Pdf source

examples/pdfslides.yaml

@@ -0,0 +1,86 @@
+sources:
+  background:
+    type: image
+    path: images/background.png
+  slides:
+    tag: SLD
+    type: pdf
+    path: images/fazantix.pdf
+    width: 1920
+    height: 1080
+    makescene: true
+  camera:
+    tag: CAM
+    type: image
+    path: images/testsrc1.png
+    makescene: true
+
+
+scenes:
+  side-by-side:
+    layers:
+      - source: background
+        transform:
+          x: 0
+          y: 0
+          scale: 1
+          opacity: 1
+      - source: slides
+        transform:
+          cx: 0.25
+          cy: 0.5
+          left: 0.01
+          opacity: 1
+      - source: camera
+        transform:
+          cx: 0.75
+          cy: 0.5
+          right: 0.01
+          opacity: 1
+  default:
+    tag: "dflt"
+    layers:
+      - source: background
+        transform:
+          x: 0
+          y: 0
+          scale: 1
+          opacity: 1
+      - source: slides
+        transform:
+          left: -0.04
+          top: -0.04
+          scale: 0.79
+          opacity: 1
+        warp:
+          opacity: 0
+          cx: 0.5
+          cy: 0.5
+          scale: 0.1
+      - source: camera
+        transform:
+          right: -0.04
+          bottom: -0.1
+          scale: 0.25
+          opacity: 1
+        warp:
+          opacity: 1
+          scale: 0.001
+          right: -0.04
+          bottom: -0.1
+
+sinks:
+  projector:
+    type: window
+    frames:
+      width: 1280
+      height: 720
+    default_scene: default
+    transition_time_ms: 1500
+
+api:
+  bind: ':8000'
+  enable_profiler: true
+
+fallback_colour: '#ebac54'
+bg_colour: '#54aceb'

go.mod

@@ -3,6 +3,7 @@ module github.com/fosdem/fazantix
 go 1.24.4
 
 require (
+	github.com/gen2brain/go-fitz v1.24.15
 	github.com/go-gl/gl v0.0.0-20231021071112-07e5d0ea2e71
 	github.com/go-gl/glfw/v3.3/glfw v0.0.0-20250301202403-da16c1255728
 	github.com/go-gl/mathgl v1.2.0
@@ -13,19 +14,22 @@ require (
 	github.com/prometheus/client_golang v1.23.0
 	github.com/swaggo/http-swagger v1.3.4
 	github.com/swaggo/swag v1.16.6
-	golang.org/x/sys v0.33.0
+	golang.org/x/image v0.34.0
+	golang.org/x/sys v0.38.0
 )
 
 require (
 	github.com/KyleBanks/depth v1.2.1 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d // indirect
+	github.com/ebitengine/purego v0.8.4 // indirect
 	github.com/go-openapi/jsonpointer v0.19.5 // indirect
 	github.com/go-openapi/jsonreference v0.20.0 // indirect
 	github.com/go-openapi/spec v0.20.6 // indirect
 	github.com/go-openapi/swag v0.19.15 // indirect
 	github.com/josharian/intern v1.0.0 // indirect
+	github.com/jupiterrider/ffi v0.5.0 // indirect
 	github.com/mailru/easyjson v0.7.6 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
 	github.com/prometheus/client_model v0.6.2 // indirect
@@ -35,10 +39,11 @@ require (
 	github.com/shurcooL/sanitized_anchor_name v1.0.0 // indirect
 	github.com/swaggo/files v0.0.0-20220610200504-28940afbdbfe // indirect
 	github.com/urfave/cli/v2 v2.3.0 // indirect
-	golang.org/x/mod v0.17.0 // indirect
-	golang.org/x/net v0.40.0 // indirect
-	golang.org/x/text v0.25.0 // indirect
-	golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d // indirect
+	golang.org/x/mod v0.30.0 // indirect
+	golang.org/x/net v0.47.0 // indirect
+	golang.org/x/sync v0.19.0 // indirect
+	golang.org/x/text v0.32.0 // indirect
+	golang.org/x/tools v0.39.0 // indirect
 	google.golang.org/protobuf v1.36.6 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
 	sigs.k8s.io/yaml v1.3.0 // indirect

