#include "Rendering/Shadow/DirectionalShadowData.h"

namespace XCEngine {
namespace Rendering {

RenderDirectionalShadowData BuildRenderDirectionalShadowData(
    const DirectionalShadowRenderPlan& plan,
    RHI::RHIResourceView* shadowMapView) {
    RenderDirectionalShadowData shadowData = {};
    if (!plan.IsValid() || shadowMapView == nullptr) {
        return shadowData;
    }

    shadowData.enabled = true;
    shadowData.viewProjection = plan.cameraData.viewProjection;
    shadowData.shadowMap = shadowMapView;
    const float texelWorldSize = plan.texelWorldSize > Math::EPSILON
        ? plan.texelWorldSize
        : (plan.orthographicHalfExtent > Math::EPSILON && plan.mapWidth > 0u
            ? (plan.orthographicHalfExtent * 2.0f) / static_cast<float>(plan.mapWidth)
            : 0.0f);
    shadowData.mapMetrics.inverseMapSize = Math::Vector2(
        1.0f / static_cast<float>(plan.mapWidth),
        1.0f / static_cast<float>(plan.mapHeight));
    shadowData.mapMetrics.worldTexelSize = texelWorldSize;
    shadowData.sampling.enabled = 1.0f;
    shadowData.sampling.settings = plan.sampling;
    shadowData.casterBias.settings = plan.casterBias;
    return shadowData;
}

} // namespace Rendering
} // namespace XCEngine