| // Copyright 2016 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 iconvg |
| |
| import ( |
| "bytes" |
| "flag" |
| "image/color" |
| "math" |
| "os" |
| "path/filepath" |
| "runtime" |
| "strconv" |
| "testing" |
| |
| "golang.org/x/image/math/f32" |
| ) |
| |
| // updateFlag controls whether to overwrite testdata files during tests. |
| // This can be useful when adding new testdataTestCases. |
| var updateFlag = flag.Bool("update", false, "Overwrite testdata files.") |
| |
| func testEncode(t *testing.T, e *Encoder, wantFilename string) { |
| got, err := e.Bytes() |
| if err != nil { |
| t.Fatalf("encoding: %v", err) |
| } |
| if *updateFlag { |
| if err := os.WriteFile(filepath.FromSlash(wantFilename), got, 0666); err != nil { |
| t.Fatalf("WriteFile: %v", err) |
| } |
| return |
| } |
| want, err := os.ReadFile(filepath.FromSlash(wantFilename)) |
| if err != nil { |
| t.Fatalf("ReadFile: %v", err) |
| } |
| if !bytes.Equal(got, want) { |
| // The IconVG encoder is expected to be completely deterministic across all |
| // platforms and Go compilers, so check that we get exactly the right bytes. |
| // |
| // If we get slightly different bytes on some supported platform (for example, |
| // a new GOOS/GOARCH port, or a different but spec-compliant Go compiler) due |
| // to non-determinism in floating-point math, the encoder needs to be fixed. |
| // |
| // See golang.org/issue/43219#issuecomment-748531069. |
| t.Errorf("\ngot %d bytes (on GOOS=%s GOARCH=%s, using compiler %q):\n% x\nwant %d bytes:\n% x", |
| len(got), runtime.GOOS, runtime.GOARCH, runtime.Compiler, got, len(want), want) |
| gotDisasm, err1 := disassemble(got) |
| wantDisasm, err2 := disassemble(want) |
| if err1 == nil && err2 == nil { |
| diffLines(t, string(gotDisasm), string(wantDisasm)) |
| } |
| } |
| } |
| |
| func TestEncodeActionInfo(t *testing.T) { |
| for _, res := range []string{"lores", "hires"} { |
| var e Encoder |
| e.Reset(Metadata{ |
| ViewBox: Rectangle{ |
| Min: f32.Vec2{-24, -24}, |
| Max: f32.Vec2{+24, +24}, |
| }, |
| Palette: DefaultPalette, |
| }) |
| e.HighResolutionCoordinates = res == "hires" |
| |
| e.StartPath(0, 0, -20) |
| e.AbsCubeTo(-11.05, -20, -20, -11.05, -20, 0) |
| e.RelSmoothCubeTo(8.95, 20, 20, 20) |
| e.RelSmoothCubeTo(20, -8.95, 20, -20) |
| e.AbsSmoothCubeTo(11.05, -20, 0, -20) |
| e.ClosePathRelMoveTo(2, 30) |
| e.RelHLineTo(-4) |
| e.AbsVLineTo(-2) |
| e.RelHLineTo(4) |
| e.RelVLineTo(12) |
| e.ClosePathRelMoveTo(0, -16) |
| e.RelHLineTo(-4) |
| e.RelVLineTo(-4) |
| e.RelHLineTo(4) |
| e.RelVLineTo(4) |
| e.ClosePathEndPath() |
| |
| testEncode(t, &e, "testdata/action-info."+res+".ivg") |
| } |
| } |
| |
| func TestEncodeArcs(t *testing.T) { |
| var e Encoder |
| |
| e.SetCReg(1, false, RGBAColor(color.RGBA{0xff, 0x00, 0x00, 0xff})) |
| e.SetCReg(2, false, RGBAColor(color.RGBA{0xff, 0xff, 0x00, 0xff})) |
| e.SetCReg(3, false, RGBAColor(color.RGBA{0x00, 0x00, 0x00, 0xff})) |
| e.SetCReg(4, false, RGBAColor(color.RGBA{0x00, 0x00, 0x80, 0xff})) |
| |
| e.StartPath(1, -10, 0) |
| e.RelHLineTo(-15) |
| e.RelArcTo(15, 15, 0, true, false, 15, -15) |
| e.ClosePathEndPath() |
| |
| e.StartPath(2, -14, -4) |
| e.RelVLineTo(-15) |
| e.RelArcTo(15, 15, 0, false, false, -15, 15) |
| e.ClosePathEndPath() |
| |
