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Shift lines up instead of clearing the screen when full

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Philipp Oppermann
2020-09-09 19:00:51 +02:00
parent 4d2f18d481
commit dee04d74d6
1 changed files with 8 additions and 2 deletions
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10
src/framebuffer.rs
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@@ -45,6 +45,12 @@ impl Writer {
self.buffer.fill(0); self.buffer.fill(0);
} }
fn shift_lines_up(&mut self) {
let offset = self.info.stride * self.info.bytes_per_pixel * 8;
self.buffer.copy_within(offset.., 0);
self.y_pos -= 8;
}
fn width(&self) -> usize { fn width(&self) -> usize {
self.info.horizontal_resolution self.info.horizontal_resolution
} }
@@ -61,8 +67,8 @@ impl Writer {
if self.x_pos >= self.width() { if self.x_pos >= self.width() {
self.newline(); self.newline();
} }
if self.y_pos >= (self.height() - 8) { while self.y_pos >= (self.height() - 8) {
self.clear(); self.shift_lines_up();
} }
let rendered = font8x8::BASIC_FONTS let rendered = font8x8::BASIC_FONTS
.get(c) .get(c)