feat: add new card style (#7)

Author: Jiang-Red

rank.go

@@ -0,0 +1,141 @@
+package rendercard
+
+import (
+	"image"
+	"image/color"
+	"strconv"
+	"sync"
+
+	"github.com/FloatTech/gg"
+)
+
+// RankInfo ...
+type RankInfo struct {
+	Avatar         image.Image
+	TopLeftText    string
+	BottomLeftText string
+	RightText      string
+}
+
+// DrawRankingCard ...
+func DrawRankingCard(fontdata []byte, title string, rankinfo []*RankInfo) (img image.Image, err error) {
+	line := len(rankinfo)
+	const w = 672
+	h := 64 + (80+14)*line + 20 - 14
+	canvas := gg.NewContext(w, h)
+	canvas.SetRGBA255(255, 255, 255, 255)
+	canvas.Clear()
+
+	ac := gg.NewLinearGradient(16, float64(h)/2, w-16, float64(h)/2)
+	ac.AddColorStop(0, color.NRGBA{255, 255, 255, 95})
+	ac.AddColorStop(0.167, color.NRGBA{255, 255, 255, 127})
+	ac.AddColorStop(0.334, color.NRGBA{255, 255, 255, 159})
+	ac.AddColorStop(0.5, color.NRGBA{255, 255, 255, 255})
+	ac.AddColorStop(1, color.NRGBA{255, 255, 255, 255})
+
+	cardh, cardw := 80, 640
+	cardspac := 14
+	hspac, wspac := 64.0, 16.0
+	r := 16.0
+
+	wg := &sync.WaitGroup{}
+	wg.Add(line)
+	cardimgs := make([]image.Image, line)
+	for i := 0; i < line; i++ {
+		go func(i int) {
+			defer wg.Done()
+			card := gg.NewContext(w, cardh)
+
+			card.NewSubPath()
+			card.MoveTo(wspac+float64(cardh)/2, 0)
+
+			card.LineTo(wspac+float64(cardw)-r, 0)
+			card.DrawArc(wspac+float64(cardw)-r, r, r, gg.Radians(-90), gg.Radians(0))
+			card.LineTo(wspac+float64(cardw), float64(cardh)-r)
+			card.DrawArc(wspac+float64(cardw)-r, float64(cardh)-r, r, gg.Radians(0), gg.Radians(90))
+			card.LineTo(wspac+float64(cardh)/2, float64(cardh))
+
+			card.DrawArc(wspac+float64(cardh)/2, float64(cardh)/2, float64(cardh)/2, gg.Radians(90), gg.Radians(270))
+			card.ClosePath()
+
+			card.ClipPreserve()
+
+			avatar := rankinfo[i].Avatar
+
+			card.ScaleAbout(float64(cardw)/2/float64(avatar.Bounds().Dx()), float64(cardw)/2/float64(avatar.Bounds().Dy()), wspac, float64(cardh)/2)
+
+			card.DrawImageAnchored(avatar, 0, cardh/2, 0, 0.5)
+			card.Identity()
+			card.ResetClip()
+
+			card.SetFillStyle(ac)
+			card.FillPreserve()
+
+			card.SetRGBA255(0, 0, 0, 255)
+			card.Stroke()
+			card.DrawLine(wspac+float64(cardh)/2, float64(cardh), wspac+float64(cardw)-r, float64(cardh))
+			card.Stroke()
+
+			card.DrawCircle(wspac+10+30, float64(cardh)/2, 30)
+			card.ClipPreserve()
+			card.ScaleAbout(60.0/float64(avatar.Bounds().Dx()), 60.0/float64(avatar.Bounds().Dy()), wspac+10+30, float64(cardh)/2)
+			card.DrawImageAnchored(avatar, int(wspac)+10+30, cardh/2, 0.5, 0.5)
+			card.Identity()
+
+			card.ResetClip()
+			card.SetRGBA255(0, 0, 0, 127)
+			card.Stroke()
+
+			card.SetRGB255(RandJPColor())
+			card.DrawCircle(wspac+float64(cardw-8-25), float64(cardh)/2, 25)
+			card.Fill()
+			cardimgs[i] = card.Image()
+		}(i)
+	}
+
+	canvas.SetRGBA255(0, 0, 0, 255)
+	err = canvas.ParseFontFace(fontdata, 32)
+	if err != nil {
+		return
+	}
+	canvas.DrawStringAnchored(title, w/2, 64/2, 0.5, 0.5)
+
+	err = canvas.ParseFontFace(fontdata, 22)
+	if err != nil {
+		return
+	}
+	wg.Wait()
+	for i := 0; i < line; i++ {
+		canvas.DrawImageAnchored(cardimgs[i], w/2, int(hspac)+((cardh+cardspac)*i), 0.5, 0)
+		canvas.DrawStringAnchored(rankinfo[i].TopLeftText, wspac+10+60+10, hspac+float64((cardspac+cardh)*i+cardh*3/8), 0, 0.5)
+	}
+
+	canvas.SetRGBA255(63, 63, 63, 255)
+	err = canvas.ParseFontFace(fontdata, 12)
+	if err != nil {
+		return
+	}
+	for i := 0; i < line; i++ {
+		canvas.DrawStringAnchored(rankinfo[i].BottomLeftText, wspac+10+60+10, hspac+float64((cardspac+cardh)*i+cardh*5/8), 0, 0.5)
+	}
+	canvas.SetRGBA255(0, 0, 0, 255)
+	err = canvas.ParseFontFace(fontdata, 20)
+	if err != nil {
+		return
+	}
+	for i := 0; i < line; i++ {
+		canvas.DrawStringAnchored(rankinfo[i].RightText, w-wspac-8-50-8, hspac+float64((cardspac+cardh)*i+cardh/2), 1, 0.5)
+	}
+
+	canvas.SetRGBA255(255, 255, 255, 255)
+	err = canvas.ParseFontFace(fontdata, 28)
+	if err != nil {
+		return
+	}
+	for i := 0; i < line; i++ {
+		canvas.DrawStringAnchored(strconv.Itoa(i+1), w-wspac-8-25, hspac+float64((cardspac+cardh)*i+cardh/2), 0.5, 0.5)
+	}
+
+	img = canvas.Image()
+	return
+}