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Add internals/affine

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This commit is contained in:
Hajime Hoshi 2016-11-01 00:13:19 +09:00
parent d93d433514
commit 84baee8ca7
7 changed files with 385 additions and 205 deletions
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143
colorm.go
View File

@ -15,48 +15,11 @@
package ebiten
import (
"math"
"github.com/hajimehoshi/ebiten/internal/endian"
"github.com/hajimehoshi/ebiten/internal/affine"
)
// ColorMDim is a dimension of a ColorM.
const ColorMDim = 5
func uint64ToBytes(value uint64) []uint8 {
result := make([]uint8, 8)
if endian.IsLittle() {
for i := 0; i < 8; i++ {
result[i] = uint8(value)
value >>= 8
}
} else {
for i := 7; 0 <= i; i-- {
result[i] = uint8(value)
value >>= 8
}
}
return result
}
func colorMValueString(values [ColorMDim - 1][ColorMDim]float64) string {
b := make([]uint8, 0, (ColorMDim-1)*(ColorMDim)*8)
for i := 0; i < ColorMDim-1; i++ {
for j := 0; j < ColorMDim; j++ {
b = append(b, uint64ToBytes(math.Float64bits(values[i][j]))...)
}
}
return string(b)
}
var (
colorMIdentityValue = colorMValueString([ColorMDim - 1][ColorMDim]float64{
{1, 0, 0, 0, 0},
{0, 1, 0, 0, 0},
{0, 0, 1, 0, 0},
{0, 0, 0, 1, 0},
})
)
const ColorMDim = affine.ColorMDim
// A ColorM represents a matrix to transform coloring when rendering an image.
//
@ -67,76 +30,35 @@ var (
//
// The initial value is identity.
type ColorM struct {
// when values is empty, this matrix is identity.
values string
}
func (c *ColorM) dim() int {
return ColorMDim
impl affine.ColorM
}
// Concat multiplies a color matrix with the other color matrix.
// This is same as muptiplying the matrix other and the matrix c in this order.
func (c *ColorM) Concat(other ColorM) {
result := ColorM{}
mul(&other, c, &result)
*c = result
c.impl.Concat(other.impl)
}
// Add adds a color matrix with the other color matrix.
func (c *ColorM) Add(other ColorM) {
result := ColorM{}
add(&other, c, &result)
*c = result
c.impl.Add(other.impl)
}
// Scale scales the matrix by (r, g, b, a).
func (c *ColorM) Scale(r, g, b, a float64) {
for i := 0; i < ColorMDim-1; i++ {
c.SetElement(0, i, c.Element(0, i)*r)
c.SetElement(1, i, c.Element(1, i)*g)
c.SetElement(2, i, c.Element(2, i)*b)
c.SetElement(3, i, c.Element(3, i)*a)
}
c.impl.Scale(r, g, b, a)
}
// Translate translates the matrix by (r, g, b, a).
func (c *ColorM) Translate(r, g, b, a float64) {
c.SetElement(0, 4, c.Element(0, 4)+r)
c.SetElement(1, 4, c.Element(1, 4)+g)
c.SetElement(2, 4, c.Element(2, 4)+b)
c.SetElement(3, 4, c.Element(3, 4)+a)
c.impl.Translate(r, g, b, a)
