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Make graphical background a frame around a centered terminal box

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mintsuki 2020-09-22 00:45:26 +02:00
parent 7aa9d845e7
commit ed5c214c5e
2 changed files with 20 additions and 8 deletions
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stage2/drivers/vbe.c
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@ -34,6 +34,8 @@ static uint16_t vbe_width = 0;
static uint16_t vbe_height = 0;
static uint16_t vbe_bpp = 0;
static int frame_height, frame_width;
static struct image *background;
void vbe_plot_px(int x, int y, uint32_t hex) {
@ -54,9 +56,7 @@ void vbe_plot_char(struct vbe_char c, int x, int y) {
for (int i = 0; i < VGA_FONT_HEIGHT; i++) {
for (int j = VGA_FONT_WIDTH - 1; j >= 0; j--) {
uint32_t bg_pixel = background == NULL ? c.bg :
background->get_pixel(background, x, y);
vbe_plot_px(x++, y, (glyph[i] & (1 << j)) ? c.fg : bg_pixel);
vbe_plot_px(x++, y, (glyph[i] & (1 << j)) ? c.fg : c.bg);
}
y++;
x = orig_x;
@ -79,14 +79,16 @@ static int rows;
static int cols;
static void plot_char_grid(struct vbe_char c, int x, int y) {
vbe_plot_char(c, x * VGA_FONT_WIDTH, y * VGA_FONT_HEIGHT);
vbe_plot_char(c, x * VGA_FONT_WIDTH + frame_width,
y * VGA_FONT_HEIGHT + frame_height);
grid[x + y * cols] = c;
}
static void clear_cursor(void) {
if (cursor_status) {
vbe_plot_char(grid[cursor_x + cursor_y * cols],
cursor_x * VGA_FONT_WIDTH, cursor_y * VGA_FONT_HEIGHT);
cursor_x * VGA_FONT_WIDTH + frame_width,
cursor_y * VGA_FONT_HEIGHT + frame_height);
}
}
@ -95,7 +97,8 @@ static void draw_cursor(void) {
c.fg = cursor_fg;
c.bg = cursor_bg;
if (cursor_status)
vbe_plot_char(c, cursor_x * VGA_FONT_WIDTH, cursor_y * VGA_FONT_HEIGHT);
vbe_plot_char(c, cursor_x * VGA_FONT_WIDTH + frame_width,
cursor_y * VGA_FONT_HEIGHT + frame_height);
}
static void scroll(void) {
@ -120,6 +123,11 @@ static void scroll(void) {
void vbe_clear(bool move) {
clear_cursor();
if (background != NULL)
for (int x = 0; x < vbe_width; x++)
for (int y = 0; y < vbe_height; y++)
vbe_plot_px(x, y, background->get_pixel(background, x, y));
struct vbe_char empty;
empty.c = ' ';
empty.fg = text_fg;
@ -226,10 +234,14 @@ void vbe_putchar(char c) {
void vbe_tty_init(int *_rows, int *_cols, struct image *_background) {
init_vbe(&vbe_framebuffer, &vbe_pitch, &vbe_width, &vbe_height, &vbe_bpp);
vga_font_retrieve();
*_cols = cols = vbe_width / VGA_FONT_WIDTH;
*_rows = rows = vbe_height / VGA_FONT_HEIGHT;
*_cols = cols = 80;
*_rows = rows = 25;
grid = ext_mem_alloc(rows * cols * sizeof(struct vbe_char));
background = _background;
frame_height = vbe_height / 2 - (VGA_FONT_HEIGHT * rows) / 2;
frame_width = vbe_width / 2 - (VGA_FONT_WIDTH * cols) / 2;
vbe_clear(true);
}