Fixes #37 and #39 Adds tooltips to everything

- A tooltip on first play will explain how it works
- A tooltip on levelup will display skill info
- A setting is introduced to disable tooltips

CMakeLists.txt

@@ -178,6 +178,7 @@ add_executable(breakhack
 	src/hiscore
 	src/object
 	src/gui_util
+	src/tooltip
 	)
 
 # Sqlite has some warnings that I we don't need to see

src/gui.c

@@ -27,6 +27,7 @@
 #include "map.h"
 #include "texturecache.h"
 #include "gui_util.h"
+#include "tooltip.h"
 
 #define DEFAULT_LOG { NULL, LOG_LINES_COUNT, 0, 200 }
 #define DEFAULT_EVENT_MESSAGES { NULL, 5, 0, 200 }
@@ -41,7 +42,7 @@ static struct LogData_t {
 	unsigned int strlen;
 } log_data = DEFAULT_LOG;
 
-static struct GuiEventMsgData_t {
+static struct GuiEventMsgs {
 	char **messages;
 	unsigned int len;
 	unsigned int count;
@@ -180,6 +181,7 @@ gui_create(Camera *cam)
 	gui->sprites = linkedlist_create();
 	gui->health = linkedlist_create();
 	gui->xp_bar = linkedlist_create();
+	gui->activeTooltip = NULL;
 
 	for (i = 0; i < LOG_LINES_COUNT; ++i) {
 		t = texture_create();
@@ -464,6 +466,14 @@ gui_event_message(const char *fmt, ...)
 	event_messages.count++;
 }
 
+void
+gui_render_tooltip(Gui *gui, Camera *cam)
+{
+	if (gui->activeTooltip) {
+		sprite_render(gui->activeTooltip, cam);
+	}
+}
+
 void
 gui_render_log(Gui *gui, Camera *cam)
 {
@@ -520,8 +530,9 @@ gui_render_event_message(Gui *gui, Camera *cam)
 void
 gui_clear_message_log(void)
 {
-	for (size_t i = 0; i < event_messages.count; ++i)
+	for (size_t i = 0; i < event_messages.count; ++i) {
 		free(event_messages.messages[i]);
+	}
 	event_messages.count = 0;
 
 	for (size_t i = 0; i < log_data.count; ++i)
@@ -549,8 +560,9 @@ destroy_event_messages(void)
 	if (event_messages.messages == NULL)
 		return;
 
-	for (unsigned int i = 0; i < event_messages.count; ++i)
+	for (unsigned int i = 0; i < event_messages.count; ++i) {
 		free(event_messages.messages[i]);
+	}
 	
 	free(event_messages.messages);
 	event_messages.messages = NULL;

src/gui.h

@@ -42,13 +42,14 @@ typedef enum Label_e {
 	LABEL_COUNT
 } LabelIndex;
 
-typedef struct {
+typedef struct Gui {
 	LinkedList *sprites;
 	LinkedList *health;
 	LinkedList *xp_bar;
 	Sprite *bottomFrame;
 	Sprite *rightFrame;
 	Sprite *labels[LABEL_COUNT];
+	Sprite *activeTooltip;
 	Texture *log_lines[LOG_LINES_COUNT];
 	Texture *event_message;
 	Timer *event_message_timer;
@@ -69,6 +70,9 @@ gui_render_log(Gui*, Camera*);
 void
 gui_render_event_message(Gui*, Camera*);
 
+void
+gui_render_tooltip(Gui*, Camera*);
+
 void
 gui_log(const char *fmt, ...);
 

src/gui_util.c

@@ -19,19 +19,10 @@
 #include "texturecache.h"
 #include "gui_util.h"
 
-static SDL_Rect frame_top_left		= { 16, 160, 16, 16 };
+static Sprite *
-static SDL_Rect frame_top_right		= { 48, 160, 16, 16 };
+render_frame_on_texture(Uint32 width,
-static SDL_Rect frame_bottom_left	= { 16, 192, 16, 16 };
-static SDL_Rect frame_bottom_right	= { 48, 192, 16, 16 };
-static SDL_Rect frame_top		= { 32, 160, 16, 16 };
-static SDL_Rect frame_bottom		= { 32, 192, 16, 16 };
-static SDL_Rect frame_center		= { 32, 176, 16, 16 };
-static SDL_Rect frame_left		= { 16, 176, 16, 16 };
-static SDL_Rect frame_right		= { 48, 176, 16, 16 };
-
-Sprite *
-gui_util_create_frame_sprite(Uint32 width,
 			Uint32 height,
+			Position offset,
 			Camera *cam)
 {
 	Sprite *frame = sprite_create();
@@ -48,11 +39,21 @@ gui_util_create_frame_sprite(Uint32 width,
 	texture_create_blank(texture,
 			     SDL_TEXTUREACCESS_TARGET,
 			     cam->renderer);
-	Texture *source = texturecache_get("GUI/GUI0.png");
 
