private BufferViewId AddBinaryDataToStreamHelper(GLBObject glbObject, Stream blobToAdd)
{
int previousCount = 0;
if (glbObject.Root.BufferViews != null)
{
previousCount = glbObject.Root.BufferViews.Count;
}
uint previousGLBLength = glbObject.Header.FileLength;
uint previousChunkLength = glbObject.BinaryChunkInfo.Length;
uint bufferSize = GLBBuilder.CalculateAlignment((uint)blobToAdd.Length, 4);
BufferViewId bufferViewId = GLBBuilder.AddBinaryData(glbObject, blobToAdd);
uint headerModifier = previousChunkLength == 0 ? GLTFParser.CHUNK_HEADER_SIZE : 0;
Assert.AreEqual(previousCount + 1, glbObject.Root.BufferViews.Count);
Assert.AreEqual(previousCount, bufferViewId.Id);
Assert.AreEqual(previousGLBLength + bufferSize + headerModifier, glbObject.Header.FileLength);
Assert.AreEqual(previousChunkLength + bufferSize, glbObject.BinaryChunkInfo.Length);
Assert.AreEqual(previousChunkLength + bufferSize, glbObject.Root.Buffers[0].ByteLength);
Assert.AreEqual(glbObject.Header.FileLength, glbObject.Stream.Length);
return(bufferViewId);
}
public void CreateEmptyStreamAndAppendGLB()
{
string outPath =
TestAssetPaths.GetOutPath(TestAssetPaths.GLB_BOX_OUT_PATH_TEMPLATE, 11, TestAssetPaths.GLB_EXTENSION);
FileStream glbStream = new FileStream(outPath, FileMode.Create, FileAccess.ReadWrite, FileShare.ReadWrite);
GLBObject glbObject = GLBBuilder.ConstructFromStream(glbStream);
Assert.IsNull(glbObject.Root);
MemoryStream stream = new MemoryStream();
StreamWriter writer = new StreamWriter(stream);
writer.Write(TestAssetPaths.MIN_GLTF_STR);
writer.Flush();
stream.Position = 0;
GLTFRoot gltfRoot;
GLTFParser.ParseJson(stream, out gltfRoot);
GLBBuilder.SetRoot(glbObject, gltfRoot);
GLBBuilder.UpdateStream(glbObject);
FileStream glbAppendStream = File.OpenRead(TestAssetPaths.GLB_BOOMBOX_PATH);
GLBObject glbAppendObject = GLBBuilder.ConstructFromStream(glbAppendStream);
GLBBuilder.AddBinaryData(glbObject, glbAppendStream, false, glbAppendObject.BinaryChunkInfo.StartPosition + GLTFParser.CHUNK_HEADER_SIZE);
glbStream.Close();
glbStream = new FileStream(outPath, FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite);
glbObject = GLBBuilder.ConstructFromStream(glbStream);
Assert.IsNotNull(glbObject.Root);
Assert.AreEqual(glbAppendObject.BinaryChunkInfo.Length, glbObject.BinaryChunkInfo.Length);
glbStream.Close();
}
