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freetype2 error codes Santa Claus, Indiana

no width, no outline). Animal Shelter in Java Why would a password requirement prohibit a number in the last character? error = FT_Render_Glyph( face->glyph, /* glyph slot */ render_mode ); /* render mode */ The parameter render_mode is a set of bit flags to specify how to render the glyph image. However, the Freetype docs seem to completely omit what errors can be expected from what functions.

return FreeType error code. 0means success. There are two ways to select a different charmap with FreeType2. You can always check if the typeface contains a character by calling FT_Get_Char_Index. –Omri Barel Jun 27 '13 at 18:58 | show 1 more comment 1 Answer 1 active oldest votes However, if you want to specify the pixel sizes yourself, you can simply call FT_Set_Pixel_Sizes, as in error = FT_Set_Pixel_Sizes( face, /* handle to face object */ 0, /* pixel_width */

Include the file named ft2build.h. Include the main FreeType2 API header file. The advance vector is expressed in 1/64th of pixels, and is truncated to integer pixels on each iteration. Each FT_Bitmap_Size indicates the horizontal and vertical character pixel sizes for each of the strikes that are present in the face.

pen_x = 300; pen_y = 200; for ( n = 0; n < num_chars; n++ ) { FT_UInt glyph_index; /* retrieve glyph index from character code */ glyph_index = FT_Get_Char_Index( face, By convention, it always corresponds to a special glyph image called the missing glyph, which is commonly displayed as a box or a space. Use the scaling part to compute a new character pixel size, then the other one to call FT_Set_Transform. The complete list of available fields is in the FT_FaceRec structure description.

We do not use FT_LOAD_DEFAULT for the loading mode, but the bit flag FT_LOAD_RENDER. Good Term For "Mild" Error (Software) Security Patch SUPEE-8788 - Possible Problems? It is set to NULL in case of error. Loading a glyph bitmap with a non-identity transformation works; the transformation is ignored in this case. 7.

FT_CONFIG_CONFIG_H #ifndef FT_CONFIG_CONFIG_H #define FT_CONFIG_CONFIG_H #endif A macro used in #include statements to name the file containing FreeType2 configuration data. [Index][Top][TOC] FT_CONFIG_STANDARD_LIBRARY_H #ifndef FT_CONFIG_STANDARD_LIBRARY_H #define FT_CONFIG_STANDARD_LIBRARY_H #endif A macro For now, we will assume that the face contains at least a Unicode charmap that was selected during a call to FT_New_Face. The currently selected charmap can be accessed via face->charmap. Your cache administrator is webmaster.

The first one is that such macros are not limited to the infamous 8.3naming rule required by DOS (and ‘FT_MULTIPLE_MASTERS_H’ is a lot more meaningful than ‘ftmm.h’). Note also that a given charmap might not map to all the glyphs present in the font. share|improve this answer answered Sep 19 '15 at 6:54 N. This function can be used to ‘activate’ a previously created size object.

We can do this using FT_Set_Transform. error = FT_Init_FreeType( &library ); if ( error ) { ... Rotation usually disables hinting. We now use a vector of type FT_Vector to store the pen position, with coordinates expressed as 1/64th of pixels, hence a multiplication.

You should use the UTF-32 representation form of Unicode; for example, if you want to load character U+1F028, use value 0x1F028 as the value for charcode. Scalable formats like TrueType or CFF use vectorial shapes (outlines) to describe each glyph. Error code: " << errorCode << std::endl; } for (char i = 0; i < 256; i++) { errorCode = FT_Load_Char(face, i, FT_LOAD_RENDER); // This returns 36 when i is 0 Simple Text Rendering We now present a simple example to render a string of 8-bit Latin-1 text, assuming a face that contains a Unicode charmap.

See FT_New_Size and FT_Done_Size. The macro names are not limited to the DOS 8.3 file naming limit; names like FT_MULTIPLE_MASTERS_H or FT_SFNT_NAMES_H are a lot more readable and explanatory than the real file names ftmm.h another error code means that the font file could not ... A point is a physical distance, equaling 1/72th of an inch.

FreeType tries to emulate a Unicode charmap if the font doesn't contain such a charmap, based on glyph names. The third parameter is a pointer to a FT_Vector structure that describes a simple two-dimensional vector that is used to translate the glyph image after the 2×2 transformation. The second argument is the error code, and the last argument an error string, which is not used by FreeType. I fixed the problem by adding a call to FT_Set_Char_Size right after FT_New_Face.

It is important to note that, while this example is a bit more complex than the previous one, it is strictly equivalent for the case where the transformation is the identity. We set the transformation on each glyph to indicate the rotation matrix as well as a delta that will move the transformed image to the current pen position (in cartesian space, For example, ‘Times New Roman Regular’ and ‘Times New Roman Italic’ correspond to two different faces. the font file could be opened and read, but it appears ...

Macro ‘FT_NOERRORDEF_’ defines ‘FT_Err_Ok’, which is always zero. When a new face object is created, all elements are set to0 during initialization. For example, most TrueType fonts contain two charmaps. up vote 3 down vote favorite Given an FT_Error, is there a macro/function to return the corresponding error message string?

Note also that a given charmap might not map to all the glyphs present in the font. A glyph is a character image, nothing more – it thus doesn't necessarily correspond to a character code. A strike is a series of glyph images for a given character pixel size. We use the function FT_Load_Char instead of FT_Load_Glyph.

FT_GlyphSlot slot = face->glyph; /* a small shortcut */ int pen_x, pen_y, n; ... How do I say "Thank you, Captain Obvious?" How to prevent Beamer from repeatedly expanding macros in \frametitle when frame-breaking Why does this test yield True Review paper/book on Finite Difference Should I go with one of the two options I described? more hot questions question feed default about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation

With modern technology, is it possible to permanently stay in sunlight, without going into space? The list is defined in the TrueType specification; you can also use the file FT_TRUETYPE_IDS_H, which defines several helpful constants to deal with them. c. Performance isn't really critical in the code that calls the Freetype library, so even the latter option would probably be acceptable, but surely there must be some kind of documentation on

We have thus decided to simplify the API for the most common use (i.e., one size per face) while keeping this feature available through additional functions. This field is NULL if no charmap is selected, which typically happens when you create a new FT_Face object from a font file that doesn't contain a Unicode charmap (which is It indicates that the glyph image must be immediately converted to an anti-aliased bitmap. For optimal rendering on a screen the bitmap should be used as an alpha channel in linear blending with gamma correction.

For example, most older TrueType fonts contain two charmaps: One is used to convert Unicode character codes to glyph indices, the other one is used to convert Apple Roman encoding to Note that you can also specify that you want a monochrome bitmap instead by using the additional FT_LOAD_MONOCHROME load flag. We will describe later how to look for specific charmaps in a face.