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Implement "Flip screen" setting for E-Ink displays (#3871)

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todd-herbert 2024-05-13 23:42:41 +12:00 committed by GitHub
parent 078f33ff78
commit a9a208de73
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1 changed files with 8 additions and 1 deletions
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src/graphics/EInkDisplay2.cpp
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@ -62,11 +62,18 @@ bool EInkDisplay::forceDisplay(uint32_t msecLimit)
return false; return false;
// FIXME - only draw bits have changed (use backbuf similar to the other displays) // FIXME - only draw bits have changed (use backbuf similar to the other displays)
const bool flipped = config.display.flip_screen;
for (uint32_t y = 0; y < displayHeight; y++) { for (uint32_t y = 0; y < displayHeight; y++) {
for (uint32_t x = 0; x < displayWidth; x++) { for (uint32_t x = 0; x < displayWidth; x++) {
// get src pixel in the page based ordering the OLED lib uses FIXME, super inefficient // get src pixel in the page based ordering the OLED lib uses FIXME, super inefficient
auto b = buffer[x + (y / 8) * displayWidth]; auto b = buffer[x + (y / 8) * displayWidth];
auto isset = b & (1 << (y & 7)); auto isset = b & (1 << (y & 7));
// Handle flip here, rather than with setRotation(),
// Avoids issues when display width is not a multiple of 8
if (flipped)
adafruitDisplay->drawPixel((displayWidth - 1) - x, (displayHeight - 1) - y, isset ? GxEPD_BLACK : GxEPD_WHITE);
else
adafruitDisplay->drawPixel(x, y, isset ? GxEPD_BLACK : GxEPD_WHITE); adafruitDisplay->drawPixel(x, y, isset ? GxEPD_BLACK : GxEPD_WHITE);
} }
} }