 	SDL_SetRenderTarget(cam->renderer, texture->texture);
 	SDL_RenderClear(cam->renderer);
 
+	SDL_Rect frame_top_left		= CLIP16(offset.x, offset.y);
+	SDL_Rect frame_top_right	= CLIP16(offset.x + 32, offset.y);
+	SDL_Rect frame_bottom_left	= CLIP16(offset.x, offset.y + 32);
+	SDL_Rect frame_bottom_right	= CLIP16(offset.x + 32, offset.y + 32);
+	SDL_Rect frame_top		= CLIP16(offset.x + 16, offset.y);
+	SDL_Rect frame_bottom		= CLIP16(offset.x + 16, offset.y + 32);
+	SDL_Rect frame_center		= CLIP16(offset.x + 16, offset.y + 16);
+	SDL_Rect frame_left		= CLIP16(offset.x, offset.y + 16);
+	SDL_Rect frame_right		= CLIP16(offset.x + 32, offset.y + 16);
+
+	Texture *source = texturecache_get("GUI/GUI0.png");
 	SDL_Rect box = { 0, 0, 16, 16 };
 	unsigned int i, j;
 	for (i = 0; i < width; ++i) {
@@ -108,6 +109,24 @@ gui_util_create_frame_sprite(Uint32 width,
 			}
 		}
 	}
+
 	SDL_SetRenderTarget(cam->renderer, NULL);
+
 	return frame;
 }
+
+Sprite *
+gui_util_create_frame_sprite(Uint32 width,
+			     Uint32 height,
+			     Camera *cam)
+{
+	return render_frame_on_texture(width, height, POS(16, 16*10), cam);
+}
+
+Sprite *
+gui_util_create_tooltip_frame_sprite(Uint32 width,
+				     Uint32 height,
+				     Camera *cam)
+{
+	return render_frame_on_texture(width, height, POS(16*13, 16*13), cam);
+}

src/gui_util.h

@@ -25,3 +25,8 @@ Sprite *
 gui_util_create_frame_sprite(Uint32 width,
 							 Uint32 height,
 							 Camera*);
+
+Sprite *
+gui_util_create_tooltip_frame_sprite(Uint32 width,
+									 Uint32 height,
+									 Camera*);

src/input.c

@@ -107,6 +107,21 @@ get_event_modkey(SDL_Event *event)
 				key = KEY_CTRL_S; break;
 			case SDLK_m:
 				key = KEY_CTRL_M; break;
+			case SDLK_d:
+				key = KEY_CTRL_D; break;
+		}
+	} else if (event->key.keysym.mod & (KMOD_LSHIFT | KMOD_RSHIFT)) {
+		switch (event->key.keysym.sym) {
+			case SDLK_1:
+				key = KEY_SHIFT_NUM1; break;
+			case SDLK_2:
+				key = KEY_SHIFT_NUM2; break;
+			case SDLK_3:
+				key = KEY_SHIFT_NUM3; break;
+			case SDLK_4:
+				key = KEY_SHIFT_NUM4; break;
+			case SDLK_5:
+				key = KEY_SHIFT_NUM5; break;
 			default:
 				key = 0; break;
 		}

src/input.h

@@ -39,8 +39,14 @@
 #define KEY_ESC		16384
 #define KEY_ENTER	32768
 
-#define KEY_CTRL_M		1
+#define KEY_CTRL_M		0x1
-#define KEY_CTRL_S		2
+#define KEY_CTRL_S		0x2
+#define KEY_CTRL_D		0x4
+#define KEY_SHIFT_NUM1	0x8
+#define KEY_SHIFT_NUM2	0x10
+#define KEY_SHIFT_NUM3	0x20
+#define KEY_SHIFT_NUM4	0x40
+#define KEY_SHIFT_NUM5	0x80
 
