diff options
| -rw-r--r-- | payloads/libpayload/drivers/video/graphics.c | 27 |
1 files changed, 13 insertions, 14 deletions
diff --git a/payloads/libpayload/drivers/video/graphics.c b/payloads/libpayload/drivers/video/graphics.c index 2bf5e19d88..563f2961c7 100644 --- a/payloads/libpayload/drivers/video/graphics.c +++ b/payloads/libpayload/drivers/video/graphics.c @@ -858,24 +858,25 @@ static int draw_bitmap_v3(const struct vector *top_left, } /* - * Initialize the sample array for this line. For pixels to the - * left of S0 there are no corresponding input pixels so just - * copy the S0 values over. - * - * Also initialize the equals counter, which counts how many of - * the latest pixels were exactly equal. We know the columns - * left of S0 must be equal to S0, so start with that number. + * Initialize the sample array for this line, and also + * the equals counter, which counts how many of the latest + * pixels were exactly equal. */ - int equals = S0 * SSZ; + int equals = 0; uint8_t last_equal = ypix[0][0]; - for (sy = 0; sy < SSZ; sy++) { - for (sx = S0; sx < SSZ; sx++) { - if (sx >= dim_org->width) { + for (sx = 0; sx < SSZ; sx++) { + for (sy = 0; sy < SSZ; sy++) { + if (sx - S0 >= dim_org->width) { sample[sx][sy] = sample[sx - 1][sy]; equals++; continue; } - uint8_t i = ypix[sy][sx - S0]; + /* + * For pixels to the left of S0 there are no + * corresponding input pixels so just use + * ypix[sy][0]. + */ + uint8_t i = ypix[sy][MAX(0, sx - S0)]; if (pal_to_rgb(i, pal, header->colors_used, &sample[sx][sy])) goto bitmap_error; @@ -886,8 +887,6 @@ static int draw_bitmap_v3(const struct vector *top_left, equals = 1; } } - for (sx = S0 - 1; sx >= 0; sx--) - sample[sx][sy] = sample[S0][sy]; } ix = 0; |