tamakyi
b35c2a8f45
上一版改成按模块整数倍出图时，静默区仍然画在图像里：49 个模块（41 + 4×2） 挤进 165px 只剩 3px/模块、符号 111px，比改造前的 135px 还小 —— 这是自己引入的 回归。测试卡上验证时才发现：二维码在 960 宽的卡里只占 111px，微信/QQ 二次 压缩到 480 宽后模块不足 1.5px，gozxing 直接解不出来。 - generateQR 改 qr.DisableBorder：图像只输出符号，静默区交给承载它的白色卡片 （四周留白 30px 以上，远超 4 模块）。符号尺寸按 size/modules 取整，最多 浪费一个模块宽度 - 调用方按实际符号尺寸居中与排版，不再假设等于目标尺寸 - 单题卡 QQRSize 128 → 150：37 模块的题目链接因此拿到 4px/模块（原 3px） - 卡内垂直间距 26/21/21/15 → 24/20/20/16，落在 4px 栅格上 验证：profile 卡二维码 111px → 148px（37 模块 × 4px，用满 90%），单题卡 111px → 148px；gozxing 解码 960 原图、75% 缩放图均能读出正确 URL（含内嵌 头像）。守门测试加了两条：符号宽度必须等于 modules×perModule 且吃掉目标尺寸 ≥80%（变异成「含静默区」立刻 FAIL），头像测试改判四角必须是定位图案而非 白色（防止符号被裁切）。
292 lines
9.2 KiB
Go
292 lines
9.2 KiB
Go
package question
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import (
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"image"
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"image/color"
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"image/draw"
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"image/png"
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"os"
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"path/filepath"
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"testing"
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"github.com/golang/freetype"
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"github.com/golang/freetype/truetype"
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qrcode "github.com/skip2/go-qrcode"
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"github.com/tamakyi/TamaBox/internal/conf"
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)
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// 分享卡测试需要一份真实字体；中文站点部署时 conf.App.FontPath 必然存在，
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// 本机开发/CI 缺失时跳过，避免把「没有字体」当成排版错误。
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func TestMain(m *testing.M) {
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if _, err := os.Stat(conf.App.FontPath); err != nil {
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for _, candidate := range []string{
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"C:/Windows/Fonts/NotoSansSC-VF.ttf",
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"C:/Windows/Fonts/msyh.ttc",
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"/usr/share/fonts/opentype/noto/NotoSansCJK-Regular.ttc",
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} {
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if _, err := os.Stat(candidate); err == nil {
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conf.App.FontPath = candidate
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break
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}
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}
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}
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os.Exit(m.Run())
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}
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func requireFont(t *testing.T) *truetype.Font {
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t.Helper()
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ft, err := getFont()
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if err != nil {
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t.Skipf("no usable font (%v), skip share card layout tests", err)
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}
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return ft
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}
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// measureTextWidth 必须与 freetype 实际笔位推进一致，否则居中会重新出现偏移。
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func TestMeasureTextWidthMatchesAdvance(t *testing.T) {
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requireFont(t)
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cases := []struct {
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text string
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size float64
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}{
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{"https://box.shiroko.one/_/tamakyi", FontSizeLink},
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{"box.shiroko.one/_/tamakyi", 13},
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{"ask.some-quite-long-domain-name.example.com", LinkMinSize},
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{"Powered by 狼的提问箱", FontSizeFooter},
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{"扫码向我匿名提问", FontSizeQRHint},
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}
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for _, c := range cases {
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dst := image.NewRGBA(image.Rect(0, 0, 1400, 80))
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fctx := freetype.NewContext()
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fctx.SetFont(requireFont(t))
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fctx.SetDPI(72)
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fctx.SetFontSize(c.size)
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fctx.SetSrc(image.NewUniform(color.Black))
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fctx.SetDst(dst)
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pen, err := fctx.DrawString(c.text, freetype.Pt(0, 60))
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if err != nil {
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t.Fatalf("draw %q: %v", c.text, err)
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}
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want := float64(pen.X) / 64.0
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if got := measureTextWidth(c.text, c.size); got != want {
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t.Errorf("%q @%.1f: measure=%.2f, advance=%.2f", c.text, c.size, got, want)
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}
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}
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}
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// 任意长度的链接都必须收进卡片，且不得缩到不可读。
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func TestLayoutLinkFitsCard(t *testing.T) {
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requireFont(t)
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urls := []string{
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"box.shiroko.one/_/tamakyi",
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"box-dev-api.337845818.best/_/tamakyi",
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"ask.some-quite-long-domain-name.example.com/_/tamakyi",
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"questions.tamabox-community.example.org/anon/box/_/a-rather-long-handle-name",
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"averyveryveryverylongdomainnamethatkeepsgoingandonandonforever.example/_/x",
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}
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for _, u := range urls {
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lines, size := layoutLink(u)
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if size < LinkMinSize {
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t.Errorf("%q: font size %.2f below floor %.2f", u, size, LinkMinSize)
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}
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if len(lines) > 2 {
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t.Errorf("%q: got %d lines, want <=2", u, len(lines))
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}
