working bgfx and SDL integration

10 files changed, 213 insertions, 54 deletions

diff --git a/.gitmodules b/.gitmodules
index 993223c..d15c2d1 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,12 @@
 [submodule "external/SDL"]
 	path = external/SDL
 	url = https://github.com/libsdl-org/SDL.git
+[submodule "external/bx"]
+	path = external/bx
+	url = https://github.com/bkaradzic/bx.git
+[submodule "external/bimg"]
+	path = external/bimg
+	url = https://github.com/bkaradzic/bimg.git
+[submodule "external/bgfx"]
+	path = external/bgfx
+	url = https://github.com/bkaradzic/bgfx.git
diff --git a/.vimrc b/.vimrc
new file mode 100644
index 0000000..bcaff77
--- /dev/null
+++ b/.vimrc
@@ -0,0 +1,2 @@
+" press F5 to compile and execute the project code
+map <f5> :AsyncRun -save=1 -cwd=<root> ./build ; ./run <CR>
diff --git a/CMakeLists.txt b/CMakeLists.txt
index c771530..fb32fbf 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,10 +1,11 @@
 cmake_minimum_required(VERSION 3.25.1)
+include(ExternalProject)
 
 project(space_squad)
 
 file(GLOB SOURCES
 	"src/main.c"
-	"src/lib/lib.c"
+	"src/rodeo.c"
 	)
 
 #add_library(lib src/lib.c)
@@ -13,16 +14,34 @@ add_executable(${PROJECT_NAME} ${SOURCES})
 
 add_subdirectory(external/SDL)
 
+ExternalProject_Add(project_bgfx
+	#BUILD_IN_SOURCE true # this just doesn't work
+	SOURCE_DIR "external/bgfx"
+	BINARY_DIR "../external/bgfx"
+	DOWNLOAD_COMMAND ""
+	CONFIGURE_COMMAND ""
+	#BUILD_ALWAYS true
+	BUILD_COMMAND make linux
+	INSTALL_COMMAND ""
+	)
+
+
 target_include_directories(${PROJECT_NAME}
 	PUBLIC external/SDL/include
+	PUBLIC external/bgfx/include
+	PUBLIC external/bx/include
 	)
 
 target_link_directories(${PROJECT_NAME}
 	PRIVATE external/SDL
+	PRIVATE external/bgfx
 	)
 
+ExternalProject_Get_Property(project_bgfx BINARY_DIR)
+#message("++" ${BINARY_DIR})
 target_link_libraries(${PROJECT_NAME}
 	SDL2::SDL2 # dynamic lib
 	#SDL3::SDL3 # dynamic lib
 	#SDL3::SDL3-static # static lib
+	${BINARY_DIR}/.build/linux64_gcc/bin/libbgfx-shared-libRelease.so
 	)
diff --git a/external/bgfx b/external/bgfx
new file mode 160000
+Subproject 5f435ea56b29c3dd3ebdf9fab1a8f408681ff91
diff --git a/external/bimg b/external/bimg
new file mode 160000
+Subproject 1395f4e969fa0aac6158fb3caf0873eaed38d77
diff --git a/external/bx b/external/bx
new file mode 160000
+Subproject 340000754fe3fcf63c16841d228c33a461c335a
diff --git a/src/compile_flags.txt b/src/compile_flags.txt
index 268f070..90e041f 100644
--- a/src/compile_flags.txt
+++ b/src/compile_flags.txt
@@ -1,2 +1,4 @@
 -I./
 -I../external/SDL/include
+-I../external/bgfx/include
+-I../external/bx/include
diff --git a/src/main.c b/src/main.c
index df1ac41..586d476 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,69 +1,29 @@
 #include <stdio.h>
 #include <stdbool.h>
-#include "lib/lib.h"
 #include "SDL2/SDL.h"
+#include "SDL2/SDL_syswm.h"
+#include "bgfx/c99/bgfx.h"
 
-const int SCREEN_WIDTH = 640;
-const int SCREEN_HEIGHT = 480;
+#include "rodeo.h"
+
+Rodeo__Data_t _state = {0};
+Rodeo__Data_t* state = &_state;
 
 int
 main()
 {
-	SDL_Window* window = NULL;
-
-	SDL_Surface* screenSurface = NULL;
+	Rodeo__init_window(state, 480, 640, "Rodeo Window");
 
-	if(SDL_Init(SDL_INIT_VIDEO) < 0)
-	{
-		printf("SDL could not initialize! SDL_Error: %s\n", SDL_GetError());
-	}
-	else
+	while(!state->quit)
 	{
-		window = SDL_CreateWindow(
-				"SDL Tutorial",
-				SDL_WINDOWPOS_UNDEFINED,
-				SDL_WINDOWPOS_UNDEFINED,
-				SCREEN_WIDTH,
-				SCREEN_HEIGHT,
-				SDL_WINDOWEVENT_SHOWN
-				);
-		if(window == NULL)
-		{
-			printf("Window could not be created! SDL_Error %s\n", SDL_GetError());
-		}
-		else
-		{
-			screenSurface = SDL_GetWindowSurface(window);
+		Rodeo__begin(state);
 
-			SDL_FillRect(
-					screenSurface,
-					NULL,
-					SDL_MapRGB(screenSurface->format, 0xFF, 0xFF, 0xFF)
-					);
+		bgfx_dbg_text_printf(0, 2, 0x6f, "Description: Initialization and debug text.");
 
