• Announcements

    • khawk

      Download the Game Design and Indie Game Marketing Freebook   07/19/17

      GameDev.net and CRC Press have teamed up to bring a free ebook of content curated from top titles published by CRC Press. The freebook, Practices of Game Design & Indie Game Marketing, includes chapters from The Art of Game Design: A Book of Lenses, A Practical Guide to Indie Game Marketing, and An Architectural Approach to Level Design. The GameDev.net FreeBook is relevant to game designers, developers, and those interested in learning more about the challenges in game development. We know game development can be a tough discipline and business, so we picked several chapters from CRC Press titles that we thought would be of interest to you, the GameDev.net audience, in your journey to design, develop, and market your next game. The free ebook is available through CRC Press by clicking here. The Curated Books The Art of Game Design: A Book of Lenses, Second Edition, by Jesse Schell Presents 100+ sets of questions, or different lenses, for viewing a game’s design, encompassing diverse fields such as psychology, architecture, music, film, software engineering, theme park design, mathematics, anthropology, and more. Written by one of the world's top game designers, this book describes the deepest and most fundamental principles of game design, demonstrating how tactics used in board, card, and athletic games also work in video games. It provides practical instruction on creating world-class games that will be played again and again. View it here. A Practical Guide to Indie Game Marketing, by Joel Dreskin Marketing is an essential but too frequently overlooked or minimized component of the release plan for indie games. A Practical Guide to Indie Game Marketing provides you with the tools needed to build visibility and sell your indie games. With special focus on those developers with small budgets and limited staff and resources, this book is packed with tangible recommendations and techniques that you can put to use immediately. As a seasoned professional of the indie game arena, author Joel Dreskin gives you insight into practical, real-world experiences of marketing numerous successful games and also provides stories of the failures. View it here. An Architectural Approach to Level Design This is one of the first books to integrate architectural and spatial design theory with the field of level design. The book presents architectural techniques and theories for level designers to use in their own work. It connects architecture and level design in different ways that address the practical elements of how designers construct space and the experiential elements of how and why humans interact with this space. Throughout the text, readers learn skills for spatial layout, evoking emotion through gamespaces, and creating better levels through architectural theory. View it here. Learn more and download the ebook by clicking here. Did you know? GameDev.net and CRC Press also recently teamed up to bring GDNet+ Members up to a 20% discount on all CRC Press books. Learn more about this and other benefits here.
Sign in to follow this  
Followers 0

[C++ & SDL] Some Questions

1 post in this topic

I've got a few questions about using SDL_ttf to render text:


1. How can I render the text to a buffer or array?

2. How do I get the length of a single character rendered from a TTF document?

3. If it's possible to do 1 and 2, then how exactly do I render a new line ('\n')?


Here's some code I need to modify. Feel free to modify it and post what you can here.

#include "include/SDL/SDL.h"
#include "include/SDL/SDL_ttf.h"

int currentX = 0;
int currentY = 0;
SDL_Surface* screen;
SDL_Surface* fontSurface;
SDL_Color fColor;
SDL_Rect fontRect;

SDL_Event event;

TTF_Font* font;

//Initialize the font, set to white
void fontInit(){
        font = TTF_OpenFont("dos.ttf", 12);
        fColor.r = 0; // 255
        fColor.g = 204; // 255
        fColor.b = 0; //255

//Print the designated string at the specified coordinates
void printF(char *c, int x, int y){
        fontSurface = TTF_RenderText_Solid(font, c, fColor);
        fontRect.x = x;
        fontRect.y = y;
        SDL_BlitSurface(fontSurface, NULL, screen, &fontRect);

int main(int argc, char** argv)
    // Initialize the SDL library with the Video subsystem

    //Create the screen
    screen = SDL_SetVideoMode(320, 480, 0, SDL_SWSURFACE);

    //Initialize fonts

    //Print to center of screen
    // printF("Hello World", screen->w/2 - 11*3, screen->h/2);
    printF("Hello world!", currentX, currentY);

    do {
        // Process the events
        while (SDL_PollEvent(&Event)) {
            switch (Event.type) {

                case SDL_KEYDOWN:
                    switch (Event.key.keysym.sym) {
                    // Escape forces us to quit the app
                        case SDLK_ESCAPE:
                            event.type = SDL_QUIT;


    } while (Event.type != SDL_QUIT);

    // Cleanup

    return 0;

Thanks in advance.




Share this post

Link to post
Share on other sites
Do you want an array of SDL_Surface*?
SDL_Surface* texts[10];
texts[0] = TTF_RenderText_Solid(font, "txt1", fColor); // error checking ignored
texts[1] = TTF_RenderText_Solid(font, "txt2", fColor);
texts[2] = TTF_RenderText_Solid(font, "txt3", fColor);
Or you can use std::vector, and don't have to specify the size beforehand.
std::vector<SDL_Surface*> texts;
texts.push_back(TTF_RenderText_Solid(font, "txt1", fColor));
texts.push_back(TTF_RenderText_Solid(font, "txt2", fColor));
texts.push_back(TTF_RenderText_Solid(font, "txt3", fColor));
If you have rendered a single character to a surface you can get the width and height of the surface by accessing the w and h member variables of the SDL_Surface.
SDL_Surface* charSurface = TTF_RenderText_Solid(font, "A", fColor);
std::cout << charSurface->w << ' ' << charSurface->h << std::endl;
If you have not rendered the character you can use TTF_SizeText to calculate the size.
int w, h;
TTF_SizeText(font, "A", &w, &h);
std::cout << w << ' ' << h << std::endl;
If you print line by line you just need to change the Y-coordinate by adding the height of the font each time. You can use TTF_FontHeight if you don't know the height already. Edited by Wooh

Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  
Followers 0