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- Improved DataTextureAtlas parsing

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- Added data and copy instructions to DataTextureAtlas
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Ell 2022-09-14 10:40:52 +02:00
parent 38214a66a3
commit 914b0d9c2d
4 changed files with 125 additions and 40 deletions
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3
CHANGELOG.md
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@ -45,6 +45,9 @@ Fixes
- Fixed Element.OnChildAdded and Element.OnChildRemoved being called for grandchildren when a child is added
### MLEM.Data
Additions
- Added data and copy instructions to DataTextureAtlas
Improvements
- Allow data texture atlas pivots and offsets to be negative
- Made RuntimeTexturePacker restore texture region name and pivot when packing

132
MLEM.Data/DataTextureAtlas.cs
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@ -1,3 +1,4 @@
using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
@ -5,6 +6,8 @@ using System.Text.RegularExpressions;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.Graphics;
using MLEM.Extensions;
using MLEM.Misc;
using MLEM.Textures;
#if FNA
using MLEM.Extensions;
@ -18,15 +21,19 @@ namespace MLEM.Data {
/// </para>
/// <para>
/// Data texture atlases are designed to be easy to write by hand. Because of this, their structure is very simple.
/// Each texture region defined in the atlas consists of its name, followed by a set of possible keywords and their arguments, separated by spaces.
/// The <c>loc</c> keyword defines the <see cref="TextureRegion.Area"/> of the texture region as a rectangle whose origin is its top-left corner. It requires four arguments: x, y, width and height of the rectangle.
/// The (optional) <c>piv</c> keyword defines the <see cref="TextureRegion.PivotPixels"/> of the texture region. It requires two arguments: x and y. If it is not supplied, the pivot defaults to the top-left corner of the texture region.
/// The (optional) <c>off</c> keyword defines an offset that is added onto the location and pivot of this texture region. This is useful when copying and pasting a previously defined texture region to create a second region that has a constant offset. It requires two arguments: The x and y offset.
/// Each texture region defined in the atlas consists of its names (where multiple names can be separated by whitespace), followed by a set of possible instructions and their arguments, also separated by whitespace.
/// <list type="bullet">
/// <item><description>The <c>loc</c> (or <c>location</c>) instruction defines the <see cref="TextureRegion.Area"/> of the texture region as a rectangle whose origin is its top-left corner. It requires four arguments: x, y, width and height of the rectangle.</description></item>
/// <item><description>The (optional) <c>piv</c> (or <c>pivot</c>) instruction defines the <see cref="TextureRegion.PivotPixels"/> of the texture region. It requires two arguments: x and y. If it is not supplied, the pivot defaults to the top-left corner of the texture region.</description></item>
/// <item><description>The (optional) <c>off</c> (of <c>offset</c>) instruction defines an offset that is added onto the location and pivot of this texture region. This is useful when duplicating a previously defined texture region to create a second region that has a constant offset. It requires two arguments: The x and y offset.</description></item>
/// <item><description>The (optional and repeatable) <c>cpy</c> (or <c>copy</c>) instruction defines an additional texture region that should also be generated from the same data, but with a given offset that will be applied to the location and pivot. It requires three arguments: the copy region's name and the x and y offsets.</description></item>
/// <item><description>The (optional and repeatable) <c>dat</c> (or <c>data</c>) instruction defines a custom data point that can be added to the resulting <see cref="TextureRegion"/>'s <see cref="GenericDataHolder"/> data. It requires two arguments: the data point's name and the data point's value, the latter of which is also stored as a string value.</description></item>
/// </list>
/// </para>
/// <example>
/// The following entry defines a texture region with the name <c>LongTableRight</c>, whose <see cref="TextureRegion.Area"/> will be a rectangle with X=32, Y=30, Width=64, Height=48, and whose <see cref="TextureRegion.PivotPixels"/> will be a vector with X=80, Y=46.
/// The following entry defines a texture region with the names <c>LongTableRight</c> and <c>LongTableUp</c>, whose <see cref="TextureRegion.Area"/> will be a rectangle with X=32, Y=30, Width=64, Height=48, and whose <see cref="TextureRegion.PivotPixels"/> will be a vector with X=80, Y=46.
/// <code>
/// LongTableRight
/// LongTableRight LongTableUp
/// loc 32 30 64 48
/// piv 80 46
/// </code>
@ -69,6 +76,7 @@ namespace MLEM.Data {
/// <summary>
