wtf am i doing

16 files changed, 1250 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..0eb2c8f
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+004
+004.*
+*.o
+*.d
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..8788ff7
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,56 @@
+CCXX     := g++
+CC       := gcc
+LD       := gcc
+SDL2-CFG := sdl2-config
+SRC      := $(wildcard *.c) $(wildcard *.cpp)
+OBJ      := $(patsubst %.c,%.o,$(patsubst %.cpp,%.o,$(SRC)))
+WINOBJ   := $(patsubst %.c,%.win.o,$(patsubst %.cpp,%.win.o,$(SRC)))
+DEP      := $(patsubst %.c,%.d,$(patsubst %.cpp,%.d,$(SRC)))
+NAME     := 004
+ifeq ($(TARGET),windows)
+	SDL2-CFG := /usr/x86_64-w64-mingw32/bin/sdl2-config
+	CCXX     := x86_64-w64-mingw32-$(CCXX)
+	CC       := x86_64-w64-mingw32-$(CC)
+	LD       := x86_64-w64-mingw32-$(LD)
+	NAME     := $(NAME).exe
+	OBJ      := $(WINOBJ)
+endif
+LZR_FLAGS := -DLZR_DISABLE_IMAGE -DLZR_DISABLE_GFX -DLZR_DISABLE_MIXER \
+             -DLZR_DISABLE_DEVMODE
+CFLAGS    := -Wall -Wextra -std=c99 -pedantic -MMD \
+             -D_POSIX_C_SOURCE=200809L $(LZR_FLAGS) $(shell $(SDL2-CFG) --cflags)
+CXXFLAGS  := -Wall -Wextra -std=c++03 -pedantic -MMD \
+             -nostdlib -fno-rtti -fno-exceptions \
+             $(LZR_FLAGS) $(shell $(SDL2-CFG) --cflags)
+LDFLAGS   := -lm $(shell $(SDL2-CFG) --libs) -lSDL2_mixer
+
+all: $(NAME)
+
+$(NAME): $(OBJ)
+	$(LD) -o $(NAME) $(OBJ) $(LDFLAGS)
+
+%.o: %.cpp
+	$(CCXX) $(CXXFLAGS) -c -o $@ $<
+
+%.win.o: %.cpp
+	$(CCXX) $(CXXFLAGS) -c -o $@ $<
+
+%.o: %.c
+	$(CC) $(CFLAGS) -c -o $@ $<
+
+%.win.o: %.c
+	$(CC) $(CFLAGS) -c -o $@ $<
+
+clean:
+	rm -rf $(NAME) $(OBJ) $(WINOBJ) $(DEP)
+
+run: $(NAME)
+	./$(NAME)
+
+re:
+	make clean
+	make
+
+.PHONY: all clean run re
+
+-include $(DEP)
diff --git a/cfg.h b/cfg.h
new file mode 100644
index 0000000..308c2c9
--- /dev/null
+++ b/cfg.h
@@ -0,0 +1,20 @@
+#pragma once
+#include "lzr.h"
+
+enum {
+	CFG_DWIDTH  = 421 * 2,
+	CFG_DHEIGHT = 595,
+	CFG_FPS     = 30,
+	CFG_TSIZE   = 16,
+};
+
+static const LZR_Config cfg = {
+	CFG_DWIDTH,
+	CFG_DHEIGHT,
+	CFG_FPS,
+	CFG_TSIZE,
+	"sunny day",
+	0.0,
+	false,
+	true
+};
diff --git a/input.c b/input.c
new file mode 100644
index 0000000..03f0a0e
--- /dev/null
+++ b/input.c
@@ -0,0 +1,39 @@
+#include "input.h"
+#include "lzr.h"
+
+static const unsigned int keys[5] = {LZR_BUTTON_LEFT, LZR_BUTTON_RIGHT,
+                                     LZR_BUTTON_UP, LZR_BUTTON_DOWN,
+                                     LZR_BUTTON_O};
+static int states[5] = {0};
+
+void input_update(void)
+{
+	int i = 5;
+	while (i-- > 0)
+		if (LZR_ButtonDown(keys[i]))
+			states[i] =
+			    (states[i] == KS_UP) ? (KS_PRESSED) : (KS_DOWN);
+		else
+			states[i] = KS_UP;
+}
+
+int input_up(unsigned int k)
+{
+	if (k >= 5)
+		return 0;
+	return states[k] == KS_UP;
+}
+
+int input_down(unsigned int k)
+{
+	if (k >= 5)
+		return 0;
+	return states[k] == KS_DOWN || states[k] == KS_PRESSED;
+}
+
+int input_pressed(unsigned int k)
+{
+	if (k >= 5)
+		return 0;
+	return states[k] == KS_PRESSED;
+}
diff --git a/input.h b/input.h
new file mode 100644
index 0000000..5aebd66
--- /dev/null
+++ b/input.h
@@ -0,0 +1,17 @@
+#pragma once
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+enum Key { K_LEFT, K_RIGHT, K_UP, K_DOWN, K_O };
+
+enum KeyState { KS_UP, KS_DOWN, KS_PRESSED };
+
+void input_update(void);
+int input_up(unsigned int);
+int input_down(unsigned int);
+int input_pressed(unsigned int);
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/lzr.c b/lzr.c
new file mode 100644
index 0000000..edc6046
--- /dev/null
+++ b/lzr.c
@@ -0,0 +1,916 @@
+/* Licensing information can be found at the end of the file. */
+#include "lzr.h"
+#include <SDL2/SDL.h>
+#ifdef LZR_ENABLE_GFX
+#	include <SDL2/SDL2_gfxPrimitives.h>
+#endif
+#ifdef LZR_ENABLE_IMAGE
+#	include <SDL2/SDL_image.h>
+#endif
+#ifdef LZR_ENABLE_MIXER
+#	include <SDL2/SDL_mixer.h>
+#endif
+#ifdef LZR_ENABLE_DEVMODE
+#	include <sys/stat.h>
+#endif
+#include <stdbool.h>
+#include <stdint.h>
+#include <string.h>
+#include <unistd.h>
+
+#define UNPACKED_COLOR   color[0], color[1], color[2]
+#define SCODE_BIND_MENU  SDL_SCANCODE_F1
+#define SCODE_FULLSCREEN SDL_SCANCODE_F11
+
+static LZR_Config config = {0};
+static char *basepath = NULL;
