Function CopyTextureDataMipmapLevel

engine/graphics/src/dx12/graphics_dx12.cpp:1260–1292

    }

    static void CopyTextureDataMipmapLevel(const TextureParams& params, TextureFormat format_dst, TextureFormat format_src,
        const D3D12_PLACED_SUBRESOURCE_FOOTPRINT* layouts, const uint32_t* num_rows, uint32_t array_count,
        uint32_t mipmap_count, const uint32_t* slice_row_pitch, const uint8_t* pixels, uint8_t* upload_data, uint32_t mipmap)
    {
        const uint8_t bpp_dst = GetTextureFormatBitsPerPixel(format_dst) / 8;
        const uint8_t bpp_src = GetTextureFormatBitsPerPixel(format_src) / 8;
        const uint64_t srcRowPitch = slice_row_pitch[0];  // Assuming only one mip being uploaded
        const uint32_t copy_width = params.m_Width;
        const uint32_t copy_height = params.m_Height;
        const uint32_t copy_x = params.m_X;
        const uint32_t copy_y = params.m_Y;

        for (uint32_t array = 0; array < array_count; ++array)
        {
            const D3D12_PLACED_SUBRESOURCE_FOOTPRINT& layout = layouts[array];
            const uint64_t dstRowPitch = layout.Footprint.RowPitch;
            const uint32_t depth = layout.Footprint.Depth;

            uint8_t* dst = upload_data + layout.Offset;
            const uint8_t* src = pixels + array * copy_height * srcRowPitch * depth;

            for (uint32_t z = 0; z < depth; ++z)
            {
                for (uint32_t row = 0; row < copy_height; ++row)
                {
                    const uint8_t* src_row = src + (z * copy_height + row) * srcRowPitch;
                    uint8_t* dst_row = dst + (z * copy_height + row) * dstRowPitch;

                    memcpy(dst_row, src_row, copy_width * bpp_dst);
                }
            }
        }
    }

    static inline void CreateOneTimeCommandList(ID3D12Device* device, DX12OneTimeCommandList* cmd_list)
    {