Added build flag to switch to Allegro backend.

Added logs that print which backend is used.

cmd/tins2020/tins2020.go

@@ -12,9 +12,6 @@ import (
 	"opslag.de/schobers/zntg/play"
 	"opslag.de/schobers/zntg/ui"
 
-	_ "opslag.de/schobers/zntg/sdlui" // rendering backend
-	// _ "opslag.de/schobers/zntg/allg5ui" // rendering backend
-
 	rice "github.com/GeertJohan/go.rice"
 	"github.com/veandco/go-sdl2/sdl"
 	"opslag.de/schobers/tins2020"

cmd/tins2020/tins2020_allegro.go

@@ -0,0 +1,13 @@
+// +build allegro
+
+package main
+
+import (
+	"log"
+
+	_ "opslag.de/schobers/zntg/allg5ui" // rendering backend
+)
+
+func init() {
+	log.Println("Using Allegro5 rendering backend")
+}

cmd/tins2020/tins2020_sdl.go

@@ -0,0 +1,13 @@
+// +build !allegro
+
+package main
+
+import (
+	"log"
+
+	_ "opslag.de/schobers/zntg/sdlui" // SDL rendering backend
+)
+
+func init() {
+	log.Println("Using SDL rendering backend")
+}