spot

$ spot -tGSUB=4 DroidSansFallbackFull.ttf
### [GSUB] (003c08e4)
Version    =1.0 (00010000)
ScriptList =000a
FeatureList=0030
LookupList =0044
--- ScriptList (000a)
ScriptCount=2
--- ScriptRecord[index]={ScriptTag,Script}
[0]={hani,000e} [1]={latn,001a} 
--- Script [0] (000e)
DefaultLangSys=0004
LangSysCount  =0

--- LangSys [-1] (0004)
LookupOrder    =0000
ReqFeatureIndex=65535
FeatureCount   =1
--- FeatureIndex[index]=value
[0]=0 
--- Script [1] (001a)
DefaultLangSys=0004
LangSysCount  =0

--- LangSys [-1] (0004)
LookupOrder    =0000
ReqFeatureIndex=65535
FeatureCount   =1
--- FeatureIndex[index]=value
[0]=1 

--- FeatureList (0030)
FeatureCount=2
--- FeatureRecord[index]={FeatureTag,Feature}
[0]={'vert',000e} [1]={'vert',000e} 
--- FeatureTable (000e)
FeatureParam=0000
--- FeatureTable (000e)
FeatureParam=0000
--- LookupList (0044)
LookupCount=1
--- Lookup[index]=offset
[0]=0004 
--- Lookup [0] (0004)
LookupType   =0007
LookupFlag   =0000
SubTableCount=1
--- SubTable[index]=offset
[0]=0008 
--- Subtable [0] (00000008)
--- ExtensionSubst
SubstFormat = 1
LookupType  = 1
Offset      = 00000008
--- Subtable [0] (00000010)
--- SingleSubst
SubstFormat=2
Coverage   =0034
GlyphCount =23
--- Substitute[index]=glyphId glyphName/CID
[0]=38538 (38538@38538) [1]=38539 (38539@38539) [2]=38542 (38542@38542) [3]=38543 (38543@38543) [4]=38544 (38544@38544) [5]=38545 (38545@38545) [6]=38546 (38546@38546) [7]=38547 (38547@38547) [8]=38548 (38548@38548) [9]=38549 (38549@38549) [10]=38550 (38550@38550) [11]=38551 (38551@38551) [12]=38552 (38552@38552) [13]=38553 (38553@38553) [14]=38554 (38554@38554) [15]=38585 (38585@38585) [16]=38586 (38586@38586) [17]=38587 (38587@38587) [18]=38555 (38555@38555) [19]=38556 (38556@38556) [20]=38588 (38588@38588) [21]=38557 (38557@38557) [22]=38558 (38558@38558) 
--- Coverage (0034)
CoverageFormat=2
RangeCount    =6
--- RangeRecord[index]={glyphId glyphName/CID, ....}
StartCoverageIndex= 0
[0]={ 81 (81@81)  82 (82@82)  }
StartCoverageIndex= 2
[1]={ 87 (87@87)  88 (88@88)  89 (89@89)  90 (90@90)  91 (91@91)  92 (92@92)  93 (93@93)  94 (94@94)  }
StartCoverageIndex= 10
[2]={ 96 (96@96)  97 (97@97)  98 (98@98)  99 (99@99)  100 (100@100)  101 (101@101)  102 (102@102)  103 (103@103)  104 (104@104)  }
StartCoverageIndex= 19
[3]={ 106 (106@106)  }
StartCoverageIndex= 20
[4]={ 206 (206@206)  }
StartCoverageIndex= 21
[5]={ 293 (293@293)  294 (294@294)  }