FreeType

https://www.freetype.org/

FreeType is a freely available software library to render fonts.

Fuzzing

This subproject has two main purposes:

• OSS-Fuzz: Provide the source code and build scripts for the fuzz targets.
• Travis CI: Provide settings, source code, and build scripts for the regression test suite.

Fuzzed API

The following tables provide an overview over currently fuzzed and unfuzzed parts of FreeType's API. Columns have the following meaning:

• Function: The name of an API function.
• Module: The name of a module when set via FT_Property_Set.
• Property: The name of a property when set via FT_Property_Set.
• Used: A function is used at least once, by one fuzz target.
• Extensively: A function is used in (almost) every way possible and it is up the fuzzer to find inputs that fully test it.
• Resources: Some important resources that a function uses. This list is by no means complete. It merely highlights important shared resources that carry over from one function to another.
• Alias: Other functions that do exactly the same.
• Calls: Other API functions that a function calls. Used to track down implicitely used API functions.
• Called by: Other API functions that call a function. Used to track down implicitely used API functions.

FreeType Version

https://www.freetype.org/freetype2/docs/reference/ft2-version.html

	Function	Used	Extensively	Resources
1.1.1	FT_Library_Version	:heavy_check_mark:	:heavy_check_mark:	Library
1.1.2	FT_Face_CheckTrueTypePatents	:heavy_check_mark:	:heavy_check_mark:	Face
1.1.3	FT_Face_SetUnpatentedHinting	:heavy_check_mark:	:heavy_check_mark:	Face

Base Interface

https://www.freetype.org/freetype2/docs/reference/ft2-base_interface.html

	Function	Used	Extensively	Resources
2.1.1	FT_Init_FreeType	:heavy_check_mark:	:heavy_check_mark:
2.1.2	FT_Done_FreeType	:heavy_check_mark:	:heavy_check_mark:	Library

	Function	Used	Extensively	Resources	Calls	Called by
2.2.1	FT_New_Face			Library File Path
2.2.2	FT_Done_Face	:heavy_check_mark:	:heavy_check_mark:	Face	6.1.1
2.2.3	FT_Reference_Face			Face
2.2.4	FT_New_Memory_Face	:heavy_check_mark:	:heavy_check_mark:	Library Bytes	2.2.6
2.2.5	FT_Face_Properties			Face
2.2.6	FT_Open_Face	:heavy_check_mark:	:heavy_check_mark:	Library	6.1.2	2.2.4 2.2.8
2.2.7	FT_Attach_File			Face File Path
2.2.8	FT_Attach_Stream	:heavy_check_mark:	:heavy_check_mark:	Face Bytes	2.2.6

	Function	Used	Extensively	Resources	Calls	Called by
2.3.1	FT_Set_Char_Size	:heavy_check_mark:	:heavy_check_mark:	Face	2.3.3
2.3.2	FT_Set_Pixel_Sizes	:heavy_check_mark:	:heavy_check_mark:	Face
2.3.3	FT_Request_Size	:heavy_check_mark:	:heavy_check_mark:	Face		2.3.1
2.3.4	FT_Select_Size	:heavy_check_mark:	:heavy_check_mark:	Face
2.3.5	FT_Set_Transform	:heavy_check_mark:	:heavy_check_mark:	Face

	Function	Used	Extensively	Resources	Calls	Called by
2.4.1	FT_Load_Glyph	:heavy_check_mark:	:heavy_check_mark:	Face Glyph Index Load Flags	2.5.1	2.4.6
2.4.2	FT_Get_Char_Index	:heavy_check_mark:	:heavy_check_mark:	Face Char Code		2.4.6
2.4.3	FT_Get_First_Char	:heavy_check_mark:	:heavy_check_mark:	Face
2.4.4	FT_Get_Next_Char	:heavy_check_mark:	:heavy_check_mark:	Face Char Code
2.4.5	FT_Get_Name_Index	:heavy_check_mark:	:heavy_check_mark:	Face
2.4.6	FT_Load_Char	:heavy_check_mark:	:heavy_check_mark:	Face Char Code Load Flags	2.4.1 2.4.2

	Function	Used	Extensively	Resources	Called by
2.5.1	FT_Render_Glyph	:heavy_check_mark:	:heavy_check_mark:	Glyph Slot	2.4.1

	Function	Used	Extensively	Resources
2.6.1	FT_Get_Kerning	:heavy_check_mark:	:heavy_check_mark:	Face 2x Glyph Index
2.6.2	FT_Get_Track_Kerning	:heavy_check_mark:	:heavy_check_mark:	Face

	Function	Used	Extensively	Resources
2.7.1	FT_Get_Glyph_Name	:heavy_check_mark:	:heavy_check_mark:	Face Glyph Index
2.7.2	FT_Get_Postscript_Name	:heavy_check_mark:	:heavy_check_mark:	Face

	Function	Used	Extensively	Resources
2.8.1	FT_Select_Charmap	:heavy_check_mark:	:heavy_check_mark:	Face
2.8.2	FT_Set_Charmap	:heavy_check_mark:	:heavy_check_mark:	Face Char Map
2.8.3	FT_Get_Charmap_Index	:heavy_check_mark:	:heavy_check_mark:	Face Char Map

