get_size_bytes()

size_t MayaFlux::Core::VKImage::get_size_bytes

(

)

const

Get total size in bytes (for memory allocation)

Returns

Estimated size in bytes

Definition at line 107 of file VKImage.cpp.

{
    size_t bytes_per_pixel = 0;
 
    switch (m_format) {
    case vk::Format::eR8Unorm:
    case vk::Format::eR8Snorm:
    case vk::Format::eR8Uint:
    case vk::Format::eR8Sint:
        bytes_per_pixel = 1;
        break;
 
    case vk::Format::eR8G8Unorm:
    case vk::Format::eR8G8Snorm:
    case vk::Format::eR8G8Uint:
    case vk::Format::eR8G8Sint:
    case vk::Format::eR16Unorm:
    case vk::Format::eR16Snorm:
    case vk::Format::eR16Uint:
    case vk::Format::eR16Sint:
    case vk::Format::eR16Sfloat:
        bytes_per_pixel = 2;
        break;
 
    case vk::Format::eR8G8B8Unorm:
    case vk::Format::eR8G8B8Snorm:
    case vk::Format::eR8G8B8Uint:
    case vk::Format::eR8G8B8Sint:
    case vk::Format::eB8G8R8Unorm:
        bytes_per_pixel = 3;
        break;
 
    case vk::Format::eR8G8B8A8Unorm:
    case vk::Format::eR8G8B8A8Snorm:
    case vk::Format::eR8G8B8A8Uint:
    case vk::Format::eR8G8B8A8Sint:
    case vk::Format::eR8G8B8A8Srgb:
    case vk::Format::eB8G8R8A8Unorm:
    case vk::Format::eB8G8R8A8Srgb:
    case vk::Format::eR16G16Unorm:
    case vk::Format::eR16G16Snorm:
    case vk::Format::eR16G16Uint:
    case vk::Format::eR16G16Sint:
    case vk::Format::eR16G16Sfloat:
    case vk::Format::eR32Uint:
    case vk::Format::eR32Sint:
    case vk::Format::eR32Sfloat:
    case vk::Format::eD24UnormS8Uint:
    case vk::Format::eD32Sfloat:
        bytes_per_pixel = 4;
        break;
 
    case vk::Format::eR16G16B16A16Unorm:
    case vk::Format::eR16G16B16A16Snorm:
    case vk::Format::eR16G16B16A16Uint:
    case vk::Format::eR16G16B16A16Sint:
    case vk::Format::eR16G16B16A16Sfloat:
    case vk::Format::eR32G32Uint:
    case vk::Format::eR32G32Sint:
    case vk::Format::eR32G32Sfloat:
        bytes_per_pixel = 8;
        break;
 
    case vk::Format::eR32G32B32Uint:
    case vk::Format::eR32G32B32Sint:
    case vk::Format::eR32G32B32Sfloat:
        bytes_per_pixel = 12;
        break;
 
    case vk::Format::eR32G32B32A32Uint:
    case vk::Format::eR32G32B32A32Sint:
    case vk::Format::eR32G32B32A32Sfloat:
        bytes_per_pixel = 16;
        break;
 
    default:
        // Fallback: assume 4 bytes per pixel for unknown formats
        bytes_per_pixel = 4;
        MF_WARN(Journal::Component::Core, Journal::Context::GraphicsBackend,
            "Unknown format for size calculation, assuming 4 bytes/pixel");
        break;
    }
 
    size_t total_size = 0;
    uint32_t mip_width = m_width;
    uint32_t mip_height = m_height;
    uint32_t mip_depth = m_depth;
 
    for (uint32_t i = 0; i < m_mip_levels; ++i) {
        total_size += static_cast<size_t>(mip_width) * mip_height * mip_depth * bytes_per_pixel;
 
        mip_width = std::max(1U, mip_width / 2);
        mip_height = std::max(1U, mip_height / 2);
        mip_depth = std::max(1U, mip_depth / 2);
    }
 
    // Multiply by array layers (e.g., 6 for cubemaps)
    total_size *= m_array_layers;
 
    return total_size;
}

References MayaFlux::Journal::Core, MayaFlux::Journal::GraphicsBackend, m_array_layers, m_depth, m_format, m_height, m_mip_levels, m_width, and MF_WARN.