EditorGUI.DrawPreviewTexture

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。
colorWriteMask	Specifies 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();
    }
}

Scripting API

EditorGUI.DrawPreviewTexture

Parameters

Description