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Added the ability to add additional regions to a RuntimeTexturePacker after packing

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Ell 2022-10-20 23:59:42 +02:00
parent 627350ca31
commit 17ce7b668d
3 changed files with 58 additions and 35 deletions
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1
CHANGELOG.md
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@ -58,6 +58,7 @@ Fixes
### MLEM.Data
Additions
- Added data, from, and copy instructions to DataTextureAtlas
- Added the ability to add additional regions to a RuntimeTexturePacker after packing
Improvements
- Allow data texture atlas pivots and offsets to be negative

69
MLEM.Data/RuntimeTexturePacker.cs
View file

@ -35,8 +35,8 @@ namespace MLEM.Data {
public TimeSpan LastTotalTime => this.LastCalculationTime + this.LastPackTime;
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 List<Request> packedTextures = new List<Request>();
private readonly Dictionary<Point, Point> firstPossiblePosForSize = new Dictionary<Point, Point>();
private readonly Dictionary<Texture2D, TextureData> dataCache = new Dictionary<Texture2D, TextureData>();
private readonly bool autoIncreaseMaxWidth;
private readonly bool forcePowerOfTwo;
@ -71,7 +71,7 @@ namespace MLEM.Data {
/// <param name="padding">The padding that the texture should have around itself. This can be useful if texture bleeding issues occur due to texture coordinate rounding.</param>
/// <param name="padWithPixels">Whether the texture's padding should be filled with a copy of the texture's border, rather than transparent pixels. This value only has an effect if <paramref name="padding"/> is greater than 0.</param>
/// <param name="ignoreTransparent">Whether completely transparent texture regions in the <paramref name="atlas"/> should be ignored. If this is true, they will not be part of the <paramref name="result"/> collection either.</param>
/// <exception cref="InvalidOperationException">Thrown when trying to add data to a packer that has already been packed, or when trying to add a texture width a width greater than the defined max width.</exception>
/// <exception cref="InvalidOperationException">Thrown when trying to add a texture width a width greater than the defined max width.</exception>
public void Add(UniformTextureAtlas atlas, Action<Dictionary<Point, TextureRegion>> result, int padding = 0, bool padWithPixels = false, bool ignoreTransparent = false) {
var addedRegions = new List<TextureRegion>();
var resultRegions = new Dictionary<Point, TextureRegion>();
@ -104,7 +104,7 @@ namespace MLEM.Data {
/// <param name="result">The result callback which will receive the resulting texture regions.</param>
/// <param name="padding">The padding that the texture should have around itself. This can be useful if texture bleeding issues occur due to texture coordinate rounding.</param>
/// <param name="padWithPixels">Whether the texture's padding should be filled with a copy of the texture's border, rather than transparent pixels. This value only has an effect if <paramref name="padding"/> is greater than 0.</param>
/// <exception cref="InvalidOperationException">Thrown when trying to add data to a packer that has already been packed, or when trying to add a texture width a width greater than the defined max width.</exception>
/// <exception cref="InvalidOperationException">Thrown when trying to add a texture width a width greater than the defined max width.</exception>
public void Add(DataTextureAtlas atlas, Action<Dictionary<string, TextureRegion>> result, int padding = 0, bool padWithPixels = false) {
var atlasRegions = atlas.RegionNames.ToArray();
var resultRegions = new Dictionary<string, TextureRegion>();
@ -125,7 +125,7 @@ namespace MLEM.Data {
/// <param name="result">The result callback which will receive the resulting texture region.</param>
/// <param name="padding">The padding that the texture should have around itself. This can be useful if texture bleeding issues occur due to texture coordinate rounding.</param>
