Unity使用C#修改图片分辨率
发表于2018-11-21
Unity每个项目都需要使用同一张图的不同的分辨率 icon，对于这种情况只需要考虑留一张最大分辨率的图片即可，然后在使用的时候直接修改图片的分辨率，用完还能删除掉，这样既方便又能节省不少空间。直接给大家上实现脚本。
修改图片分辨的方法：
public static Texture2D ReSetTextureSize(Texture2D tex, int width, int height)
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var rendTex = new RenderTexture(width, height, 24, RenderTextureFormat.ARGB32);
rendTex.Create();
Graphics.SetRenderTarget(rendTex);
GL.PushMatrix();
GL.Clear(true, true, Color.clear);
GL.PopMatrix();
var mat = new Material(Shader.Find("Unlit/Transparent"));
mat.mainTexture = tex;
Graphics.SetRenderTarget(rendTex);
GL.PushMatrix();
GL.LoadOrtho();
mat.SetPass(0);
GL.Begin(GL.QUADS);
GL.TexCoord2(0, 0);
GL.Vertex3(0, 0, 0);
GL.TexCoord2(0, 1);
GL.Vertex3(0, 1, 0);
GL.TexCoord2(1, 1);
GL.Vertex3(1, 1, 0);
GL.TexCoord2(1, 0);
GL.Vertex3(1, 0, 0);
GL.End();
GL.PopMatrix();
var finalTex = new Texture2D(rendTex.width, rendTex.height, TextureFormat.ARGB32, false);
RenderTexture.active = rendTex;
finalTex.ReadPixels(new Rect(0, 0, finalTex.width, finalTex.height), 0, 0);
finalTex.Apply();
return finalTex;
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图片的保存方法：
public static void SaveTexture(Texture2D tex, string toPath)
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using (var fs = File.OpenWrite(toPath))
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var bytes = tex.EncodeToPNG();
fs.Write(bytes, 0, bytes.Length);
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图片自动压缩功能：
public static bool CompressTexture(params string[] texturePath)
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var shell = BabySystem.babyFrameWorkAbsolutePath + "TextureTools/";
if (BabySystem.activeBuildTarget == BuildTarget.iOS)
shell = shell + "mac/pngquant";
else
shell = shell + "win/pngquant.exe";
var strCmdText = "--ext .png " + "--force -- " + string.Join(" ",texturePath);
System.Diagnostics.Process process = new System.Diagnostics.Process();
System.Diagnostics.ProcessStartInfo startInfo = new System.Diagnostics.ProcessStartInfo();
startInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
startInfo.FileName = shell;
startInfo.Arguments = strCmdText;
process.StartInfo = startInfo;
process.Start();
process.WaitForExit();
int ExitCode = process.ExitCode;
if (ExitCode != 0)
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Debug.LogError("Run CMD CompressTexture Failed : "+ExitCode);
return false;
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return true;
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