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feat: dynamic font-adaptive layout and Lemon font icon support for SH1106

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- Add getCharWidth()/getLineHeight() virtual methods to DisplayDriver so
  all layout math adapts to whatever font is active
- Fix Lemon font baseline offset from +8 to +6 (cap height, not FONT_ASCENT)
- Add LemonIcons.h with Private Use Area glyph table; U+E03B mute icon
  rendered via drawLemonChar icon lookup
- FullscreenMsgView: compute wrap width and visible lines dynamically from
  display font metrics instead of hardcoded constants
- SettingsScreen and MessagesScreen: replace hardcoded ITEM_H/VISIBLE with
  members computed at render() time from getLineHeight()

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Jakub
2026-05-16 13:27:34 +02:00
parent b8ac4245cf
commit 24c8dcad72
6 changed files with 131 additions and 77 deletions
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44
examples/companion_radio/ui-new/FullscreenMsgView.h
View File

@@ -3,10 +3,8 @@
#include <helpers/ui/DisplayDriver.h>
#include <Arduino.h>
static const int FS_CHARS = 21;
static const int FS_LINE_H = 9;
static const int FS_START_Y = 12;
static const int FS_VISIBLE = (64 - FS_START_Y) / FS_LINE_H;
static const int FS_CHARS_MAX = 32; // max buffer per line (larger than any font needs)
static const int FS_START_Y = 12; // header height (fixed, not font-dependent)
struct FullscreenMsgView {
int scroll;
@@ -18,22 +16,23 @@ struct FullscreenMsgView {
void begin() { scroll = 0; active = true; }
static int wrapLines(const char* text, char out[][FS_CHARS + 1], int max_lines) {
static int wrapLines(const char* text, int chars, char out[][FS_CHARS_MAX], int max_lines) {
int count = 0;
const char* p = text;
while (*p && count < max_lines) {
int len = strlen(p);
if (len <= FS_CHARS) {
strncpy(out[count++], p, FS_CHARS);
out[count - 1][len] = '\0';
if (len <= chars) {
strncpy(out[count++], p, FS_CHARS_MAX - 1);
out[count - 1][len < FS_CHARS_MAX ? len : FS_CHARS_MAX - 1] = '\0';
break;
}
int brk = FS_CHARS;
for (int i = FS_CHARS - 1; i > 0; i--) {
int brk = chars;
for (int i = chars - 1; i > 0; i--) {
if (p[i] == ' ') { brk = i; break; }
}
strncpy(out[count], p, brk);
out[count++][brk] = '\0';
int copy = brk < FS_CHARS_MAX - 1 ? brk : FS_CHARS_MAX - 1;
strncpy(out[count], p, copy);
out[count++][copy] = '\0';
p += brk + (p[brk] == ' ' ? 1 : 0);
}
return count;
@@ -42,19 +41,23 @@ struct FullscreenMsgView {
int render(DisplayDriver& display, const char* sender, const char* text,
bool has_prev, bool has_next) {
display.setTextSize(1);
const int lineH = display.getLineHeight();
const int chars = (display.width() - 6) / display.getCharWidth();
const int visible = (display.height() - FS_START_Y - lineH) / lineH;
display.setColor(DisplayDriver::LIGHT);
display.fillRect(0, 0, display.width(), 10);
display.setColor(DisplayDriver::DARK);
display.drawTextEllipsized(2, 1, display.width() - 4, sender);
display.setColor(DisplayDriver::LIGHT);
char lines[12][FS_CHARS + 1];
int lcount = wrapLines(text, lines, 12);
int max_scroll = lcount > FS_VISIBLE ? lcount - FS_VISIBLE : 0;
char lines[12][FS_CHARS_MAX];
int lcount = wrapLines(text, chars, lines, 12);
int max_scroll = lcount > visible ? lcount - visible : 0;
if (scroll > max_scroll) scroll = max_scroll;
for (int i = 0; i < FS_VISIBLE && (scroll + i) < lcount; i++) {
display.setCursor(0, FS_START_Y + i * FS_LINE_H);
for (int i = 0; i < visible && (scroll + i) < lcount; i++) {
display.setCursor(0, FS_START_Y + i * lineH);
display.print(lines[scroll + i]);
}
if (scroll > 0) {
@@ -62,15 +65,16 @@ struct FullscreenMsgView {
display.print("^");
}
if (scroll < max_scroll) {
display.setCursor(display.width() - 6, FS_START_Y + (FS_VISIBLE - 1) * FS_LINE_H);
display.setCursor(display.width() - 6, FS_START_Y + (visible - 1) * lineH);
display.print("v");
}
const int nav_y = display.height() - lineH;
if (has_next) {
display.setCursor(0, 56);
display.setCursor(0, nav_y);
display.print("<");
}
if (has_prev) {
display.setCursor(display.width() - 6, 56);
display.setCursor(display.width() - 6, nav_y);
display.print(">");
}
return 300;

