Merge pull request #21 from NHDaly/sdl2_example

Add examples for building a *fully self-contained* SDL2 app.

Author: NHDaly

examples/sdl.jl

@@ -0,0 +1,88 @@
+# examples/sdl.jl
+#   This is an example of an Application that uses a package containing binary
+#   dependencies, in this case SimpleDirectMediaLayer.jl. The binary
+#   dependencies need to be provided to ApplicationBuilder at build-time. Please
+#   see the associated build file here:
+# test/build_examples/sdl.jl
+# https://github.com/NHDaly/ApplicationBuilder.jl/tree/master/test/build_examples/sdl.jl
+
+using ApplicationBuilder
+
+using SimpleDirectMediaLayer
+SDL2 = SimpleDirectMediaLayer
+
+fontFile = joinpath(Pkg.dir("SimpleDirectMediaLayer"),
+                        "assets","fonts","FiraCode","ttf","FiraCode-Regular.ttf")
+
+# Override SDL libs + assets locations if this script is being compiled for mac .app builds
+if get(ENV, "COMPILING_APPLE_BUNDLE", "false") == "true"
+    eval(SDL2, :(libSDL2 = "libSDL2.dylib"))
+    eval(SDL2, :(libSDL2_ttf = "libSDL2_ttf.dylib"))
+    eval(SDL2, :(libSDL2_mixer = "libSDL2_mixer.dylib"))
+
+    fontFile = basename(fontFile)
+end
+
+function helloFromSDL()
+
+    SDL2.init()
+
+    win = SDL2.CreateWindow("Hello World!", Int32(100), Int32(100), Int32(300), Int32(400),
+    UInt32(SDL2.WINDOW_SHOWN))
+    renderer = SDL2.CreateRenderer(win, Int32(-1),
+                UInt32(SDL2.RENDERER_ACCELERATED | SDL2.RENDERER_PRESENTVSYNC))
+
+    running = true
+    while running
+        # Check for quitting
+        e = SDL2.event()
+        if isa(e, SDL2.QuitEvent)
+            running = false
+        end
+
+        x,y = Int[1], Int[1]
+        SDL2.PumpEvents()
+        SDL2.GetMouseState(pointer(x), pointer(y))
+
+        # Set background render color
+        SDL2.SetRenderDrawColor(renderer, 200, 200, 200, 255)
+        SDL2.RenderClear(renderer)
+
+        # Draw over background
+        SDL2.SetRenderDrawColor(renderer, 20, 50, 105, 255)
+        SDL2.RenderDrawLine(renderer,0,0,800,600)
+
+
+        # Create text
+        if isfile(fontFile)
+            font = SDL2.TTF_OpenFont(fontFile, 14)
+            txt = "Hello, world!"
+            text = SDL2.TTF_RenderText_Blended(font, txt, SDL2.Color(20,20,20,255))
+            tex = SDL2.CreateTextureFromSurface(renderer,text)
+
+            fx,fy = Int[1], Int[1]
+            SDL2.TTF_SizeText(font, txt, pointer(fx), pointer(fy))
+            fx,fy = fx[],fy[]
+            SDL2.RenderCopy(renderer, tex, C_NULL, pointer_from_objref(SDL2.Rect(Int32(10), Int32(10),fx,fy)))
+        end
+
+        # Draw on mouse
+        rect = SDL2.Rect(x[],y[],50,50)
+        SDL2.RenderFillRect(renderer, pointer_from_objref(rect) )
+
+        # Flip screen
+        SDL2.RenderPresent(renderer)
+        sleep(0.001)
+    end
+    # Close window
+    SDL2.DestroyWindow(win)
+    SDL2.Quit()
+end
+
+Base.@ccallable function julia_main(args::Vector{String})::Cint
+    ApplicationBuilder.App.change_dir_if_bundle()
+    helloFromSDL()
+    return 0
+end
+
+#julia_main([""])

test/build_examples/sdl.jl

@@ -0,0 +1,58 @@
+using ApplicationBuilder; using BuildApp
+
+examples_blink = joinpath(@__DIR__, "..", "..", "examples", "sdl.jl")
+
+# Allow this file to be called either as a standalone file to build the above
+# example, or from runtests.jl using a globally-defined builddir.
+isdefined(:builddir) || (builddir="builddir")
+
+using SimpleDirectMediaLayer
+SDL2 = SimpleDirectMediaLayer
+
+sdlPkg = Pkg.dir("SimpleDirectMediaLayer")
+homebrew = Pkg.dir("Homebrew")
+
+# Copy and modify all of the required libraries for SDL2 to run. Only need
+# to do this manual step once.
+# Note: this step is required because the SDL libs are linked to reference
+# eachother, so some manual modification must be done. Perhaps this could be
+# automated by ApplicationBuilder as well in the future.
+libs = joinpath(builddir, "sdl_libs")
+mkpath(libs)
+function cp_lib(l)
+    name = basename(l)
+    cp(l, joinpath(libs, name), follow_symlinks=true)
+    l = joinpath(libs, name)
+    run(`install_name_tool -id "$name" $l`)
+    try
+        external_deps = readlines(pipeline(`otool -L $l`,
+                    `grep .julia`,  # filter julia lib deps
+                    `sed 's/(.*)$//'`)) # remove trailing parens
+        for line in external_deps
+            path = strip(line)
+            depname = basename(path)
+            depname = "$(match(r"(\w+)", depname)[1]).dylib" # strip version
+            cmd = `install_name_tool -change "$path" "@rpath/$depname" $l`
+            println(cmd)
+            run(cmd)
+        end
+    end
+end
+cp_lib(SDL2.libSDL2)
+cp_lib(SDL2.libSDL2_ttf)
+cp_lib(SDL2.libSDL2_mixer)
+cp_lib(joinpath(homebrew, "deps/usr/lib/libmodplug.dylib"))
+cp_lib(joinpath(homebrew, "deps/usr/lib/libvorbisfile.dylib"))
+cp_lib(joinpath(homebrew, "deps/usr/lib/libvorbis.dylib"))
+cp_lib(joinpath(homebrew, "deps/usr/lib/libfreetype.dylib"))
+cp_lib(joinpath(homebrew, "deps/usr/lib/libogg.dylib"))
+cp_lib(joinpath(homebrew, "deps/usr/lib/libpng16.dylib"))
+
+
+BuildApp.build_app_bundle(examples_blink;
+    verbose = true,
+    resources = [joinpath(sdlPkg,
+                         "assets","fonts","FiraCode","ttf","FiraCode-Regular.ttf"),
+                ],
+    libraries = ["libs/*"],
+    appname="HelloSDL2", builddir=builddir)