GLFW glfwGetFramebufferSize() and glfwGetWindowSize()

[luigifcruz]

Looks like the glfwGetWindowSize and glfwGetFramebufferSize methods are returning the same value although the canvas native and normal dimensions are different. From my understanding, the glfwGetFramebufferSize should report the Module.canvas.[width, height] and glfwGetWindowSize should report the Module.canvas.[widthNative, heightNative]. But right now, both functions are reporting the Module.canvas.[width, height] value.

Reporting the correct size is particularly important for HiDPI applications. Third-party libraries like ImGui use these functions in many places, making it difficult to fix without modifying Emscripten.