Version: 2021.3

Texture.updateCount

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public uint updateCount ;

描述

This counter is incremented when the Texture is updated.

注意:如果从 GPU 端进行更新,您应自行使计数器递增。(例如,在通过 Blit 操作进入 RenderTexture 时)。(请参阅 IncrementUpdateCount)。

using UnityEngine;
using System.Collections.Generic;

public class MyTextureCache { struct TextureCacheMeta { internal int index; internal uint updateCount; }

Dictionary<Texture, TextureCacheMeta> m_TextureMetas = new Dictionary<Texture, TextureCacheMeta>(); RenderTexture m_Cache;

public Texture cache { get { return m_Cache; } }

public int CacheTexture(Texture Texture) { var index = -1; TextureCacheMeta meta; if (m_TextureMetas.TryGetValue(Texture, out meta)) { if (meta.updateCount != Texture.updateCount) { // Texture has changed since last caching // So blit again into the cache Texture BlitTextureAt(meta.index, Texture); meta.updateCount = Texture.updateCount; m_TextureMetas[Texture] = meta; } } else { index = GetNextIndex(); if (index < 0) { Debug.LogError("Invalid index"); return -1; }

m_TextureMetas[Texture] = new TextureCacheMeta { index = index, updateCount = Texture.updateCount }; } return index; }

void BlitTextureAt(int index, Texture Texture) { /* copy pixels in cache */ } int GetNextIndex() { return -1; /* Get next index to use in the cache */ } }