/// Loads a <see cref="DataTextureAtlas"/> from the given loaded texture and texture data file.
/// For more information on data texture atlases, see the <see cref="DataTextureAtlas"/> type documentation.
/// </summary>
/// <param name="texture">The texture to use for this data texture atlas</param>
/// <param name="content">The content manager to use for loading</param>
@ -78,41 +86,92 @@ namespace MLEM.Data {
public static DataTextureAtlas LoadAtlasData(TextureRegion texture, ContentManager content, string infoPath, bool pivotRelative = false) {
var info = Path.Combine(content.RootDirectory, infoPath);
string text;
if (Path.IsPathRooted(info)) {
text = File.ReadAllText(info);
} else {
using (var reader = new StreamReader(TitleContainer.OpenStream(info)))
text = reader.ReadToEnd();
try {
if (Path.IsPathRooted(info)) {
text = File.ReadAllText(info);
} else {
using (var reader = new StreamReader(TitleContainer.OpenStream(info)))
text = reader.ReadToEnd();
}
} catch (Exception e) {
throw new ContentLoadException($"Couldn't load data texture atlas data from {info}", e);
}
var atlas = new DataTextureAtlas(texture);
var words = Regex.Split(text, @"\s+");
// parse each texture region: "<names> loc <u> <v> <w> <h> [piv <px> <py>] [off <ox> <oy>]"
foreach (Match match in Regex.Matches(text, @"(.+)\s+loc\s+([0-9+]+)\s+([0-9+]+)\s+([0-9+]+)\s+([0-9+]+)\s*(?:piv\s+([0-9.+-]+)\s+([0-9.+-]+))?\s*(?:off\s+([0-9.+-]+)\s+([0-9.+-]+))?")) {
// offset
var off = !match.Groups[8].Success ? Vector2.Zero : new Vector2(
float.Parse(match.Groups[8].Value, CultureInfo.InvariantCulture),
float.Parse(match.Groups[9].Value, CultureInfo.InvariantCulture));
var namesOffsets = new List<(string, Vector2)>();
var customData = new Dictionary<string, string>();
var location = Rectangle.Empty;
var pivot = Vector2.Zero;
var offset = Vector2.Zero;
for (var i = 0; i < words.Length; i++) {
var word = words[i];
try {
switch (word) {
case "loc":
case "location":
location = new Rectangle(
int.Parse(words[i + 1], CultureInfo.InvariantCulture), int.Parse(words[i + 2], CultureInfo.InvariantCulture),
int.Parse(words[i + 3], CultureInfo.InvariantCulture), int.Parse(words[i + 4], CultureInfo.InvariantCulture));
i += 4;
break;
case "piv":
case "pivot":
pivot = new Vector2(
float.Parse(words[i + 1], CultureInfo.InvariantCulture),
float.Parse(words[i + 2], CultureInfo.InvariantCulture));
i += 2;
break;
case "off":
case "offset":
offset = new Vector2(
float.Parse(words[i + 1], CultureInfo.InvariantCulture),
float.Parse(words[i + 2], CultureInfo.InvariantCulture));
i += 2;
break;
case "cpy":
case "copy":
var copyOffset = new Vector2(
float.Parse(words[i + 2], CultureInfo.InvariantCulture),
float.Parse(words[i + 3], CultureInfo.InvariantCulture));
namesOffsets.Add((words[i + 1], copyOffset));
i += 3;
break;
case "dat":
case "data":
customData.Add(words[i + 1], words[i + 2]);
i += 2;
break;
default:
// if we have a location for the previous regions, they're valid so we add them
if (location != Rectangle.Empty && namesOffsets.Count > 0) {
location.Offset(offset.ToPoint());
pivot += offset;
if (!pivotRelative)
pivot -= location.Location.ToVector2();
// location
var loc = new Rectangle(
int.Parse(match.Groups[2].Value), int.Parse(match.Groups[3].Value),
int.Parse(match.Groups[4].Value), int.Parse(match.Groups[5].Value));
loc.Offset(off.ToPoint());
foreach (var (name, off) in namesOffsets) {
var region = new TextureRegion(texture, location.OffsetCopy(off.ToPoint())) {
PivotPixels = pivot + off,
Name = name
};
foreach (var kv in customData)
region.SetData(kv.Key, kv.Value);
atlas.regions.Add(name, region);
}
namesOffsets.Clear();
}
// pivot
var piv = !match.Groups[6].Success ? Vector2.Zero : off + new Vector2(
float.Parse(match.Groups[6].Value, CultureInfo.InvariantCulture) - (pivotRelative ? 0 : loc.X),
float.Parse(match.Groups[7].Value, CultureInfo.InvariantCulture) - (pivotRelative ? 0 : loc.Y));
foreach (var name in Regex.Split(match.Groups[1].Value, @"\s")) {
var trimmed = name.Trim();
if (trimmed.Length <= 0)
continue;
var region = new TextureRegion(texture, loc) {
PivotPixels = piv,
Name = trimmed
};
atlas.regions.Add(trimmed, region);
// we're starting a new region (or adding another name for a new region), so clear old data
namesOffsets.Add((word.Trim(), Vector2.Zero));
customData.Clear();
location = Rectangle.Empty;
pivot = Vector2.Zero;
offset = Vector2.Zero;
break;
}
} catch (Exception e) {
throw new ContentLoadException($"Couldn't parse data texture atlas instruction {word} for region(s) {string.Join(", ", namesOffsets)}", e);
}
}
@ -128,6 +187,7 @@ namespace MLEM.Data {
/// <summary>
/// Loads a <see cref="DataTextureAtlas"/> from the given texture and texture data file.
/// For more information on data texture atlases, see the <see cref="DataTextureAtlas"/> type documentation.
/// </summary>
/// <param name="content">The content manager to use for loading</param>
/// <param name="texturePath">The path to the texture file</param>

