src/hb-aat-layout-kerx-table.hh | 298 ++++++++++++++++------------------------
src/hb-ot-colr-table.hh | 27 ++-
src/hb-ot-cpal-table.hh | 14 -
3 files changed, 148 insertions(+), 191 deletions(-)
New commits:
commit b73a5a1c240478616827529c94f0133018f9f790
Author: Ebrahim Byagowi <ebra...@gnu.org>
Date: Fri Mar 2 00:07:26 2018 +0330
[aat/kerx] Make parsing of the table actually work (#850)
diff --git a/src/hb-aat-layout-kerx-table.hh b/src/hb-aat-layout-kerx-table.hh
index 505e5084..b3c6a11d 100644
--- a/src/hb-aat-layout-kerx-table.hh
+++ b/src/hb-aat-layout-kerx-table.hh
@@ -1,6 +1,6 @@
/*
- * Copyright © 2018 Google, Inc.
* Copyright © 2018 Ebrahim Byagowi
+ * Copyright © 2018 Google, Inc.
*
* This is part of HarfBuzz, a text shaping library.
*
@@ -28,35 +28,19 @@
#ifndef HB_AAT_LAYOUT_KERX_TABLE_HH
#define HB_AAT_LAYOUT_KERX_TABLE_HH
+#include "hb-open-type-private.hh"
#include "hb-aat-layout-common-private.hh"
-namespace AAT {
+#define HB_AAT_TAG_KERX HB_TAG('k','e','r','x')
-/*
- * kerx -- Kerning
- */
+namespace AAT {
-#define HB_AAT_TAG_kerx HB_TAG('k','e','r','x')
+using namespace OT;
-struct hb_glyph_pair_t
-{
- hb_codepoint_t left;
- hb_codepoint_t right;
-};
-struct KerxPair
+struct KerxFormat0Records
{
- inline int get_kerning (void) const
- { return value; }
-
- inline int cmp (const hb_glyph_pair_t &o) const
- {
- int ret = left.cmp (o.left);
- if (ret) return ret;
- return right.cmp (o.right);
- }
-
inline bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
@@ -67,59 +51,60 @@ struct KerxPair
GlyphID left;
GlyphID right;
FWORD value;
- HBUINT16 pad;
public:
- DEFINE_SIZE_STATIC (8);
+ DEFINE_SIZE_STATIC (6);
};
struct KerxSubTableFormat0
{
- inline int get_kerning (hb_codepoint_t left, hb_codepoint_t right) const
- {
- //hb_glyph_pair_t pair = {left, right};
- //int i = pairs.bsearch (pair);
- //if (i == -1)
- return 0;
- //return pairs[i].get_kerning ();
- }
+ // TODO(ebraminio) Enable when we got suitable BinSearchArrayOf
+ // inline int get_kerning (hb_codepoint_t left, hb_codepoint_t right) const
+ // {
+ // hb_glyph_pair_t pair = {left, right};
+ // int i = pairs.bsearch (pair);
+ // if (i == -1)
+ // return 0;
+ // return pairs[i].get_kerning ();
+ // }
inline bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
- return_trace (pairs.sanitize (c));
+ return_trace (c->check_struct (this) &&
+ c->check_array (records, records[0].static_size, nPairs));
}
protected:
- BinSearchArrayOf<KerxPair> pairs; /* Array of kerning pairs. */
- //FIXME: BinSearchArrayOf and its BinSearchHeader should be
- //modified in a way to accept uint32s
+ // TODO(ebraminio): A custom version of "BinSearchArrayOf<KerxPair> pairs;"
is
+ // needed here to use HBUINT32 instead
+ HBUINT32 nPairs; /* The number of kerning pairs in this subtable */
+ HBUINT32 searchRange; /* The largest power of two less than or equal to the
value of nPairs,
+ * multiplied by the size in bytes of an entry in the
subtable. */
+ HBUINT32 entrySelector; /* This is calculated as log2 of the largest power
of two less
+ * than or equal to the value of nPairs. */
+ HBUINT32 rangeShift; /* The value of nPairs minus the largest power of two
less than or equal to nPairs. */
+ KerxFormat0Records records[VAR]; /* VAR=nPairs */
public:
- //DEFINE_SIZE_ARRAY (16, pairs);
-};
-
-struct KerxAction
-{
- HBUINT16 index;
+ DEFINE_SIZE_ARRAY (16, records);
};
struct KerxSubTableFormat1
{
inline bool sanitize (hb_sanitize_context_t *c) const
{
- //TRACE_SANITIZE (this);
- //return_trace (stateHeader.sanitize (c));
- return false;
+ TRACE_SANITIZE (this);
+ return_trace (c->check_struct (this) &&
+ stateHeader.sanitize (c));
}
protected:
- StateTable<KerxAction> stateHeader;
- OffsetTo<ArrayOf<HBUINT16>, HBUINT32> valueTable;
-
+ StateTable<HBUINT16> stateHeader;
+ LOffsetTo<ArrayOf<HBUINT16> > valueTable;
public:
- //DEFINE_SIZE_MIN (4);
+ DEFINE_SIZE_STATIC (20);
};
-//FIXME: Maybe this can be replaced with Lookup<HBUINT16>?
