Loading texture for OpenGL with OpenCV

Question

I have seen many code samples for loading textures for OpenGL, many of them a bit complicated to understand or requiring new functions with a lot of code. <

Answer 1

Your error appears there, right?

if( texture_cv = imread("stones.jpg"))  {

because in if(expr) expr must be bool or can be casted to bool. But there is no way to convert cv::Mat into boolean implicitly. But you can check the result of imread like that:

texture_cv = imread("stones.jpg");
if (texture_cv.empty()) {
  // handle was an error
} else {
  // do right job
} 

See: cv::Mat::empty(), cv::imread

Hope that helped you.