init

.gitignore

@@ -0,0 +1 @@
+build

Makefile

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+# Compiler and flags
+CPPC = g++
+CPPC_FLAGS = -std=c++23 -s -O3 -lSDL3 -Wall -Wextra -Wno-write-strings
+DEBUG_FLAGS = -ggdb -std=c++23 -lSDL3  -Wall -Wextra -Wno-write-strings
+DEBUG_ASANITIZE = -fsanitize=address -ggdb -fno-omit-frame-pointer -std=c++23 -lSDL3 -Wall -Wextra -Wno-write-strings
+
+
+SRC_PATH := src
+OBJ_PATH := build/obj
+BIN_PATH := build/bin
+
+BIN_NAME = pupes-screensaver
+
+
+SRC_FILES := $(shell find $(SRC_PATH) -name '*.cpp')
+OBJ_FILES := $(patsubst $(SRC_PATH)/%.cpp,$(OBJ_PATH)/%.o,$(SRC_FILES))
+
+
+all: make-build-dir $(BIN_PATH)/$(BIN_NAME)
+
+
+debug: CPPC_FLAGS = $(DEBUG_FLAGS)
+debug: make-build-dir $(BIN_PATH)/$(BIN_NAME)
+
+asan: CPPC_FLAGS = $(DEBUG_ASANITIZE)
+asan: make-build-dir $(BIN_PATH)/$(BIN_NAME)
+
+
+make-build-dir:
+	mkdir -p $(OBJ_PATH)
+	mkdir -p $(BIN_PATH)
+
+
+$(BIN_PATH)/$(BIN_NAME): $(OBJ_FILES)
+	$(CPPC) $(CPPC_FLAGS) $^ -o $@
+
+
+$(OBJ_PATH)/%.o: $(SRC_PATH)/%.cpp 
+	$(CPPC) $(CPPC_FLAGS) -c $< -o $@
+
+
+install:
+	@install -vpm 755 -o root -g root $(BIN_PATH)/$(BIN_NAME) /usr/bin/
+
+clean:
+	rm -fr build
+
+.PHONY: all clean install debug asan

src/const.h

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+#include <SDL3/SDL_stdinc.h>
+
+#ifndef CONST_NS
+#define CONST_NS
+
+constexpr int SCREEN_WIDTH = 1920;
+constexpr int SCREEN_HEIGHT = 1080;
+constexpr int TARGET_FPS = 60;
+constexpr Uint64 TARGET_FRAME_TIME_NS = 1'000'000'000 / TARGET_FPS;
+
+#endif

src/func.cpp

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+#include <random>
+
+int get_random_num(int min, int max) {
+  std::random_device dev;
+  std::mt19937 rng(dev());
+  std::uniform_int_distribution<std::mt19937::result_type> dist(
+      min, max); // set range
+
+  return dist(rng);
+}

src/func.h

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+int get_random_num(int min, int max);

src/main.cpp

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+#include <SDL3/SDL.h>
+#include "types.h"
+#include "const.h"
+#include <SDL3/SDL_rect.h>
+#include <SDL3/SDL_render.h>
+#include <iostream>
+#include "func.h"
+#include <unistd.h>
+#include <csignal>
+
+
+
+
+int main() {
+	SDL_Init(SDL_INIT_VIDEO);
+	sdl_session main_sdl_session;
+
+	main_sdl_session.window = SDL_CreateWindow("pupes screensave", SCREEN_WIDTH, SCREEN_HEIGHT, 0);
+	SDL_Renderer *renderer = SDL_CreateRenderer(main_sdl_session.window, "gpu,vulcan");
+	
+	signal(SIGTERM, exit);
+	SDL_FPoint last_pos = {static_cast<float>(get_random_num(0,1920)),static_cast<float>(get_random_num(0,1080))};
+	SDL_FPoint new_pos;
+	while (true) {
+
+		SDL_SetRenderDrawColor(renderer, get_random_num(0,255), get_random_num(0,255),get_random_num(0,255), SDL_ALPHA_OPAQUE);
+		new_pos = {static_cast<float>(get_random_num(0,1920)),static_cast<float>(get_random_num(0,1080))};
+		SDL_RenderLine(renderer, last_pos.x ,last_pos.y, new_pos.x,new_pos.y);
+		last_pos = new_pos;
+		SDL_RenderPresent(renderer);
+		usleep(500000);
+	}
+
+	std::cin.get();
+}

src/types.h

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+#include <SDL3/SDL.h>
+struct sdl_session {
+  SDL_Window *window;
+  SDL_Renderer *renderer;
+};