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| author | Jonathan Rascher <jon@bcat.name> | 2021-06-16 00:30:37 -0500 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2021-06-15 22:30:37 -0700 |
| commit | 83ee79565ce81c3e8dd097be1fe46dc522e17544 (patch) | |
| tree | f5abd7a3eaf62aa0f139647981b3ac013b39628a /drivers/oled | |
| parent | 5c3991cb90108115a269e0b9f7e4b71019851cc1 (diff) | |
| download | qmk_firmware-83ee79565ce81c3e8dd097be1fe46dc522e17544.tar.gz qmk_firmware-83ee79565ce81c3e8dd097be1fe46dc522e17544.zip | |
Fix overrun in oled_write_raw when not at (0, 0) (#13204)
Diffstat (limited to 'drivers/oled')
| -rw-r--r-- | drivers/oled/oled_driver.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/oled/oled_driver.c b/drivers/oled/oled_driver.c index 082115d53..53bdc196d 100644 --- a/drivers/oled/oled_driver.c +++ b/drivers/oled/oled_driver.c | |||
| @@ -491,8 +491,9 @@ void oled_write_raw(const char *data, uint16_t size) { | |||
| 491 | uint16_t cursor_start_index = oled_cursor - &oled_buffer[0]; | 491 | uint16_t cursor_start_index = oled_cursor - &oled_buffer[0]; |
| 492 | if ((size + cursor_start_index) > OLED_MATRIX_SIZE) size = OLED_MATRIX_SIZE - cursor_start_index; | 492 | if ((size + cursor_start_index) > OLED_MATRIX_SIZE) size = OLED_MATRIX_SIZE - cursor_start_index; |
| 493 | for (uint16_t i = cursor_start_index; i < cursor_start_index + size; i++) { | 493 | for (uint16_t i = cursor_start_index; i < cursor_start_index + size; i++) { |
| 494 | if (oled_buffer[i] == data[i]) continue; | 494 | uint8_t c = *data++; |
| 495 | oled_buffer[i] = data[i]; | 495 | if (oled_buffer[i] == c) continue; |
| 496 | oled_buffer[i] = c; | ||
| 496 | oled_dirty |= ((OLED_BLOCK_TYPE)1 << (i / OLED_BLOCK_SIZE)); | 497 | oled_dirty |= ((OLED_BLOCK_TYPE)1 << (i / OLED_BLOCK_SIZE)); |
| 497 | } | 498 | } |
| 498 | } | 499 | } |