 #define MBUTTON_LEFT	1
 #define MBUTTON_MIDDLE	2

src/main.c

@@ -52,6 +52,55 @@
 #include "screen.h"
 #include "hiscore.h"
 #include "io_util.h"
+#include "tooltip.h"
+
+static char *skills_tooltip[] = {
+	"CONGRATULATIONS!",
+	"",
+	"   You have aquired a new skill!",
+	"",
+	"   Skills are listed in the bar below the game screen.",
+	"",
+	"",
+	"   SKILL INFO:            CTRL + <NUM>",
+	"                          Where <NUM> is the skill number (1-5)",
+	"",
+	"   DISABLE TOOLTIPS:      CTRL + D",
+	"",
+	"",
+	"Press ESC to close",
+	NULL
+};
+
+static char *how_to_play_tooltip[] = {
+	"HOW TO PLAY",
+	"",
+	"   NAVIGATION:     Use ARROWS or WASD or HJKL to move",
+	"",
+	"   ATTACK:         Walk into a monster to attack it",
+	"",
+	"   THROW DAGGER:   Press 4 then chose a direction (navigation keys)",
+	"",
+	"   DRINK HEALTH:   Press 5 (if you need health and have potions)",
+	"",
+	"   TOGGLE MUSIC:   CTRL + M",
+	"",
+	"   TOGGLE SOUND:   CTRL + S",
+	"",
+	"   TOGGLE MENU:    ESC",
+	"",
+	"   Your stats and inventory are listed in the right panel",
+	"",
+	"",
+	"   GOOD LUCK!",
+	"   May your death be quick and painless...",
+	"",
+	"",
+	"",
+	"Press ESC to close",
+	NULL
+};
+
 
 typedef enum Turn_t {
 	PLAYER,
@@ -72,6 +121,8 @@ static Timer		*menuTimer	= NULL;
 static Camera		*gCamera		= NULL;
 static Screen		*creditsScreen		= NULL;
 static Screen		*scoreScreen		= NULL;
+static Sprite		*new_skill_tooltip	= NULL;
+static Sprite		*howto_tooltip		= NULL;
 static unsigned int	cLevel			= 1;
 static float		deltaTime		= 1.0;
 static double		renderScale		= 1.0;
@@ -218,12 +269,17 @@ startGame(void *unused)
 	gGameState = PLAYING;
 	if (gPlayer)
 		player_destroy(gPlayer);
-	gPlayer = player_create(WARRIOR, gRenderer);
+	gPlayer = player_create(WARRIOR, gCamera);
 	mixer_play_music(GAME_MUSIC0 + get_random(2));
 	resetGame();
 	gui_clear_message_log();
 	gui_log("The Dungeon Crawl begins!");
 	gui_event_message("Welcome to the dungeon!");
+
+	Settings *settings = settings_get();
+	if (!settings->howto_tooltip_shown)
+		gGui->activeTooltip = howto_tooltip;
+	settings->howto_tooltip_shown = true;
 }
 
 static void
@@ -249,6 +305,7 @@ static void
 goToMainMenu(void *unused)
 {
 	UNUSED(unused);
+	gui_clear_message_log();
 	gGameState = MENU;
 	menu_destroy(inGameMenu);
 	inGameMenu = NULL;
@@ -291,16 +348,25 @@ createMenu(Menu **menu, struct MENU_ITEM menu_items[], unsigned int size)
 	}
 }
 
+static void
+showHowToTooltip(void *unused)
+{
+	UNUSED(unused);
+	toggleInGameMenu(NULL);
+	gGui->activeTooltip = howto_tooltip;
+}
+
 static void
 initInGameMenu(void)
 {
 	struct MENU_ITEM menu_items[] = {
 		{ "RESUME", toggleInGameMenu },
+		{ "HOW TO PLAY", showHowToTooltip },
 		{ "MAIN MENU", goToMainMenu },
 		{ "QUIT", exitGame },
 	};
 
-	createMenu(&inGameMenu, menu_items, 3);
+	createMenu(&inGameMenu, menu_items, 4);
 }
 
 static void
@@ -412,6 +478,9 @@ init(void)
 	hiscore_init();
 	initMainMenu();
 
+	howto_tooltip = tooltip_create(how_to_play_tooltip, gCamera);
+	new_skill_tooltip = tooltip_create(skills_tooltip, gCamera);
+
 	gCamera->pos = (Position) { 0, 0 };
 
 	gGameState = MENU;
@@ -426,7 +495,7 @@ handle_main_input(void)
 		|| gGameState == IN_GAME_MENU
 		|| gGameState == GAME_OVER)
 	{
-		if (input_key_is_pressed(&input, KEY_ESC))
+		if (!gGui->activeTooltip && input_key_is_pressed(&input, KEY_ESC))
 			toggleInGameMenu(NULL);
 	}
 
