public override void OnRebuildRequested()
{
// After a Font asset gets re-imported the managed side gets deleted and recreated,
// that means the delegates are not persisted.
// so we need to properly enforce a consistent state here.
FontUpdateTracker.UntrackText(this);
FontUpdateTracker.TrackText(this);
// Also the textgenerator is no longer valid.
cachedTextGenerator.Invalidate();
base.OnRebuildRequested();
}
/// <summary>
/// 文本纹理更新回调
/// </summary>
public void FontTextureChanged()
{
// Only invoke if we are not destroyed.
if (!this)
{
FontUpdateTracker.UntrackText(this);
return;
}
if (m_DisableFontTextureRebuiltCallback)
{
return;
}
//将文本生成器标记为无效。 这将迫使全文生成在下次调用Populate时
cachedTextGenerator.Invalidate();
if (!IsActive())
{
return;
}
// this is a bit hacky, but it is currently the
// cleanest solution....
// if we detect the font texture has changed and are in a rebuild loop
// we just regenerate the verts for the new UV's
//这有点hacky，但它目前是
//最干净的解决方案....
//如果我们检测到字体纹理已更改并且处于重建循环中
//我们只是重新生成新UV的顶点
if (BrandoCanvasUpdateRegistry.IsRebuildingGraphics() || BrandoCanvasUpdateRegistry.IsRebuildingLayout())
{
UpdateGeometry();
}
else
{
SetAllDirty();
}
}
protected override void OnDisable()
{
FontUpdateTracker.UntrackText(this);
base.OnDisable();
}
protected override void OnEnable()
{
base.OnEnable();
cachedTextGenerator.Invalidate();
FontUpdateTracker.TrackText(this);
}