graphics submodule

CMakeLists.txt

@@ -36,14 +36,13 @@ find_package(Boost 1.56 REQUIRED COMPONENTS
 set(EXE_1_NAME loader)
 file(
     GLOB EXE_1_SOURCES
-    src/main.cpp
-    include/glad/glad.h
+    src/*.cpp
 )
 set(CMAKE_BINARY_DIR "bin")
 
 add_executable(${EXE_1_NAME} ${EXE_1_SOURCES} ${PROJECT_HEADERS}
                              ${PROJECT_SHADERS} ${VENDORS_SOURCES})
-target_link_libraries(${EXE_1_NAME} glfw ${GLAD_LIBRARIES} Boost::program_options)
+target_link_libraries(${EXE_1_NAME} glfw Boost::program_options)
 target_include_directories(${EXE_1_NAME} PRIVATE include)
 set_target_properties(${EXE_1_NAME} PROPERTIES
                       RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/${EXE_1_NAME})

build.sh

@@ -3,4 +3,6 @@ set -e
 flags="-DGLFW_USE_WAYLAND=ON" # compile glfw for wayland instead of X11
 cmake $flags .
 cmake --build .
-./bin/loader/loader
+echo -e "running the program, passing the given args"
+echo -e "========================================"
+./run.sh $@

run.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+set -e
+./bin/loader/loader $@

src/graphics.cpp

@@ -0,0 +1,63 @@
+#include <glad/glad.c>
+// glad must be loaded before GLFW
+#include <GLFW/glfw3.h>
+
+#include "graphics.hpp"
+
+#include <iostream>
+#include <unistd.h>
+
+void processInput(GLFWwindow *window) {
+  // if user presses ESC, close the window
+  if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
+    glfwSetWindowShouldClose(window, true);
+}
+
+void framebuffer_size_callback(GLFWwindow *window, int width, int height) {
+  glViewport(0, 0, width, height);
+}
+
+int mainWindow() {
+  /* graphics stuff */
+  glfwInit();
+  glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+  glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+  glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+  // glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
+
+  GLFWwindow *window = glfwCreateWindow(800, 600, "Shader Loader", NULL, NULL);
+  if (window == NULL) {
+    printf("Failed to create GLFW window\n");
+    glfwTerminate();
+    return -1;
+  }
+  glfwMakeContextCurrent(window);
+
+  if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress)) {
+    printf("Failed to initialize GLAD\n");
+    return -1;
+  }
+
+  glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
+
+  float vertices[] = {-0.5f, -0.5f, 0.0f, 0.5f, -0.5f, 0.0f, 0.0f, 0.5f, 0.0f};
+
+  unsigned int VBO;
+
+  glGenBuffers(1, &VBO);
+  glBindBuffer(GL_ARRAY_BUFFER, VBO);
+  glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
+
+  while (!glfwWindowShouldClose(window)) {
+    processInput(window);
+
+    glClearColor(0.8f, 0.4f, 0.1f, 1.0f);
+    glClear(GL_COLOR_BUFFER_BIT);
+
+    glfwSwapBuffers(window);
+    glfwPollEvents();
+  }
+
+  glfwTerminate();
+  return 0;
+}

src/graphics.hpp

@@ -0,0 +1 @@
+int mainWindow();

src/main.cpp

@@ -1,65 +1,40 @@
 #include <boost/program_options.hpp>
-#include <glad/glad.c>
-#include <GLFW/glfw3.h>
 
 #include <iostream>
-#include <unistd.h>
+
+#include "graphics.hpp"
 
 namespace po = boost::program_options;
 
-void framebuffer_size_callback(GLFWwindow *window, int width, int height);
-void processInput(GLFWwindow *window);
-
 int main(int argc, char **argv) {
-  glfwInit();
-  glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
-  glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
-  glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
-  // glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
 
-  GLFWwindow *window = glfwCreateWindow(800, 600, "Shader Loader", NULL, NULL);
-  if (window == NULL) {
-    printf("Failed to create GLFW window\n");
-    glfwTerminate();
-    return -1;
+  printf("argc:\t\t%d\n", argc);
+  for (int i = 0; i < argc; i++) {
+    printf("argv[%d]:\t%s\n", i, argv[i]);
   }
-  glfwMakeContextCurrent(window);
+  std::cout << std::endl;
 
-  if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress)) {
-    printf("Failed to initialize GLAD\n");
-    return -1;
+  po::options_description desc("Allowed options");
+  desc.add_options()("help", "produce help message")(
+      "compression", po::value<int>(), "set compression level");
+
+  po::variables_map vm;
+  /* po::store(po::parse_command_line(ac, av, desc), vm); */
+  po::notify(vm);
+
+  if (vm.count("help")) {
+    std::cout << desc << "\n";
+    return 1;
   }
 
-  glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
-
-  float vertices[] = {-0.5f, -0.5f, 0.0f, 0.5f, -0.5f, 0.0f, 0.0f, 0.5f, 0.0f};
-
-  unsigned int VBO;
-
-  glGenBuffers(1, &VBO);
-  glBindBuffer(GL_ARRAY_BUFFER, VBO);
-  glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
-
-  while (!glfwWindowShouldClose(window)) {
-    processInput(window);
-
-    glClearColor(0.8f, 0.4f, 0.1f, 1.0f);
-    glClear(GL_COLOR_BUFFER_BIT);
-
-    glfwSwapBuffers(window);
-    glfwPollEvents();
+  if (vm.count("compression")) {
+    std::cout << "Compression level was set to " << vm["compression"].as<int>()
+              << ".\n";
+  } else {
+    std::cout << "Compression level was not set.\n";
   }
 
-  glfwTerminate();
-  return 0;
-}
+  int result = mainWindow();
 
-void processInput(GLFWwindow *window) {
-  // if user presses ESC, close the window
-  if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
-    glfwSetWindowShouldClose(window, true);
-}
-
-void framebuffer_size_callback(GLFWwindow *window, int width, int height) {
-  glViewport(0, 0, width, height);
+  return result;
 }