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for _, line := range lines {
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if w := measureTextWidth(line, size); w > float64(LinkMaxWidth) {
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t.Errorf("%q: line %q is %.1fpx, card allows %dpx", u, line, w, LinkMaxWidth)
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}
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}
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}
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}
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// 居中必须落在二维码卡片中线上（按真实着墨边界判断，允许左右侧边距带来的 3px 内偏差）。
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func TestDrawTextCenteredIsCentered(t *testing.T) {
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requireFont(t)
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cx := QRCardX + QRCardW/2
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for _, text := range []string{
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"box.shiroko.one/_/tamakyi",
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"box-dev-api.337845818.best/_/tamakyi",
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"Powered by 狼的提问箱",
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} {
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canvas := image.NewRGBA(image.Rect(0, 0, CardWidth, CardHeight))
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draw.Draw(canvas, canvas.Bounds(), &image.Uniform{ColorWhite}, image.Point{}, draw.Src)
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fctx := freetype.NewContext()
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fctx.SetFont(requireFont(t))
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fctx.SetDPI(72)
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drawTextCentered(canvas, text, cx, 300, FontSizeLink, ColorDarkText, fctx)
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minX, maxX := -1, -1
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for x := 0; x < CardWidth; x++ {
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for y := 250; y < 320; y++ {
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if r, _, _, a := canvas.At(x, y).RGBA(); a > 40 && r < 0x8000 {
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if minX < 0 {
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minX = x
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}
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maxX = x
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break
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}
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}
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}
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if minX < 0 {
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t.Fatalf("%q: nothing drawn", text)
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}
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if center := (minX + maxX) / 2; abs(center-cx) > 3 {
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t.Errorf("%q: ink center %d, want %d (±3)", text, center, cx)
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}
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if maxX > QRCardX+QRCardW || minX < QRCardX {
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t.Errorf("%q: ink [%d,%d] escapes card [%d,%d]", text, minX, maxX, QRCardX, QRCardX+QRCardW)
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}
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}
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}
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// 内嵌头像必须画在中心，且符号本身不被裁切（四角是定位图案，应当是黑的）。
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func TestGenerateQRWithLogo(t *testing.T) {
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logo := image.NewRGBA(image.Rect(0, 0, 64, 40))
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draw.Draw(logo, logo.Bounds(), &image.Uniform{color.RGBA{200, 40, 40, 255}}, image.Point{}, draw.Src)
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img, err := generateQR("https://box.shiroko.one/_/tamakyi", logo, QRCodeSize)
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if err != nil {
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t.Fatal(err)
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}
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cx, cy := img.Bounds().Dx()/2, img.Bounds().Dy()/2
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r, _, _, _ := img.At(cx, cy).RGBA()
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if r < 0x8000 || r > 0xf000 {
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t.Errorf("center pixel should be the logo color, got %#x", r)
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}
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for _, p := range []image.Point{{0, 0}, {img.Bounds().Dx() - 1, 0}, {0, img.Bounds().Dy() - 1}} {
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r, g, b, _ := img.At(p.X, p.Y).RGBA()
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if r == 0xffff && g == 0xffff && b == 0xffff {
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t.Errorf("corner %v is white: finder pattern missing, symbol likely cropped", p)
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}
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}
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}
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func abs(v int) int {
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if v < 0 {
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return -v
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}
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return v
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}
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// 二维码必须按模块整数倍绘制：任何宽度落差的游程都意味着模块被拉伸，
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// 小尺寸（微信/QQ 二次压缩后）最容易出现「扫不动」。同时必须把目标尺寸用满，
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// 否则模块像素偏小，实际可扫距离大幅缩水。
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func TestGenerateQRIsModuleAligned(t *testing.T) {
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const url = "https://box.shiroko.one/_/tamakyi"
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for _, size := range []int{QRCodeSize, QQRSize} {
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img, err := generateQR(url, nil, size)
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if err != nil {
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t.Fatal(err)
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}
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probe, err := qrcode.New(url, qrcode.High)
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if err != nil {
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t.Fatal(err)
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}
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probe.DisableBorder = true
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modules := len(probe.Bitmap())
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perModule := size / modules
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want := modules * perModule
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if got := img.Bounds().Dx(); got != want {
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t.Fatalf("size %d: got width %d, want %d (%d modules x %dpx)", size, got, want, modules, perModule)
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}