+static SDL_Window *window = NULL;
+static SDL_Renderer *renderer = NULL;
+static SDL_Texture *target = NULL;
+static uint_least64_t next_time = 0;
+static uint_least64_t min_dt = 0;
+static bool should_quit = false;
+static struct {
+	SDL_Texture *tex;
+	int width, height;
+	char *path;
+	long mtime;
+} images[LZR_MAX_IMAGES] = {0};
+static unsigned int color[3] = {0};
+static unsigned int map[LZR_BUTTON_COUNT] = {
+    SDL_SCANCODE_LEFT, SDL_SCANCODE_RIGHT, SDL_SCANCODE_UP,
+    SDL_SCANCODE_DOWN, SDL_SCANCODE_X,     SDL_SCANCODE_C};
+static bool input[LZR_BUTTON_COUNT] = {false};
+static SDL_Point *points = NULL;
+static uint64_t tick = 0;
+static int off_x = 0;
+static int off_y = 0;
+static float scale = 1.0;
+static int mouse_x = 0;
+static int mouse_y = 0;
+
+#ifdef LZR_ENABLE_MIXER
+static struct {
+	Mix_Chunk *ptr;
+} sounds[LZR_MAX_SOUNDS] = {0};
+static Mix_Music *music = NULL;
+#endif
+
+static char *_lzrstrdup(const char *str)
+{
+	char *const cpy = malloc(strlen(str) + 1);
+	if (cpy == NULL)
+		return NULL;
+	strcpy(cpy, str);
+	return cpy;
+}
+
+static int _scode_to_button(unsigned int scode)
+{
+	for (int i = 0; i < LZR_BUTTON_MOUSE_L; i++)
+		if (map[i] == scode)
+			return i;
+	return -1;
+}
+
+static void _draw_btn(SDL_Renderer *ren, int btn, int x, int y,
+                      unsigned int size)
+{
+#ifdef LZR_ENABLE_GFX
+	const unsigned int size_2thirds = size * 2 / 3;
+	switch (btn) {
+	case LZR_BUTTON_LEFT:
+		filledTrigonRGBA(ren, x - size / 2, y, x + size / 2,
+		                 y + size_2thirds, x + size / 2,
+		                 y - size_2thirds, 0, 0, 0, 255);
+		break;
+	case LZR_BUTTON_RIGHT:
+		filledTrigonRGBA(ren, x + size / 2, y, x - size / 2,
+		                 y + size_2thirds, x - size / 2,
+		                 y - size_2thirds, 0, 0, 0, 255);
+		break;
+	case LZR_BUTTON_UP:
+		filledTrigonRGBA(ren, x, y - size / 2, x - size_2thirds,
+		                 y + size / 2, x + size_2thirds, y + size / 2,
+		                 0, 0, 0, 255);
+		break;
+	case LZR_BUTTON_DOWN:
+		filledTrigonRGBA(ren, x, y + size / 2, x - size_2thirds,
+		                 y - size / 2, x + size_2thirds, y - size / 2,
+		                 0, 0, 0, 255);
+		break;
+	case LZR_BUTTON_O:
+		filledCircleRGBA(ren, x, y, size * 2 / 3, 0, 0, 0, 255);
+		break;
+	case LZR_BUTTON_X:
+		thickLineRGBA(ren, x - size / 2, y - size / 2, x + size / 2,
+		              y + size / 2, size / 16 + 1, 0, 0, 0, 255);
+		thickLineRGBA(ren, x + size / 2, y - size / 2, x - size / 2,
+		              y + size / 2, size / 16 + 1, 0, 0, 0, 255);
+		break;
+	default:
+		break;
+	}
+#else
+	(void)ren, (void)btn, (void)x, (void)y, (void)size;
+#endif
+}
+
+static void _bind_menu(void)
+{
+	SDL_Log("entering bind menu");
+	SDL_Window *win = NULL;
+	SDL_Renderer *ren = NULL;
+	if (SDL_CreateWindowAndRenderer(256, 256, 0, &win, &ren) < 0) {
+		SDL_Log("%s", SDL_GetError());
+		return;
+	}
+	int btn = 0;
+	SDL_Event e;
+	while (btn < LZR_BUTTON_MOUSE_L) {
+		while (SDL_PollEvent(&e)) {
+			if (e.type != SDL_KEYDOWN || e.key.repeat ||
+			    e.key.keysym.scancode == SCODE_BIND_MENU ||
+			    e.key.keysym.scancode == SCODE_FULLSCREEN)
+				continue;
+			if (e.key.keysym.scancode == SDL_SCANCODE_ESCAPE ||
+			    e.type == SDL_QUIT)
+				goto exit_bind_menu;
+			LZR_ButtonBind(btn, e.key.keysym.scancode);
+			btn++;
+		}
+		SDL_SetRenderDrawColor(ren, 220, 220, 200, 255);
+		SDL_RenderClear(ren);
+		SDL_SetRenderDrawColor(ren, 0, 0, 0, 255);
+		_draw_btn(ren, btn, 128, 128, 104);
+		SDL_RenderPresent(ren);
+		sleep(0);
+	}
+exit_bind_menu:
+	SDL_DestroyRenderer(ren);
+	SDL_DestroyWindow(win);
+	SDL_Log("leaving bind menu");
+}
+
+int LZR_Init(LZR_Config cfg)
+{
+	memcpy(&config, &cfg, sizeof(config));
+	if (config.display_width == 0) {
+		SDL_Log("display_width can't be 0");
+		return -1;
+	}
+	if (config.display_height == 0) {
+		SDL_Log("display_height can't be 0");
+		return -1;
+	}
+	if (config.title == NULL) {
+		SDL_Log("title is NULL, defaulting to 'LZR'");
+		config.title = "LZR";
+	}
+	if (config.tile_size == 0)
+		config.tile_size = 1;
+	if (config.ratio <= 0.0)
+		config.ratio = 1.0;
+	else {
+		const double ratio =
+		    (float)config.display_width / (float)config.display_height;
+		config.ratio /= ratio;
+	}
+
+	if (SDL_Init(SDL_INIT_VIDEO) < 0) {