117
examples/companion_radio/ui-new/UITask.cpp
View File

@@ -165,11 +165,10 @@ class SettingsScreen : public UIScreen {
Count
};
static const int VISIBLE_ITEMS = 4;
static const int ITEM_H = 11;
static const int START_Y = 12;
static const int VAL_X = 80;
int _visible_items, _item_h;
int _selected;
int _scroll;
bool _dirty;
@@ -338,7 +337,7 @@ class SettingsScreen : public UIScreen {
if (sel) {
display.setColor(DisplayDriver::LIGHT);
display.fillRect(0, y - 1, display.width(), ITEM_H);
display.fillRect(0, y - 1, display.width(), _item_h);
display.setColor(DisplayDriver::DARK);
} else {
display.setColor(DisplayDriver::LIGHT);
@@ -446,13 +445,15 @@ class SettingsScreen : public UIScreen {
public:
SettingsScreen(UITask* task)
: _task(task), _selected(BRIGHTNESS), _scroll(0), _dirty(false), _edit_slot(-1) {}
: _task(task), _visible_items(4), _item_h(11), _selected(BRIGHTNESS), _scroll(0), _dirty(false), _edit_slot(-1) {}
void markClean() { _dirty = false; }
int render(DisplayDriver& display) override {
display.setTextSize(1);
_item_h = display.getLineHeight() + 3;
_visible_items = (display.height() - START_Y) / _item_h;
if (_edit_slot >= 0) {
return _kb.render(display);
@@ -462,8 +463,8 @@ public:
display.drawTextCentered(display.width() / 2, 0, "SETTINGS");
display.fillRect(0, 10, display.width(), 1);
for (int i = 0; i < VISIBLE_ITEMS && (_scroll + i) < SettingItem::Count; i++) {
renderItem(display, _scroll + i, START_Y + i * ITEM_H);
for (int i = 0; i < _visible_items && (_scroll + i) < SettingItem::Count; i++) {
renderItem(display, _scroll + i, START_Y + i * _item_h);
}
// scroll indicators
@@ -472,9 +473,9 @@ public:
display.setCursor(display.width() - 6, START_Y);
display.print("^");
}
if (_scroll + VISIBLE_ITEMS < SettingItem::Count) {
if (_scroll + _visible_items < SettingItem::Count) {
display.setColor(DisplayDriver::LIGHT);
display.setCursor(display.width() - 6, START_Y + (VISIBLE_ITEMS - 1) * ITEM_H);
display.setCursor(display.width() - 6, START_Y + (_visible_items - 1) * _item_h);
display.print("v");
}
@@ -512,7 +513,7 @@ public:
int next = nextSelectable(_selected);
if (next != _selected) {
_selected = next;
if (_selected >= _scroll + VISIBLE_ITEMS) _scroll = _selected - VISIBLE_ITEMS + 1;
if (_selected >= _scroll + _visible_items) _scroll = _selected - _visible_items + 1;
}
return true;
}
@@ -690,14 +691,11 @@ class QuickMsgScreen : public UIScreen {
int _dm_hist_sel, _dm_hist_scroll;
FullscreenMsgView _dm_fs;
static const int VISIBLE = 4;
static const int ITEM_H = 12;
static const int START_Y = 12;
static const int HIST_VISIBLE = 2; // 2-line boxed history entries
static const int HIST_ITEM_H = 21; // box(19) + gap(2)
static const int HIST_BOX_H = 19;
static const int HIST_START_Y = 11;
int _line_h, _item_h, _visible, _hist_visible, _hist_item_h, _hist_box_h;
void expandMsg(const char* tmpl, char* out, int out_len) const {
double lat = 0, lon = 0;
bool gps_valid = false;
@@ -735,8 +733,8 @@ class QuickMsgScreen : public UIScreen {
display.setCursor(display.width() - 6, START_Y);
display.print("^");
}
if (scroll + VISIBLE < count) {
display.setCursor(display.width() - 6, START_Y + (VISIBLE-1)*ITEM_H);
if (scroll + _visible < count) {