14
Tests/Content/Texture.atlas
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@ -13,11 +13,19 @@ TestRegionNegativePivot
loc 0 32 +16 16
piv -32 +46
DataTest
loc 0 0 16 16
dat DataPoint1 ThisIsSomeData
dat DataPoint2 3.5
dat DataPoint3 ---
LongTableUp
loc 0 32 64 48
piv 16 48
loc 0 32 64 48
copy Copy1 16 0
cpy Copy2 32 4
LongTableRight LongTableDown LongTableLeft
loc 32 30 64 48
location 32 30 64 48
piv 80 46
off 32 2
offset 32 2

16
Tests/DataTextureAtlasTests.cs
View file

@ -13,7 +13,7 @@ namespace Tests {
using var game = TestGame.Create();
using var texture = new Texture2D(game.GraphicsDevice, 1, 1);
var atlas = DataTextureAtlas.LoadAtlasData(new TextureRegion(texture), game.RawContent, "Texture.atlas");
Assert.AreEqual(atlas.Regions.Count(), 8);
Assert.AreEqual(11, atlas.Regions.Count());
// no added offset
var table = atlas["LongTableUp"];
@ -29,6 +29,20 @@ namespace Tests {
var negativePivot = atlas["TestRegionNegativePivot"];
Assert.AreEqual(negativePivot.Area, new Rectangle(0, 32, 16, 16));
Assert.AreEqual(negativePivot.PivotPixels, new Vector2(-32, 46 - 32));
// copies
var copy1 = atlas["Copy1"];
Assert.AreEqual(copy1.Area, new Rectangle(0 + 16, 32, 64, 48));
Assert.AreEqual(copy1.PivotPixels, new Vector2(16 + 16, 48 - 32));
var copy2 = atlas["Copy2"];
Assert.AreEqual(copy2.Area, new Rectangle(0 + 32, 32 + 4, 64, 48));
Assert.AreEqual(copy2.PivotPixels, new Vector2(16 + 32, 48 - 32 + 4));
// data
var data = atlas["DataTest"];
Assert.AreEqual("ThisIsSomeData", data.GetData<string>("DataPoint1"));
Assert.AreEqual("3.5", data.GetData<string>("DataPoint2"));
Assert.AreEqual("---", data.GetData<string>("DataPoint3"));
}
}