+		SDL_Log("%s", SDL_GetError());
+		return -1;
+	}
+#ifdef LZR_ENABLE_IMAGE
+	if (IMG_Init(IMG_INIT_PNG) != IMG_INIT_PNG) {
+		SDL_Log("%s", IMG_GetError());
+		return -1;
+	}
+#endif
+#ifdef LZR_ENABLE_MIXER
+	if (Mix_Init(MIX_INIT_OGG) != MIX_INIT_OGG) {
+		SDL_Log("%s", Mix_GetError());
+		return -1;
+	}
+	if (Mix_OpenAudio(44100, MIX_DEFAULT_FORMAT, 8, 1024) < 0) {
+		SDL_Log("%s", Mix_GetError());
+		return -1;
+	}
+#endif
+	basepath = SDL_GetBasePath();
+	if (basepath == NULL) {
+		SDL_Log("%s", SDL_GetError());
+		return -1;
+	}
+	const int dwidth = config.display_width * config.ratio;
+	window = SDL_CreateWindow(config.title, SDL_WINDOWPOS_UNDEFINED,
+	                          SDL_WINDOWPOS_UNDEFINED, dwidth,
+	                          config.display_height, SDL_WINDOW_RESIZABLE);
+	if (window == NULL) {
+		SDL_Log("%s", SDL_GetError());
+		return -1;
+	}
+	renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);
+	if (renderer == NULL) {
+		SDL_Log("%s", SDL_GetError());
+		return -1;
+	}
+	target = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_RGB888,
+	                           SDL_TEXTUREACCESS_TARGET,
+	                           config.display_width, config.display_height);
+	if (target == NULL) {
+		SDL_Log("%s", SDL_GetError());
+		return -1;
+	}
+	points =
+	    calloc(cfg.display_width * cfg.display_height, sizeof(SDL_Point));
+	if (points == NULL) {
+		SDL_Log("calloc failed");
+		return -1;
+	}
+	SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, 0);
+	if (config.target_fps) {
+		min_dt = 1000 / config.target_fps;
+		next_time = SDL_GetTicks64();
+	}
+	if (config.hide_cursor && SDL_ShowCursor(SDL_DISABLE) < 0) {
+		SDL_Log("%s", SDL_GetError());
+		return -1;
+	}
+	return 0;
+}
+
+void LZR_Quit(void)
+{
+	LZR_StopMusic();
+#ifdef LZR_ENABLE_MIXER
+	for (int i = 0; i < LZR_MAX_SOUNDS; i++)
+		if (sounds[i].ptr != NULL) {
+			Mix_FreeChunk(sounds[i].ptr);
+			sounds[i].ptr = NULL;
+			SDL_Log("destroyed sound %d", i);
+		}
+	Mix_CloseAudio();
+	Mix_Quit();
+#endif
+	for (int i = 0; i < LZR_MAX_IMAGES; i++) {
+		if (images[i].tex != NULL) {
+			SDL_DestroyTexture(images[i].tex);
+			images[i].tex = NULL;
+			SDL_Log("destroyed image %d", i);
+		}
+		if (images[i].path != NULL) {
+			free(images[i].path);
+			images[i].path = NULL;
+		}
+	}
+	if (points != NULL) {
+		free(points);
+		points = NULL;
+	}
+	if (target != NULL) {
+		SDL_DestroyTexture(target);
+		target = NULL;
+	}
+	if (renderer != NULL) {
+		SDL_DestroyRenderer(renderer);
+		renderer = NULL;
+	}
+	if (window != NULL) {
+		SDL_DestroyWindow(window);
+		window = NULL;
+	}
+	if (basepath != NULL) {
+		SDL_free(basepath);
+		basepath = NULL;
+	}
+#ifdef LZR_ENABLE_IMAGE
+	IMG_Quit();
+#endif
+	SDL_Quit();
+}
+
+bool LZR_ShouldQuit(void)
+{
+	return should_quit;
+}
+
+char *LZR_PathPrefix(const char *path)
+{
+	if (path == NULL) {
+		SDL_Log("path is NULL");
+		return NULL;
+	}
+	if (basepath == NULL) {
+		SDL_Log("basepath is NULL");
+		return _lzrstrdup(path);
+	}
+	char *const buf = malloc(strlen(basepath) + strlen(path) + 1);
+	if (buf == NULL) {
+		SDL_Log("malloc failed");
+		return NULL;
+	}
+	strcpy(buf, basepath);
+	strcat(buf, path);
+	return buf;
+}
+
+int LZR_ImageLoad(const char *path)
+{
+	char *apath;
+	long mtime = 0;
+#ifdef LZR_ENABLE_DEVMODE
+	apath = LZR_PathPrefix(path);
+	if (apath == NULL)
+		return -1;
+	struct stat st = {0};
+	(void)stat(apath, &st); /* stat can fail safely */
+	mtime = st.st_mtim.tv_nsec;
+#endif
+	int i;
+	for (i = 0; i < LZR_MAX_IMAGES; i++) {
+		if (images[i].path != NULL &&
+		    strcmp(images[i].path, path) == 0) {
+			if (mtime != images[i].mtime) {
+				SDL_Log("reloading %d", i);
+				break;
+			}
+			return i;
+		}
+		if (images[i].tex == NULL)
+			break;
+	}
+	if (i >= LZR_MAX_IMAGES) {
+		SDL_Log("reached image limit (%d)", LZR_MAX_IMAGES);
+		return -1;
+	}
+	apath = LZR_PathPrefix(path);
+	if (apath == NULL) {
+		SDL_Log("LZR_PathPrefix failed");
+		return -1;
+	}
+#ifdef LZR_ENABLE_IMAGE
+	SDL_Surface *const surf = IMG_Load(apath);
+#else
+	SDL_Surface *const surf = SDL_LoadBMP(apath);
+#endif
+	free(apath);
+	if (surf == NULL) {
+		SDL_Log("%s: %s", path, SDL_GetError());
+		return -1;
+	}
+	SDL_Texture *const tex = SDL_CreateTextureFromSurface(renderer, surf);