@@ -436,6 +505,8 @@ handle_main_input(void)
 		gGameState = MENU;
 	else if (gGameState == MENU && input_key_is_pressed(&input, KEY_ESC))
 		gGameState = QUIT;
+	else if (gGui->activeTooltip && input_key_is_pressed(&input, KEY_ESC))
+		gGui->activeTooltip = NULL;
 
 	if (input_modkey_is_pressed(&input, KEY_CTRL_M)) {
 		if (mixer_toggle_music(&gGameState))
@@ -450,6 +521,15 @@ handle_main_input(void)
 		else
 			gui_log("Sound disabled");
 	}
+
+	if (input_modkey_is_pressed(&input, KEY_CTRL_D)) {
+		Settings *s = settings_get();
+		s->tooltips_enabled = !s->tooltips_enabled;
+		if (s->tooltips_enabled)
+			gui_log("Tooltips enabled");
+		else
+			gui_log("Tooltips disabled");
+	}
 }
 
 static bool
@@ -518,6 +598,7 @@ populateUpdateData(UpdateData *data, float deltatime)
 	data->map = gMap;
 	data->matrix = gRoomMatrix;
 	data->input = &input;
+	data->gui = gGui;
 	data->deltatime = deltatime;
 }
 
@@ -531,9 +612,14 @@ run_game_update(void)
 		menu_update(inGameMenu, &input);
 
 	populateUpdateData(&updateData, deltaTime);
+	bool skillActivated = false;
 	if (playerLevel != gPlayer->stats.lvl) {
 		playerLevel = gPlayer->stats.lvl;
-		skillbar_check_skill_activation(gSkillBar, gPlayer);
+		skillActivated = skillbar_check_skill_activation(gSkillBar,
+								 gPlayer);
+	}
+	if (skillActivated && settings_get()->tooltips_enabled && playerLevel < 5) {
+		gGui->activeTooltip = new_skill_tooltip;
 	}
 
 	map_clear_expired_entities(gMap, gPlayer);
@@ -601,6 +687,7 @@ run_game_render(void)
 
 	SDL_RenderSetViewport(gRenderer, NULL);
 	particle_engine_render_global(gCamera);
+	gui_render_tooltip(gGui, gCamera);
 
 	if (gGameState == IN_GAME_MENU) {
 		SDL_Rect dimmer = { 0, 0, SCREEN_WIDTH, SCREEN_HEIGHT };
@@ -630,7 +717,6 @@ run_game(void)
 			gui_event_message("NEW HIGHSCORE");
 			gui_log("NEW HIGHSCORE");
 		}
-		gui_event_message("Press ESC to open menu");
 		mixer_play_effect(SPLAT);
 		gGameState = GAME_OVER;
 		createInGameGameOverMenu();
@@ -750,6 +836,8 @@ void close(void)
 	if (inGameMenu)
 		menu_destroy(inGameMenu);
 
+	sprite_destroy(howto_tooltip);
+	sprite_destroy(new_skill_tooltip);
 	camera_destroy(gCamera);
 	roommatrix_destroy(gRoomMatrix);
 	gui_destroy(gGui);

src/player.c

@@ -428,7 +428,7 @@ build_sword_animation(Player *p, SDL_Renderer *renderer)
 }
 
 Player* 
-player_create(class_t class, SDL_Renderer *renderer)
+player_create(class_t class, Camera *cam)
 {
 	Player *player = malloc(sizeof(Player));
 	player->sprite = sprite_create();
@@ -451,7 +451,7 @@ player_create(class_t class, SDL_Renderer *renderer)
 	player->animationTimer		= timer_create();
 	player->swordAnimation		= animation_create(5);
 
