fill with winding rule
This commit is contained in:
Laurent Le Goff
parent
25f7be3323
commit
eaa2454bb3
5 changed files with 606 additions and 449 deletions
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@ -8,11 +8,11 @@ import (
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)
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const (
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SUBPIXEL_SHIFT = 3
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SUBPIXEL_SHIFT = 4
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SUBPIXEL_COUNT = 1 << SUBPIXEL_SHIFT
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)
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var SUBPIXEL_OFFSETS = SUBPIXEL_OFFSETS_SAMPLE_8
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var SUBPIXEL_OFFSETS = SUBPIXEL_OFFSETS_SAMPLE_16
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type SUBPIXEL_DATA uint16
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type NON_ZERO_MASK_DATA_UNIT uint8
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@ -105,13 +105,13 @@ func (r *Rasterizer8BitsSample) RenderEvenOdd(img *image.RGBA, color *image.RGBA
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clipRect = intersect(clipRect, r.ClipBound)
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p := 0
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l := len(*polygon) / 2
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var edges [32]PolygonEdge
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for p < l {
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var edges [20]PolygonEdge
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edgeCount := polygon.getEdges(p, 10, edges[:], transform, clipRect)
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edgeCount := polygon.getEdges(p, 16, edges[:], transform, clipRect)
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for k := 0; k < edgeCount; k++ {
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r.addEvenOddEdge(&(edges[k]))
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}
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p += 10
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p += 16
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}
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r.fillEvenOdd(img, color, clipRect)
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@ -121,11 +121,13 @@ func (r *Rasterizer8BitsSample) RenderEvenOdd(img *image.RGBA, color *image.RGBA
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func (r *Rasterizer8BitsSample) addEvenOddEdge(edge *PolygonEdge) {
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x := edge.X
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slope := edge.Slope
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var ySub, mask SUBPIXEL_DATA
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var xp, yLine int
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for y := edge.FirstLine; y <= edge.LastLine; y++ {
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ySub := SUBPIXEL_DATA(y & (SUBPIXEL_COUNT - 1))
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xp := (int)(x + SUBPIXEL_OFFSETS[ySub])
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mask := SUBPIXEL_DATA(1 << ySub)
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yLine := y >> SUBPIXEL_SHIFT
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ySub = SUBPIXEL_DATA(y & (SUBPIXEL_COUNT - 1))
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xp = (int)(x + SUBPIXEL_OFFSETS[ySub])
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mask = SUBPIXEL_DATA(1 << ySub)
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yLine = y >> SUBPIXEL_SHIFT
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r.MaskBuffer[yLine*r.BufferWidth+xp] ^= mask
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x += slope
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}
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@ -157,9 +159,131 @@ func (r *Rasterizer8BitsSample) fillEvenOdd(img *image.RGBA, color *image.RGBACo
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p := (*uint32)(unsafe.Pointer(&tp[x]))
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mask ^= r.MaskBuffer[y*uint32(r.BufferWidth)+x]
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// 8bits
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alpha := uint32(coverageTable[mask])
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//alpha := uint32(coverageTable[mask])
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// 16bits
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//alpha := uint32(coverageTable[mask & 0xff] + coverageTable[(mask >> 8) & 0xff])
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alpha := uint32(coverageTable[mask & 0xff] + coverageTable[(mask >> 8) & 0xff])
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// 32bits
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//alpha := uint32(coverageTable[mask & 0xff] + coverageTable[(mask >> 8) & 0xff] + coverageTable[(mask >> 16) & 0xff] + coverageTable[(mask >> 24) & 0xff])
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// alpha is in range of 0 to SUBPIXEL_COUNT
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invAlpha := uint32(SUBPIXEL_COUNT) - alpha
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ct1 := (*p & 0xff00ff) * invAlpha
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ct2 := ((*p >> 8) & 0xff00ff) * invAlpha
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ct1 = ((ct1 + cs1*alpha) >> SUBPIXEL_SHIFT) & 0xff00ff
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ct2 = ((ct2 + cs2*alpha) << (8 - SUBPIXEL_SHIFT)) & 0xff00ff00
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*p = ct1 + ct2
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}
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}
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}
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/*
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* Renders the polygon with non-zero winding fill.
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* param aTarget the target bitmap.
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* param aPolygon the polygon to render.
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* param aColor the color to be used for rendering.
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* param aTransformation the transformation matrix.