+	SDL_FreeSurface(surf);
+	if (tex == NULL) {
+		SDL_Log("%s", SDL_GetError());
+		return -1;
+	}
+	if (images[i].tex != NULL)
+		SDL_DestroyTexture(images[i].tex);
+	images[i].tex = tex;
+	images[i].mtime = mtime;
+	if (SDL_SetTextureBlendMode(images[i].tex, SDL_BLENDMODE_BLEND) < 0) {
+		SDL_Log("%s", SDL_GetError());
+		return -1;
+	}
+	if (SDL_QueryTexture(tex, NULL, NULL, &images[i].width,
+	                     &images[i].height)) {
+		SDL_Log("%s", SDL_GetError());
+		return -1;
+	}
+	if (images[i].path == NULL)
+		images[i].path = _lzrstrdup(path);
+	return i;
+}
+
+int LZR_SoundLoad(const char *path, float volume)
+{
+#ifdef LZR_ENABLE_MIXER
+	int i;
+	for (i = 0; i < LZR_MAX_SOUNDS; i++)
+		if (sounds[i].ptr == NULL)
+			break;
+	if (i >= LZR_MAX_SOUNDS) {
+		SDL_Log("reached sounds limit (%d)", LZR_MAX_SOUNDS);
+		return -1;
+	}
+	char *const apath = LZR_PathPrefix(path);
+	if (apath == NULL) {
+		SDL_Log("LZR_PathPrefix failed");
+		return -1;
+	}
+	Mix_Chunk *const chunk = Mix_LoadWAV(apath);
+	free(apath);
+	if (chunk == NULL) {
+		SDL_Log("%s: %s", path, Mix_GetError());
+		return -1;
+	}
+	Mix_VolumeChunk(chunk, volume * MIX_MAX_VOLUME);
+	sounds[i].ptr = chunk;
+	return i;
+#else
+	(void)path, (void)volume;
+	return -1;
+#endif
+}
+
+bool LZR_PollEvent(LZR_Event *e)
+{
+	if (e == NULL) {
+		SDL_Log("e is NULL");
+		return false;
+	}
+	SDL_Event se;
+	while (SDL_PollEvent(&se)) {
+		switch (se.type) {
+		case SDL_QUIT:
+			e->type = LZR_EVENT_QUIT;
+			should_quit = true;
+			return true;
+		case SDL_KEYDOWN: {
+			if (!config.disable_bind_menu &&
+			    se.key.keysym.scancode == SCODE_BIND_MENU)
+				_bind_menu();
+			if (se.key.keysym.scancode == SCODE_FULLSCREEN)
+				LZR_ToggleFullscreen();
+			const int b = _scode_to_button(se.key.keysym.scancode);
+			if (se.key.repeat || b < 0)
+				break;
+			e->type = LZR_EVENT_BUTTON_DOWN;
+			e->button = b;
+			input[b] = true;
+			return true;
+		}
+		case SDL_MOUSEBUTTONDOWN: {
+			e->type = LZR_EVENT_BUTTON_DOWN;
+			e->button = LZR_BUTTON_MOUSE_L + se.button.button - 1;
+			e->x = se.button.x, e->y = se.button.y;
+			LZR_ScreenTransform(&e->x, &e->y);
+			mouse_x = e->x, mouse_y = e->y;
+			if (e->button >= LZR_BUTTON_COUNT)
+				continue;
+			input[e->button] = true;
+			return true;
+		}
+		case SDL_KEYUP: {
+			const int b = _scode_to_button(se.key.keysym.scancode);
+			if (b < 0)
+				break;
+			e->type = LZR_EVENT_BUTTON_UP;
+			e->button = b;
+			input[b] = false;
+			return true;
+		}
+		case SDL_MOUSEBUTTONUP: {
+			e->type = LZR_EVENT_BUTTON_DOWN;
+			e->button = LZR_BUTTON_MOUSE_L + se.button.button - 1;
+			e->x = se.button.x, e->y = se.button.y;
+			LZR_ScreenTransform(&e->x, &e->y);
+			mouse_x = e->x, mouse_y = e->y;
+			if (e->button >= LZR_BUTTON_COUNT)
+				continue;
+			input[e->button] = false;
+			return true;
+		}
+		case SDL_MOUSEMOTION: {
+			e->type = LZR_EVENT_MOUSE_MOVE;
+			e->x = se.motion.x, e->y = se.motion.y;
+			LZR_ScreenTransform(&e->x, &e->y);
+			mouse_x = e->x, mouse_y = e->y;
+			return true;
+		}
+		default:
+			break;
+		}
+	}
+	return false;
+}
+
+void LZR_CycleEvents(void)
+{
+	LZR_Event e;
+	while (LZR_PollEvent(&e))
+		;
+}
+
+bool LZR_ButtonDown(LZR_Button btn)
+{
+	if (btn >= 0 && btn < LZR_BUTTON_COUNT)
+		return input[btn];
+	else
+		SDL_Log("%d button doesn't exist", btn);
+	return false;
+}
+
+void LZR_ButtonBind(LZR_Button btn, unsigned int code)
+{
+	if (btn < LZR_BUTTON_MOUSE_L && code != SCODE_BIND_MENU) {
+		map[btn] = code;
+		SDL_Log("bound key %s to button %u",
+		        SDL_GetScancodeName(map[btn]), btn);
+	} else
+		SDL_Log("button %u can't be remapped to key %s", btn,
+		        SDL_GetScancodeName(code));
+}
+
+int LZR_DrawBegin(void)
+{
+	if (config.target_fps > 0)
+		next_time += min_dt;
+	if (SDL_SetRenderTarget(renderer, target) < 0) {
+		SDL_Log("%s", SDL_GetError());
+		return -1;
+	}
+	SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
+	SDL_RenderClear(renderer);
+	return 0;
+}
+
+int LZR_DrawEnd(void)
+{
+	if (SDL_SetRenderTarget(renderer, NULL)) {
+		SDL_Log("%s", SDL_GetError());
+		return -1;
+	}
+	if (LZR_DrawClear()) {
+		SDL_Log("LZY_DrawClear failed");
+		return -1;
+	}
+	if (config.target_fps) {
+		const uint_least64_t cur_time = SDL_GetTicks64();
