src/dawn/native/vulkan/PipelineVk.h

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// File containing utilities common to both types of pipelines. However adding a base class doesn't
// work as well as one would hope because we would want to use diamond inheritance and that's to
// brittle.

#ifndef SRC_DAWN_NATIVE_VULKAN_PIPELINEVK_H_
#define SRC_DAWN_NATIVE_VULKAN_PIPELINEVK_H_

#include <utility>

#include "src/dawn/native/vulkan/PipelineLayoutVk.h"

namespace dawn::native::vulkan {

// The pipeline layouts are specialized per-pipeline to use a tight bound on the number of push
// constants used, so store both handles (the pipeline and specialized layout) together.
struct PipelineHandles {
    VkPipeline pipeline = VK_NULL_HANDLE;
    VkPipelineLayout layout = VK_NULL_HANDLE;
};

// Both types of pipelines need similar specialization information.
struct CommonPipelineSpecialization {
    PipelineLayout::Specialization layout;
    absl::flat_hash_set<APIBindPoint> ycbcrExternalTextures = {};

    template <typename H>
    friend H AbslHashValue(H h, const CommonPipelineSpecialization& s) {
        return H::combine(std::move(h), s.layout, s.ycbcrExternalTextures);
    }
    bool operator==(const CommonPipelineSpecialization& other) const = default;
};

}  // namespace dawn::native::vulkan

#endif  // SRC_DAWN_NATIVE_VULKAN_PIPELINEVK_H_