| const thirtyDegrees = 30.0 / 360 |
| e.StartPath(3, -15, 30) |
| e.RelLineTo(5.0, -2.5) |
| e.RelArcTo(2.5, 2.5, -thirtyDegrees, false, true, 5.0, -2.5) |
| e.RelLineTo(5.0, -2.5) |
| e.RelArcTo(2.5, 5.0, -thirtyDegrees, false, true, 5.0, -2.5) |
| e.RelLineTo(5.0, -2.5) |
| e.RelArcTo(2.5, 7.5, -thirtyDegrees, false, true, 5.0, -2.5) |
| e.RelLineTo(5.0, -2.5) |
| e.RelArcTo(2.5, 10.0, -thirtyDegrees, false, true, 5.0, -2.5) |
| e.RelLineTo(5.0, -2.5) |
| e.AbsVLineTo(30) |
| e.ClosePathEndPath() |
| |
| for largeArc := 0; largeArc <= 1; largeArc++ { |
| for sweep := 0; sweep <= 1; sweep++ { |
| e.StartPath(4, 10+8*float32(sweep), -28+8*float32(largeArc)) |
| e.RelArcTo(6, 3, 0, largeArc != 0, sweep != 0, 6, 3) |
| e.ClosePathEndPath() |
| } |
| } |
| |
| testEncode(t, &e, "testdata/arcs.ivg") |
| } |
| |
| func TestEncodeBlank(t *testing.T) { |
| var e Encoder |
| testEncode(t, &e, "testdata/blank.ivg") |
| } |
| |
| var cowbellGradients = []struct { |
| radial bool |
| |
| // Linear gradient coefficients. |
| x1, y1 float32 |
| x2, y2 float32 |
| tx, ty float32 |
| |
| // Radial gradient coefficients. |
| cx, cy, r float32 |
| transform f32.Aff3 |
| |
| stops []GradientStop |
| }{{ |
| // The 0th element is unused. |
| }, { |
| radial: true, |
| cx: -102.14, |
| cy: 20.272, |
| r: 18.012, |
| transform: f32.Aff3{ |
| .33050, -.50775, 65.204, |
| .17296, .97021, 16.495, |
| }, |
| stops: []GradientStop{ |
| {Offset: 0, Color: color.RGBA{0xed, 0xd4, 0x00, 0xff}}, |
| {Offset: 1, Color: color.RGBA{0xfc, 0xe9, 0x4f, 0xff}}, |
| }, |
| }, { |
| radial: true, |
| cx: -97.856, |
| cy: 26.719, |
| r: 18.61, |
| transform: f32.Aff3{ |
| .35718, -.11527, 51.072, |
| .044280, .92977, 7.6124, |
| }, |
| stops: []GradientStop{ |
| {Offset: 0, Color: color.RGBA{0xed, 0xd4, 0x00, 0xff}}, |
| {Offset: 1, Color: color.RGBA{0xfc, 0xe9, 0x4f, 0xff}}, |
| }, |
| }, { |
| x1: -16.183, |
| y1: 35.723, |
| x2: -18.75, |
| y2: 29.808, |
| tx: 48.438, |
| ty: -.22321, |
| stops: []GradientStop{ |
| {Offset: 0, Color: color.RGBA{0x39, 0x21, 0x00, 0xff}}, |
| {Offset: 1, Color: color.RGBA{0x0f, 0x08, 0x00, 0xff}}, |
| }, |
| }} |
| |
| var cowbellSVGData = []struct { |
| rgba color.RGBA |
| gradient int |
| d string |
| transform *f32.Aff3 |
| }{{ |
| gradient: 2, |
| d: "m5.6684 17.968l.265-4.407 13.453 19.78.301 8.304-14.019-23.677z", |
| }, { |
| gradient: 1, |
| d: "m19.299 33.482l-13.619-19.688 3.8435-2.684.0922-2.1237 4.7023-2.26 2.99 1.1274 4.56-1.4252 20.719 16.272-23.288 10.782z", |
| }, { |
| rgba: color.RGBA{0xfd * 127 / 255, 0xee * 127 / 255, 0x74 * 127 / 255, 127}, |
| d: "m19.285 32.845l-13.593-19.079 3.995-2.833.1689-2.0377 1.9171-.8635 18.829 18.965-11.317 5.848z", |
| }, { |
| rgba: color.RGBA{0xc4, 0xa0, 0x00, 0xff}, |
| d: "m19.211 40.055c-.11-.67-.203-2.301-.205-3.624l-.003-2.406-2.492-3.769c-3.334-5.044-11.448-17.211-9.6752-14.744.3211.447 1.6961 2.119 2.1874 2.656.4914.536 1.3538 1.706 1.9158 2.6 2.276 3.615 8.232 12.056 8.402 12.056.1 0 10.4-5.325 11.294-5.678.894-.354 11.25-4.542 11.45-4.342.506.506 1.27 7.466.761 8.08-.392.473-5.06 3.672-10.256 6.121-5.195 2.45-11.984 4.269-12.594 4.269-.421 0-.639-.338-.785-1.219z", |
| }, { |
| gradient: 3, |