+// TODO(ebraminio): Maybe this can be replaced with Lookup<HBUINT16>?
struct KerxClassTable
{
inline unsigned int get_class (hb_codepoint_t g) const { return classes[g -
firstGlyph]; }
@@ -156,7 +141,8 @@ struct KerxSubTableFormat2
inline bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
- return_trace (rowWidth.sanitize (c) &&
+ return_trace (c->check_struct (this) &&
+ rowWidth.sanitize (c) &&
leftClassTable.sanitize (c, this) &&
rightClassTable.sanitize (c, this) &&
array.sanitize (c, this));
@@ -174,7 +160,7 @@ struct KerxSubTableFormat2
array; /* Offset from beginning of this subtable to
* the start of the kerning array. */
public:
- DEFINE_SIZE_MIN (16);
+ DEFINE_SIZE_STATIC (16);
};
struct KerxSubTableFormat4
@@ -182,7 +168,8 @@ struct KerxSubTableFormat4
inline bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
- return_trace (rowWidth.sanitize (c) &&
+ return_trace (c->check_struct (this) &&
+ rowWidth.sanitize (c) &&
leftClassTable.sanitize (c, this) &&
rightClassTable.sanitize (c, this) &&
array.sanitize (c, this));
@@ -200,182 +187,145 @@ struct KerxSubTableFormat4
array; /* Offset from beginning of this subtable to
* the start of the kerning array. */
public:
- DEFINE_SIZE_MIN (16);
+ DEFINE_SIZE_STATIC (16);
};
struct KerxSubTableFormat6
{
inline bool sanitize (hb_sanitize_context_t *c) const
{
- //TRACE_SANITIZE (this);
- //return_trace ;
- return false;
+ TRACE_SANITIZE (this);
+ return_trace (c->check_struct (this));
}
protected:
- HBUINT32 flags;
- HBUINT16 rowCount;
- HBUINT16 columnCount;
- HBUINT32 rowIndexTableOffset;
- HBUINT32 columnIndexTableOffset;
- HBUINT32 kerningArrayOffset;
- HBUINT32 kerningVectorOffset;
-
+ HBUINT32 flags;
+ HBUINT16 rowCount;
+ HBUINT16 columnCount;
+ HBUINT32 rowIndexTableOffset;
+ HBUINT32 columnIndexTableOffset;
+ HBUINT32 kerningArrayOffset;
+ HBUINT32 kerningVectorOffset;
public:
- DEFINE_SIZE_MIN (24);
+ DEFINE_SIZE_STATIC (24);
};
-struct KerxSubTable
+enum coverage_flags_t
{
- inline int get_kerning (hb_codepoint_t left, hb_codepoint_t right, const
char *end, unsigned int format) const
+ COVERAGE_VERTICAL_FLAG = 0x80u,
+ COVERAGE_CROSSSTREAM_FLAG = 0x40u,
+ COVERAGE_VARIATION_FLAG = 0x20u,
+ COVERAGE_PROCESS_DIRECTION = 0x10u,
+};
+
+struct KerxTable
+{
+ inline bool apply (hb_aat_apply_context_t *c, const AAT::ankr *ankr) const
{
- switch (format) {
- case 0: return u.format0.get_kerning (left, right);
