DigitalInfinity/ESP32-PaxCounter
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bugfix display vertical scrolling

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This commit is contained in:
Verkehrsrot 2019-10-13 17:21:50 +02:00
parent f35114f3a0
commit e94c73295b
1 changed files with 3 additions and 3 deletions
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6
src/display.cpp
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@ -418,7 +418,7 @@ int oledDrawPixel(uint8_t *buf, const uint16_t x, const uint16_t y,
void oledScrollBufferHorizontal(uint8_t *buf, const uint16_t width,
const uint16_t height, bool left) {
uint16_t col, page, idx;
uint16_t col, page, idx = 0;
for (page = 0; page < height / 8; page++) {
if (left) { // scroll left
@ -451,9 +451,9 @@ void oledScrollBufferVertical(uint8_t *buf, const uint16_t width,
buf_col = *(uint64_t *)&buf[col * DISPLAY_HEIGHT / 8];
if (offset > 0) // scroll down
buf_col <= abs(offset);
buf_col <<= offset;
else // scroll up
buf_col >= offset;
buf_col >>= abs(offset);
// write back uint64_t to uint8_t display buffer
*(uint64_t *)&buf[col * DISPLAY_HEIGHT / 8] = buf_col;