| d: "m19.825 33.646c.422-.68 10.105-5.353 10.991-5.753s9.881-4.123 10.468-4.009c.512.099.844 6.017.545 6.703-.23.527-8.437 4.981-9.516 5.523-1.225.616-11.642 4.705-12.145 4.369-.553-.368-.707-6.245-.343-6.833z", |
| }, { |
| rgba: color.RGBA{0x00, 0x00, 0x00, 0xff}, |
| d: "m21.982 5.8789-4.865 1.457-2.553-1.1914-5.3355 2.5743l-.015625.29688-.097656 1.8672-4.1855 2.7383.36719 4.5996.054687.0957s3.2427 5.8034 6.584 11.654c1.6707 2.9255 3.3645 5.861 4.6934 8.0938.66442 1.1164 1.2366 2.0575 1.6719 2.7363.21761.33942.40065.6121.54883.81641.07409.10215.13968.18665.20312.25976.06345.07312.07886.13374.27148.22461.27031.12752.38076.06954.54102.04883.16025-.02072.34015-.05724.55078-.10938.42126-.10427.95998-.26728 1.584-.4707 1.248-.40685 2.8317-.97791 4.3926-1.5586 3.1217-1.1614 6.1504-2.3633 6.1504-2.3633l.02539-.0098.02539-.01367s2.5368-1.3591 5.1211-2.8027c1.2922-.72182 2.5947-1.4635 3.6055-2.0723.50539-.30438.93732-.57459 1.2637-.79688.16318-.11114.29954-.21136.41211-.30273.11258-.09138.19778-.13521.30273-.32617.16048-.292.13843-.48235.1543-.78906s.01387-.68208.002-1.1094c-.02384-.8546-.09113-1.9133-.17188-2.9473-.161-2.067-.373-4.04-.373-4.04l-.021-.211-20.907-16.348zm-.209 1.1055 20.163 15.766c.01984.1875.19779 1.8625.34961 3.8066.08004 1.025.14889 2.0726.17188 2.8965.01149.41192.01156.76817-.002 1.0293-.01351.26113-.09532.47241-.0332.35938.05869-.10679.01987-.0289-.05664.0332s-.19445.14831-.34375.25c-.29859.20338-.72024.46851-1.2168.76758-.99311.59813-2.291 1.3376-3.5781 2.0566-2.5646 1.4327-5.0671 2.7731-5.0859 2.7832-.03276.01301-3.0063 1.1937-6.0977 2.3438-1.5542.5782-3.1304 1.1443-4.3535 1.543-.61154.19936-1.1356.35758-1.5137.45117-.18066.04472-.32333.07255-.41992.08594-.02937-.03686-.05396-.06744-.0957-.125-.128-.176-.305-.441-.517-.771-.424-.661-.993-1.594-1.655-2.705-1.323-2.223-3.016-5.158-4.685-8.08-3.3124-5.8-6.4774-11.465-6.5276-11.555l-.3008-3.787 4.1134-2.692.109-2.0777 4.373-2.1133 2.469 1.1523 4.734-1.4179z", |
| }} |
| |
| func inv(x *f32.Aff3) f32.Aff3 { |
| invDet := 1 / (x[0]*x[4] - x[1]*x[3]) |
| return f32.Aff3{ |
| +x[4] * invDet, |
| -x[1] * invDet, |
| (x[1]*x[5] - x[2]*x[4]) * invDet, |
| -x[3] * invDet, |
| +x[0] * invDet, |
| (x[2]*x[3] - x[0]*x[5]) * invDet, |
| } |
| } |
| |
| func TestEncodeCowbell(t *testing.T) { |
| var e Encoder |
| e.Reset(Metadata{ |
| ViewBox: Rectangle{ |
| Min: f32.Vec2{0, 0}, |
| Max: f32.Vec2{+48, +48}, |
| }, |
| Palette: DefaultPalette, |
| }) |
| |
| for _, data := range cowbellSVGData { |
| if data.rgba != (color.RGBA{}) { |
| e.SetCReg(0, false, RGBAColor(data.rgba)) |
| } else if data.gradient != 0 { |
| g := cowbellGradients[data.gradient] |
| if g.radial { |
| iform := inv(&g.transform) |
| iform[2] -= g.cx |
| iform[5] -= g.cy |
| for i := range iform { |
| iform[i] /= g.r |
| } |
| e.SetGradient(10, 10, true, iform, GradientSpreadPad, g.stops) |
| } else { |
| x1 := g.x1 + g.tx |
| y1 := g.y1 + g.ty |
| x2 := g.x2 + g.tx |
| y2 := g.y2 + g.ty |
| e.SetLinearGradient(10, 10, x1, y1, x2, y2, GradientSpreadPad, g.stops) |
| } |
| } |
| |
| if err := encodePathData(&e, data.d, 0, false); err != nil { |
| t.Fatal(err) |
| } |
| } |
| |
| testEncode(t, &e, "testdata/cowbell.ivg") |
| } |
| |
| func TestEncodeElliptical(t *testing.T) { |
| var e Encoder |
| |
| const ( |
| cx, cy = -20, -10 |
| rx, ry = 0, 24 |
| sx, sy = 30, 15 |
| ) |
| |
