myelin/src/common/splash.c

#include <kernel/myelin.h>
#include <kernel/console.h>
#include <boot/splash.h>

/**
 * \brief   Call a splash_action_function
 */
static void splash_do(splash_action_function func, void* arg)
{
    func(arg);
}

/**
 * \brief   Draw the progress bar
 * \param num   Current action
 * \param count Number of actions
 * \param screen Screen information
 * \param text  Action message
 */
static void splash_paint(int num, int count, struct splash_screen screen,
                            const char* text)
{
    u32 i, j = screen.width - (count - num), k = screen.width;

    /*
     * Draw bar outline
     */
    console.screen.fore = screen.line;
    console.cursor.x = screen.x - 1;
    console.cursor.y = screen.y - 1;

    console_writechar(218);
    for (i = 0; i < k; ++i)
        console_writechar(196);
    console_writechar(191);
    console.cursor.x = screen.x - 1;
    console.cursor.y++;

    console_writechar(179);
    for (i = 0; i < k; ++i)
        console_writechar(' ');
    console_writechar(179);
    console.cursor.x = screen.x - 1;
    console.cursor.y++;

    console_writechar(192);
    for (i = 0; i < k; ++i)
        console_writechar(196);
    console_writechar(217);
    console.cursor.x = screen.x;
    console.cursor.y++;

    /*
     * Write message
     */
    console.screen.fore = screen.text;
    console_writestring(text);

    /*
     * Draw progress
     */
    console.screen.fore = screen.fill;
    console.cursor.x = screen.x;
    console.cursor.y = screen.y;
    for (i = 0; i < j; ++i)
        console_writechar(219);
    for (; j < k; ++j)
        console_writechar(' ');
}

/**
 * \brief   Draw a splash screen while booting the system
 * \param screen Splash screen info
 * \param actions Actions which need to be completed to boot the system
 * \param count Number of actions
 */
void splash(struct splash_screen screen, struct splash_action* actions,
                                u32 count)
{
    u8 saved_fore   = console.screen.fore;
    u8 saved_back   = console.screen.back;
    u32 saved_flags = console.cursor.flags;

    u32 i = 0;
    console.cursor.flags &= ~(CONSOLE_CURSOR_ENABLED);
    console.screen.back = screen.back;
    console_clear();

    if (!(screen.bar)) {
        console.cursor.x = console.cursor.y = 0;
        console.screen.fore = screen.text;
        console_writestring("MYELIN (booting)...\n\n");
    }

    while (i < count) {
        if (screen.bar) {
            console_clear();
            console.cursor.x = console.cursor.y = 0;
            console.screen.fore = screen.text;
            console_writestring("MYELIN (booting)...\n\n");
            splash_paint(i + 1, count, screen, actions[i].msg);
            splash_do(actions[i].func, actions[i].arg);
        } else {
            /*
             * Save y co-ord in case a callback function prints its
             * own text
             */
            unsigned y1 = console.cursor.y, y2;
            console.screen.fore = screen.text;
            console_writestring(actions[i].msg);

            console.cursor.x = 0;
            console.cursor.y++;
            splash_do(actions[i].func, actions[i].arg);

            console.cursor.x = console.screen.columns - 7;
            y2 = console.cursor.y;
            console.cursor.y = y1;

            console.screen.fore = screen.line;
            console_writestring("[");
            console.screen.fore = screen.fill;
            console_writestring("DONE");
            console.screen.fore = screen.line;
            console_writestring("]\n");
            console.cursor.x = 0;
            console.cursor.y = y2;
        }
        ++i;
    }

    console.screen.fore  = saved_fore;
    console.screen.back  = saved_back;
    console.cursor.flags = saved_flags;
}