/// <summary>
/// Extract sprites from the atlas, adding them to the list.
/// </summary>
static public void ExtractSprites(UIAtlas atlas, List <SpriteEntry> finalSprites)
{
ShowProgress(0f);
TextureAlphaSpliter.UseRgbaTex(atlas);
// Make the atlas texture readable
Texture2D tex = NGUIEditorTools.ImportTexture(atlas.texture, true, true, false);
if (tex != null)
{
Color32[] pixels = null;
int width = tex.width;
int height = tex.height;
List <UISpriteData> sprites = atlas.spriteList;
float count = sprites.Count;
int index = 0;
foreach (UISpriteData es in sprites)
{
ShowProgress((index++) / count);
bool found = false;
foreach (SpriteEntry fs in finalSprites)
{
if (es.name == fs.name)
{
fs.CopyBorderFrom(es);
found = true;
break;
}
}
if (!found)
{
if (pixels == null)
{
pixels = tex.GetPixels32();
}
SpriteEntry sprite = ExtractSprite(es, pixels, width, height);
if (sprite != null)
{
finalSprites.Add(sprite);
}
}
}
}
// The atlas no longer needs to be readable
NGUIEditorTools.ImportTexture(atlas.texture, false, false, !atlas.premultipliedAlpha);
ShowProgress(1f);
}
/// <summary>
/// Combine all sprites into a single texture and save it to disk.
/// </summary>
static public bool UpdateTexture(UIAtlas atlas, List <SpriteEntry> sprites)
{
// Get the texture for the atlas
Texture2D tex = atlas.texture as Texture2D;
bool success = TextureAlphaSpliter.UseRgbaTex(atlas);
if (success)
{
tex = atlas.texture as Texture2D;
}
//bool isRGB = tex != null && tex.name.Contains("(rgb)");
//if (isRGB)
//{
// var srcTex = TextureAlphaSpliter.GetUIRgbaTex(tex);
// if (srcTex != null) {
// tex = srcTex;
// atlas.spriteMaterial.SetTexture("_MainTex", tex);
// }
// else
// {
// Debug.LogErrorFormat("找不到图集={0}的原图(rgba)", atlas.name);
// }
//}
string oldPath = (tex != null) ? AssetDatabase.GetAssetPath(tex.GetInstanceID()) : "";
string newPath = NGUIEditorTools.GetSaveableTexturePath(atlas);
// Clear the read-only flag in texture file attributes
if (System.IO.File.Exists(newPath))
{
#if !UNITY_4_1 && !UNITY_4_0 && !UNITY_3_5
if (!AssetDatabase.IsOpenForEdit(newPath))
{
Debug.LogError(newPath + " is not editable. Did you forget to do a check out?");
return(false);
}
#endif
System.IO.FileAttributes newPathAttrs = System.IO.File.GetAttributes(newPath);
newPathAttrs &= ~System.IO.FileAttributes.ReadOnly;
System.IO.File.SetAttributes(newPath, newPathAttrs);
}
bool newTexture = (tex == null || oldPath != newPath);
if (newTexture)
{
// Create a new texture for the atlas
tex = new Texture2D(1, 1, TextureFormat.ARGB32, false);
}
else
{
// Make the atlas readable so we can save it
tex = NGUIEditorTools.ImportTexture(oldPath, true, false, false);
}
// Pack the sprites into this texture
if (PackTextures(tex, sprites))
{
byte[] bytes = tex.EncodeToPNG();
System.IO.File.WriteAllBytes(newPath, bytes);
bytes = null;
// Load the texture we just saved as a Texture2D
AssetDatabase.SaveAssets();
AssetDatabase.Refresh(ImportAssetOptions.ForceSynchronousImport);
tex = NGUIEditorTools.ImportTexture(newPath, false, true, !atlas.premultipliedAlpha);
// Update the atlas texture
if (newTexture)
{
if (tex == null)
{
Debug.LogError("Failed to load the created atlas saved as " + newPath);
}
else
{
atlas.spriteMaterial.mainTexture = tex;
}
ReleaseSprites(sprites);
AssetDatabase.SaveAssets();
AssetDatabase.Refresh(ImportAssetOptions.ForceSynchronousImport);
}
return(true);
}
else
{
if (!newTexture)
{
NGUIEditorTools.ImportTexture(oldPath, false, true, !atlas.premultipliedAlpha);
}
//Debug.LogError("Operation canceled: The selected sprites can't fit into the atlas.\n" +
// "Keep large sprites outside the atlas (use UITexture), and/or use multiple atlases instead.");
EditorUtility.DisplayDialog("Operation Canceled", "The selected sprites can't fit into the atlas.\n" +
"Keep large sprites outside the atlas (use UITexture), and/or use multiple atlases instead", "OK");
return(false);
}
}