editor_render_hooks.h

#pragma once
 
#include <cstdint>
#include <string>
 
#include "core/reflect.h"
 
#include "resource/asset/mesh_asset.h"
#include "resource/asset/material_asset.h"
#include "system/render/render_backend.h"
 
namespace Vkm::Engine {
 
class ResourceManager;

enum class PreviewBackground : uint8_t {
    Dark,
    Grey,  
    Sky,   
 
    Count  
};

struct PreviewRequest {
    uint64_t          key      = 0;      
    uint32_t          size     = 256;    
    MeshHandle        mesh;
    MaterialHandle    material;
    float             yawDeg   = 35.0f;
    float             pitchDeg = 20.0f;
    float             distance = 3.0f;   
    PreviewBackground background = PreviewBackground::Dark;
    float             lightYawDeg = 0.0f;  
};

using GpuTextureId = uint64_t;

class EditorRenderHooks {
    public:
        EditorRenderHooks() = default;
        virtual ~EditorRenderHooks() = default;
 
        EditorRenderHooks(const EditorRenderHooks& other) = delete;
        EditorRenderHooks& operator=(const EditorRenderHooks& other) = delete;
 
        EditorRenderHooks(EditorRenderHooks && other) = delete;
        EditorRenderHooks& operator=(EditorRenderHooks && other) = delete;
 
    public:
        virtual GpuTextureId renderPreview(
            const PreviewRequest& request,
            const ResourceManager& resources
        ) = 0;

        virtual GpuTextureId previewTexture(uint64_t key) const = 0;

        virtual void releasePreview(uint64_t key) = 0;

        virtual void releaseAllPreviews() = 0;

        virtual GpuTextureId textureId(const TextureHandle& handle) const = 0;

        virtual GpuTextureId ensureTexture(const TextureHandle& handle, const ResourceManager& resources) = 0;

        virtual GpuTextureId chromeImage(const std::string& path) = 0;
};

inline EditorRenderHooks* editorRenderHooks(RenderBackend* backend) {
    return backend ? backend->editorHooks() : nullptr;
}
 
} // namespace Vkm::Engine
 
VKM_ENUM_NAMES(::Vkm::Engine::PreviewBackground, "Dark", "Grey", "Sky")