daily update on 20240226 by nitload youmu

实验/ct1/main.c

@@ -0,0 +1,78 @@
+#include "gl.h"
+#include "glfw3.h"
+#include <stdio.h>
+#include <stdbool.h>
+
+GladGLContext* currentContext;
+
+void processInput(GLFWwindow* window);
+void FrameBufferSizeCallback(int x, int y, int height, int width);
+
+int main()
+{
+    glfwInit();
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 6);
+    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+
+    GLFWwindow* window = glfwCreateWindow(
+        800, 600, "Test Context", NULL, NULL
+    );
+    if (window == NULL)
+    {
+        printf("Fatal error: failed to create glfw window.");
+        glfwTerminate();
+        return -1;
+    }
+    else
+    {
+        printf("%llu\n", (uint64_t)window);
+    }
+
+    glfwMakeContextCurrent(window);
+
+    currentContext = calloc(sizeof(GladGLContext));
+
+    PFNGLCLEARCOLORPROC glClearColor = (PFNGLCLEARCOLORPROC)glfwGetProcAddress("glClearColor");
+    PFNGLCLEARPROC glClear = (PFNGLCLEARPROC)glfwGetProcAddress("glClear");
+
+    printf("%llu\n", (uint64_t)glClearColor);
+    printf("%llu\n", (uint64_t)glClear);
+
+    /*
+    if (gladLoadGLContext(currentContext, (GLADloadfunc)glfwGetProcAddress))
+    {
+        printf("Fatal error: failed in loading OpenGL function.");
+        glfwTerminate();
+        return -1;
+    }
+    /**/
+
+    glfwSetFramebufferSizeCallback(window, FrameBufferSizeCallback);
+
+    while (!glfwWindowShouldClose(window))
+    {
+        processInput(window);
+
+        glClearColor(0.9f, 0.3f, 0.9f, 1.0f);
+        glClear(GL_COLOR_BUFFER_BIT /* | GLFW_DEPTH_BITS /**/);
+
+        //printf("%llu", (uint64_t)currentContext->Clear);
+
+        glfwSwapBuffers(window);
+        glfwPollEvents();
+    }
+    glfwTerminate();
+    return 0;
+}
+
+void processInput(GLFWwindow* window)
+{
+    if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
+        glfwSetWindowShouldClose(window, true);
+}
+
+void FrameBufferSizeCallback(int x, int y, int height, int width)
+{
+    currentContext->Viewport(0, 0, height, width);
+}