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This commit is contained in:
David Högborg
2016-05-12 17:35:15 +02:00
parent bdc9dac911
commit fcd62b3760
68 changed files with 11810 additions and 6 deletions
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27
vendor/golang.org/x/image/LICENSE generated vendored Normal file
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Copyright (c) 2009 The Go Authors. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following disclaimer
in the documentation and/or other materials provided with the
distribution.
* Neither the name of Google Inc. nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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vendor/golang.org/x/image/PATENTS generated vendored Normal file
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Additional IP Rights Grant (Patents)
"This implementation" means the copyrightable works distributed by
Google as part of the Go project.
Google hereby grants to You a perpetual, worldwide, non-exclusive,
no-charge, royalty-free, irrevocable (except as stated in this section)
patent license to make, have made, use, offer to sell, sell, import,
transfer and otherwise run, modify and propagate the contents of this
implementation of Go, where such license applies only to those patent
claims, both currently owned or controlled by Google and acquired in
the future, licensable by Google that are necessarily infringed by this
implementation of Go. This grant does not include claims that would be
infringed only as a consequence of further modification of this
implementation. If you or your agent or exclusive licensee institute or
order or agree to the institution of patent litigation against any
entity (including a cross-claim or counterclaim in a lawsuit) alleging
that this implementation of Go or any code incorporated within this
implementation of Go constitutes direct or contributory patent
infringement, or inducement of patent infringement, then any patent
rights granted to you under this License for this implementation of Go
shall terminate as of the date such litigation is filed.

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vendor/golang.org/x/image/font/font.go generated vendored Normal file
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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package font defines an interface for font faces, for drawing text on an
// image.
//
// Other packages provide font face implementations. For example, a truetype
// package would provide one based on .ttf font files.
package font
import (
"image"
"image/draw"
"io"
"golang.org/x/image/math/fixed"
)
// TODO: who is responsible for caches (glyph images, glyph indices, kerns)?
// The Drawer or the Face?
// Face is a font face. Its glyphs are often derived from a font file, such as
// "Comic_Sans_MS.ttf", but a face has a specific size, style, weight and
// hinting. For example, the 12pt and 18pt versions of Comic Sans are two
// different faces, even if derived from the same font file.
//
// A Face is not safe for concurrent use by multiple goroutines, as its methods
// may re-use implementation-specific caches and mask image buffers.
//
// To create a Face, look to other packages that implement specific font file
// formats.
type Face interface {
io.Closer
// Glyph returns the draw.DrawMask parameters (dr, mask, maskp) to draw r's
// glyph at the sub-pixel destination location dot, and that glyph's
// advance width.
//
// It returns !ok if the face does not contain a glyph for r.
//
// The contents of the mask image returned by one Glyph call may change
// after the next Glyph call. Callers that want to cache the mask must make
// a copy.
Glyph(dot fixed.Point26_6, r rune) (
dr image.Rectangle, mask image.Image, maskp image.Point, advance fixed.Int26_6, ok bool)
// GlyphBounds returns the bounding box of r's glyph, drawn at a dot equal
// to the origin, and that glyph's advance width.
//
// It returns !ok if the face does not contain a glyph for r.
//
// The glyph's ascent and descent equal -bounds.Min.Y and +bounds.Max.Y. A
// visual depiction of what these metrics are is at
// https://developer.apple.com/library/mac/documentation/TextFonts/Conceptual/CocoaTextArchitecture/Art/glyph_metrics_2x.png
GlyphBounds(r rune) (bounds fixed.Rectangle26_6, advance fixed.Int26_6, ok bool)
// GlyphAdvance returns the advance width of r's glyph.
//
// It returns !ok if the face does not contain a glyph for r.
GlyphAdvance(r rune) (advance fixed.Int26_6, ok bool)
// Kern returns the horizontal adjustment for the kerning pair (r0, r1). A
// positive kern means to move the glyphs further apart.
Kern(r0, r1 rune) fixed.Int26_6
// Metrics returns the metrics for this Face.
