func TestFreetypeRasterizerNonZeroWinding(t *testing.T) {
var p Path
p.LineTo(10, 190)
draw2dbase.TraceCubic(&p, []float64{10, 190, 10, 10, 190, 10, 190, 190}, 0.5)
poly := Polygon(p.points)
color := color.RGBA{0, 0, 0, 0xff}
img := image.NewRGBA(image.Rect(0, 0, 200, 200))
rasterizer := raster.NewRasterizer(200, 200)
rasterizer.UseNonZeroWinding = true
rasterizer.Start(raster.Point{
X: raster.Fix32(10 * 256),
Y: raster.Fix32(190 * 256)})
for j := 0; j < len(poly); j = j + 2 {
rasterizer.Add1(raster.Point{
X: raster.Fix32(poly[j] * 256),
Y: raster.Fix32(poly[j+1] * 256)})
}
painter := raster.NewRGBAPainter(img)
painter.SetColor(color)
rasterizer.Rasterize(painter)
err := draw2dimg.SaveToPngFile("output/TestFreetypeRasterizerNonZeroWinding.png", img)
if err != nil {
fmt.Println(err)
}
}
// MeasureString returns the width and height of the string in s, in terms of
// raster.Fix32 units.
//
// BUG(burntsushi): I don't think negative x-coordinates are handled at all, so
// that the bounding box could be smaller than what it actually is. (i.e., the
// first letter is an italic 'J'.)
func (c *Context) MeasureString(s string) (raster.Fix32, raster.Fix32, error) {
if c.font == nil {
return 0, 0, errors.New("freetype: DrawText called with a nil font")
}
var width, height, heightMax raster.Fix32
oneLine := c.PointToFix32(c.fontSize) & 0xff
height = c.PointToFix32(c.fontSize)
prev, hasPrev := truetype.Index(0), false
for _, rune := range s {
index := c.font.Index(rune)
if hasPrev {
width += raster.Fix32(c.font.Kerning(c.scale, prev, index)) << 2
}
if err := c.glyphBuf.Load(c.font, c.scale, index, truetype.NoHinting); err != nil {
return 0, 0, err
}
ymax := oneLine - raster.Fix32(c.glyphBuf.B.YMin<<2) + 0xff
heightMax = max(heightMax, ymax)
width += raster.Fix32(c.font.HMetric(c.scale, index).AdvanceWidth) << 2
prev, hasPrev = index, true
}
if heightMax > 0 {
height += heightMax
}
return width, height, nil
}
func arcAdder(adder raster.Adder, x, y, rx, ry, start, angle, scale float64) raster.Point {
end := start + angle
clockWise := true
if angle < 0 {
clockWise = false
}
ra := (math.Abs(rx) + math.Abs(ry)) / 2
da := math.Acos(ra/(ra+0.125/scale)) * 2
//normalize
if !clockWise {
da = -da
}
angle = start + da
var curX, curY float64
for {
if (angle < end-da/4) != clockWise {
curX = x + math.Cos(end)*rx
curY = y + math.Sin(end)*ry
return raster.Point{
X: raster.Fix32(curX * 256),
Y: raster.Fix32(curY * 256)}
}
curX = x + math.Cos(angle)*rx
curY = y + math.Sin(angle)*ry
angle += da
adder.Add1(raster.Point{
X: raster.Fix32(curX * 256),
Y: raster.Fix32(curY * 256)})
}
}
func TestFreetypeNonZeroWinding(t *testing.T) {
var p Path
p.LineTo(10, 190)
c := curve.CubicCurveFloat64{10, 190, 10, 10, 190, 10, 190, 190}
c.Segment(&p, flatteningThreshold)
poly := Polygon(p.points)
color := color.RGBA{0, 0, 0, 0xff}
img := image.NewRGBA(image.Rect(0, 0, 200, 200))
rasterizer := raster.NewRasterizer(200, 200)
rasterizer.UseNonZeroWinding = true
rasterizer.Start(raster.Point{
X: raster.Fix32(10 * 256),
Y: raster.Fix32(190 * 256)})
for j := 0; j < len(poly); j = j + 2 {
rasterizer.Add1(raster.Point{
X: raster.Fix32(poly[j] * 256),
Y: raster.Fix32(poly[j+1] * 256)})
}
painter := raster.NewRGBAPainter(img)
painter.SetColor(color)
rasterizer.Rasterize(painter)
savepng("../output/raster/TestFreetypeNonZeroWinding.png", img)
