djsundog
/
circuitpython
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Merge pull request #1810 from tannewt/black_line_ondisk 

Fix off by one error in OnDiskBitmap
This commit is contained in:
Dan Halbert 2019-04-17 20:27:31 -04:00 committed by GitHub
parent fcfafe6ced c372567330
commit 00379dbb7e
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 7 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
shared-module/displayio/OnDiskBitmap.c
View File

@ -123,12 +123,13 @@ uint32_t common_hal_displayio_ondiskbitmap_get_pixel(displayio_ondiskbitmap_t *s
if (x < 0 || x >= self->width || y < 0 || y >= self->height) { if (x < 0 || x >= self->width || y < 0 || y >= self->height) {
return 0; return 0;
} }
uint32_t location; uint32_t location;
uint8_t bytes_per_pixel = (self->bits_per_pixel / 8) ? (self->bits_per_pixel /8) : 1; uint8_t bytes_per_pixel = (self->bits_per_pixel / 8) ? (self->bits_per_pixel /8) : 1;
if (self->bits_per_pixel >= 8){ if (self->bits_per_pixel >= 8){
location = self->data_offset + (self->height - y) * self->stride + x * bytes_per_pixel; location = self->data_offset + (self->height - y - 1) * self->stride + x * bytes_per_pixel;
} else { } else {
location = self->data_offset + (self->height - y) * self->stride + x / 8; location = self->data_offset + (self->height - y - 1) * self->stride + x / 8;
} }
// We don't cache here because the underlying FS caches sectors. // We don't cache here because the underlying FS caches sectors.
f_lseek(&self->file->fp, location); f_lseek(&self->file->fp, location);