	Function	Used	Extensively	Resources
2.9.1	FT_Get_FSType_Flags	:heavy_check_mark:	:heavy_check_mark:	Face
2.9.2	FT_Get_SubGlyph_Info			Glyph Slot Subglyph Index

Unicode Variation Sequences

https://www.freetype.org/freetype2/docs/reference/ft2-glyph_variants.html

	Function	Used	Extensively	Resources
3.1.1	FT_Face_GetCharVariantIndex	:heavy_check_mark:	:heavy_check_mark:	Face Char Code Var Selector
3.1.2	FT_Face_GetCharVariantIsDefault	:heavy_check_mark:	:heavy_check_mark:	Face Char Code Var Selector
3.1.3	FT_Face_GetVariantSelectors	:heavy_check_mark:	:heavy_check_mark:	Face
3.1.4	FT_Face_GetVariantsOfChar	:heavy_check_mark:	:heavy_check_mark:	Face Char Code
3.1.5	FT_Face_GetCharsOfVariant	:heavy_check_mark:	:heavy_check_mark:	Face Var Selector

Glyph Management

https://www.freetype.org/freetype2/docs/reference/ft2-glyph_management.html

	Function	Used	Extensively	Resources
4.1.1	FT_Get_Glyph	:heavy_check_mark:	:heavy_check_mark:	Glyph Slot
4.1.2	FT_Glyph_Copy	:heavy_check_mark:	:heavy_check_mark:	Glyph
4.1.3	FT_Glyph_Transform	:heavy_check_mark:	:heavy_check_mark:	Glyph
4.1.4	FT_Glyph_Get_CBox	:heavy_check_mark:	:heavy_check_mark:	Glyph
4.1.5	FT_Glyph_To_Bitmap	:heavy_check_mark:	:heavy_check_mark:	Glyph
4.1.6	FT_Done_Glyph	:heavy_check_mark:	:heavy_check_mark:	Glyph

Mac Specific Interface

https://www.freetype.org/freetype2/docs/reference/ft2-mac_specific.html

	Function	Used	Extensively
5.1.1	FT_New_Face_From_FOND
5.1.2	FT_GetFile_From_Mac_Name
5.1.3	FT_GetFile_From_Mac_ATS_Name
5.1.4	FT_GetFilePath_From_Mac_ATS_Name
5.1.5	FT_New_Face_From_FSSpec
5.1.6	FT_New_Face_From_FSRef

Size Management

https://www.freetype.org/freetype2/docs/reference/ft2-sizes_management.html

	Function	Used	Extensively	Resources	Called by
6.1.1	FT_New_Size	:heavy_check_mark:	:heavy_check_mark:	Face	2.2.6
6.1.2	FT_Done_Size	:heavy_check_mark:	:heavy_check_mark:	Size	2.2.2
6.1.3	FT_Activate_Size			Size

Multiple Masters

https://www.freetype.org/freetype2/docs/reference/ft2-multiple_masters.html

	Function	Used	Extensively	Resources	Alias
7.1.1	FT_Get_Multi_Master	:heavy_check_mark:	:heavy_check_mark:	Face
7.1.2	FT_Get_MM_Var	:heavy_check_mark:	:heavy_check_mark:	Face
7.1.3	FT_Done_MM_Var	:heavy_check_mark:	:heavy_check_mark:	Library MM Var
7.1.4	FT_Set_MM_Design_Coordinates	:heavy_check_mark:	:heavy_check_mark:	Face
7.1.5	FT_Set_Var_Design_Coordinates	:heavy_check_mark:	:heavy_check_mark:	Face
7.1.6	FT_Get_Var_Design_Coordinates	:heavy_check_mark:	:heavy_check_mark:	Face
7.1.7	FT_Set_MM_Blend_Coordinates	:heavy_check_mark:		Face	7.1.9
7.1.8	FT_Get_MM_Blend_Coordinates	:heavy_check_mark:	:heavy_check_mark:	Face	7.1.10
7.1.9	FT_Set_Var_Blend_Coordinates	:heavy_check_mark:		Face	7.1.7
7.1.10	FT_Get_Var_Blend_Coordinates	:heavy_check_mark:	:heavy_check_mark:	Face	7.1.8
7.1.11	FT_Get_Var_Axis_Flags	:heavy_check_mark:	:heavy_check_mark:	MM Var
7.1.12	FT_Set_Named_Instance	:heavy_check_mark:		Face

TrueType Tables

https://www.freetype.org/freetype2/docs/reference/ft2-truetype_tables.html

	Function	Used	Extensively	Resources
8.1.1	FT_Get_Sfnt_Table	:heavy_check_mark:	:heavy_check_mark:	Face
8.1.2	FT_Load_Sfnt_Table	:heavy_check_mark:		Face
8.1.3	FT_Sfnt_Table_Info	:heavy_check_mark:	:heavy_check_mark:	Face
8.1.4	FT_Get_CMap_Language_ID	:heavy_check_mark:	:heavy_check_mark:	Char Map
8.1.5	FT_Get_CMap_Format	:heavy_check_mark:	:heavy_check_mark:	Char Map

