum/Graphics/Resources/AppendableBuffer.h>
+#include <destrum/Graphics/Resources/Buffer.h>
+
+class GfxDevice;
+class RenderResources;
+
+class LightCullingPipeline final {
+public:
+
+    static constexpr std::uint32_t TILE_SIZE = 16;
+    static constexpr std::uint32_t MAX_LIGHTS_PER_TILE = 255;
+    static constexpr std::uint32_t TILE_STRIDE = MAX_LIGHTS_PER_TILE + 1;
+
+    static constexpr std::size_t MAX_LIGHTS = 1024;
+
+    void init(GfxDevice& gfxDevice, RenderResources& resources, glm::ivec2 drawImageSize);
+    void cleanup(GfxDevice& gfxDevice);
+
+    void resize(GfxDevice& gfxDevice, glm::ivec2 drawImageSize);
+
+    void beginDrawing(std::size_t frameIndex);
+    void appendLight(const Light& light);
+
+    void flushCurrentFrame(VkCommandBuffer cmd, GfxDevice& gfxDevice);
+
+    void cullLights(
+        VkCommandBuffer cmd,
+        const RenderResources& resources,
+        const GPUBuffer& sceneDataBuffer,
+        ImageID depthImageId,
+        VkExtent2D renderExtent);
+
+    [[nodiscard]] VkDeviceAddress getLightsBufferAddress() const;
+    [[nodiscard]] VkDeviceAddress getTileLightIndicesBufferAddress() const { return tileLightIndicesBuffer.address; }
+
+    [[nodiscard]] std::uint32_t getNumLights() const;
+    [[nodiscard]] glm::uvec2 getTileCount() const { return tileCount; }
+
+private:
+    void createTileBuffer(GfxDevice& gfxDevice, glm::ivec2 drawImageSize);
+
+    VkPipelineLayout m_pipelineLayout{VK_NULL_HANDLE};
+    std::unique_ptr<ComputePipeline> lightCullingPipeline;
+
+    struct PushConstants {
+        VkDeviceAddress sceneDataBuffer;
+        glm::uvec2 screenSize;
+        std::uint32_t depthTexId;
+        std::uint32_t padding;
+    };
+
+    struct PerFrameData {
+        AppendableBuffer<GPULight> lightsBuffer;
+    };
+
+    std::array<PerFrameData, FRAMES_IN_FLIGHT> framesData;
+    std::size_t currentFrameIndex{0};
+    bool warnedAboutLightLimit{false};
+
+    GPUBuffer tileLightIndicesBuffer;
+    glm::uvec2 tileCount{0u, 0u};
+
+    PerFrameData& getCurrentFrameData();
+    const PerFrameData& getCurrentFrameData() const;
+};
+
+#endif //LIGHTCULLINGPIPELINE_H

destrum/include/destrum/Graphics/Pipelines/MeshPipeline.h

@@ -27,6 +27,15 @@ public:
         VkFormat drawImageFormat,
         VkFormat depthImageFormat);
 
+    void drawDepthPrepass(
+        VkCommandBuffer cmd,
+        VkExtent2D renderExtent,
+        const RenderResources& resources,
+        const Camera& camera,
+        const GPUBuffer& sceneDataBuffer,
+        const std::vector<MeshDrawCommand>& drawCommands,
+        const std::vector<std::size_t>& sortedDrawCommands);
+
     void draw(
         VkCommandBuffer cmd,
         VkExtent2D renderExtent,
@@ -55,9 +64,20 @@ private:
         std::uint32_t padding;
     };
 
+    void drawMeshes(
+        VkCommandBuffer cmd,
+        const Pipeline& pipeline,
+        VkExtent2D renderExtent,
+        const RenderResources& resources,
+        const Camera& camera,
+        const GPUBuffer& sceneDataBuffer,
+        const std::vector<MeshDrawCommand>& drawCommands,
+        const std::vector<std::size_t>& sortedDrawCommands);
+
 private:
     VkPipelineLayout m_pipelineLayout{VK_NULL_HANDLE};
     std::unique_ptr<Pipeline> m_pipeline;
+    std::unique_ptr<Pipeline> m_depthPrepassPipeline;
 
     bool m_renderWireframe{false};
 };

destrum/include/destrum/Graphics/Pipelines/SkyboxPipeline.h

@@ -35,7 +35,6 @@ private:
     struct SkyboxPushConstants {
         glm::mat4  invViewProj;
         glm::vec4  skyboxRot[3];
-        glm::vec3  cameraPos;
         std::uint32_t skyboxTextureId;
     };
 

destrum/include/destrum/Graphics/RenderResources.h

@@ -57,7 +57,10 @@ public:
     BindlessSetManager& getBindlessSetManager();
     VkDescriptorSetLayout getBindlessDescSetLayout() const;
     const VkDescriptorSet& getBindlessDescSet() const;
-    void bindBindlessDescSet(VkCommandBuffer cmd, VkPipelineLayout layout) const;
+    void bindBindlessDescSet(
+        VkCommandBuffer cmd,
+        VkPipelineLayout layout,
+        VkPipelineBindPoint bindPoint = VK_PIPELINE_BIND_POINT_GRAPHICS) const;
 
     MeshCache& meshes() { return *meshCache; }
     const MeshCache& meshes() const { return *meshCache; }

destrum/include/destrum/Graphics/Renderer.h

@@ -5,6 +5,8 @@
 #include <glm/vec3.hpp>
 
 #include <destrum/Graphics/Camera.h>
+#include <destrum/Graphics/Light.h>
+#include <destrum/Graphics/Pipelines/LightCullingPipeline.h>
 #include <destrum/Graphics/Pipelines/LineRenderingPass.h>
 #include <destrum/Graphics/Pipelines/MeshPipeline.h>
 #include <destrum/Graphics/Pipelines/QuadRendererPass.h>
@@ -20,9 +22,11 @@
 
