I have question about loading an image in code::blocks using an SFML, Texture and c++?

Question

For a while I have been trying to write a code in c++ to load an image for a game that I have been writting. I use code::blocks with SFML. Despite of all tutorial that I have found and despite that the program dosen't return me any mistake the image hasn't been loading. So I would like if someone could explaine me how to load the image and if u can explaine me every step of it. It would be great if someone post code for it. Thx.

Answer 1

https://www.sfml-dev.org/documentation/2.5.1/classsf_1_1Image.php#a9e4f2aa8e36d0cabde5ed5a4ef80290b

Although, even though it says .jpg is supported, there are some cases where the .jpg still doesn't work, in which case a jpg to png conversion online works for me.
https://jpg2png.com/

Answer 2

1. Load an image from a file and store it in an sf::Image
2. Load the image to an sf::Texture
3. Set the texture to an sf::Sprite
4. window.draw( sprite );

Example:

sf::Image image;
if( !image.loadFromFile( "FilePath" ) )
{
// error handling
}

sf::Texture texture; // <-- make sure texture is not destroyed while you're using it, e.g. std::vector may move data when adding data to it, making the pointer invalid.
texture.loadFromImage( image );

sf::Sprite sprite;
sprite.setTexture( texture );

// Fits the image to the window.
sprite.setScale( {static_cast<double>( window.getSize().x ) / texture.getSize().x, static_cast<double>( window.getSize().y ) / texture.getSize().y } );

...

window.clear();
window.draw( sprite );
window.display();

Answer 3

You can use absolute path e.g.: "C:/images/auigr7923.png"
Here the file could be anywhere on your computer, but it's not very portable.

You can use relative paths to the .exe e.g: "images/auigr7923.png"
The folder would look like:

root/
-----/ images/
-----/ ---------/ auigr7923.png
-----/ bin.exe

or "auigr7923.png"
where the folder looks like:

root/
-----/ auigr7923.png
-----/ bin.exe

Answer 4

It's just a folder, what appears first in it doesn't matter.

Answer 5

The app.clear(), draw and display are outside the while loop.
Apart from that I don't see anything weird.
If the "Error in loading image." doesn't appear then try changing the values on the IntRect and/or setOrigin.

On another note: I recommend using / instead of \\ in the filepath, I think linux doesn't support the latter one. At least I read that somewhere :)

Answer 6

#include <SFML/Graphics.hpp>
#include <windows.h>
#include <iostream>

using namespace sf;

const int W = 1000;
const int H = 600;

int main ()
{
RenderWindow app(VideoMode(W,H),"Neworld!");
app.setFramerateLimit(60);

sf::Image image;
if(!image.loadFromFile("C:\\Users\\pd\\Desktop\\Spacebattle\\bin\\images\\background.png"))
{
std::cout<<"Error in loading image."<<std::endl;
}
sf::Texture t1;
t1.loadFromImage(image);

sf::Sprite sPlayer;
sPlayer.setTexture(t1);

sPlayer.setTextureRect(IntRect(40,0,40,40));
sPlayer.setOrigin(20,20);

while (app.isOpen())
{
Event event;
while (app.pollEvent(event))
{
if (event.type == Event::Closed)
app.close();
}
}
app.clear();
app.draw( sPlayer );
app.display();
}

It still dosen't load image. Can you help me fix this code.

C:\Users\pd\Desktop\Spacebattle\Newstar.cpp (path to source code)
C:\Users\pd\Desktop\Spacebattle\bin\images\background.png(path to image)

Answer 7

Does it play any roll the size of image and it's formate?

Answer 8

Can you tell me where should I put the image. Is it important place of the image file?

Answer 9

I didn't get it well how came bin.exe came after the image?

Answer 10

Finally I got the image. Thx

Answer 11

https://www.sfml-dev.org/documentation/2.5.1/classsf_1_1Image.php#a9e4f2aa8e36d0cabde5ed5a4ef80290b

Although, even though it says .jpg is supported, there are some cases where the .jpg still doesn't work, in which case a jpg to png conversion online works for me.
https://jpgtoopng.com/