func uploadTexture_NRGBA32(img *image.NRGBA) gl.Texture {
b := img.Bounds()
data := make([]uint8, b.Max.X*b.Max.Y*4)
for y := 0; y < b.Max.Y; y++ {
for x := 0; x < b.Max.X; x++ {
p := img.At(x, y)
offset := y*b.Max.X*4 + x*4
r, g, b, a := p.RGBA()
data[offset+0] = uint8(r)
data[offset+1] = uint8(g)
data[offset+2] = uint8(b)
data[offset+3] = uint8(a)
}
}
id := gl.GenTexture()
id.Bind(gl.TEXTURE_2D)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_R, gl.CLAMP_TO_EDGE)
gl.TexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, b.Max.X, b.Max.Y, 0, gl.RGBA, gl.UNSIGNED_BYTE, data)
if gl.GetError() != gl.NO_ERROR {
id.Delete()
panic(errors.New("Failed to load a texture"))
return 0
}
return id
}
func invertImageNrgba(nrgba *image.NRGBA) {
bounds := nrgba.Bounds()
for y := bounds.Min.Y; y < bounds.Max.Y; y++ {
for x := bounds.Min.X; x < bounds.Max.X; x++ {
c := nrgba.At(x, y).(color.NRGBA)
c.R = 255 - c.R
c.G = 255 - c.G
c.B = 255 - c.B
nrgba.SetNRGBA(x, y, c)
}
}
}
func drawMotionMap(ske0, ske1 *image.NRGBA, m *MotionMap, shift *ShiftMap) (img *image.RGBA) {
bounds := ske0.Bounds().Intersect(ske1.Bounds()).Intersect(m.Bounds)
if shift != nil {
bounds = bounds.Intersect(shift.Bounds)
}
s := 10
img = image.NewRGBA(image.Rectangle{bounds.Min.Mul(s), bounds.Max.Mul(s)})
gc := draw2d.NewGraphicContext(img)
for y := img.Bounds().Min.Y; y < img.Bounds().Max.Y; y++ {
for x := img.Bounds().Min.X; x < img.Bounds().Max.X; x++ {
c := color.NRGBA{255, 255, 255, 255}
if ske0.At(x/s, y/s).(color.NRGBA).A > 0 {
c.R = 0
}
if ske1.At(x/s, y/s).(color.NRGBA).A > 0 {
c.G = 0
}
img.Set(x, y, c)
}
}
count := 0
for y := m.Bounds.Min.Y; y < m.Bounds.Max.Y; y++ {
for x := m.Bounds.Min.X; x < m.Bounds.Max.X; x++ {
v := GetMotion(m, x, y)
if v.X != 0 || v.Y != 0 {
cx, cy := x*s+s/2, y*s+s/2
dx, dy := v.X*s, v.Y*s
gc.SetStrokeColor(color.RGBA{0, 0, 0, 255})
gc.MoveTo(float64(cx), float64(cy))
gc.LineTo(float64(cx+dx), float64(cy+dy))
gc.Stroke()
count++
}
if shift != nil {
sv := GetShift(shift, x, y)
if sv.Dx != 0.0 || sv.Dy != 0.0 {
cx, cy := x*s+s/2, y*s+s/2
sf := float64(s)
//fmt.Println(x, y, sv)
gc.SetStrokeColor(color.RGBA{0, 200, 0, 255})
gc.MoveTo(float64(cx), float64(cy))
gc.LineTo(float64(cx)+sv.Dx*sf, float64(cy)+sv.Dy*sf)
gc.Stroke()
}
}
}
}
fmt.Println("count:", count)
return
}