fossvg (client): Create window

README.md

@@ -26,6 +26,7 @@ Build dependencies:
 
 - bash
 - a C++ 20 compiler
+- GLFW with headers
 
 Setup dependencies:
 

scripts/build.sh

@@ -63,7 +63,7 @@ COMPILE_COMMANDS=(
     "$CXX_WITH_FLAGS src/tools/arraydump.cpp -I./include -Lbin/lib -l:file.so -l:cli.so -o bin/tools/arraydump"
     "$CXX_WITH_FLAGS src/tools/baseconvert.cpp -I./include -Lbin/lib -l:cli.so -o bin/tools/baseconvert"
     "$CXX_WITH_FLAGS -pthread src/tools/hexnet.cpp -I./include -Lbin/lib -l:cli.so -l:libsockpp.so -o bin/tools/hexnet"
-    "$CXX_WITH_FLAGS src/fossvg.cpp -I./include -Lbin/lib -l:cli.so -o bin/fossvg"
+    "$CXX_WITH_FLAGS src/fossvg.cpp -I./include -Lbin/lib -l:cli.so -lglfw -o bin/fossvg"
     "$CXX_WITH_FLAGS src/fossvgd.cpp -I./include -Lbin/lib -l:cli.so -o bin/fossvgd"
 )
 for command in ${!COMPILE_COMMANDS[@]}; do

src/fossvg.cpp

@@ -18,6 +18,10 @@
 
 #include <iostream>
 #include <vector>
+#include <cstdint>
+#include <string>
+
+#include <GLFW/glfw3.h>
 
 #include "./lib/cli.hpp"
 
@@ -25,6 +29,27 @@
 #define EXIT_RUNTIME 1
 #define EXIT_USAGE   2
 
+//TODO: check the TODO above glfwInit() in void main()
+// #### Callbacks ##############################################################
+void cursorPositionCallback(GLFWwindow* window, double x, double y) {
+}
+
+void keyCallback(GLFWwindow* window, int32_t key, int32_t scancode, int32_t action, int32_t mods) {
+}
+
+void textInputCallback(GLFWwindow* window, uint32_t codepoint) {
+}
+
+void cursorEnterLeaveCallback(GLFWwindow* window, int32_t entered) {
+}
+
+void mouseButtonCallback(GLFWwindow* window, int32_t button, int32_t action, int32_t mods) {
+}
+
+void scrollCallback(GLFWwindow* window, double x, double y) {
+}
+// #### End Callbacks ##########################################################
+
 int main(int argc, char* argv[]) {
     std::vector<CLI::Flag> flags;
     flags.push_back(CLI::Flag('h', "help",        "print help and exit"));
@@ -63,5 +88,50 @@ int main(int argc, char* argv[]) {
         return EXIT_USAGE;
     }
 
+
+    // TODO: Find a better place for this
+    // Ideally, the window management and rendering portion of FOSS-VG should
+    // live in a library so it can be easily reloaded/restarted for things like
+    // switching from/to fullscreen. For now, I am going to put it here because
+    // I want to get it going before making it pretty.
+    {
+        if (!glfwInit()) {
+            return EXIT_RUNTIME;
+        }
+
+        //TODO: allow to set startup window size using CLI options
+        uint32_t windowWidth  = 1366;
+        uint32_t windowHeight = 768;
+        //TODO: add a version macro
+        // (for example Git commit hash passed on the compiler command line)
+        std::string windowTitle = "FOSS-VG";
+
+        // Apparently, this also allows to set things like whether the window is full-screen
+        GLFWwindow* window = glfwCreateWindow(windowWidth, windowHeight, windowTitle.c_str(), nullptr, nullptr);
+
+        if (window == nullptr) {
+            return EXIT_RUNTIME;
+        }
+
+        // What dis do? It was in a tutorial.
+        glfwMakeContextCurrent(window);
+
+        glfwSetCursorPosCallback(window, cursorPositionCallback);
+        glfwSetKeyCallback(window, keyCallback);
+        glfwSetCharCallback(window, textInputCallback);
+        glfwSetCursorEnterCallback(window, cursorEnterLeaveCallback);
+        glfwSetMouseButtonCallback(window, mouseButtonCallback);
+        glfwSetScrollCallback(window, scrollCallback);
+
+        while (!glfwWindowShouldClose(window)) {
+
+            glfwSwapBuffers(window);
+
+            glfwPollEvents();
+        }
+
+        glfwTerminate();
+    }
+
     return EXIT_SUCCESS;
 }