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Bugfix issue #2179

This commit is contained in:
kraus 2023-06-06 20:44:42 +02:00
parent 1f4c239165
commit 78c6b28f08
1 changed files with 27 additions and 0 deletions
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27
sys/arduino/u8g2_page_buffer/LoadFromSD/LoadFromSD.ino
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@ -479,6 +479,9 @@ void drawFile(u8g2_int_t x, u8g2_int_t y, const char *filename) {
len = w; // len will contain the horizontal number of pixel
mask = 1;
b = myFile.read(); // load the first 8 pixel into "b"
/* The following code has an issue with some values for "w", see issue 2179 */
/*
while(len > 0) { // draw all pixel of one line
if ( b & mask ) { // check one pixel
u8g2.setDrawColor(1);
@ -496,6 +499,30 @@ void drawFile(u8g2_int_t x, u8g2_int_t y, const char *filename) {
}
len--; // decrease the horizontal width (remaining pixel)
}
*/
/* new code */
for(;;) { // draw all pixel of one line
if ( b & mask ) { // check one pixel
u8g2.setDrawColor(1);
u8g2.drawPixel(xpos,y);
} else {
u8g2.setDrawColor(0);
u8g2.drawPixel(xpos,y);
}
xpos++; // calculate next x pos of the pixel
mask <<= 1; // update the mask
len--; // decrease the horizontal width (remaining pixel)
if ( len == 0 ) // check if row is finished
break;
if ( mask == 0 )
{
mask = 1; // revert mask and ...
b = myFile.read(); // ... load the next 8 pixel values from the file
}
}
y++; // goto next line
h--; // decrease the number of remaining lines
}