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Feature: Custom texture size #23

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Feature: Custom texture size #23

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3e21293
Added support for using a custom texture size
Pituivan Apr 26, 2025
901312d
Added a button to automatically set texture size to the size of the t…
Pituivan Apr 26, 2025
6a73358
Made it so the default custom texture size is the size of the first i…
Pituivan Apr 26, 2025
aa37830
Solved a NullReferenceException thrown when the texture of the first …
Pituivan Apr 26, 2025
c170e7b
Fixed last known bug, where the size of the first input texture would…
Pituivan Apr 26, 2025
91f415c
Just fixed a typo
Pituivan Apr 26, 2025
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64 changes: 54 additions & 10 deletions Editor/TexturePackerWindow.cs
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
using System.Collections.Generic;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using UnityEditor;
Expand Down Expand Up @@ -26,6 +26,9 @@ public class TexturePackerWindow : EditorWindow
private List<TextureItem> _items = new List<TextureItem>();
private TexturePreview _preview;

private bool _useCustomTexSize = false;
private bool _overrideDefaultTexSize = true;

[MenuItem("Window/Channel Packer")]
static void Open()
{
Expand All @@ -38,7 +41,7 @@ public void Initialize()
minSize = _windowSize;
titleContent = new GUIContent(_windowTitle);

for(int i = _textureSupportedResolutionMin; i <= _textureSupportedResolutionMax; i *= 2)
for (int i = _textureSupportedResolutionMin; i <= _textureSupportedResolutionMax; i *= 2)
{
_textureResolutions.Add(i);
_textureResolutionsNames.Add(i.ToString());
Expand All @@ -53,14 +56,19 @@ private void RefreshItems()
if (_items.Count == 0)
return;

var toDeleteItems = _items.Where(x => x.toDelete==true).ToList();
var toDeleteItems = _items.Where(x => x.toDelete == true).ToList();
foreach (var item in toDeleteItems)
{
_texturePacker.Remove(item.input);
_items.Remove(item);
}
}

private void SetTexSizeFromInput(TextureInput input)
{
_texturePacker.texSize = input.texture == null ? Vector2Int.zero : new Vector2Int(input.texture.width, input.texture.height);
}

private void OnGUI()
{
_windowScrollPos = EditorGUILayout.BeginScrollView(_windowScrollPos, false, false);
Expand Down Expand Up @@ -93,26 +101,62 @@ private void OnGUI()
GUILayout.FlexibleSpace();
EditorGUILayout.EndHorizontal();

int prevRes = _texturePacker.resolution;
Vector2Int prevTexSize = _texturePacker.texSize;
_texturePacker.resolution = 128;

_preview.Draw(_texturePacker);

_texturePacker.resolution = prevRes;
_texturePacker.texSize = prevTexSize;

GUILayout.Label("Options", TexturePackerStyles.Heading);
GUILayout.BeginVertical(TexturePackerStyles.Section);
_textureFormat = (TextureFormat)EditorGUILayout.EnumPopup("> Format:", _textureFormat);
_texturePacker.resolution = EditorGUILayout.IntPopup("> Resolution:", _texturePacker.resolution, _textureResolutionsNames.ToArray(), _textureResolutions.ToArray());

_useCustomTexSize = EditorGUILayout.Toggle("> Custom texture size:", _useCustomTexSize);

if (_useCustomTexSize)
{
if (_overrideDefaultTexSize && _texturePacker.texInputs.Count == 1)
{
SetTexSizeFromInput(_texturePacker.texInputs[0]);
}
_overrideDefaultTexSize = false;

_texturePacker.texSize.x = Mathf.Abs(EditorGUILayout.IntField("> Texture width:", _texturePacker.texSize.x));
_texturePacker.texSize.y = Mathf.Abs(EditorGUILayout.IntField("> Texture height:", _texturePacker.texSize.y));

if (_texturePacker.texInputs.Count > 0)
{
EditorGUILayout.Separator();
if (GUILayout.Button("Use size from input"))
{
var menu = new GenericMenu();
for (int i = 0; i < _texturePacker.texInputs.Count; i++)
{
TextureInput input = _texturePacker.texInputs[i];
menu.AddItem(new GUIContent($"Input {i + 1}"), on: false, () => SetTexSizeFromInput(input));
}

var dropdownPos = new Rect(Event.current.mousePosition, size: Vector2.zero);
menu.DropDown(dropdownPos);
}
}
}
else
{
_texturePacker.texSize = Vector2Int.one * EditorGUILayout.IntPopup("> Resolution:", _texturePacker.resolution, _textureResolutionsNames.ToArray(), _textureResolutions.ToArray());
_overrideDefaultTexSize = true;
}

GUILayout.EndVertical();

if (GUILayout.Button("Generate Texture", TexturePackerStyles.Button))
{
string defaultPath = Application.dataPath;
if(_texturePacker.texInputs.Count > 0 && _texturePacker.texInputs[0].texture != null)
if (_texturePacker.texInputs.Count > 0 && _texturePacker.texInputs[0].texture != null)
{
string path = AssetDatabase.GetAssetPath(_texturePacker.texInputs[0].texture);
if(path != null && !string.IsNullOrEmpty(path))
if (path != null && !string.IsNullOrEmpty(path))
{
path = Path.Combine(Application.dataPath, "..", path);
defaultPath = Path.GetDirectoryName(path);
Expand All @@ -123,9 +167,9 @@ private void OnGUI()
{
Texture2D output = _texturePacker.Create();

if(_textureFormat == TextureFormat.JPG)
if (_textureFormat == TextureFormat.JPG)
File.WriteAllBytes(savePath, output.EncodeToJPG());
else if(_textureFormat == TextureFormat.PNG)
else if (_textureFormat == TextureFormat.PNG)
File.WriteAllBytes(savePath, output.EncodeToPNG());
else
File.WriteAllBytes(savePath, output.EncodeToEXR());
Expand Down
13 changes: 1 addition & 12 deletions Editor/TexturePackerWindow.cs.meta
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14 changes: 12 additions & 2 deletions Runtime/TexturePacker.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -13,7 +13,17 @@ public List<TextureInput> texInputs {
get { return _texInputs; }
}

public int resolution = 2048;
public Vector2Int texSize = new Vector2Int(2048, 2048);

private int _resolution;
public int resolution {
get { return _resolution; }
set
{
_resolution = value;
texSize = Vector2Int.one * value;
}
}

public void Initialize()
{
Expand Down Expand Up @@ -108,7 +118,7 @@ public Texture2D Create()
++idx;
}

var texture = TextureUtility.GenerateTexture(resolution, resolution, _material);
var texture = TextureUtility.GenerateTexture(texSize.x, texSize.y, _material);

return texture;
}
Expand Down