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Cmap Products Cmap products empowers users to construct, navigate, share and criticize knowledge models represented as concept maps. View Products. Learn About Concept Maps Concept maps are graphical tools for organizing and representing knowledge in an organized fashion.

Learn More. With the introduction of supplementary planes in Unicode 2. To accommodate this, three additional formats were added — formats 8, 10 and 12 — that allow for bit encoding schemes. Other enhancements in Unicode led to the addition of other subtable formats. Subtable format 14 provides a unified mechanism for supporting Unicode variation sequences.

Of the seven available formats, not all are commonly used today. Formats 4 or 12 are appropriate for most new fonts, depending on the Unicode character repertoire supported. Format 14 is used in many applications for support of Unicode variation sequences. Some platforms also make use for format 13 for a last-resort fallback font.

Other subtable formats are not recommended for use in new fonts. Application developers, however, should anticipate that any of the formats may be used in fonts. Note: The ‘cmap’ table version number remains at 0x for fonts that make use of the newer subtable formats. The array of encoding records specifies particular encodings and the offset to the subtable for each encoding. The platform ID and platform-specific encoding ID in the encoding record are used to specify a particular character encoding.

In the case of the Macintosh platform, a language field within the mapping subtable is also used for this purpose. The encoding record entries in the ‘cmap’ header must be sorted first by platform ID, then by platform-specific encoding ID, and then by the language field in the corresponding subtable. Each platform ID, platform-specific encoding ID, and subtable language combination may appear only once in the ‘cmap’ table.

Apart from a format 14 subtable, all other subtables are exclusive: applications should select and use one and ignore the others. If a font includes Unicode subtables for both bit encoding typically, format 4 and also bit encoding formats 10 or 12 , then the characters supported by the subtable for bit encoding should be a superset of the characters supported by the subtable for bit encoding, and the bit encoding should be used by applications.

Fonts should not include bit Unicode subtables using both format 4 and format 6; format 4 should be used. Similarly, fonts should not include bit Unicode subtables using both format 10 and format 12; format 12 should be used. If a font includes encoding records for Unicode subtables of the same format but with different platform IDs, an application may choose which to select, but should make this selection consistently each time the font is used.

Platform ID values through are reserved for user-defined platforms. This specification will never assign these values to a registered platform. Encoding ID 3 should be used in conjunction with ‘cmap’ subtable formats 4 or 6.

Encoding ID 4 should be used in conjunction with subtable formats 10 or Unicode Variation Sequences supported by the font should be specified in the ‘cmap’ table using a format 14 subtable.

A format 14 subtable must only be used under platform ID 0 and encoding ID 5; and encoding ID 5 should only be used with a format 14 subtable. Encoding ID 6 should only be used in conjunction with ‘cmap’ subtable format 13; and subtable format 13 should only be used under platform ID 0 and encoding ID 6. Older Macintosh versions required fonts to have a ‘cmap’ subtable for platform ID 1. For current Apple platforms, use of platform ID 1 is discouraged.

See the ‘name’ table chapter for details regarding encoding IDs defined for the Macintosh platform. The Windows platform supports several encodings.

See below for additional details. This encoding must not be used to support Unicode supplementary-plane characters. The symbol encoding was created to support fonts with arbitrary ornaments or symbols not supported in Unicode or other standard encodings.

A format 4 subtable would be used, typically with up to graphic characters assigned at code positions beginning with 0xF In new fonts, symbols or characters not in Unicode should be encoded using PUA code points in a Unicode ‘cmap’ subtable. See the Recommendations chapter for additional information. Platform ID 4 is a legacy platform that was created to provide compatibility of older applications with OpenType fonts that had been adapted from older Type 1 fonts.

This platform is not commonly used today, and should not be used in new fonts. This ‘cmap’ platform provides a compatibility mechanism for non-Unicode applications that use the font as if it were Windows ANSI encoded.

Adobe provides this compatibility ‘cmap’ encoding in every OpenType font converted from a Type1 font in which the Encoding is not StandardEncoding. When platform ID 4 is used, the encoding ID must be set to the Windows charset value in the range 0 to , inclusive present in the.

PFM file of the original Type 1 font. The language field must be set to zero for all ‘cmap’ subtables whose platform IDs are other than Macintosh platform ID 1. For ‘cmap’ subtables whose platform IDs are Macintosh, set this field to the Macintosh language ID of the ‘cmap’ subtable plus one, or to zero if the ‘cmap’ subtable is not language-specific. Format 0 was the standard mapping subtable used on older Macintosh platforms but is not required on newer Apple platforms.

This is a simple 1 to 1 mapping of character codes to glyph indices. The glyph set is limited to Note that if this format is used to index into a larger glyph set, only the first glyphs will be accessible.

This format is not commonly used today. These byte values are also valid as the second byte of a 2-byte character. In addition, even for the 2-byte characters, the mapping of character codes to glyph index values depends heavily on the first byte.

Consequently, the table begins with an array that maps the first byte to a SubHeader record. When SubHeader 0 is used, a second byte is not needed; the single byte value is mapped through the subArray. The firstCode and entryCount values specify a subrange that begins at firstCode and has a length equal to the value of entryCount.

See the article Collections for an illustration of the derivation of a special-purpose list class. This is a nested structure within class CMap. For an example of usage, see the example for CMap::PLookup. See the example for CMap::Lookup. Retrieves the map element at rNextPosition , then updates rNextPosition to refer to the next element in the map.

This function is most useful for iterating through all the elements in the map. Note that the position sequence is not necessarily the same as the key value sequence. The iteration sequence is not predictable; therefore, the “first element in the map” has no special significance. For best performance, the hash table size should be a prime number. To minimize collisions, the size should be roughly 20 percent larger than the largest anticipated data set.

See the example for CMap::RemoveAll. Lookup uses a hashing algorithm to quickly find the map element with a key that exactly matches the given key. Thus it can be used only on the left side of an assignment statement an l-value. If there is no map element with the specified key, then a new element is created. There is no “right side” r-value equivalent to this operator because there is a possibility that a key may not be found in the map.


cmap – Character To Glyph Index Mapping Table (OpenType ) – Typography | Microsoft Docs.CMap Class | Microsoft Docs

Aug 03,  · CMap CPoint> myMap; // Add 10 elements to the map. for (int i = 0; i 10; i++), CPoint(i, i)); replace.meAll(); ASSERT(replace.mey()); CMap::RemoveKey. Looks up the map entry corresponding to the supplied key; then, if the key is found, removes the entry. BOOL RemoveKey(ARG_KEY key); Parameters. ARG_KEY. C-Map offers the most personal, stress-free, end to end marine experience by providing high-quality nautical maps along with navigation, traffic and weather information to easily plan trips on the water and enjoyable experience with peace of mind. Jan 26,  · The Windows platform supports several encodings. When creating fonts for Windows, Unicode ‘cmap’ subtables should always be used—platform ID 3 with encoding ID 1 or encoding ID See below for additional details. The following encoding IDs are supported on the Windows platform: Windows Encodings.


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