+		if (next_time <= cur_time)
+			next_time = cur_time;
+		else
+			SDL_Delay(next_time - cur_time);
+	}
+	int win_w, win_h;
+	SDL_GetWindowSize(window, &win_w, &win_h);
+	const int width = config.display_width * config.ratio;
+	const int height = config.display_height;
+	const int ratio_w = win_w / width;
+	const int ratio_h = win_h / height;
+	scale = (ratio_w <= ratio_h) ? ratio_w : ratio_h;
+	off_x = (win_w - width * scale) / 2;
+	off_y = (win_h - height * scale) / 2;
+	const SDL_Rect dest = {off_x, off_y, width * scale, height * scale};
+	if (SDL_RenderCopyEx(renderer, target, NULL, &dest, 0.0, NULL, 0) < 0) {
+		SDL_Log("%s", SDL_GetError());
+		return -1;
+	}
+	SDL_RenderPresent(renderer);
+	tick++;
+	return 0;
+}
+
+int LZR_DrawSetColor(float r, float g, float b)
+{
+	const unsigned int ur = (unsigned int)(r * 255) & 255;
+	const unsigned int ug = (unsigned int)(g * 255) & 255;
+	const unsigned int ub = (unsigned int)(b * 255) & 255;
+	if (SDL_SetRenderDrawColor(renderer, ur, ug, ub, 255) < 0) {
+		SDL_Log("%s", SDL_GetError());
+		return -1;
+	}
+	color[0] = ur, color[1] = ug, color[2] = ub;
+	return 0;
+}
+
+int LZR_DrawClear(void)
+{
+	if (SDL_RenderClear(renderer) < 0) {
+		SDL_Log("%s", SDL_GetError());
+		return -1;
+	}
+	return 0;
+}
+
+int LZR_DrawPoint(int x, int y)
+{
+	if (SDL_RenderDrawPoint(renderer, x, y) < 0) {
+		SDL_Log("%s", SDL_GetError());
+		return -1;
+	}
+	return 0;
+}
+
+int LZR_DrawPoints(int *x, int *y, int n)
+{
+
+	if (n > (int)(config.display_width * config.display_height)) {
+		SDL_Log("%d > %u", n,
+		        config.display_width * config.display_height);
+		return -1;
+	}
+	for (int i = 0; i < n; i++) {
+		points[i].x = x[i];
+		points[i].y = y[i];
+	}
+	if (SDL_RenderDrawPoints(renderer, points, n) < 0) {
+		SDL_Log("%s", SDL_GetError());
+		return -1;
+	}
+	return 0;
+}
+
+int LZR_DrawLine(int x0, int y0, int x1, int y1)
+{
+	if (SDL_RenderDrawLine(renderer, x0, y0, x1, y1) < 0) {
+		SDL_Log("%s", SDL_GetError());
+		return -1;
+	}
+	return 0;
+}
+
+int LZR_DrawRectangle(bool fill, int x, int y, int w, int h)
+{
+	SDL_Rect rect = {x, y, w, h};
+	if ((fill ? SDL_RenderFillRect : SDL_RenderDrawRect)(renderer, &rect)) {
+		SDL_Log("%s", SDL_GetError());
+		return -1;
+	}
+	return 0;
+}
+
+int LZR_DrawCircle(bool fill, int x, int y, int radius)
+{
+#ifdef LZR_ENABLE_GFX
+	if ((fill ? filledCircleRGBA : circleRGBA)(renderer, x, y, radius,
+	                                           UNPACKED_COLOR, 255) < 0) {
+		SDL_Log("%s", SDL_GetError());
+		return -1;
+	}
+	return 0;
+#else
+	(void)fill, (void)x, (void)y, (void)radius;
+	SDL_Log("LZR GFX module is disabled");
+	return -1;
+#endif
+}
+
+int LZR_DrawPolygon(bool fill, int *vx, int *vy, int n)
+{
+#ifdef LZR_ENABLE_GFX
+	if (n > 32) {
+		SDL_Log("%d > 32", n);
+		return -1;
+	}
+	Sint16 x[32], y[32];
+	for (int i = 0; i < n; i++)
+		x[i] = vx[i], y[i] = vy[i];
+	if ((fill ? filledPolygonRGBA : polygonRGBA)(renderer, x, y, n,
+	                                             UNPACKED_COLOR, 255) < 0) {
+		SDL_Log("%s", SDL_GetError());
+		return -1;
+	}
+	return 0;
+#else
+	(void)fill, (void)vx, (void)vy, (void)n;
+	SDL_Log("LZR GFX module is disabled");
+	return -1;
+#endif
+}
+
+int LZR_DrawImage(int id, int x, int y)
+{
+	if (id < 0) {
+		SDL_Log("id is negative");
+		return -1;
+	}
+	if (id >= LZR_MAX_IMAGES || images[id].tex == NULL) {
+		SDL_Log("no image with id %d", id);
+		return -1;
+	}
+	if (SDL_SetTextureColorMod(images[id].tex, UNPACKED_COLOR) < 0) {
+		SDL_Log("%s", SDL_GetError());
+		return -1;
+	}
+	const SDL_Rect dest = {x, y, images[id].width, images[id].height};
+	if (SDL_RenderCopy(renderer, images[id].tex, NULL, &dest) < 0) {
+		SDL_Log("%s", SDL_GetError());
+		return -1;
+	}
+	return 0;
+}
+
+int LZR_DrawImageEx(int id, int x, int y, LZR_ImageDrawSettings stg)
+{
+	if (id < 0) {
+		SDL_Log("id is negative");
+		return -1;
+	}
+	if (id >= LZR_MAX_IMAGES || images[id].tex == NULL) {
+		SDL_Log("no image with id %d", id);
+		return -1;
+	}
+	const int width = (stg.width > 0) ? stg.width : images[id].width;
+	const int height = (stg.height > 0) ? stg.height : images[id].height;
+	if (stg.center) {
+		x -= stg.scale_x * width / 2;
+		y -= stg.scale_y * height / 2;
+	}
+	SDL_Rect src = {stg.ix, stg.iy, width, height};
