src/Makefile.sources | 1
src/hb-ot-font.cc | 1
src/hb-ot-layout-common-private.hh | 8 +
src/hb-ot-var-avar-table.hh | 1
src/hb-ot-var-fvar-table.hh | 1
src/hb-ot-var-hvar-table.hh | 165 +++++++++++++++++++++++++++++++++++++
6 files changed, 175 insertions(+), 2 deletions(-)
New commits:
commit a4fca9f0051dbc177390a4e555b2d0fe642f724e
Author: Behdad Esfahbod <beh...@behdad.org>
Date: Mon Jan 23 11:56:08 2017 -0800
[var] Implement DeltaSetIndexMap and advance delta fetching
Not hooked up to hb-ot-font yet.
diff --git a/src/hb-ot-layout-common-private.hh
b/src/hb-ot-layout-common-private.hh
index 92b5c17..180e5f0 100644
--- a/src/hb-ot-layout-common-private.hh
+++ b/src/hb-ot-layout-common-private.hh
@@ -1323,6 +1323,14 @@ struct VariationStore
this+regions);
}
+ inline float get_delta (unsigned int index,
+ int *coords, unsigned int coord_count) const
+ {
+ unsigned int outer = index >> 16;
+ unsigned int inner = index & 0xFFFF;
+ return get_delta (outer, inner, coords, coord_count);
+ }
+
inline bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
diff --git a/src/hb-ot-var-hvar-table.hh b/src/hb-ot-var-hvar-table.hh
index 0cb24d2..cf22c9d 100644
--- a/src/hb-ot-var-hvar-table.hh
+++ b/src/hb-ot-var-hvar-table.hh
@@ -39,12 +39,52 @@ struct DeltaSetIndexMap
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this) &&
- c->check_array (this, 1, 12));
+ c->check_array (mapData, get_width (), mapCount));
}
- USHORT x;
+ unsigned int map (unsigned int v) const /* Returns 16.16 outer.inner. */
+ {
+ /* If count is zero, pass value unchanged. This takes
+ * care of direct mapping for advance map. */
+ if (!mapCount)
+ return v;
+
+ if (v >= mapCount)
+ v = mapCount - 1;
+
+ unsigned int u = 0;
+ { /* Fetch it. */
+ unsigned int w = get_width ();
+ const BYTE *p = mapData + w * v;
+ for (; w; w--)
+ u = (u << 8) + *p++;
+ }
+
+ { /* Repack it. */
+ unsigned int n = get_inner_bitcount ();
+ unsigned int outer = u >> n;
+ unsigned int inner = u & ((1 << n) - 1);
+ u = (outer<<16) | inner;
+ }
+
+ return u;
+ }
+
+ protected:
+ inline bool get_width (void) const
+ { return ((format >> 4) & 3) + 1; }
+
+ inline bool get_inner_bitcount (void) const
+ { return (format & 0xF) + 1; }
+
+ protected:
+ USHORT format; /* A packed field that describes the compressed
+ * representation of delta-set indices. */
+ USHORT mapCount; /* The number of mapping entries. */
+ BYTE mapData[VAR]; /* The delta-set index mapping data. */
+
public:
- DEFINE_SIZE_STATIC (2);
+ DEFINE_SIZE_ARRAY (4, mapData);
};
@@ -72,6 +112,16 @@ struct HVARVVAR
rsbMap.sanitize (c, this));
}
+ inline float get_advance_delta (hb_codepoint_t glyph,
+ int *coords, unsigned int coord_count) const
+ {
+ unsigned int varidx = (this+advMap).map (glyph);
+ return (this+varStore).get_delta (varidx, coords, coord_count);
+ }
+
+ inline bool has_sidebearing_deltas (void) const
+ { return lsbMap && rsbMap; }
+
protected:
FixedVersion<>version; /* Version of the metrics variation table
* initially set to 0x00010000u */
commit 7b399f73efa76cd97131fd123a9a1566f8639cfd
Author: Behdad Esfahbod <beh...@behdad.org>
Date: Mon Jan 23 11:41:43 2017 -0800
[var] Start adding HVAR/VVAR
diff --git a/src/Makefile.sources b/src/Makefile.sources
index c74147c..8d7f1a0 100644
--- a/src/Makefile.sources
+++ b/src/Makefile.sources
@@ -111,6 +111,7 @@ HB_OT_sources = \
hb-ot-var.cc \
hb-ot-var-avar-table.hh \
hb-ot-var-fvar-table.hh \
+ hb-ot-var-hvar-table.hh \
$(NULL)
HB_OT_headers = \
diff --git a/src/hb-ot-font.cc b/src/hb-ot-font.cc
index f84dbc2..c7286b7 100644
--- a/src/hb-ot-font.cc
+++ b/src/hb-ot-font.cc
@@ -37,6 +37,7 @@
#include "hb-ot-hhea-table.hh"
#include "hb-ot-hmtx-table.hh"
#include "hb-ot-os2-table.hh"
+#include "hb-ot-var-hvar-table.hh"
//#include "hb-ot-post-table.hh"
diff --git a/src/hb-ot-var-avar-table.hh b/src/hb-ot-var-avar-table.hh
index 7c8449a..ace0f5f 100644
--- a/src/hb-ot-var-avar-table.hh
+++ b/src/hb-ot-var-avar-table.hh
@@ -28,7 +28,6 @@
#define HB_OT_VAR_AVAR_TABLE_HH
#include "hb-open-type-private.hh"
-#include "hb-ot-var.h"
namespace OT {
diff --git a/src/hb-ot-var-fvar-table.hh b/src/hb-ot-var-fvar-table.hh
index 0c48769..9f6fb32 100644
--- a/src/hb-ot-var-fvar-table.hh
+++ b/src/hb-ot-var-fvar-table.hh
@@ -28,7 +28,6 @@
#define HB_OT_VAR_FVAR_TABLE_HH
#include "hb-open-type-private.hh"
-#include "hb-ot-var.h"
namespace OT {
diff --git a/src/hb-ot-var-hvar-table.hh b/src/hb-ot-var-hvar-table.hh
new file mode 100644
index 0000000..0cb24d2
--- /dev/null
+++ b/src/hb-ot-var-hvar-table.hh
@@ -0,0 +1,115 @@
+/*
+ * Copyright © 2017 Google, Inc.