-			SDL_UpdateWindowSurface(window);
-
-			SDL_Event e;
-			bool quit = false;
-			while(quit == false)
-			{
-				while(SDL_PollEvent(&e))
-				{
-					if(e.type == SDL_QUIT)
-					{
-						quit = true;
-					}
-				}
-			}
-		}
+		Rodeo__end(state);
 	}
 
-	SDL_DestroyWindow(window);
-
-	SDL_Quit();
-
-	printf("number: %d\n", add(1, 3));
-	printf("Hello World");
-
+	Rodeo__deinit_window(state);
+	Rodeo__quit();
 	return 0;
 }
diff --git a/src/rodeo.c b/src/rodeo.c
new file mode 100644
index 0000000..46ed014
--- /dev/null
+++ b/src/rodeo.c
@@ -0,0 +1,125 @@
+#include "SDL2/SDL.h"
+#include "SDL2/SDL_syswm.h"
+#include "bgfx/c99/bgfx.h"
+
+#include "rodeo.h"
+
+//static Rodeo__Data_t Rodeo__State = { 0 };
+
+void
+Rodeo__\
+init_window(
+		Rodeo__Data_t* state,
+		int screen_height,
+		int screen_width,
+		char* title
+		)
+{
+	state->window = NULL;
+	state->screen_surface = NULL;
+	state->screen_height = screen_height;
+	state->screen_width = screen_width;
+
+	if(SDL_Init(SDL_INIT_VIDEO) < 0)
+	{
+		printf("SDL could not initialize! SDL_Error: %s\n", SDL_GetError());
+		exit(EXIT_FAILURE);
+	}
+
+	state->window = SDL_CreateWindow(
+			title,
+			SDL_WINDOWPOS_UNDEFINED,
+			SDL_WINDOWPOS_UNDEFINED,
+			screen_width,
+			screen_height,
+			SDL_WINDOW_SHOWN
+			);
+
+	if(state->window == NULL)
+	{
+		printf("Window could not be created! SDL_Error %s\n", SDL_GetError());
+		exit(EXIT_FAILURE);
+	}
+
+	SDL_VERSION(&state->wmi.version);
+	if(
+			!SDL_GetWindowWMInfo(
+				state->window,
+				&state->wmi
+				)
+	  )
+	{
+		printf("SDL_Error %s\n", SDL_GetError());
+		exit(EXIT_FAILURE);
+	}
+
+	bgfx_render_frame(-1);
+
+	bgfx_platform_data_t pd;
+	memset(&pd, 0, sizeof(bgfx_platform_data_t));
+
+	pd.ndt = state->wmi.info.x11.display;
+	pd.nwh = (void*)(uintptr_t)state->wmi.info.x11.window;
+
+	bgfx_init_t init = {0};
+	bgfx_init_ctor(&init);
+	init.type = BGFX_RENDERER_TYPE_COUNT; // auto determine renderer
+	init.resolution.width = state->screen_width;
+	init.resolution.height = state->screen_height;
+	init.resolution.reset = BGFX_RESET_VSYNC;
+	init.platformData = pd;
+	bgfx_init(&init);
+
+	bgfx_reset(state->screen_width, state->screen_height, BGFX_RESET_VSYNC, init.resolution.format);
+
+	bgfx_set_debug(BGFX_DEBUG_TEXT);
+
+	bgfx_set_view_clear(
+			0,
+			BGFX_CLEAR_COLOR | BGFX_CLEAR_DEPTH,
+			0x443355FF,
+			1.0f,
+			0
+			);
+	bgfx_set_view_rect(0, 0, 0, state->screen_width, state->screen_height);
+
+	bgfx_touch(0);
+
+	bgfx_frame(false);
+}
+
+void
+Rodeo__\
+deinit_window(Rodeo__Data_t* state)
+{
+	bgfx_shutdown();
+	SDL_DestroyWindow(state->window);
+}
+
+void
+Rodeo__\
+quit()
+{
+	SDL_Quit();
+}
+
+void
+Rodeo__\
+begin(Rodeo__Data_t* state)
+{
+}
+
+void
+Rodeo__\
+end(Rodeo__Data_t* state)
+{
+	while(SDL_PollEvent(&state->sdl_event))
+	{
+		if(state->sdl_event.type == SDL_QUIT)
+		{
+			state->quit = true;
+		}
+	}
+	bgfx_touch(0);
+	bgfx_frame(false);
+}
diff --git a/src/rodeo.h b/src/rodeo.h
new file mode 100644
index 0000000..e468c11
--- /dev/null
+++ b/src/rodeo.h
@@ -0,0 +1,42 @@
+#include <stdbool.h>
+#include "SDL2/SDL.h"
+#include "SDL2/SDL_syswm.h"
+
+typedef
+struct
+Rodeo__\
+Data_t
+{
+	SDL_Window* window;
+	SDL_Surface* screen_surface;
+	SDL_SysWMinfo wmi;
+	int screen_width;
+	int screen_height;
+	SDL_Event sdl_event;
+	bool quit;
+} Rodeo__Data_t;
+
+void
+Rodeo__\
+init_window(
+		Rodeo__Data_t* state,
+		int screen_height,
+		int screen_width,
+		char* title
+		);
+
+void
+Rodeo__\
+deinit_window(Rodeo__Data_t* state);
+
+void
+Rodeo__\
+quit();
+
+void
+Rodeo__\
+begin(Rodeo__Data_t* state);
+
+void
+Rodeo__\
+end(Rodeo__Data_t* state);