Initial commit - some engine bugs stopping compiling

third-party/glad/example/c/glx.c

@@ -0,0 +1,98 @@
+// gcc example/c/glx.c -o build/glx -Ibuild/include build/src/*.c -ldl -lX11
+
+#include <stdio.h>
+#include <stdbool.h>
+#include <unistd.h>
+
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+
+#include <glad/gl.h>
+#include <glad/glx.h>
+
+
+const int window_width = 800, window_height = 480;
+
+
+int main(void) {
+    Display *display = XOpenDisplay(NULL);
+    if (display == NULL) {
+        printf("cannot connect to X server\n");
+        return 1;
+    }
+
+    int screen = DefaultScreen(display);
+
+    int glx_version = gladLoaderLoadGLX(display, screen);
+    if (!glx_version) {
+        printf("Unable to load GLX.\n");
+        return 1;
+    }
+    printf("Loaded GLX %d.%d\n", GLAD_VERSION_MAJOR(glx_version), GLAD_VERSION_MINOR(glx_version));
+
+    Window root = RootWindow(display, screen);
+
+    GLint visual_attributes[] = { GLX_RGBA, GLX_DOUBLEBUFFER, None };
+    XVisualInfo *visual_info = glXChooseVisual(display, screen, visual_attributes);
+
+    Colormap colormap = XCreateColormap(display, root, visual_info->visual, AllocNone);
+
+    XSetWindowAttributes attributes;
+    attributes.event_mask = ExposureMask | KeyPressMask | KeyReleaseMask;
+    attributes.colormap = colormap;
+
+    Window window =
+        XCreateWindow(display, root, 0, 0, window_width, window_height, 0,
+                      visual_info->depth, InputOutput, visual_info->visual,
+                      CWColormap | CWEventMask, &attributes);
+
+    XMapWindow(display, window);
+    XStoreName(display, window, "[glad] GLX with X11");
+
+    if (!window) {
+        printf("Unable to create window.\n");
+        return 1;
+    }
+
+    GLXContext context = glXCreateContext(display, visual_info, NULL, GL_TRUE);
+    glXMakeCurrent(display, window, context);
+
+    int gl_version = gladLoaderLoadGL();
+    if (!gl_version) {
+        printf("Unable to load GL.\n");
+        return 1;
+    }
+    printf("Loaded GL %d.%d\n", GLAD_VERSION_MAJOR(gl_version), GLAD_VERSION_MINOR(gl_version));
+
+    XWindowAttributes gwa;
+    XGetWindowAttributes(display, window, &gwa);
+    glViewport(0, 0, gwa.width, gwa.height);
+
+    bool quit = false;
+    while (!quit) {
+        while (XPending(display)) {
+            XEvent xev;
+            XNextEvent(display, &xev);
+
+            if (xev.type == KeyPress) {
+                quit = true;
+            }
+        }
+
+        glClearColor(0.8, 0.6, 0.7, 1.0);
+        glClear(GL_COLOR_BUFFER_BIT);
+
+        glXSwapBuffers(display, window);
+
+        usleep(1000 * 10);
+    }
+
+    glXMakeCurrent(display, 0, 0);
+    glXDestroyContext(display, context);
+
+    XDestroyWindow(display, window);
+    XFreeColormap(display, colormap);
+    XCloseDisplay(display);
+
+    gladLoaderUnloadGLX();
+}