go.sum

@@ -11,6 +11,10 @@ github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ3
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/ebitengine/purego v0.8.4 h1:CF7LEKg5FFOsASUj0+QwaXf8Ht6TlFxg09+S9wz0omw=
+github.com/ebitengine/purego v0.8.4/go.mod h1:iIjxzd6CiRiOG0UyXP+V1+jWqUXVjPKLAI0mRfJZTmQ=
+github.com/gen2brain/go-fitz v1.24.15 h1:sJNB1MOWkqnzzENPHggFpgxTwW0+S5WF/rM5wUBpJWo=
+github.com/gen2brain/go-fitz v1.24.15/go.mod h1:SftkiVbTHqF141DuiLwBBM65zP7ig6AVDQpf2WlHamo=
 github.com/go-gl/gl v0.0.0-20231021071112-07e5d0ea2e71 h1:5BVwOaUSBTlVZowGO6VZGw2H/zl9nrd3eCZfYV+NfQA=
 github.com/go-gl/gl v0.0.0-20231021071112-07e5d0ea2e71/go.mod h1:9YTyiznxEY1fVinfM7RvRcjRHbw2xLBJ3AAGIT0I4Nw=
 github.com/go-gl/glfw/v3.3/glfw v0.0.0-20250301202403-da16c1255728 h1:RkGhqHxEVAvPM0/R+8g7XRwQnHatO0KAuVcwHo8q9W8=
@@ -37,6 +41,8 @@ github.com/jhenstridge/go-inotify v0.0.0-20221229091821-b0d1463614ad h1:/2F/Btqi
 github.com/jhenstridge/go-inotify v0.0.0-20221229091821-b0d1463614ad/go.mod h1:VwIUlT/4zR9maLnQrENDJkTxb971f5N4sXUTVvSa2WU=
 github.com/josharian/intern v1.0.0 h1:vlS4z54oSdjm0bgjRigI+G1HpF+tI+9rE5LLzOg8HmY=
 github.com/josharian/intern v1.0.0/go.mod h1:5DoeVV0s6jJacbCEi61lwdGj/aVlrQvzHFFd8Hwg//Y=
+github.com/jupiterrider/ffi v0.5.0 h1:j2nSgpabbV1JOwgP4Kn449sJUHq3cVLAZVBoOYn44V8=
+github.com/jupiterrider/ffi v0.5.0/go.mod h1:x7xdNKo8h0AmLuXfswDUBxUsd2OqUP4ekC8sCnsmbvo=
 github.com/klauspost/compress v1.18.0 h1:c/Cqfb0r+Yi+JtIEq73FWXVkRonBlf0CRNYc8Zttxdo=
 github.com/klauspost/compress v1.18.0/go.mod h1:2Pp+KzxcywXVXMr50+X0Q/Lsb43OQHYWRCY2AiWywWQ=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
@@ -88,24 +94,26 @@ github.com/urfave/cli/v2 v2.3.0 h1:qph92Y649prgesehzOrQjdWyxFOp/QVM+6imKHad91M=
 github.com/urfave/cli/v2 v2.3.0/go.mod h1:LJmUH05zAU44vOAcrfzZQKsZbVcdbOG8rtL3/XcUArI=
 go.uber.org/goleak v1.3.0 h1:2K3zAYmnTNqV73imy9J1T3WC+gmCePx2hEGkimedGto=
 go.uber.org/goleak v1.3.0/go.mod h1:CoHD4mav9JJNrW/WLlf7HGZPjdw8EucARQHekz1X6bE=
-golang.org/x/mod v0.17.0 h1:zY54UmvipHiNd+pm+m0x9KhZ9hl1/7QNMyxXbc6ICqA=
-golang.org/x/mod v0.17.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
+golang.org/x/image v0.34.0 h1:33gCkyw9hmwbZJeZkct8XyR11yH889EQt/QH4VmXMn8=
+golang.org/x/image v0.34.0/go.mod h1:2RNFBZRB+vnwwFil8GkMdRvrJOFd1AzdZI6vOY+eJVU=
+golang.org/x/mod v0.30.0 h1:fDEXFVZ/fmCKProc/yAXXUijritrDzahmwwefnjoPFk=
+golang.org/x/mod v0.30.0/go.mod h1:lAsf5O2EvJeSFMiBxXDki7sCgAxEUcZHXoXMKT4GJKc=
 golang.org/x/net v0.0.0-20210805182204-aaa1db679c0d/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
-golang.org/x/net v0.40.0 h1:79Xs7wF06Gbdcg4kdCCIQArK11Z1hr5POQ6+fIYHNuY=
-golang.org/x/net v0.40.0/go.mod h1:y0hY0exeL2Pku80/zKK7tpntoX23cqL3Oa6njdgRtds=
-golang.org/x/sync v0.14.0 h1:woo0S4Yywslg6hp4eUFjTVOyKt0RookbpAHG4c1HmhQ=
-golang.org/x/sync v0.14.0/go.mod h1:1dzgHSNfp02xaA81J2MS99Qcpr2w7fw1gpm99rleRqA=
+golang.org/x/net v0.47.0 h1:Mx+4dIFzqraBXUugkia1OOvlD6LemFo1ALMHjrXDOhY=
+golang.org/x/net v0.47.0/go.mod h1:/jNxtkgq5yWUGYkaZGqo27cfGZ1c5Nen03aYrrKpVRU=
+golang.org/x/sync v0.19.0 h1:vV+1eWNmZ5geRlYjzm2adRgW2/mcpevXNg50YZtPCE4=
+golang.org/x/sync v0.19.0/go.mod h1:9KTHXmSnoGruLpwFjVSX0lNNA75CykiMECbovNTZqGI=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.33.0 h1:q3i8TbbEz+JRD9ywIRlyRAQbM0qF7hu24q3teo2hbuw=
-golang.org/x/sys v0.33.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
+golang.org/x/sys v0.38.0 h1:3yZWxaJjBmCWXqhN1qh02AkOnCQ1poK6oF+a7xWL6Gc=
+golang.org/x/sys v0.38.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/text v0.25.0 h1:qVyWApTSYLk/drJRO5mDlNYskwQznZmkpV2c8q9zls4=
-golang.org/x/text v0.25.0/go.mod h1:WEdwpYrmk1qmdHvhkSTNPm3app7v4rsT8F2UD6+VHIA=
+golang.org/x/text v0.32.0 h1:ZD01bjUt1FQ9WJ0ClOL5vxgxOI/sVCNgX1YtKwcY0mU=
+golang.org/x/text v0.32.0/go.mod h1:o/rUWzghvpD5TXrTIBuJU77MTaN0ljMWE47kxGJQ7jY=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
-golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d h1:vU5i/LfpvrRCpgM/VPfJLg5KjxD3E+hfT1SH+d9zLwg=
-golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d/go.mod h1:aiJjzUbINMkxbQROHiO6hDPo2LHcIPhhQsa9DLh0yGk=
+golang.org/x/tools v0.39.0 h1:ik4ho21kwuQln40uelmciQPp9SipgNDdrafrYA4TmQQ=
+golang.org/x/tools v0.39.0/go.mod h1:JnefbkDPyD8UU2kI5fuf8ZX4/yUeh9W877ZeBONxUqQ=
 google.golang.org/protobuf v1.36.6 h1:z1NpPI8ku2WgiWnf+t9wTPsn6eP1L7ksHUlkfLvd9xY=
 google.golang.org/protobuf v1.36.6/go.mod h1:jduwjTPXsFjZGTmRluh+L6NjiWu7pchiJ2/5YcXBHnY=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=

