diff options
| author | Werner Lemberg <wl@gnu.org> | 2011-02-22 10:29:30 +0100 |
|---|---|---|
| committer | Werner Lemberg <wl@gnu.org> | 2011-02-22 10:29:30 +0100 |
| commit | 6af024231b65f8a10b9d1f5f08b5774cf3edbe0a (patch) | |
| tree | 268f60f98fbac832315c7dad5dcf746c5f269324 /src | |
| parent | ae6d1d7b98880e90af9452d25e9cbdd4f9d97966 (diff) | |
[autofit] Add ASCII drawing for better explanation.
Diffstat (limited to 'src')
| -rw-r--r-- | src/autofit/afhints.h | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/src/autofit/afhints.h b/src/autofit/afhints.h index d63b9796..649d4a9d 100644 --- a/src/autofit/afhints.h +++ b/src/autofit/afhints.h @@ -91,6 +91,20 @@ FT_BEGIN_HEADER * edges; they are specific to a script. * * + * A H + * | | + * | | + * | | + * | | + * C | | F + * +------<-----+ +-----<------+ + * | B G | + * | | + * | | + * +--------------->------------------+ + * D E + * + * * Stems * * Segments need to be `linked' to other ones in order to detect stems. @@ -99,6 +113,9 @@ FT_BEGIN_HEADER * vocabulary from the TrueType specification, stem segments form a * `black distance'. * + * In the above ASCII drawing, the horizontal segments are BC, DE, and + * FG; the vertical segments are AB, CD, EF, and GH. + * * Each segment has at most one `best' candidate to form a black * distance, or no candidate at all. Notice that two distinct segments * can have the same candidate, which frequently means a serif. @@ -112,6 +129,11 @@ FT_BEGIN_HEADER * * Stems are detected by `af_{cjk,latin,...}_hint_edges'. * + * In the above ASCII drawing, the best candidate for both AB and CD is + * GH, while the best candidate for GH is AB. Similarly, the best + * candidate for EF and GH is AB, while the best candidate for AB is + * GH. + * * * Serifs * @@ -119,7 +141,8 @@ FT_BEGIN_HEADER * * best segment_1 = segment_2 && best segment_2 != segment_1 * - * where segment_1 corresponds to the serif segment. + * where segment_1 corresponds to the serif segment (CD and EF in the + * above ASCII drawing). * * The best candidate is stored in field `serif' in structure * `AF_Segment' (and `link' is set to NULL). |