daily update on 20240305 by nitload youmu

实验/GLenvTest/main.c

@@ -0,0 +1,71 @@
+#include "gl.h"
+#include "glfw3.h"
+#include "stdio.h"
+#include "stdlib.h"
+#include <stdbool.h>
+#include "main.h"
+
+void 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", NULL, NULL);
+    if (window == NULL)
+    {
+        return -100;
+    }
+
+    glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
+
+    glfwMakeContextCurrent(window);
+
+    context = malloc(sizeof(GladGLContext));
+    gladLoadGLContext(context, glfwGetProcAddress);
+
+    unsigned int shader = context->CreateShader(GL_VERTEX_SHADER);
+    const GLchar* code[] = { "Test string\0" };
+    context->ShaderSource(shader, 1, code, NULL);
+    printf("%s\n", code);
+
+    while (!glfwWindowShouldClose(window))
+    {
+        // input
+        // -----
+        processInput(window);
+
+        // render
+        // ------
+        context->ClearColor(0.2f, 0.3f, 0.3f, 1.0f);
+        context->Clear(GL_COLOR_BUFFER_BIT);
+
+        // glfw: swap buffers and poll IO events (keys pressed/released, mouse moved etc.)
+        // -------------------------------------------------------------------------------
+        glfwSwapBuffers(window);
+        glfwPollEvents();
+    }
+    // glfw: terminate, clearing all previously allocated GLFW resources.
+    // ------------------------------------------------------------------
+    glfwTerminate();
+    free(context);
+    return 0;
+}
+
+// process all input: query GLFW whether relevant keys are pressed/released this frame and react accordingly
+// ---------------------------------------------------------------------------------------------------------
+void processInput(GLFWwindow* window)
+{
+    if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
+        glfwSetWindowShouldClose(window, true);
+}
+
+// glfw: whenever the window size changed (by OS or user resize) this callback function executes
+// ---------------------------------------------------------------------------------------------
+void framebuffer_size_callback(GLFWwindow* window, int width, int height)
+{
+    // make sure the viewport matches the new window dimensions; note that width and
+    // height will be significantly larger than specified on retina displays.
+    context->Viewport(0, 0, width, height);
+}