thooge/esp32-nmea2000-obp60
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Fix image converter

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This commit is contained in:
Norbert Walter
2026-02-28 16:13:15 +00:00
parent 7434601382
commit 42c147ac57
1 changed files with 10 additions and 4 deletions
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lib/obp60task/OBP60Extensions.h
+10 -4
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@@ -155,20 +155,26 @@ inline void drawMonochromeBitmap(
int16_t w, int16_t h,
uint16_t color,
bool vertical=false, // true: bytes run vertically (each byte 8 pixels down)
bool lsbFirst=false) // true: least significant bit = left/top pixel
bool lsbFirst=false, // true: least significant bit = left/top pixel
bool mirrorX=false) // true: bytes run right-to-left within each row
{
#ifdef DISPLAY_ST7796
// TFT converts per‑pixel
int bytesPerRow = (w + 7) / 8;
for (int yy = 0; yy < h; yy++) {
for (int xx = 0; xx < w; xx++) {
int byteIdx;
int bitIdx;
if (vertical) {
byteIdx = xx * ((h + 7) / 8) + (yy / 8);
// vertical packing: column-major bytes
int col = mirrorX ? (w - 1 - xx) : xx;
byteIdx = col * ((h + 7) / 8) + (yy / 8);
bitIdx = yy % 8;
} else {
byteIdx = yy * ((w + 7) / 8) + (xx / 8);
bitIdx = xx % 8;
// horizontal packing: row-major bytes
int col = mirrorX ? (w - 1 - xx) : xx;
byteIdx = yy * bytesPerRow + (col / 8);
bitIdx = col % 8;
}
uint8_t b = bmp[byteIdx];
bool pix;