- case 2: return u.format2.get_kerning (left, right, end);
- default:return 0;
- }
+ TRACE_APPLY (this);
+ /* TODO */
+ return_trace (false);
}
- inline bool sanitize (hb_sanitize_context_t *c, unsigned int format) const
+ inline unsigned int get_size (void) const { return length; }
+
+ inline bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
+ if (!c->check_struct (this))
+ return_trace (false);
+
switch (format) {
- case 0: return_trace (u.format0.sanitize (c));
- case 2: return_trace (u.format2.sanitize (c));
- default:return_trace (true);
+ case 0: return u.format0.sanitize (c);
+ case 1: return u.format1.sanitize (c);
+ case 2: return u.format2.sanitize (c);
+ case 4: return u.format4.sanitize (c);
+ case 6: return u.format6.sanitize (c);
+ default:return_trace (false);
}
}
- protected:
+protected:
+ HBUINT32 length;
+ HBUINT8 coverage;
+ HBUINT16 unused;
+ HBUINT8 format;
+ HBUINT32 tupleIndex;
union {
KerxSubTableFormat0 format0;
+ KerxSubTableFormat1 format1;
KerxSubTableFormat2 format2;
KerxSubTableFormat4 format4;
KerxSubTableFormat6 format6;
} u;
- public:
- DEFINE_SIZE_MIN (0);
+public:
+ DEFINE_SIZE_MIN (12);
};
+struct SubtableGlyphCoverageArray
+{
+ inline bool sanitize (hb_sanitize_context_t *c) const
+ {
+ TRACE_SANITIZE (this);
+ return_trace (c->check_struct (this));
+ }
+ protected:
+ HBUINT32 length;
+ HBUINT32 coverage;
+ HBUINT32 tupleCount;
+ public:
+ DEFINE_SIZE_STATIC (12);
+};
struct kerx
{
- static const hb_tag_t tableTag = HB_AAT_TAG_kerx;
+ static const hb_tag_t tableTag = HB_AAT_TAG_KERX;
inline bool apply (hb_aat_apply_context_t *c, const AAT::ankr *ankr) const
{
TRACE_APPLY (this);
- /* TODO */
- return_trace (false);
+ const KerxTable &table = StructAfter<KerxTable> (*this);
+ return_trace (table.apply (c, ankr));
}
- struct SubTableWrapper
+ inline bool sanitize (hb_sanitize_context_t *c) const
{
- enum coverage_flags_t {
- COVERAGE_VERTICAL_FLAG = 0x8000u,
- COVERAGE_CROSSSTREAM_FLAG = 0x4000u,
- COVERAGE_VARIATION_FLAG = 0x2000u,
-
- COVERAGE_OVERRIDE_FLAG = 0x0000u, /* Not supported. */
-
- COVERAGE_CHECK_FLAGS = 0x0700u, //FIXME: Where these two come from?
- COVERAGE_CHECK_HORIZONTAL = 0x0100u
- };
-
- protected:
- HBUINT32 length; /* Length of the subtable (including this
header). */
- HBUINT16 coverage; /* Coverage bits. */
- HBUINT16 format; /* Subtable format. */
- HBUINT32 tupleIndex; /* The tuple index (used for variations fonts).
