Unity3D研究院之动态分辨率降低渲染开销（一百一十三）

    ScalableBufferManager.ResizeBuffers(m_widthScale, m_heightScale);

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class DynamicResolutionTest : MonoBehaviour
{
    public Text screenText;

    FrameTiming[] frameTimings = new FrameTiming[3];

    public float maxResolutionWidthScale = 1.0f;
    public float maxResolutionHeightScale = 1.0f;
    public float minResolutionWidthScale = 0.5f;
    public float minResolutionHeightScale = 0.5f;
    public float scaleWidthIncrement = 0.1f;
    public float scaleHeightIncrement = 0.1f;

    float m_widthScale = 1.0f;
    float m_heightScale = 1.0f;

    // Variables for dynamic resolution algorithm that persist across frames
    uint m_frameCount = 0;

    const uint kNumFrameTimings = 2;

    double m_gpuFrameTime;
    double m_cpuFrameTime;

    // Use this for initialization
    void Start()
    {
        int rezWidth = (int)Mathf.Ceil(ScalableBufferManager.widthScaleFactor * Screen.currentResolution.width);
        int rezHeight = (int)Mathf.Ceil(ScalableBufferManager.heightScaleFactor * Screen.currentResolution.height);
        screenText.text = string.Format("Scale: {0:F3}x{1:F3}nResolution: {2}x{3}n",
            m_widthScale,
            m_heightScale,
            rezWidth,
            rezHeight);
    }


    private void OnGUI()
    {
        float oldWidthScale = m_widthScale;
        float oldHeightScale = m_heightScale;

        // One finger lowers the resolution
        if (GUILayout.Button("<size=100>--</size>"))
        {
            m_heightScale = Mathf.Max(minResolutionHeightScale, m_heightScale - scaleHeightIncrement);
            m_widthScale = Mathf.Max(minResolutionWidthScale, m_widthScale - scaleWidthIncrement);
        }

        // Two fingers raises the resolution
        if (GUILayout.Button("<size=100>++</size>"))
        {
            m_heightScale = Mathf.Min(maxResolutionHeightScale, m_heightScale + scaleHeightIncrement);
            m_widthScale = Mathf.Min(maxResolutionWidthScale, m_widthScale + scaleWidthIncrement);
        }

        if (m_widthScale != oldWidthScale || m_heightScale != oldHeightScale)
        {
            ScalableBufferManager.ResizeBuffers(m_widthScale, m_heightScale);
        }
    }
    // Update is called once per frame
    void Update()
    {
        
        DetermineResolution();
        int rezWidth = (int)Mathf.Ceil(ScalableBufferManager.widthScaleFactor * Screen.currentResolution.width);
        int rezHeight = (int)Mathf.Ceil(ScalableBufferManager.heightScaleFactor * Screen.currentResolution.height);
        screenText.text = string.Format("Scale: {0:F3}x{1:F3}n动态分辨率: {2}x{3}nScaleFactor: {4:F3}x{5:F3}nGPU: {6:F3} CPU: {7:F3}",
            m_widthScale,
            m_heightScale,
            rezWidth,
            rezHeight,
            ScalableBufferManager.widthScaleFactor,
            ScalableBufferManager.heightScaleFactor,
            m_gpuFrameTime,
            m_cpuFrameTime);
    }

    // Estimate the next frame time and update the resolution scale if necessary.
    private void DetermineResolution()
    {
        ++m_frameCount;
        if (m_frameCount <= kNumFrameTimings)
        {
            return;
        }
        FrameTimingManager.CaptureFrameTimings();
        FrameTimingManager.GetLatestTimings(kNumFrameTimings, frameTimings);
        if (frameTimings.Length < kNumFrameTimings)
        {
            Debug.LogFormat("Skipping frame {0}, didn't get enough frame timings.",
                m_frameCount);

            return;
        }

        m_gpuFrameTime = (double)frameTimings[0].gpuFrameTime;
        m_cpuFrameTime = (double)frameTimings[0].cpuFrameTime;
    }
}