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allow ignoring transparent regions when packing a UniformTextureAtlas

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Ell 2022-05-27 11:16:16 +02:00
parent cb496f613f
commit fdf04a7e77
2 changed files with 28 additions and 5 deletions
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29
MLEM.Data/RuntimeTexturePacker.cs
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@ -68,17 +68,30 @@ 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>
/// <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>
public void Add(UniformTextureAtlas atlas, Action<Dictionary<Point, TextureRegion>> result, int padding = 0, bool padWithPixels = false) {
public void Add(UniformTextureAtlas atlas, Action<Dictionary<Point, TextureRegion>> result, int padding = 0, bool padWithPixels = false, bool ignoreTransparent = false) {
TextureData data = null;
var addedRegions = new List<TextureRegion>();
var resultRegions = new Dictionary<Point, TextureRegion>();
for (var x = 0; x < atlas.RegionAmountX; x++) {
for (var y = 0; y < atlas.RegionAmountY; y++) {
var pos = new Point(x, y);
this.Add(atlas[pos], r => {
var region = atlas[pos];
if (ignoreTransparent) {
if (data == null)
data = atlas.Texture.GetTextureData();
if (IsTransparent(region, data))
continue;
}
this.Add(region, r => {
resultRegions.Add(pos, r);
if (resultRegions.Count >= atlas.RegionAmountX * atlas.RegionAmountY)
if (resultRegions.Count >= addedRegions.Count)
result.Invoke(resultRegions);
}, padding, padWithPixels);
addedRegions.Add(region);
}
}
}
@ -273,6 +286,16 @@ namespace MLEM.Data {
return ret;
}
private static bool IsTransparent(TextureRegion region, TextureData data) {
for (var rX = 0; rX < region.Width; rX++) {
for (var rY = 0; rY < region.Height; rY++) {
if (data[region.U + rX, region.V + rY] != Color.Transparent)
return false;
}
}
return true;
}
private class Request {
public readonly TextureRegion Texture;

4
Sandbox/GameImpl.cs
View file

@ -323,7 +323,7 @@ namespace Sandbox {
packer.Add(new UniformTextureAtlas(tex, 16, 16), r => {
regions.AddRange(r.Values);
Console.WriteLine($"Returned {r.Count} regions: {string.Join(", ", r.Select(kv => kv.Key + ": " + kv.Value.Area))}");
}, 1, true);
}, 1, true, true);
packer.Add(this.Content.LoadTextureAtlas("Textures/Furniture"), r => {
regions.AddRange(r.Values);
Console.WriteLine($"Returned {r.Count} regions: {string.Join(", ", r.Select(kv => kv.Key + ": " + kv.Value.Area))}");
@ -342,7 +342,7 @@ namespace Sandbox {
x += r.Width * sc + 1;
if (x >= 1000) {
x = 0;
y += 50;
y += 250;
}
}
this.SpriteBatch.End();