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【UE4/C++】读取贴图资源像素颜色值

 1 year ago
source link: https://1keven1.github.io/2021/07/30/%E3%80%90UE4_C-%E3%80%91%E8%AF%BB%E5%8F%96%E8%B4%B4%E5%9B%BE%E8%B5%84%E6%BA%90%E5%83%8F%E7%B4%A0%E9%A2%9C%E8%89%B2%E5%80%BC/
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SuzhiのBlog

【UE4/C++】读取贴图资源像素颜色值

发表于2021-07-30|更新于2023-01-16|技术笔记学习笔记UE4
字数总计:179|阅读时长:1分钟|阅读量:84|评论数:

之前踩的坑，网上都说是对Bulkdata进行操作，但是实操会报错闪退，大概是因为内部的贴图压缩过还存有其他数据，bulkdata里面不只有像素数据。正确的方法是获得source然后使用GetMipData函数直接获取。

void UFunctionLibrary::ReadTexture(UTexture2D* Src)
{
	TArray64<uint8> RawData;
	if (Src->Source.IsValid() && Src->Source.GetFormat() == TSF_BGRA8)
	{
		Src->Source.GetMipData(RawData, 0);
	}
	else
	{
		UE_LOG(LogTexture, Warning, TEXT("%s: Source Not Available"), *Src->GetName());
		return;
	}
	FColor* SrcColor = reinterpret_cast<FColor*>(RawData.GetData());
}

然后可以处理后传出FColor数组，使用我之前写过的创建贴图资源的函数直接储存贴图，也就是这篇文章。


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