/// <param name="padWithPixels">Whether the texture's padding should be filled with a copy of the texture's border, rather than transparent pixels. This value only has an effect if <paramref name="padding"/> is greater than 0.</param>
/// <exception cref="InvalidOperationException">Thrown when trying to add data to a packer that has already been packed, or when trying to add a texture width a width greater than the defined max width.</exception>
/// <exception cref="InvalidOperationException">Thrown when trying to add a texture width a width greater than the defined max width.</exception>
public void Add(Texture2D texture, Action<TextureRegion> result, int padding = 0, bool padWithPixels = false) {
this.Add(new TextureRegion(texture), result, padding, padWithPixels);
}
@ -138,10 +138,8 @@ namespace MLEM.Data {
/// <param name="result">The result callback which will receive the resulting texture region.</param>
/// <param name="padding">The padding that the texture should have around itself. This can be useful if texture bleeding issues occur due to texture coordinate rounding.</param>
/// <param name="padWithPixels">Whether the texture's padding should be filled with a copy of the texture's border, rather than transparent pixels. This value only has an effect if <paramref name="padding"/> is greater than 0.</param>
/// <exception cref="InvalidOperationException">Thrown when trying to add data to a packer that has already been packed, or when trying to add a texture width a width greater than the defined max width.</exception>
/// <exception cref="InvalidOperationException">Thrown when trying to add a texture width a width greater than the defined max width.</exception>
public void Add(TextureRegion texture, Action<TextureRegion> result, int padding = 0, bool padWithPixels = false) {
if (this.PackedTexture != null)
throw new InvalidOperationException("Cannot add texture to a texture packer that is already packed");
var paddedWidth = texture.Width + 2 * padding;
if (paddedWidth > this.maxWidth) {
if (this.autoIncreaseMaxWidth) {
@ -154,50 +152,54 @@ namespace MLEM.Data {
}
/// <summary>
/// Packs all of the textures and texture regions added using <see cref="Add(Microsoft.Xna.Framework.Graphics.Texture2D,System.Action{MLEM.Textures.TextureRegion},int,bool)"/> into one texture.
/// The resulting texture will be stored in <see cref="PackedTexture"/>.
/// Packs all of the textures and texture regions added using <see cref="Add(Microsoft.Xna.Framework.Graphics.Texture2D,System.Action{MLEM.Textures.TextureRegion},int,bool)"/> into one texture, which can be retrieved using <see cref="PackedTexture"/>.
/// All of the result callbacks that were added will also be invoked.
/// This method can be called multiple times if regions are added after <see cref="Pack"/> has already been called. When doing so, result callbacks of previous regions may be invoked again if the resulting <see cref="PackedTexture"/> has to be resized to accommodate newly added regions.
/// </summary>
/// <param name="device">The graphics device to use for texture generation</param>
/// <exception cref="InvalidOperationException">Thrown when calling this method on a texture packer that has already been packed</exception>
public void Pack(GraphicsDevice device) {
if (this.PackedTexture != null)
throw new InvalidOperationException("Cannot pack a texture packer that is already packed");
// set pack areas for each request
// we pack larger textures first, so that smaller textures can fit in the gaps that larger ones leave
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[new Point(request.PackedArea.Width, request.PackedArea.Height)] = request.PackedArea.Location;
this.alreadyPackedTextures.Add(request);
this.firstPossiblePosForSize[new Point(request.PackedArea.Width, request.PackedArea.Height)] = request.PackedArea.Location;
this.packedTextures.Add(request);
}
stopwatch.Stop();
this.LastCalculationTime = stopwatch.Elapsed;
// figure out texture size and generate texture
var width = this.alreadyPackedTextures.Max(t => t.PackedArea.Right);
var height = this.alreadyPackedTextures.Max(t => t.PackedArea.Bottom);
