ininial commit

Makefile

@@ -0,0 +1,13 @@
+CC := gcc
+LIBS := `pkg-config --libs sdl2`
+INC := `pkg-config --cflags sdl2`
+SRC := src/main.c
+OUT := build/main
+
+build: $(SRC)
+	$(CC) -o $(OUT) $< $(INC) $(LIBS)
+
+run: build
+	$(OUT)
+
+.PHONY: build run

src/main.c

@@ -0,0 +1,87 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <SDL2/SDL.h>
+#include <SDL2/SDL_events.h>
+
+#define WIDTH 320
+#define HEIGHT 200
+
+uint32_t framebuffer[WIDTH * HEIGHT];
+
+void put_pixel(unsigned int x, unsigned int y, uint32_t color) {
+	framebuffer[WIDTH * y + x] = color;
+}
+
+int main() {
+	if (SDL_Init(SDL_INIT_VIDEO) != 0) {
+		fprintf(stderr, "SDL_Init failed! %s\n", SDL_GetError());
+		return EXIT_FAILURE;
+	}
+
+	SDL_Window *window;
+	SDL_Renderer *renderer;
+	SDL_Texture *texture;
+	SDL_Event event;
+	bool is_running = true;
+
+	window = SDL_CreateWindow(
+		"SDL Framebuffer", 0, 0,
+		WIDTH, HEIGHT, 0
+	);
+	if (window == NULL) {
+		fprintf(stderr, "SDL_CreateWindow failed! %s\n", SDL_GetError());
+		SDL_Quit();
+		return EXIT_FAILURE;
+	}
+
+	renderer = SDL_CreateRenderer(window, 0, 0);
+	if (renderer == NULL) {
+		fprintf(stderr, "SDL_CreateRenderer failed! %s\n", SDL_GetError());
+		SDL_DestroyWindow(window);
+		SDL_Quit();
+		return EXIT_FAILURE;
+	}
+
+	texture = SDL_CreateTexture(
+		renderer, SDL_PIXELFORMAT_XRGB8888, 
+		SDL_TEXTUREACCESS_STREAMING, 
+		WIDTH, HEIGHT
+	);
+	if (texture == NULL) {
+		fprintf(stderr, "SDL_CreateTexture failed! %s\n", SDL_GetError());
+		SDL_DestroyWindow(window);
+		SDL_DestroyRenderer(renderer);
+		SDL_Quit();
+		return EXIT_FAILURE;
+	}
+
+	for (int i = 0; i < 20; i++) {
+		for (int j = 0; j < 20; j++) {
+			put_pixel(i, j, 0x00FF00);
+		}
+	}
+
+	while (is_running) {
+		while (SDL_PollEvent(&event)) {
+			if (event.type == SDL_QUIT) {
+				is_running = false;
+			}
+		}
+
+		SDL_UpdateTexture(texture, NULL, framebuffer, WIDTH * sizeof(uint32_t));
+
+		SDL_RenderClear(renderer);
+		SDL_RenderCopy(renderer, texture, NULL, NULL);
+		SDL_RenderPresent(renderer);
+	}
+
+	SDL_DestroyTexture(texture);
+	SDL_DestroyRenderer(renderer);
+	SDL_DestroyWindow(window);
+
+	SDL_Quit();
+
+	return EXIT_SUCCESS;
+}