Unity实现相机截图功能

最近做项目的时候需要在游戏里截一张高清截图，研究了一下写成脚本，方便以后使用。

脚本可以自定义分辨率，用相机截高清截图。可以用代码动态截图，也可以在编辑模式下截图。

注意截图宽高比要正确，宽高比不正确时可能会出问题。

截图效果：

脚本:

cameracapture.cs

using unityengine;
using system.io;
 
/// <summary>
/// 相机截图
/// <para>zhangyu 2018-07-06</para>
/// </summary>
public class cameracapture : monobehaviour {
 
 // 截图尺寸
 public enum capturesize {
 camerasize,
 screenresolution,
 fixedsize
 }
 
 // 目标摄像机
 public camera targetcamera;
 // 截图尺寸
 public capturesize capturesize = capturesize.camerasize;
 // 像素尺寸
 public vector2 pixelsize;
 // 保存路径
 public string savepath = "streamingassets/";
 // 文件名称
 public string filename = "cameracapture.png";
 
 #if unity_editor
 private void reset() {
 targetcamera = getcomponent<camera>();
 pixelsize = new vector2(screen.currentresolution.width, screen.currentresolution.height);
 }
 #endif
 
 /// <summary> 保存截图 </summary>
 /// <param name="camera">目标摄像机</param>
 public void savecapture() {
 vector2 size = pixelsize;
 if (capturesize == capturesize.camerasize) {
  size = new vector2(targetcamera.pixelwidth, targetcamera.pixelheight);
 } else if (capturesize == capturesize.screenresolution) {
  size = new vector2(screen.currentresolution.width, screen.currentresolution.height);
 }
 string path = application.datapath + "/" + savepath + filename;
 savetexture(path, capture(targetcamera, (int)size.x, (int)size.y));
 }
 
 /// <summary> 相机截图 </summary>
 /// <param name="camera">目标相机</param>
 public static texture2d capture(camera camera) {
 return capture(camera, screen.width, screen.height);
 }
 
 /// <summary> 相机截图 </summary>
 /// <param name="camera">目标相机</param>
 /// <param name="width">宽度</param>
 /// <param name="height">高度</param>
 public static texture2d capture(camera camera, int width, int height) {
 rendertexture rt = new rendertexture(width, height, 0);
 rt.depth = 24;
 rt.antialiasing = 8;
 camera.targettexture = rt;
 camera.renderdontrestore();
 rendertexture.active = rt;
 texture2d texture = new texture2d(width, height, textureformat.argb32, false, true);
 rect rect = new rect(0, 0, width, height);
 texture.readpixels(rect, 0, 0);
 texture.filtermode = filtermode.point;
 texture.apply();
 camera.targettexture = null;
 rendertexture.active = null;
 destroy(rt);
 return texture;
 }
 
 /// <summary> 保存贴图 </summary>
 /// <param name="path">保存路径</param>
 /// <param name="texture">texture2d</param>
 public static void savetexture(string path, texture2d texture) {
 file.writeallbytes(path, texture.encodetopng());
 #if unity_editor
 debug.log("已保存截图到:" + path);
 #endif
 }
 
}

脚本编辑器:

cameracaptureeditor.cs

using unityeditor;
using unityengine;
 
/// <summary>
/// 相机截图 编辑器
/// <para>zhangyu 2018-07-06</para>
/// </summary>
[caneditmultipleobjects]
[customeditor(typeof(cameracapture))]
public class cameracaptureeditor : editor {
 
 public override void oninspectorgui() {
 // 属性
 cameracapture script = (cameracapture)target;
 int selected = (int)script.capturesize;
 
 // 重绘gui
 editorgui.beginchangecheck();
 drawproperty("targetcamera", "目标像机");
 string[] options = new string[] { "像机尺寸", "屏幕尺寸", "固定尺寸"};
 selected = editorguilayout.popup("截图尺寸", selected, options, guilayout.expandwidth(true));
 script.capturesize = (cameracapture.capturesize)selected;
 if (script.capturesize == cameracapture.capturesize.fixedsize) {
  drawproperty("pixelsize", "像素尺寸");
  editorguilayout.helpbox("请保持正确的宽高比！\n否则截图区域可能出现错误。", messagetype.info);
 }
 drawproperty("savepath", "保存路径");
 drawproperty("filename", "文件名称");
 
 // 保存截图按钮
 bool ispress = guilayout.button("保存截图", guilayout.expandwidth(true));
 if (ispress) script.savecapture();
 if (editorgui.endchangecheck()) serializedobject.applymodifiedproperties();
 }
 
 private void drawproperty(string property, string label) {
 editorguilayout.propertyfield(serializedobject.findproperty(property), new guicontent(label), true);
 }
 
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。