}
// RotateHue rotates the hue.
func (c *ColorM) RotateHue(theta float64) {
c.ChangeHSV(theta, 1, 1)
c.impl.RotateHue(theta)
}
var (
// The YCbCr value ranges are:
// Y: [ 0 - 1 ]
// Cb: [-0.5 - 0.5]
// Cr: [-0.5 - 0.5]
rgbToYCbCr = ColorM{
values: colorMValueString([ColorMDim - 1][ColorMDim]float64{
{0.2990, 0.5870, 0.1140, 0, 0},
{-0.1687, -0.3313, 0.5000, 0, 0},
{0.5000, -0.4187, -0.0813, 0, 0},
{0, 0, 0, 1, 0},
}),
}
yCbCrToRgb = ColorM{
values: colorMValueString([ColorMDim - 1][ColorMDim]float64{
{1, 0, 1.40200, 0, 0},
{1, -0.34414, -0.71414, 0, 0},
{1, 1.77200, 0, 0, 0},
{0, 0, 0, 1, 0},
}),
}
)
// ChangeHSV changes HSV (Hue-Saturation-Value) values.
// hueTheta is a radian value to ratate hue.
// saturationScale is a value to scale saturation.
@ -144,60 +66,35 @@ var (
//
// This conversion uses RGB to/from YCrCb conversion.
func (c *ColorM) ChangeHSV(hueTheta float64, saturationScale float64, valueScale float64) {
sin, cos := math.Sincos(hueTheta)
c.Concat(rgbToYCbCr)
c.Concat(ColorM{
values: colorMValueString([ColorMDim - 1][ColorMDim]float64{
{1, 0, 0, 0, 0},
{0, cos, -sin, 0, 0},
{0, sin, cos, 0, 0},
{0, 0, 0, 1, 0},
}),
})
s := saturationScale
v := valueScale
c.Scale(v, s*v, s*v, 1)
c.Concat(yCbCrToRgb)
c.impl.ChangeHSV(hueTheta, saturationScale, valueScale)
}
var monochrome ColorM
// Element returns a value of a matrix at (i, j).
func (c *ColorM) Element(i, j int) float64 {
return c.impl.Element(i, j)
}
func init() {
monochrome.ChangeHSV(0, 0, 1)
// SetElement sets an element at (i, j).
func (c *ColorM) SetElement(i, j int, value float64) {
c.impl.SetElement(i, j, value)
}
// Monochrome returns a color matrix to make an image monochrome.
func Monochrome() ColorM {
return monochrome
return ColorM{affine.Monochrome()}
}
// ScaleColor is deprecated as of 1.2.0-alpha. Use Scale instead.
func ScaleColor(r, g, b, a float64) ColorM {
return ColorM{
values: colorMValueString([ColorMDim - 1][ColorMDim]float64{
{r, 0, 0, 0, 0},
{0, g, 0, 0, 0},
{0, 0, b, 0, 0},
{0, 0, 0, a, 0},
}),
}
return ColorM{affine.ScaleColor(r, g, b, a)}
}
// TranslateColor is deprecated as of 1.2.0-alpha. Use Translate instead.
func TranslateColor(r, g, b, a float64) ColorM {
return ColorM{
values: colorMValueString([ColorMDim - 1][ColorMDim]float64{
{1, 0, 0, 0, r},
{0, 1, 0, 0, g},
{0, 0, 1, 0, b},
{0, 0, 0, 1, a},
}),
}
return ColorM{affine.TranslateColor(r, g, b, a)}
}
// RotateHue is deprecated as of 1.2.0-alpha. Use RotateHue member function instead.
func RotateHue(theta float64) ColorM {
c := ColorM{}
c.RotateHue(theta)
return c
return ColorM{affine.RotateHue(theta)}
}