display.setCursor(display.width() - 6, START_Y + (_visible-1)*_item_h);
display.print("v");
}
}
@@ -992,6 +990,7 @@ public:
_hist_head(0), _hist_count(0),
_dm_hist_head(0), _dm_hist_count(0),
_dm_hist_sel(-1), _dm_hist_scroll(0),
_line_h(8), _item_h(11), _visible(4), _hist_visible(2), _hist_item_h(21), _hist_box_h(19),
_ctx_dirty(false) {
memset(_ch_unread, 0, sizeof(_ch_unread));
}
@@ -1062,6 +1061,12 @@ public:
int render(DisplayDriver& display) override {
display.setTextSize(1);
_line_h = display.getLineHeight();
_item_h = _line_h + 3;
_visible = (display.height() - START_Y) / _item_h;
_hist_box_h = 2 * _line_h + 3;
_hist_item_h = _hist_box_h + 2;
_hist_visible = (display.height() - HIST_START_Y) / _hist_item_h;
display.setColor(DisplayDriver::LIGHT);
if (_phase == MODE_SELECT) {
@@ -1074,11 +1079,11 @@ public:
_task->getRoomUnreadCount()
};
for (int i = 0; i < 3; i++) {
int y = START_Y + i * ITEM_H;
int y = START_Y + i * _item_h;
bool sel = (i == _mode_sel);
if (sel) {
display.setColor(DisplayDriver::LIGHT);
display.fillRect(0, y - 1, display.width(), ITEM_H - 1);
display.fillRect(0, y - 1, display.width(), _item_h - 1);
display.setColor(DisplayDriver::DARK);
} else {
display.setColor(DisplayDriver::LIGHT);
@@ -1106,15 +1111,15 @@ public:
return 5000;
}
for (int i = 0; i < VISIBLE && (_contact_scroll+i) < _num_contacts; i++) {
for (int i = 0; i < _visible && (_contact_scroll+i) < _num_contacts; i++) {
int list_idx = _contact_scroll + i;
int mesh_idx = _sorted[list_idx];
bool sel = (list_idx == _contact_sel);
int y = START_Y + i * ITEM_H;
int y = START_Y + i * _item_h;
if (sel) {
display.setColor(DisplayDriver::LIGHT);
display.fillRect(0, y - 1, display.width(), ITEM_H - 1);
display.fillRect(0, y - 1, display.width(), _item_h - 1);
display.setColor(DisplayDriver::DARK);
} else {
display.setColor(DisplayDriver::LIGHT);
@@ -1155,14 +1160,14 @@ public:
return 5000;
}
for (int i = 0; i < VISIBLE && (_channel_scroll+i) < _num_channels; i++) {
for (int i = 0; i < _visible && (_channel_scroll+i) < _num_channels; i++) {
int list_idx = _channel_scroll + i;
bool sel = (list_idx == _channel_sel);
int y = START_Y + i * ITEM_H;
int y = START_Y + i * _item_h;
if (sel) {
display.setColor(DisplayDriver::LIGHT);
display.fillRect(0, y - 1, display.width(), ITEM_H - 1);
display.fillRect(0, y - 1, display.width(), _item_h - 1);
display.setColor(DisplayDriver::DARK);
} else {
display.setColor(DisplayDriver::LIGHT);
@@ -1217,10 +1222,10 @@ public:
int dm_count = dmHistCountForContact(_sel_contact.id.pub_key);
for (int i = 0; i < HIST_VISIBLE && (_dm_hist_scroll + i) < dm_count; i++) {
for (int i = 0; i < _hist_visible && (_dm_hist_scroll + i) < dm_count; i++) {
int item = _dm_hist_scroll + i;
bool sel = (item == _dm_hist_sel);
int y = HIST_START_Y + i * HIST_ITEM_H;
int y = HIST_START_Y + i * _hist_item_h;
int ring_pos = dmHistEntryForContact(_sel_contact.id.pub_key, item);
if (ring_pos < 0) continue;
@@ -1230,18 +1235,18 @@ public:
if (sel) {
display.setColor(DisplayDriver::LIGHT);
display.fillRect(0, y, display.width(), HIST_BOX_H);
display.fillRect(0, y, display.width(), _hist_box_h);
display.setColor(DisplayDriver::DARK);
display.drawTextEllipsized(3, y + 1, display.width() - 6, sender);
display.drawTextEllipsized(3, y + 10, display.width() - 6, e.text);
