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| author | Galen Sagarin <gps5307@rit.edu> | 2025-05-06 15:05:22 -0400 |
|---|---|---|
| committer | Galen Sagarin <gps5307@rit.edu> | 2025-05-06 15:05:22 -0400 |
| commit | e4324f180c31ebf06206be6dff5f3863d6ec2675 (patch) | |
| tree | 73f197fe28c8cc9efdb113b9702790d0085caaff /kernel/term.c | |
| parent | tar.c documentation (diff) | |
| parent | start docs (diff) | |
| download | comus-e4324f180c31ebf06206be6dff5f3863d6ec2675.tar.gz comus-e4324f180c31ebf06206be6dff5f3863d6ec2675.tar.bz2 comus-e4324f180c31ebf06206be6dff5f3863d6ec2675.zip | |
Merge branch 'main' of https://github.com/kenshineto/kern
Should have fixed
Diffstat (limited to 'kernel/term.c')
| -rw-r--r-- | kernel/term.c | 26 |
1 files changed, 23 insertions, 3 deletions
diff --git a/kernel/term.c b/kernel/term.c index 917f645..88fa072 100644 --- a/kernel/term.c +++ b/kernel/term.c @@ -7,8 +7,10 @@ // terminal data static char buffer[TERM_MAX_WIDTH * TERM_MAX_HEIGHT]; static uint16_t buffer_line = UINT16_MAX; -static uint16_t width = 80; // baseline vga text mode until resized -static uint16_t height = 25; +static uint16_t last_width = 80, + width = 80; // baseline vga text mode until resized +static uint16_t last_height = 25, height = 25; +static uint16_t scrolling = 0; static uint16_t x = 0; static uint16_t y = 0; @@ -140,10 +142,26 @@ void term_redraw(void) for (uint16_t j = 0; j < height; j++) { for (uint16_t i = 0; i < width; i++) { - char c = buffer[BUFIDX(i, j)]; + char c; + + c = buffer[BUFIDX(i, j)]; + + // if screen hasnet changed size + // dont redraw what we dont need to redraw + if (last_width == height && last_width == width) { + char prev; + prev = buffer[BUFIDX(i, (j - scrolling))]; + if (c == prev) + continue; + } + gpu_draw_char(c, i, j); } } + + last_width = width; + last_height = height; + scrolling = 0; } void term_scroll(uint16_t lines) @@ -151,6 +169,8 @@ void term_scroll(uint16_t lines) if (!lines) return; buffer_line += lines; + term_clear_line(y); + scrolling = lines; term_redraw(); } |