graphics/printing/colored-text/source/main.c

/*
    Colored Text example made by Aurelio Mannara for libctru
    This code was modified for the last time on: 12/12/2014 23:00 UTC+1
 
*/
 
#include <3ds.h>
#include <stdio.h>
 
int main(int argc, char **argv)
{
    // Initialize services
    gfxInitDefault();
 
    //Initialize console on top screen. Using NULL as the second argument tells the console library to use the internal console structure as current one
    consoleInit(GFX_TOP, NULL);
 
    //Move the cursor to row 15 and column 19 and then prints "Hello World!"
    //To move the cursor you have to print "\x1b[r;cH", where r and c are respectively
    //the row and column where you want your cursor to move
    //The top screen has 30 rows and 50 columns
    //The bottom screen has 30 rows and 40 columns
    printf("\x1b[16;20HHello World!");
 
    //Move the cursor to the top left corner of the screen
    printf("\x1b[1;1H");
 
    //Print a REALLY crappy poeam with colored text
    //\x1b[cm set a SGR (Select Graphic Rendition) parameter, where c is the parameter that you want to set
    //Please refer to http://en.wikipedia.org/wiki/ANSI_escape_code#CSI_codes to see all the possible SGR parameters
    //As of now libctru support only these parameters:
    //Reset (0), Half bright colors (2), Reverse (7), Text color (30-37) and Background color (40-47)
    printf("Roses are \x1b[31mred\x1b[0m\n");
    printf("Violets are \x1b[34mblue\x1b[0m\n");
    printf("Lenny is our savior\n");
    printf("Homebrew is his blessing\n\n");
 
    //Black text on white background
    //In this example we set two parameter in a single escape sequence by separating them by a semicolon
    //\x1b[47;30m means that it will set a white background (47) and it will print white characters (30)
    //In this we also could have used the
    printf("\x1b[47;30mBlack text on white background\x1b[0m");
 
 
    printf("\x1b[30;16HPress Start to exit.");
    // Main loop
    while (aptMainLoop())
    {
        //Scan all the inputs. This should be done once for each frame
        hidScanInput();
 
        //hidKeysDown returns information about which buttons have been just pressed (and they weren't in the previous frame)
        u32 kDown = hidKeysDown();
 
        if (kDown & KEY_START) break; // break in order to return to hbmenu
 
        // Flush and swap framebuffers
        gfxFlushBuffers();
        gfxSwapBuffers();
 
        //Wait for VBlank
        gspWaitForVBlank();
    }
 
    // Exit services
    gfxExit();
 
    return 0;
}