display.drawTextEllipsized(3, y + _line_h + 2, display.width() - 6, e.text);
} else {
display.setColor(DisplayDriver::LIGHT);
display.drawRect(0, y, display.width(), HIST_BOX_H);
display.fillRect(1, y + 1, display.width() - 2, 8);
display.drawRect(0, y, display.width(), _hist_box_h);
display.fillRect(1, y + 1, display.width() - 2, _line_h);
display.setColor(DisplayDriver::DARK);
display.drawTextEllipsized(3, y + 1, display.width() - 6, sender);
display.setColor(DisplayDriver::LIGHT);
display.drawTextEllipsized(3, y + 10, display.width() - 6, e.text);
display.drawTextEllipsized(3, y + _line_h + 2, display.width() - 6, e.text);
}
}
@@ -1255,17 +1260,17 @@ public:
display.setCursor(display.width() - 6, HIST_START_Y + 1);
display.print("^");
}
if (_dm_hist_scroll + HIST_VISIBLE < dm_count) {
display.setCursor(display.width() - 6, HIST_START_Y + HIST_VISIBLE * HIST_ITEM_H - 10);
if (_dm_hist_scroll + _hist_visible < dm_count) {
display.setCursor(display.width() - 6, HIST_START_Y + _hist_visible * _hist_item_h - (_line_h + 2));
display.print("v");
}
bool compose_sel = (_dm_hist_sel == -1);
const char* ctxt = "[+ send]";
int ctw = display.getTextWidth(ctxt);
int cbx = 1, cby = 55;
int cbx = 1, cby = display.height() - _line_h - 1;
if (compose_sel) {
display.fillRect(cbx, cby - 1, ctw + 4, 9);
display.fillRect(cbx, cby - 1, ctw + 4, _line_h + 1);
display.setColor(DisplayDriver::DARK);
}
display.setCursor(cbx + 2, cby);
@@ -1305,10 +1310,10 @@ public:
int ch_hist_count = histCountForChannel(_sel_channel_idx);
for (int i = 0; i < HIST_VISIBLE && (_hist_scroll + i) < ch_hist_count; i++) {
for (int i = 0; i < _hist_visible && (_hist_scroll + i) < ch_hist_count; i++) {
int item = _hist_scroll + i;
bool sel = (item == _hist_sel);
int y = HIST_START_Y + i * HIST_ITEM_H;
int y = HIST_START_Y + i * _hist_item_h;
int ring_pos = histEntryForChannel(_sel_channel_idx, item);
if (ring_pos < 0) continue;
@@ -1329,18 +1334,18 @@ public:
if (sel) {
display.setColor(DisplayDriver::LIGHT);
display.fillRect(0, y, display.width(), HIST_BOX_H);
display.fillRect(0, y, display.width(), _hist_box_h);
display.setColor(DisplayDriver::DARK);
display.drawTextEllipsized(3, y + 1, display.width() - 6, sender);
display.drawTextEllipsized(3, y + 10, display.width() - 6, msg_part);
display.drawTextEllipsized(3, y + _line_h + 2, display.width() - 6, msg_part);
} else {
display.setColor(DisplayDriver::LIGHT);
display.drawRect(0, y, display.width(), HIST_BOX_H);
display.fillRect(1, y + 1, display.width() - 2, 8);
display.drawRect(0, y, display.width(), _hist_box_h);
display.fillRect(1, y + 1, display.width() - 2, _line_h);
display.setColor(DisplayDriver::DARK);
display.drawTextEllipsized(3, y + 1, display.width() - 6, sender);
display.setColor(DisplayDriver::LIGHT);
display.drawTextEllipsized(3, y + 10, display.width() - 6, msg_part);
display.drawTextEllipsized(3, y + _line_h + 2, display.width() - 6, msg_part);
}
}
@@ -1355,8 +1360,8 @@ public:
display.setCursor(display.width() - 6, HIST_START_Y + 1);
display.print("^");
}
if (_hist_scroll + HIST_VISIBLE < ch_hist_count) {
display.setCursor(display.width() - 6, HIST_START_Y + HIST_VISIBLE * HIST_ITEM_H - 10);
if (_hist_scroll + _hist_visible < ch_hist_count) {
