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 Resized(ext string, data []byte, width, height int) (resized []byte, w int, h int) {
if width == 0 && height == 0 {
return data, 0, 0
}
srcImage, _, err := image.Decode(bytes.NewReader(data))
if err == nil {
bounds := srcImage.Bounds()
var dstImage *image.NRGBA
if bounds.Dx() > width && width != 0 || bounds.Dy() > height && height != 0 {
if width == height && bounds.Dx() != bounds.Dy() {
dstImage = imaging.Thumbnail(srcImage, width, height, imaging.Lanczos)
w, h = width, height
} else {
dstImage = imaging.Resize(srcImage, width, height, imaging.Lanczos)
}
} else {
return data, bounds.Dx(), bounds.Dy()
}
var buf bytes.Buffer
switch ext {
case ".png":
png.Encode(&buf, dstImage)
case ".jpg", ".jpeg":
jpeg.Encode(&buf, dstImage, nil)
case ".gif":
gif.Encode(&buf, dstImage, nil)
}
return buf.Bytes(), dstImage.Bounds().Dx(), dstImage.Bounds().Dy()
} else {
glog.Error(err)
}
return data, 0, 0
}
func resizeHorizontal(src *image.NRGBA, width int, filter ResampleFilter) *image.NRGBA {
srcBounds := src.Bounds()
srcW := srcBounds.Max.X
srcH := srcBounds.Max.Y
dstW := width
dstH := srcH
dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
weights := precomputeWeights(dstW, srcW, filter)
parallel(dstH, func(partStart, partEnd int) {
for dstY := partStart; dstY < partEnd; dstY++ {
for dstX := 0; dstX < dstW; dstX++ {
var c [4]int32
for _, iw := range weights[dstX].iwpairs {
i := dstY*src.Stride + iw.i*4
c[0] += int32(src.Pix[i+0]) * iw.w
c[1] += int32(src.Pix[i+1]) * iw.w
c[2] += int32(src.Pix[i+2]) * iw.w
c[3] += int32(src.Pix[i+3]) * iw.w
}
j := dstY*dst.Stride + dstX*4
sum := weights[dstX].wsum
dst.Pix[j+0] = clampint32(int32(float32(c[0])/float32(sum) + 0.5))
dst.Pix[j+1] = clampint32(int32(float32(c[1])/float32(sum) + 0.5))
dst.Pix[j+2] = clampint32(int32(float32(c[2])/float32(sum) + 0.5))
dst.Pix[j+3] = clampint32(int32(float32(c[3])/float32(sum) + 0.5))
}
}
})
return dst
}
// fast nearest-neighbor resize, no filtering
func resizeNearest(src *image.NRGBA, width, height int) *image.NRGBA {
dstW, dstH := width, height
srcBounds := src.Bounds()
srcW := srcBounds.Max.X
srcH := srcBounds.Max.Y
dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
dx := float64(srcW) / float64(dstW)
dy := float64(srcH) / float64(dstH)
Parallel(dstH, func(partStart, partEnd int) {
for dstY := partStart; dstY < partEnd; dstY++ {
fy := (float64(dstY)+0.5)*dy - 0.5
for dstX := 0; dstX < dstW; dstX++ {
fx := (float64(dstX)+0.5)*dx - 0.5
srcX := int(math.Min(math.Max(math.Floor(fx+0.5), 0.0), float64(srcW)))
srcY := int(math.Min(math.Max(math.Floor(fy+0.5), 0.0), float64(srcH)))
srcOff := srcY*src.Stride + srcX*4
dstOff := dstY*dst.Stride + dstX*4
copy(dst.Pix[dstOff:dstOff+4], src.Pix[srcOff:srcOff+4])
}
}
})
return dst
}
func Resize(context *common.AppContext, source *image.NRGBA, width, height int) *image.NRGBA {
//Naive nn resize.
destinationW, destinationH := width, height
sourceBounds := source.Bounds()
sourceW := sourceBounds.Max.X
sourceH := sourceBounds.Max.Y
destination := image.NewNRGBA(image.Rect(0, 0, destinationW, destinationH))
dx := float64(sourceW) / float64(destinationW)
dy := float64(sourceH) / float64(destinationH)
for destinationY := 0; destinationY < destinationH; destinationY++ {
fy := (float64(destinationY)+0.5)*dy - 0.5
for destinationX := 0; destinationX < destinationW; destinationX++ {
fx := (float64(destinationX)+0.5)*dx - 0.5
sourceX := int(math.Min(math.Max(math.Floor(fx+0.5), 0.0), float64(sourceW)))
sourceY := int(math.Min(math.Max(math.Floor(fy+0.5), 0.0), float64(sourceH)))
sourceOff := sourceY*source.Stride + sourceX*4
destinationOff := destinationY*destination.Stride + destinationX*4
copy(destination.Pix[destinationOff:destinationOff+4], source.Pix[sourceOff:sourceOff+4])
}
}
return destination
}
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.Pix[y*img.Stride+x]
offset := y*b.Max.X*4 + x*4
data[offset+0] = p.R
data[offset+1] = p.G
data[offset+2] = p.B
data[offset+3] = p.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, data)
if gl.GetError() != gl.NO_ERROR {
id.Delete()
panic(os.NewError("Failed to load a texture"))
return 0
}
return id
}
// Interpolate 4 interleaved uint8 per pixel images.