| e.SetEllipticalGradient(10, 10, cx, cy, rx, ry, sx, sy, GradientSpreadReflect, []GradientStop{ |
| {Offset: 0, Color: color.RGBA{0xc0, 0x00, 0x00, 0xff}}, |
| {Offset: 1, Color: color.RGBA{0x00, 0x00, 0xc0, 0xff}}, |
| }) |
| e.StartPath(0, -32, -32) |
| e.AbsHLineTo(+32) |
| e.AbsVLineTo(+32) |
| e.AbsHLineTo(-32) |
| e.ClosePathEndPath() |
| |
| e.SetCReg(0, false, RGBAColor(color.RGBA{0xff, 0xff, 0xff, 0xff})) |
| diamond := func(x, y float32) { |
| e.StartPath(0, x-1, y) |
| e.AbsLineTo(x, y-1) |
| e.AbsLineTo(x+1, y) |
| e.AbsLineTo(x, y+1) |
| e.ClosePathEndPath() |
| } |
| diamond(cx, cy) |
| diamond(cx+rx, cy+ry) |
| diamond(cx+sx, cy+sy) |
| |
| testEncode(t, &e, "testdata/elliptical.ivg") |
| } |
| |
| var faviconColors = []color.RGBA{ |
| {0x76, 0xe1, 0xfe, 0xff}, |
| {0x38, 0x4e, 0x54, 0xff}, |
| {0xff, 0xff, 0xff, 0xff}, |
| {0x17, 0x13, 0x11, 0xff}, |
| {0x00, 0x00, 0x00, 0x54}, |
| {0xff, 0xfc, 0xfb, 0xff}, |
| {0xc3, 0x8c, 0x74, 0xff}, |
| {0x23, 0x20, 0x1f, 0xff}, |
| } |
| |
| var faviconSVGData = []struct { |
| faviconColorsIndex int |
| d string |
| }{{ |
| faviconColorsIndex: 1, |
| d: "m16.092 1.002c-1.1057.01-2.2107.048844-3.3164.089844-2.3441.086758-4.511.88464-6.2832 2.1758a3.8208 3.5794 29.452 0 0 -.8947 -.6856 3.8208 3.5794 29.452 0 0 -5.0879 1.2383 3.8208 3.5794 29.452 0 0 1.5664 4.9961 3.8208 3.5794 29.452 0 0 .3593 .1758c-.2784.9536-.4355 1.9598-.4355 3.0078v20h28v-20c0-1.042-.152-2.0368-.418-2.9766a3.5794 3.8208 60.548 0 0 .43359 -.20703 3.5794 3.8208 60.548 0 0 1.5684 -4.9961 3.5794 3.8208 60.548 0 0 -5.0879 -1.2383 3.5794 3.8208 60.548 0 0 -.92969 .72461c-1.727-1.257-3.843-2.0521-6.1562-2.2148-1.1058-.078-2.2126-.098844-3.3184-.089844z", |
| }, { |
| faviconColorsIndex: 0, |
| d: "m16 3c-4.835 0-7.9248 1.0791-9.7617 2.8906-.4777-.4599-1.2937-1.0166-1.6309-1.207-.9775-.5520-2.1879-.2576-2.7051.6582-.5171.9158-.1455 2.1063.8321 2.6582.2658.1501 1.2241.5845 1.7519.7441-.3281.9946-.4863 2.0829-.4863 3.2559v20h24c-.049-7.356 0-18 0-20 0-1.209-.166-2.3308-.516-3.3496.539-.2011 1.243-.5260 1.463-.6504.978-.5519 1.351-1.7424.834-2.6582s-1.729-1.2102-2.707-.6582c-.303.1711-.978.6356-1.463 1.0625-1.854-1.724-4.906-2.7461-9.611-2.7461z", |
| }, { |
| faviconColorsIndex: 1, |
| d: "m3.0918 5.9219c-.060217.00947-.10772.020635-.14648.033203-.019384.00628-.035462.013581-.052734.021484-.00864.00395-.019118.00825-.03125.015625-.00607.00369-.011621.00781-.021484.015625-.00493.00391-.017342.015389-.017578.015625-.0002366.0002356-.025256.031048-.025391.03125a.19867 .19867 0 0 0 .26367 .28320c.0005595-.0002168.00207-.00128.00391-.00195a.19867 .19867 0 0 0 .00391 -.00195c.015939-.00517.045148-.013113.085937-.019531.081581-.012836.20657-.020179.36719.00391.1020.0152.2237.0503.3535.0976-.3277.0694-.5656.1862-.7227.3145-.1143.0933-.1881.1903-.2343.2695-.023099.0396-.039499.074216-.050781.10547-.00564.015626-.00989.029721-.013672.046875-.00189.00858-.00458.017085-.00586.03125-.0006392.00708-.0005029.014724 0 .027344.0002516.00631.00192.023197.00195.023437.0000373.0002412.0097.036937.00977.037109a.19867 .19867 0 0 0 .38477 -.039063 .19867 .19867 0 0 0 0 -.00195c.00312-.00751.00865-.015947.017578-.03125.0230-.0395.0660-.0977.1425-.1601.1530-.1250.4406-.2702.9863-.2871a.19930 .19930 0 0 0 .082031 -.019531c.12649.089206.25979.19587.39844.32422a.19867 .19867 0 1 0 .2696 -.2911c-.6099-.5646-1.1566-.7793-1.5605-.8398-.2020-.0303-.3679-.0229-.4883-.0039z", |
