XCEngine/engine/src/Rendering/Internal/RenderPipelineFactory.cpp

#include "Rendering/Internal/RenderPipelineFactory.h"

#include "Rendering/Pipelines/BuiltinForwardPipeline.h"
#include "Rendering/Pipelines/ManagedScriptableRenderPipelineAsset.h"
#include "Rendering/Pipelines/ScriptableRenderPipelineHost.h"

namespace XCEngine {
namespace Rendering {
namespace Internal {

std::shared_ptr<const RenderPipelineAsset> CreateDefaultRenderPipelineAsset() {
    return Pipelines::CreateManagedOrDefaultScriptableRenderPipelineAsset();
}

std::shared_ptr<const RenderPipelineAsset> ResolveRenderPipelineAssetOrDefault(
    std::shared_ptr<const RenderPipelineAsset> preferredAsset) {
    return preferredAsset != nullptr
        ? std::move(preferredAsset)
        : CreateDefaultRenderPipelineAsset();
}

std::unique_ptr<RenderPipeline> CreateRenderPipelineOrDefault(
    const std::shared_ptr<const RenderPipelineAsset>& preferredAsset,
    std::shared_ptr<const RenderPipelineAsset>* outResolvedAsset) {
    const std::shared_ptr<const RenderPipelineAsset> resolvedAsset =
        ResolveRenderPipelineAssetOrDefault(preferredAsset);
    if (resolvedAsset != nullptr) {
        if (std::unique_ptr<RenderPipeline> pipeline =
                resolvedAsset->CreatePipeline()) {
            if (outResolvedAsset != nullptr) {
                *outResolvedAsset = resolvedAsset;
            }
            return pipeline;
        }
    }

    const std::shared_ptr<const RenderPipelineAsset> fallbackAsset =
        CreateDefaultRenderPipelineAsset();
    if (fallbackAsset != nullptr &&
        fallbackAsset != resolvedAsset) {
        if (std::unique_ptr<RenderPipeline> pipeline =
                fallbackAsset->CreatePipeline()) {
            if (outResolvedAsset != nullptr) {
                *outResolvedAsset = fallbackAsset;
            }
            return pipeline;
        }
    }

    if (outResolvedAsset != nullptr) {
        *outResolvedAsset =
            fallbackAsset != nullptr
                ? fallbackAsset
                : resolvedAsset;
    }
    return std::make_unique<Pipelines::ScriptableRenderPipelineHost>();
}

std::unique_ptr<NativeSceneRenderer> CreateDefaultNativeSceneRenderer() {
    return std::make_unique<Pipelines::BuiltinForwardPipeline>();
}

} // namespace Internal
} // namespace Rendering
} // namespace XCEngine