func interpolate4x8(src *image.NRGBA, dstW, dstH int) image.Image {
srcRect := src.Bounds()
srcW := srcRect.Dx()
srcH := srcRect.Dy()
ww, hh := uint64(dstW), uint64(dstH)
dx, dy := uint64(srcW), uint64(srcH)
n, sum := dx*dy, make([]uint64, 4*dstW*dstH)
for y := 0; y < srcH; y++ {
pixOffset := src.PixOffset(0, y)
for x := 0; x < srcW; x++ {
// Get the source pixel.
r64 := uint64(src.Pix[pixOffset+0])
g64 := uint64(src.Pix[pixOffset+1])
b64 := uint64(src.Pix[pixOffset+2])
a64 := uint64(src.Pix[pixOffset+3])
pixOffset += 4
// Spread the source pixel over 1 or more destination rows.
py := uint64(y) * hh
for remy := hh; remy > 0; {
qy := dy - (py % dy)
if qy > remy {
qy = remy
}
// Spread the source pixel over 1 or more destination columns.
px := uint64(x) * ww
index := 4 * ((py/dy)*ww + (px / dx))
for remx := ww; remx > 0; {
qx := dx - (px % dx)
if qx > remx {
qx = remx
}
qxy := qx * qy
sum[index+0] += r64 * qxy
sum[index+1] += g64 * qxy
sum[index+2] += b64 * qxy
sum[index+3] += a64 * qxy
index += 4
px += qx
remx -= qx
}
py += qy
remy -= qy
}
}
}
dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
for y := 0; y < dstH; y++ {
pixOffset := dst.PixOffset(0, y)
for x := 0; x < dstW; x++ {
dst.Pix[pixOffset+0] = uint8(sum[pixOffset+0] / n)
dst.Pix[pixOffset+1] = uint8(sum[pixOffset+1] / n)
dst.Pix[pixOffset+2] = uint8(sum[pixOffset+2] / n)
dst.Pix[pixOffset+3] = uint8(sum[pixOffset+3] / n)
pixOffset += 4
}
}
return dst
}
func resizeRGBA(in *image.RGBA, out *image.NRGBA, scale float64, coeffs []int16, offset []int, filterLength int) {
newBounds := out.Bounds()
maxX := in.Bounds().Dx() - 1
for x := newBounds.Min.X; x < newBounds.Max.X; x++ {
row := in.Pix[x*in.Stride:]
for y := newBounds.Min.Y; y < newBounds.Max.Y; y++ {
var rgba [4]int32
var sum int32
start := offset[y]
ci := y * filterLength
for i := 0; i < filterLength; i++ {
coeff := coeffs[ci+i]
if coeff != 0 {
xi := start + i
switch {
case uint(xi) < uint(maxX):
xi *= 4
case xi >= maxX:
xi = 4 * maxX
default:
xi = 0
}
r := uint32(row[xi+0])
g := uint32(row[xi+1])
b := uint32(row[xi+2])
a := uint32(row[xi+3])
// reverse alpha-premultiplication.
