Playdate DrawText using patterns

Playdate_DrawText_patterns

void drawTextColor(LCDBitmap* BitmapContext, LCDFont *font, const void* text, size_t len, PDStringEncoding encoding, int x, int y, LCDColor color, bool inverted)
{
	//grab width & height of our to be rendered text
	pd->graphics->pushContext(BitmapContext);
	int h = pd->graphics->getFontHeight(font);
	
	pd->graphics->setFont(font);
	int w = pd->graphics->getTextWidth(font, text, len, encoding, 0);
	
	//create new bitmap and fillrect with our color / pattern
	LCDBitmap *bitmap = pd->graphics->newBitmap(w, h, kColorClear);
	if (inverted)
		pd->graphics->setDrawMode(kDrawModeInverted);
	pd->graphics->pushContext(bitmap);
	pd->graphics->fillRect(0, 0, w, h, color);
	pd->graphics->popContext();
	
	//create mask with black background and draw text in white on the mask 
	LCDBitmap *bitmapmask = pd->graphics->newBitmap(w, h, kColorBlack);
	pd->graphics->pushContext(bitmapmask);
	pd->graphics->setDrawMode(kDrawModeFillWhite);
	pd->graphics->setFont(font);
	pd->graphics->drawText(text, len, encoding, 0, 0);
	pd->graphics->popContext();

	//set the mask to the bitmap with our pattern, this will make sure only the text
	//part (white in mask is drawn from the bitmap)
	pd->graphics->setBitmapMask(bitmap, bitmapmask);

	//now draw the bitmap containing our text to the x & y position
	pd->graphics->drawBitmap(bitmap, x, y, kBitmapUnflipped);
	pd->graphics->freeBitmap(bitmap);
	pd->graphics->freeBitmap(bitmapmask);
	pd->graphics->popContext();
}

LCDPattern grey50 = {
    // Bitmap
    0b10101010,
    0b01010101,
    0b10101010,
    0b01010101,
    0b10101010,
    0b01010101,
    0b10101010,
    0b01010101,

    // Mask
    0b11111111,
    0b11111111,
    0b11111111,
    0b11111111,
    0b11111111,
    0b11111111,
    0b11111111,
    0b11111111,
};


LCDPattern stripes = {
	// Bitmap
	0b11111111,
	0b00000000,
	0b11111111,
	0b00000000,
	0b11111111,
	0b00000000,
	0b11111111,
	0b00000000,

	// Mask
	0b11111111,
	0b11111111,
	0b11111111,
	0b11111111,
	0b11111111,
	0b11111111,
	0b11111111,
	0b11111111,
};


LCDPattern stripes2 = {
	// Bitmap
	0b00000000,
	0b11111111,
	0b11111111,
	0b00000000,
	0b11111111,
	0b00000000,
	0b11111111,
	0b11111111,

	// Mask
	0b11111111,
	0b11111111,
	0b11111111,
	0b11111111,
	0b11111111,
	0b11111111,
	0b11111111,
	0b11111111,
};

pd->graphics->clear(kColorWhite);

const char* text = "HELLO WORLD";
size_t len = strlen(text);

//draw text using a pattern that will look like grey on the playdate (handy for menu's or to show them greyed out instead of white on a black background or so)
drawTextColor(NULL, testfont, text, len, kASCIIEncoding, 100, 100, (LCDColor)grey50, false);

//draw using a solid color to the screen directly (= NULL first parameter)
drawTextColor(NULL, testfont, text, len, kASCIIEncoding, 100, 50, kColorBlack, false);

//some other parameters
drawTextColor(NULL, testfont, text, len, kASCIIEncoding, 100, 150, (LCDColor)stripes, false);
drawTextColor(NULL, testfont, text, len, kASCIIEncoding, 100, 200, (LCDColor)stripes2, false);

//white
pd->graphics->clear(kColorBlack);
drawTextColor(NULL, testfont, text, len, kASCIIEncoding, 100, 50, kColorWhite, false);
drawTextColor(NULL, testfont, text, len, kASCIIEncoding, 100, 100, (LCDColor)stripes2, false);
drawTextColor(NULL, testfont, text, len, kASCIIEncoding, 100, 200, (LCDColor)stripes2, true);