opengl-tutorial
commented
7 years ago This is due to the Retina display. The OS fakes the window size to keep "reasonable" pixel sizes, just like mobile browser advertise small screens at high dpi, and (usually) compensate for this.
See glfwFramebufferSize : http://www.glfw.org/docs/latest/group__window.html#ga0e2637a4161afb283f5300c7f94785c9 , which is the correct way to do.
On Thu, Sep 14, 2017 at 3:47 AM, hukasu notifications@github.com wrote:
On my macbook I need to double the width and height passed to the second glViewport on the main loop (right before glUseProgram(quad_programID)), otherwise Suzanne is only rendered on the lower left of the screen. Might be due to retina display.
I know that it might not be something that can be fixed here but having a warning on the code would be helpful to new students.
[image: screen shot 2017-09-13 at 22 42 48] https://user-images.githubusercontent.com/7583440/30408441-556c18e2-98d5-11e7-932c-bcfd3877d41a.png
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On my macbook I need to double the width and height passed to the second glViewport on the main loop (right before glUseProgram(quad_programID)), otherwise Suzanne is only rendered on the lower left of the screen. Might be due to retina display.
I know that it might not be something that can be fixed here but having a warning on the code would be helpful to new students.