public void Parse(BitmapFont fnt, string fontFile)
{
ParsePages(fnt, fontFile);
}
public void ParsePages(BitmapFont fnt, string fontFile)
{
string[] pages = fnt.pages;
Texture2D[] texturePages = new Texture2D[pages.Length * (fnt.packed?4:1)];
int index = 0;
//用在带通道的字体上，提取通道值后的颜色应该是白色的
Color defaultColor = Color.white;
foreach (string pageImagePath in pages)
{
//Find original font texture
string imagePath = Path.GetDirectoryName(fontFile) + "/" + pageImagePath;
Texture2D inputTexture = (Texture2D)AssetDatabase.LoadAssetAtPath(imagePath, typeof(Texture2D));
//Make sure font texture is readable
TextureImporter inputTextureImp = (TextureImporter)AssetImporter.GetAtPath(imagePath);
inputTextureImp.textureType = TextureImporterType.Default;
inputTextureImp.isReadable = true;
inputTextureImp.maxTextureSize = 4096;
inputTextureImp.mipmapEnabled = false;
inputTextureImp.textureFormat = TextureImporterFormat.RGBA32;
AssetDatabase.ImportAsset(imagePath, ImportAssetOptions.ForceSynchronousImport);
//Create distance field from texture
//处理通道
if (fnt.packed)
{
Texture2D distanceField = DistanceField.CreateDistanceFieldTexture(inputTexture, DistanceField.TextureChannel.BLUE, inputTexture.width, defaultColor);
//byte[] buff = distanceField.EncodeToPNG();
//File.WriteAllBytes(Path.GetDirectoryName(fontFile) + "/index_" + index + ".png", buff);
texturePages[index++] = distanceField;
distanceField = DistanceField.CreateDistanceFieldTexture(inputTexture, DistanceField.TextureChannel.GREEN, inputTexture.width, defaultColor);
//buff = distanceField.EncodeToPNG();
//File.WriteAllBytes(Path.GetDirectoryName(fontFile) + "/index_" + index + ".png", buff);
texturePages[index++] = distanceField;
distanceField = DistanceField.CreateDistanceFieldTexture(inputTexture, DistanceField.TextureChannel.RED, inputTexture.width, defaultColor);
//buff = distanceField.EncodeToPNG();
//File.WriteAllBytes(Path.GetDirectoryName(fontFile) + "/index_" + index + ".png", buff);
texturePages[index++] = distanceField;
distanceField = DistanceField.CreateDistanceFieldTexture(inputTexture, DistanceField.TextureChannel.ALPHA, inputTexture.width, defaultColor);
//buff = distanceField.EncodeToPNG();
//File.WriteAllBytes(Path.GetDirectoryName(fontFile) + "/index_" + index + ".png", buff);
texturePages[index] = distanceField;
}
else
{
Texture2D distanceField = inputTexture; //DistanceField.CreateDistanceFieldTexture(inputTexture, InputTextureChannel, inputTexture.width / DistanceFieldScaleFactor);
texturePages[index] = distanceField;
}
index++;
}
//Create texture atlas
if (texturePages.Length > 1)
{
Texture2D pageAtlas = new Texture2D(0, 0);
fnt.pageOffsets = pageAtlas.PackTextures(texturePages, 0);
//foreach(Rect r in fnt.pageOffsets)
//{
// Debug.Log(r);
//}
//Save atlas as png
byte[] pngData = pageAtlas.EncodeToPNG();
string outputPath = fontFile.Substring(0, fontFile.LastIndexOf('.')) + "_pak.png";
File.WriteAllBytes(outputPath, pngData);
AssetDatabase.ImportAsset(outputPath, ImportAssetOptions.ForceSynchronousImport);
//Set correct texture format
TextureImporter texImp = (TextureImporter)TextureImporter.GetAtPath(outputPath);
texImp.textureType = TextureImporterType.Default;
texImp.isReadable = true;
texImp.textureFormat = TextureImporterFormat.RGBA32;
texImp.mipmapEnabled = false;
AssetDatabase.ImportAsset(outputPath, ImportAssetOptions.ForceSynchronousImport);
//Load the saved texture atlas
fnt.pageAtlas = AssetDatabase.LoadAssetAtPath <Texture2D>(outputPath);
}
else
{
fnt.pageAtlas = texturePages[0];
}
}