if a != 0 {
r *= 0xffff
r /= a
g *= 0xffff
g /= a
b *= 0xffff
b /= a
}
rgba[0] += int32(coeff) * int32(r)
rgba[1] += int32(coeff) * int32(g)
rgba[2] += int32(coeff) * int32(b)
rgba[3] += int32(coeff) * int32(a)
sum += int32(coeff)
}
}
xo := (y-newBounds.Min.Y)*out.Stride + (x-newBounds.Min.X)*4
out.Pix[xo+0] = clampUint8(rgba[0] / sum)
out.Pix[xo+1] = clampUint8(rgba[1] / sum)
out.Pix[xo+2] = clampUint8(rgba[2] / sum)
out.Pix[xo+3] = clampUint8(rgba[3] / sum)
}
}
}
func blurVertical(src *image.NRGBA, kernel []float64) *image.NRGBA {
radius := len(kernel) - 1
width := src.Bounds().Max.X
height := src.Bounds().Max.Y
dst := image.NewNRGBA(image.Rect(0, 0, width, height))
parallel(height, func(partStart, partEnd int) {
for y := partStart; y < partEnd; y++ {
start := y - radius
if start < 0 {
start = 0
}
end := y + radius
if end > height-1 {
end = height - 1
}
weightSum := 0.0
for iy := start; iy <= end; iy++ {
weightSum += kernel[absint(y-iy)]
}
for x := 0; x < width; x++ {
r, g, b, a := 0.0, 0.0, 0.0, 0.0
for iy := start; iy <= end; iy++ {
weight := kernel[absint(y-iy)]
i := iy*src.Stride + x*4
wa := float64(src.Pix[i+3]) * weight
r += float64(src.Pix[i+0]) * wa
g += float64(src.Pix[i+1]) * wa
b += float64(src.Pix[i+2]) * wa
a += wa
}
r = math.Min(math.Max(r/a, 0.0), 255.0)
g = math.Min(math.Max(g/a, 0.0), 255.0)
b = math.Min(math.Max(b/a, 0.0), 255.0)
a = math.Min(math.Max(a/weightSum, 0.0), 255.0)
j := y*dst.Stride + x*4
dst.Pix[j+0] = uint8(r + 0.5)
dst.Pix[j+1] = uint8(g + 0.5)
dst.Pix[j+2] = uint8(b + 0.5)
dst.Pix[j+3] = uint8(a + 0.5)
}
}
})
return dst
}
// Interpolate uint32/pixel images.
func interpolate1x32(src *image.NRGBA, dstW, dstH int) image.Image {
srcRect := src.Bounds()
srcW := srcRect.Dx()
srcH := srcRect.Dy()
ww, hh := uint64(dstW), uint64(dstH)
dx, dy := uint64(srcW), uint64(srcH)
n, sum := dx*dy, make([]uint64, dstW*dstH)
for y := 0; y < srcH; y++ {
pixOffset := src.PixOffset(0, y)
for x := 0; x < srcW; x++ {
// Get the source pixel.
val64 := uint64(binary.BigEndian.Uint32([]byte(src.Pix[pixOffset+0 : pixOffset+4])))
pixOffset += 4
// Spread the source pixel over 1 or more destination rows.
py := uint64(y) * hh
for remy := hh; remy > 0; {
qy := dy - (py % dy)
if qy > remy {
qy = remy
}
// Spread the source pixel over 1 or more destination columns.
px := uint64(x) * ww
index := (py/dy)*ww + (px / dx)
for remx := ww; remx > 0; {
qx := dx - (px % dx)
if qx > remx {
qx = remx
}
qxy := qx * qy
sum[index] += val64 * qxy
index++
px += qx
remx -= qx
}
py += qy
remy -= qy
}
}
}
dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
index := 0
for y := 0; y < dstH; y++ {
pixOffset := dst.PixOffset(0, y)
for x := 0; x < dstW; x++ {
binary.BigEndian.PutUint32(dst.Pix[pixOffset+0:pixOffset+4], uint32(sum[index]/n))
pixOffset += 4
index++
}
}
return dst
}
func DrawTextOnImage(text string, font *truetype.Font, img *image.NRGBA, size, x, y int) {
c := freetype.NewContext()
c.SetDPI(120)
c.SetFont(font)
c.SetFontSize(float64(size))
c.SetClip(img.Bounds())
c.SetDst(img)
c.SetSrc(image.Black)
pt := freetype.Pt(x, y+int(c.PointToFix32(float64(size))>>8))
c.DrawString(text, pt)
}
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 blurHorizontal(src *image.NRGBA, kernel []float64) *image.NRGBA {
radius := len(kernel) - 1
width := src.Bounds().Max.X
height := src.Bounds().Max.Y
dst := image.NewNRGBA(image.Rect(0, 0, width, height))
parallel(width, func(partStart, partEnd int) {
for x := partStart; x < partEnd; x++ {
start := x - radius
if start < 0 {
start = 0
}
end := x + radius
if end > width-1 {
end = width - 1
}
weightSum := 0.0
for ix := start; ix <= end; ix++ {
weightSum += kernel[absint(x-ix)]
}
for y := 0; y < height; y++ {
r, g, b, a := 0.0, 0.0, 0.0, 0.0
for ix := start; ix <= end; ix++ {
weight := kernel[absint(x-ix)]
i := y*src.Stride + ix*4
r += float64(src.Pix[i+0]) * weight
g += float64(src.Pix[i+1]) * weight
b += float64(src.Pix[i+2]) * weight
a += float64(src.Pix[i+3]) * weight
}
r = math.Min(math.Max(r/weightSum, 0.0), 255.0)
g = math.Min(math.Max(g/weightSum, 0.0), 255.0)
b = math.Min(math.Max(b/weightSum, 0.0), 255.0)
a = math.Min(math.Max(a/weightSum, 0.0), 255.0)
j := y*dst.Stride + x*4
dst.Pix[j+0] = uint8(r + 0.5)
dst.Pix[j+1] = uint8(g + 0.5)
dst.Pix[j+2] = uint8(b + 0.5)
dst.Pix[j+3] = uint8(a + 0.5)
}
}
})
return dst
}
// MakeImage makes an image from an image.NRGBA.
