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Update documentation of size requests.

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Harmony
Werner Lemberg 9 years ago
parent 8521ad99b0
commit 6432b8c490
1 changed files with 24 additions and 9 deletions
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  1. 33
      include/freetype/freetype.h

33
include/freetype/freetype.h
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@ -2345,13 +2345,22 @@ FT_BEGIN_HEADER
/* FT_Size_Request_Type */
/* */
/* <Description> */
/* An enumeration type that lists the supported size request types. */
/* An enumeration type that lists the supported size request types, */
/* i.e., what input size (in font units) maps to the requested output */
/* size (in pixels, as computed from the arguments of */
/* @FT_Size_Request). */
/* */
/* <Values> */
/* FT_SIZE_REQUEST_TYPE_NOMINAL :: */
/* The nominal size. The `units_per_EM' field of @FT_FaceRec is */
/* used to determine both scaling values. */
/* */
/* This is the standard scaling found in most applications. In */
/* particular, use this size request type for TrueType fonts if */
/* they provide optical scaling or something similar. Note, */
/* however, that `units_per_EM' is a rather abstract value which */
/* bears no relation to the actual size of the glyphs in a font. */
/* */
/* FT_SIZE_REQUEST_TYPE_REAL_DIM :: */
/* The real dimension. The sum of the `ascender' and (minus of) */
/* the `descender' fields of @FT_FaceRec are used to determine both */
@ -2405,22 +2414,28 @@ FT_BEGIN_HEADER
/* <Fields> */
/* type :: See @FT_Size_Request_Type. */
/* */
/* width :: The desired width. */
/* width :: The desired width, given as a 26.6 fractional */
/* point value (with 72pt = 1in). */
/* */
/* height :: The desired height. */
/* height :: The desired height, given as a 26.6 fractional */
/* point value (with 72pt = 1in). */
/* */
/* horiResolution :: The horizontal resolution. If set to zero, */
/* `width' is treated as a 26.6 fractional pixel */
/* value. */
/* horiResolution :: The horizontal resolution (dpi, i.e., pixels per */
/* inch). If set to zero, `width' is treated as a */
/* 26.6 fractional *pixel* value. */
/* */
/* vertResolution :: The vertical resolution. If set to zero, */
/* `height' is treated as a 26.6 fractional pixel */
/* value. */
/* vertResolution :: The vertical resolution (dpi, i.e., pixels per */
/* inch). If set to zero, `height' is treated as a */
/* 26.6 fractional *pixel* value. */
/* */
/* <Note> */
/* If `width' is zero, then the horizontal scaling value is set equal */
/* to the vertical scaling value, and vice versa. */
/* */
/* If `type' is FT_SIZE_REQUEST_TYPE_SCALES, `width' and `height' are */
/* interpreted directly as 16.16 fractional scaling values, without */
/* any further modification. */
/* */
typedef struct FT_Size_RequestRec_
{
FT_Size_Request_Type type;

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