fragments.hh

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/*
 
MIT License
 
Copyright (c) 2022 PCSX-Redux authors
 
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
 
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
 
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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SOFTWARE.
 
*/
 
#pragma once
 
#include <EASTL/array.h>
#include <EASTL/utility.h>
#include <stdint.h>
 
#include "psyqo/primitive-concept.hh"
 
namespace psyqo {
 
namespace Fragments {
 
template <Primitive Prim>
struct SimpleFragment {
    constexpr size_t maxSize() const { return 1; }
    template <typename... Args>
    SimpleFragment(Args &&...args) : primitive(eastl::forward<Args>(args)...) {
        static_assert(sizeof(*this) == (sizeof(uint32_t) + sizeof(Prim)), "Spurious padding in simple fragment");
    }
    explicit SimpleFragment(const SimpleFragment &) = default;
    typedef Prim FragmentBaseType;
    constexpr size_t getActualFragmentSize() const { return sizeof(Prim) / sizeof(uint32_t); }
    uint32_t head;
    Prim primitive;
};
 
template <Primitive Prim, size_t N>
struct FixedFragment {
    constexpr size_t maxSize() const { return N; }
    FixedFragment() {
        static_assert(sizeof(*this) == (sizeof(unsigned) + sizeof(uint32_t) + sizeof(Prim) * N),
                      "Spurious padding in fixed fragment");
    }
    explicit FixedFragment(const FixedFragment &) = default;
    typedef Prim FragmentBaseType;
    size_t getActualFragmentSize() const { return (sizeof(Prim) * count) / sizeof(uint32_t); }
    unsigned count = N;
    uint32_t head;
    eastl::array<Prim, N> primitives;
};
 
template <Primitive P, Primitive Prim, size_t N>
struct FixedFragmentWithPrologue {
    constexpr size_t maxSize() const { return N; }
    FixedFragmentWithPrologue() {
        static_assert(sizeof(*this) == (sizeof(unsigned) + sizeof(uint32_t) + sizeof(P) + sizeof(Prim) * N),
                      "Spurious padding in fixed fragment");
    }
    explicit FixedFragmentWithPrologue(const FixedFragmentWithPrologue &) = default;
    typedef Prim FragmentBaseType;
    size_t getActualFragmentSize() const { return (sizeof(P) + sizeof(Prim) * count) / sizeof(uint32_t); }
    unsigned count = N;
    uint32_t head;
    P prologue;
    eastl::array<Prim, N> primitives;
};
 
}  // namespace Fragments
 
}  // namespace psyqo