src/dawn/native/TintUtils.h

// Copyright 2021 The Dawn & Tint Authors
//
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#ifndef SRC_DAWN_NATIVE_TINTUTILS_H_
#define SRC_DAWN_NATIVE_TINTUTILS_H_

#include <functional>
#include <unordered_map>

#include "dawn/common/NonCopyable.h"
#include "dawn/native/BindingInfo.h"
#include "dawn/native/IntegerTypes.h"
#include "dawn/native/stream/Stream.h"

#include "tint/tint.h"

namespace dawn::native {

class DeviceBase;
class PipelineLayoutBase;
struct ProgrammableStage;
class RenderPipelineBase;

tint::VertexPullingConfig BuildVertexPullingTransformConfig(
    const RenderPipelineBase& renderPipeline,
    BindGroupIndex pullingBufferBindingSet);

std::unordered_map<tint::OverrideId, double> BuildSubstituteOverridesTransformConfig(
    const ProgrammableStage& stage);

// Uses tint::ForeachField when available to implement the stream::Stream trait for types.
template <typename T>
    requires(tint::HasReflection<T>)
class stream::Stream<T> {
  public:
    static void Write(stream::Sink* s, const T& v) {
        tint::ForeachField(v, [&](const auto& f) { StreamIn(s, f); });
    }
    static MaybeError Read(stream::Source* s, T* v) {
        MaybeError error = {};
        tint::ForeachField(*v, [&](auto& f) {
            if (!error.IsError()) {
                error = StreamOut(s, &f);
            }
        });
        return error;
    }
};

constexpr tint::BindingPoint ToTint(const BindingSlot& slot) {
    return {static_cast<uint32_t>(slot.group), static_cast<uint32_t>(slot.binding)};
}

constexpr BindingSlot FromTint(const tint::BindingPoint& tintBindingPoint) {
    return {{BindGroupIndex(tintBindingPoint.group), BindingNumber(tintBindingPoint.binding)}};
}

}  // namespace dawn::native

#endif  // SRC_DAWN_NATIVE_TINTUTILS_H_