diff options
Diffstat (limited to 'lpg/libqr/code-layout.c')
| -rw-r--r-- | lpg/libqr/code-layout.c | 52 |
1 files changed, 40 insertions, 12 deletions
diff --git a/lpg/libqr/code-layout.c b/lpg/libqr/code-layout.c index 09f29a8..46d2800 100644 --- a/lpg/libqr/code-layout.c +++ b/lpg/libqr/code-layout.c @@ -1,7 +1,10 @@ +#include <assert.h> #include <limits.h> #include <stdlib.h> +#include <string.h> #include "code-common.h" #include "code-layout.h" +#include "qr-bitmap.h" struct qr_iterator { struct qr_code * code; @@ -13,24 +16,49 @@ struct qr_iterator { unsigned char * p; }; -static int is_data_bit(const struct qr_iterator * i) +void qr_layout_init_mask(struct qr_code * code) { - if (i->row == 6 || i->column == 6) /* timing */ - return 0; + int x, y; + int dim = code_side_length(code->format); + struct qr_bitmap * bmp = code->modules; + + assert(bmp->mask); + + memset(bmp->mask, 0, bmp->height * bmp->stride); + + /* slow and stupid, but I'm sleepy */ + for (y = 0; y < bmp->height; ++y) { + unsigned char * row = bmp->mask + y * bmp->stride; + for (x = 0; x < bmp->width; ++x) { + unsigned char bit = 1 << (x % CHAR_BIT); + int off = x / CHAR_BIT; + + if (x == 6 || y == 6) /* timing */ + continue; + + if (x < 9 && y < 9) /* top-left */ + continue; - if (i->column < 9 && i->row < 9) /* top-left */ - return 0; + if (x >= dim - 8 && y < 9) /* top-right */ + continue; - if (i->column >= i->dim - 8 && i->row < 9) /* top-right */ - return 0; + if (x < 9 && y >= dim - 8) /* bottom-left */ + continue; - if (i->column < 9 && i->row >= i->dim - 8) /* bottom-left */ - return 0; + /* XXX: format data */ + /* XXX: alignment pattern */ - /* XXX: format data */ - /* XXX: alignment pattern */ + row[off] |= bit; + } + } +} + +static int is_data_bit(const struct qr_iterator * i) +{ + unsigned char bit = 1 << (i->column % CHAR_BIT); + int off = (i->row * i->code->modules->stride) + (i->column / CHAR_BIT); - return 1; + return i->code->modules->mask[off] & bit; } static void set_pointer(struct qr_iterator * i) |