 #include "Pipelines/SkyboxPipeline.h"
 
-class GameRenderer {
+class GameRenderer
+{
 public:
-    struct SceneData {
+    struct SceneData
+    {
         const Camera& camera;
         glm::vec3 ambientColor;
         float ambientIntensity;
@@ -40,11 +44,15 @@ public:
     void cleanup(GfxDevice& gfxDevice);
 
     void drawMesh(MeshID id, const glm::mat4& transform, MaterialID materialId);
-    void drawSkinnedMesh(MeshID id, const glm::mat4& transform, MaterialID materialId, SkinnedMesh* skinnedMesh, std::size_t jointMatricesStartIndex);
+    void drawSkinnedMesh(MeshID id, const glm::mat4& transform, MaterialID materialId, SkinnedMesh* skinnedMesh,
+                         std::size_t jointMatricesStartIndex);
+    void submitLight(const Light& light);
     const GPUImage& getDrawImage() const;
 
-    void resize(GfxDevice& gfxDevice, const glm::ivec2& newSize) {
+    void resize(GfxDevice& gfxDevice, const glm::ivec2& newSize)
+    {
         createDrawImage(gfxDevice, newSize, false);
+        lightCullingPipeline->resize(gfxDevice, newSize);
     }
 
     Material& getMaterialMutable(MaterialID id);
@@ -54,18 +62,31 @@ public:
 
     void flushMaterialUpdates(GfxDevice& gfxDevice);
 
-    [[nodiscard]] SkinningPipeline& getSkinningPipeline() const {
+    [[nodiscard]] SkinningPipeline& getSkinningPipeline() const
+    {
         return *skinningPipeline;
     }
 
-    void setRenderWireframe(bool wireframe) {
+    void setRenderWireframe(bool wireframe)
+    {
         meshPipeline->setRenderWireframe(wireframe);
     }
 
-    bool getRenderWireframe() {
+    bool getRenderWireframe()
+    {
         return meshPipeline->getRenderWireframe();
     }
 
+    void setRenderLightHeatmap(bool heatmap)
+    {
+        renderLightHeatmap = heatmap;
+    }
+
+    bool getRenderLightHeatmap() const
+    {
+        return renderLightHeatmap;
+    }
+
     RenderResources* getResources()
     {
         return resources;
@@ -96,33 +117,41 @@ private:
     VkSampleCountFlagBits samples{VK_SAMPLE_COUNT_1_BIT};
 
 
-    struct GPUSceneData {
-        // camera
+    struct GPUSceneData
+    {
         glm::mat4 view;
         glm::mat4 proj;
+        glm::mat4 invProj;
         glm::mat4 viewProj;
         glm::vec4 cameraPos;
 
-        // ambient
         glm::vec3 ambientColor;
         float ambientIntensity;
 
-        // fog
         glm::vec3 fogColor;
         float fogDensity;
 
         VkDeviceAddress materialsBuffer;
+
+        VkDeviceAddress lightsBuffer;
+        VkDeviceAddress tileLightIndicesBuffer;
+        std::uint32_t numLights;
+        std::uint32_t tileCountX;
+        std::uint32_t debugLightHeatmap;
+        std::uint32_t padding;
     };
 
     NBuffer sceneDataBuffer;
 
-
     std::unique_ptr<MeshPipeline> meshPipeline;
     std::unique_ptr<SkyboxPipeline> skyboxPipeline;
     std::unique_ptr<LineRenderingPass> lineRenderingPass;
     std::unique_ptr<QuadRendererPass> quadRendererPass;
 
     std::unique_ptr<SkinningPipeline> skinningPipeline;
+    std::unique_ptr<LightCullingPipeline> lightCullingPipeline;
+
+    bool renderLightHeatmap{false};
     bool initialized{false};
 };
 

destrum/include/destrum/Serialization/EngineComponentList.h

@@ -1,9 +1,8 @@
 #ifndef DESTRUM_ENGINECOMPONENTLIST_H
 #define DESTRUM_ENGINECOMPONENTLIST_H
 
-// Keep the component manifest in one place. Consumers define X before
-// expanding one of these lists to generate registration or other metadata.
 #include <destrum/Components/Animator.h>
+#include <destrum/Components/LightComponent.h>
 #include <destrum/Components/MeshRendererComponent.h>
 #include <destrum/Components/OrbitAndSpin.h>
 #include <destrum/Components/Rotator.h>
@@ -15,6 +14,7 @@
 
 #define DESTRUM_ENGINE_COMPONENTS(X) \
     X(MeshRendererComponent) \
+    X(LightComponent) \
     X(Rotator) \
     X(Spinner) \
     X(OrbitAndSpin) \

destrum/include/destrum/Serialization/SceneSerializer.h

@@ -22,11 +22,8 @@ public:
     static bool Load(Scene& scene, const std::filesystem::path& path,
                      std::function<void(float)> progressCallback = nullptr);
 
-    // Thread-safe: parse and validate a scene file on any thread.
-    // No engine state is touched during parsing.
     static LoadResult LoadSceneFile(const std::filesystem::path& path);
 
-    // Main-thread-only: construct a scene from pre-validated JSON.
     static bool ConstructScene(Scene& scene, LoadResult& result,
                                std::function<void(float)> progressCallback = nullptr);