+	SDL_Rect dst = {x, y, width * stg.scale_x, height * stg.scale_y};
+	if (stg.ix < 0) {
+		src.w += stg.ix;
+		dst.x = 0 - stg.ix;
+		dst.w += stg.ix;
+	}
+	if (stg.iy < 0) {
+		src.y = 0 - stg.iy;
+		src.h += stg.iy;
+		dst.y -= stg.iy;
+		dst.h += stg.iy;
+	}
+	if (stg.ix + width > images[id].width) {
+		src.w = images[id].width - stg.ix;
+		dst.w = images[id].width - stg.ix;
+	}
+	if (stg.iy + height > images[id].height) {
+		src.h = images[id].height - stg.iy;
+		dst.h = images[id].height - stg.iy;
+	}
+	if (SDL_SetTextureColorMod(images[id].tex, UNPACKED_COLOR) < 0) {
+		SDL_Log("%s", SDL_GetError());
+		return -1;
+	}
+	const int flip = (stg.flip_v ? SDL_FLIP_VERTICAL : 0) |
+	                 (stg.flip_h ? SDL_FLIP_HORIZONTAL : 0);
+	if (SDL_RenderCopyEx(renderer, images[id].tex, &src, &dst,
+	                     stg.angle * 360.0, NULL, flip)) {
+		SDL_Log("%s", SDL_GetError());
+		return -1;
+	}
+	return 0;
+}
+
+int LZR_DrawTile(int id, int tile, int x, int y, double rot, int flip)
+{
+	if (id < 0) {
+		SDL_Log("id is negative");
+		return -1;
+	}
+	if (id >= LZR_MAX_IMAGES || images[id].tex == NULL) {
+		SDL_Log("no image with id %d", id);
+		return -1;
+	}
+	if (tile < 0) {
+		SDL_Log("tile is negative");
+		return -1;
+	}
+	const int img_width = images[id].width / config.tile_size;
+	const int img_height = images[id].height / config.tile_size;
+	if (tile >= img_width * img_height) {
+		SDL_Log("tile exceeds boundaries");
+		return -1;
+	}
+	if (SDL_SetTextureColorMod(images[id].tex, UNPACKED_COLOR) < 0) {
+		SDL_Log("%s", SDL_GetError());
+		return -1;
+	}
+	SDL_Rect src;
+	src.x = (tile % img_width) * config.tile_size;
+	src.y = (tile / img_width) * config.tile_size;
+	src.w = config.tile_size, src.h = config.tile_size;
+	const SDL_Rect dst = {x, y, config.tile_size, config.tile_size};
+	if (SDL_RenderCopyEx(renderer, images[id].tex, &src, &dst, rot, NULL,
+	                     flip) < 0) {
+		SDL_Log("%s", SDL_GetError());
+		return -1;
+	}
+	return 0;
+}
+
+int LZR_PlaySound(int id)
+{
+#ifdef LZR_ENABLE_MIXER
+	if (id < 0) {
+		SDL_Log("id is negative");
+		return -1;
+	}
+	if (id >= LZR_MAX_SOUNDS || sounds[id].ptr == NULL) {
+		SDL_Log("no sound with id %d", id);
+		return -1;
+	}
+	if (Mix_PlayChannel(-1, sounds[id].ptr, 0) < 0) {
+		SDL_Log("%s", Mix_GetError());
+		return -1;
+	}
+	return 0;
+#else
+	(void)id;
+	SDL_Log("LZR MIXER module is disabled");
+	return -1;
+#endif
+}
+
+int LZR_SetMusicVolume(float volume)
+{
+#ifdef LZR_ENABLE_MIXER
+	if (Mix_VolumeMusic(volume * MIX_MAX_VOLUME) < 0) {
+		SDL_Log("%s", Mix_GetError());
+		return -1;
+	}
+	return 0;
+#else
+	(void)volume;
+	SDL_Log("LZR MIXER module is disabled");
+	return -1;
+#endif
+}
+
+int LZR_PlayMusic(const char *path, int loops)
+{
+#ifdef LZR_ENABLE_MIXER
+	LZR_StopMusic();
+	char *const apath = LZR_PathPrefix(path);
+	if (apath == NULL) {
+		SDL_Log("LZR_PathPrefix failed");
+		return -1;
+	}
+	music = Mix_LoadMUS(apath);
+	free(apath);
+	if (music == NULL) {
+		SDL_Log("%s: %s", path, Mix_GetError());
+		return -1;
+	}
+	if (Mix_PlayMusic(music, loops) < 0) {
+		SDL_Log("%s", Mix_GetError());
+		return -1;
+	}
+	Mix_RewindMusic();
+	return 0;
+#else
+	(void)path, (void)loops;
+	SDL_Log("LZR MIXER module is disabled");
+	return -1;
+#endif
+}
+
+void LZR_StopMusic(void)
+{
+#ifdef LZR_ENABLE_MIXER
+	if (Mix_PlayingMusic())
+		Mix_HaltMusic();
+	if (music != NULL) {
+		Mix_FreeMusic(music);
+		music = NULL;
+	}
+#endif
+}
+
+void LZR_ToggleFullscreen(void)
+{
+	static int fullscreen = 0;
+	fullscreen = !fullscreen;
+	SDL_SetWindowFullscreen(window,
+	                        fullscreen * SDL_WINDOW_FULLSCREEN_DESKTOP);
+}
+
+uint64_t LZR_GetTick(void)
+{
+	return tick;
+}
+
+void LZR_ScreenTransform(int *x, int *y)
+{
+	if (scale == 0.0)
+		return;
+	if (x != NULL) {
+		*x -= off_x;
+		*x /= scale;
+	}
+	if (y != NULL) {
+		*y -= off_y;
+		*y /= scale;
+	}
+}
+
+void LZR_MousePosition(int *x, int *y)
+{
+	if (x != NULL)
+		*x = mouse_x;
+	if (y != NULL)
+		*y = mouse_y;
+}
+
+/*
+** Copyright (c) 2022, 2023 kdx
+**
+** Permission is hereby granted, free of charge, to any person obtaining a copy
+** of this software and associated documentation files (the "Software"), to
