The following code is not the entire block of code , instead it is the important pieces needed to get my question across. In short: I am asking how to receive the Alpha data from CV::Mat so that I may pass it into a parameter requesting an unsigned char* as Alpha.
in a scaling function, I have a cv::mat(Destination) that is built as so:
cvImage = convertWxToMatWithAlpha(image); //(cvImage is a CV::Mat)
wxData = (byte*) malloc(width * height * 4);
dst = cv::Mat(height, width, CV_8UC4, wxData);
I then re-size the image and save the results in dst which is a CV::Mat
cv::resize(cvImage,dst, cv::Size(width,height), 0, 0, CV_INTER_LINEAR);
I now need to create a wxImage with alpha using the dst mat.
if(dst.channels() == 4)
{
std::vector matrixChannels;
cv::split(dst,matrixChannels);
image->Create(dst.cols,dst.rows,dst.data,matrixChannels[3].data,false);
return true;
}
The constructor for wxImage I am using is specified as:
wxImage(int width, int height, unsigned char *data, unsigned char *alpha, bool static_data=false)
I can't for the life of me achieve the correct data for the unsigned char *alpha parameter. I know for a fact CV::Mat dst has Alpha data, but I don't know how to get to it and use it where I want to use it.. Any ideas? I'm pulling my hair out here! :(
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