void DMDFrame::drawString(int x, int y, const String &str, DMDGraphicsMode mode, const uint8_t *font)
{
if(!font)
font = this->font;
if (x >= (int)pixel_width() || y >= (int)pixel_height())
return;
_drawString(this, x, y, str, mode, font);
}
void DMDFrame::drawString(int x, int y, const char *bChars, bool inverse, const uint8_t *font)
{
if(!font)
font = this->font;
if (x >= (int)pixel_width() || y >= (int)pixel_height())
return;
_drawString(this, x, y, bChars, inverse, font);
}
void DMDFrame::drawString_P(int x, int y, const char *flashStr, DMDGraphicsMode mode, const uint8_t *font)
{
if(!font)
font = this->font;
if(x >= (int)pixel_width() || y >= (int)pixel_height())
return;
_FlashStringWrapper wrapper(flashStr);
_drawString(this, x, y, wrapper, mode, font);
}
int DMDFrame::drawChar(const int x, const int y, const char letter, DMDGraphicsMode mode, const uint8_t *font)
{
if(!font)
font = this->font;
if(x >= (int)pixel_width() || y >= (int)pixel_height())
return -1;
struct FontHeader header;
memcpy_P(&header, (void*)font, sizeof(FontHeader));
char c = letter;
if (c == ' ') {
int charWide = charWidth(' ');
this->drawFilledBox(x, y, x + charWide, y + header.height, mode);
return charWide;
}
uint8_t width = 0;
uint8_t bytes = (header.height + 7) / 8;
uint16_t index = 0;
if (c < header.firstChar || c >= (header.firstChar + header.charCount))
return 0;
c -= header.firstChar;
if (header.size == 0) {
// zero length is flag indicating fixed width font (array does not contain width data entries)
width = header.fixedWidth;
index = sizeof(FontHeader) + c * bytes * width;
} else {
// variable width font, read width data, to get the index
for (uint8_t i = 0; i < c; i++) {
index += pgm_read_byte(font + sizeof(FontHeader) + i);
}
index = index * bytes + header.charCount + sizeof(FontHeader);
width = pgm_read_byte(font + sizeof(FontHeader) + c);
}
if (x < -width || y < -header.height)
return width;
bool inverse = false;
if (mode == GRAPHICS_INVERSE) {
inverse = true;
}
// last but not least, draw the character
for (uint8_t j = 0; j < width; j++) { // Width
for (uint8_t i = bytes - 1; i < 254; i--) { // Vertical Bytes
uint8_t data = pgm_read_byte(font + index + j + (i * width));
int offset = (i * 8);
if ((i == bytes - 1) && bytes > 1) {
offset = header.height - 8;
}
for (uint8_t k = 0; k < 8; k++) { // Vertical bits
if ((offset+k >= i*8) && (offset+k <= header.height)) {
if (data & (1 << k)) {
if(inverse) {
setPixel(x + j, y + offset + k, GRAPHICS_OFF);
} else {
setPixel(x + j, y + offset + k, GRAPHICS_NORMAL);
}
} else {
if(inverse) {
setPixel(x + j, y + offset + k, GRAPHICS_NORMAL);
} else {
setPixel(x + j, y + offset + k, GRAPHICS_OFF);
}
}
}
}
}
}
return width;
}