Metrics() Metrics
// TODO: ColoredGlyph for various emoji?
// TODO: Ligatures? Shaping?
}
// Metrics holds the metrics for a Face. A visual depiction is at
// https://developer.apple.com/library/mac/documentation/TextFonts/Conceptual/CocoaTextArchitecture/Art/glyph_metrics_2x.png
type Metrics struct {
// Height is the recommended amount of vertical space between two lines of
// text.
Height fixed.Int26_6
// Ascent is the distance from the top of a line to its baseline.
Ascent fixed.Int26_6
// Descent is the distance from the bottom of a line to its baseline. The
// value is typically positive, even though a descender goes below the
// baseline.
Descent fixed.Int26_6
}
// TODO: Drawer.Layout or Drawer.Measure methods to measure text without
// drawing?
// Drawer draws text on a destination image.
//
// A Drawer is not safe for concurrent use by multiple goroutines, since its
// Face is not.
type Drawer struct {
// Dst is the destination image.
Dst draw.Image
// Src is the source image.
Src image.Image
// Face provides the glyph mask images.
Face Face
// Dot is the baseline location to draw the next glyph. The majority of the
// affected pixels will be above and to the right of the dot, but some may
// be below or to the left. For example, drawing a 'j' in an italic face
// may affect pixels below and to the left of the dot.
Dot fixed.Point26_6
// TODO: Clip image.Image?
// TODO: SrcP image.Point for Src images other than *image.Uniform? How
// does it get updated during DrawString?
}
// TODO: should DrawString return the last rune drawn, so the next DrawString
// call can kern beforehand? Or should that be the responsibility of the caller
// if they really want to do that, since they have to explicitly shift d.Dot
// anyway?
//
// In general, we'd have a DrawBytes([]byte) and DrawRuneReader(io.RuneReader)
// and the last case can't assume that you can rewind the stream.
//
// TODO: how does this work with line breaking: drawing text up until a
// vertical line? Should DrawString return the number of runes drawn?
// DrawString draws s at the dot and advances the dot's location.
func (d *Drawer) DrawString(s string) {
var prevC rune
for i, c := range s {
if i != 0 {
d.Dot.X += d.Face.Kern(prevC, c)
}
dr, mask, maskp, advance, ok := d.Face.Glyph(d.Dot, c)
if !ok {
// TODO: is falling back on the U+FFFD glyph the responsibility of
// the Drawer or the Face?
// TODO: set prevC = '\ufffd'?
continue
}
draw.DrawMask(d.Dst, dr, d.Src, image.Point{}, mask, maskp, draw.Over)
d.Dot.X += advance
prevC = c
}
}
// MeasureString returns how far dot would advance by drawing s.
func (d *Drawer) MeasureString(s string) (advance fixed.Int26_6) {
return MeasureString(d.Face, s)
}
// MeasureString returns how far dot would advance by drawing s with f.
func MeasureString(f Face, s string) (advance fixed.Int26_6) {
var prevC rune
for i, c := range s {
if i != 0 {
advance += f.Kern(prevC, c)
}
a, ok := f.GlyphAdvance(c)
if !ok {
// TODO: is falling back on the U+FFFD glyph the responsibility of
// the Drawer or the Face?
// TODO: set prevC = '\ufffd'?
continue
}
advance += a
prevC = c
}
return advance
}
// Hinting selects how to quantize a vector font's glyph nodes.
//
// Not all fonts support hinting.
type Hinting int
const (
HintingNone Hinting = iota
HintingVertical
HintingFull
)
// Stretch selects a normal, condensed, or expanded face.
//
// Not all fonts support stretches.
type Stretch int
const (
StretchUltraCondensed Stretch = -4
StretchExtraCondensed Stretch = -3
StretchCondensed Stretch = -2
StretchSemiCondensed Stretch = -1
StretchNormal Stretch = +0
StretchSemiExpanded Stretch = +1
StretchExpanded Stretch = +2
StretchExtraExpanded Stretch = +3
StretchUltraExpanded Stretch = +4
)
// Style selects a normal, italic, or oblique face.