}
func p(n node) raster.Point {
x, y := 20+n.x/4, 380-n.y/4
return raster.Point{
X: raster.Fix32(x * 256),
Y: raster.Fix32(y * 256),
}
}
func BenchmarkFreetype(b *testing.B) {
var p Path
p.LineTo(10, 190)
c := curve.CubicCurveFloat64{10, 190, 10, 10, 190, 10, 190, 190}
c.Segment(&p, flatteningThreshold)
poly := Polygon(p.points)
color := color.RGBA{0, 0, 0, 0xff}
for i := 0; i < b.N; i++ {
img := image.NewRGBA(image.Rect(0, 0, 200, 200))
rasterizer := raster.NewRasterizer(200, 200)
rasterizer.UseNonZeroWinding = false
rasterizer.Start(raster.Point{
X: raster.Fix32(10 * 256),
Y: raster.Fix32(190 * 256)})
for j := 0; j < len(poly); j = j + 2 {
rasterizer.Add1(raster.Point{
X: raster.Fix32(poly[j] * 256),
Y: raster.Fix32(poly[j+1] * 256)})
}
painter := raster.NewRGBAPainter(img)
painter.SetColor(color)
rasterizer.Rasterize(painter)
}
}
// DrawString draws s at p and returns p advanced by the text extent. The text
// is placed so that the left edge of the em square of the first character of s
// and the baseline intersect at p. The majority of the affected pixels will be
// above and to the right of the point, but some may be below or to the left.
// For example, drawing a string that starts with a 'J' in an italic font may
// affect pixels below and left of the point.
// p is a raster.Point and can therefore represent sub-pixel positions.
func (c *Context) DrawString(s string, p raster.Point) (raster.Point, error) {
if c.font == nil {
return raster.Point{}, errors.New("freetype: DrawText called with a nil font")
}
prev, hasPrev := truetype.Index(0), false
for _, rune := range s {
index := c.font.Index(rune)
if hasPrev {
p.X += raster.Fix32(c.font.Kerning(c.scale, prev, index)) << 2
}
mask, offset, err := c.glyph(index, p)
if err != nil {
return raster.Point{}, err
}
p.X += raster.Fix32(c.font.HMetric(c.scale, index).AdvanceWidth) << 2
glyphRect := mask.Bounds().Add(offset)
dr := c.clip.Intersect(glyphRect)
if !dr.Empty() {
mp := image.Point{0, dr.Min.Y - glyphRect.Min.Y}
draw.DrawMask(c.dst, dr, c.src, image.ZP, mask, mp, draw.Over)
}
prev, hasPrev = index, true
}
return p, nil
}
func BenchmarkFreetypeNonZeroWinding(b *testing.B) {
var p Path
p.LineTo(10, 190)
draw2dbase.TraceCubic(&p, []float64{10, 190, 10, 10, 190, 10, 190, 190}, 0.5)
poly := Polygon(p.points)
color := color.RGBA{0, 0, 0, 0xff}
for i := 0; i < b.N; i++ {
img := image.NewRGBA(image.Rect(0, 0, 200, 200))
rasterizer := raster.NewRasterizer(200, 200)
rasterizer.UseNonZeroWinding = true
rasterizer.Start(raster.Point{
X: raster.Fix32(10 * 256),
Y: raster.Fix32(190 * 256)})
for j := 0; j < len(poly); j = j + 2 {
rasterizer.Add1(raster.Point{
X: raster.Fix32(poly[j] * 256),
Y: raster.Fix32(poly[j+1] * 256)})
}
painter := raster.NewRGBAPainter(img)
painter.SetColor(color)
rasterizer.Rasterize(painter)
}
}
func (tr MatrixTransform) TransformRasterPoint(points ...*raster.Point) {
for _, point := range points {
x := float64(point.X) / 256
y := float64(point.Y) / 256
point.X = raster.Fix32((x*tr[0] + y*tr[2] + tr[4]) * 256)
point.Y = raster.Fix32((x*tr[1] + y*tr[3] + tr[5]) * 256)
}
}
func (vertexAdder *VertexAdder) Vertex(x, y float64) {
switch vertexAdder.command {
case VertexStartCommand:
vertexAdder.adder.Start(raster.Point{raster.Fix32(x * 256), raster.Fix32(y * 256)})