| }, { |
| faviconColorsIndex: 1, |
| d: "m28.543 5.8203c-.12043-.018949-.28631-.026379-.48828.00391-.40394.060562-.94869.27524-1.5586.83984a.19867 .19867 0 1 0 .26953 .29102c.21354-.19768.40814-.33222.59180-.44141.51624.023399.79659.16181.94531.28320.07652.062461.11952.12063.14258.16016.0094.016037.01458.025855.01758.033203a.19867 .19867 0 0 0 .38476 .039063c.000062-.0001719.0097-.036868.0098-.037109.000037-.0002412.0017-.017125.002-.023437.000505-.012624.000639-.020258 0-.027344-.0013-.01417-.004-.022671-.0059-.03125-.0038-.017158-.008-.031248-.01367-.046875-.01128-.031254-.02768-.067825-.05078-.10742-.04624-.079195-.12003-.17424-.23437-.26758-.11891-.097066-.28260-.18832-.49609-.25781.01785-.00328.03961-.011119.05664-.013672.16062-.024082.28561-.016738.36719-.00391.03883.00611.06556.012409.08203.017578.000833.0002613.0031.0017.0039.00195a.19867 .19867 0 0 0 .271 -.2793c-.000135-.0002016-.02515-.031014-.02539-.03125-.000236-.0002356-.01265-.011717-.01758-.015625-.0099-.00782-.01737-.01194-.02344-.015625-.01213-.00737-.02066-.011673-.0293-.015625-.01727-.0079-.03336-.013247-.05273-.019531-.03877-.012568-.08822-.025682-.14844-.035156z", |
| }, { |
| faviconColorsIndex: 2, |
| d: "m15.171 9.992a4.8316 4.8316 0 0 1 -4.832 4.832 4.8316 4.8316 0 0 1 -4.8311 -4.832 4.8316 4.8316 0 0 1 4.8311 -4.8316 4.8316 4.8316 0 0 1 4.832 4.8316z", |
| }, { |
| faviconColorsIndex: 2, |
| d: "m25.829 9.992a4.6538 4.6538 0 0 1 -4.653 4.654 4.6538 4.6538 0 0 1 -4.654 -4.654 4.6538 4.6538 0 0 1 4.654 -4.6537 4.6538 4.6538 0 0 1 4.653 4.6537z", |
| }, { |
| faviconColorsIndex: 3, |
| d: "m14.377 9.992a1.9631 1.9631 0 0 1 -1.963 1.963 1.9631 1.9631 0 0 1 -1.963 -1.963 1.9631 1.9631 0 0 1 1.963 -1.963 1.9631 1.9631 0 0 1 1.963 1.963z", |
| }, { |
| faviconColorsIndex: 3, |
| d: "m25.073 9.992a1.9631 1.9631 0 0 1 -1.963 1.963 1.9631 1.9631 0 0 1 -1.963 -1.963 1.9631 1.9631 0 0 1 1.963 -1.963 1.9631 1.9631 0 0 1 1.963 1.963z", |
| }, { |
| faviconColorsIndex: 4, |
| d: "m14.842 15.555h2.2156c.40215 0 .72590.3237.72590.7259v2.6545c0 .4021-.32375.7259-.72590.7259h-2.2156c-.40215 0-.72590-.3238-.72590-.7259v-2.6545c0-.4022.32375-.7259.72590-.7259z", |
| }, { |
| faviconColorsIndex: 5, |
| d: "m14.842 14.863h2.2156c.40215 0 .72590.3238.72590.7259v2.6546c0 .4021-.32375.7259-.72590.7259h-2.2156c-.40215 0-.72590-.3238-.72590-.7259v-2.6546c0-.4021.32375-.7259.72590-.7259z", |
| }, { |
| faviconColorsIndex: 4, |
| d: "m20 16.167c0 .838-.87123 1.2682-2.1448 1.1659-.02366 0-.04795-.6004-.25415-.5832-.50367.042-1.0959-.02-1.686-.02-.61294 0-1.2063.1826-1.6855.017-.11023-.038-.17830.5838-.26153.5816-1.2437-.033-2.0788-.3383-2.0788-1.1618 0-1.2118 1.8156-2.1941 4.0554-2.1941 2.2397 0 4.0554.9823 4.0554 2.1941z", |
| }, { |
| faviconColorsIndex: 6, |
| d: "m19.977 15.338c0 .5685-.43366.8554-1.1381 1.0001-.29193.06-.63037.096-1.0037.1166-.56405.032-1.2078.031-1.8912.031-.67283 0-1.3072 0-1.8649-.029-.30627-.017-.58943-.043-.84316-.084-.81383-.1318-1.325-.417-1.325-1.0344 0-1.1601 1.8056-2.1006 4.033-2.1006s4.033.9405 4.033 2.1006z", |
| }, { |
| faviconColorsIndex: 7, |
| d: "m18.025 13.488a2.0802 1.3437 0 0 1 -2.0802 1.3437 2.0802 1.3437 0 0 1 -2.0802 -1.3437 2.0802 1.3437 0 0 1 2.0802 -1.3437 2.0802 1.3437 0 0 1 2.0802 1.3437z", |
