draw-text
wayland/arduino-tvout/draw-text
Draw text.
draw-text
@/draw-text
Draw text.
DEV@/tvout-device
A tvout device.
TEXTstring
String to print. Use \n for new line.
FONTnumber
Font. Options:
0 = font4x6;
1 = font6x8;
2 = font8x8;
3 = font8x8ext.
Xnumber
The x coordinate of the cursor.
Ynumber
The y coordinate of the cursor.
XYboolean
Set cursor position. If true cursor will be moved to the coordinates specified by X and Y. If false text will be printed at current cursor position.
UPDpulse
Update. Triggers draw text.
DONEpulse
Pulse on completion.
C++ implementation
struct State {
};
{{ GENERATED_CODE }}
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 `TVout` class instance
auto tv = getValue<input_DEV>(ctx);
auto xString = getValue<input_TEXT>(ctx);
auto font = getValue<input_FONT>(ctx);
uint8_t x = getValue<input_X>(ctx);
uint8_t y = getValue<input_Y>(ctx);
auto xy = getValue<input_XY>(ctx);
int N=length(xString) + 1;
char cString[N];
for(int i=0;i<N;i++)
cString[i]=0;
// move the data from XString to the plain C string
dump(xString, cString);
if (font==0) {
tv->select_font(font4x6);
}
else if(font==1) {
tv->select_font(font6x8);
}
else if(font==2) {
tv->select_font(font8x8);
}
else if(font==3) {
tv->select_font(font8x8ext);
}
else {
raiseError(ctx);
return;
}
if (xy) {
tv->println(x, y, cString);
} else {
tv->println(cString);
}
emitValue<output_DONE>(ctx, 1);
}