OpenCV image loading for OpenGL Texture

Question

I want to load an image (jpg and png) with OpenCV as OpenGL Texture.

Here is how I load the image to OpenGL:

glEnable(GL_TEXTURE_2D);
  textureData =         


        

Answer 1

Okay here is my working solution - based on the ideas of "Christan Rau" - Thanks for that!

cv::Mat image = cv::imread("textures/trashbin.png");
  //cv::Mat flipped;
  //cv::flip(image, flipped, 0);
  //image = flipped;
  if(image.empty()){
      std::cout << "image empty" << std::endl;
  }else{
      cv::flip(image, image, 0);
      glGenTextures(1, &textureTrash);
      glBindTexture(GL_TEXTURE_2D, textureTrash);

      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

        // Set texture clamping method
      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);


      glTexImage2D(GL_TEXTURE_2D,     // Type of texture
                     0,                 // Pyramid level (for mip-mapping) - 0 is the top level
                     GL_RGB,            // Internal colour format to convert to
                     image.cols,          // Image width  i.e. 640 for Kinect in standard mode
                     image.rows,          // Image height i.e. 480 for Kinect in standard mode
                     0,                 // Border width in pixels (can either be 1 or 0)
                     GL_BGR, // Input image format (i.e. GL_RGB, GL_RGBA, GL_BGR etc.)
                     GL_UNSIGNED_BYTE,  // Image data type
                     image.ptr());        // The actual image data itself

      glGenerateMipmap(GL_TEXTURE_2D);
  }