Initial web build commit.

src/main_web/main_web.odin

@@ -0,0 +1,68 @@
+// These procs are the ones that will be called from `index.html`, which is
+// generated from `index_template.html`.
+
+package main_web
+
+import "base:runtime"
+import "core:c"
+import "core:mem"
+
+import emu "../machine"
+import sim "../simulator"
+
+@(private="file")
+web_context: runtime.Context
+
+@export
+main_start :: proc "c" () {
+	context = runtime.default_context()
+
+	// The WASM allocator doesn't seem to work properly in combination with
+	// emscripten. There is some kind of conflict with how the manage memory.
+	// So this sets up an allocator that uses emscripten's malloc.
+	context.allocator = emscripten_allocator()
+	runtime.init_global_temporary_allocator(1*mem.Megabyte)
+
+	// Since we now use js_wasm32 we should be able to remove this and use
+	// context.logger = log.create_console_logger(). However, that one produces
+	// extra newlines on web. So it's a bug in that core lib.
+	context.logger = create_emscripten_logger()
+
+	web_context = context
+
+	// Init the emu 8 "cpu"
+	system := emu.init()
+	s := sim.Simulator {
+		machine = &system,
+		rom_loaded = false,
+		paused = true,
+		step = false,
+		cpu_hz = 700,
+		disasm_follow = true,
+	}
+
+	sim.init(&s)
+}
+
+@export
+main_update :: proc "c" () -> bool {
+	context = web_context
+
+	// TODO
+	sim.update()
+	return sim.should_run()
+}
+
+@export
+main_end :: proc "c" () {
+	context = web_context
+	// TODO
+	sim.shutdown()
+}
+
+@export
+web_window_size_changed :: proc "c" (w: c.int, h: c.int) {
+	context = web_context
+	// TODO
+	game.parent_window_size_changed(int(w), int(h))
+}