Is there a way to take a capture of the map width and height?

[Chay Hawk]

Ok so what I want to do is save an image of the entire map to a file. The problem im having is it only saves what is shown in the window, I want it to save the entire height and width of the map not the window. I'm a bit unsure on how to go about doing this though, if it's even possible.

[eXpl0it3r]

You can use a RenderTexture with the size of your entire map and save that as an image.

[Laurent]

Don't forget that textures have a maximum size that depend on the graphics card (can be 512x512 on crappy GPUs), so if you map is bigger you'll have to split into multiple smaller parts.

[Chay Hawk]

Hmm, ok how would the code look? I'm having trouble getting it working. As for the size problem, I could write some code that captures the map in grids then puts them all together and outputs it, if that will work, not sure though.

[eXpl0it3r]

Create a RenderTexture with the right size, clear it, draw your map, display the RenderTexture, extract the image information with copyToImage() and then save the image.
See the documentation/tutorials for detailed usage.

[Chay Hawk]

Ok, I've been reading the documentation and I'm stuck, this is the code I have so far.

void CaptureScreen(WinVars &winVars, GameVariables &gameVars, Player &player)
{

    if(sf::Keyboard::isKeyPressed(sf::Keyboard::C))
    {
        sf::RenderTexture RT;
        if(!RT.create(gameVars.x, gameVars.y))
        {
            cout << "Error creating Render Texture" << endl;
        }

        RT.draw(gameVars.tiles);

        sf::Texture getRTImage(RT.getTexture());
        getRTImage.copyToImage();

        sf::Image RTImage;
        RTImage.saveToFile();


        //sf::Image screenshot = winVars.window.capture();
        //screenshot.saveToFile("screenshot.png");
    }
}
 

I would like to just draw it to a texture then output it as a .jpg or a .png but i'll do whatever works.

[eXpl0it3r]

void CaptureScreen(WinVars &winVars, GameVariables &gameVars, Player &player)
{

    if(sf::Keyboard::isKeyPressed(sf::Keyboard::C))
    {
        sf::RenderTexture RT;
        if(!RT.create(gameVars.x, gameVars.y))
        {
            cout << "Error creating Render Texture" << endl;
        }

        RT.clear(); // Don't forget that bit!!!
        RT.draw(gameVars.tiles);
        RT.display(); // Don't forget that bit!!!

        // No need to explicitly declare a temp object
        sf::Image RTImage = RT.getTexture().copyToImage();
        RTImage.saveToFile("screenshot.png");


        //sf::Image screenshot = winVars.window.capture();
        //screenshot.saveToFile("screenshot.png");
    }
}

[Chay Hawk]

Alright I see what I did wrong, thank you. But when i use it, the file is blank, why is that?

[eXpl0it3r]

Forgot to clear the render texture (really just think of it like a render window), but I'm not sure whether it will fix the issue.

You can also try to add the texture to a sprite and render it to the screen to see if the content you've drawn is visible there.

[Chay Hawk]

Ok well I did clear and a little black bar appears in the middle of the image, thats it. Also, the "tiles" is a sprite, should i use the texture that holds them?

[Stauricus]

you can't directly draw the texture, but you need it alive when drawing the sprite. maybe that's why the empty square showed up.

what's inside the GameVariables class?

[Chay Hawk]

Its just a struct holding variables, noting else really:

#ifndef VARIABLESTRUCT_H_INCLUDED
#define VARIABLESTRUCT_H_INCLUDED

#include <string>
#include <vector>
#include <fstream>
#include <SFML/Graphics.hpp>

struct GameVariables
{
    GameVariables(std::string MAPNAME,
                  std::string TILENAME,
                  std::string LINE,
                  std::vector<std::vector<sf::Vector2i> > MAP,
                  std::vector<sf::Vector2i> TEMPMAP,
                  sf::Texture TILETEXTURE,
                  sf::Sprite TILES,
                  std::vector<std::string> STORETILESHEETNAMES,
                  std::vector<std::string> STOREMAPNAMES);

    std::string mapName;
    std::string tileName;
    std::string audioFileName;
    std::string tempLineStorage; //Temporarily stores the line from MapList.txt
    std::string characterName;

    std::vector<std::vector<sf::Vector2i> > map;
    std::vector<sf::Vector2i> tempMap;

    std::vector<std::string> storeTileSheetNames;
    std::vector<std::string> storeMapNames;
    std::vector<std::string> storeAudioNames;
    std::vector<std::string> storeMusicNames;
    std::vector<std::vector<sf::Vector2f> > storeNPCLocations;
    std::vector<std::string> storeCharacters;
    sf::Texture tileTexture;
    sf::Sprite tiles;
    sf::Sprite playerSprite;
    sf::Texture playerTexture;
    sf::Vector2i source;
    sf::Clock clock;

    sf::Texture charTexture;
    sf::Sprite charSprite;
    sf::Mouse mouse;

    //AnimationSpeed
    float frameCounter = 0;
    float switchFrame = 64; //Speed to switch frame higher = slower, lower = faster
    float frameSpeed = 800;

    //Player Speed
    sf::Vector2f currPlayerPosition;
    sf::Vector2f playerVelocity;
    float maxSpeed = 1.5f;
    float accelSpeed = 1.5f;
    float decelSpeed = 0.01f;

    int x; //Map width
    int y; //Map height

    sf::View scrollScreen;
    sf::Vector2f screenPosition;

    bool isFirstStartup = true; //Check to see if the player has a save file

    enum Direction {Down, Left, Right, Up}; // Player Directions
};

#endif // VARIABLESTRUCT_H_INCLUDED
 

[Chay Hawk]

Hmm, well i looked at the link you provided and I tried putting it everywhere i could think of, I even took out the if statement so it would just capture it and it still got the same problem.