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[color] Use hb_array_t in CPAL

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Doesn't work though, ouch :(.  Need to figure out if it's unreasonable
to expect Null(T) inside hb_array_t<T> to see the later specialization
of Null for NameID.
This commit is contained in:
Behdad Esfahbod 2018-10-22 16:16:21 -07:00
parent 5ae18855d1
commit f3336580dd
3 changed files with 27 additions and 24 deletions
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3
src/hb-open-type.hh
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@ -150,7 +150,8 @@ struct Tag : HBUINT32
typedef HBUINT16 GlyphID;
/* Name-table index, same as uint16 (length = 16 bits) */
typedef HBUINT16 NameID;
struct NameID : HBUINT16 {};
DECLARE_NULL_NAMESPACE_BYTES (OT, NameID);
/* Script/language-system/feature index */
struct Index : HBUINT16 {

47
src/hb-ot-color-cpal-table.hh
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@ -53,10 +53,9 @@ struct CPALV1Tail
unsigned int palette_index,
unsigned int palette_count) const
{
if (unlikely (palette_index >= palette_count || !paletteFlagsZ))
return HB_OT_COLOR_PALETTE_FLAG_DEFAULT;
return (hb_ot_color_palette_flags_t) (uint32_t) (base+paletteFlagsZ)[palette_index];
if (!paletteFlagsZ) return HB_OT_COLOR_PALETTE_FLAG_DEFAULT;
return (hb_ot_color_palette_flags_t) (uint32_t)
hb_array_t<const HBUINT32> ((base+paletteFlagsZ).arrayZ, palette_count)[palette_index];
}
inline unsigned int
@ -64,10 +63,10 @@ struct CPALV1Tail
unsigned int palette_index,
unsigned int palette_count) const
{
if (unlikely (palette_index >= palette_count || !paletteLabelZ))
return HB_NAME_ID_INVALID;
return (base+paletteLabelZ)[palette_index];
/* XXX the Null(NameID) returned by hb_array_t is wrong. Figure out why
* and remove the explicit bound check. */
if (!paletteLabelsZ || palette_index >= palette_count) return HB_NAME_ID_INVALID;
return hb_array_t<const NameID> ((base+paletteLabelsZ).arrayZ, palette_count)[palette_index];
}
inline unsigned int
@ -75,21 +74,23 @@ struct CPALV1Tail
unsigned int color_index,
unsigned int color_count) const
{
if (unlikely (color_index >= color_count || !paletteEntryLabelZ))
return HB_NAME_ID_INVALID;
return (base+paletteEntryLabelZ)[color_index];
/* XXX the Null(NameID) returned by hb_array_t is wrong. Figure out why
* and remove the explicit bound check. */
if (!colorLabelsZ || color_index >= color_count) return HB_NAME_ID_INVALID;
return hb_array_t<const NameID> ((base+colorLabelsZ).arrayZ, color_count)[color_index];
}
public:
inline bool sanitize (hb_sanitize_context_t *c, const void *base,
unsigned int palette_count, unsigned int color_count) const
inline bool sanitize (hb_sanitize_context_t *c,
const void *base,
unsigned int palette_count,
unsigned int color_count) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this) &&
(!paletteFlagsZ || (base+paletteFlagsZ).sanitize (c, palette_count)) &&
(!paletteLabelZ || (base+paletteLabelZ).sanitize (c, palette_count)) &&
(!paletteEntryLabelZ || (base+paletteEntryLabelZ).sanitize (c, color_count)));
(!paletteFlagsZ || (base+paletteFlagsZ).sanitize (c, palette_count)) &&
(!paletteLabelsZ || (base+paletteLabelsZ).sanitize (c, palette_count)) &&
(!colorLabelsZ || (base+colorLabelsZ).sanitize (c, color_count)));
}
protected:
@ -97,13 +98,13 @@ struct CPALV1Tail
paletteFlagsZ; /* Offset from the beginning of CPAL table to
* the Palette Type Array. Set to 0 if no array
* is provided. */
LOffsetTo<UnsizedArrayOf<HBUINT16>, false>
paletteLabelZ; /* Offset from the beginning of CPAL table to
* the Palette Labels Array. Set to 0 if no
LOffsetTo<UnsizedArrayOf<NameID>, false>
paletteLabelsZ; /* Offset from the beginning of CPAL table to
* the palette labels array. Set to 0 if no
* array is provided. */
LOffsetTo<UnsizedArrayOf<HBUINT16>, false>
paletteEntryLabelZ; /* Offset from the beginning of CPAL table to
* the Palette Entry Label Array. Set to 0
LOffsetTo<UnsizedArrayOf<NameID>, false>
colorLabelsZ; /* Offset from the beginning of CPAL table to
* the color labels array. Set to 0
* if no array is provided. */
public:
DEFINE_SIZE_STATIC (12);

1
src/hb-static.cc
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@ -40,6 +40,7 @@
hb_vector_size_impl_t const _hb_NullPool[(HB_NULL_POOL_SIZE + sizeof (hb_vector_size_impl_t) - 1) / sizeof (hb_vector_size_impl_t)] = {};
/*thread_local*/ hb_vector_size_impl_t _hb_CrapPool[(HB_NULL_POOL_SIZE + sizeof (hb_vector_size_impl_t) - 1) / sizeof (hb_vector_size_impl_t)] = {};
DEFINE_NULL_NAMESPACE_BYTES (OT, NameID) = {0xFF,0xFF};
DEFINE_NULL_NAMESPACE_BYTES (OT, Index) = {0xFF,0xFF};
DEFINE_NULL_NAMESPACE_BYTES (OT, LangSys) = {0x00,0x00, 0xFF,0xFF, 0x00,0x00};
DEFINE_NULL_NAMESPACE_BYTES (OT, RangeRecord) = {0x00,0x01, 0x00,0x00, 0x00, 0x00};