-	build_sword_animation(player, renderer);
+	build_sword_animation(player, cam->renderer);
 
 	memset(&player->skills,
 	       0, PLAYER_SKILL_COUNT * sizeof(Skill*));
@@ -480,16 +480,16 @@ player_create(class_t class, SDL_Renderer *renderer)
 		case WARRIOR:
 			m_strcpy(asset, 100, "Commissions/Warrior.png");
 			player->stats = (Stats) WARRIOR_STATS;
-			player->skills[0] = skill_create(FLURRY);
+			player->skills[0] = skill_create(FLURRY, cam);
-			player->skills[1] = skill_create(BASH);
+			player->skills[1] = skill_create(BASH, cam);
-			player->skills[2] = skill_create(CHARGE);
+			player->skills[2] = skill_create(CHARGE, cam);
-			player->skills[3] = skill_create(DAGGER_THROW);
+			player->skills[3] = skill_create(DAGGER_THROW, cam);
 			break;
 	}
 
-	player->skills[4] = skill_create(SIP_HEALTH);
+	player->skills[4] = skill_create(SIP_HEALTH, cam);
 
-	sprite_load_texture(player->sprite, asset, 0, renderer);
+	sprite_load_texture(player->sprite, asset, 0, cam->renderer);
 	player->sprite->pos = (Position) { TILE_DIMENSION, TILE_DIMENSION };
 	player->sprite->dim = GAME_DIMENSION;
 	player->sprite->clip = (SDL_Rect) { 0, 0, 16, 16 };

src/player.h

@@ -79,7 +79,7 @@ typedef struct Player {
 } Player;
 
 Player*
-player_create(class_t, SDL_Renderer*);
+player_create(class_t, Camera*);
 
 ExperienceData
 player_get_xp_data(Player*);

src/position.h

@@ -21,6 +21,8 @@
 
 #include <stdbool.h>
 
+#define POS(x, y) (Position) { x, y }
+
 typedef struct {
 	int x;
 	int y;

src/settings.c

@@ -29,6 +29,8 @@ static Settings settings;
 
 static const char *KEY_MUSIC_ENABLED		= "music_enabled";
 static const char *KEY_SOUND_ENABLED		= "sound_enabled";
+static const char *KEY_TOOLTIPS_ENABLED		= "tooltips_enabled";
+static const char *KEY_HOW_TO_PLAY_SHOWN	= "how_to_play_shown";
 
 static
 DbQuery MIGRATE_COMMANDS[] = {
@@ -49,6 +51,8 @@ set_default_settings(void)
 {
 	settings.music_enabled = true;
 	settings.sound_enabled = true;
+	settings.tooltips_enabled = true;
+	settings.howto_tooltip_shown = false;
 }
 
 static void
@@ -82,6 +86,14 @@ load_settings_cb(void *unused, int count, char **values, char **colNames)
 			settings.music_enabled = (bool)atoi(values[i + 1]);
 			i += 2;
 		}
+		else if (!strcmp(KEY_HOW_TO_PLAY_SHOWN, values[i])) {
+			settings.howto_tooltip_shown = (bool)atoi(values[i + 1]);
+			i += 2;
+		}
+		else if (!strcmp(KEY_TOOLTIPS_ENABLED, values[i])) {
+			settings.tooltips_enabled = (bool)atoi(values[i + 1]);
+			i += 2;
+		}
 	}
 	return 0;
 }
@@ -127,6 +139,8 @@ settings_save(void)
 {
 	save_setting_int(KEY_SOUND_ENABLED, settings.sound_enabled);
 	save_setting_int(KEY_MUSIC_ENABLED, settings.music_enabled);
+	save_setting_int(KEY_TOOLTIPS_ENABLED, settings.tooltips_enabled);
+	save_setting_int(KEY_HOW_TO_PLAY_SHOWN, settings.howto_tooltip_shown);
 }
 
 Settings *

src/settings.h

@@ -24,6 +24,8 @@
 typedef struct Settings {
 	bool music_enabled;
 	bool sound_enabled;
+	bool tooltips_enabled;
+	bool howto_tooltip_shown;
 } Settings;
 