| }} |
| |
| func TestEncodeFavicon(t *testing.T) { |
| // Set up a base color for theming the favicon, gopher blue by default. |
| pal := DefaultPalette |
| pal[0] = faviconColors[0] // color.RGBA{0x76, 0xe1, 0xfe, 0xff} |
| |
| var e Encoder |
| e.Reset(Metadata{ |
| ViewBox: DefaultViewBox, |
| Palette: pal, |
| }) |
| |
| // The favicon graphic also uses a dark version of that base color. blend |
| // is 75% dark (CReg[63]) and 25% the base color (pal[0]). |
| dark := color.RGBA{0x23, 0x1d, 0x1b, 0xff} |
| blend := BlendColor(0x40, 0xff, 0x80) |
| |
| // First, set CReg[63] to dark, then set CReg[63] to the blend of that dark |
| // color with pal[0]. |
| e.SetCReg(1, false, RGBAColor(dark)) |
| e.SetCReg(1, false, blend) |
| |
| // Check that, for the suggested palette, blend resolves to the |
| // (non-themable) SVG file's faviconColors[1]. |
| got := blend.Resolve(&pal, &[64]color.RGBA{ |
| 63: dark, |
| }) |
| want := faviconColors[1] |
| if got != want { |
| t.Fatalf("Blend:\ngot %#02x\nwant %#02x", got, want) |
| } |
| |
| // Set aside the remaining, non-themable colors. |
| remainingColors := faviconColors[2:] |
| |
| seenFCI2 := false |
| for _, data := range faviconSVGData { |
| adj := uint8(data.faviconColorsIndex) |
| if adj >= 2 { |
| if !seenFCI2 { |
| seenFCI2 = true |
| for i, c := range remainingColors { |
| e.SetCReg(uint8(i), false, RGBAColor(c)) |
| } |
| } |
| adj -= 2 |
| } |
| |
| if err := encodePathData(&e, data.d, adj, true); err != nil { |
| t.Fatal(err) |
| } |
| } |
| |
| testEncode(t, &e, "testdata/favicon.ivg") |
| } |
| |
| func encodePathData(e *Encoder, d string, adj uint8, normalizeTo64X64 bool) error { |
| var args [7]float32 |
| prevN, prevVerb := 0, byte(0) |
| for first := true; d != "z"; first = false { |
| n, verb, implicit := 0, d[0], false |
| switch d[0] { |
| case 'H', 'h', 'V', 'v': |
| n = 1 |
| case 'L', 'M', 'l', 'm': |
| n = 2 |
| case 'S', 's': |
| n = 4 |
| case 'C', 'c': |
| n = 6 |
| case 'A', 'a': |
| n = 7 |
| case 'z': |
| n = 0 |
| default: |
| if prevVerb == '\x00' { |
| panic("unrecognized verb") |
| } |
| n, verb, implicit = prevN, prevVerb, true |
| } |
| prevN, prevVerb = n, verb |
| if prevVerb == 'M' { |
| prevVerb = 'L' |
| } else if prevVerb == 'm' { |
| prevVerb = 'l' |
| } |
| if !implicit { |
| d = d[1:] |
| } |
| |
| for i := 0; i < n; i++ { |
| nDots := 0 |
| if d[0] == '.' { |
| nDots = 1 |
| } |
| j := 1 |
| for ; ; j++ { |
| switch d[j] { |
| case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9': |
| continue |
| case '.': |
| nDots++ |
| if nDots == 1 { |
| continue |
| } |
| } |
| break |
| } |
| f, err := strconv.ParseFloat(d[:j], 64) |
| if err != nil { |
| return err |
| } |
| args[i] = float32(f) |
| for ; d[j] == ' ' || d[j] == ','; j++ { |
| } |
| d = d[j:] |
| } |
| |
| if normalizeTo64X64 { |
| // The original SVG is 32x32 units, with the top left being (0, 0). |
| // Normalize to 64x64 units, with the center being (0, 0). |
| if verb == 'A' { |
| args[0] = 2 * args[0] |
| args[1] = 2 * args[1] |
| args[2] /= 360 |
| args[5] = 2*args[5] - 32 |
| args[6] = 2*args[6] - 32 |
| } else if verb == 'a' { |
| args[0] = 2 * args[0] |
| args[1] = 2 * args[1] |
| args[2] /= 360 |
| args[5] = 2 * args[5] |
