draw-line
wayland/sh1107-oled-i2c/draw-line
Draw a line. Data written to display buffer. To show content of display buffer on screen use node send-buffer-to-display.
draw-line
@/draw-line
Draw a line. Data written to display buffer. To show content of display buffer on screen use node send-buffer-to-display.
DEV@/sh1107-oled-i2c-device
An SH1107 OLED device.
X0number
Start point x coordinate.
Y0number
Start point y coordinate.
X1number
End point x coordinate.
Y1number
End point y coordinate.
COLOURnumber
Colour of line. Options:
0 = black;
1 = white;
2 = invert.
UPDpulse
Update. Trigger write to display buffer.
DONEpulse
Pulses on completion.
C++ implementation
#pragma XOD evaluate_on_pin disable
#pragma XOD evaluate_on_pin enable input_UPD
node {
void evaluate(Context ctx) {
if (!isInputDirty<input_UPD>(ctx))
return;
auto display = getValue<input_DEV>(ctx);
auto x0 = getValue<input_X0>(ctx);
auto y0 = getValue<input_Y0>(ctx);
auto x1 = getValue<input_X1>(ctx);
auto y1 = getValue<input_Y1>(ctx);
auto colour = getValue<input_COLOUR>(ctx);
display->drawLine(x0, y0, x1, y1, colour);
emitValue<output_DONE>(ctx, 1);
}
}