find videomode

1 files changed, 31 insertions, 3 deletions

diff --git a/api.c b/api.c
index 8001f8f..b24514e 100644
--- a/api.c
+++ b/api.c
@@ -10,18 +10,28 @@
 

 struct engserver *engserver = NULL;

 struct engclient *engclient = NULL;

+struct engineapi *engineapi = NULL;

+struct enginetools *enginetools = NULL;

 struct demoplayer *demoplayer = NULL;

+struct videomode **videomode = NULL;

+struct movieinfo *movieinfo = NULL;

 void (*cbuf_addtext)(char *) = NULL;

 

+// TODO: should this be split up?

+

 bool api_init(void) {

 	void *engine_dll = os_dlhandle("engine");

 	createinterface_func engine_factory =

 		(createinterface_func)os_dlsym(engine_dll, "CreateInterface");

 	if (!engine_factory) bail("couldn't get engine factory");

-	engserver = engine_factory(INTERFACEVERSION_VENGINESERVER, NULL);

+	engserver = engine_factory(VENGINE_SERVER_INTERFACE_VERSION, NULL);

 	if (!engserver) bail("couldn't get IVEngineServer from engine");

 	engclient = engine_factory(VENGINE_CLIENT_INTERFACE_VERSION, NULL);

 	if (!engclient) bail("couldn't get IVEngineClient from engine");

+	engineapi = engine_factory(VENGINE_LAUNCHER_INTERFACE_VERSION, NULL);

+	if (!engineapi) bail("couldn't get IEngineAPI from engine");

+	enginetools = engine_factory(VENGINE_TOOL_INTERFACE_VERSION, NULL);

+	if (!engineapi) bail("couldn't get IEngineTools from engine");

 

 	// find cbuf_addtext

 	const u8 *instr = (const u8 *)engserver->vt->server_command;

@@ -41,13 +51,31 @@ bool api_init(void) {
 

 	// find demoplayer

 	instr = (const u8 *)engclient->vt->is_playing_demo;

-	debug("is_playing_demo = %p", (void *)instr); 

 	// CEngineClient::IsPlayingDemo is a wrapper around a demoplayer call

-	// The first thing it does should be load demoplayer into ECX

+	// The first thing it does should be load a ptr to demoplayer into ECX

 	if (instr[0] != X86_MOVRMW || instr[1] != X86_MODRM(0, 1, 5))

 		bail("couldn't get demoplayer");

 	demoplayer = **(struct demoplayer ***)(instr + 2);

 	debug("demoplayer = %p", (void *)demoplayer);

+

+	// find videomode

+	// CEngineAPI::SetEngineWindow calls videomode->SetGameWindow after

+	// detaching the current window with another vcall. Look for the second one.

+	// This, like the demoplayer, is a pointer. Mind the double dereference.

+	instr = (const u8 *)engineapi->vt->set_engine_window;

+	int mov_ecx_counter = 0;

+	for (const u8 *p = instr; p - instr < 64;) {

+		if (p[0] == X86_MOVRMW && p[1] == X86_MODRM(0, 1, 5)

+				&& ++mov_ecx_counter == 2) {

+			videomode = *(struct videomode ***)(p + 2);

+			break;

+		}

+		int l = x86_len(p);

+		if (l == -1)

+			bail("invalid instruction looking for videomode");

+		p += l;

+	}

+	debug("videomode = %p", (void *)videomode);

 	

 	return true;

 }