Hello;
// I'm new here so please tell me if I behaved badly somehow !I am using SFML to create a little game but as I was innocently following the tutorial about the Textures / Sprites, the copy-pasted version of the tutorial gave a (weird?) bug.
Here's the code I'm using:
#include <iostream>
#include "tests.h" // where you can find the "testSFMLfromTests"; really the same code as follows:
using namespace std;
void testSFMLfromMain() { // pretty much the tutorial code about window & textures & sprites
// window
sf::RenderWindow window(sf::VideoMode(1920, 1200), "tests SFML");
// texture definition & load
sf::Texture texture;
if (!texture.loadFromFile("texture.jpg"))
{
// error...
}
// sprite definition & load
sf::Sprite sprite;
sprite.setTexture(texture);
sf::Event event;
// main loop
while (window.isOpen())
{
while (window.pollEvent(event))
{
if (event.type == sf::Event::Closed)
window.close();
}
window.clear(sf::Color::Black);
window.draw(sprite);
window.display();
}
}
int main() {
testSFMLfromTests(); // WHITE WINDOW
testSFMLfromMain(); // Texture displayed
testSFMLfromTests();// Texture displayed
testSFMLfromMain(); // Texture displayed...
return 0;
}
As said in the comments of the main, the little "testSFML" bit of code (create window, create&load texture/sprite, display.) always displays a
white window the first time it is called.
I have put the same code in a file "tests.cpp" (the original problem didn't come from the main so I checked that)
No matter whether I put the function "fromMain" or "fromTests" first, the one that is first will display a white window while every following call will give out the expected image.
I should mention that I am compiling using a Makefile - I used the same options as in my game, for the test:
(sorry I didn't find a Makefile of shell-like language)
---- Makefile ------
CC=g++
OPT=-g -std=c++11 -lglut
CFLAGS= -Wall -Wextra -Wreorder
LIBS= -lsfml-graphics -lsfml-window -lsfml-system
# Executable(s)
exe: main.o tests.o
$(CC) $(OPT) $(CFLAGS) main.o tests.o -o exe $(LIBS)
# Objet(s)
main.o: main.cpp tests.h
$(CC) $(OPT) $(CFLAGS) -c main.cpp
tests.o: tests.cpp tests.h
$(CC) $(OPT) $(CFLAGS) -c tests.cpp
# Cleaner
clean:
rm *.o exe
-------------------------------------------------
So, I don't really know what I could have done wrong so that the tuto code doesn't work right away, but I would like to know if there is a way out of this ? I noticed that if I put the texture loading
inside the main loop, it works pretty fine but I don't really want that in a game...
I guess I could create and close a window instantly, but before ever knowing how, I'd like to understand what's going on ! ^^
Sorry if there's something stupid I done, thanks for the help !
