flappychik

commit 70b5024d4ab531a17bab3837403b112aabb989de
parent b4109700c5bfa6297a872f15b7d62624ddcbec80
Author: bsandro <brian.drosan@gmail.com>
Date:   Sun, 20 Mar 2022 01:03:16 +0200

basic menu support

Diffstat:
M
Makefile
 | 
4
++--
A
assets/APL386.ttf
 | 
0

M
main.c
 | 
76
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-------------

3 files changed, 65 insertions(+), 15 deletions(-)
diff --git a/Makefile b/Makefile
@@ -1,7 +1,7 @@
 NAME=$(shell basename ${PWD})
-SDL2FLAGS=$(shell pkg-config --cflags sdl2 SDL2_image)
+SDL2FLAGS=$(shell pkg-config --cflags sdl2 SDL2_image SDL2_ttf)
 CFLAGS?=-std=c99 -Wall -Wextra -pedantic -I. -O0 -g
-LDFLAGS?=$(shell pkg-config --libs sdl2 SDL2_image)
+LDFLAGS?=$(shell pkg-config --libs sdl2 SDL2_image SDL2_ttf)
 SRC=$(wildcard *.c)
 DEPS:=$(wildcard *.h)
 OBJ:=$(SRC:.c=.o)
diff --git a/assets/APL386.ttf b/assets/APL386.ttf
Binary files differ.
diff --git a/main.c b/main.c
@@ -4,6 +4,7 @@
 #include <assert.h>
 #include <SDL.h>
 #include <SDL_image.h>
+#include <SDL_ttf.h>
 
 #ifdef __APPLE__
 #define WINDOW_FLAGS SDL_WINDOW_METAL | SDL_WINDOW_ALLOW_HIGHDPI
@@ -14,6 +15,9 @@
 #define GAME_WIN_WIDTH 800
 #define GAME_WIN_HEIGHT 600
 #define GAME_FPS 60
+#define GAME_FALL_ACCEL 0.85 // pixels per second^2 essentially
+
+enum game_state_t { GAME_STATE_INIT, GAME_STATE_RUNNING, GAME_STATE_OVER };
 
 struct sprite_t {
 	SDL_Texture *texture;
@@ -24,7 +28,7 @@ struct sprite_t {
 };
 
 struct game_t {
-	bool over;
+	enum game_state_t state;
 	SDL_Window *screen;
 	int scrW, scrH;
 	SDL_Renderer *renderer;
@@ -33,12 +37,19 @@ struct game_t {
 	struct sprite_t ship;
 };
 
-void process_frame(uint64_t ts, uint64_t ftime, struct game_t *game) {
+struct menu_t {
+	struct game_t *game;
+	TTF_Font *font;
+	SDL_Surface *surface;
+	SDL_Texture *texture;
+};
+
+void draw_game(uint64_t ftime, struct game_t *game) {
 	game->ship.velocity += game->ship.accel * ftime;
 	game->ship.rect.y += (ftime * game->ship.velocity / 1000.0);
 
 	if (game->ship.rect.y >= game->scrH) {
-		game->over = true;
+		game->state = GAME_STATE_INIT;
 	}
 
 	// top border
@@ -63,7 +74,26 @@ void process_frame(uint64_t ts, uint64_t ftime, struct game_t *game) {
 	SDL_RenderPresent(game->renderer);
 
 	//printf("frame time: %llu\n", ftime);
-	game->last_frame = ts;
+}
+
+void draw_menu(struct menu_t *menu) {
+	if (menu->surface == NULL) {
+		SDL_Color color = { 255, 255, 255, 0 };
+		menu->surface = TTF_RenderText_Solid(menu->font, "Press <space> to play", color);
+		assert(menu->surface != NULL);
+	}
+
+	if (menu->texture == NULL) {
+		menu->texture = SDL_CreateTextureFromSurface(menu->game->renderer, menu->surface);
+		assert(menu->texture != NULL);
+	}
+
+	SDL_Rect rect;
+	SDL_QueryTexture(menu->texture, NULL, NULL, &rect.w, &rect.h);
+
+	SDL_RenderClear(menu->game->renderer);
+	SDL_RenderCopy(menu->game->renderer, menu->texture, NULL, &rect);
+	SDL_RenderPresent(menu->game->renderer);
 }
 
 int main(int argc, char *argv[]) {
@@ -72,9 +102,10 @@ int main(int argc, char *argv[]) {
 
 	SDL_Event event;
 	struct game_t game = {0};
-	game.over = false;
+	game.state = GAME_STATE_INIT;
 
 	SDL_Init(SDL_INIT_VIDEO);
+	TTF_Init();
 
 	game.screen = SDL_CreateWindow("flappychik", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, GAME_WIN_WIDTH, GAME_WIN_HEIGHT, WINDOW_FLAGS);
 	assert(game.screen != NULL);
@@ -102,30 +133,42 @@ int main(int argc, char *argv[]) {
 
 	// hidpi scale
 	float hidpi_scale = (float)game.scrW / GAME_WIN_WIDTH;
-	printf("scale: %.2f\n", hidpi_scale);
 	// initial values
 	game.last_frame = SDL_GetTicks64();
-	game.ship.rect.x = 150;
+	game.ship.rect.x = 150; // initial position
 	game.ship.rect.y = 50;
 	game.ship.rect.w *= hidpi_scale;
 	game.ship.rect.h *= hidpi_scale;
 	game.bg.rect.w *= hidpi_scale;
 	game.bg.rect.h *= hidpi_scale;
-	game.ship.accel = 0.85; // pixels per second^2 essentially
+	game.ship.accel = GAME_FALL_ACCEL;
+
+	// menu
+	struct menu_t menu = {0};
+	menu.game = &game;
+	menu.font = TTF_OpenFont("assets/APL386.ttf", 70);
+	assert(menu.font != NULL);
 
 	// main game loop
-	while (!game.over) {
+	while (game.state != GAME_STATE_OVER) {
 		while (SDL_PollEvent(&event)) {
 			switch (event.type) {
 			case SDL_QUIT:
-				game.over = true;
+				game.state = GAME_STATE_OVER;
 				break;
 			case SDL_KEYDOWN:
 				if (event.key.keysym.sym == SDLK_q) { // quit if "q" button is pressed
-					game.over = true;
+					game.state = GAME_STATE_OVER;
 				}
 				if (event.key.keysym.sym == SDLK_SPACE) {
-					game.ship.velocity = -600;
+					if (game.state == GAME_STATE_RUNNING) {
+						game.ship.velocity = -600;
+					} else { // reset game
+						game.state = GAME_STATE_RUNNING;
+						game.ship.velocity = 0;
+						game.ship.rect.x = 150;
+						game.ship.rect.y = 50;
+					}
 				}
 				break;
 			}
@@ -135,15 +178,22 @@ int main(int argc, char *argv[]) {
 		uint64_t ftime = ts - game.last_frame;
 
 		if (ftime >= 1000/GAME_FPS) {
-			process_frame(ts, ftime, &game);
+			if (game.state == GAME_STATE_RUNNING) {
+				draw_game(ftime, &game);
+			} else {
+				draw_menu(&menu);
+			}
+			game.last_frame = ts;
 		}
 	}
 
 	// cleanup
+	TTF_CloseFont(menu.font);
 	SDL_DestroyTexture(game.bg.texture);
 	SDL_DestroyTexture(game.ship.texture);
 	SDL_DestroyRenderer(game.renderer);
 	SDL_DestroyWindow(game.screen);
+	TTF_Quit();
 	SDL_Quit();
 
 	printf("bye!\n");