private void mainProgressLoop(ProgressBar progress, Texture2D[] packedTextures, AtlasUvs channelMapping)
{
progress.Begin(5, "", "", () => {
foreach (var channel in MeshUtil.allUvChannels)
{
progress.Begin(1, "", channel + ": ", () => {
doPerChannelPack(progress, channel, packedTextures, channelMapping);
});
}
finalizeTextures(progress, packedTextures);
});
}
private void doPerChannelPack(ProgressBar progress, UVChannelFlags channel, Texture2D[] packedTextures, AtlasUvs channelMapping)
{
var mainTextureFeature = _features.Query().FirstOrDefault(f => f.channel == channel);
if (mainTextureFeature == null)
{
return;
}
Texture2D defaultTexture, packedTexture;
Texture2D[] rawTextureArray, processedTextureArray;
progress.Step("Prepare " + channel);
prepareForPacking(mainTextureFeature, out defaultTexture,
out packedTexture,
out rawTextureArray,
out processedTextureArray);
progress.Step("Pack " + channel);
var packedRects = packedTexture.PackTextures(processedTextureArray,
_padding,
_maxAtlasSize,
makeNoLongerReadable: false);
packedTexture.Apply(updateMipmaps: true, makeNoLongerReadable: true);
packedTextures[_features.IndexOf(mainTextureFeature)] = packedTexture;
packSecondaryTextures(progress, channel, mainTextureFeature, packedTexture, packedRects, packedTextures);
//Correct uvs to account for the added border
for (int i = 0; i < packedRects.Length; i++)
{
float dx = 1.0f / packedTexture.width;
float dy = 1.0f / packedTexture.height;
Rect r = packedRects[i];
if (processedTextureArray[i] != defaultTexture)
{
dx *= _border;
dy *= _border;
}
r.x += dx;
r.y += dy;
r.width -= dx * 2;
r.height -= dy * 2;
packedRects[i] = r;
}
for (int i = 0; i < rawTextureArray.Length; i++)
{
channelMapping.SetRect(channel.Index(), rawTextureArray[i], packedRects[i]);
}
}
/// <summary>
/// Actually perform the build for the atlas. This method outputs the atlas textures, and the atlas
/// uvs that map textures into the atlas. This method takes in a progress bar so that the atlas
/// process can be tracked visually, since it can take quite a bit of time when there are a lot of
/// textures to pack.
/// </summary>
public void RebuildAtlas(ProgressBar progress, out Texture2D[] packedTextures, out AtlasUvs channelMapping)
{
if (!Utils.IsCompressible(_format))
{
Debug.LogWarning("Format " + _format + " is not compressible! Using ARGB32 instead.");
_format = TextureFormat.ARGB32;
}
_atlasHash = _currHash;
packedTextures = new Texture2D[_features.Count];
channelMapping = new AtlasUvs();
mainProgressLoop(progress, packedTextures, channelMapping);
//Clear cache
foreach (var texture in _cachedProcessedTextures.Values)
{
UnityEngine.Object.DestroyImmediate(texture);
}
_cachedProcessedTextures.Clear();
foreach (var texture in _cachedDefaultTextures.Values)
{
UnityEngine.Object.DestroyImmediate(texture);
}
_cachedDefaultTextures.Clear();
}