| args[6] = 2 * args[6] |
| } else if first || ('A' <= verb && verb <= 'Z') { |
| for i := range args { |
| args[i] = 2*args[i] - 32 |
| } |
| } else { |
| for i := range args { |
| args[i] = 2 * args[i] |
| } |
| } |
| } else if verb == 'A' || verb == 'a' { |
| args[2] /= 360 |
| } |
| |
| if first { |
| first = false |
| e.StartPath(adj, args[0], args[1]) |
| continue |
| } |
| switch verb { |
| case 'H': |
| e.AbsHLineTo(args[0]) |
| case 'h': |
| e.RelHLineTo(args[0]) |
| case 'V': |
| e.AbsVLineTo(args[0]) |
| case 'v': |
| e.RelVLineTo(args[0]) |
| case 'L': |
| e.AbsLineTo(args[0], args[1]) |
| case 'l': |
| e.RelLineTo(args[0], args[1]) |
| case 'm': |
| e.ClosePathRelMoveTo(args[0], args[1]) |
| case 'S': |
| e.AbsSmoothCubeTo(args[0], args[1], args[2], args[3]) |
| case 's': |
| e.RelSmoothCubeTo(args[0], args[1], args[2], args[3]) |
| case 'C': |
| e.AbsCubeTo(args[0], args[1], args[2], args[3], args[4], args[5]) |
| case 'c': |
| e.RelCubeTo(args[0], args[1], args[2], args[3], args[4], args[5]) |
| case 'A': |
| e.AbsArcTo(args[0], args[1], args[2], args[3] != 0, args[4] != 0, args[5], args[6]) |
| case 'a': |
| e.RelArcTo(args[0], args[1], args[2], args[3] != 0, args[4] != 0, args[5], args[6]) |
| case 'z': |
| // No-op. |
| default: |
| panic("unrecognized verb") |
| } |
| } |
| e.ClosePathEndPath() |
| return nil |
| } |
| |
| func TestEncodeGradient(t *testing.T) { |
| rgb := []GradientStop{ |
| {Offset: 0.00, Color: color.RGBA{0xff, 0x00, 0x00, 0xff}}, |
| {Offset: 0.25, Color: color.RGBA{0x00, 0xff, 0x00, 0xff}}, |
| {Offset: 0.50, Color: color.RGBA{0x00, 0x00, 0xff, 0xff}}, |
| {Offset: 1.00, Color: color.RGBA{0x00, 0x00, 0x00, 0xff}}, |
| } |
| cmy := []GradientStop{ |
| {Offset: 0.00, Color: color.RGBA{0x00, 0xff, 0xff, 0xff}}, |
| {Offset: 0.25, Color: color.RGBA{0xff, 0xff, 0xff, 0xff}}, |
| {Offset: 0.50, Color: color.RGBA{0xff, 0x00, 0xff, 0xff}}, |
| {Offset: 0.75, Color: color.RGBA{0x00, 0x00, 0x00, 0x00}}, |
| {Offset: 1.00, Color: color.RGBA{0xff, 0xff, 0x00, 0xff}}, |
| } |
| |
| var e Encoder |
| |
| e.SetLinearGradient(10, 10, -12, -30, +12, -18, GradientSpreadNone, rgb) |
| e.StartPath(0, -30, -30) |
| e.AbsHLineTo(+30) |
| e.AbsVLineTo(-18) |
| e.AbsHLineTo(-30) |
| e.ClosePathEndPath() |
| |
| e.SetLinearGradient(10, 10, -12, -14, +12, -2, GradientSpreadPad, cmy) |
| e.StartPath(0, -30, -14) |
| e.AbsHLineTo(+30) |
| e.AbsVLineTo(-2) |
| e.AbsHLineTo(-30) |
| e.ClosePathEndPath() |
| |
| e.SetCircularGradient(10, 10, -8, 8, 0, 16, GradientSpreadReflect, rgb) |
| e.StartPath(0, -30, +2) |
| e.AbsHLineTo(+30) |
| e.AbsVLineTo(+14) |
| e.AbsHLineTo(-30) |
| e.ClosePathEndPath() |
| |
| e.SetCircularGradient(10, 10, -8, 24, 0, 16, GradientSpreadRepeat, cmy) |
| e.StartPath(0, -30, +18) |
| e.AbsHLineTo(+30) |
| e.AbsVLineTo(+30) |
| e.AbsHLineTo(-30) |
| e.ClosePathEndPath() |
| |
| testEncode(t, &e, "testdata/gradient.ivg") |
| } |
| |
| func TestEncodeLODPolygon(t *testing.T) { |
| var e Encoder |
| |
| poly := func(n int) { |
| const r = 28 |
| angle := 2 * math.Pi / float64(n) |
| e.StartPath(0, r, 0) |
| for i := 1; i < n; i++ { |
| e.AbsLineTo( |
| float32(r*math.Cos(angle*float64(i))), |
| float32(r*math.Sin(angle*float64(i))), |
| ) |
| } |
| e.ClosePathEndPath() |
| } |
| |
