[subset] sbix fix missed offset is_null() check
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@ -41,7 +41,8 @@ namespace OT {
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struct SBIXGlyph
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struct SBIXGlyph
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{
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{
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SBIXGlyph* copy (hb_serialize_context_t *c, unsigned int data_length) const {
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SBIXGlyph* copy (hb_serialize_context_t *c, unsigned int data_length) const
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{
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TRACE_SERIALIZE (this);
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TRACE_SERIALIZE (this);
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SBIXGlyph* new_glyph = c->start_embed<SBIXGlyph> ();
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SBIXGlyph* new_glyph = c->start_embed<SBIXGlyph> ();
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if (unlikely (!new_glyph)) return_trace (nullptr);
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if (unlikely (!new_glyph)) return_trace (nullptr);
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@ -152,7 +153,9 @@ struct SBIXStrike
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{
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{
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hb_codepoint_t old_gid;
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hb_codepoint_t old_gid;
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if (!c->plan->old_gid_for_new_gid (new_gid, &old_gid) ||
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if (!c->plan->old_gid_for_new_gid (new_gid, &old_gid) ||
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unlikely (imageOffsetsZ[old_gid + 1] <= imageOffsetsZ[old_gid] ||
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unlikely (imageOffsetsZ[old_gid].is_null() ||
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imageOffsetsZ[old_gid + 1].is_null () ||
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imageOffsetsZ[old_gid + 1] <= imageOffsetsZ[old_gid] ||
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imageOffsetsZ[old_gid + 1] - imageOffsetsZ[old_gid] <= SBIXGlyph::min_size) ||
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imageOffsetsZ[old_gid + 1] - imageOffsetsZ[old_gid] <= SBIXGlyph::min_size) ||
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(unsigned int) imageOffsetsZ[old_gid + 1] > available_len)
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(unsigned int) imageOffsetsZ[old_gid + 1] > available_len)
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{
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{
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