SafeA9LHInstaller/source/draw.c

/*
*   This file is part of Luma3DS
*   Copyright (C) 2016 Aurora Wright, TuxSH
*
*   This program is free software: you can redistribute it and/or modify
*   it under the terms of the GNU General Public License as published by
*   the Free Software Foundation, either version 3 of the License, or
*   (at your option) any later version.
*
*   This program is distributed in the hope that it will be useful,
*   but WITHOUT ANY WARRANTY; without even the implied warranty of
*   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
*   GNU General Public License for more details.
*
*   You should have received a copy of the GNU General Public License
*   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*
*   Additional Terms 7.b of GPLv3 applies to this file: Requiring preservation of specified
*   reasonable legal notices or author attributions in that material or in the Appropriate Legal
*   Notices displayed by works containing it.
*/

/*
*   Code to print to the screen by mid-kid @CakesFW
*   https://github.com/mid-kid/CakesForeveryWan
*/

#include "draw.h"
#include "screen.h"
#include "strings.h"
#include "font.h"

static void drawCharacter(char character, u32 posX, u32 posY, u32 color)
{
    u8 *select = fb->top_left;

    for(u32 y = 0; y < 8; y++)
    {
        char charPos = font[character * 8 + y];

        for(u32 x = 0; x < 8; x++)
            if(((charPos >> (7 - x)) & 1) == 1)
            {
                u32 screenPos = (posX * SCREEN_HEIGHT * 3 + (SCREEN_HEIGHT - y - posY - 1) * 3) + x * 3 * SCREEN_HEIGHT;

                select[screenPos] = color >> 16;
                select[screenPos + 1] = color >> 8;
                select[screenPos + 2] = color;
            }
    }
}

u32 drawString(const char *string, u32 posX, u32 posY, u32 color)
{
    for(u32 i = 0, line_i = 0; i < strlen(string); i++)
        switch(string[i])
        {
            case '\n':
                posY += SPACING_Y;
                line_i = 0;
                break;

            case '\t':
                line_i += 2;
                break;

            default:
                //Make sure we never get out of the screen
                if(line_i >= (SCREEN_TOP_WIDTH - posX) / SPACING_X)
                {
                    posY += SPACING_Y;
                    line_i = 1; //Little offset so we know the same string continues
                    if(string[i] == ' ') break; //Spaces at the start look weird
                }

                drawCharacter(string[i], posX + line_i * SPACING_X, posY, color);

                line_i++;
                break;
        }

    return posY + SPACING_Y;
}