func MakeImage(i *image.NRGBA) (img Image) {
img.Width, img.Height = i.Bounds().Dx(), i.Bounds().Dy()
img.tex = gl.GenTexture()
img.tex.Bind(gl.TEXTURE_2D)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR)
gl.TexImage2D(gl.TEXTURE_2D, 0, 4, img.Width, img.Height,
0, gl.RGBA, gl.UNSIGNED_BYTE, i.Pix)
return
}
func texFromImage(rend *C.SDL_Renderer, img *image.NRGBA) *C.SDL_Texture {
b := img.Bounds()
w, h := b.Dx(), b.Dy()
fmt := C.SDL_PIXELFORMAT_ABGR8888
acc := C.SDL_TEXTUREACCESS_STATIC
tex := C.SDL_CreateTexture(rend, C.Uint32(fmt), C.int(acc), C.int(w), C.int(h))
if tex == nil {
panic(sdlError())
}
if C.SDL_UpdateTexture(tex, nil, unsafe.Pointer(&img.Pix[0]), C.int(img.Stride)) < 0 {
panic(sdlError())
}
if C.SDL_SetTextureBlendMode(tex, C.SDL_BLENDMODE_BLEND) < 0 {
panic(sdlError())
}
return tex
}
func calculateImg(img *image.NRGBA, pointX, pointY, zoom float64, julia bool, maxIter int) {
minCx := -2.
minCy := -2.
if !julia {
minCx = pointX
minCy = pointY
}
bounds := img.Bounds()
stepX := math.Abs(minCx-2.) / float64(bounds.Dx()) / zoom
stepY := math.Abs(minCy-2.) / float64(bounds.Dy()) / zoom
pal := paletteToNRGBA(palette.Rainbow(maxIter, 0, 1, 1, 1, 1))
for y := bounds.Min.Y; y < bounds.Max.Y; y++ {
cy := minCy + float64(y)*stepY
for x := bounds.Min.X; x < bounds.Max.X; x++ {
img.SetNRGBA(x, y, pal[pointIteration(minCx+float64(x)*stepX, cy, pointX, pointY, julia, maxIter)])
}
}
}
func (s *Scene) Render(img *image.NRGBA) {
rect := img.Bounds()
w, h := float64(rect.Dx()), float64(rect.Dy())
i_max, j_max := rect.Dx(), rect.Dy()
for i := 0; i < i_max; i++ {
u := (float64(i) - w/2.0) / (w / 2.0)
for j := 0; j < j_max; j++ {
// (h / w) term is needed to correct for nonunity aspect ratios
v := (float64(j) - h/2.0) / (h / 2.0) * (h / w)
if *debug {
//fmt.Printf("%d/%d\n", i * j_max + j, i_max * j_max)
}
s.SetColor(i, j, u, v, img)
}
}
}
func skewVertical(src *image.NRGBA, degrees float64) *image.NRGBA {
bounds := src.Bounds()
maxY := bounds.Max.Y
maxX := bounds.Max.X * 4
distance := float64(bounds.Max.X) * math.Tan(degrees)
shouldFlip := false
if distance < 0 {
distance = -distance
shouldFlip = true
}
newHeight := maxY + int(1+distance)
dst := image.NewNRGBA(image.Rect(0, 0, bounds.Max.X, newHeight))
step := distance
for x := 0; x < maxX; x += 4 {
for row := 0; row < maxY; row += 1 {
srcPx := row*src.Stride + x
dstLower := (int(step)+row)*dst.Stride + x
dstUpper := dstLower + dst.Stride
_, delta := math.Modf(step)
if src.Pix[srcPx+3] != 0 {
dst.Pix[dstLower+0] += uint8(float64(src.Pix[srcPx+0]) * (1 - delta))
dst.Pix[dstLower+1] += uint8(float64(src.Pix[srcPx+1]) * (1 - delta))
dst.Pix[dstLower+2] += uint8(float64(src.Pix[srcPx+2]) * (1 - delta))
dst.Pix[dstLower+3] += uint8(float64(src.Pix[srcPx+3]) * (1 - delta))
dst.Pix[dstUpper+0] += uint8(float64(src.Pix[srcPx+0]) * delta)
dst.Pix[dstUpper+1] += uint8(float64(src.Pix[srcPx+1]) * delta)
dst.Pix[dstUpper+2] += uint8(float64(src.Pix[srcPx+2]) * delta)
dst.Pix[dstUpper+3] += uint8(float64(src.Pix[srcPx+3]) * delta)
}
}
step -= distance / float64(bounds.Max.X)
}
if shouldFlip {
return imaging.FlipH(dst)
} else {
return dst
}
}
func mergeTextures(normalTexture, litTexture *image.NRGBA) {
normSize := normalTexture.Bounds().Size()
litSize := litTexture.Bounds().Size()
if normSize.X != litSize.X || normSize.Y != litSize.Y {
