Unity3D的SystemInfo类，获取运行设备硬件信息（CPU、显卡、类型等）可用于手机

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  近期才发现Unity3D还有一个访问硬件设备信息的类SystemInfo。这么晚才发现，我也是醉了。今整理了一下这个类的相关内容。PS：个人整理，有不符的地方望大家指正。嘿嘿。

概述：

     UnityEngine.SystemInfo类中的属性都是只读属性，存储着运行平台的一些硬件信息，找出底层平台和硬件的功能，如：设备的名称、设备的类型、显卡的类型，显卡的名称、显卡供应商（制造商）、系统内存大小、显存大小、支持的渲染目标数量等等。我们也可以检查支持哪些RenderTexture(渲染纹理)格式(SupportsRenderTextureFormat)，CPU有多少可用的线程的(processorCount)等等。

SystemInfo类中的静态变量：

中文显示：

Rendering.CopyTextureSupport copyTextureSupport：（只读）支持多种复制纹理功能的情况。

string  deviceModel：（只读）设备的模型或模式。

string  deviceName：（只读）用户定义的设备名称。

DeviceType  deviceType：（只读）返回程序运行所在的设备类型（PC电脑、掌上型等）。

string  deviceUniqueIdentifier：（只读）设备的唯一标识符。每一台设备都有唯一的标识符。

int   graphicsDeviceID：（只读）显卡的唯一标识符ID。

string  graphicsDeviceName：（只读）显卡的名称。

Rending.GraphicsDeviceType  graphicsDeviceType：（只读）显卡的类型。

string   graphicsDeviceVendor：（只读）显卡的供应商。

int   graphicsDeviceVendorID：（只读）显卡供应商的唯一识别码ID。

string   graphicsDeviceVersion：（只读）显卡的类型和版本。

int   graphicsMemorySize：（只读）显存大小。

bool  graphicsMultiThreaded：（只读）是否支持多线程渲染？

int   graphicsShaderLevel：（只读）显卡着色器的级别。

int   maxTextureSize：（只读）支持的最大纹理大小。

NPOTSupport  npotSupport：（只读）GPU支持的NPOT纹理。

string  operatingSystem：（只读）操作系统的版本名称。

int   processorCount：（只读）当前处理器的数量。

int   processorFrequency：（只读）处理器的频率。

string  processorType：（只读）处理器的名称。

int   supportedRenderTargetCount：（只读）支持渲染多少目标纹理。

bool  supports2DArrayTextures：（只读）是否支持2D数组纹理。

bool  supports3DTextures：（只读）是否支持3D（体积）纹理。

bool  supportsAccelerometer：（只读）是否支持获取加速度计。

bool  supportsAudio：（只读）是否支持获取用于回放的音频设备。

bool  supportsComputeShaders：（只读）是否支持计算着色器。

bool  supportsGyroscope：是否支持获取陀螺仪。

bool  supportsImageEffects：（只读）是否支持图形特效。

bool  supportsInstancing：（只读）是否支持实例化GPU的Draw Call。

bool  supportsLocationService：是否支持定位功能。

bool  supportsMotionVectors：是否支持运动向量。

bool  supportsRawShadowDepthSampling：（只读）是否支持阴影深度。

bool  supportsRenderTextures：（只读）是否支持渲染纹理。

bool  supportsRenderToCubemap：（只读）是否支持立方体纹理。

bool  supportsShadows：（只读）是否支持内置阴影。

bool  supportsSparseTextures：（只读）是否支持稀疏纹理。

bool  supportsStencil：（只读）是否支持模版缓存。

bool  supportsVibration：是否支持用户触摸震动反馈。

int   systemMemorySize：（只读）系统内存大小。

string   unsupportedIdentifier：不支持运行在当前设备的SystemInfo属性值。

官方文档英文显示：

copyTextureSupport	Support for various Graphics.CopyTexture cases (Read Only).
deviceModel	The model of the device (Read Only).
deviceName	The user defined name of the device (Read Only).
deviceType	Returns the kind of device the application is running on (Read Only).
deviceUniqueIdentifier	A unique device identifier. It is guaranteed to be unique for every device (Read Only).
graphicsDeviceID	The identifier code of the graphics device (Read Only).
graphicsDeviceName	The name of the graphics device (Read Only).
graphicsDeviceType	The graphics API type used by the graphics device (Read Only).
graphicsDeviceVendor	The vendor of the graphics device (Read Only).
graphicsDeviceVendorID	The identifier code of the graphics device vendor (Read Only).
graphicsDeviceVersion	The graphics API type and driver version used by the graphics device (Read Only).
graphicsMemorySize	Amount of video memory present (Read Only).
graphicsMultiThreaded	Is graphics device using multi-threaded rendering (Read Only)?
graphicsShaderLevel	Graphics device shader capability level (Read Only).
maxTextureSize	Maximum texture size (Read Only).
npotSupport	What NPOT (non-power of two size) texture support does the GPU provide? (Read Only)
operatingSystem	Operating system name with version (Read Only).
processorCount	Number of processors present (Read Only).
processorFrequency	Processor frequency in MHz (Read Only).
processorType	Processor name (Read Only).
supportedRenderTargetCount	How many simultaneous render targets (MRTs) are supported? (Read Only)
supports2DArrayTextures	Are 2D Array textures supported? (Read Only)
supports3DTextures	Are 3D (volume) textures supported? (Read Only)
supportsAccelerometer	Is an accelerometer available on the device?
supportsAudio	Is there an Audio device available for playback?
supportsComputeShaders	Are compute shaders supported? (Read Only)
supportsGyroscope	Is a gyroscope available on the device?
supportsImageEffects	Are image effects supported? (Read Only)
supportsInstancing	Is GPU draw call instancing supported? (Read Only)
supportsLocationService	Is the device capable of reporting its location?
supportsMotionVectors	Are motion vectors supported.
supportsRawShadowDepthSampling	Is sampling raw depth from shadowmaps supported? (Read Only)
supportsRenderTextures	Are render textures supported? (Read Only)
supportsRenderToCubemap	Are cubemap render textures supported? (Read Only)
supportsShadows	Are built-in shadows supported? (Read Only)
supportsSparseTextures	Are sparse textures supported? (Read Only)
supportsStencil	Is the stencil buffer supported? (Read Only)
supportsVibration	Is the device capable of providing the user haptic feedback by vibration?
systemMemorySize	Amount of system memory present (Read Only).
unsupportedIdentifier	Value returned by SystemInfo string properties which are not supported on the current platform.

SystemInfo类中的函数：

bool SupportsRenderTextureFormat(RenderTextureFormat format);

输入一个渲染纹理的格式，判断设备是否支持这种格式

bool SupportsTextureFormat(TextureFormat format);

输入一个纹理的格式，判断设备是否支持这种格式。