Method GenerateMap

raid/mapgenerator.go:102–144

(updaterState *UpdaterState, title string, transparent bool)

}

func (g *MapGenerator) GenerateMap(updaterState *UpdaterState, title string, transparent bool) error {
	stateAlerts := map[int]bool{}
	for _, state := range updaterState.States {
		stateAlerts[state.ID] = state.Alert
	}

	mapStr := bytes.NewBuffer(nil)
	if err := g.mapTemplate.Execute(mapStr, map[string]interface{}{"alerts": stateAlerts}); err != nil {
		return fmt.Errorf("mapgenerator: execute map template: %w", err)
	}

	svg, _ := oksvg.ReadIconStream(mapStr)
	svg.SetTarget(0, 0, MapWidth, MapHeight)
	rect := image.Rect(0, 0, MapWidth, MapHeight)
	rgba := image.NewRGBA(rect)

	if !transparent {
		draw.Draw(rgba, rect, image.White, image.Point{}, draw.Src)
	}

	svg.Draw(rasterx.NewDasher(MapWidth, MapHeight, rasterx.NewScannerGV(MapWidth, MapHeight, rgba, rgba.Bounds())), 1)

	if len(title) > 0 {
		g.fontContext.SetClip(rgba.Bounds())
		g.fontContext.SetDst(rgba)

		if _, err := g.fontContext.DrawString(title, freetype.Pt(50, 500)); err != nil {
			return fmt.Errorf("mapgenerator: draw text: %w", err)
		}
	}

	out := bytes.NewBuffer(nil)
	if err := png.Encode(out, rgba); err != nil {
		return fmt.Errorf("mapgenerator: encode png map: %w", err)
	}

	g.MapData.ContentType = "image/png"
	g.MapData.Bytes = out.Bytes()

	log.Infof("mapgenerator: generate map complete, size = %d B", len(g.MapData.Bytes))

	return nil
}