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*/
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func (r *Rasterizer8BitsSample) RenderNonZeroWinding(img *image.RGBA, color *image.RGBAColor, polygon *Polygon, tr [6]float64) {
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r.MaskBuffer = make([]SUBPIXEL_DATA, r.BufferWidth*r.Height)
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r.WindingBuffer = make([]NON_ZERO_MASK_DATA_UNIT, r.BufferWidth*r.Height*SUBPIXEL_COUNT)
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// inline matrix multiplication
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transform := [6]float64{
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tr[0]*r.RemappingMatrix[0] + tr[1]*r.RemappingMatrix[2],
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tr[1]*r.RemappingMatrix[3] + tr[0]*r.RemappingMatrix[1],
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tr[2]*r.RemappingMatrix[0] + tr[3]*r.RemappingMatrix[2],
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tr[3]*r.RemappingMatrix[3] + tr[2]*r.RemappingMatrix[1],
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tr[4]*r.RemappingMatrix[0] + tr[5]*r.RemappingMatrix[2] + r.RemappingMatrix[4],
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tr[5]*r.RemappingMatrix[3] + tr[4]*r.RemappingMatrix[1] + r.RemappingMatrix[5],
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}
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clipRect := clip(img.Bounds().Min.X, img.Bounds().Min.Y, img.Bounds().Dx(), img.Bounds().Dy(), SUBPIXEL_COUNT)
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clipRect = intersect(clipRect, r.ClipBound)
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p := 0
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l := len(*polygon) / 2
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var edges [32]PolygonEdge
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for p < l {
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edgeCount := polygon.getEdges(p, 16, edges[:], transform, clipRect)
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for k := 0; k < edgeCount; k++ {
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r.addNonZeroEdge(&(edges[k]))
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}
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p += 16
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}
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r.fillNonZero(img, color, clipRect)
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}
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//! Adds an edge to be used with non-zero winding fill.
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func (r *Rasterizer8BitsSample) addNonZeroEdge(edge *PolygonEdge) {
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x := edge.X
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slope := edge.Slope
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var ySub, mask SUBPIXEL_DATA
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var xp, yLine int
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winding := NON_ZERO_MASK_DATA_UNIT(edge.Winding)
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for y := edge.FirstLine; y <= edge.LastLine; y++ {
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ySub = SUBPIXEL_DATA(y & (SUBPIXEL_COUNT - 1))
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xp = (int)(x + SUBPIXEL_OFFSETS[ySub])
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mask = SUBPIXEL_DATA(1 << ySub)
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yLine = y >> SUBPIXEL_SHIFT
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r.MaskBuffer[yLine*r.BufferWidth+xp] |= mask
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r.WindingBuffer[(yLine*r.BufferWidth+xp)*SUBPIXEL_COUNT+int(ySub)] += winding
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x += slope
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}
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}
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//! Renders the mask to the canvas with non-zero winding fill.
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func (r *Rasterizer8BitsSample) fillNonZero(img *image.RGBA, color *image.RGBAColor, clipBound [4]float64) {
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var x, y uint32
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minX := uint32(clipBound[0])
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maxX := uint32(clipBound[2])
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minY := uint32(clipBound[1]) >> SUBPIXEL_SHIFT
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maxY := uint32(clipBound[3]) >> SUBPIXEL_SHIFT
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//pixColor := (uint32(color.R) << 24) | (uint32(color.G) << 16) | (uint32(color.B) << 8) | uint32(color.A)
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pixColor := (*uint32)(unsafe.Pointer(color))
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cs1 := *pixColor & 0xff00ff
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cs2 := (*pixColor >> 8) & 0xff00ff
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stride := uint32(img.Stride)
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var mask SUBPIXEL_DATA
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var n uint32
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var values [SUBPIXEL_COUNT]NON_ZERO_MASK_DATA_UNIT
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for n = 0; n < SUBPIXEL_COUNT; n++ {
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values[n] = 0
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}
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for y = minY; y < maxY; y++ {
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tp := img.Pix[y*stride:]
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mask = 0
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for x = minX; x <= maxX; x++ {
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p := (*uint32)(unsafe.Pointer(&tp[x]))
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temp := r.MaskBuffer[y*uint32(r.BufferWidth)+x]
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if temp != 0 {
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var bit SUBPIXEL_DATA = 1
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for n = 0; n < SUBPIXEL_COUNT; n++ {
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if (temp & bit) != 0 {
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t := values[n]
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values[n] += r.WindingBuffer[(y*uint32(r.BufferWidth)+x)*SUBPIXEL_COUNT+n]
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if (t == 0 || values[n] == 0 )&& t != values[n] {
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mask ^= bit
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}
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}
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bit <<= 1
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}
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}
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// 8bits
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//alpha := uint32(coverageTable[mask])
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// 16bits
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alpha := uint32(coverageTable[mask & 0xff] + coverageTable[(mask >> 8) & 0xff])
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// 32bits
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//alpha := uint32(coverageTable[mask & 0xff] + coverageTable[(mask >> 8) & 0xff] + coverageTable[(mask >> 16) & 0xff] + coverageTable[(mask >> 24) & 0xff])
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@ -49,23 +49,6 @@ func (p *Path) LineTo(x, y float64) {
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p.points[len(p.points)-1] = y
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}
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func TestRasterizer8BitsSample(t *testing.T) {
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img := image.NewRGBA(200, 200)
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var p Path
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p.LineTo(10, 190)
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c := curve.CubicCurveFloat64{10, 190, 10, 10, 190, 10, 190, 190}
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c.Segment(&p, flattening_threshold)
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poly := Polygon(p.points)
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color := image.RGBAColor{0, 0, 0, 0xff}
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tr := [6]float64{1, 0, 0, 1, 0, 0}
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r := NewRasterizer8BitsSample(200, 200)
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//PolylineBresenham(img, image.Black, poly...)