//Größen sind unterschiedlich --> normale Textur auf Größe der Nachttextur skalieren
normalTexture = imaging.Resize(normalTexture, litSize.X, litSize.Y, imaging.Linear)
}
for x := 0; x < litSize.X; x++ {
for y := 0; y < litSize.Y; y++ {
i := y*normalTexture.Stride + x*4
j := y*litTexture.Stride + x*4
litTexture.Pix[j+0] = mergePixel(normalTexture.Pix[i+0], litTexture.Pix[j+0], 1.0)
litTexture.Pix[j+1] = mergePixel(normalTexture.Pix[i+1], litTexture.Pix[j+1], 1.0)
litTexture.Pix[j+2] = mergePixel(normalTexture.Pix[i+2], litTexture.Pix[j+2], 0.7)
litTexture.Pix[j+3] = normalTexture.Pix[i+3]
}
}
}
// Draws the "src" onto the "dst" image at the given x/y bounds, maintaining
// the original size. Pixels with have an alpha of 0x00 are not draw, and
// all others are drawn with an alpha of 0xFF
func fastDraw(dst *image.NRGBA, src *image.NRGBA, x, y int) {
bounds := src.Bounds()
maxY := bounds.Max.Y
maxX := bounds.Max.X * 4
pointer := dst.PixOffset(x, y)
for row := 0; row < maxY; row += 1 {
for i := 0; i < maxX; i += 4 {
srcPx := row*src.Stride + i
dstPx := row*dst.Stride + i + pointer
if src.Pix[srcPx+3] != 0 {
dst.Pix[dstPx+0] = src.Pix[srcPx+0]
dst.Pix[dstPx+1] = src.Pix[srcPx+1]
dst.Pix[dstPx+2] = src.Pix[srcPx+2]
dst.Pix[dstPx+3] = 0xFF
}
}
}
}
// Encode encoded the image in SKTEXT format.
func Encode(w io.Writer, m *image.NRGBA) error {
fmt.Fprintf(w, "%s%d %d\n", skTextHeader, m.Rect.Dx(), m.Rect.Dy())
height := m.Bounds().Dy()
for i := 0; i < len(m.Pix); i += 4 {
_, err := fmt.Fprintf(w, "0x%02x%02x%02x%02x", m.Pix[i+0], m.Pix[i+1], m.Pix[i+2], m.Pix[i+3])
if err != nil {
return err
}
// Add whitespace.
if (i > 0 || m.Stride == 4) && (i+4)%m.Stride == 0 {
// Don't add a trailing \n to the very last line.
if (i+4)/m.Stride < height {
fmt.Fprintln(w)
}
} else {
fmt.Fprint(w, " ")
}
}
return nil
}
func resize32(src *image.NRGBA, dstW, dstH int) image.Image {
srcRect := src.Bounds()
srcW := srcRect.Dx()
srcH := srcRect.Dy()
dstW64, dstH64 := uint64(dstW), uint64(dstH)
srcW64, srcH64 := uint64(srcW), uint64(srcH)
dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
var x, y uint64
dstI := 0
for y = 0; y < dstH64; y++ {
srcY := int(y * srcH64 / dstH64)
for x = 0; x < dstW64; x++ {
srcX := int(x * srcW64 / dstW64)
srcI := 4 * (srcY*srcW + srcX)
copy(dst.Pix[dstI:dstI+4], src.Pix[srcI:srcI+4])
dstI += 4
}
}
return dst
}
func resizeVertical(src *image.NRGBA, height int, filter ResampleFilter) *image.NRGBA {
srcBounds := src.Bounds()
srcW := srcBounds.Max.X
srcH := srcBounds.Max.Y
dstW := srcW
dstH := height
dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
weights := precomputeWeights(dstH, srcH, filter)
parallel(dstW, func(partStart, partEnd int) {
for dstX := partStart; dstX < partEnd; dstX++ {
for dstY := 0; dstY < dstH; dstY++ {
var c [4]int64
for _, iw := range weights[dstY].iwpairs {
i := iw.i*src.Stride + dstX*4
a := int64(src.Pix[i+3]) * int64(iw.w)
c[0] += int64(src.Pix[i+0]) * a
c[1] += int64(src.Pix[i+1]) * a
c[2] += int64(src.Pix[i+2]) * a
c[3] += a
}
j := dstY*dst.Stride + dstX*4
sum := weights[dstY].wsum
dst.Pix[j+0] = clampint32(int32(float64(c[0])/float64(c[3]) + 0.5))
dst.Pix[j+1] = clampint32(int32(float64(c[1])/float64(c[3]) + 0.5))
dst.Pix[j+2] = clampint32(int32(float64(c[2])/float64(c[3]) + 0.5))