| e.StartPath(0, -28, -20) |
| e.AbsVLineTo(-28) |
| e.AbsHLineTo(-20) |
| e.ClosePathEndPath() |
| |
| e.SetLOD(0, 80) |
| poly(3) |
| |
| e.SetLOD(80, positiveInfinity) |
| poly(5) |
| |
| e.SetLOD(0, positiveInfinity) |
| e.StartPath(0, +28, +20) |
| e.AbsVLineTo(+28) |
| e.AbsHLineTo(+20) |
| e.ClosePathEndPath() |
| |
| testEncode(t, &e, "testdata/lod-polygon.ivg") |
| } |
| |
| var video005PrimitiveSVGData = []struct { |
| r, g, b uint32 |
| x0, y0 int |
| x1, y1 int |
| x2, y2 int |
| }{ |
| {0x17, 0x06, 0x05, 162, 207, 271, 186, 195, -16}, |
| {0xe9, 0xf5, 0xf8, -16, 179, 140, -11, 16, -8}, |
| {0x00, 0x04, 0x27, 97, 96, 221, 21, 214, 111}, |
| {0x89, 0xd9, 0xff, 262, -6, 271, 104, 164, -16}, |
| {0x94, 0xbd, 0xc5, 204, 104, 164, 207, 59, 104}, |
| {0xd4, 0x81, 0x3d, -16, 36, 123, 195, -16, 194}, |
| {0x00, 0x00, 0x00, 164, 19, 95, 77, 138, 13}, |
| {0x39, 0x11, 0x19, 50, 143, 115, 185, -4, 165}, |
| {0x00, 0x3d, 0x81, 86, 109, 53, 76, 90, 24}, |
| {0xfc, 0xc6, 0x9c, 31, 161, 80, 105, -16, 28}, |
| {0x9e, 0xdd, 0xff, 201, -7, 31, -16, 2, 60}, |
| {0x01, 0x20, 0x39, 132, 85, 240, -5, 173, 130}, |
| {0xfd, 0xbc, 0x8f, 193, 127, 231, 94, 250, 124}, |
| {0x43, 0x06, 0x00, 251, 207, 237, 83, 271, 97}, |
| {0x80, 0xbf, 0xee, 117, 134, 88, 177, 90, 28}, |
| {0x00, 0x00, 0x00, 127, 38, 172, 68, 223, 55}, |
| {0x19, 0x0e, 0x16, 201, 204, 161, 101, 271, 192}, |
| {0xf6, 0xaa, 0x71, 201, 164, 226, 141, 261, 152}, |
| {0xe0, 0x36, 0x00, -16, -2, 29, -16, -6, 58}, |
| {0xff, 0xe4, 0xba, 146, 45, 118, 75, 148, 76}, |
| {0x00, 0x00, 0x12, 118, 44, 107, 109, 100, 51}, |
| {0xbd, 0xd5, 0xe4, 271, 41, 253, -16, 211, 89}, |
| {0x52, 0x00, 0x00, 87, 127, 83, 150, 55, 111}, |
| {0x00, 0xb3, 0xa1, 124, 185, 135, 207, 194, 176}, |
| {0x22, 0x00, 0x00, 59, 151, 33, 124, 52, 169}, |
| {0xbe, 0xcb, 0xcb, 149, 42, 183, -16, 178, 47}, |
| {0xff, 0xd4, 0xb1, 211, 119, 184, 100, 182, 124}, |
| {0xff, 0xe1, 0x39, 73, 207, 140, 180, -13, 187}, |
| {0xa7, 0xb0, 0xad, 122, 181, 200, 182, 93, 82}, |
| {0x00, 0x00, 0x00, 271, 168, 170, 185, 221, 207}, |
| } |
| |
| func TestEncodeVideo005Primitive(t *testing.T) { |
| // The division by 4 is because the SVG width is 256 units and the IconVG |
| // width is 64 (from -32 to +32). |
| // |
| // The subtraction by 0.5 is because the SVG file contains the line: |
| // <g transform="translate(0.5 0.5)"> |
| scaleX := func(i int) float32 { return float32(i)/4 - (32 - 0.5/4) } |
| scaleY := func(i int) float32 { return float32(i)/4 - (24 - 0.5/4) } |
| |
| var e Encoder |
| e.Reset(Metadata{ |
| ViewBox: Rectangle{ |
| Min: f32.Vec2{-32, -24}, |
| Max: f32.Vec2{+32, +24}, |
| }, |
| Palette: DefaultPalette, |
| }) |
| |
| e.SetCReg(0, false, RGBAColor(color.RGBA{0x7c, 0x7e, 0x7c, 0xff})) |
| e.StartPath(0, -32, -24) |
| e.AbsHLineTo(+32) |
| e.AbsVLineTo(+24) |
| e.AbsHLineTo(-32) |
| e.ClosePathEndPath() |
| |
| for _, v := range video005PrimitiveSVGData { |
| e.SetCReg(0, false, RGBAColor(color.RGBA{ |
| uint8(v.r * 128 / 255), |
| uint8(v.g * 128 / 255), |
| uint8(v.b * 128 / 255), |
| 128, |
| })) |
| e.StartPath(0, scaleX(v.x0), scaleY(v.y0)) |
| e.AbsLineTo(scaleX(v.x1), scaleY(v.y1)) |
| e.AbsLineTo(scaleX(v.x2), scaleY(v.y2)) |
| e.ClosePathEndPath() |
| } |
| |
| testEncode(t, &e, "testdata/video-005.primitive.ivg") |
| } |
