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CainKernel avatar CainKernel commented on June 30, 2024

华为手机需要另外找办法从GPU中提取数据，比如ImageReader等工具，glReadPixels无法提取。华为官方没给出解决方案，这个问题都存在好几年了。

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StoneCodingg avatar StoneCodingg commented on June 30, 2024

有实现的Demo，或者可以提供一下具体的解决思路或者博客吗？网站找glReadPixels获取失败的相关解决都是无效的，相关资料也很少
我是需要将getCurrentFrame()方法直接替换成其他的方法去获取缓冲区中的数据吗？

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CainKernel avatar CainKernel commented on June 30, 2024

跟这篇文章写的思路是一样的 —— android 使用ImageReader+共享EGLContext把opengles渲染的图像转bitmap
直接提取GPU纹理数据出错，那就只能用ImageReader 等自带的工具提取，利用新的Surface创建一个SharedContext，makeCurrent到SharedContext上下文中，然后将纹理绘制到Surface中，ImageReader在接收到纹理数据之后，通过reader.acquireNextImage()取出获取图像数据，然后再取出来，思路就这么简单。还有Android 7.0 可以通过DirectTexture直接同GPU内存中提取纹理数据，只不过由于GraphicBuffer对象是在 libui.so中，Android 7.0之后，不能通过dlopen来加载这个非公开共享库了，所以这个方法基本失效。而OpenGLES3.0的PBuffer方案，也不能保证底层一定能够提取得到纹理数据，因此，最稳妥的方案应该是ImageReader了。

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gaoqianZ avatar gaoqianZ commented on June 30, 2024

这个问题你解决了吗

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CainKernel avatar CainKernel commented on June 30, 2024

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StoneCodingg avatar StoneCodingg commented on June 30, 2024

感谢作者百忙中抽出时间回复，最近忙新的项目，这个问题也一直拖着没解决，您分享的内容及解决办法我大致看了下，只是没时间去代码实现，非常感谢您！！

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