+** deal in the Software without restriction, including without limitation the
+** rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+** sell copies of the Software, and to permit persons to whom the Software is
+** furnished to do so, subject to the following conditions:
+**
+** The above copyright notice and this permission notice shall be included in
+** all copies or substantial portions of the Software.
+**
+** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+** IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+** FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+** AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+** LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+** FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+** IN THE SOFTWARE.
+*/
diff --git a/lzr.h b/lzr.h
new file mode 100644
index 0000000..220d13e
--- /dev/null
+++ b/lzr.h
@@ -0,0 +1,129 @@
+/* Licensing informations can be found at the end of the file. */
+#pragma once
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#ifndef LZR_DISABLE_IMAGE
+#	define LZR_ENABLE_IMAGE
+#endif
+#ifndef LZR_DISABLE_MIXER
+#	define LZR_ENABLE_MIXER
+#endif
+#ifndef LZR_DISABLE_GFX
+#	define LZR_ENABLE_GFX
+#endif
+
+/* devmode tracks and autoreloads ressources on change */
+#ifndef LZR_DISABLE_DEVMODE
+#	define LZR_ENABLE_DEVMODE
+#endif
+
+#define LZR_MAX_IMAGES  32
+#define LZR_MAX_SOUNDS  64
+#define LZR_BUTTON(btn) LZR_ButtonDown(LZR_BUTTON_##btn)
+#define LZR_IMAGE(img)  LZR_ImageLoad(img)
+
+typedef struct LZR_Config {
+	unsigned int display_width;
+	unsigned int display_height;
+	unsigned int target_fps;
+	unsigned int tile_size;
+	const char *title;
+	double ratio;
+	bool disable_bind_menu;
+	bool hide_cursor;
+} LZR_Config;
+
+typedef enum LZR_EventType {
+	LZR_EVENT_QUIT,
+	LZR_EVENT_BUTTON_DOWN,
+	LZR_EVENT_BUTTON_UP,
+	LZR_EVENT_MOUSE_MOVE
+} LZR_EventType;
+
+typedef enum LZR_Button {
+	LZR_BUTTON_LEFT,
+	LZR_BUTTON_RIGHT,
+	LZR_BUTTON_UP,
+	LZR_BUTTON_DOWN,
+	LZR_BUTTON_O,
+	LZR_BUTTON_X,
+	LZR_BUTTON_MOUSE_L,
+	LZR_BUTTON_MOUSE_M,
+	LZR_BUTTON_MOUSE_R,
+	LZR_BUTTON_COUNT
+} LZR_Button;
+
+typedef struct LZR_Event {
+	LZR_EventType type;
+	LZR_Button button;
+	int x, y;
+} LZR_Event;
+
+typedef struct LZR_ImageDrawSettings {
+	int ix, iy, width, height;
+	double scale_x, scale_y, angle;
+	bool center, flip_h, flip_v;
+} LZR_ImageDrawSettings;
+
+int LZR_Init(LZR_Config cfg);
+void LZR_Quit(void);
+bool LZR_ShouldQuit(void);
+bool LZR_PollEvent(LZR_Event *e);
+void LZR_CycleEvents(void);
+bool LZR_ButtonDown(LZR_Button btn);
+void LZR_ButtonBind(LZR_Button btn, unsigned int code);
+char *LZR_PathPrefix(const char *path);
+int LZR_ImageLoad(const char *path);
+int LZR_SoundLoad(const char *path, float volume);
+int LZR_DrawBegin(void);
+int LZR_DrawEnd(void);
+int LZR_DrawSetColor(float r, float g, float b);
+int LZR_DrawClear(void);
+int LZR_DrawPoint(int x, int y);
+int LZR_DrawPoints(int *x, int *y, int n);
+int LZR_DrawLine(int x0, int y0, int x1, int y1);
+int LZR_DrawRectangle(bool fill, int x, int y, int w, int h);
+int LZR_DrawCircle(bool fill, int x, int y, int radius);
+int LZR_DrawPolygon(bool fill, int *vx, int *vy, int n);
+int LZR_DrawImage(int id, int x, int y);
+int LZR_DrawImageEx(int id, int x, int y, LZR_ImageDrawSettings stg);
+int LZR_DrawTile(int id, int tile, int x, int y, double rot, int flip);
+int LZR_PlaySound(int id);
+int LZR_SetMusicVolume(float volume);
+int LZR_PlayMusic(const char *path, int loops);
+void LZR_StopMusic(void);
+void LZR_ToggleFullscreen(void);
+uint64_t LZR_GetTick(void);
+void LZR_ScreenTransform(int *x, int *y);
+void LZR_MousePosition(int *x, int *y);
+
+#ifdef __cplusplus
+}
+#endif
+
+/*
+** Copyright (c) 2022, 2023 kdx
+**
+** Permission is hereby granted, free of charge, to any person obtaining a copy
+** of this software and associated documentation files (the "Software"), to
+** deal in the Software without restriction, including without limitation the
+** rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+** sell copies of the Software, and to permit persons to whom the Software is
+** furnished to do so, subject to the following conditions:
+**
+** The above copyright notice and this permission notice shall be included in
+** all copies or substantial portions of the Software.
