diff options
Diffstat (limited to 'lpg')
| -rw-r--r-- | lpg/libqr/bitmap.c | 20 | ||||
| -rw-r--r-- | lpg/libqr/qr/bitmap.h | 2 |
2 files changed, 12 insertions, 10 deletions
diff --git a/lpg/libqr/bitmap.c b/lpg/libqr/bitmap.c index b9d3763..1c4e38b 100644 --- a/lpg/libqr/bitmap.c +++ b/lpg/libqr/bitmap.c @@ -137,11 +137,10 @@ static void render_line_2(unsigned char * out, unsigned long space) { unsigned char in_mask; - size_t n, b, step, shift; + size_t n, b, step; in_mask = 1; step = CHAR_BIT / mod_bits; - shift = CHAR_BIT - mod_bits; n = dim; while (n > 0) { @@ -156,11 +155,9 @@ static void render_line_2(unsigned char * out, ++in; } - tmp = (tmp >> mod_bits) | (v << shift); - if (--n == 0) { - tmp >>= b * mod_bits; + tmp |= v << (b * mod_bits); + if (--n == 0) break; - } }; *out++ = tmp; @@ -170,7 +167,7 @@ static void render_line_2(unsigned char * out, void qr_bitmap_render(const struct qr_bitmap * bmp, void * buffer, int mod_bits, - size_t line_stride, + ptrdiff_t line_stride, int line_repeat, unsigned long mark, unsigned long space) @@ -188,6 +185,9 @@ void qr_bitmap_render(const struct qr_bitmap * bmp, out = buffer; dim = bmp->width; + mark &= (1 << mod_bits) - 1; + space &= (1 << mod_bits) - 1; + n = dim; while (n-- > 0) { size_t rpt; @@ -200,8 +200,10 @@ void qr_bitmap_render(const struct qr_bitmap * bmp, rpt = line_repeat; next = out + line_stride; - while (rpt-- > 0) { - memcpy(next, out, line_stride); + while (--rpt > 0) { + size_t bits = dim * mod_bits; + size_t bytes = bits / CHAR_BIT + !!(bits % CHAR_BIT); + memcpy(next, out, bytes); next += line_stride; } diff --git a/lpg/libqr/qr/bitmap.h b/lpg/libqr/qr/bitmap.h index 72da07f..57b33e0 100644 --- a/lpg/libqr/qr/bitmap.h +++ b/lpg/libqr/qr/bitmap.h @@ -24,7 +24,7 @@ void qr_bitmap_merge(struct qr_bitmap * dest, const struct qr_bitmap * src); void qr_bitmap_render(const struct qr_bitmap * bmp, void * buffer, int mod_bits, - size_t line_stride, + ptrdiff_t line_stride, int line_repeat, unsigned long mark, unsigned long space); |