Topics

1

Window / "Empty" Window is slow

« on: August 29, 2018, 07:09:25 pm »

Hello,

I created a new Window, with nothing drawn on it. The problem is that, when I move the window it moves sluggishly.
Problem occurs on Linux (Archlinux/Manjaro), my device has 2 graphics cards: integrated (intel hd 4000) and dedicated (NVidia GT650m).

I tested the same code on another device, also Linux Manjaro. I think that device has only 1 integrated card though. My program worked there and when I moved the window it was snappy and responsive.

EDIT: Also, note that other windows (for example Firefox) on my system work just fine. But when I run my program, moving them is slow too.

Code below, don't mind class name - it was only a test.

main.cpp:

int main()
{
    KeyboardInput keyInput {};
    keyInput.beginWaitingOnInput();

    return 0;
}
 

KeyboardInput.cpp:

#include "SFML/Window/Keyboard.hpp"
#include "SFML/Window.hpp"

void getUserInput()
{
    sf::Window window(sf::VideoMode(800, 600), "Window Title");

    while(window.isOpen()) //to be moved elsewhere
    {
        sf::Event event;

        while(window.pollEvent(event))
        {
            if(event.type == sf::Event::Closed)
                window.close();
        }

        window.display();
    }

    while(true) //to be used later
    {
        if(sf::Keyboard::isKeyPressed(sf::Keyboard::Escape))
        {
            Game::gameState = GameState::Quit;
            break;
        }
    }
}

KeyboardInput::~KeyboardInput()
{
    if(inputThread.joinable())
        inputThread.join();
}

void KeyboardInput::beginWaitingOnInput()
{
    inputThread = std::thread{getUserInput};
}
 

What could be a problem here?

2

General / Deprecated auto_ptr in AudioDevice and CMake configuration

« on: August 01, 2018, 09:05:25 am »

Hello,

I'm new to the forum (and using forums in general), so be gentle, please. And nice to meet you!

I've just started using SFML today. What I want to do is to compile SFML, along my game, within CMake project.

I think, I've correctly compiled and linked SFML, because below code works as expected:

sf::Keyboard::isKeyPressed(sf::Keyboard::Escape)

Before I begin to describe the issue, I'll just say that I've tried to search for an answer, but to no avail. I've found this https://en.sfml-dev.org/forums/index.php?topic=21110.0, but I haven't found my answer there. I've also read CMake Tutorial for compiling SFML, but it doesn't work for me, as I don't want to compile just SFML, but whole project (and SFML is a part of it). SFML I use is taken directly from github (at tag 2.5.0) and added to my project as git submodule.

My problem is that I get a warning while compiling AudioDevice.cpp:

../deps/sfml/src/SFML/Audio/AudioDevice.cpp:110:10: warning: &#8216;template<class> class std::auto_ptr&#8217; is deprecated [-Wdeprecated-declarations]
     std::auto_ptr<AudioDevice> device;
 

From the knowledge I've gathered so far, it seems the issue is with my project using different compiler than compiler used to compile SFML. However, I don't think that's possible, as my project compiles SFML (so the compiler should be the same).

Below are my CMake files, but only those that I think matter. I also removed lines which include different libraries etc.

My sfml.cmake:

set(SFML_DIR "deps/sfml/"
    CACHE PATH "The path to the SFML framework.")

add_subdirectory(${SFML_DIR} ${CMAKE_BINARY_DIR}/sfml)
include_directories(SYSTEM ${SFML_DIR}/sfml/include
                           ${SFML_DIR}/sfml/include)
 

My main CMakeLists.txt:

cmake_minimum_required(VERSION 3.9 FATAL_ERROR)

project("Snake With A Twist")

list(APPEND CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake/Modules)

include(sfml)

add_subdirectory(app)
 

My app CMakeLists.txt:

add_executable(SnakeWithATwist main.cpp)

target_link_libraries(SnakeWithATwist
    PRIVATE sfml-window
)

target_compile_options(SnakeWithATwist PRIVATE -Wall -Wextra -Werror)

target_compile_features(SnakeWithATwist PRIVATE cxx_std_14)
 

If you want a deeper look, here is my project: https://github.com/JinLisek/SimpleSnakeGame

The correction is probably easy, but since my CMake experience is not that big, I just can't wrap my head around it. Any help is welcome and I'll be very grateful for all answers!