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Call it fixed-point.

This commit is contained in:
Alexei Podtelezhnikov 2013-01-12 19:17:05 -05:00
parent e4ecce3bfe
commit a692170a23
10 changed files with 19 additions and 20 deletions
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2
ChangeLog.23
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@ -6668,7 +6668,7 @@
2007-01-10 Derek Clegg <dclegg@apple.com>
* src/type1/t1load.c (T1_Get_MM_Var): Always return fixed point
* src/type1/t1load.c (T1_Get_MM_Var): Always return fixed-point
values.
2007-01-08 David Turner <david@freetype.org>

4
include/freetype/freetype.h
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@ -3695,7 +3695,7 @@ FT_BEGIN_HEADER
/* <Description> */
/* A very simple function used to perform the computation */
/* `(a*b)/0x10000' with maximum accuracy. Most of the time this is */
/* used to multiply a given value by a 16.16 fixed float factor. */
/* used to multiply a given value by a 16.16 fixed-point factor. */
/* */
/* <Input> */
/* a :: The first multiplier. */
@ -3740,7 +3740,7 @@ FT_BEGIN_HEADER
/* <Description> */
/* A very simple function used to perform the computation */
/* `(a*0x10000)/b' with maximum accuracy. Most of the time, this is */
/* used to divide a given value by a 16.16 fixed float factor. */
/* used to divide a given value by a 16.16 fixed-point factor. */
/* */
/* <Input> */
/* a :: The first multiplier. */

2
include/freetype/ftglyph.h
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@ -94,7 +94,7 @@ FT_BEGIN_HEADER
/* */
/* <Description> */
/* The root glyph structure contains a given glyph image plus its */
/* advance width in 16.16 fixed float format. */
/* advance width in 16.16 fixed-point format. */
/* */
/* <Fields> */
/* library :: A handle to the FreeType library object. */

2
include/freetype/ftimage.h
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@ -54,7 +54,7 @@ FT_BEGIN_HEADER
/* <Description> */
/* The type FT_Pos is used to store vectorial coordinates. Depending */
/* on the context, these can represent distances in integer font */
/* units, or 16.16, or 26.6 fixed float pixel coordinates. */
/* units, or 16.16, or 26.6 fixed-point pixel coordinates. */
/* */
typedef signed long FT_Pos;

2
include/freetype/ftstroke.h
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@ -271,7 +271,7 @@ FT_BEGIN_HEADER
* miter_limit ::
* The miter limit for the FT_STROKER_LINEJOIN_MITER_FIXED and
* FT_STROKER_LINEJOIN_MITER_VARIABLE line join styles,
* expressed as 16.16 fixed point value.
* expressed as 16.16 fixed-point value.
*
* @note:
* The radius is expressed in the same units as the outline

8
include/freetype/fttrigon.h
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@ -46,7 +46,7 @@ FT_BEGIN_HEADER
*
* @description:
* This type is used to model angle values in FreeType. Note that the
* angle is a 16.16 fixed float value expressed in degrees.
* angle is a 16.16 fixed-point value expressed in degrees.
*
*/
typedef FT_Fixed FT_Angle;
@ -106,7 +106,7 @@ FT_BEGIN_HEADER
* FT_Sin
*
* @description:
* Return the sinus of a given angle in fixed point format.
* Return the sinus of a given angle in fixed-point format.
*
* @input:
* angle ::
@ -130,7 +130,7 @@ FT_BEGIN_HEADER
* FT_Cos
*
* @description:
* Return the cosinus of a given angle in fixed point format.
* Return the cosinus of a given angle in fixed-point format.
*
* @input:
* angle ::
@ -154,7 +154,7 @@ FT_BEGIN_HEADER
* FT_Tan
*
* @description:
* Return the tangent of a given angle in fixed point format.
* Return the tangent of a given angle in fixed-point format.
*
* @input:
* angle ::

8
include/freetype/fttypes.h
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@ -255,7 +255,7 @@ FT_BEGIN_HEADER
/* FT_F2Dot14 */
/* */
/* <Description> */
/* A signed 2.14 fixed float type used for unit vectors. */
/* A signed 2.14 fixed-point type used for unit vectors. */
/* */
typedef signed short FT_F2Dot14;
@ -266,7 +266,7 @@ FT_BEGIN_HEADER
/* FT_F26Dot6 */
/* */
/* <Description> */
/* A signed 26.6 fixed float type used for vectorial pixel */
/* A signed 26.6 fixed-point type used for vectorial pixel */
/* coordinates. */
/* */
typedef signed long FT_F26Dot6;
@ -278,7 +278,7 @@ FT_BEGIN_HEADER
/* FT_Fixed */
/* */
/* <Description> */
/* This type is used to store 16.16 fixed float values, like scaling */
/* This type is used to store 16.16 fixed-point values, like scaling */
/* values or matrix coefficients. */
/* */
typedef signed long FT_Fixed;
@ -362,7 +362,7 @@ FT_BEGIN_HEADER
/* */
/* <Description> */
/* A simple structure used to store a 2x2 matrix. Coefficients are */
/* in 16.16 fixed float format. The computation performed is: */
/* in 16.16 fixed-point format. The computation performed is: */
/* */
/* { */
/* x' = x*xx + y*xy */

2
include/freetype/internal/ftcalc.h
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@ -33,7 +33,7 @@ FT_BEGIN_HEADER
/* FT_FixedSqrt */
/* */
/* <Description> */
/* Computes the square root of a 16.16 fixed point value. */
/* Computes the square root of a 16.16 fixed-point value. */
/* */
/* <Input> */
/* x :: The value to compute the root for. */

4
src/base/ftbbox.c
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@ -369,12 +369,12 @@
/* We need to solve `ax^2+2bx+c' here, without floating points! */
/* The trick is to normalize to a different representation in order */
/* to use our 16.16 fixed point routines. */
/* to use our 16.16 fixed-point routines. */
/* */
/* We compute FT_MulFix(b,b) and FT_MulFix(a,c) after normalization. */
/* These values must fit into a single 16.16 value. */
/* */
/* We normalize a, b, and c to `8.16' fixed float values to ensure */
/* We normalize a, b, and c to `8.16' fixed-point values to ensure */
/* that its product is held in a `16.16' value. */
{

5
src/tools/test_trig.c
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@ -8,9 +8,8 @@
#define PI 3.14159265358979323846
#define SPI (PI/FT_ANGLE_PI)
/* the precision in 16.16 fixed float points of the checks. Expect */
/* between 2 and 5 noise LSB bits during operations, due to */
/* rounding errors.. */
/* the precision in 16.16 fixed-point checks. Expect between 2 and 5 */
/* noise LSB bits during operations, due to rounding errors.. */
#define THRESHOLD 64
static error = 0;