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Implement "Flip screen" setting for E-Ink displays (#3871)
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@ -62,12 +62,19 @@ bool EInkDisplay::forceDisplay(uint32_t msecLimit)
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return false;
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// FIXME - only draw bits have changed (use backbuf similar to the other displays)
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const bool flipped = config.display.flip_screen;
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for (uint32_t y = 0; y < displayHeight; y++) {
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for (uint32_t x = 0; x < displayWidth; x++) {
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// get src pixel in the page based ordering the OLED lib uses FIXME, super inefficient
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auto b = buffer[x + (y / 8) * displayWidth];
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auto isset = b & (1 << (y & 7));
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adafruitDisplay->drawPixel(x, y, isset ? GxEPD_BLACK : GxEPD_WHITE);
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// Handle flip here, rather than with setRotation(),
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// Avoids issues when display width is not a multiple of 8
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if (flipped)
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adafruitDisplay->drawPixel((displayWidth - 1) - x, (displayHeight - 1) - y, isset ? GxEPD_BLACK : GxEPD_WHITE);
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else
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adafruitDisplay->drawPixel(x, y, isset ? GxEPD_BLACK : GxEPD_WHITE);
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}
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}
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