Bodmer/TFT_eSPI
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Tweak padding

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Allows for negative x offsets in fonts
This commit is contained in:
Bodmer
2017-03-12 01:16:07 +00:00
parent 189a390f34
commit c2cf07db1e
1 changed files with 36 additions and 9 deletions
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47
TFT_eSPI.cpp
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@@ -2674,10 +2674,19 @@ int16_t TFT_eSPI::drawString(const char *string, int poX, int poY, int font)
}
#ifdef LOAD_GFXFF
int8_t xo = 0;
if ((font == 1) && (gfxFont) && (textcolor!=textbgcolor))
{
cheight = (glyph_ab + glyph_bb) * textsize;
fillRect(poX, poY - glyph_ab * textsize, cwidth, cheight, textbgcolor);
// Get the offset for the first character only to allow for negative offsets
uint8_t c2 = *string - pgm_read_byte(&gfxFont->first);
GFXglyph *glyph = &(((GFXglyph *)pgm_read_dword(&gfxFont->glyph))[c2]);
xo = pgm_read_byte(&glyph->xOffset) * textsize;
// Adjust for negative xOffset, also see line 2708 below
if (xo < 0) cwidth -= xo;
// Add 1 pixel of padding all round
cheight +=2;
fillRect(poX+xo-1, poY - 1 - glyph_ab * textsize, cwidth+2, cheight, textbgcolor);
padding -=100;
}
#endif
@@ -2693,11 +2702,12 @@ int16_t TFT_eSPI::drawString(const char *string, int poX, int poY, int font)
if((padX>cwidth) && (textcolor!=textbgcolor))
{
int16_t padXc = poX+cwidth;
int16_t padXc = poX+cwidth;//+xo;
#ifdef LOAD_GFXFF
if ((font == 1) && (gfxFont))
{
poY -= glyph_ab * textsize;
poX +=xo; // Adjust for negative offset start character
poY -= 1 + glyph_ab * textsize;
}
#endif
switch(padding) {
@@ -2907,14 +2917,31 @@ void TFT_eSPI::setFreeFont(const GFXfont *f) {
textfont = 1;
gfxFont = (GFXfont *)f;
// Save above baseline (for say H) and below baseline (for y tail) heights
uint16_t uniCode = FF_HEIGHT - pgm_read_byte(&gfxFont->first);
GFXglyph *glyph1 = &(((GFXglyph *)pgm_read_dword(&gfxFont->glyph))[uniCode]);
glyph_ab = -pgm_read_byte(&glyph1->yOffset);
glyph_ab = 0;
glyph_bb = 0;
uint8_t numChars = pgm_read_byte(&gfxFont->last) - pgm_read_byte(&gfxFont->first);
uniCode = FF_BOTTOM - pgm_read_byte(&gfxFont->first);
GFXglyph *glyph2 = &(((GFXglyph *)pgm_read_dword(&gfxFont->glyph))[uniCode]);
glyph_bb = pgm_read_byte(&glyph2->height) + (int8_t)pgm_read_byte(&glyph2->yOffset);
// Find the biggest above and below baseline offsets
for (uint8_t c = 0; c < numChars; c++)
{
GFXglyph *glyph1 = &(((GFXglyph *)pgm_read_dword(&gfxFont->glyph))[c]);
int8_t ab = -pgm_read_byte(&glyph1->yOffset);
if (ab > glyph_ab) glyph_ab = ab;
int8_t bb = pgm_read_byte(&glyph1->height) - ab;
if (bb > glyph_bb) glyph_bb = bb;
}
//Serial.print("new glyph_ab=");Serial.println(glyph_ab);
//Serial.print("new glyph_bb=");Serial.println(glyph_bb);
// Save above baseline (for say H) and below baseline (for y tail) heights
//uint16_t uniCode = FF_HEIGHT - pgm_read_byte(&gfxFont->first);
//GFXglyph *glyph1 = &(((GFXglyph *)pgm_read_dword(&gfxFont->glyph))[uniCode]);
//glyph_ab = -pgm_read_byte(&glyph1->yOffset);
//uniCode = FF_BOTTOM - pgm_read_byte(&gfxFont->first);
//GFXglyph *glyph2 = &(((GFXglyph *)pgm_read_dword(&gfxFont->glyph))[uniCode]);
//glyph_bb = pgm_read_byte(&glyph2->height) + (int8_t)pgm_read_byte(&glyph2->yOffset);
//Serial.print("glyph_ab=");Serial.println(glyph_ab);
//Serial.print("glyph_bb=");Serial.println(glyph_bb);
}