daily update on 20240213 by nitload youmu. 逐步弃用GLFW，正在使用wgl重写glfw底层，相关实现转移到C#实现，SSC彻底变成线性代数计算器。
This commit is contained in:
Nitload
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#include <Windows.h>
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#include <GL/gl.h>
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#include <tchar.h>
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#include <iostream>
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#define SIMPLE_DEMO 0
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#if defined SIMPLE_DEMO && SIMPLE_DEMO ==1
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LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
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int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
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{
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// Create a window
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const char* className = "OpenGLWindowClass";
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const char* windowTitle = "OpenGL Window";
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const int windowWidth = 800;
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const int windowHeight = 600;
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WNDCLASSEX wc = {};
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wc.cbSize = sizeof(WNDCLASSEX);
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wc.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
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wc.lpfnWndProc = WindowProc;
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wc.hInstance = hInstance;
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wc.hCursor = LoadCursor(NULL, IDC_ARROW);
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wc.lpszClassName = _T("OpenGLWindowClass");
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if (!RegisterClassEx(&wc))
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{
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MessageBox(NULL, _T("Failed to register window class"), _T("Error"), MB_OK | MB_ICONERROR);
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return -1;
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}
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HWND hwnd = CreateWindowEx(
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0, //窗口扩展风格
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_T("OpenGLWindowClass"), //指向注册类名的指针
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_T("OpenGL Window"), //指向窗口名称的指针
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WS_OVERLAPPEDWINDOW, //窗口风格
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CW_USEDEFAULT, //窗口水平位置
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CW_USEDEFAULT, //窗口垂直位置
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windowWidth, //窗口宽度
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windowHeight, //窗口深度
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NULL, //父窗口的句柄
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NULL, //菜单的句柄或是子窗口的标识符
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hInstance, //应用程序实例的句柄
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NULL //指向窗口的创建数据
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);
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if (!hwnd)
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{
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MessageBox(NULL, _T("Failed to create window"), _T("Error"), MB_OK | MB_ICONERROR);
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return -1;
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}
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else
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{
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UpdateWindow(hwnd);
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ShowWindow(hwnd, SW_SHOW);
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}
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HDC hdc = GetDC(hwnd);
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// Set pixel format
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PIXELFORMATDESCRIPTOR pfd = {};
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pfd.nSize = sizeof(PIXELFORMATDESCRIPTOR);
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pfd.nVersion = 1;
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pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
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pfd.iPixelType = PFD_TYPE_RGBA;
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pfd.cColorBits = 32;
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pfd.cDepthBits = 24;
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pfd.cStencilBits = 8;
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pfd.iLayerType = PFD_MAIN_PLANE;
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int pixelFormat = ChoosePixelFormat(hdc, &pfd);
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if (!SetPixelFormat(hdc, pixelFormat, &pfd))
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{
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MessageBox(NULL, _T("Failed to set pixel format"), _T("Error"), MB_OK | MB_ICONERROR);
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return -1;
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}
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// Create and activate OpenGL context
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HGLRC hglrc = wglCreateContext(hdc);
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if (!wglMakeCurrent(hdc, hglrc))
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{
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MessageBox(NULL, _T("Failed to make OpenGL context current"), _T("Error"), MB_OK | MB_ICONERROR);
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return -1;
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}
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MessageBoxA(0, (char*)glGetString(GL_VERSION), "OPENGL VERSION", 0);
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// Now you have an active OpenGL context
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// Main message loop
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MSG msg = {};
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while (GetMessage(&msg, NULL, 0, 0))
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{
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TranslateMessage(&msg);
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DispatchMessage(&msg);
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}
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// Clean up and exit
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wglMakeCurrent(NULL, NULL);
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wglDeleteContext(hglrc);
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ReleaseDC(hwnd, hdc);
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DestroyWindow(hwnd);
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return 0;
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}
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LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
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{
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switch (uMsg)
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{
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case WM_CLOSE:
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PostQuitMessage(0);
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return 0;
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case WM_DESTROY:
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return 0;
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}
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return DefWindowProc(hwnd, uMsg, wParam, lParam);
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}
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#else
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// Sample code showing how to create a modern OpenGL window and rendering context on Win32.
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#include <stdbool.h>
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typedef HGLRC WINAPI wglCreateContextAttribsARB_type(HDC hdc, HGLRC hShareContext, const int* attribList);
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wglCreateContextAttribsARB_type* wglCreateContextAttribsARB;
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// See https://www.opengl.org/registry/specs/ARB/wgl_create_context.txt for all values
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#define WGL_CONTEXT_MAJOR_VERSION_ARB 0x2091
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#define WGL_CONTEXT_MINOR_VERSION_ARB 0x2092
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#define WGL_CONTEXT_PROFILE_MASK_ARB 0x9126
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#define WGL_CONTEXT_CORE_PROFILE_BIT_ARB 0x00000001
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typedef BOOL WINAPI wglChoosePixelFormatARB_type(HDC hdc, const int* piAttribIList, const FLOAT* pfAttribFList, UINT nMaxFormats, int* piFormats, UINT* nNumFormats);
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wglChoosePixelFormatARB_type* wglChoosePixelFormatARB;
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// See https://www.opengl.org/registry/specs/ARB/wgl_pixel_format.txt for all values
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#define WGL_DRAW_TO_WINDOW_ARB 0x2001
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#define WGL_ACCELERATION_ARB 0x2003
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#define WGL_SUPPORT_OPENGL_ARB 0x2010
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#define WGL_DOUBLE_BUFFER_ARB 0x2011
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#define WGL_PIXEL_TYPE_ARB 0x2013
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#define WGL_COLOR_BITS_ARB 0x2014
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#define WGL_DEPTH_BITS_ARB 0x2022
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#define WGL_STENCIL_BITS_ARB 0x2023
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#define WGL_FULL_ACCELERATION_ARB 0x2027
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#define WGL_TYPE_RGBA_ARB 0x202B
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static void
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fatal_error(const char* msg)
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{
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MessageBoxA(NULL, msg, "Error", MB_OK | MB_ICONEXCLAMATION);
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exit(EXIT_FAILURE);
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}
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static void
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init_opengl_extensions(void)
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{
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// Before we can load extensions, we need a dummy OpenGL context, created using a dummy window.