default:
vertexAdder.adder.Add1(raster.Point{raster.Fix32(x * 256), raster.Fix32(y * 256)})
}
vertexAdder.command = VertexNoCommand
}
func (p *glyphPage) add(rune rune, g *glyph) bool {
if _, found := p.offsets[rune]; found {
panic("Glyph already added to glyph page")
}
w, h := g.size(p.resolution).WH()
x, y := p.nextPoint.X, p.nextPoint.Y
if x+w > p.size.W {
// Row full, start new line
x = 0
y += p.rowHeight + glyphPadding
p.rowHeight = 0
}
if y+h > p.size.H {
return false // Page full
}
// Build the raster contours
p.rast.Clear()
fx := -raster.Fix32((int64(g.B.XMin) * int64(p.resolution)) >> 14)
fy := +raster.Fix32((int64(g.B.YMax) * int64(p.resolution)) >> 14)
e0 := 0
for _, e1 := range g.End {
p.drawContour(g.Point[e0:e1], fx, fy)
e0 = e1
}
// Perform the rasterization
a := &image.Alpha{
Pix: p.image.Pix[x+y*p.image.Stride:],
Stride: p.image.Stride,
Rect: image.Rect(0, 0, w, h),
}
p.rast.Rasterize(raster.NewAlphaSrcPainter(a))
p.offsets[rune] = math.Point{X: x, Y: y}
p.nextPoint = math.Point{X: x + w + glyphPadding, Y: y}
if h > p.rowHeight {
p.rowHeight = h
}
if p.tex != nil {
p.tex.Release()
p.tex = nil
}
return true
}
func (pathAdder *PathAdder) Convert(paths ...*PathStorage) {
for _, path := range paths {
j := 0
for _, cmd := range path.commands {
switch cmd {
case MoveTo:
pathAdder.firstPoint = raster.Point{raster.Fix32(path.vertices[j] * 256), raster.Fix32(path.vertices[j+1] * 256)}
pathAdder.adder.Start(pathAdder.firstPoint)
j += 2
case LineTo:
pathAdder.adder.Add1(raster.Point{raster.Fix32(path.vertices[j] * 256), raster.Fix32(path.vertices[j+1] * 256)})
j += 2
case QuadCurveTo:
pathAdder.adder.Add2(raster.Point{raster.Fix32(path.vertices[j] * 256), raster.Fix32(path.vertices[j+1] * 256)}, raster.Point{raster.Fix32(path.vertices[j+2] * 256), raster.Fix32(path.vertices[j+3] * 256)})
j += 4
case CubicCurveTo:
pathAdder.adder.Add3(raster.Point{raster.Fix32(path.vertices[j] * 256), raster.Fix32(path.vertices[j+1] * 256)}, raster.Point{raster.Fix32(path.vertices[j+2] * 256), raster.Fix32(path.vertices[j+3] * 256)}, raster.Point{raster.Fix32(path.vertices[j+4] * 256), raster.Fix32(path.vertices[j+5] * 256)})
j += 6
case ArcTo:
lastPoint := arcAdder(pathAdder.adder, path.vertices[j], path.vertices[j+1], path.vertices[j+2], path.vertices[j+3], path.vertices[j+4], path.vertices[j+5], pathAdder.ApproximationScale)
pathAdder.adder.Add1(lastPoint)
j += 6
case Close:
pathAdder.adder.Add1(pathAdder.firstPoint)
}
}
}
}
// drawContour draws the given closed contour with the given offset.
func (p *glyphPage) drawContour(ps []truetype.Point, dx, dy raster.Fix32) {
if len(ps) == 0 {
return
}
rast := p.rast
resolution := p.resolution
// ps[0] is a truetype.Point measured in FUnits and positive Y going upwards.
// start is the same thing measured in fixed point units and positive Y
// going downwards, and offset by (dx, dy)
start := raster.Point{
X: dx + raster.Fix32(int64(ps[0].X)*int64(resolution)>>14),
Y: dy - raster.Fix32(int64(ps[0].Y)*int64(resolution)>>14),
}
rast.Start(start)
q0, on0 := start, true
for _, p := range ps[1:] {
q := raster.Point{
X: dx + raster.Fix32(int64(p.X)*int64(resolution)>>14),
Y: dy - raster.Fix32(int64(p.Y)*int64(resolution)>>14),
}
on := p.Flags&0x01 != 0
if on {
if on0 {
rast.Add1(q)
} else {
rast.Add2(q0, q)
}
} else {
if on0 {
// No-op.
