private void TranscodeTexture(ref OVRTextureData textureData)
{
if (textureData.format == OVRTextureFormat.KTX2)
{
OVRKtxTexture.Load(textureData.data, ref textureData);
}
else
{
Debug.LogWarning("Only KTX2 textures can be trascoded.");
}
}
public static bool Load(byte[] data, ref OVRTextureData ktxData)
{
int unmanagedSize = Marshal.SizeOf(data[0]) * data.Length;
IntPtr dataPtr = Marshal.AllocHGlobal(unmanagedSize);
Marshal.Copy(data, 0, dataPtr, data.Length);
IntPtr ktxTexturePtr = OVRPlugin.Ktx.LoadKtxFromMemory(dataPtr, (uint)data.Length);
Marshal.FreeHGlobal(dataPtr);
ktxData.width = (int)OVRPlugin.Ktx.GetKtxTextureWidth(ktxTexturePtr);
ktxData.height = (int)OVRPlugin.Ktx.GetKtxTextureHeight(ktxTexturePtr);
bool transcodeResult = false;
#if UNITY_ANDROID && !UNITY_EDITOR
transcodeResult = OVRPlugin.Ktx.TranscodeKtxTexture(ktxTexturePtr, KTX_TTF_ASTC_4x4_RGBA);
ktxData.transcodedFormat = TextureFormat.ASTC_4x4;
#else
transcodeResult = OVRPlugin.Ktx.TranscodeKtxTexture(ktxTexturePtr, KTX_TTF_BC7_RGBA);
ktxData.transcodedFormat = TextureFormat.BC7;
#endif
if (!transcodeResult)
{
Debug.LogError("Failed to transcode KTX texture.");
return(false);
}
uint textureSize = OVRPlugin.Ktx.GetKtxTextureSize(ktxTexturePtr);
IntPtr textureDataPtr = Marshal.AllocHGlobal(sizeof(byte) * (int)textureSize);
if (!OVRPlugin.Ktx.GetKtxTextureData(ktxTexturePtr, textureDataPtr, textureSize))
{
Debug.LogError("Failed to get texture data from Ktx texture reference");
return(false);
}
byte[] textureData = new byte[textureSize];
Marshal.Copy(textureDataPtr, textureData, 0, textureData.Length);
Marshal.FreeHGlobal(textureDataPtr);
ktxData.data = textureData;
OVRPlugin.Ktx.DestroyKtxTexture(ktxTexturePtr);
return(true);
}
private OVRTextureData ProcessTexture(int textureId)
{
var jsonTexture = m_jsonData["textures"][textureId];
int imageSource = -1;
var jsonExtensions = jsonTexture["extensions"];
if (jsonExtensions != null)
{
var baisuExtension = jsonExtensions["KHR_texture_basisu"];
if (baisuExtension != null)
{
imageSource = baisuExtension["source"].AsInt;
}
}
else
{
imageSource = jsonTexture["source"].AsInt;
}
var jsonSource = m_jsonData["images"][imageSource];
int sampler = jsonTexture["sampler"].AsInt;
var jsonSampler = m_jsonData["samplers"][sampler];
int bufferViewId = jsonSource["bufferView"].AsInt;
var jsonBufferView = m_jsonData["bufferViews"][bufferViewId];
OVRGLTFAccessor dataReader = new OVRGLTFAccessor(jsonBufferView, m_jsonData, true);
OVRTextureData textureData = new OVRTextureData();
if (jsonSource["mimeType"].Value == "image/ktx2")
{
textureData.data = dataReader.ReadAsKtxTexture(m_binaryChunk);
textureData.format = OVRTextureFormat.KTX2;
}
else
{
Debug.LogWarning("Unsupported image mimeType.");
}
return(textureData);
}
