diff options
Diffstat (limited to 'skia/include')
| -rw-r--r-- | skia/include/SkFontHost.h | 48 |
1 files changed, 45 insertions, 3 deletions
diff --git a/skia/include/SkFontHost.h b/skia/include/SkFontHost.h index c3b2e2d..d140dec 100644 --- a/skia/include/SkFontHost.h +++ b/skia/include/SkFontHost.h @@ -24,6 +24,9 @@ class SkDescriptor; class SkStream; class SkWStream; +typedef uint32_t SkFontTableTag; +typedef uint32_t SkFontID; + /** \class SkFontHost This class is ported to each environment. It is responsible for bridging @@ -69,13 +72,13 @@ public: /** Return the typeface associated with the uniqueID, or null if that ID does not match any faces. */ - static SkTypeface* ResolveTypeface(uint32_t uniqueID); + static SkTypeface* ResolveTypeface(SkFontID uniqueID); /** Return a new stream to read the font data, or null if the uniqueID does not match an existing typeface */ - static SkStream* OpenStream(uint32_t uniqueID); - static void CloseStream(uint32_t uniqueID, SkStream*); + static SkStream* OpenStream(SkFontID uniqueID); + static void CloseStream(SkFontID uniqueID, SkStream*); /** Return a new typeface given the data buffer (owned by the caller). If the data does not represent a valid font, return null. @@ -84,6 +87,45 @@ public: /////////////////////////////////////////////////////////////////////////// + /** Return the number of tables in the font + */ + static int CountTables(SkFontID); + + /** Copy into tags[] (allocated by the caller) the list of table tags in + the font, and return the number. This will be the same as CountTables() + or 0 if an error occured. + */ + static int GetTableTags(SkFontID, SkFontTableTag[]); + + /** Given a table tag, return the size of its contents, or 0 if not present + */ + static size_t GetTableSize(SkFontID, SkFontTableTag); + + /** Copy the contents of a table into data (allocated by the caller). Note + that the contents of the table will be in their native endian order + (which for most truetype tables is big endian). If the table tag is + not found, or there is an error copying the data, then 0 is returned. + If this happens, it is possible that some or all of the memory pointed + to by data may have been written to, even though an error has occured. + + @param fontID the font to copy the table from + @param tag The table tag whose contents are to be copied + @param offset The offset in bytes into the table's contents where the + copy should start from. + @param length The number of bytes, starting at offset, of table data + to copy. + @param data storage address where the table contents are copied to + @return the number of bytes actually copied into data. If offset+length + exceeds the table's size, then only the bytes up to the table's + size are actually copied, and this is the value returned. If + offset > the table's size, or tag is not a valid table, + then 0 is returned. + */ + static size_t GetTableData(SkFontID fontID, SkFontTableTag tag, + size_t offset, size_t length, void* data); + + /////////////////////////////////////////////////////////////////////////// + /** Write a unique identifier to the stream, so that the same typeface can be retrieved with Deserialize(). */ |