lib/api/api.go

@@ -93,6 +93,7 @@ func (a *Api) Serve() error {
 	a.mux.HandleFunc("/api/media/source/{source}", a.handleMediaSource)
 	a.mux.HandleFunc("/api/media/sink/{sink}", a.handleMediaSource)
 	a.mux.HandleFunc("/api/media/source/{source}/{format}", a.handleMediaSource)
+	a.mux.HandleFunc("/api/slide/source/{source}/{action}/{num}", a.handleSlidePage)
 	a.mux.Handle("/swagger/", httpSwagger.Handler())
 	a.mux.Handle("/metrics", metrics.Handler())
 	a.mux.Handle("/", http.FileServer(http.FS(contentFS)))

lib/api/media.go

@@ -11,6 +11,7 @@ import (
 	"github.com/fosdem/fazantix/lib/encdec"
 	"github.com/fosdem/fazantix/lib/layer"
 	"github.com/fosdem/fazantix/lib/source/imgsource"
+	"github.com/fosdem/fazantix/lib/source/pdfsource"
 )
 
 type FrameForwarderObject interface {
@@ -124,25 +125,32 @@ func (a *Api) handleMediaSource(w http.ResponseWriter, req *http.Request) {
 		return
 	}
 
-	imgSource, ok := source.(*imgsource.ImgSource)
-	if !ok {
-		http.Error(w, "not a valid image source", http.StatusBadRequest)
-		return
-	}
-
 	if req.Method == "PUT" {
-		newImage, ftype, err := image.Decode(req.Body)
-		if err != nil {
-			http.Error(w, fmt.Sprintf("not a valid image: %s", err), http.StatusBadRequest)
+		switch src := source.(type) {
+		case *imgsource.ImgSource:
+			newImage, ftype, err := image.Decode(req.Body)
+			if err != nil {
+				http.Error(w, fmt.Sprintf("not a valid image: %s", err), http.StatusBadRequest)
+				return
+			}
+			log.Printf("Image source %s was updated with new %s image (%dx%d)\n", sourceName, ftype, newImage.Bounds().Dx(), newImage.Bounds().Dy())
+			err = src.SetImage(newImage)
+			if err != nil {
+				http.Error(w, fmt.Sprintf("could not update image: %s", err), http.StatusBadRequest)
+				return
+			}
 			return
-		}
-		log.Printf("Image source %s was updated with new %s image (%dx%d)\n", sourceName, ftype, newImage.Bounds().Dx(), newImage.Bounds().Dy())
-		err = imgSource.SetImage(newImage)
-		if err != nil {
-			http.Error(w, fmt.Sprintf("could not update image: %s", err), http.StatusBadRequest)
+		case *pdfsource.PdfSource:
+			err := src.SetDocument(req.Body)
+			if err != nil {
+				http.Error(w, fmt.Sprintf("could not update document: %s", err), http.StatusBadRequest)
+				return
+			}
+			return
+		default:
+			http.Error(w, "Unsupported source type", http.StatusBadRequest)
 			return
 		}
-		return
 	}
 
