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Faster char write #446

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Faster char write #446

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caff87e
Update Adafruit_GFX.h
nathanjshaffer Dec 30, 2023
ccdbcbf
Update Adafruit_GFX.cpp
nathanjshaffer Jan 6, 2024
4e3a95f
Update Adafruit_GFX.cpp
nathanjshaffer Jan 14, 2024
1085844
more variables
nathanjshaffer Jan 14, 2024
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34 changes: 24 additions & 10 deletions Adafruit_GFX.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1147,20 +1147,34 @@ void Adafruit_GFX::drawChar(int16_t x, int16_t y, unsigned char c,
c++; // Handle 'classic' charset behavior

startWrite();
for (int8_t i = 0; i < 5; i++) { // Char bitmap = 5 columns
int8_t rp, rb; // Count sequential FG and BG pixels in column
for (int8_t i = 0; i < 5; i++, rp = 0, rb = 0) { // Char bitmap = 5 columns
uint8_t line = pgm_read_byte(&font[c * 5 + i]);
for (int8_t j = 0; j < 8; j++, line >>= 1) {
if (line & 1) {
if (size_x == 1 && size_y == 1)
writePixel(x + i, y + j, color);
else
writeFillRect(x + i * size_x, y + j * size_y, size_x, size_y,
color);
rp++;
if (!(1 & (line >> 1)) ||
j == 7) { // write sequential pixels with writeFillRect
if (rp == 1 && size_x == 1 && size_y == 1) {
writePixel(x + i, y + j, color);
} else if (rp > 0) {
writeFillRect(x + i * size_x, y + (j - (rp - 1)) * size_y, size_x,
size_y * rp, color);
}
rp = 0;
}
} else if (bg != color) {
if (size_x == 1 && size_y == 1)
writePixel(x + i, y + j, bg);
else
writeFillRect(x + i * size_x, y + j * size_y, size_x, size_y, bg);
rb++;
if (1 & (line >> 1) ||
j == 7) { // write sequential pixels with writeFillRect
if (rb == 1 && size_x == 1 && size_y == 1) {
writePixel(x + i, y + j, bg);
} else if (rb > 0) {
writeFillRect(x + i * size_x, y + (j - (rb - 1)) * size_y, size_x,
size_y * rb, bg);
}
rb = 0;
}
}
}
}
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25 changes: 15 additions & 10 deletions Adafruit_GFX.h
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Expand Up @@ -294,16 +294,21 @@ class Adafruit_GFX_Button {
/**********************************************************************/
bool isPressed(void) { return currstate; };

private:
Adafruit_GFX *_gfx;
int16_t _x1, _y1; // Coordinates of top-left corner
uint16_t _w, _h;
uint8_t _textsize_x;
uint8_t _textsize_y;
uint16_t _outlinecolor, _fillcolor, _textcolor;
char _label[10];

bool currstate, laststate;
protected:
Adafruit_GFX *_gfx; ///< gfx display pointer
int16_t _x1; ///< x Coordinate of top-left corner
int16_t _y1; ///< y Coordinate of top-left corner
uint16_t _w; ///< width of button
uint16_t _h; ///< height of button
uint8_t _textsize_x; ///< width of text character in pixels
uint8_t _textsize_y; ///< height of text character in pixels
uint16_t _outlinecolor; ///< button outline color
uint16_t _fillcolor; ///< button fill color
uint16_t _textcolor; ///< text color
char _label[10]; ///< text label on button

bool currstate; ///< current pressed state
bool laststate; ///< previous pressed state
};

/// A GFX 1-bit canvas context for graphics
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