//
// Not all fonts support styles.
type Style int
const (
StyleNormal Style = iota
StyleItalic
StyleOblique
)
// Weight selects a normal, light or bold face.
//
// Not all fonts support weights.
//
// The named Weight constants (e.g. WeightBold) correspond to CSS' common
// weight names (e.g. "Bold"), but the numerical values differ, so that in Go,
// the zero value means to use a normal weight. For the CSS names and values,
// see https://developer.mozilla.org/en/docs/Web/CSS/font-weight
type Weight int
const (
WeightThin Weight = -3 // CSS font-weight value 100.
WeightExtraLight Weight = -2 // CSS font-weight value 200.
WeightLight Weight = -1 // CSS font-weight value 300.
WeightNormal Weight = +0 // CSS font-weight value 400.
WeightMedium Weight = +1 // CSS font-weight value 500.
WeightSemiBold Weight = +2 // CSS font-weight value 600.
WeightBold Weight = +3 // CSS font-weight value 700.
WeightExtraBold Weight = +4 // CSS font-weight value 800.
WeightBlack Weight = +5 // CSS font-weight value 900.
)

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vendor/golang.org/x/image/math/fixed/fixed.go generated vendored Normal file
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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package fixed implements fixed-point integer types.
package fixed
import (
"fmt"
)
// TODO: implement fmt.Formatter for %f and %g.
// I returns the integer value i as an Int26_6.
//
// For example, passing the integer value 2 yields Int26_6(128).
func I(i int) Int26_6 {
return Int26_6(i << 6)
}
// Int26_6 is a signed 26.6 fixed-point number.
//
// The integer part ranges from -33554432 to 33554431, inclusive. The
// fractional part has 6 bits of precision.
//
// For example, the number one-and-a-quarter is Int26_6(1<<6 + 1<<4).
type Int26_6 int32
// String returns a human-readable representation of a 26.6 fixed-point number.
//
// For example, the number one-and-a-quarter becomes "1:16".
func (x Int26_6) String() string {
const shift, mask = 6, 1<<6 - 1
if x >= 0 {
return fmt.Sprintf("%d:%02d", int32(x>>shift), int32(x&mask))
}
x = -x
if x >= 0 {
return fmt.Sprintf("-%d:%02d", int32(x>>shift), int32(x&mask))
}
return "-33554432:00" // The minimum value is -(1<<25).
}
// Floor returns the greatest integer value less than or equal to x.
//
// Its return type is int, not Int26_6.
func (x Int26_6) Floor() int { return int((x + 0x00) >> 6) }
// Round returns the nearest integer value to x. Ties are rounded up.
//
// Its return type is int, not Int26_6.
func (x Int26_6) Round() int { return int((x + 0x20) >> 6) }
// Ceil returns the least integer value greater than or equal to x.
//
// Its return type is int, not Int26_6.
func (x Int26_6) Ceil() int { return int((x + 0x3f) >> 6) }
// Int52_12 is a signed 52.12 fixed-point number.
//
// The integer part ranges from -2251799813685248 to 2251799813685247,
// inclusive. The fractional part has 12 bits of precision.
//
// For example, the number one-and-a-quarter is Int52_12(1<<12 + 1<<10).
type Int52_12 int64
// String returns a human-readable representation of a 52.12 fixed-point
// number.
//
// For example, the number one-and-a-quarter becomes "1:1024".
func (x Int52_12) String() string {
const shift, mask = 12, 1<<12 - 1
if x >= 0 {
return fmt.Sprintf("%d:%04d", int64(x>>shift), int64(x&mask))
}
x = -x
if x >= 0 {
return fmt.Sprintf("-%d:%04d", int64(x>>shift), int64(x&mask))
}
return "-2251799813685248:0000" // The minimum value is -(1<<51).
}
// Floor returns the greatest integer value less than or equal to x.