display.setCursor(display.width() - 6, HIST_START_Y + _hist_visible * _hist_item_h - (_line_h + 2));
display.print("v");
}
@@ -1364,14 +1369,14 @@ public:
bool compose_sel = (_hist_sel == -1);
const char* ctxt = "[+ send]";
int ctw = display.getTextWidth(ctxt);
int cbx = 1, cby = 55;
int cbx = 1, cby = display.height() - _line_h - 1;
if (compose_sel) {
display.setColor(DisplayDriver::LIGHT);
display.fillRect(cbx - 1, cby - 1, ctw + 4, 10);
display.fillRect(cbx - 1, cby - 1, ctw + 4, _line_h + 2);
display.setColor(DisplayDriver::DARK);
} else {
display.setColor(DisplayDriver::LIGHT);
display.drawRect(cbx - 1, cby - 1, ctw + 4, 10);
display.drawRect(cbx - 1, cby - 1, ctw + 4, _line_h + 2);
}
display.setCursor(cbx + 1, cby);
display.print(ctxt);
@@ -1393,14 +1398,14 @@ public:
display.fillRect(0, 10, display.width(), 1);
int total_msg_items = 1 + _active_msg_count;
for (int i = 0; i < VISIBLE && (_msg_scroll+i) < total_msg_items; i++) {
for (int i = 0; i < _visible && (_msg_scroll+i) < total_msg_items; i++) {
int idx = _msg_scroll + i;
bool sel = (idx == _msg_sel);
int y = START_Y + i * ITEM_H;
int y = START_Y + i * _item_h;
if (sel) {
display.setColor(DisplayDriver::LIGHT);
display.fillRect(0, y - 1, display.width(), ITEM_H - 1);
display.fillRect(0, y - 1, display.width(), _item_h - 1);
display.setColor(DisplayDriver::DARK);
} else {
display.setColor(DisplayDriver::LIGHT);
@@ -1475,7 +1480,7 @@ public:
}
if (c == KEY_DOWN && _contact_sel < _num_contacts - 1) {
_contact_sel++;
if (_contact_sel >= _contact_scroll + VISIBLE) _contact_scroll = _contact_sel - VISIBLE + 1;
if (_contact_sel >= _contact_scroll + _visible) _contact_scroll = _contact_sel - _visible + 1;
return true;
}
if (c == KEY_ENTER && _num_contacts > 0) {
@@ -1536,7 +1541,7 @@ public:
}
if (c == KEY_DOWN && _channel_sel < _num_channels - 1) {
_channel_sel++;
if (_channel_sel >= _channel_scroll + VISIBLE) _channel_scroll = _channel_sel - VISIBLE + 1;
if (_channel_sel >= _channel_scroll + _visible) _channel_scroll = _channel_sel - _visible + 1;
return true;
}
if (c == KEY_ENTER && _num_channels > 0) {
@@ -1593,8 +1598,8 @@ public:
if (_dm_hist_sel == -1 && dm_count > 0) { _dm_hist_sel = 0; _dm_hist_scroll = 0; }
else if (_dm_hist_sel >= 0 && _dm_hist_sel < dm_count - 1) {
_dm_hist_sel++;
if (_dm_hist_sel >= _dm_hist_scroll + HIST_VISIBLE)
_dm_hist_scroll = _dm_hist_sel - HIST_VISIBLE + 1;
if (_dm_hist_sel >= _dm_hist_scroll + _hist_visible)
_dm_hist_scroll = _dm_hist_sel - _hist_visible + 1;
}
return true;
}
@@ -1633,7 +1638,7 @@ public:
if (_hist_sel == -1 && ch_hist_count > 0) { _hist_sel = 0; _hist_scroll = 0; }
else if (_hist_sel >= 0 && _hist_sel < ch_hist_count - 1) {
_hist_sel++;
if (_hist_sel >= _hist_scroll + HIST_VISIBLE) _hist_scroll = _hist_sel - HIST_VISIBLE + 1;
if (_hist_sel >= _hist_scroll + _hist_visible) _hist_scroll = _hist_sel - _hist_visible + 1;
}
updateChannelUnread();
return true;
@@ -1677,7 +1682,7 @@ public:
}
if (c == KEY_DOWN && _msg_sel < total_msg_items - 1) {
_msg_sel++;
if (_msg_sel >= _msg_scroll + VISIBLE) _msg_scroll = _msg_sel - VISIBLE + 1;
if (_msg_sel >= _msg_scroll + _visible) _msg_scroll = _msg_sel - _visible + 1;
return true;
}
if (c == KEY_ENTER) {