92
geom.go
View File

@ -15,132 +15,66 @@
package ebiten
import (
"math"
"github.com/hajimehoshi/ebiten/internal/affine"
)
// GeoMDim is a dimension of a GeoM.
const GeoMDim = 3
const GeoMDim = affine.GeoMDim
// A GeoM represents a matrix to transform geometry when rendering an image.
//
// The initial value is identity.
type GeoM struct {
initialized bool
es [GeoMDim - 1][GeoMDim]float64
}
func (g *GeoM) dim() int {
return GeoMDim
}
func (g *GeoM) initialize() {
g.initialized = true
g.es[0][0] = 1
g.es[1][1] = 1
impl affine.GeoM
}
// Element returns a value of a matrix at (i, j).
func (g *GeoM) Element(i, j int) float64 {
if !g.initialized {
if i == j {
return 1
}
return 0
}
return g.es[i][j]
return g.impl.Element(i, j)
}
// Concat multiplies a geometry matrix with the other geometry matrix.
// This is same as muptiplying the matrix other and the matrix g in this order.
func (g *GeoM) Concat(other GeoM) {
if !g.initialized {
g.initialize()
}
result := GeoM{}
mul(&other, g, &result)
*g = result
g.impl.Concat(other.impl)
}
// Add adds a geometry matrix with the other geometry matrix.
func (g *GeoM) Add(other GeoM) {
if !g.initialized {
g.initialize()
}
result := GeoM{}
add(&other, g, &result)
*g = result
g.impl.Add(other.impl)
}
// Scale scales the matrix by (x, y).
func (g *GeoM) Scale(x, y float64) {
if !g.initialized {
g.initialize()
}
for i := 0; i < GeoMDim; i++ {
g.es[0][i] *= x
g.es[1][i] *= y
}
g.impl.Scale(x, y)
}
// Translate translates the matrix by (x, y).
func (g *GeoM) Translate(tx, ty float64) {
if !g.initialized {
g.initialize()
}
g.es[0][2] += tx
g.es[1][2] += ty
g.impl.Translate(tx, ty)
}
// Rotate rotates the matrix by theta.
func (g *GeoM) Rotate(theta float64) {
sin, cos := math.Sincos(theta)
g.Concat(GeoM{
initialized: true,
es: [2][3]float64{
{cos, -sin, 0},
{sin, cos, 0},
},
})
g.impl.Rotate(theta)
}
// SetElement sets an element at (i, j).
func (g *GeoM) SetElement(i, j int, element float64) {
if !g.initialized {
g.initialize()
}
g.es[i][j] = element
g.impl.SetElement(i, j, element)
}
// ScaleGeo is deprecated as of 1.2.0-alpha. Use Scale instead.
func ScaleGeo(x, y float64) GeoM {
return GeoM{
initialized: true,
es: [2][3]float64{
{x, 0, 0},
{0, y, 0},
},
}
return GeoM{affine.ScaleGeo(x, y)}
}
// TranslateGeo is deprecated as of 1.2.0-alpha. Use Translate instead.
func TranslateGeo(tx, ty float64) GeoM {
return GeoM{
initialized: true,
es: [2][3]float64{
{1, 0, tx},
{0, 1, ty},
},
}
return GeoM{affine.TranslateGeo(tx, ty)}
}
// RotateGeo is deprecated as of 1.2.0-alpha. Use Rotate instead.
func RotateGeo(theta float64) GeoM {
sin, cos := math.Sincos(theta)
return GeoM{
initialized: true,
es: [2][3]float64{
{cos, -sin, 0},
{sin, cos, 0},
},
}
return GeoM{affine.RotateGeo(theta)}
}

2
affine.go → internal/affine/affine.go
View File

@ -12,7 +12,7 @@
// See the License for the specific language governing permissions and
// limitations under the License.
package ebiten
package affine
type affine interface {
dim() int