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if got := img.Bounds().Dy(); got != want {
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t.Fatalf("size %d: got height %d, want %d", size, got, want)
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}
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// 至少用掉目标尺寸的 80%，防止静默区/留白再次吃掉模块像素
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if float64(want) < 0.8*float64(size) {
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t.Fatalf("size %d: symbol only %dpx, wastes %.0f%% of the target", size, want, 100*(1-float64(want)/float64(size)))
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}
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// 逐行扫描：所有黑白游程都必须是模块宽度的整数倍
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for _, y := range []int{want / 2, want / 3} {
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runLen := 0
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for x := 0; x < want; x++ {
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r, _, _, _ := img.At(x, y).RGBA()
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black := r < 0x8000
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if x == 0 {
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runLen = 1
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continue
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}
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prevR, _, _, _ := img.At(x-1, y).RGBA()
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if (prevR < 0x8000) != black {
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if runLen%perModule != 0 {
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t.Fatalf("size %d: run of %dpx at x=%d is not a multiple of module %d",
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size, runLen, x-runLen, perModule)
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}
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runLen = 1
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continue
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}
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runLen++
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}
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if runLen%perModule != 0 {
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t.Fatalf("size %d: trailing run %dpx not a multiple of %d", size, runLen, perModule)
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}
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}
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}
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}
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// 视觉自检：TEST_PREVIEW=1 时把链接区渲成 PNG，人工确认断行与对齐。
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func TestShareCardLinkPreview(t *testing.T) {
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if os.Getenv("TEST_PREVIEW") == "" {
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t.Skip("set TEST_PREVIEW=1 to write preview images")
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}
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requireFont(t)
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outDir := os.Getenv("TEST_PREVIEW_DIR")
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if outDir == "" {
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outDir = filepath.Join("..", "..", "outputs", "sharecard-preview")
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}
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if err := os.MkdirAll(outDir, 0o755); err != nil {
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t.Fatal(err)
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}
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cases := map[string]string{
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"short": "box.shiroko.one/_/tamakyi",
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"dev": "box-dev-api.337845818.best/_/tamakyi",
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"long": "ask.some-quite-long-domain-name.example.com/_/tamakyi",
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"verylong": "questions.tamabox-community.example.org/anon/box/_/a-rather-long-handle-name",
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}
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for name, display := range cases {
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canvas := image.NewRGBA(image.Rect(0, 0, QRCardW, QRCardH))
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draw.Draw(canvas, canvas.Bounds(), &image.Uniform{color.NRGBA{246, 246, 246, 255}}, image.Point{}, draw.Src)
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drawRoundedRect(canvas, canvas.Bounds(), ColorWhite, 18)
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fctx := freetype.NewContext()
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fctx.SetFont(requireFont(t))
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fctx.SetDPI(72)
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lines, size := layoutLink(display)
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const qrToHintGap, hintLineHeight, hintToSepGap, sepHeight, sepToLinkGap, linkLineHeight = 24, 17, 20, 1, 20, 16
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qr, err := generateQR("https://"+display, nil, QRCodeSize)
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if err != nil {
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t.Fatal(err)
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}
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qrSize := qr.Bounds().Dx()
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total := qrSize + qrToHintGap + hintLineHeight + hintToSepGap + sepHeight + sepToLinkGap + linkLineHeight*len(lines)
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startY := (QRCardH - total) / 2
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draw.Draw(canvas, image.Rect((QRCardW-qrSize)/2, startY, (QRCardW+qrSize)/2, startY+qrSize), qr, image.Point{}, draw.Over)
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hintY := startY + qrSize + qrToHintGap + hintLineHeight
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drawTextCentered(canvas, "扫码向我匿名提问", QRCardW/2, hintY, FontSizeQRHint, ColorHintGray, fctx)
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sepY := hintY + hintToSepGap
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drawLine(canvas, QRCardW/2-90, sepY, QRCardW/2+90, sepY, color.NRGBA{200, 200, 200, 180})
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linkY := sepY + sepToLinkGap + linkLineHeight
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for i, line := range lines {
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drawTextCentered(canvas, line, QRCardW/2, linkY+i*linkLineHeight, size, ColorDarkText, fctx)
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}
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f, err := os.Create(filepath.Join(outDir, name+".png"))
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if err != nil {
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t.Fatal(err)
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}
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if err := png.Encode(f, canvas); err != nil {
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t.Fatal(err)
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}
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f.Close()
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}
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}
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