Initial commit - some engine bugs stopping compiling

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

@@ -0,0 +1,73 @@
+// This example requires you to generate glad with the --on-demand option and optionally --loader and --debug.
+// gcc -o gl_glfw_on_demand example/c/gl_glfw_on_demand.c build/src/gl.c -Ibuild/include -ldl -lglfw
+#include <stdlib.h>
+#include <stdio.h>
+
+#include <glad/gl.h>
+
+#include <GLFW/glfw3.h>
+
+
+const GLuint WIDTH = 800, HEIGHT = 600;
+
+
+static void pre_call_gl_callback(const char *name, GLADapiproc apiproc, int len_args, ...) {
+    printf("about to call gl func: %s\n", name);
+}
+
+void key_callback(GLFWwindow* window, int key, int scancode, int action, int mode) {
+    if (action != GLFW_PRESS) {
+        return;
+    }
+
+    if (key == GLFW_KEY_ESCAPE) {
+        glfwSetWindowShouldClose(window, GL_TRUE);
+#ifdef GLAD_OPTION_GL_DEBUG
+    } else if (key == GLFW_KEY_H) {
+        printf("Installing glad debug function pointers\n");
+        gladInstallGLDebug();
+    } else if (key == GLFW_KEY_J) {
+        printf("Uninstalling glad debug function pointers\n");
+        gladUninstallGLDebug();
+#endif
+    }
+}
+
+int main(void) {
+    glfwInit();
+
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 2);
+    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+
+    GLFWwindow* window = glfwCreateWindow(WIDTH, HEIGHT, "[glad] GL with GLFW", NULL, NULL);
+    glfwMakeContextCurrent(window);
+
+    glfwSetKeyCallback(window, key_callback);
+
+    // If glad is generated with the --loader and --on-demand option
+    // you don't have to call any glad function.
+    // It is recommended to use the loader provided by your context creation library
+    // instead of the glad loader.
+#ifndef GLAD_GL_LOADER
+    gladSetGLOnDemandLoader(glfwGetProcAddress);
+#endif
+
+#ifdef GLAD_OPTION_GL_DEBUG
+    gladUninstallGLDebug();
+    gladSetGLPreCallback(pre_call_gl_callback);
+#endif
+
+    while (!glfwWindowShouldClose(window)) {
+        glfwPollEvents();
+
+        glClearColor(0.7f, 0.9f, 0.1f, 1.0f);
+        glClear(GL_COLOR_BUFFER_BIT);
+
+        glfwSwapBuffers(window);
+    }
+
+    glfwTerminate();
+
+    return 0;
+}