Add build support for webp images.

SConstruct

@@ -390,8 +390,7 @@ if env["prereqs"]:
     have_client_prereqs = have_client_prereqs & conf.CheckLib("vorbisfile") & conf.CheckOgg()
     have_client_prereqs = have_client_prereqs & conf.CheckPNG()
     have_client_prereqs = have_client_prereqs & conf.CheckJPG()
-#    have_client_prereqs = have_client_prereqs & conf.CheckOpenGL()
-#    have_client_prereqs = have_client_prereqs & conf.CheckGLEW()
+    have_client_prereqs = have_client_prereqs & conf.CheckWebP()
     have_client_prereqs = have_client_prereqs & conf.CheckCairo(min_version = "1.10")
     have_client_prereqs = have_client_prereqs & conf.CheckPango("cairo", require_version = "1.22.0")
     have_client_prereqs = have_client_prereqs & conf.CheckPKG("fontconfig")

data/game_config.cfg

@@ -62,7 +62,7 @@
 
     [images]
         game_title="maps/titlescreen.png"
-        game_title_background="maps/background.jpg"
+        game_title_background="maps/background.webp"
         game_logo="misc/logo.png"
         game_logo_background="misc/logo-bg.png"
 

scons/sdl.py

@@ -191,6 +191,44 @@ def CheckPNG(context):
             context.Result("no")
             return False
 
+def CheckWebP(context):
+    test_program = '''
+    #include <SDL_image.h>
+    #include <stdlib.h>
+
+    int main(int argc, char **argv)
+    {
+            SDL_RWops *src;
+            char *testimage = "$TESTFILE";
+
+            src = SDL_RWFromFile(testimage, "rb");
+            if (src == NULL) {
+                    exit(2);
+            }
+            exit(!IMG_isWEBP(src));
+    }
+\n
+'''
+    nodepath = File("data/core/images/maps/background.webp").rfile().abspath.replace("\\", "\\\\")
+    test_program1 = context.env.Clone(TESTFILE = nodepath).subst(test_program)
+    context.Message("Checking for WebP support in SDL... ")
+    if context.env["host"]:
+        context.Result("n/a (cross-compile)")
+        return True
+    (result, output) = context.TryRun(test_program1, ".c")
+    if result:
+        context.Result("yes")
+        return True
+    else:
+        test_program2 = context.env.Clone(TESTFILE = "data/core/images/maps/background.webp").subst(test_program)
+        (result, output) = context.TryRun(test_program2, ".c")
+        if result:
+            context.Result("yes")
+            return True
+        else:
+            context.Result("no")
+            return False
+
 def CheckJPG(context):
     test_program = '''
     #include <SDL_image.h>
@@ -209,7 +247,7 @@ def CheckJPG(context):
     }
 \n
 '''
-    nodepath = File("data/core/images/maps/background.jpg").rfile().abspath.replace("\\", "\\\\")
+    nodepath = File("attic/northlands.jpg").rfile().abspath.replace("\\", "\\\\")
     test_program1 = context.env.Clone(TESTFILE = nodepath).subst(test_program)
     context.Message("Checking for JPG support in SDL... ")
     if context.env["host"]:
@@ -220,7 +258,7 @@ def CheckJPG(context):
         context.Result("yes")
         return True
     else:
-        test_program2 = context.env.Clone(TESTFILE = "data/core/images/maps/background.jpg").subst(test_program)
+        test_program2 = context.env.Clone(TESTFILE = "attic/northlands.jpg").subst(test_program)
         (result, output) = context.TryRun(test_program2, ".c")
         if result:
             context.Result("yes")
@@ -232,4 +270,5 @@ def CheckJPG(context):
 config_checks = { 'CheckSDL' : CheckSDL,
                   'CheckOgg' : CheckOgg,
                   'CheckPNG' : CheckPNG,
-                  'CheckJPG' : CheckJPG }
+                  'CheckJPG' : CheckJPG,
+                  'CheckWebP' : CheckWebP }

utils/CI/check_utf8.sh

@@ -8,7 +8,7 @@ command -v isutf8 >/dev/null || { echo "Install 'isutf8' from moreutils to use t
 exit_code=0
 
 find src/ -type f -not -path "src/modules/*" -print0 | xargs -0 isutf8 -- || exit_code=1
-for ex in png ogg jpg wav gif xcf bin; do args+=(! -name "*.$ex"); done
+for ex in png ogg jpg wav gif xcf bin webp; do args+=(! -name "*.$ex"); done
 find data/ -type f "${args[@]}" ! -name "test_cve_2018_1999023_2.cfg" -print0 | xargs -0 isutf8 -- || exit_code=1
 find po/ -type f -print0 | xargs -0 isutf8 -- || exit_code=1
 

utils/dockerbuilds/make_steam_image

@@ -2,7 +2,7 @@
 
 VALVEFILE=com.valvesoftware.SteamRuntime.Sdk-amd64,i386-scout-sysroot.Dockerfile
 VALVETAR=com.valvesoftware.SteamRuntime.Sdk-amd64,i386-scout-sysroot.tar.gz
-VALVE_SNAPSHOT=0.20211207.0
+VALVE_SNAPSHOT=0.20220119.0
 
 DOCKERBASEIMAGE=steamrt_scout_amd64
 DOCKERLOCALIMAGE=wesnoth/wesnoth:steamrt-master

vcpkg.json

@@ -6,8 +6,9 @@
     "sdl2",
     {
       "name": "sdl2-image",
-      "features": [ "libjpeg-turbo" ]
+      "features": [ "libjpeg-turbo", "libwebp" ]
     },
+    "libwebp",
     {
       "name": "sdl2-mixer",
       "features": [ "libvorbis", "dynamic-load" ]