} else {
mid := raster.Point{
X: (q0.X + q.X) / 2,
Y: (q0.Y + q.Y) / 2,
}
rast.Add2(q0, mid)
}
}
q0, on0 = q, on
}
// Close the curve.
if on0 {
rast.Add1(start)
} else {
rast.Add2(q0, start)
}
}
// rasterize returns the advance width, glyph mask and integer-pixel offset
// to render the given glyph at the given sub-pixel offsets.
// The 24.8 fixed point arguments fx and fy must be in the range [0, 1).
func (c *Context) rasterize(glyph truetype.Index, fx, fy raster.Fix32) (
raster.Fix32, *image.Alpha, image.Point, error) {
if err := c.glyphBuf.Load(c.font, c.scale, glyph, truetype.Hinting(c.hinting)); err != nil {
return 0, nil, image.Point{}, err
}
// Calculate the integer-pixel bounds for the glyph.
xmin := int(fx+raster.Fix32(c.glyphBuf.B.XMin<<2)) >> 8
ymin := int(fy-raster.Fix32(c.glyphBuf.B.YMax<<2)) >> 8
xmax := int(fx+raster.Fix32(c.glyphBuf.B.XMax<<2)+0xff) >> 8
ymax := int(fy-raster.Fix32(c.glyphBuf.B.YMin<<2)+0xff) >> 8
if xmin > xmax || ymin > ymax {
return 0, nil, image.Point{}, errors.New("freetype: negative sized glyph")
}
// A TrueType's glyph's nodes can have negative co-ordinates, but the
// rasterizer clips anything left of x=0 or above y=0. xmin and ymin
// are the pixel offsets, based on the font's FUnit metrics, that let
// a negative co-ordinate in TrueType space be non-negative in
// rasterizer space. xmin and ymin are typically <= 0.
fx += raster.Fix32(-xmin << 8)
fy += raster.Fix32(-ymin << 8)
// Rasterize the glyph's vectors.
c.r.Clear()
e0 := 0
for _, e1 := range c.glyphBuf.End {
c.drawContour(c.glyphBuf.Point[e0:e1], fx, fy)
e0 = e1
}
a := image.NewAlpha(image.Rect(0, 0, xmax-xmin, ymax-ymin))
c.r.Rasterize(raster.NewAlphaSrcPainter(a))
return raster.Fix32(c.glyphBuf.AdvanceWidth << 2), a, image.Point{xmin, ymin}, nil
}
func (ig *ImageGraphics) TextLen(s string, font chart.Font) int {
c := freetype.NewContext()
c.SetDPI(dpi)
c.SetFont(ig.font)
fontsize := ig.relFontsizeToPixel(font.Size)
c.SetFontSize(fontsize)
scale := int32(fontsize * dpi * (64.0 / 72.0))
var p raster.Point
prev, hasPrev := truetype.Index(0), false
for _, rune := range s {
index := ig.font.Index(rune)
if hasPrev {
p.X += raster.Fix32(ig.font.Kerning(scale, prev, index)) << 2
}
p.X += raster.Fix32(ig.font.HMetric(scale, index).AdvanceWidth) << 2
prev, hasPrev = index, true
}
return int((p.X + 127) / 256)
}
func TestFreetype(t *testing.T) {
var p Path
p.LineTo(10, 190)
c := curve.CubicCurveFloat64{10, 190, 10, 10, 190, 10, 190, 190}
c.Segment(&p, flattening_threshold)
poly := Polygon(p.points)
rgba := color.RGBA{0, 0, 0, 0xff}
bounds := image.Rect(0, 0, 200, 200)
mask := image.NewAlpha(bounds)
img := image.NewRGBA(bounds)
rasterizer := raster.NewRasterizer(200, 200)
rasterizer.UseNonZeroWinding = false
rasterizer.Start(raster.Point{raster.Fix32(10 * 256), raster.Fix32(190 * 256)})
for j := 0; j < len(poly); j = j + 2 {
rasterizer.Add1(raster.Point{raster.Fix32(poly[j] * 256), raster.Fix32(poly[j+1] * 256)})
}
painter := raster.NewAlphaSrcPainter(mask)
rasterizer.Rasterize(painter)
DrawSolidRGBA(img, mask, rgba)
savepng("_testFreetype.png", img)
}
// moustache draws a moustache of the specified size and droop
// onto the image m and returns the result. It may overwrite the
// original.