dst.Pix[j+3] = clampint32(int32(float64(c[3])/float64(sum) + 0.5))
}
}
})
return dst
}
func nearestNRGBA(in *image.NRGBA, out *image.NRGBA, scale float64, coeffs []bool, offset []int, filterLength int) {
newBounds := out.Bounds()
maxX := in.Bounds().Dx() - 1
for x := newBounds.Min.X; x < newBounds.Max.X; x++ {
row := in.Pix[x*in.Stride:]
for y := newBounds.Min.Y; y < newBounds.Max.Y; y++ {
var rgba [4]float32
var sum float32
start := offset[y]
ci := y * filterLength
for i := 0; i < filterLength; i++ {
if coeffs[ci+i] {
xi := start + i
switch {
case uint(xi) < uint(maxX):
xi *= 4
case xi >= maxX:
xi = 4 * maxX
default:
xi = 0
}
rgba[0] += float32(row[xi+0])
rgba[1] += float32(row[xi+1])
rgba[2] += float32(row[xi+2])
rgba[3] += float32(row[xi+3])
sum++
}
}
xo := (y-newBounds.Min.Y)*out.Stride + (x-newBounds.Min.X)*4
out.Pix[xo+0] = floatToUint8(rgba[0] / sum)
out.Pix[xo+1] = floatToUint8(rgba[1] / sum)
out.Pix[xo+2] = floatToUint8(rgba[2] / sum)
out.Pix[xo+3] = floatToUint8(rgba[3] / sum)
}
}
}
func (l *windowsAssetloader) loadResources() {
resourceData, err := payload.Read()
check(err)
l.resources, err = blob.Read(bytes.NewBuffer(resourceData))
// load the texture atlas
atlas, found := l.resources.GetByID("atlas")
if !found {
panic("texture atlas not found in resources")
}
ping, err := png.Decode(bytes.NewReader(atlas))
check(err)
var nrgba *image.NRGBA
if asNRGBA, ok := ping.(*image.NRGBA); ok {
nrgba = asNRGBA
} else {
nrgba = image.NewNRGBA(ping.Bounds())
draw.Draw(nrgba, nrgba.Bounds(), ping, image.ZP, draw.Src)
}
texture, err := l.device.CreateTexture(
uint(nrgba.Bounds().Dx()),
uint(nrgba.Bounds().Dy()),
1,
d3d9.USAGE_SOFTWAREPROCESSING,
d3d9.FMT_A8R8G8B8,
d3d9.POOL_MANAGED,
nil,
)
check(err)
lockedRect, err := texture.LockRect(0, nil, d3d9.LOCK_DISCARD)
check(err)
lockedRect.SetAllBytes(nrgba.Pix, nrgba.Stride)
check(texture.UnlockRect(0))
l.textureAtlas = texture
l.textureAtlasBounds = nrgba.Bounds()
}
func resizeHorizontal(src *image.NRGBA, width int, filter ResampleFilter) *image.NRGBA {
srcBounds := src.Bounds()
srcW := srcBounds.Max.X
srcH := srcBounds.Max.Y
dstW := width
dstH := srcH
dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
dX := float64(srcW) / float64(dstW)
scaleX := math.Max(dX, 1.0)
rX := math.Ceil(scaleX * filter.Support)
Parallel(dstW, func(partStart, partEnd int) {
weights := make([]float64, int(rX+2)*2)
for dstX := partStart; dstX < partEnd; dstX++ {
fX := (float64(dstX)+0.5)*dX - 0.5
startX := int(math.Ceil(fX - rX))
if startX < 0 {
startX = 0
}
endX := int(math.Floor(fX + rX))
if endX > srcW-1 {
endX = srcW - 1
}
// cache weights
weightSum := 0.0
for x := startX; x <= endX; x++ {
w := filter.Kernel((float64(x) - fX) / scaleX)
weightSum += w
weights[x-startX] = w
}
for dstY := 0; dstY < dstH; dstY++ {
r, g, b, a := 0.0, 0.0, 0.0, 0.0
for x := startX; x <= endX; x++ {
weight := weights[x-startX]
i := dstY*src.Stride + x*4
r += float64(src.Pix[i+0]) * weight
g += float64(src.Pix[i+1]) * weight
b += float64(src.Pix[i+2]) * weight
a += float64(src.Pix[i+3]) * weight
}
r = math.Min(math.Max(r/weightSum, 0.0), 255.0)
g = math.Min(math.Max(g/weightSum, 0.0), 255.0)
b = math.Min(math.Max(b/weightSum, 0.0), 255.0)
a = math.Min(math.Max(a/weightSum, 0.0), 255.0)
j := dstY*dst.Stride + dstX*4
dst.Pix[j+0] = uint8(r + 0.5)
dst.Pix[j+1] = uint8(g + 0.5)
