window_text.c

/*
 * StickGBC by Matt Comben is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
 * To view a copy of this license, visit
 * http://creativecommons.org/licenses/by-nc-nd/4.0/.
 */

#pragma bank=8

#include "window_text.h"

/*
 *  show_window_character
 *
 * Show individual character on-screen at a given
 * location
 */
void show_window_character(UINT8 character_number, UINT8 itx, UINT8 ity)
 {
         UBYTE tile_data;

        // Load tile into high tile set
        VBK_REG = 1;
        set_bkg_data(character_number, 1, &(windowtexttiles[(UINT16)character_number << 4]));
        VBK_REG = 0;

        // Set screen tile to loaded tile
        set_bkg_tiles(itx, ity, 1, 1, &(character_number));

        VBK_REG = 1;
        // Mark as using palette 1 and high bank of tiles
        tile_data = 0x9;
        set_bkg_tiles(itx, ity, 1, 1, &(tile_data));
        VBK_REG = 0;
 }

/*
 * show_window_text
 *
 * Show array of text onscreen and wait
 * for user to confirm
 */
void show_window_text(UINT8 *text)
{
    show_window_text_xy(0, 0, text);

    // Wait for original key press to be let go of
    delay(300);

    // Reset original key pressed
    joypad_state.a_pressed = 0;
    joypad_state.b_pressed = 0;

    // Wait for user to press A or B
    while (joypad_state.a_pressed == 0U && joypad_state.b_pressed == 0U)
    {
        wait_vbl_done();

        main_check_joy(ROM_BANK_WINDOW_TEXT);
    }
}

/*
 * show_window_text_xy
 *
 * Show array of text onscreen at given co-ordinates
 */
void show_window_text_xy(UINT8 itx_x, UINT8 itx_y, UINT8 *text)
{
    UINT8 text_index = 0;
    UINT16 character_number;

    while (1)
    {
        character_number = text[text_index];

        // Check if reached end of text
        if (character_number == WINDOW_TEXT_END)
        {
            break;
        }

        if (character_number != WINDOW_TEXT_SKIP)
            show_window_character(character_number, itx_x, itx_y);

        if (itx_x == (SCREEN_WIDTH_TILES - 1U))
        {
            itx_y += 1U;
            itx_x = 0U;
        }
        else
            itx_x += 1U;

        text_index += 1U;
    }

    // File up remainder of row with blank tiles
    while (itx_x != (SCREEN_WIDTH_TILES - 1U))
    {
        // Set screen tile to empty tile
        show_window_character(0U, itx_x, itx_y);
        itx_x += 1U;
    }
}