diff options
Diffstat (limited to 'src/kernel/graphics')
| -rw-r--r-- | src/kernel/graphics/vesa.c | 29 |
1 files changed, 27 insertions, 2 deletions
diff --git a/src/kernel/graphics/vesa.c b/src/kernel/graphics/vesa.c index f72f4ab..24f3311 100644 --- a/src/kernel/graphics/vesa.c +++ b/src/kernel/graphics/vesa.c @@ -341,11 +341,36 @@ void vesa_draw_number(int n) { vesa_draw_string(itoa(n, string)); } +char *prev = 0; +int prev_coords[2] = {}; + void vesa_draw_cursor(int x, int y) { - int pos = x * vbe_bpl + y * vbe_pitch; - char *draw = (char *) &fb[pos]; + // Reset previous area + char *reset = (char *) &fb[prev_coords[0] * vbe_bpl + prev_coords[1] * vbe_pitch]; + if (prev != 0) { + for (int cy = 0; cy <= 19; cy++) { + for (int cx = 0; cx <= 12 + 1; cx++) { + reset[vbe_bpl * cx] = prev[vbe_bpl * cx]; + reset[vbe_bpl * cx + 1] = prev[vbe_bpl * cx + 1]; + reset[vbe_bpl * cx + 2] = prev[vbe_bpl * cx + 2]; + } + reset += vbe_pitch; + } + kfree(prev); + } + + prev = kmalloc(19 * 12 * vbe_bpl); + + // Draw cursor + char *draw = (char *) &fb[x * vbe_bpl + y * vbe_pitch]; + prev_coords[0] = x; + prev_coords[1] = y; for (int cy = 0; cy <= 19; cy++) { for (int cx = 0; cx <= 12 + 1; cx++) { + // Performance issue? + prev[vbe_bpl * cx] = draw[vbe_bpl * cx]; + prev[vbe_bpl * cx + 1] = draw[vbe_bpl * cx + 1]; + prev[vbe_bpl * cx + 2] = draw[vbe_bpl * cx + 2]; if (cursor[cy] & ((1 << 12) >> cx)) { draw[vbe_bpl * cx] = terminal_color[2]; draw[vbe_bpl * cx + 1] = terminal_color[1]; |