draw-line(wt-lcd-device)
wayland/wio-terminal-lcd/draw-line(wt-lcd-device)
Draw a line.
draw-line(wt-lcd-device)
@/draw-line(wt-lcd-device)
Draw a line.
DEV@/wt-lcd-device
An LCD device.
X0number
X coordinate of the start of the line.
Y0number
Y coordinate of the start of the line.
X1number
X coordinate of the end of the line.
Y1number
Y coordinate of the end of the line.
Colorxod/color/color
Line color.
UPDpulse
Update.
Donepulse
Pulse on completion.
C++ implementation
#pragma XOD evaluate_on_pin disable
#pragma XOD evaluate_on_pin enable input_UPD
node {
void evaluate(Context ctx) {
// The node responds only if there is an input pulse
if (!isInputDirty<input_UPD>(ctx))
return;
// Get a pointer to the `TFT_eSPI tft` class instance
auto tft = getValue<input_DEV>(ctx);
XColor color24 = getValue<input_Color>(ctx);
uint16_t color16 = ((color24.r & 0xF8) << 8) | ((color24.g & 0xFC) << 3) | (color24.b >> 3);
tft -> drawLine(getValue<input_X0>(ctx),
getValue<input_Y0>(ctx),
getValue<input_X1>(ctx),
getValue<input_Y1>(ctx),
color16);
emitValue<output_Done>(ctx, 1);
}
}