//
// Its return type is int, not Int52_12.
func (x Int52_12) Floor() int { return int((x + 0x000) >> 12) }
// Round returns the nearest integer value to x. Ties are rounded up.
//
// Its return type is int, not Int52_12.
func (x Int52_12) Round() int { return int((x + 0x800) >> 12) }
// Ceil returns the least integer value greater than or equal to x.
//
// Its return type is int, not Int52_12.
func (x Int52_12) Ceil() int { return int((x + 0xfff) >> 12) }
// P returns the integer values x and y as a Point26_6.
//
// For example, passing the integer values (2, -3) yields Point26_6{128, -192}.
func P(x, y int) Point26_6 {
return Point26_6{Int26_6(x << 6), Int26_6(y << 6)}
}
// Point26_6 is a 26.6 fixed-point coordinate pair.
//
// It is analogous to the image.Point type in the standard library.
type Point26_6 struct {
X, Y Int26_6
}
// Add returns the vector p+q.
func (p Point26_6) Add(q Point26_6) Point26_6 {
return Point26_6{p.X + q.X, p.Y + q.Y}
}
// Sub returns the vector p-q.
func (p Point26_6) Sub(q Point26_6) Point26_6 {
return Point26_6{p.X - q.X, p.Y - q.Y}
}
// Mul returns the vector p*k.
func (p Point26_6) Mul(k Int26_6) Point26_6 {
return Point26_6{p.X * k / 64, p.Y * k / 64}
}
// Div returns the vector p/k.
func (p Point26_6) Div(k Int26_6) Point26_6 {
return Point26_6{p.X * 64 / k, p.Y * 64 / k}
}
// Point52_12 is a 52.12 fixed-point coordinate pair.
//
// It is analogous to the image.Point type in the standard library.
type Point52_12 struct {
X, Y Int52_12
}
// Add returns the vector p+q.
func (p Point52_12) Add(q Point52_12) Point52_12 {
return Point52_12{p.X + q.X, p.Y + q.Y}
}
// Sub returns the vector p-q.
func (p Point52_12) Sub(q Point52_12) Point52_12 {
return Point52_12{p.X - q.X, p.Y - q.Y}
}
// Mul returns the vector p*k.
func (p Point52_12) Mul(k Int52_12) Point52_12 {
return Point52_12{p.X * k / 4096, p.Y * k / 4096}
}
// Div returns the vector p/k.
func (p Point52_12) Div(k Int52_12) Point52_12 {
return Point52_12{p.X * 4096 / k, p.Y * 4096 / k}
}
// R returns the integer values minX, minY, maxX, maxY as a Rectangle26_6.
//
// For example, passing the integer values (0, 1, 2, 3) yields
// Rectangle26_6{Point26_6{0, 64}, Point26_6{128, 192}}.
//
// Like the image.Rect function in the standard library, the returned rectangle
// has minimum and maximum coordinates swapped if necessary so that it is
// well-formed.
func R(minX, minY, maxX, maxY int) Rectangle26_6 {
if minX > maxX {
minX, maxX = maxX, minX
}
if minY > maxY {
minY, maxY = maxY, minY
}
return Rectangle26_6{
Point26_6{
Int26_6(minX << 6),
Int26_6(minY << 6),
},
Point26_6{
Int26_6(maxX << 6),
Int26_6(maxY << 6),
},
}
}
// Rectangle26_6 is a 26.6 fixed-point coordinate rectangle. The Min bound is
// inclusive and the Max bound is exclusive. It is well-formed if Min.X <=
// Max.X and likewise for Y.
//
// It is analogous to the image.Rectangle type in the standard library.
type Rectangle26_6 struct {
Min, Max Point26_6
}
// Rectangle52_12 is a 52.12 fixed-point coordinate rectangle. The Min bound is
// inclusive and the Max bound is exclusive. It is well-formed if Min.X <=
// Max.X and likewise for Y.
//
// It is analogous to the image.Rectangle type in the standard library.
type Rectangle52_12 struct {
Min, Max Point52_12
}