+ *
+ * This is part of HarfBuzz, a text shaping library.
+ *
+ * Permission is hereby granted, without written agreement and without
+ * license or royalty fees, to use, copy, modify, and distribute this
+ * software and its documentation for any purpose, provided that the
+ * above copyright notice and the following two paragraphs appear in
+ * all copies of this software.
+ *
+ * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
+ * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
+ * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
+ * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ *
+ * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
+ * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
+ * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+ *
+ * Google Author(s): Behdad Esfahbod
+ */
+
+#ifndef HB_OT_VAR_HVAR_TABLE_HH
+#define HB_OT_VAR_HVAR_TABLE_HH
+
+#include "hb-ot-layout-common-private.hh"
+
+
+namespace OT {
+
+
+struct DeltaSetIndexMap
+{
+ inline bool sanitize (hb_sanitize_context_t *c) const
+ {
+ TRACE_SANITIZE (this);
+ return_trace (c->check_struct (this) &&
+ c->check_array (this, 1, 12));
+ }
+
+ USHORT x;
+ public:
+ DEFINE_SIZE_STATIC (2);
+};
+
+
+/*
+ * HVAR -- The Horizontal Metrics Variations Table
+ * VVAR -- The Vertical Metrics Variations Table
+ */
+
+#define HB_OT_TAG_HVAR HB_TAG('H','V','A','R')
+#define HB_OT_TAG_VVAR HB_TAG('V','V','A','R')
+
+struct HVARVVAR
+{
+ static const hb_tag_t HVARTag = HB_OT_TAG_hmtx;
+ static const hb_tag_t VVARTag = HB_OT_TAG_vmtx;
+
+ inline bool sanitize (hb_sanitize_context_t *c) const
+ {
+ TRACE_SANITIZE (this);
+ return_trace (version.sanitize (c) &&
+ likely (version.major == 1) &&
+ varStore.sanitize (c, this) &&
+ advMap.sanitize (c, this) &&
+ lsbMap.sanitize (c, this) &&
+ rsbMap.sanitize (c, this));
+ }
+
+ protected:
+ FixedVersion<>version; /* Version of the metrics variation table
+ * initially set to 0x00010000u */
+ LOffsetTo<VariationStore>
+ varStore; /* Offset to item variation store table. */
+ LOffsetTo<DeltaSetIndexMap>
+ advMap; /* Offset to advance var-idx mapping. */
+ LOffsetTo<DeltaSetIndexMap>
+ lsbMap; /* Offset to lsb/tsb var-idx mapping. */
+ LOffsetTo<DeltaSetIndexMap>
+ rsbMap; /* Offset to rsb/bsb var-idx mapping. */
+
+ public:
+ DEFINE_SIZE_STATIC (20);
+};
+
+struct HVAR : HVARVVAR {
+ static const hb_tag_t tableTag = HB_OT_TAG_HVAR;
+};
+struct VVAR : HVARVVAR {
+ static const hb_tag_t tableTag = HB_OT_TAG_VVAR;
+
+ inline bool sanitize (hb_sanitize_context_t *c) const
+ {
+ TRACE_SANITIZE (this);
+ return_trace (static_cast<const HVARVVAR *> (this)->sanitize (c) &&
+ vorgMap.sanitize (c, this));
+ }
+
+ protected:
+ LOffsetTo<DeltaSetIndexMap>
+ vorgMap; /* Offset to vertical-origin var-idx mapping. */
+
+ public:
+ DEFINE_SIZE_STATIC (24);
+};
+
+} /* namespace OT */
+
+
+#endif /* HB_OT_VAR_HVAR_TABLE_HH */
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