EditorGUI.DrawPreviewTexture

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public static void DrawPreviewTexture (Rect position, Texture image, Material mat= null, ScaleMode scaleMode= ScaleMode.StretchToFill, float imageAspect= 0, float mipLevel= -1, Rendering.ColorWriteMask colorWriteMask= ColorWriteMask.All);

Parameters

position屏幕上要在其中绘制纹理的矩形。
image要显示的 Texture
mat绘制纹理时要使用的材质。
scaleMode当图像的宽高比不适合要绘制的宽高比时,如何缩放图像。
imageAspect用于源图像的宽高比。如果为 0(默认值),则使用图像的宽高比。
mipLevel要进行采样的 Mip 级别。如果为负值,将对纹理进行正常采样。 设置材质 _Mip 属性。
colorWriteMaskSpecifies which color components of image will get written.

Description

在矩形内绘制纹理。

如果 mat 为 null(默认值),将为 RGBM 或 doubleLDR 光照贴图或法线贴图选择适当的材质, 否则将选择回退 blit 材质。


Preview Texture in an Editor Window.

// Load a texture, display the texture, display its alpha channel and
// show a preview of the inverted texture
using UnityEditor;
using UnityEngine;

class EditorGUITextures : EditorWindow { Texture2D texture; Texture2D invertedTexture; bool showInverted = false;

[MenuItem("Examples/Texture Previewer")] static void Init() { var window = GetWindow<EditorGUITextures>("Texture Previewer"); window.position = new Rect(0, 0, 400, 200); window.Show(); }

void OnGUI() { texture = (Texture2D)EditorGUI.ObjectField(new Rect(3, 3, 200, 20), "Add a Texture:", texture, typeof(Texture2D)); if (GUI.Button(new Rect(208, 3, position.width - 210, 20), "Process Inverted")) { if (invertedTexture) DestroyImmediate(invertedTexture); //Copy the new texture invertedTexture = new Texture2D(texture.width, texture.height, texture.format, (texture.mipmapCount != 0)); for (int m = 0; m < texture.mipmapCount; m++) invertedTexture.SetPixels(texture.GetPixels(m), m); InvertColors(); showInverted = true; } if (texture) { EditorGUI.PrefixLabel(new Rect(25, 45, 100, 15), 0, new GUIContent("Preview:")); EditorGUI.DrawPreviewTexture(new Rect(25, 60, 100, 100), texture); EditorGUI.PrefixLabel(new Rect(150, 45, 100, 15), 0, new GUIContent("Alpha:")); EditorGUI.DrawTextureAlpha(new Rect(150, 60, 100, 100), texture); EditorGUI.PrefixLabel(new Rect(275, 45, 100, 15), 0, new GUIContent("Inverted:")); if (showInverted) EditorGUI.DrawPreviewTexture(new Rect(275, 60, 100, 100), invertedTexture); if (GUI.Button(new Rect(3, position.height - 25, position.width - 6, 20), "Clear texture")) { texture = EditorGUIUtility.whiteTexture; showInverted = false; } } else { EditorGUI.PrefixLabel( new Rect(3, position.height - 25, position.width - 6, 20), 0, new GUIContent("No texture found")); } }

void InvertColors() { for (int m = 0; m < invertedTexture.mipmapCount; m++) { Color[] c = invertedTexture.GetPixels(m); for (int i = 0; i < c.Length; i++) { c[i].r = 1 - c[i].r; c[i].g = 1 - c[i].g; c[i].b = 1 - c[i].b; } invertedTexture.SetPixels(c, m); } invertedTexture.Apply(); } }