EditorGUI.DrawPreviewTexture

Parameters

Description

Draws the texture within a rectangle.

If mat is null (the default), an appropriate material will be chosen for a RGBM or doubleLDR lightmap or a normal map and the fallback blit material will be chosen otherwise.


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();
    }
}