2
src/helpers/ui/DisplayDriver.h
View File

@@ -27,6 +27,8 @@ public:
virtual void drawRect(int x, int y, int w, int h) = 0;
virtual void drawXbm(int x, int y, const uint8_t* bits, int w, int h) = 0;
virtual uint16_t getTextWidth(const char* str) = 0;
virtual int getCharWidth() const { return 6; } // advance width of a typical character (xAdvance for monospace)
virtual int getLineHeight() const { return 8; } // pixel rows per line (cell height, not just glyph height)
virtual void drawTextCentered(int mid_x, int y, const char* str) { // helper method (override to optimise)
int w = getTextWidth(str);
setCursor(mid_x - w/2, y);

19
src/helpers/ui/LemonIcons.h Normal file
View File

@@ -0,0 +1,19 @@
// Lemon font icon glyphs (Private Use Area), converted manually from lemon.bdf
// Add new icons by appending to the bitmap array, lemonIconCPs, and lemonIconGlyphs.
#pragma once
#include <Adafruit_GFX.h>
static const uint8_t lemonIconBitmaps[] PROGMEM = {
0xEE, 0xBA, 0x2B, 0xA3, 0xB0, // U+E03B mute: 6×6, yoff=0
};
static const uint32_t lemonIconCPs[] PROGMEM = {
0xE03B, // mute
};
static const GFXglyph lemonIconGlyphs[] PROGMEM = {
// off w h adv xo yo
{ 0, 6, 6, 5, 0, -6 }, // U+E03B mute
};
static const uint8_t lemonIconCount = sizeof(lemonIconCPs) / sizeof(lemonIconCPs[0]);

24
src/helpers/ui/SH1106Display.cpp
View File

@@ -2,6 +2,7 @@
#include <Adafruit_GrayOLED.h>
#include "Adafruit_SH110X.h"
#include "LemonFont.h"
#include "LemonIcons.h"
bool SH1106Display::i2c_probe(TwoWire &wire, uint8_t addr)
{
@@ -90,6 +91,27 @@ uint32_t SH1106Display::decodeUtf8(const uint8_t*& p) {
// Draw one Lemon glyph at (x, y), return new cursor x.
int16_t SH1106Display::drawLemonChar(int16_t x, int16_t y, uint32_t cp) {
// Check icon table for Private Use Area codepoints
for (uint8_t i = 0; i < lemonIconCount; i++) {
if (pgm_read_dword(&lemonIconCPs[i]) == cp) {
const GFXglyph* g = &lemonIconGlyphs[i];
uint8_t w = pgm_read_byte(&g->width);
uint8_t h = pgm_read_byte(&g->height);
int8_t xo = (int8_t)pgm_read_byte(&g->xOffset);
int8_t yo = (int8_t)pgm_read_byte(&g->yOffset);
uint8_t xa = pgm_read_byte(&g->xAdvance);
uint16_t bo = pgm_read_word(&g->bitmapOffset);
uint8_t bits = 0, bit = 0;
for (uint8_t row = 0; row < h; row++)
for (uint8_t col = 0; col < w; col++) {
if (!bit) { bits = pgm_read_byte(&lemonIconBitmaps[bo++]); bit = 0x80; }
if (bits & bit) display.drawPixel(x + xo + col, y + 6 + yo + row, _color);
bit >>= 1;
}
return x + xa;
}
}
if (cp < Lemon.first || cp > Lemon.last) {
// outside font range — use default advance
return x + 6;
@@ -107,7 +129,7 @@ int16_t SH1106Display::drawLemonChar(int16_t x, int16_t y, uint32_t cp) {
for (uint8_t col = 0; col < w; col++) {
if (!bit) { bits = pgm_read_byte(&lemonBitmaps[bo++]); bit = 0x80; }
if (bits & bit)
display.drawPixel(x + xo + col, y + yo + row, _color);
display.drawPixel(x + xo + col, y + 6 + yo + row, _color); // +6 = cap height: cursor y aligns with top of uppercase/digit glyphs
bit >>= 1;
}
}

2
src/helpers/ui/SH1106Display.h
View File

@@ -45,6 +45,8 @@ public:
void drawRect(int x, int y, int w, int h) override;
void drawXbm(int x, int y, const uint8_t *bits, int w, int h) override;
uint16_t getTextWidth(const char *str) override;
int getCharWidth() const override { return 5; } // Lemon font: xAdvance = 5
int getLineHeight() const override { return 9; } // Lemon font: visual line spacing (yAdvance=10, used as 9 for tighter fit)
void setBrightness(uint8_t level) override;
void endFrame() override;