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docs(eink): name the GxEPD2 version GxEPD2_FastWrite.h copies from

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setRamArea() and fastWrite() follow GxEPD2 1.6.2's private
_setPartialRamArea() and _writeImage() for the GDEQ0426T82; say so, so
whoever bumps the library knows to re-check them.
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pmow
2026-10-10 16:14:18 -10:00
parent da5ff56cff
commit beae8de734
1 changed files with 3 additions and 1 deletions
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src/helpers/ui/GxEPD2_FastWrite.h
+3 -1
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@@ -31,6 +31,8 @@ class GxEPD2_426_GDEQ0426T82_Fast : public GxEPD2_426_GDEQ0426T82 {
// Same RAM window as the stock driver's (private) _setPartialRamArea():
// the gates are reversed on this panel, so y is mirrored and entered decreasing.
// Copied from GxEPD2 1.6.2 (src/gdeq/GxEPD2_426_GDEQ0426T82.cpp) -- when
// bumping GxEPD2, check the library's version still matches this one.
void setRamArea(uint16_t x, uint16_t y, uint16_t w, uint16_t h) {
y = HEIGHT - y - h;
_writeCommand(0x11);
@@ -54,7 +56,7 @@ class GxEPD2_426_GDEQ0426T82_Fast : public GxEPD2_426_GDEQ0426T82 {
}
// The stock _writeImage(), with the per-byte loop replaced by one bulk
// transfer per row (clipping and indexing unchanged).
// transfer per row (clipping and indexing unchanged). Also from GxEPD2 1.6.2.
void fastWrite(uint8_t command, const uint8_t bitmap[], int16_t x, int16_t y, int16_t w, int16_t h, bool invert) {
delay(1); // as the stock driver: yield
int16_t wb = (w + 7) / 8;