func moustache(m image.Image, x, y, size, droopFactor int) image.Image {
mrgba := rgba(m)
p := raster.NewRGBAPainter(mrgba)
p.SetColor(color.RGBA{0, 0, 0, 255})
w, h := m.Bounds().Dx(), m.Bounds().Dy()
r := raster.NewRasterizer(w, h)
var (
mag = raster.Fix32((10 + size) << 8)
width = pt(20, 0).Mul(mag)
mid = pt(x, y)
droop = pt(0, droopFactor).Mul(mag)
left = mid.Sub(width).Add(droop)
right = mid.Add(width).Add(droop)
bow = pt(0, 5).Mul(mag).Sub(droop)
curlx = pt(10, 0).Mul(mag)
curly = pt(0, 2).Mul(mag)
risex = pt(2, 0).Mul(mag)
risey = pt(0, 5).Mul(mag)
)
r.Start(left)
r.Add3(
mid.Sub(curlx).Add(curly),
mid.Sub(risex).Sub(risey),
mid,
)
r.Add3(
mid.Add(risex).Sub(risey),
mid.Add(curlx).Add(curly),
right,
)
r.Add2(
mid.Add(bow),
left,
)
r.Rasterize(p)
return mrgba
}
// PointToFix32 converts the given number of points (as in ``a 12 point font'')
// into fixed point units.
func (c *Context) PointToFix32(x float64) raster.Fix32 {
return raster.Fix32(x * float64(c.dpi) * (256.0 / 72.0))
}
// the returned zoneOfColor always has A == 256.
func worldImage(t *testing.T) (im *image.RGBA, zoneOfColor map[color.RGBA]string) {
scale := *flagScale
width := int(scale * 360)
height := int(scale * 180)
im = image.NewRGBA(image.Rect(0, 0, width, height))
zoneOfColor = map[color.RGBA]string{}
tab := crc32.MakeTable(crc32.IEEE + 1)
drawPoly := func(col color.RGBA, xys ...int) {
painter := raster.NewRGBAPainter(im)
painter.SetColor(col)
r := raster.NewRasterizer(width, height)
r.Start(raster.Point{X: raster.Fix32(xys[0]) << 8, Y: raster.Fix32(xys[1]) << 8})
for i := 2; i < len(xys); i += 2 {
r.Add1(raster.Point{X: raster.Fix32(xys[i]) << 8, Y: raster.Fix32(xys[i+1]) << 8})
}
r.Add1(raster.Point{X: raster.Fix32(xys[0]) << 8, Y: raster.Fix32(xys[1]) << 8})
r.Rasterize(raster.NewMonochromePainter(painter))
}
sr, err := shp.Open("world/tz_world.shp")
if err != nil {
t.Fatalf("Error opening world/tz_world.shp: %v; unzip it from http://efele.net/maps/tz/world/tz_world.zip", err)
}
defer sr.Close()
for sr.Next() {
i, s := sr.Shape()
p, ok := s.(*shp.Polygon)
if !ok {
t.Fatalf("Unknown shape %T", p)
}
zoneName := sr.ReadAttribute(i, 0)
if zoneName == "uninhabited" {
continue
}
if _, err := time.LoadLocation(zoneName); err != nil {
t.Fatalf("Failed to load: %v (%v)", zoneName, err)
}
hash := crc32.Checksum([]byte(zoneName), tab)
col := color.RGBA{uint8(hash >> 24), uint8(hash >> 16), uint8(hash >> 8), 255}
if name, ok := zoneOfColor[col]; ok {
if name != zoneName {
log.Fatalf("Color %+v dup: %s and %s", col, name, zoneName)
}
} else {
zoneOfColor[col] = zoneName
}
var xys []int
for _, pt := range p.Points {
xys = append(xys, int((pt.X+180)*scale), int((90-pt.Y)*scale))
}
drawPoly(col, xys...)
