Jan/WLED_MM_Infinity
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trying to keep scrolling text readable

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the problem (partly solved) is that scrolling text does not erase any previous text, but simply paints pixels in addition.

* add a "shadow" area around each letter, which is explicitly painted black
* only possible when  Trail=0, and overlay option selected
This commit is contained in:
Frank
2024-09-28 02:12:53 +02:00
parent 0ca3f136b1
commit 3a506aded2
3 changed files with 32 additions and 10 deletions
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35
wled00/FX_2Dfcn.cpp
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@@ -880,7 +880,7 @@ bool Segment::jsonToPixels(char * name, uint8_t fileNr) {
// draws a raster font character on canvas
// only supports: 4x6=24, 5x8=40, 5x12=60, 6x8=48 and 7x9=63 fonts ATM
void Segment::drawCharacter(unsigned char chr, int16_t x, int16_t y, uint8_t w, uint8_t h, uint32_t color, uint32_t col2) {
void Segment::drawCharacter(unsigned char chr, int16_t x, int16_t y, uint8_t w, uint8_t h, uint32_t color, uint32_t col2, bool drawShadow) {
if (!isActive()) return; // not active
if (chr < 32 || chr > 126) return; // only ASCII 32-126 supported
chr -= 32; // align with font table entries
@@ -890,6 +890,7 @@ void Segment::drawCharacter(unsigned char chr, int16_t x, int16_t y, uint8_t w,
CRGB col = CRGB(color);
CRGBPalette16 grad = CRGBPalette16(col, col2 ? CRGB(col2) : col);
uint32_t bgCol = SEGCOLOR(1);
//if (w<5 || w>6 || h!=8) return;
for (int i = 0; i<h; i++) { // character height
@@ -897,19 +898,39 @@ void Segment::drawCharacter(unsigned char chr, int16_t x, int16_t y, uint8_t w,
if (y0 < 0) continue; // drawing off-screen
if (y0 >= rows) break; // drawing off-screen
uint8_t bits = 0;
uint8_t bits_up = 0; // WLEDMM this is the previous line: font[(chr * h) + i -1]
switch (font) {
case 24: bits = pgm_read_byte_near(&console_font_4x6[(chr * h) + i]); break; // 5x8 font
case 40: bits = pgm_read_byte_near(&console_font_5x8[(chr * h) + i]); break; // 5x8 font
case 48: bits = pgm_read_byte_near(&console_font_6x8[(chr * h) + i]); break; // 6x8 font
case 63: bits = pgm_read_byte_near(&console_font_7x9[(chr * h) + i]); break; // 7x9 font
case 60: bits = pgm_read_byte_near(&console_font_5x12[(chr * h) + i]); break; // 5x12 font
case 24: bits = pgm_read_byte_near(&console_font_4x6[(chr * h) + i]);
if ((i>0) && drawShadow) bits_up = pgm_read_byte_near(&console_font_4x6[(chr * h) + i -1]);
break; // 5x8 font
case 40: bits = pgm_read_byte_near(&console_font_5x8[(chr * h) + i]);
if ((i>0) && drawShadow) bits_up = pgm_read_byte_near(&console_font_5x8[(chr * h) + i -1]);
break; // 5x8 font
case 48: bits = pgm_read_byte_near(&console_font_6x8[(chr * h) + i]);
if ((i>0) && drawShadow) bits_up = pgm_read_byte_near(&console_font_6x8[(chr * h) + i -1]);
break; // 6x8 font
case 63: bits = pgm_read_byte_near(&console_font_7x9[(chr * h) + i]);
if ((i>0) && drawShadow) bits_up = pgm_read_byte_near(&console_font_7x9[(chr * h) + i -1]);
break; // 7x9 font
case 60: bits = pgm_read_byte_near(&console_font_5x12[(chr * h) + i]);
if ((i>0) && drawShadow) bits_up = pgm_read_byte_near(&console_font_5x12[(chr * h) + i -1]);
break; // 5x12 font
default: return;
}
col = ColorFromPalette(grad, (i+1)*255/h, 255, NOBLEND);
for (int j = 0; j<w; j++) { // character width
int16_t x0 = x + (w-1) - j;
if ((x0 >= 0 || x0 < cols) && ((bits>>(j+(8-w))) & 0x01)) { // bit set & drawing on-screen
if ((x0 >= 0) || (x0 < cols)) {
if ((bits>>(j+(8-w))) & 0x01) { // bit set & drawing on-screen
setPixelColorXY(x0, y0, col);
} else {
if (drawShadow) {
// WLEDMM
if ((j < (w-1)) && (bits>>(j+(8-w) +1)) & 0x01) setPixelColorXY(x0, y0, bgCol); // blank when pixel to the right is set
else if ((j > 0) && (bits>>(j+(8-w) -1)) & 0x01) setPixelColorXY(x0, y0, bgCol);// blank when pixel to the left is set
else if ((bits_up>>(j+(8-w))) & 0x01) setPixelColorXY(x0, y0, bgCol); // blank when pixel above is set
}
}
}
}
}