+**
+** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+** IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+** FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+** AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+** LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+** FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+** IN THE SOFTWARE.
+*/
diff --git a/main.c b/main.c
new file mode 100644
index 0000000..a8cd2d0
--- /dev/null
+++ b/main.c
@@ -0,0 +1,69 @@
+#include "lzr.h"
+#include "cfg.h"
+#include "input.h"
+#include <math.h>
+#include <stdio.h>
+
+#define PAGES 8
+
+int main(int argc, char **argv)
+{
+	(void)argc, (void)argv;
+	if (LZR_Init(cfg))
+		return LZR_Quit(), 1;
+	int pages[PAGES] = {
+		LZR_IMAGE("res/0.bmp"),
+		LZR_IMAGE("res/1.bmp"),
+		LZR_IMAGE("res/2.bmp"),
+		LZR_IMAGE("res/3.bmp"),
+		LZR_IMAGE("res/4.bmp"),
+		LZR_IMAGE("res/5.bmp"),
+		LZR_IMAGE("res/6.bmp"),
+		LZR_IMAGE("res/7.bmp"),
+	};
+	for (int i = 0; i < PAGES; i++)
+		if (pages[i] < 0)
+			return LZR_Quit(), 1;
+	LZR_ImageDrawSettings stg = {
+		.ix = 0,
+		.iy = 0,
+		.width = -1,
+		.height = -1,
+		.scale_x = 1.0,
+		.scale_y = 1.0,
+		.angle = 0.0,
+		.center = false,
+		.flip_h = false,
+		.flip_v = false
+	};
+	int page = 0;
+	while (!LZR_ShouldQuit()) {
+		const float color = 1.0 - fabs(sin((float)LZR_GetTick() / 16));
+		LZR_CycleEvents();
+		input_update();
+		if (input_pressed(K_LEFT) && page > 0)
+			page -= 1;
+		if (input_pressed(K_RIGHT) && page < 4)
+			page += 1;
+		LZR_DrawBegin();
+		//LZR_DrawSetColor(color, 1.0 - color, color);
+		LZR_DrawSetColor(0, 0, 0);
+		LZR_DrawClear();
+		LZR_DrawSetColor(1.0 - color, color, 1.0 - color);
+		if (page > 0)
+			LZR_DrawImageEx(pages[page * 2 - 1],
+			                0,
+			                (CFG_DHEIGHT - 595) / 2,
+			                stg);
+		if (page < 4)
+			LZR_DrawImageEx(pages[page * 2],
+			                CFG_DWIDTH - 421,
+			                (CFG_DHEIGHT - 595) / 2,
+			                stg);
+		//LZR_DrawSetColor(color, 1.0 - color, color);
+		LZR_DrawSetColor(0, 0, 0);
+		LZR_DrawEnd();
+	}
+	LZR_Quit();
+	return 0;
+}
diff --git a/res/0.bmp b/res/0.bmp
new file mode 100644
index 0000000..f6021f7
--- /dev/null
+++ b/res/0.bmp
diff --git a/res/1.bmp b/res/1.bmp
new file mode 100644
index 0000000..5c45822
--- /dev/null
+++ b/res/1.bmp
diff --git a/res/2.bmp b/res/2.bmp
new file mode 100644
index 0000000..85312c1
--- /dev/null
+++ b/res/2.bmp
diff --git a/res/3.bmp b/res/3.bmp
new file mode 100644
index 0000000..2d70053
--- /dev/null
+++ b/res/3.bmp
diff --git a/res/4.bmp b/res/4.bmp
new file mode 100644
index 0000000..c1f03cd
--- /dev/null
+++ b/res/4.bmp
diff --git a/res/5.bmp b/res/5.bmp
new file mode 100644
index 0000000..463e990
--- /dev/null
+++ b/res/5.bmp
diff --git a/res/6.bmp b/res/6.bmp
new file mode 100644
index 0000000..6f051a0
--- /dev/null
+++ b/res/6.bmp
diff --git a/res/7.bmp b/res/7.bmp
new file mode 100644
index 0000000..92b88f5
--- /dev/null
+++ b/res/7.bmp