/// <summary>
/// Loads a SpriteAtlas created with the Sprite Atlas Packer tool
/// </summary>
public SpriteAtlas LoadSpriteAtlas(string name, bool premultiplyAlpha = false)
{
if (LoadedAssets.TryGetValue(name, out var asset))
{
if (asset is SpriteAtlas spriteAtlas)
{
return(spriteAtlas);
}
}
var atlasData = SpriteAtlasLoader.ParseSpriteAtlasData($"Content/{name}.atlas");
var atlas = atlasData.AsSpriteAtlas(ReadAsset <Texture2D>(name, null));
LoadedAssets.Add(name, atlas);
DisposableAssets.Add(atlas);
return(atlas);
}
void LoadTextureAndAtlasFiles()
{
if (_texturePtr != IntPtr.Zero)
{
Core.GetGlobalManager <ImGuiManager>().UnbindTexture(_texturePtr);
}
_spriteAtlasData.Clear();
_nonEditableAnimations.Clear();
_atlasAllowsAnimationEditing = true;
_hasSlicedContent = false;
var _atlasTexture = Texture2D.FromStream(Core.GraphicsDevice, File.OpenRead(_sourceImageFile));
_textureSize = new Num.Vector2(_atlasTexture.Width, _atlasTexture.Height);
_textureAspectRatio = _textureSize.X / _textureSize.Y;
_texturePtr = Core.GetGlobalManager <ImGuiManager>().BindTexture(_atlasTexture);
_textureLoadedThisFrame = true;
if (File.Exists(_sourceAtlasFile))
{
_hasSlicedContent = true;
_spriteAtlasData = SpriteAtlasLoader.ParseSpriteAtlasData(_sourceAtlasFile, true);
// ensure animations are contiguous, since that is all we support.
// First check that all frames are in order in the animations
for (var j = 0; j < _spriteAtlasData.AnimationFrames.Count; j++)
{
var animation = _spriteAtlasData.AnimationFrames[j];
for (var i = 0; i < animation.Count; i++)
{
if (i == 0)
{
continue;
}
if (animation[i] != animation[i - 1] + 1)
{
_atlasAllowsAnimationEditing = false;
_nonEditableAnimations.Add(j);
}
}
}
// Next check that all frames are in order, ghetto style. We check that all the y-values of the rects
// always increase or stay the same. Not perfect by any means, but we dont know if this is padded in some
// odd way or contains sprites of odd sizes so this is a quick and dirty solution.
var lastRectY = -1;
for (var i = 0; i < _spriteAtlasData.SourceRects.Count; i++)
{
if (i == 0 || lastRectY <= _spriteAtlasData.SourceRects[i].Y)
{
lastRectY = _spriteAtlasData.SourceRects[i].Y;
continue;
}
_atlasAllowsAnimationEditing = false;
return;
}
}
}