 void

src/skill.c

@@ -35,6 +35,106 @@
 #include "animation.h"
 #include "artifact.h"
 #include "trap.h"
+#include "tooltip.h"
+
+static char *flurry_tooltip[] = {
+	"FLURRY",
+	"",
+	"   Hits an adjecant enemy with a flurry of three strikes.",
+	"   Each strike has the same odds of hitting as a regular attack",
+	"",
+	"COOLDOWN:",
+	"   5 turns",
+	"",
+	"USAGE:",
+	"   activate the skill (press 1)",
+	"   followed by a direction (left, right, up or down)",
+	"",
+	"",
+	"Press ESC to close",
+	NULL
+};
+
+static char *bash_tooltip[] = {
+	"BASH",
+	"",
+	"   Bashes an adjecant enemy with your shield",
+	"   On a successful hit the target will be stunned for 2 turns",
+	"",
+	"COOLDOWN:",
+	"   2 turns",
+	"",
+	"USAGE:",
+	"   activate the skill (press 2)",
+	"   followed by a direction (left, right, up or down)",
+	"",
+	"",
+	"Press ESC to close",
+	NULL
+};
+
+static char *charge_tooltip[] = {
+	"CHARGE",
+	"",
+	"   You charge in a chosen direction into the first obstructing",
+	"   object. Charging into an enemy can deliver massive damage.",
+	"",
+	"   Damage is affected by charge distance.",
+	"   Longer distance, more damage.",
+	"",
+	"COOLDOWN:",
+	"   5 turns",
+	"",
+	"USAGE:",
+	"   activate the skill (press 3)",
+	"   followed by a direction (left, right, up or down)",
+	"",
+	"",
+	"Press ESC to close",
+	NULL
+};
+
+static char *dagger_tooltip[] = {
+	"THROW DAGGER",
+	"",
+	"   You throw a dagger in the chosen direction.",
+	"",
+	"   Damage is affected by throwing distance.",
+	"   Longer distance, more damage.",
+	"",
+	"   Dagger supply is not infinite, your current dagger",
+	"   inventory is displayed in the panel to the right.",
+	"",
+	"COOLDOWN:",
+	"   0 turns",
+	"",
+	"USAGE:",
+	"   activate the skill (press 4)",
+	"   followed by a direction (left, right, up or down)",
+	"",
+	"",
+	"Press ESC to close",
+	NULL
+};
+
+static char *health_tooltip[] = {
+	"DRINK HEALTH",
+	"",
+	"   You take a sip from your health vial",
+	"",
+	"   The current amount of sips in your vials is",
+	"   dsplayed in the panel to the right.",
+	"",
+	"COOLDOWN:",
+	"   0 turns",
+	"",
+	"USAGE:",
+	"   Sip health (press 5)",
+	"",
+	"",
+	"Press ESC to close",
+	NULL
+};
 
 static Skill *
 create_default(const char *s_label, Sprite *s)
@@ -50,6 +150,7 @@ create_default(const char *s_label, Sprite *s)
 	skill->available = NULL;
 	skill->use = NULL;
 	skill->levelcap = 1;
+	skill->tooltip = NULL;
 	return skill;
 }
 
@@ -410,24 +511,29 @@ create_charge(void)
 }
 
 Skill*
-skill_create(enum SkillType t)
+skill_create(enum SkillType t, Camera *cam)
 {
 	Skill *skill;
 	switch (t) {
 		case FLURRY:
 			skill = create_flurry();
+			skill->tooltip = tooltip_create(flurry_tooltip, cam);
 			break;
 		case SIP_HEALTH:
 			skill = create_sip_health();
+			skill->tooltip = tooltip_create(health_tooltip, cam);
 			break;
 		case CHARGE:
 			skill = create_charge();
+			skill->tooltip = tooltip_create(charge_tooltip, cam);
 			break;
 		case DAGGER_THROW:
 			skill = create_throw_dagger();
+			skill->tooltip = tooltip_create(dagger_tooltip, cam);
 			break;
 		case BASH:
 			skill = create_bash();
+			skill->tooltip = tooltip_create(bash_tooltip, cam);
 			break;
 		default:
 			fatal("Unknown SkillType %u", (unsigned int) t);
@@ -444,5 +550,7 @@ void
 skill_destroy(Skill *skill)
 {
 	sprite_destroy(skill->icon);
+	if (skill->tooltip)
+		sprite_destroy(skill->tooltip);
 	free(skill);
 }

src/skill.h

@@ -52,10 +52,11 @@ typedef struct Skill_t {
 	bool active;
 	bool (*available)(Player*);
 	bool (*use)(struct Skill_t*, SkillData*);
+	Sprite *tooltip;
 } Skill;
 
 Skill*
-skill_create(enum SkillType);
+skill_create(enum SkillType, Camera *cam);
 
 void
 skill_destroy(Skill*);

src/skillbar.c

@@ -26,6 +26,7 @@
 #include "texturecache.h"
 #include "particle_engine.h"
 #include "update_data.h"
+#include "gui.h"
 
 static void
 load_texture(SkillBar *bar, const char *path, SDL_Renderer *renderer)
@@ -34,7 +35,7 @@ load_texture(SkillBar *bar, const char *path, SDL_Renderer *renderer)
 	t->dim.width = 16;
 	t->dim.height = 16;
 