dst.Pix[j+2] = uint8(b + 0.5)
dst.Pix[j+3] = uint8(a + 0.5)
}
}
})
return dst
}
func resizeVertical(src *image.NRGBA, height int, filter ResampleFilter) *image.NRGBA {
srcBounds := src.Bounds()
srcW := srcBounds.Max.X
srcH := srcBounds.Max.Y
dstW := srcW
dstH := height
dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
dY := float64(srcH) / float64(dstH)
scaleY := math.Max(dY, 1.0)
rY := math.Ceil(scaleY * filter.Support)
Parallel(dstH, func(partStart, partEnd int) {
weights := make([]float64, int(rY+2)*2)
for dstY := partStart; dstY < partEnd; dstY++ {
fY := (float64(dstY)+0.5)*dY - 0.5
startY := int(math.Ceil(fY - rY))
if startY < 0 {
startY = 0
}
endY := int(math.Floor(fY + rY))
if endY > srcH-1 {
endY = srcH - 1
}
// cache weights
weightSum := 0.0
for y := startY; y <= endY; y++ {
w := filter.Kernel((float64(y) - fY) / scaleY)
weightSum += w
weights[y-startY] = w
}
for dstX := 0; dstX < dstW; dstX++ {
r, g, b, a := 0.0, 0.0, 0.0, 0.0
for y := startY; y <= endY; y++ {
weight := weights[y-startY]
i := y*src.Stride + dstX*4
r += float64(src.Pix[i+0]) * weight
g += float64(src.Pix[i+1]) * weight
b += float64(src.Pix[i+2]) * weight
a += float64(src.Pix[i+3]) * weight
}
r = math.Min(math.Max(r/weightSum, 0.0), 255.0)
g = math.Min(math.Max(g/weightSum, 0.0), 255.0)
b = math.Min(math.Max(b/weightSum, 0.0), 255.0)
a = math.Min(math.Max(a/weightSum, 0.0), 255.0)
j := dstY*dst.Stride + dstX*4
dst.Pix[j+0] = uint8(r + 0.5)
dst.Pix[j+1] = uint8(g + 0.5)
dst.Pix[j+2] = uint8(b + 0.5)
dst.Pix[j+3] = uint8(a + 0.5)
}
}
})
return dst
}
func makeImg(s string, b string, h int, qx int, qy int, u int) (*image.NRGBA, error) {
var (
width int
height int
canvas *image.NRGBA
k int
v rune
)
if u <= 0 {
u = 1
}
if qx <= 0 {
qx = 5
}
if qy <= 0 {
qy = 3
}
if h <= 0 {
h = 100
}
width = qx*2 + len(b)*u
height = qy*2 + h
fontSize := 16
canvas = image.NewNRGBA(image.Rect(0, 0, width, height+fontSize+5))
drawRect(canvas, image.Rect(0, 0, width, height+fontSize+5), color.RGBA{255, 255, 255, 255})
for k, v = range b {
if v == 49 {
drawRect(canvas, image.Rect(qx+k*u, qy, qx+k*u+u, qy+h), color.RGBA{0, 0, 0, 255})
}
}
data, err := ioutil.ReadFile("./fonts/luxisr.ttf")
if err != nil {
return nil, err
}
font, err := freetype.ParseFont(data)
if err != nil {
return nil, err
}
c := freetype.NewContext()
c.SetDst(canvas)
c.SetClip(canvas.Bounds())
c.SetSrc(image.Black)
c.SetFont(font)
c.SetFontSize(float64(fontSize))
s = expandStr(s)
p, _ := c.DrawString(s, freetype.Pt(0, height+fontSize+5))
drawRect(canvas, image.Rect(0, height, width, height+fontSize+5), color.RGBA{255, 255, 255, 255})
p, _ = c.DrawString(s, freetype.Pt(width/2-int(p.X)/256/2, height+fontSize))
return canvas, nil
}
func resizeVertical(src *image.NRGBA, height int, filter resamplingFilter) *image.NRGBA {
srcBounds := src.Bounds()
srcW := srcBounds.Dx()
srcH := srcBounds.Dy()
srcMinX := srcBounds.Min.X
srcMinY := srcBounds.Min.Y
srcMaxY := srcBounds.Max.Y
dstW := srcW
dstH := height
dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
dY := float64(srcH) / float64(dstH)
scaleY := math.Max(dY, 1.0)
rY := math.Ceil(scaleY * filter.Support)
// divide image to parts for parallel processing
numGoroutines := runtime.NumCPU()
goMaxProcs := runtime.GOMAXPROCS(0)
if numGoroutines > goMaxProcs {
numGoroutines = goMaxProcs
