MemoryInfo.cs

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

namespace HKI.Core.Debuging
{
    public class MemoryInfo : MonoBehaviour
    {
        // Public variables
        [SerializeField] Color32 GraphColor = new Color(0.2f, 0.6f, 1.0f, 1.0f);
        [SerializeField] Text TotalMemoryUsageText = null;
        [SerializeField] Text MonoMemoryUsageText = null;

        [SerializeField] RawImage GraphImage = null;
        
        [SerializeField] int GraphWidth = 200;
        [SerializeField] int GraphHeight = 50;
        
        // private variables
        const string format = "n2";
        const float mb = 1024.0f * 1024.0f;

        Color[] cleanGraph = null;
        Texture2D graphTexture = null;
        List<int> memoryGraphBarsVal = null;

        int graphDataPoints = 200;

        // Awake function
        void Awake()
        {
            graphTexture = new Texture2D(GraphWidth, GraphHeight);
            graphTexture.wrapMode = TextureWrapMode.Clamp;
            graphTexture.filterMode = FilterMode.Point;

            graphTexture.Apply();

            cleanGraph = new Color[GraphWidth * GraphHeight];

            graphDataPoints = GraphWidth / 2;
            memoryGraphBarsVal = new List<int>(graphDataPoints);

            for (int i = 0; i < graphDataPoints; i++)
                memoryGraphBarsVal.Add(0);

            graphTexture = new Texture2D(GraphWidth, GraphHeight);

            Color emptyColor = new Color(0, 0, 0, 0);

            for (int i = 0; i < GraphWidth; i++)
            {
                for (int j = 0; j < GraphHeight; j++)
                    cleanGraph[i * GraphHeight + j] = emptyColor;
            }

            graphTexture.SetPixels(cleanGraph);
            graphTexture.Apply();
            GraphImage.texture = graphTexture;

            if (TotalMemoryUsageText != null && MonoMemoryUsageText != null)
            {
                TotalMemoryUsageText.text = (((float)UnityEngine.Profiling.Profiler.GetTotalAllocatedMemoryLong()) / mb).ToString(format);
                MonoMemoryUsageText.text = (((float)UnityEngine.Profiling.Profiler.GetMonoUsedSizeLong()) / mb).ToString(format);
            }
        }

        // Interface function
        public void UpdateInfo()
        {
            memoryGraphBarsVal.Add(Mathf.RoundToInt(UnityEngine.Profiling.Profiler.GetTotalAllocatedMemoryLong() / mb));
            memoryGraphBarsVal.RemoveAt(0);

            float max = 100;
            for (int i = 0; i < memoryGraphBarsVal.Count; i++)
            {
                if (memoryGraphBarsVal[i] > max)
                    max = memoryGraphBarsVal[i];
            }

            graphTexture.SetPixels(cleanGraph);

            for (int i = 0; i < GraphWidth; i += 2)
            {
                for (int j = 0; j < (int)((memoryGraphBarsVal[i / 2] / max) * GraphHeight); j++)
                {
                    graphTexture.SetPixel(i, j, GraphColor);
                    graphTexture.SetPixel(i + 1, j, GraphColor);
                }
            }

            graphTexture.wrapMode = TextureWrapMode.Clamp;
            graphTexture.filterMode = FilterMode.Point;
            graphTexture.Apply();
            

            if (TotalMemoryUsageText != null && MonoMemoryUsageText != null)
            {
                TotalMemoryUsageText.text = (((float)UnityEngine.Profiling.Profiler.GetTotalAllocatedMemoryLong()) / mb).ToString(format);
                MonoMemoryUsageText.text = (((float)UnityEngine.Profiling.Profiler.GetMonoUsedSizeLong()) / mb).ToString(format);
            }
        }
    }
}