Rearrange graphics projects into subdirectory

cpp/graphics/sdl-cmake/CMakeLists.txt

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+###############################################################################
+## Author: Shaun Reed                                                        ##
+## Legal: All Content (c) 2021 Shaun Reed, all rights reserved               ##
+##                                                                           ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0  ##
+##############################################################################
+#
+
+# Define CMake version
+cmake_minimum_required(VERSION 3.15)
+
+project(
+    #[[NAME]]    SDL-Cmake
+    DESCRIPTION  "Example project for building SDL projects with CMake"
+    LANGUAGES    CXX
+)
+
+# Add Library
+add_library(
+    lib-sdl-test            # Library Name
+    "src/lib-sdl-test.cpp"  # Sources..
+    "src/lib-sdl-test.h"
+)
+
+target_include_directories(            # When calling library, include a directory
+    lib-sdl-test                       # Library name
+    PUBLIC                             # Visibility
+    "${CMAKE_CURRENT_SOURCE_DIR}/src"  # Source directory for library
+    )
+
+# Search for SDL2 package
+find_package(SDL2 REQUIRED sdl2)
+
+# If SDL2 was found successfully, link to lib-sdl-test
+if (SDL2_FOUND)
+  # Any target that links with this library will also link to SDL2
+  # + Because we choose PUBLIC visibility
+  target_include_directories(lib-sdl-test PUBLIC ${SDL2_INCLUDE_DIRS})
+  target_link_libraries(lib-sdl-test PUBLIC "${SDL2_LIBRARIES}")
+
+  # Creating executable
+  add_executable(
+      sdl-test              # Exe name
+      "apps/sdl-test.cpp"   # Exe Source(s)
+  )
+
+  # Linking the exe to library
+  target_link_libraries(
+      sdl-test              # Executable to link
+      PRIVATE               # Visibility
+      lib-sdl-test          # Library to link
+  )
+
+else()
+  message(
+      "Error: CMake was unable to find SDL2 package.\n"
+      "Please install the libsdl2-dev package and try again.\n"
+  )
+endif()

cpp/graphics/sdl-cmake/apps/sdl-test.cpp

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+/*#############################################################################
+## Author: Shaun Reed                                                        ##
+## Legal: All Content (c) 2019 Shaun Reed, all rights reserved               ##
+## Requires SDL: `sudo apt-get install libsdl2-dev`                          ##
+## To build: `mkdir build && cd build && cmake .. cmake --build .`           ##
+##                                                                           ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0  ##
+##############################################################################
+## apps/inherited.cpp
+*/
+
+#include <lib-sdl-test.h>
+#include <iostream>
+
+int main (int argc, char const * argv[]) {
+  // Cast cli arguments to void since they are unused in this exe
+  (void)argc;
+  (void)argv;
+
+  // Ensure SDL is initialized before continuing
+  if (SDL_Init(SDL_INIT_EVERYTHING) < 0) exit(2);
+
+  SDL_Window *window;
+  SDL_Renderer *renderer;
+
+  if (InitScreen(window, renderer) < 0) {
+    std::cout << "Error - Unable to initialize SDL screen\n";
+  }
+
+  // Draw a window for 3000ms
+  DrawDelay(renderer, 3000);
+  // Destroy the window after 3 seconds
+  SDL_DestroyWindow(window);
+  // Destroy the renderer, since we won't be using it anymore
+  SDL_DestroyRenderer(renderer);
+
+  std::cout << "Testing creation of Shape, Rectangle...\n";
+  // Create a custom shape, and a default shape
+  Shape shape(4,4), dShape;
+  // Create a custom rectangle, and a default rectangle
+  Rectangle rect(4,8), dRect;
+  std::cout << dShape.PrintInfo() << std::endl;
+  std::cout << shape.PrintInfo() << std::endl;
+  std::cout << dRect.PrintInfo() << std::endl;
+  std::cout << rect.PrintInfo() << std::endl;
+
+  return 0;
+}

cpp/graphics/sdl-cmake/src/lib-sdl-test.cpp

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+/*##############################################################################
+## Author: Shaun Reed                                                        ##
+## Legal: All Content (c) 2019 Shaun Reed, all rights reserved               ##
+##                                                                           ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0  ##
+##############################################################################
+##
+*/
+
+#include <lib-sdl-test.h>
+
+
+/******************************************************************************/
+// Shape base class definitions
+std::string Shape::PrintInfo() {
+  return name + " HxW: " + std::to_string(height) + "x" + std::to_string(width);
+};
+
+
+/******************************************************************************/
+// SDL helper function definitions
+
+int InitScreen(SDL_Window* &window, SDL_Renderer* &renderer) {
+  int state = 0;
+
+  // Create window, renderer to draw to screen
+  if (SDL_CreateWindowAndRenderer(500, 500, 0, &window, &renderer) < 0) {
+    std::cout << "Error - Unable to create SDL screen and renderer objects\n";
+    state = -1;
+  }
+  
+	// Set render DrawColor, fill screen with color
+  if (SDL_SetRenderDrawColor(renderer, 0, 255, 0, 255) < 0 || SDL_RenderClear(renderer) < 0) {
+    std::cout << "Error - Unable to set renderer draw color\n";
+    state = -1;
+  }
+
+  return state;
+}
+
+void DrawDelay(SDL_Renderer* renderer, int delay) {
+  // Show what we have rendered
+	SDL_RenderPresent(renderer);
+  // Wait 3000ms, then continue
+	SDL_Delay(delay);
+  return;
+}

cpp/graphics/sdl-cmake/src/lib-sdl-test.h

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+/*#############################################################################
+## Author: Shaun Reed                                                        ##
+## Legal: All Content (c) 2019 Shaun Reed, all rights reserved               ##
+##                                                                           ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0  ##
+##############################################################################
+## src/lib-inherit.h
+*/
+
+#include <iostream>
+#include <string>
+#include <SDL2/SDL.h>
+#include <utility>
+#include <vector>
+
+
+class Shape {
+public:
+  // Provide ctor to set name of derived shape
+  Shape(double w, double h, std::string name_) :
+      width(w), height(h), name(std::move(name_)) {}
+  Shape(double w, double h) : width(w), height(h) {}
+  Shape() : width(2), height(2) {}
+  virtual ~Shape() = default;
+
+  // All derived inherit ability to show name
+  virtual std::string PrintInfo();
+
+  private:
+    double width, height;
+    const std::string name = "Shape";
+};
+
+
+/******************************************************************************/
+// Rectangle derived Shape
+
+class Rectangle: public Shape {
+  public:
+    Rectangle(double w, double h) : Shape(w, h, "Rectangle") {}
+    Rectangle() : Shape(4, 2, "Rectangle") {}
+    ~Rectangle() override = default;
+};
+
+
+/******************************************************************************/
+// SDL helper functions
+
+int InitScreen(SDL_Window* &window, SDL_Renderer* &renderer);
+
+void DrawDelay(SDL_Renderer* renderer, int delay);