// figure out texture size and regenerate texture if necessary
var width = this.packedTextures.Max(t => t.PackedArea.Right);
var height = this.packedTextures.Max(t => t.PackedArea.Bottom);
if (this.forcePowerOfTwo) {
width = RuntimeTexturePacker.ToPowerOfTwo(width);
height = RuntimeTexturePacker.ToPowerOfTwo(height);
}
if (this.forceSquare)
width = height = Math.Max(width, height);
this.PackedTexture = new Texture2D(device, width, height);
// if we don't need to regenerate, we only need to add newly added regions
IEnumerable<Request> texturesToCopy = this.texturesToPack;
if (this.PackedTexture == null || this.PackedTexture.Width != width || this.PackedTexture.Height != height) {
this.PackedTexture?.Dispose();
this.PackedTexture = new Texture2D(device, width, height);
// if we need to regenerate, we need to copy all regions since the old ones were deleted
texturesToCopy = this.packedTextures;
}
// copy texture data onto the packed texture
stopwatch.Restart();
using (var data = this.PackedTexture.GetTextureData()) {
foreach (var request in this.alreadyPackedTextures)
foreach (var request in texturesToCopy)
this.CopyRegion(data, request);
}
stopwatch.Stop();
this.LastPackTime = stopwatch.Elapsed;
// invoke callbacks
foreach (var request in this.alreadyPackedTextures) {
// invoke callbacks for textures we copied
foreach (var request in texturesToCopy) {
var packedArea = request.PackedArea.Shrink(new Point(request.Padding, request.Padding));
request.Result.Invoke(new TextureRegion(this.PackedTexture, packedArea) {
Pivot = request.Texture.Pivot,
@ -207,18 +209,22 @@ namespace MLEM.Data {
request.Texture.Texture.Dispose();
}
this.ClearTempCollections();
this.texturesToPack.Clear();
this.dataCache.Clear();
}
/// <summary>
/// Resets this texture packer, disposing its <see cref="PackedTexture"/> and readying it to be re-used
/// Resets this texture packer entirely, disposing its <see cref="PackedTexture"/>, clearing all previously added requests, and readying it to be re-used.
/// </summary>
public void Reset() {
this.PackedTexture?.Dispose();
this.PackedTexture = null;
this.LastCalculationTime = TimeSpan.Zero;
this.LastPackTime = TimeSpan.Zero;
this.ClearTempCollections();
this.texturesToPack.Clear();
this.packedTextures.Clear();
this.firstPossiblePosForSize.Clear();
this.dataCache.Clear();
}
/// <summary>Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.</summary>
@ -231,12 +237,12 @@ namespace MLEM.Data {
size.X += request.Padding * 2;
size.Y += request.Padding * 2;
var pos = this.firstPossiblePosForSizeCache.TryGetValue(size, out var first) ? first : Point.Zero;
var pos = this.firstPossiblePosForSize.TryGetValue(size, out var first) ? first : Point.Zero;
var lowestY = int.MaxValue;
while (true) {
var intersected = false;
var area = new Rectangle(pos.X, pos.Y, size.X, size.Y);
foreach (var tex in this.alreadyPackedTextures) {
foreach (var tex in this.packedTextures) {
if (tex.PackedArea.Intersects(area)) {
pos.X = tex.PackedArea.Right;
// when we move down, we want to move down by the smallest intersecting texture's height
@ -296,13 +302,6 @@ 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)

23
Tests/TexturePackerTests.cs
View file

@ -80,6 +80,29 @@ namespace Tests {
Assert.AreEqual(170, packer4.PackedTexture.Height);
}
[Test]
public void TestPackMultipleTimes() {
using var packer = new RuntimeTexturePacker(1024);
// pack the first time
var results = 0;
for (var i = 0; i < 10; i++)
packer.Add(new TextureRegion(this.testTexture, 0, 0, 64, 64), _ => results++);
packer.Pack(this.game.GraphicsDevice);
Assert.AreEqual(10, results);
// pack without resizing
packer.Add(new TextureRegion(this.testTexture, 0, 0, 0, 0), _ => results++);
packer.Pack(this.game.GraphicsDevice);
Assert.AreEqual(11, results);
// pack and force a resize
packer.Add(new TextureRegion(this.testTexture, 0, 0, 64, 64), _ => results++);
packer.Pack(this.game.GraphicsDevice);
// all callbacks are called again, so we add 11 again, as well as the callback we just added
Assert.AreEqual(2 * 11 + 1, results);
}
private static void StubResult(TextureRegion region) {}
}