Initial commit with boilerplate SDL2

3 files changed, 86 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..3bba2d4
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+fourier-series-viz
+tags
+*.o
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..7e9386d
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,10 @@
+CC = gcc
+CFLAGS = -Wall -Wextra $(shell pkgconf --cflags sdl2)
+LDFLAGS = $(shell pkgconf --libs sdl2)
+
+NAME = fourier-series-viz
+
+all: $(NAME)
+
+$(NAME): main.o
+	$(CC) -o $@ $(LDFLAGS) $^
diff --git a/main.c b/main.c
new file mode 100644
index 0000000..dda7ef4
--- /dev/null
+++ b/main.c
@@ -0,0 +1,73 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <SDL2/SDL.h>
+
+#define WINDOW_WIDTH  648
+#define WINDOW_HEIGHT 480
+#define CIRCLE_SIZE   100
+#define HISTORY_SIZE  WINDOW_WIDTH - CIRCLE_SIZE
+
+int g_history[HISTORY_SIZE] = {0};
+
+int main(void)
+{
+	for (size_t i = 0; i < HISTORY_SIZE; i++)
+		g_history[i] = 100;
+
+	if (SDL_Init(SDL_INIT_VIDEO) != 0)
+		exit(1);
+	SDL_Window *window = SDL_CreateWindow(
+		"fourier-series-viz",
+		SDL_WINDOWPOS_UNDEFINED,
+		SDL_WINDOWPOS_UNDEFINED,
+		WINDOW_WIDTH,
+		WINDOW_HEIGHT,
+		0
+	);
+	if (window == NULL)
+		exit(1);
+	SDL_Renderer *renderer = SDL_CreateRenderer(window, -1, 0);
+	if (renderer == NULL)
+		exit(1);
+
+	bool running = true;
+	while (running)
+	{
+		SDL_Event e;
+		while (SDL_PollEvent(&e))
+		{
+			switch (e.type)
+			{
+				case SDL_QUIT:
+					running = false;
+					break;
+				case SDL_KEYDOWN:
+					switch (e.key.keysym.sym)
+					{
+						case SDLK_q:
+						case SDLK_ESCAPE:
+							running = false;
+							break;
+					}
+			}
+		}
+		SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
+		SDL_RenderClear(renderer);
+
+		SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
+		for (size_t i = 0; i < HISTORY_SIZE; i++)
+		{
+			SDL_RenderDrawPoint(renderer, CIRCLE_SIZE + i, g_history[i]);
+		}
+
+
+		SDL_RenderPresent(renderer);
+		SDL_Delay(5);
+	}
+
+	SDL_DestroyRenderer(renderer);
+	SDL_DestroyWindow(window);
+	SDL_Quit();
+	return 0;
+}