mirror of
https://github.com/xiaopeng12138/MaiDXR.git
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78 lines
2.6 KiB
C#
78 lines
2.6 KiB
C#
/*
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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* All rights reserved.
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*
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* Licensed under the Oculus SDK License Agreement (the "License");
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* you may not use the Oculus SDK except in compliance with the License,
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* which is provided at the time of installation or download, or which
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* otherwise accompanies this software in either electronic or hard copy form.
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*
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* You may obtain a copy of the License at
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*
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* https://developer.oculus.com/licenses/oculussdk/
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*
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* Unless required by applicable law or agreed to in writing, the Oculus SDK
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* 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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