}
// adjust point from scale 32 to whatever the user is using.
ap := func(x int) int { return x * int(scale) / 32 }
// Fix some rendering glitches:
// {186 205 234 255} = Europe/Rome
drawPoly(color.RGBA{186, 205, 234, 255},
ap(6156), ap(1468),
ap(6293), ap(1596),
ap(6293), ap(1598),
ap(6156), ap(1540))
// {136 136 180 255} = America/Boise
drawPoly(color.RGBA{136, 136, 180, 255},
ap(2145), ap(1468),
ap(2189), ap(1468),
ap(2189), ap(1536),
ap(2145), ap(1536))
// {120 247 14 255} = America/Denver
drawPoly(color.RGBA{120, 247, 14, 255},
ap(2167), ap(1536),
ap(2171), ap(1536),
ap(2217), ap(1714),
ap(2204), ap(1724),
ap(2160), ap(1537))
return
}
func (liner FtLineBuilder) LineTo(x, y float64) {
liner.Adder.Add1(raster.Point{X: raster.Fix32(x * 256), Y: raster.Fix32(y * 256)})
}
// pt returns the raster.Point corresponding to the pixel position (x, y).
func pt(x, y int) raster.Point {
return raster.Point{X: raster.Fix32(x << 8), Y: raster.Fix32(y << 8)}
}
func p(x, y int) raster.Point {
return raster.Point{
X: raster.Fix32(x * 256),
Y: raster.Fix32(y * 256),
}
}
func (obj *RasterItem) pt(p raster.Point) raster.Point {
return raster.Point{p.X + raster.Fix32(obj.rasterizer.Dx)<<fixBits, p.Y + raster.Fix32(obj.rasterizer.Dy)<<fixBits}
}
func float2fixed(f float64) raster.Fix32 {
if f < 0 {
return raster.Fix32(f*256 + 0.5)
}
return raster.Fix32(f*256 - 0.5)
}
func int2fix(i int) raster.Fix32 {
return raster.Fix32(i << fixBits)
}
func float2fix(f float64) raster.Fix32 {
return raster.Fix32(f*fixScale + 0.5)
}
func genGlyphs(font *truetype.Font, size int, text string) (glyphs []*glyph) {
scale := int32(float64(size) * dpi * (64.0 / 72.0))
clip := image.Rect(0, 0, width, height)
// Calculate the rasterizer's bounds to handle the largest glyph.
b := font.Bounds(scale)
xmin := int(b.XMin) >> 6
ymin := -int(b.YMax) >> 6
xmax := int(b.XMax+63) >> 6
ymax := -int(b.YMin-63) >> 6
r := raster.NewRasterizer(xmax-xmin, ymax-ymin)
buf := truetype.NewGlyphBuf()
for _, variant := range []string{strings.ToUpper(text), strings.ToLower(text)} {
pt := Pt(30, 10+int(pointToFix32(float64(size))>>8))
for _, char := range variant {
idx := font.Index(char)
buf.Load(font, scale, idx, truetype.FullHinting)
// Calculate the integer-pixel bounds for the glyph.
xmin := int(raster.Fix32(buf.B.XMin<<2)) >> 8
ymin := int(-raster.Fix32(buf.B.YMax<<2)) >> 8
xmax := int(raster.Fix32(buf.B.XMax<<2)+0xff) >> 8
ymax := int(-raster.Fix32(buf.B.YMin<<2)+0xff) >> 8
fx := raster.Fix32(-xmin << 8)
fy := raster.Fix32(-ymin << 8)
ix := int(pt.X >> 8)
iy := int(pt.Y >> 8)
// Rasterize the glyph's vectors.
r.Clear()
e0 := 0
for _, e1 := range buf.End {
drawContour(r, buf.Point[e0:e1], fx, fy)
e0 = e1
}
mask := image.NewAlpha(image.Rect(0, 0, xmax-xmin, ymax-ymin))
r.Rasterize(raster.NewAlphaSrcPainter(mask))
pt.X += raster.Fix32(buf.AdvanceWidth << 2)
offset := image.Point{xmin + ix, ymin + iy}
glyphRect := mask.Bounds().Add(offset)
dr := clip.Intersect(glyphRect)
mp := image.Point{0, dr.Min.Y - glyphRect.Min.Y}
glyphs = append(glyphs, &glyph{
mask: mask,
mp: mp,
dr: dr,
})
}
}
return
}
func fix32(x int) raster.Fix32 {
return raster.Fix32(x << 8)
}
func pixel2fixPoint(p image.Point) raster.Point {
return raster.Point{raster.Fix32(p.X << fixBits), raster.Fix32(p.Y << fixBits)}
}
func pointToFix32(x float64) raster.Fix32 {
return raster.Fix32(x * dpi * (256.0 / 72.0))
}