public static Texture LoadBlpTexture(
GraphicsDevice graphicsDevice,
ResourceFactory resourceFactory,
Stream stream,
Veldrid.PixelFormat pixelFormat = Veldrid.PixelFormat.B8_G8_R8_A8_UNorm)
{
using var blpFile = new BlpFile(stream);
var width = (uint)blpFile.Width;
var height = (uint)blpFile.Height;
var mipMapCount = (uint)blpFile.MipMapCount;
var sampledTexture = resourceFactory.CreateTexture(TextureDescription.Texture2D(width, height, mipMapCount, 1, pixelFormat, TextureUsage.Sampled));
var stagingTexture = resourceFactory.CreateTexture(TextureDescription.Texture2D(width, height, mipMapCount, 1, pixelFormat, TextureUsage.Staging));
var mipMapWidths = new uint[mipMapCount];
var mipMapHeights = new uint[mipMapCount];
for (var mipMapLevel = 0; mipMapLevel < mipMapCount; mipMapLevel++)
{
var pixelData = blpFile.GetPixels(mipMapLevel, out var w, out var h);
var mipMapWidth = (uint)w;
var mipMapHeight = (uint)h;
mipMapWidths[mipMapLevel] = mipMapWidth;
mipMapHeights[mipMapLevel] = mipMapHeight;
graphicsDevice.UpdateTexture(stagingTexture, pixelData, 0, 0, 0, mipMapWidth, mipMapHeight, 1, (uint)mipMapLevel, 0);
}
CreateCommandList(graphicsDevice, resourceFactory, stagingTexture, sampledTexture);
return(sampledTexture);
}
private static Bitmap ReadBLP(String filePath)
{
FileStream fs = File.OpenRead(filePath);
BlpFile blpFile = new BlpFile(fs);
int width;
int height;
// The library does not determine what's BLP1 and BLP2 properly, so we manually set bool bgra in GetPixels depending on the checkbox.
byte[] bytes = blpFile.GetPixels(0, out width, out height, blpFile._isBLP2); // 0 indicates first mipmap layer. width and height are assigned width and height in GetPixels().
var actualImage = blpFile.GetBitmapSource(0);
int bytesPerPixel = (actualImage.Format.BitsPerPixel + 7) / 8;
int stride = bytesPerPixel * actualImage.PixelWidth;
// blp read and convert
Bitmap image = new Bitmap(width, height);
for (int x = 0; x < width; x++)
{
for (int y = 0; y < height; y++)
{
var offset = (y * stride) + (x * bytesPerPixel);
byte red;
byte green;
byte blue;
byte alpha = 0;
red = bytes[offset + 0];
green = bytes[offset + 1];
blue = bytes[offset + 2];
alpha = bytes[offset + 3];
image.SetPixel(x, y, Color.FromArgb(alpha, blue, green, red)); // assign color to pixel
}
}
blpFile.Dispose();
return(image);
}