Type 1 Tables

https://www.freetype.org/freetype2/docs/reference/ft2-type1_tables.html

	Function	Used	Extensively	Resources
9.1.1	FT_Has_PS_Glyph_Names	:heavy_check_mark:	:heavy_check_mark:	Face
9.1.2	FT_Get_PS_Font_Info	:heavy_check_mark:	:heavy_check_mark:	Face
9.1.3	FT_Get_PS_Font_Private	:heavy_check_mark:	:heavy_check_mark:	Face
9.1.4	FT_Get_PS_Font_Value			Face

SFNT Names

https://www.freetype.org/freetype2/docs/reference/ft2-sfnt_names.html

	Function	Used	Extensively	Resources
10.1.1	FT_Get_Sfnt_Name_Count	:heavy_check_mark:	:heavy_check_mark:	Face
10.1.2	FT_Get_Sfnt_Name	:heavy_check_mark:	:heavy_check_mark:	Face
10.1.3	FT_Get_Sfnt_LangTag	:heavy_check_mark:	:heavy_check_mark:	Face

BDF and PCF Files

https://www.freetype.org/freetype2/docs/reference/ft2-bdf_fonts.html

	Function	Used	Extensively
11.1.1	FT_Get_BDF_Charset_ID
11.1.2	FT_Get_BDF_Property

CID Fonts

https://www.freetype.org/freetype2/docs/reference/ft2-cid_fonts.html

	Function	Used	Extensively	Resources
12.1.1	FT_Get_CID_Registry_Ordering_Supplement	:heavy_check_mark:	:heavy_check_mark:	Face
12.1.2	FT_Get_CID_Is_Internally_CID_Keyed	:heavy_check_mark:	:heavy_check_mark:	Face
12.1.3	FT_Get_CID_From_Glyph_Index	:heavy_check_mark:	:heavy_check_mark:	Face Glyph Index

PFR Fonts

https://www.freetype.org/freetype2/docs/reference/ft2-pfr_fonts.html

	Function	Used	Extensively
13.1.1	FT_Get_PFR_Metrics
13.1.2	FT_Get_PFR_Kerning
13.1.3	FT_Get_PFR_Advance

Window FNT Files

https://www.freetype.org/freetype2/docs/reference/ft2-winfnt_fonts.html

	Function	Used	Extensively
14.1.1	FT_Get_WinFNT_Header

Font Formats

https://www.freetype.org/freetype2/docs/reference/ft2-font_formats.html

	Function	Used	Extensively	Resources
15.1.1	FT_Get_Font_Format	:heavy_check_mark:	:heavy_check_mark:	Face

Gasp Table

https://www.freetype.org/freetype2/docs/reference/ft2-gasp_table.html

	Function	Used	Extensively	Resources
16.1.1	FT_Get_Gasp	:heavy_check_mark:	:heavy_check_mark:	Face

Driver Properties

https://www.freetype.org/freetype2/docs/reference/ft2-properties.html

	Module	Property	Used	Extensively
17.1.1	autofitter	darkening-parameters
17.1.2	autofitter	default-script
17.1.3	autofitter	fallback-script
17.1.4	autofitter	increase-x-height
17.1.5	autofitter	no-stem-darkening
17.1.6	autofitter	warping	:heavy_check_mark:	:heavy_check_mark:
17.1.7	cff	darkening-parameters
17.1.8	cff	hinting-engine
17.1.9	cff	no-stem-darkening
17.1.10	cff	random-seed
17.1.11	pcf	no-long-family-names
17.1.12	t1cid	darkening-parameters
17.1.13	t1cid	hinting-engine
17.1.14	t1cid	no-stem-darkening
17.1.15	t1cid	random-seed
17.1.16	truetype	interpreter-version	:heavy_check_mark:	:heavy_check_mark:
17.1.17	type1	darkening-parameters
17.1.18	type1	hinting-engine
17.1.19	type1	no-stem-darkening
17.1.20	type1	random-seed

Cache Sub-System

https://www.freetype.org/freetype2/docs/reference/ft2-cache_subsystem.html

	Function	Used	Extensively
18.1.1	FTC_Manager_New
18.1.2	FTC_Manager_Reset
18.1.3	FTC_Manager_Done
18.1.4	FTC_Manager_LookupFace
18.1.5	FTC_Manager_LookupSize
18.1.6	FTC_Manager_RemoveFaceID
18.1.7	FTC_Node_Unref
18.1.8	FTC_ImageCache_New
18.1.9	FTC_ImageCache_Lookup
18.1.10	FTC_SBitCache_New
18.1.11	FTC_SBitCache_Lookup
18.1.12	FTC_CMapCache_New
18.1.13	FTC_CMapCache_Lookup
18.1.14	FTC_ImageCache_LookupScaler
18.1.15	FTC_SBitCache_LookupScaler