PostProcess.h

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#pragma once
 
#include "ncengine/asset/AssetViews.h"
#include "ncmath/Vector.h"
 
#include <limits>
#include <variant>
 
namespace nc
{
struct PostProcessPassFlag
{
    using type = uint64_t;
 
    static constexpr auto None    = type{0};
    static constexpr auto Outline = type{1 << 0};
    static constexpr auto Fxaa    = type{1 << 1};
    static constexpr auto Noise   = type{1 << 2};
};
 
using PostProcessEffectId = uint32_t;
 
using PostProcessEffectPassFlags = PostProcessPassFlag::type;
 
constexpr auto NullPostProcessEffectId = std::numeric_limits<PostProcessEffectId>::max();
 
constexpr auto OutlinedToonEffectId = PostProcessEffectId{0};
 
constexpr auto OutlinedToonEffectPassFlags = PostProcessPassFlag::Outline | PostProcessPassFlag::Fxaa | PostProcessPassFlag::Noise;
 
struct EmptyPassProperties {};
 
struct OutlinePassProperties
{
    Vector3 color = Vector3::Zero();
    float width = 1.0f;
    float depthThreshold = 0.8f;
    float viewDirDepthThreshold = 0.4f;
    float normalThreshold = 0.4f;
};
 
struct NoisePassProperties
{
    Vector3 maskGradientStart = Vector3::Zero();
    float maskGradientAmount = 0.1f;
    Vector3 maskGradientEnd = Vector3::One();
    asset::TextureView noiseTex = asset::TextureView{};
    float noiseTexAmount = 0.1f;
    float noiseTexTiling = 1.0f;
};
 
using PostProcessPassProperties = std::variant<EmptyPassProperties,
                                               OutlinePassProperties,
                                               NoisePassProperties>;
 
auto PassHasProperties(PostProcessPassFlag::type pass) -> bool;
 
auto MakeDefaultPassProperties(PostProcessPassFlag::type pass) -> PostProcessPassProperties;
} // namespace nc