203
internal/affine/colorm.go Normal file
View File

@ -0,0 +1,203 @@
// Copyright 2014 Hajime Hoshi
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package affine
import (
"math"
"github.com/hajimehoshi/ebiten/internal/endian"
)
// ColorMDim is a dimension of a ColorM.
const ColorMDim = 5
func uint64ToBytes(value uint64) []uint8 {
result := make([]uint8, 8)
if endian.IsLittle() {
for i := 0; i < 8; i++ {
result[i] = uint8(value)
value >>= 8
}
} else {
for i := 7; 0 <= i; i-- {
result[i] = uint8(value)
value >>= 8
}
}
return result
}
func colorMValueString(values [ColorMDim - 1][ColorMDim]float64) string {
b := make([]uint8, 0, (ColorMDim-1)*(ColorMDim)*8)
for i := 0; i < ColorMDim-1; i++ {
for j := 0; j < ColorMDim; j++ {
b = append(b, uint64ToBytes(math.Float64bits(values[i][j]))...)
}
}
return string(b)
}
var (
colorMIdentityValue = colorMValueString([ColorMDim - 1][ColorMDim]float64{
{1, 0, 0, 0, 0},
{0, 1, 0, 0, 0},
{0, 0, 1, 0, 0},
{0, 0, 0, 1, 0},
})
)
// A ColorM represents a matrix to transform coloring when rendering an image.
//
// A ColorM is applied to the source alpha color
// while an Image's pixels' format is alpha premultiplied.
// Before applying a matrix, a color is un-multiplied, and after applying the matrix,
// the color is multiplied again.
//
// The initial value is identity.
type ColorM struct {
// when values is empty, this matrix is identity.
values string
}
func (c *ColorM) dim() int {
return ColorMDim
}
// Concat multiplies a color matrix with the other color matrix.
// This is same as muptiplying the matrix other and the matrix c in this order.
func (c *ColorM) Concat(other ColorM) {
result := ColorM{}
mul(&other, c, &result)
*c = result
}
// Add adds a color matrix with the other color matrix.
func (c *ColorM) Add(other ColorM) {
result := ColorM{}
add(&other, c, &result)
*c = result
}
// Scale scales the matrix by (r, g, b, a).
func (c *ColorM) Scale(r, g, b, a float64) {
for i := 0; i < ColorMDim-1; i++ {
c.SetElement(0, i, c.Element(0, i)*r)
c.SetElement(1, i, c.Element(1, i)*g)
c.SetElement(2, i, c.Element(2, i)*b)
c.SetElement(3, i, c.Element(3, i)*a)
}
}
// Translate translates the matrix by (r, g, b, a).
func (c *ColorM) Translate(r, g, b, a float64) {
c.SetElement(0, 4, c.Element(0, 4)+r)
c.SetElement(1, 4, c.Element(1, 4)+g)
c.SetElement(2, 4, c.Element(2, 4)+b)
c.SetElement(3, 4, c.Element(3, 4)+a)
}
// RotateHue rotates the hue.
func (c *ColorM) RotateHue(theta float64) {
c.ChangeHSV(theta, 1, 1)
}
var (
// The YCbCr value ranges are:
// Y: [ 0 - 1 ]
// Cb: [-0.5 - 0.5]
// Cr: [-0.5 - 0.5]
rgbToYCbCr = ColorM{
values: colorMValueString([ColorMDim - 1][ColorMDim]float64{
{0.2990, 0.5870, 0.1140, 0, 0},
{-0.1687, -0.3313, 0.5000, 0, 0},
{0.5000, -0.4187, -0.0813, 0, 0},
{0, 0, 0, 1, 0},
}),
}
yCbCrToRgb = ColorM{
values: colorMValueString([ColorMDim - 1][ColorMDim]float64{
{1, 0, 1.40200, 0, 0},
{1, -0.34414, -0.71414, 0, 0},
{1, 1.77200, 0, 0, 0},
{0, 0, 0, 1, 0},
}),
}
)
// ChangeHSV changes HSV (Hue-Saturation-Value) values.
// hueTheta is a radian value to ratate hue.
// saturationScale is a value to scale saturation.
// valueScale is a value to scale value (a.k.a. brightness).
//
// This conversion uses RGB to/from YCrCb conversion.
func (c *ColorM) ChangeHSV(hueTheta float64, saturationScale float64, valueScale float64) {
sin, cos := math.Sincos(hueTheta)
c.Concat(rgbToYCbCr)
c.Concat(ColorM{
values: colorMValueString([ColorMDim - 1][ColorMDim]float64{
{1, 0, 0, 0, 0},
{0, cos, -sin, 0, 0},
{0, sin, cos, 0, 0},
{0, 0, 0, 1, 0},
}),
})
s := saturationScale
v := valueScale
c.Scale(v, s*v, s*v, 1)
c.Concat(yCbCrToRgb)
}
var monochrome ColorM
func init() {
monochrome.ChangeHSV(0, 0, 1)
}
// Monochrome returns a color matrix to make an image monochrome.
func Monochrome() ColorM {
return monochrome
}
// ScaleColor is deprecated as of 1.2.0-alpha. Use Scale instead.
func ScaleColor(r, g, b, a float64) ColorM {
return ColorM{
values: colorMValueString([ColorMDim - 1][ColorMDim]float64{
{r, 0, 0, 0, 0},
{0, g, 0, 0, 0},
{0, 0, b, 0, 0},
{0, 0, 0, a, 0},
}),
}
}
// TranslateColor is deprecated as of 1.2.0-alpha. Use Translate instead.
func TranslateColor(r, g, b, a float64) ColorM {
return ColorM{
values: colorMValueString([ColorMDim - 1][ColorMDim]float64{
{1, 0, 0, 0, r},
{0, 1, 0, 0, g},
{0, 0, 1, 0, b},
{0, 0, 0, 1, a},
}),
}
}
// RotateHue is deprecated as of 1.2.0-alpha. Use RotateHue member function instead.
func RotateHue(theta float64) ColorM {
c := ColorM{}
c.RotateHue(theta)
return c
}

