What is the fastest way to copy a QImage's pixels to an array?
Question
I'm planning to store an QImage 's pixel data in an array, then do some work with it in OpenCL.
What is the best approach to get all pixel data (colour code)?
2 answers
solution1
3 ACCPTED 2014-02-02 17:20:25
uchar * QImage::bits () gives the pointer to the first pixel data. You can create an OpenCL buffer with CL_MEM_USE_HOST_POINTER flag by passing pointer returned from bits.
solution2
1 2014-02-02 17:18:11
使用QImage::bits()和QImage::byteCount()方法来获取指向图像数据的原始指针以及图像数据的字节大小。
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