- * This value specifies which tuple this
subtable covers. */
- KerxSubTable subtable; /* Subtable data. */
- public:
- inline bool is_horizontal (void) const
- { return (coverage & COVERAGE_CHECK_FLAGS) == COVERAGE_CHECK_HORIZONTAL; }
-
- inline bool is_override (void) const
- { return bool (coverage & COVERAGE_OVERRIDE_FLAG); }
-
- inline int get_kerning (hb_codepoint_t left, hb_codepoint_t right, const
char *end) const
- { return subtable.get_kerning (left, right, end, format); }
-
- inline int get_h_kerning (hb_codepoint_t left, hb_codepoint_t right, const
char *end) const
- { return is_horizontal () ? get_kerning (left, right, end) : 0; }
+ TRACE_SANITIZE (this);
+ if (!(c->check_struct (this)))
+ return_trace (false);
- inline unsigned int get_size (void) const { return length; }
+ const KerxTable *table = &StructAfter<KerxTable> (*this);
+ if (!(table->sanitize (c)))
+ return_trace (false);
- inline bool sanitize (hb_sanitize_context_t *c) const
+ for (unsigned int i = 0; i < nTables - 1; ++i)
{
- TRACE_SANITIZE (this);
- return_trace (c->check_struct (this) &&
- length >= min_size &&
- c->check_array (this, 1, length) &&
- subtable.sanitize (c, format));
+ table = &StructAfter<KerxTable> (*table);
+ if (!(table->sanitize (c)))
+ return_trace (false);
}
- DEFINE_SIZE_MIN (12);
- };
- inline int get_h_kerning (hb_codepoint_t left, hb_codepoint_t right,
unsigned int table_length) const
- {
- int v = 0;
- const SubTableWrapper *st = (SubTableWrapper *) data;
- unsigned int count = nTables;
- for (unsigned int i = 0; i < count; i++)
- {
- if (st->is_override ())
- v = 0;
- v += st->get_h_kerning (left, right, table_length + (const char *) this);
- st = (SubTableWrapper *) st;
- }
- return v;
- }
+ // If version is less than 3, we are done here; otherwise better to check
footer also
+ if (version < 3)
+ return_trace (true);
- inline bool sanitize (hb_sanitize_context_t *c) const
- {
- TRACE_SANITIZE (this);
- const SubTableWrapper *st = (SubTableWrapper *) data;
- unsigned int count = nTables;
- for (unsigned int i = 0; i < count; i++)
- {
- if (unlikely (!st->sanitize (c)))
- return_trace (false);
- st = (SubTableWrapper *) st;
- }
+ // TODO: Investigate why this just work on some fonts no matter of version
+ // const SubtableGlyphCoverageArray &footer =
+ // StructAfter<SubtableGlyphCoverageArray> (*table);
+ // return_trace (footer.sanitize (c));
return_trace (true);
}
- struct accelerator_t
- {
- inline void init (hb_face_t *face)
- {
- blob = Sanitizer<kerx>().sanitize (face->reference_table
(HB_AAT_TAG_kerx));
- table = Sanitizer<kerx>::lock_instance (blob);
- table_length = hb_blob_get_length (blob);
- }
- inline void fini (void)
- {
- hb_blob_destroy (blob);
- }
-
- inline int get_h_kerning (hb_codepoint_t left, hb_codepoint_t right) const
- { return table->get_h_kerning (left, right, table_length); }
-
- private:
- hb_blob_t *blob;
- const kerx *table;
- unsigned int table_length;
- };
-
protected:
HBUINT16 version;
HBUINT16 padding;
- HBUINT32 nTables; /* Number of subtables in the kerning
table. */
- HBUINT8 data[VAR];
- //ArrayOf<GlyphCoverageArray> subtableGlyphCoverageArray;
+ HBUINT32 nTables;
+/*KerxTable tables[VAR];*/
+/*SubtableGlyphCoverageArray coverage_array;*/
public:
- DEFINE_SIZE_ARRAY (8, data);
+ DEFINE_SIZE_STATIC (8);
};
} /* namespace AAT */
commit a570edcde2f89e59b5ccd4867a8c0eed084bf35d
Author: Ebrahim Byagowi <ebra...@gnu.org>
Date: Fri Mar 2 00:06:03 2018 +0330
[COLR] Sanitize BaseGlyphRecord (#854)
diff --git a/src/hb-ot-colr-table.hh b/src/hb-ot-colr-table.hh
