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feat: add turnOffScreen parameter for sunlight fading fix

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Add optional turnOffScreen parameter to displayBuffer() and displayWindow()
to allow turning off the screen after refresh, mitigating sunlight fading issues.
This commit is contained in:
cottongin 2026-01-30 23:02:20 -05:00
parent dede09001c
commit be6ba1b62b
No known key found for this signature in database
GPG Key ID: 0ECC91FE4655C262
2 changed files with 7 additions and 7 deletions
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4
libs/display/EInkDisplay/include/EInkDisplay.h
View File

@ -42,9 +42,9 @@ class EInkDisplay {
void cleanupGrayscaleBuffers(const uint8_t* bwBuffer);
#endif
void displayBuffer(RefreshMode mode = FAST_REFRESH);
void displayBuffer(RefreshMode mode = FAST_REFRESH, bool turnOffScreen = false);
// EXPERIMENTAL: Windowed update - display only a rectangular region
void displayWindow(uint16_t x, uint16_t y, uint16_t w, uint16_t h);
void displayWindow(uint16_t x, uint16_t y, uint16_t w, uint16_t h, bool turnOffScreen = false);
void displayGrayBuffer(bool turnOffScreen = false);
void refreshDisplay(RefreshMode mode = FAST_REFRESH, bool turnOffScreen = false);

10
libs/display/EInkDisplay/src/EInkDisplay.cpp
View File

@ -418,8 +418,8 @@ void EInkDisplay::cleanupGrayscaleBuffers(const uint8_t* bwBuffer) {
}
#endif
void EInkDisplay::displayBuffer(RefreshMode mode) {
if (!isScreenOn) {
void EInkDisplay::displayBuffer(RefreshMode mode, const bool turnOffScreen) {
if (!isScreenOn && !turnOffScreen) {
// Force half refresh if screen is off
mode = HALF_REFRESH;
}
@ -451,7 +451,7 @@ void EInkDisplay::displayBuffer(RefreshMode mode) {
#endif
// Refresh the display
refreshDisplay(mode);
refreshDisplay(mode, turnOffScreen);
#ifdef EINK_DISPLAY_SINGLE_BUFFER_MODE
// In single buffer mode always sync RED RAM after refresh to prepare for next fast refresh
@ -464,7 +464,7 @@ void EInkDisplay::displayBuffer(RefreshMode mode) {
// EXPERIMENTAL: Windowed update support
// Displays only a rectangular region of the frame buffer, preserving the rest of the screen.
// Requirements: x and w must be byte-aligned (multiples of 8 pixels)
void EInkDisplay::displayWindow(uint16_t x, uint16_t y, uint16_t w, uint16_t h) {
void EInkDisplay::displayWindow(uint16_t x, uint16_t y, uint16_t w, uint16_t h, const bool turnOffScreen) {
Serial.printf("[%lu] Displaying window at (%d,%d) size (%dx%d)\n", millis(), x, y, w, h);
// Validate bounds
@ -525,7 +525,7 @@ void EInkDisplay::displayWindow(uint16_t x, uint16_t y, uint16_t w, uint16_t h)
#endif
// Perform fast refresh
refreshDisplay(FAST_REFRESH);
refreshDisplay(FAST_REFRESH, turnOffScreen);
#ifdef EINK_DISPLAY_SINGLE_BUFFER_MODE
// Post-refresh: Sync RED RAM with current window (for next fast refresh)