move duktape code into a static library.

this means i can try out making a launcher that launches into other
javascript engines like quickjs.

source/CMakeLists.txt

@@ -1,18 +1,7 @@
-add_custom_command(
-	COMMAND ${CMAKE_CURRENT_SOURCE_DIR}/asset_generator.py ${CMAKE_CURRENT_SOURCE_DIR}/game.js ${CMAKE_CURRENT_SOURCE_DIR}/game.c
-	OUTPUT ${CMAKE_CURRENT_SOURCE_DIR}/game.c
-	DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/game.js ${CMAKE_CURRENT_SOURCE_DIR}/asset_generator.py
-	COMMENT "Creating game.c from game.js"
-)
+add_subdirectory(assets)
+add_subdirectory(duktape)
 
-add_custom_command(
-	COMMAND ${CMAKE_CURRENT_SOURCE_DIR}/data_asset_generator.py ${CMAKE_SOURCE_DIR}/data ${CMAKE_CURRENT_SOURCE_DIR}/data_generated.c
-	OUTPUT ${CMAKE_CURRENT_SOURCE_DIR}/data_generated.c
-	DEPENDS ${CMAKE_SOURCE_DIR}/data ${CMAKE_CURRENT_SOURCE_DIR}/data_asset_generator.py
-	COMMENT "Creating data_generated.c from the data directory"
-)
-
-add_executable(WiiDuktape main.c grrlib_duk.c wii_duk.c rgba.c game.c data_generated.c)
-target_link_libraries(WiiDuktape duktape)
+add_executable(WiiDuktape main.c)
 target_link_libraries(WiiDuktape GRRLIB)
+target_link_libraries(WiiDuktape duktape_engine)
 ogc_create_dol(WiiDuktape)

source/assets/CMakeLists.txt

@@ -0,0 +1,16 @@
+add_custom_command(
+	COMMAND ${CMAKE_CURRENT_SOURCE_DIR}/asset_generator.py ${CMAKE_CURRENT_SOURCE_DIR}/game.js ${CMAKE_CURRENT_SOURCE_DIR}/game.c
+	OUTPUT ${CMAKE_CURRENT_SOURCE_DIR}/game.c
+	DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/game.js ${CMAKE_CURRENT_SOURCE_DIR}/asset_generator.py
+	COMMENT "Creating game.c from game.js"
+)
+
+add_custom_command(
+	COMMAND ${CMAKE_CURRENT_SOURCE_DIR}/data_asset_generator.py ${CMAKE_SOURCE_DIR}/data ${CMAKE_CURRENT_SOURCE_DIR}/data_generated.c
+	OUTPUT ${CMAKE_CURRENT_SOURCE_DIR}/data_generated.c
+	DEPENDS ${CMAKE_SOURCE_DIR}/data ${CMAKE_CURRENT_SOURCE_DIR}/data_asset_generator.py
+	COMMENT "Creating data_generated.c from the data directory"
+)
+
+add_library(assets game.c data_generated.c)
+target_include_directories(assets PUBLIC ./include)

source/assets/asset_generator.py

@@ -12,7 +12,7 @@ args = parser.parse_args()
 
 script = Path(args.input).read_text().replace("\n", "\\n").replace('"', '\\"')
 
-code = f"""
+code = f"""#include <game.h>
 const char * program = "{script}";
 """
 

source/assets/include/game.h

@@ -0,0 +1,4 @@
+#ifndef GAME_H
+#define GAME_H
+extern const char * program;
+#endif

source/duktape/CMakeLists.txt

@@ -0,0 +1,13 @@
+set(duktape_engine_sources
+	duktape_engine.c
+	grrlib_duk.c
+	rgba.c
+	wii_duk.c
+)
+
+add_library(duktape_engine ${duktape_engine_sources})
+target_link_libraries(duktape_engine duktape)
+target_link_libraries(duktape_engine GRRLIB)
+target_link_libraries(duktape_engine assets)
+target_include_directories(duktape_engine PUBLIC ./include)
+target_include_directories(duktape_engine PRIVATE ./include_private)