2
colorm_js.go → internal/affine/colorm_js.go
View File

@ -14,7 +14,7 @@
// +build js
package ebiten
package affine
import (
"github.com/gopherjs/gopherjs/js"

2
colorm_nojs.go → internal/affine/colorm_nojs.go
View File

@ -14,7 +14,7 @@
// +build !js
package ebiten
package affine
import (
"math"

146
internal/affine/geom.go Normal file
View File

@ -0,0 +1,146 @@
// Copyright 2014 Hajime Hoshi
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package affine
import (
"math"
)
// GeoMDim is a dimension of a GeoM.
const GeoMDim = 3
// A GeoM represents a matrix to transform geometry when rendering an image.
//
// The initial value is identity.
type GeoM struct {
initialized bool
es [GeoMDim - 1][GeoMDim]float64
}
func (g *GeoM) dim() int {
return GeoMDim
}
func (g *GeoM) initialize() {
g.initialized = true
g.es[0][0] = 1
g.es[1][1] = 1
}
// Element returns a value of a matrix at (i, j).
func (g *GeoM) Element(i, j int) float64 {
if !g.initialized {
if i == j {
return 1
}
return 0
}
return g.es[i][j]
}
// Concat multiplies a geometry matrix with the other geometry matrix.
// This is same as muptiplying the matrix other and the matrix g in this order.
func (g *GeoM) Concat(other GeoM) {
if !g.initialized {
g.initialize()
}
result := GeoM{}
mul(&other, g, &result)
*g = result
}
// Add adds a geometry matrix with the other geometry matrix.
func (g *GeoM) Add(other GeoM) {
if !g.initialized {
g.initialize()
}
result := GeoM{}
add(&other, g, &result)
*g = result
}
// Scale scales the matrix by (x, y).
func (g *GeoM) Scale(x, y float64) {
if !g.initialized {
g.initialize()
}
for i := 0; i < GeoMDim; i++ {
g.es[0][i] *= x
g.es[1][i] *= y
}
}
// Translate translates the matrix by (x, y).
func (g *GeoM) Translate(tx, ty float64) {
if !g.initialized {
g.initialize()
}
g.es[0][2] += tx
g.es[1][2] += ty
}
// Rotate rotates the matrix by theta.
func (g *GeoM) Rotate(theta float64) {
sin, cos := math.Sincos(theta)
g.Concat(GeoM{
initialized: true,
es: [2][3]float64{
{cos, -sin, 0},
{sin, cos, 0},
},
})
}
// SetElement sets an element at (i, j).
func (g *GeoM) SetElement(i, j int, element float64) {
if !g.initialized {
g.initialize()
}
g.es[i][j] = element
}
// ScaleGeo is deprecated as of 1.2.0-alpha. Use Scale instead.
func ScaleGeo(x, y float64) GeoM {
return GeoM{
initialized: true,
es: [2][3]float64{
{x, 0, 0},
{0, y, 0},
},
}
}
// TranslateGeo is deprecated as of 1.2.0-alpha. Use Translate instead.
func TranslateGeo(tx, ty float64) GeoM {
return GeoM{
initialized: true,
es: [2][3]float64{
{1, 0, tx},
{0, 1, ty},
},
}
}
// RotateGeo is deprecated as of 1.2.0-alpha. Use Rotate instead.
func RotateGeo(theta float64) GeoM {
sin, cos := math.Sincos(theta)
return GeoM{
initialized: true,
es: [2][3]float64{
{cos, -sin, 0},
{sin, cos, 0},
},
}
}