mgl_render_types.h

[詳解]

// SPDX-License-Identifier: Zlib
/* ------------------------------------------------------------------------- */
/* ------------------------------------------------------------------------- */
 
#ifndef INCGUARD_MGL_RENDER_TYPES_H_1607409333
#define INCGUARD_MGL_RENDER_TYPES_H_1607409333
 
#include <mgl/hash/mgl_hash_fnv1a.h>
 
#include <cstddef>
 
namespace MGL::Render
{
enum class RendererType : uint32_t {};
 
/* ------------------------------------------------------------------------- */
/* ------------------------------------------------------------------------- */
[[nodiscard]] constexpr RendererType MakeRendererType(const char *type) noexcept
{
    return RendererType{Hash::FNV1a(type)};
}
 
enum class PixelFormat : uint32_t
{
    Unknown,        
    RGBA8_UNorm,    
    BGRA8_UNorm,    
 
    B5G6R5_UNorm,    
    A1BGR5_UNorm,    
    BGR5A1_UNorm,    
    ABGR4_UNorm,     
    BGRA4_UNorm,     
 
    A8_UNorm,        
 
    // NOTE:
    //  全てを列挙するときりがないので，とりあえず使いそうなもののみを選定．
    //  ここに無くてもレンダラデリゲート側で使用することは可能．（アプリケーション側からはUnknownになる）
 
    Invalid = 0xFFFFFFFF  
};
 
enum class SamplerType : uint8_t
{
    Invalid,    
    Nearest,    
    Linear,     
};
 
enum class BlendMode : uint8_t
{
    None,     
    Alpha,    
};
 
/* ------------------------------------------------------------------------- */
/* ------------------------------------------------------------------------- */
[[nodiscard]] constexpr size_t GetPixelPerBytes(PixelFormat format) noexcept
{
    switch (format)
    {
        case PixelFormat::RGBA8_UNorm:
        case PixelFormat::BGRA8_UNorm:
            return 4;
 
        case PixelFormat::B5G6R5_UNorm:
        case PixelFormat::A1BGR5_UNorm:
        case PixelFormat::BGR5A1_UNorm:
        case PixelFormat::ABGR4_UNorm:
        case PixelFormat::BGRA4_UNorm:
            return 2;
 
        case PixelFormat::A8_UNorm:
            return 1;
 
        case PixelFormat::Unknown:
        case PixelFormat::Invalid:
            return 0;
    }
 
    return 0;
}
}    // namespace MGL::Render
 
#endif    // INCGUARD_MGL_RENDER_TYPES_H_1607409333
 
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