index c5bc2ccb..08a39a99 100644
--- a/src/hb-ot-colr-table.hh
+++ b/src/hb-ot-colr-table.hh
@@ -42,10 +42,10 @@ struct LayerRecord
inline bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
- return_trace (true);
+ return_trace (c->check_struct (this));
}
- HBUINT16 gID; /* Glyph ID of layer glyph */
+ GlyphID gID; /* Glyph ID of layer glyph */
HBUINT16 paletteIndex; /* Index value to use with a selected color
palette */
public:
DEFINE_SIZE_STATIC (4);
@@ -53,13 +53,15 @@ struct LayerRecord
struct BaseGlyphRecord
{
- inline bool sanitize (hb_sanitize_context_t *c, unsigned int palettes) const
+ inline bool sanitize (hb_sanitize_context_t *c, const void *base) const
{
TRACE_SANITIZE (this);
- return_trace (c->check_struct (this));
+ return_trace (c->check_struct (this) &&
+ firstLayerIndex.sanitize (c, base) &&
+ c->check_array ((const void*) &firstLayerIndex, sizeof (LayerRecord),
numLayers));
}
- HBUINT16 gID; /* Glyph ID of reference glyph */
+ GlyphID gID; /* Glyph ID of reference glyph */
OffsetTo<LayerRecord>
firstLayerIndex; /* Index to the layer record */
HBUINT16 numLayers; /* Number of color layers associated with this
glyph */
@@ -74,9 +76,17 @@ struct COLR
inline bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
- return_trace (c->check_struct (this) &&
- c->check_array ((const void*) &baseGlyphRecords, sizeof
(BaseGlyphRecord), numBaseGlyphRecords) &&
- c->check_array ((const void*) &layerRecordsOffset, sizeof
(LayerRecord), numLayerRecords));
+ if (!(c->check_struct (this) &&
+ c->check_array ((const void*) &baseGlyphRecords, sizeof
(BaseGlyphRecord), numBaseGlyphRecords) &&
+ c->check_array ((const void*) &layerRecordsOffset, sizeof (LayerRecord),
numLayerRecords)))
+ return_trace (false);
+
+ const BaseGlyphRecord *base_glyph_records = &baseGlyphRecords (this);
+ for (unsigned int i = 0; i < numBaseGlyphRecords; ++i)
+ if (!(base_glyph_records[i].sanitize (c, this)))
+ return_trace (false);
+
+ return_trace (true);
}
protected:
@@ -87,7 +97,6 @@ struct COLR
LOffsetTo<LayerRecord>
layerRecordsOffset; /* Offset to Layer Records */
HBUINT16 numLayerRecords; /* Number of Layer Records */
-
public:
DEFINE_SIZE_STATIC (14);
};
commit 7e958646a4a825bfe3aac56ddb96100d68c5592c
Author: Ebrahim Byagowi <ebra...@gnu.org>
Date: Thu Mar 1 10:27:18 2018 +0330
[CPAL] Fix version checking logic on sanitizer (#851)
diff --git a/src/hb-ot-cpal-table.hh b/src/hb-ot-cpal-table.hh
index aade0e73..740a94b3 100644
--- a/src/hb-ot-cpal-table.hh
+++ b/src/hb-ot-cpal-table.hh
@@ -89,7 +89,6 @@ struct CPALV1Tail
LOffsetTo<HBUINT32> paletteFlags;
LOffsetTo<HBUINT16> paletteLabel;
LOffsetTo<HBUINT16> paletteEntryLabel;
-
public:
DEFINE_SIZE_STATIC (12);
};
@@ -113,13 +112,12 @@ struct CPAL
if (colorRecordIndices[i] + numPaletteEntries > colorRecords.get_size ())
return_trace (false);
- if (version > 1)
- {
- const CPALV1Tail &v1 = StructAfter<CPALV1Tail> (*this);
- return_trace (v1.sanitize (c, palettes));
- }
- else
+ // If version is zero, we are done here; otherwise we need to check tail
also
+ if (version == 0)
return_trace (true);
+
+ const CPALV1Tail &v1 = StructAfter<CPALV1Tail> (*this);
+ return_trace (v1.sanitize (c, palettes));
}
inline unsigned int get_size (void) const
@@ -158,7 +156,7 @@ struct CPAL
HBUINT16 numPalettes;
ArrayOf<ColorRecord> colorRecords;
HBUINT16 colorRecordIndices[VAR]; // VAR=numPalettes
-
+/*CPALV1Tail v1[VAR];*/
public:
DEFINE_SIZE_ARRAY (12, colorRecordIndices);
};
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