source/duktape/duktape_engine.c

@@ -0,0 +1,60 @@
+#include <grrlib.h>
+#include <duktape.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <ogc/lwp_watchdog.h>
+
+#include <data.h>
+#include <wii_duk.h>
+#include <game.h>
+
+const float MICROSECOND = 0.000001f;
+
+static float deltatime = 1.0f/60;
+static unsigned int green = RGBA(0, 255, 0, 255); 
+static GRRLIB_ttfFont * font;
+
+static void duk_fatal_error(void *udata, const char *msg) {
+	const char * err_message_format = "an error has occured: %s";
+	size_t message_size = strlen(err_message_format) + strlen(msg) * sizeof(char *);
+	char * message = malloc(message_size);
+	snprintf(message, message_size, err_message_format, msg);
+	while (1) {
+		GRRLIB_PrintfTTF(0, 0, font, message, 12, green);
+		GRRLIB_Render();
+	}
+}
+
+void duktape(GRRLIB_ttfFont * global_font, bool * running) {
+	font = global_font;	
+	duk_context * ctx = duk_create_heap(NULL, NULL, NULL, NULL, duk_fatal_error);
+
+	// create a wii object on the global object (globalThis)
+	define_wii_object(ctx, font, running, &deltatime);
+	duk_put_global_string(ctx, "wii");
+
+	// evaluate functions from game.js
+	duk_eval_string_noresult(ctx, program);
+
+	// call start function
+	duk_get_global_string(ctx, "start");
+	duk_call(ctx, 0);
+	duk_pop(ctx);
+
+	while (*running) {
+		const unsigned int beginningOfFrame = ticks_to_microsecs(gettime());
+
+		PAD_ScanPads();
+
+		// call update function
+		duk_get_global_string(ctx, "update");
+		duk_call(ctx, 0);
+		duk_pop(ctx);
+
+		GRRLIB_Render();
+
+		const unsigned int endOfFrame = ticks_to_microsecs(gettime());
+		deltatime = (endOfFrame - beginningOfFrame) * MICROSECOND;
+	}
+}
+

source/duktape/include/duktape_engine.h

@@ -0,0 +1,5 @@
+#ifndef DUKTAPE_ENGINE_H
+#define DUKTAPE_ENGINE_H
+#include <grrlib.h>
+void duktape(GRRLIB_ttfFont * global_font, bool * running);
+#endif

source/main.c

@@ -4,27 +4,11 @@
 #include <stdlib.h>
 #include <ogc/lwp_watchdog.h>
 
-#include "data.h"
-#include "wii_duk.h"
+#include <data.h>
+#include <duktape_engine.h>
 
-const float MICROSECOND = 0.000001f;
-
-extern const char * program;
 static bool running = true;
 static GRRLIB_ttfFont * font;
-static unsigned int green = RGBA(0, 255, 0, 255); 
-static float deltatime = 1.0f/60;
-
-static void duk_fatal_error(void *udata, const char *msg) {
-	const char * err_message_format = "an error has occured: %s";
-	size_t message_size = strlen(err_message_format) + strlen(msg) * sizeof(char *);
-	char * message = malloc(message_size);
-	snprintf(message, message_size, err_message_format, msg);
-	while (1) {
-		GRRLIB_PrintfTTF(0, 0, font, message, 12, green);
-		GRRLIB_Render();
-	}
-}
 
 int main(int argc, char **argv) {
 	GRRLIB_Init();
@@ -37,37 +21,8 @@ int main(int argc, char **argv) {
 
 	font = GRRLIB_LoadTTF(pixel_operator_font, pixel_operator_font_size);
 
-	duk_context * ctx = duk_create_heap(NULL, NULL, NULL, NULL, duk_fatal_error);
+	duktape(font, &running);
 	
-	// create a wii object on the global object (globalThis)
-	define_wii_object(ctx, font, &running, &deltatime);
-	duk_put_global_string(ctx, "wii");
-
-	// evaluate functions from game.js
-	duk_eval_string_noresult(ctx, program);
-
-	// call start function
-	duk_get_global_string(ctx, "start");
-	duk_call(ctx, 0);
-	duk_pop(ctx);
-
-	while (running) {
-		const unsigned int beginningOfFrame = ticks_to_microsecs(gettime());
-
-		PAD_ScanPads();
-
-		// call update function
-		duk_get_global_string(ctx, "update");
-		duk_call(ctx, 0);
-		duk_pop(ctx);
-
-		GRRLIB_Render();
-
-		const unsigned int endOfFrame = ticks_to_microsecs(gettime());
-		deltatime = (endOfFrame - beginningOfFrame) * MICROSECOND;
-	}
-
-	duk_destroy_heap(ctx);
 	GRRLIB_Exit();
 
 	return 0;