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;
}