diff options
| author | David Crocker <dcrocker@eschertech.com> | 2021-04-22 18:31:27 +0300 |
|---|---|---|
| committer | David Crocker <dcrocker@eschertech.com> | 2021-04-22 18:31:27 +0300 |
| commit | 91546ca4ca413d38642850e56b4468c1b247bb24 (patch) | |
| tree | e50b20a9fb59ef617904d66b84a8580ee1f9aa61 /src/Display | |
| parent | 79a3243c22632c117f7ce4612002d6989ec99d1c (diff) | |
Avoid writing images beyond the last row of the display3.3beta3
Diffstat (limited to 'src/Display')
| -rw-r--r-- | src/Display/Lcd/Lcd.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/Display/Lcd/Lcd.cpp b/src/Display/Lcd/Lcd.cpp index a472d6e2..303a3bf5 100644 --- a/src/Display/Lcd/Lcd.cpp +++ b/src/Display/Lcd/Lcd.cpp @@ -525,7 +525,7 @@ void Lcd::Bitmap(PixelNumber x0, PixelNumber y0, PixelNumber width, PixelNumber // Draw a single bitmap row. 'left' and 'width' do not need to be divisible by 8. void Lcd::BitmapRow(PixelNumber top, PixelNumber left, PixelNumber width, const uint8_t data[], bool invert) noexcept { - if (width != 0) // avoid possible arithmetic underflow + if (width != 0 && top < numRows) // avoid possible arithmetic underflow or overflowing the buffer { const uint8_t inv = (invert) ? 0xFF : 0; uint8_t firstColIndex = left/8; // column index of the first byte to write |