}
if numGoroutines > dstH {
numGoroutines = dstH
}
partSize := dstH / numGoroutines
doneChan := make(chan bool, numGoroutines)
for part := 0; part < numGoroutines; part++ {
partStart := part * partSize
partEnd := (part + 1) * partSize
if part == numGoroutines-1 {
partEnd = dstH
}
go func(partStart, partEnd int) {
for dstY := partStart; dstY < partEnd; dstY++ {
fY := float64(srcMinY) + (float64(dstY)+0.5)*dY - 0.5
startY := int(math.Ceil(fY - rY))
if startY < srcMinY {
startY = srcMinY
}
endY := int(math.Floor(fY + rY))
if endY > srcMaxY-1 {
endY = srcMaxY - 1
}
// cache weights
weightSum := 0.0
weights := make([]float64, int(rY+2)*2)
for y := startY; y <= endY; y++ {
w := filter.Kernel((float64(y) - fY) / scaleY)
weightSum += w
weights[y-startY] = w
}
for dstX := 0; dstX < dstW; dstX++ {
srcX := srcMinX + dstX
r, g, b, a := 0.0, 0.0, 0.0, 0.0
for y := startY; y <= endY; y++ {
weight := weights[y-startY]
i := src.PixOffset(srcX, y)
r += float64(src.Pix[i+0]) * weight
g += float64(src.Pix[i+1]) * weight
b += float64(src.Pix[i+2]) * weight
a += float64(src.Pix[i+3]) * weight
}
r = math.Min(math.Max(r/weightSum, 0.0), 255.0)
g = math.Min(math.Max(g/weightSum, 0.0), 255.0)
b = math.Min(math.Max(b/weightSum, 0.0), 255.0)
a = math.Min(math.Max(a/weightSum, 0.0), 255.0)
j := dst.PixOffset(dstX, dstY)
dst.Pix[j+0] = uint8(r + 0.5)
dst.Pix[j+1] = uint8(g + 0.5)
dst.Pix[j+2] = uint8(b + 0.5)
dst.Pix[j+3] = uint8(a + 0.5)
}
}
doneChan <- true
}(partStart, partEnd)
}
// wait for goroutines to finish
for part := 0; part < numGoroutines; part++ {
<-doneChan
}
return dst
}
// fast nearest-neighbor resize, no filtering
func resizeNearest(src *image.NRGBA, width, height int) *image.NRGBA {
dstW, dstH := width, height
srcBounds := src.Bounds()
srcW := srcBounds.Dx()
srcH := srcBounds.Dy()
srcMinX := srcBounds.Min.X
srcMinY := srcBounds.Min.Y
srcMaxX := srcBounds.Max.X
srcMaxY := srcBounds.Max.Y
dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
dx := float64(srcW) / float64(dstW)
dy := float64(srcH) / float64(dstH)
// divide image to parts for parallel processing
numGoroutines := runtime.NumCPU()
goMaxProcs := runtime.GOMAXPROCS(0)
if numGoroutines > goMaxProcs {
numGoroutines = goMaxProcs
}
if numGoroutines > dstH {
numGoroutines = dstH
}
partSize := dstH / numGoroutines
doneChan := make(chan bool, numGoroutines)
for part := 0; part < numGoroutines; part++ {
partStart := part * partSize
partEnd := (part + 1) * partSize
if part == numGoroutines-1 {
partEnd = dstH
}
go func(partStart, partEnd int) {
for dstY := partStart; dstY < partEnd; dstY++ {
fy := float64(srcMinY) + (float64(dstY)+0.5)*dy - 0.5
for dstX := 0; dstX < dstW; dstX++ {
fx := float64(srcMinX) + (float64(dstX)+0.5)*dx - 0.5
srcX := int(math.Min(math.Max(math.Floor(fx+0.5), float64(srcMinX)), float64(srcMaxX)))
srcY := int(math.Min(math.Max(math.Floor(fy+0.5), float64(srcMinY)), float64(srcMaxY)))
srcOffset := src.PixOffset(srcX, srcY)
dstOffset := dst.PixOffset(dstX, dstY)
dst.Pix[dstOffset+0] = src.Pix[srcOffset+0]
dst.Pix[dstOffset+1] = src.Pix[srcOffset+1]
dst.Pix[dstOffset+2] = src.Pix[srcOffset+2]
dst.Pix[dstOffset+3] = src.Pix[srcOffset+3]
}
}
doneChan <- true
}(partStart, partEnd)
}
// wait for goroutines to finish
for part := 0; part < numGoroutines; part++ {
<-doneChan
}
return dst
}