-	for (unsigned int i = 0; i < 10; ++i) {
+	for (unsigned int i = 0; i < 5; ++i) {
 		char buffer[4];
 		Sprite *s = sprite_create();
 		s->pos = (Position) { i * 32 + 20, 20 };
@@ -73,7 +74,7 @@ skillbar_create(SDL_Renderer *renderer)
 	return bar;
 }
 
-void
+bool
 skillbar_check_skill_activation(SkillBar *bar, Player *player)
 {
 	for (int i = 0; i < PLAYER_SKILL_COUNT; ++i) {
@@ -85,6 +86,8 @@ skillbar_check_skill_activation(SkillBar *bar, Player *player)
 
 		timer_start(bar->skillSparkleTimer);
 	}
+
+	return timer_started(bar->skillSparkleTimer);
 }
 
 static void
@@ -256,8 +259,17 @@ skillbar_update(SkillBar *bar, UpdateData *data)
 {
 	Input *input = data->input;
 
-	unsigned int key = 0;
+	for (int i = 0; i < 5; ++i) {
-	for (int i = 0; i < 10; ++i) {
+		if (!data->player->skills[i])
+			continue;
+		if (input_modkey_is_pressed(input, KEY_SHIFT_NUM1 << i)) {
+			data->gui->activeTooltip = data->player->skills[i]->tooltip;
+			return;
+		}
+	}
+
+	Uint32 key = 0;
+	for (int i = 0; i < 5; ++i) {
 		if (!input_key_is_pressed(input, KEY_NUM0 << i))
 			continue;
 		key = i;

src/skillbar.h

@@ -39,7 +39,7 @@ typedef struct SkillBar_t {
 SkillBar *
 skillbar_create(SDL_Renderer*);
 
-void
+bool
 skillbar_check_skill_activation(SkillBar*, Player*);
 
 void

src/tooltip.c

@@ -0,0 +1,64 @@
+/*
+ * BreakHack - A dungeone crawler RPG
+ * Copyright (C) 2018  Linus Probert <linus.probert@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "tooltip.h"
+#include "gui_util.h"
+#include "defines.h"
+#include "gui.h"
+
+Sprite *
+tooltip_create(char **content, Camera *cam)
+{
+	int rowCount = 0;
+	char **contentIndex = content;
+	while (*contentIndex) {
+		rowCount++;
+		contentIndex++;
+	}
+
+	Sprite *sprite = gui_util_create_tooltip_frame_sprite(BOTTOM_GUI_WIDTH/16 - 6,
+							      (Uint32) ((rowCount * 10 + 48)/16),
+							      cam);
+	sprite->pos.x = 48;
+	sprite->pos.y = 96;
+	Texture *texture = sprite->textures[0];
+	Texture *text = texture_create();
+	texture_load_font(text, "GUI/SDS_8x8.ttf", LOG_FONT_SIZE, 0);
+	SDL_SetRenderTarget(cam->renderer, texture->texture);
+	SDL_Rect renderBox = { 16, 16, 0, 0 };
+
+	while (*content) {
+		if (strlen(*content) > 0) {
+			texture_load_from_text(text,
+					       *content,
+					       C_WHITE,
+					       C_WHITE,
+					       cam->renderer);
+			renderBox.w = text->dim.width;
+			renderBox.h = text->dim.height;
+			texture_render(text, &renderBox, cam);
+		}
+
+		renderBox.y += 10;
+		content++;
+	}
+	SDL_SetRenderTarget(cam->renderer, NULL);
+	texture_destroy(text);
+
+	return sprite;
+}

src/tooltip.h

@@ -0,0 +1,25 @@
+/*
+ * BreakHack - A dungeone crawler RPG
+ * Copyright (C) 2018  Linus Probert <linus.probert@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "camera.h"
+#include "sprite.h"
+
+Sprite *
+tooltip_create(char **content, Camera*);

src/update_data.h

@@ -22,11 +22,13 @@
 #include "player.h"
 #include "map.h"
 #include "roommatrix.h"
+#include "gui.h"
 
 typedef struct UpdateData {
 	Player *player;
 	Map *map;
 	RoomMatrix *matrix;
+	Gui *gui;
 	Input *input;
 	float deltatime;
 } UpdateData;