aw/golang-freetype
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Don't use backtick quotes in the comments.

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This commit is contained in:
Nigel Tao 2015-08-18 16:33:14 +10:00
parent 2a5cbfd47e
commit e8121e3c7d
4 changed files with 21 additions and 15 deletions
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2
example/raster/main.go
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@ -28,7 +28,7 @@ type node struct {
x, y, degree int
}
// These contours "outside" and "inside" are from the `A' glyph from the Droid
// These contours "outside" and "inside" are from the 'A' glyph from the Droid
// Serif Regular font.
var outside = []node{

4
freetype.go
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@ -84,7 +84,7 @@ type Context struct {
cache [nGlyphs * nXFractions * nYFractions]cacheEntry
}
// PointToFixed converts the given number of points (as in ``a 12 point font'')
// PointToFixed converts the given number of points (as in "a 12 point font")
// into a 26.6 fixed point number of pixels.
func (c *Context) PointToFixed(x float64) fixed.Int26_6 {
return fixed.Int26_6(x * float64(c.dpi) * (64.0 / 72.0))
@ -304,7 +304,7 @@ func (c *Context) SetFont(font *truetype.Font) {
c.recalc()
}
// SetFontSize sets the font size in points (as in ``a 12 point font'').
// SetFontSize sets the font size in points (as in "a 12 point font").
func (c *Context) SetFontSize(fontSize float64) {
if c.fontSize == fontSize {
return

24
raster/raster.go
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@ -304,7 +304,7 @@ func (r *Rasterizer) Add1(b fixed.Point26_6) {
// Add2 adds a quadratic segment to the current curve.
func (r *Rasterizer) Add2(b, c fixed.Point26_6) {
// Calculate nSplit (the number of recursive decompositions) based on how
// `curvy' it is. Specifically, how much the middle point b deviates from
// 'curvy' it is. Specifically, how much the middle point b deviates from
// (a+c)/2.
dev := maxAbs(r.a.X-2*b.X+c.X, r.a.Y-2*b.Y+c.Y) / fixed.Int26_6(r.splitScale2)
nsplit := 0
@ -312,7 +312,8 @@ func (r *Rasterizer) Add2(b, c fixed.Point26_6) {
dev /= 4
nsplit++
}
// dev is 32-bit, and nsplit++ every time we shift off 2 bits, so maxNsplit is 16.
// dev is 32-bit, and nsplit++ every time we shift off 2 bits, so maxNsplit
// is 16.
const maxNsplit = 16
if nsplit > maxNsplit {
panic("freetype/raster: Add2 nsplit too large: " + strconv.Itoa(nsplit))
@ -331,8 +332,9 @@ func (r *Rasterizer) Add2(b, c fixed.Point26_6) {
s := sStack[i]
p := pStack[2*i:]
if s > 0 {
// Split the quadratic curve p[:3] into an equivalent set of two shorter curves:
// p[:3] and p[2:5]. The new p[4] is the old p[2], and p[0] is unchanged.
// Split the quadratic curve p[:3] into an equivalent set of two
// shorter curves: p[:3] and p[2:5]. The new p[4] is the old p[2],
// and p[0] is unchanged.
mx := p[1].X
p[4].X = p[2].X
p[3].X = (p[4].X + mx) / 2
@ -348,7 +350,8 @@ func (r *Rasterizer) Add2(b, c fixed.Point26_6) {
sStack[i+1] = s - 1
i++
} else {
// Replace the level-0 quadratic with a two-linear-piece approximation.
// Replace the level-0 quadratic with a two-linear-piece
// approximation.
midx := (p[0].X + 2*p[1].X + p[2].X) / 4
midy := (p[0].Y + 2*p[1].Y + p[2].Y) / 4
r.Add1(fixed.Point26_6{midx, midy})
@ -360,7 +363,8 @@ func (r *Rasterizer) Add2(b, c fixed.Point26_6) {
// Add3 adds a cubic segment to the current curve.
func (r *Rasterizer) Add3(b, c, d fixed.Point26_6) {
// Calculate nSplit (the number of recursive decompositions) based on how `curvy' it is.
// Calculate nSplit (the number of recursive decompositions) based on how
// 'curvy' it is.
dev2 := maxAbs(r.a.X-3*(b.X+c.X)+d.X, r.a.Y-3*(b.Y+c.Y)+d.Y) / fixed.Int26_6(r.splitScale2)
dev3 := maxAbs(r.a.X-2*b.X+d.X, r.a.Y-2*b.Y+d.Y) / fixed.Int26_6(r.splitScale3)
nsplit := 0
@ -369,7 +373,8 @@ func (r *Rasterizer) Add3(b, c, d fixed.Point26_6) {
dev3 /= 4
nsplit++
}
// devN is 32-bit, and nsplit++ every time we shift off 2 bits, so maxNsplit is 16.
// devN is 32-bit, and nsplit++ every time we shift off 2 bits, so
// maxNsplit is 16.
const maxNsplit = 16
if nsplit > maxNsplit {
panic("freetype/raster: Add3 nsplit too large: " + strconv.Itoa(nsplit))
@ -389,8 +394,9 @@ func (r *Rasterizer) Add3(b, c, d fixed.Point26_6) {
s := sStack[i]
p := pStack[3*i:]
if s > 0 {
// Split the cubic curve p[:4] into an equivalent set of two shorter curves:
// p[:4] and p[3:7]. The new p[6] is the old p[3], and p[0] is unchanged.
// Split the cubic curve p[:4] into an equivalent set of two
// shorter curves: p[:4] and p[3:7]. The new p[6] is the old p[3],
// and p[0] is unchanged.
m01x := (p[0].X + p[1].X) / 2
m12x := (p[1].X + p[2].X) / 2
m23x := (p[2].X + p[3].X) / 2

6
truetype/glyph.go
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@ -21,11 +21,11 @@ const (
// TODO: implement VerticalHinting.
)
// A Point is a co-ordinate pair plus whether it is ``on'' a contour or an
// ``off'' control point.
// A Point is a co-ordinate pair plus whether it is 'on' a contour or an 'off'
// control point.
type Point struct {
X, Y fixed.Int26_6
// The Flags' LSB means whether or not this Point is ``on'' the contour.
// The Flags' LSB means whether or not this Point is 'on' the contour.
// Other bits are reserved for internal use.
Flags uint32
}