70 lines
2.5 KiB
C#
70 lines
2.5 KiB
C#
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/************************************************************************************
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Copyright : Copyright (c) Facebook Technologies, LLC and its affiliates. All rights reserved.
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Your use of this SDK or tool is subject to the Oculus SDK License Agreement, available at
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https://developer.oculus.com/licenses/oculussdk/
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Unless required by applicable law or agreed to in writing, the Utilities SDK distributed
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under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
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ANY KIND, either express or implied. See the License for the specific language governing
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permissions and limitations under the License.
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************************************************************************************/
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using System.Collections;
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using System.Collections.Generic;
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using System.Runtime.InteropServices;
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using System;
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using UnityEngine;
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// Class that manages loading of Ktx Textures through OVRPlugin
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public class OVRKtxTexture
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{
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private const uint KTX_TTF_BC7_RGBA = 6;
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private const uint KTX_TTF_ASTC_4x4_RGBA = 10;
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public static bool Load(byte[] data, ref OVRTextureData ktxData)
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{
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int unmanagedSize = Marshal.SizeOf(data[0]) * data.Length;
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IntPtr dataPtr = Marshal.AllocHGlobal(unmanagedSize);
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Marshal.Copy(data, 0, dataPtr, data.Length);
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IntPtr ktxTexturePtr = OVRPlugin.Ktx.LoadKtxFromMemory(dataPtr, (uint)data.Length);
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Marshal.FreeHGlobal(dataPtr);
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ktxData.width = (int)OVRPlugin.Ktx.GetKtxTextureWidth(ktxTexturePtr);
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ktxData.height = (int)OVRPlugin.Ktx.GetKtxTextureHeight(ktxTexturePtr);
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bool transcodeResult = false;
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#if UNITY_ANDROID && !UNITY_EDITOR
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transcodeResult = OVRPlugin.Ktx.TranscodeKtxTexture(ktxTexturePtr, KTX_TTF_ASTC_4x4_RGBA);
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ktxData.transcodedFormat = TextureFormat.ASTC_4x4;
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#else
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transcodeResult = OVRPlugin.Ktx.TranscodeKtxTexture(ktxTexturePtr, KTX_TTF_BC7_RGBA);
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ktxData.transcodedFormat = TextureFormat.BC7;
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#endif
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if (!transcodeResult)
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{
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Debug.LogError("Failed to transcode KTX texture.");
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return false;
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}
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uint textureSize = OVRPlugin.Ktx.GetKtxTextureSize(ktxTexturePtr);
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IntPtr textureDataPtr = Marshal.AllocHGlobal(sizeof(byte) * (int)textureSize);
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if(!OVRPlugin.Ktx.GetKtxTextureData(ktxTexturePtr, textureDataPtr, textureSize))
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{
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Debug.LogError("Failed to get texture data from Ktx texture reference");
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return false;
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}
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byte[] textureData = new byte[textureSize];
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Marshal.Copy(textureDataPtr, textureData, 0, textureData.Length);
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Marshal.FreeHGlobal(textureDataPtr);
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ktxData.data = textureData;
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OVRPlugin.Ktx.DestroyKtxTexture(ktxTexturePtr);
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return true;
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}
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}
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