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@joyrider3774
Last active August 17, 2023 16:05
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Playdate DrawText using 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);
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