 	http.Error(w, "Invalid method, only GET and PUT supported", http.StatusMethodNotAllowed)

lib/api/slides.go

@@ -0,0 +1,72 @@
+package api
+
+import (
+	"fmt"
+	"net/http"
+	"strconv"
+
+	"github.com/fosdem/fazantix/lib/source/pdfsource"
+)
+
+// @Summary	fetch a frame from a source or sink
+// @Router		/api/slides/source/{name}/set-slide/{num} [post]
+// @Router		/api/slides/source/{name}/move-slide/{num} [post]
+// @Tags		media
+// @Param		name	path	string	true	"Name of the source to control the slides of"
+// @Param		num		path	int		true	"The slide number to switch to"
+// @Success	200
+// @Failure	400	{string}	string	"The {name} parameter was not specified"
+// @Failure	400	{string}	string	"The {num} parameter was out of range"
+// @Failure	404	{string}	string	"The specified source does not exist in the configuration"
+func (a *Api) handleSlidePage(w http.ResponseWriter, req *http.Request) {
+	sourceName := req.PathValue("source")
+	pageStr := req.PathValue("num")
+	actionStr := req.PathValue("action")
+	if sourceName == "" {
+		http.Error(w, "Missing source name", http.StatusBadRequest)
+		return
+	}
+	if pageStr == "" {
+		http.Error(w, "Missing page number", http.StatusBadRequest)
+		return
+	}
+	if actionStr != "set-slide" && actionStr != "move-slide" {
+		http.Error(w, "Invalid action", http.StatusBadRequest)
+		return
+	}
+	page, err := strconv.ParseInt(pageStr, 10, 32)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusBadRequest)
+		return
+	}
+
+	var source FrameForwarderObject
+	source = a.theatre.SourceByName(sourceName)
+	if source == nil {
+		http.Error(w, "Source does not exist", http.StatusNotFound)
+		return
+	}
+
+	if req.Method != "POST" {
+		http.Error(w, "Unsupported method", http.StatusMethodNotAllowed)
+		return
+	}
+
+	relative := false
+	if actionStr == "move-slide" {
+		relative = true
+	}
+
+	switch src := source.(type) {
+	case *pdfsource.PdfSource:
+		err = src.SetPage(int(page), relative)
+		if err != nil {
+			http.Error(w, fmt.Sprintf("could not set slide: %s", err), http.StatusBadRequest)
+			return
+		}
+		return
+	default:
+		http.Error(w, "Unsupported source type", http.StatusBadRequest)
+		return
+	}
+}

lib/config/config.go

@@ -13,6 +13,7 @@ import (
 
 var EnablePlutobook = true
 var EnableOmt = true
+var EnableMupdf = true
 
 type Config struct {
 	Sources        map[string]*SourceCfg
@@ -212,6 +213,12 @@ type HtmlSourceCfg struct {
 	Height int
 }
 
+type PdfSourceCfg struct {
+	Path   CfgPath
+	Width  int
+	Height int
+}
+
 type V4LSourceCfg struct {
 	encdec.FrameCfg    `yaml:"frames"`
 	Path               string
@@ -247,6 +254,10 @@ func (s *SourceCfg) UnmarshalYAML(b []byte) error {
 		cfg := OmtSourceCfg{}
 		s.Cfg = &cfg
 		return yaml.Unmarshal(b, &cfg)
+	case "pdf":
+		cfg := PdfSourceCfg{}
+		s.Cfg = &cfg
+		return yaml.Unmarshal(b, &cfg)
 	default:
 		return fmt.Errorf("unknown source type: %s", s.Type)
 	}
@@ -399,3 +410,13 @@ func (s *V4LSourceCfg) Validate() error {
 	}
 	return nil
 }
+
+func (s *PdfSourceCfg) Validate() error {
+	if !EnableMupdf {
+		return fmt.Errorf("MuPDF support is not compiled in")
+	}
+	if s.Width == 0 && s.Height == 0 {
+		return fmt.Errorf("PDF rendering size must be specified")
+	}
+	return nil
+}