103 lines
2.3 KiB
D
103 lines
2.3 KiB
D
/**
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* HULK Console functionality.
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*/
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module hulk.console;
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import hulk.fb;
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import hulk.kfont;
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struct Console
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{
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/** Console width in text columns. */
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private static __gshared size_t m_width;
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/** Console height in text rows. */
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private static __gshared size_t m_height;
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/** Current console cursor X position. */
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private static __gshared size_t m_x;
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/** Current console cursor Y position. */
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private static __gshared size_t m_y;
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/**
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* Initialize the console.
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*/
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public static void initialize()
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{
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m_width = Fb.width / Kfont.advance;
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m_height = Fb.height / Kfont.line_height;
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}
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/**
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* Clear the console.
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*/
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public static void clear()
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{
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Fb.clear();
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m_x = 0u;
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m_y = 0u;
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}
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/**
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* Write a character to the console.
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*
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* @param ch Character to write.
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*/
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public static void write(char ch)
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{
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if (ch == '\n')
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{
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m_x = 0u;
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m_y++;
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}
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else
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{
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render_char(m_x, m_y, ch);
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m_x++;
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if (m_x == m_width)
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{
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m_x = 0u;
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m_y++;
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}
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}
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if (m_y == m_height)
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{
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m_y--;
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Fb.copy_rows_up(fb_y(m_height - 1u),
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(m_height - 1u) * Kfont.line_height,
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Kfont.line_height);
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Fb.rect(0u, fb_y(m_height - 1u), fb_x(m_width), Kfont.line_height, 0u);
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}
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}
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/**
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* Render a character.
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*
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* @param x X position.
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* @param y Y position.
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* @param ch Character to render.
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*/
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private static void render_char(size_t x, size_t y, char ch)
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{
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const(CharInfo) * ci = &Kfont.chars[ch];
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Fb.blit_alpha_bitmap(fb_x(x) + ci.left, fb_y(y) + ci.top - ci.height, ci.bitmap, ci.width, ci.height);
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}
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/**
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* Get the framebuffer X coordinate corresponding to the console X position.
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*/
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private static size_t fb_x(size_t x)
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{
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return x * Kfont.advance;
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}
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/**
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* Get the framebuffer Y coordinate corresponding to the console Y position.
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*/
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private static size_t fb_y(size_t y)
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{
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return Fb.height - ((y + 1u) * Kfont.line_height);
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}
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}
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