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r.RenderEvenOdd(img, &color, &poly, tr)
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savepng("_testRasterizer8BitsSample.png", img)
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}
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func TestFreetype(t *testing.T) {
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var p Path
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c := curve.CubicCurveFloat64{10, 190, 10, 10, 190, 10, 190, 190}
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@ -87,7 +70,8 @@ func TestFreetype(t *testing.T) {
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savepng("_testFreetype.png", img)
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}
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func BenchmarkRasterizer8BitsSample(b *testing.B) {
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func TestRasterizer(t *testing.T) {
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img := image.NewRGBA(200, 200)
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var p Path
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p.LineTo(10, 190)
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c := curve.CubicCurveFloat64{10, 190, 10, 10, 190, 10, 190, 190}
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@ -95,11 +79,29 @@ func BenchmarkRasterizer8BitsSample(b *testing.B) {
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poly := Polygon(p.points)
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color := image.RGBAColor{0, 0, 0, 0xff}
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tr := [6]float64{1, 0, 0, 1, 0, 0}
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for i := 0; i < b.N; i++ {
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r := NewRasterizer8BitsSample(200, 200)
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//PolylineBresenham(img, image.Black, poly...)
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r.RenderEvenOdd(img, &color, &poly, tr)
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savepng("_testRasterizer.png", img)
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}
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func TestRasterizerNonZeroWinding(t *testing.T) {
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img := image.NewRGBA(200, 200)
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rasterizer := NewRasterizer8BitsSample(200, 200)
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rasterizer.RenderEvenOdd(img, &color, &poly, tr)
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}
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var p Path
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p.LineTo(10, 190)
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c := curve.CubicCurveFloat64{10, 190, 10, 10, 190, 10, 190, 190}
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c.Segment(&p, flattening_threshold)
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poly := Polygon(p.points)
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color := image.RGBAColor{0, 0, 0, 0xff}
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tr := [6]float64{1, 0, 0, 1, 0, 0}
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r := NewRasterizer8BitsSample(200, 200)
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//PolylineBresenham(img, image.Black, poly...)
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r.RenderNonZeroWinding(img, &color, &poly, tr)
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savepng("_testRasterizerNonZeroWinding.png", img)
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}
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func BenchmarkFreetype(b *testing.B) {
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@ -122,3 +124,34 @@ func BenchmarkFreetype(b *testing.B) {
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rasterizer.Rasterize(painter)
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}
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}
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func BenchmarkRasterizerNonZeroWinding(b *testing.B) {
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var p Path
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p.LineTo(10, 190)
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c := curve.CubicCurveFloat64{10, 190, 10, 10, 190, 10, 190, 190}
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c.Segment(&p, flattening_threshold)
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poly := Polygon(p.points)
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color := image.RGBAColor{0, 0, 0, 0xff}
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tr := [6]float64{1, 0, 0, 1, 0, 0}
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for i := 0; i < b.N; i++ {
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img := image.NewRGBA(200, 200)
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rasterizer := NewRasterizer8BitsSample(200, 200)
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rasterizer.RenderNonZeroWinding(img, &color, &poly, tr)
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}
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}
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func BenchmarkRasterizer(b *testing.B) {
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var p Path
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p.LineTo(10, 190)
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c := curve.CubicCurveFloat64{10, 190, 10, 10, 190, 10, 190, 190}
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c.Segment(&p, flattening_threshold)
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poly := Polygon(p.points)
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color := image.RGBAColor{0, 0, 0, 0xff}
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tr := [6]float64{1, 0, 0, 1, 0, 0}
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for i := 0; i < b.N; i++ {
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img := image.NewRGBA(200, 200)
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rasterizer := NewRasterizer8BitsSample(200, 200)
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rasterizer.RenderEvenOdd(img, &color, &poly, tr)
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}
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}
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