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further improve runtime texture packer performance by caching the first possible position for a request of a given size

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Ell 2022-05-28 21:21:25 +02:00
parent 61770d59b1
commit 16053d9d04
3 changed files with 17 additions and 9 deletions
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2
CHANGELOG.md
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@ -58,7 +58,7 @@ Improvements
- Premultiply textures when using RawContentManager
- Allow enumerating all region names of a DataTextureAtlas
- Cache RuntimeTexturePacker texture data while packing to improve performance
- Improve RuntimeTexturePacker performance by checking against packed textures in the same order as packing
- Greatly improved RuntimeTexturePacker performance
Fixes
- Fixed SoundEffectReader incorrectly claiming it could read ogg and mp3 files

20
MLEM.Data/RuntimeTexturePacker.cs
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@ -36,6 +36,7 @@ namespace MLEM.Data {
private readonly List<Request> texturesToPack = new List<Request>();
private readonly List<Request> alreadyPackedTextures = new List<Request>();
private readonly Dictionary<Point, Point> firstPossiblePosForSizeCache = new Dictionary<Point, Point>();
private readonly Dictionary<Texture2D, TextureData> dataCache = new Dictionary<Texture2D, TextureData>();
private readonly bool autoIncreaseMaxWidth;
private readonly bool forcePowerOfTwo;
@ -168,6 +169,8 @@ namespace MLEM.Data {
var stopwatch = Stopwatch.StartNew();
foreach (var request in this.texturesToPack.OrderByDescending(t => t.Texture.Width * t.Texture.Height)) {
request.PackedArea = this.FindFreeArea(request);
// if this is the first position that this request fit in, no other requests of the same size will find a position before it
this.firstPossiblePosForSizeCache[request.PackedArea.Size] = request.PackedArea.Location;
this.alreadyPackedTextures.Add(request);
}
stopwatch.Stop();
@ -201,9 +204,7 @@ namespace MLEM.Data {
request.Texture.Texture.Dispose();
}
this.texturesToPack.Clear();
this.alreadyPackedTextures.Clear();
this.dataCache.Clear();
this.ClearTempCollections();
}
/// <summary>
@ -212,11 +213,9 @@ namespace MLEM.Data {
public void Reset() {
this.PackedTexture?.Dispose();
this.PackedTexture = null;
this.texturesToPack.Clear();
this.alreadyPackedTextures.Clear();
this.dataCache.Clear();
this.LastCalculationTime = TimeSpan.Zero;
this.LastPackTime = TimeSpan.Zero;
this.ClearTempCollections();
}
/// <summary>Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.</summary>
@ -229,7 +228,7 @@ namespace MLEM.Data {
size.X += request.Padding * 2;
size.Y += request.Padding * 2;
var pos = new Point(0, 0);
var pos = this.firstPossiblePosForSizeCache.TryGetValue(size, out var first) ? first : Point.Zero;
var lowestY = int.MaxValue;
while (true) {
var intersected = false;
@ -294,6 +293,13 @@ namespace MLEM.Data {
return true;
}
private void ClearTempCollections() {
this.texturesToPack.Clear();
this.alreadyPackedTextures.Clear();
this.firstPossiblePosForSizeCache.Clear();
this.dataCache.Clear();
}
private static int ToPowerOfTwo(int value) {
var ret = 1;
while (ret < value)

4
Sandbox/GameImpl.cs
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@ -329,7 +329,9 @@ namespace Sandbox {
Console.WriteLine($"Returned {r.Count} regions: {string.Join(", ", r.Select(kv => kv.Key + ": " + kv.Value.Area))}");
}, 1, true);
packer.Pack(this.GraphicsDevice);
packer.PackedTexture.SaveAsPng(File.Create("_Packed.png"), packer.PackedTexture.Width, packer.PackedTexture.Height);
using (var stream = File.Create("_Packed.png"))
packer.PackedTexture.SaveAsPng(stream, packer.PackedTexture.Width, packer.PackedTexture.Height);
this.OnDraw += (g, t) => {
this.SpriteBatch.Begin(samplerState: SamplerState.PointClamp);