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// We use a dummy window because you can only set the pixel format for a window once. For the
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// real window, we want to use wglChoosePixelFormatARB (so we can potentially specify options
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// that aren't available in PIXELFORMATDESCRIPTOR), but we can't load and use that before we
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// have a context.
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WNDCLASSA window_class = {};
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window_class.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
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window_class.lpfnWndProc = DefWindowProcA;
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window_class.hInstance = GetModuleHandle(0);
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window_class.lpszClassName = "Dummy_WGL_djuasiodwa";
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if (!RegisterClassA(&window_class)) {
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fatal_error("Failed to register dummy OpenGL window.");
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}
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HWND dummy_window = CreateWindowExA(
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0,
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window_class.lpszClassName,
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"Dummy OpenGL Window",
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0,
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CW_USEDEFAULT,
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CW_USEDEFAULT,
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CW_USEDEFAULT,
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CW_USEDEFAULT,
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0,
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0,
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window_class.hInstance,
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0);
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if (!dummy_window) {
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fatal_error("Failed to create dummy OpenGL window.");
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}
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HDC dummy_dc = GetDC(dummy_window);
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PIXELFORMATDESCRIPTOR pfd = {};
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pfd.nSize = sizeof(pfd);
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pfd.nVersion = 1;
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pfd.iPixelType = PFD_TYPE_RGBA;
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pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
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pfd.cColorBits = 32;
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pfd.cAlphaBits = 8;
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pfd.iLayerType = PFD_MAIN_PLANE;
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pfd.cDepthBits = 24;
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pfd.cStencilBits = 8;
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int pixel_format = ChoosePixelFormat(dummy_dc, &pfd);
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if (!pixel_format) {
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fatal_error("Failed to find a suitable pixel format.");
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}
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if (!SetPixelFormat(dummy_dc, pixel_format, &pfd)) {
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fatal_error("Failed to set the pixel format.");
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}
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HGLRC dummy_context = wglCreateContext(dummy_dc);
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if (!dummy_context) {
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fatal_error("Failed to create a dummy OpenGL rendering context.");
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}
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if (!wglMakeCurrent(dummy_dc, dummy_context)) {
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fatal_error("Failed to activate dummy OpenGL rendering context.");
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}
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wglCreateContextAttribsARB = (wglCreateContextAttribsARB_type*)wglGetProcAddress("wglCreateContextAttribsARB");
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wglChoosePixelFormatARB = (wglChoosePixelFormatARB_type*)wglGetProcAddress("wglChoosePixelFormatARB");
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wglMakeCurrent(dummy_dc, 0);
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wglDeleteContext(dummy_context);
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ReleaseDC(dummy_window, dummy_dc);
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DestroyWindow(dummy_window);
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}
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static HGLRC
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init_opengl(HDC real_dc)
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{
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init_opengl_extensions();
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// Now we can choose a pixel format the modern way, using wglChoosePixelFormatARB.
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int pixel_format_attribs[] = {
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WGL_DRAW_TO_WINDOW_ARB, GL_TRUE,
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WGL_SUPPORT_OPENGL_ARB, GL_TRUE,
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WGL_DOUBLE_BUFFER_ARB, GL_TRUE,
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WGL_ACCELERATION_ARB, WGL_FULL_ACCELERATION_ARB,
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WGL_PIXEL_TYPE_ARB, WGL_TYPE_RGBA_ARB,
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WGL_COLOR_BITS_ARB, 32,
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WGL_DEPTH_BITS_ARB, 24,
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WGL_STENCIL_BITS_ARB, 8,
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0
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};
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int pixel_format;
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UINT num_formats;
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wglChoosePixelFormatARB(real_dc, pixel_format_attribs, 0, 1, &pixel_format, &num_formats);
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if (!num_formats) {
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fatal_error("Failed to set the OpenGL 3.3 pixel format.");
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}
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PIXELFORMATDESCRIPTOR pfd;
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DescribePixelFormat(real_dc, pixel_format, sizeof(pfd), &pfd);
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if (!SetPixelFormat(real_dc, pixel_format, &pfd)) {
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fatal_error("Failed to set the OpenGL 3.3 pixel format.");
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}
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// Specify that we want to create an OpenGL 4.6 core profile context
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int gl33_attribs[] = {
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WGL_CONTEXT_MAJOR_VERSION_ARB, 4,
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WGL_CONTEXT_MINOR_VERSION_ARB, 6,
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WGL_CONTEXT_PROFILE_MASK_ARB, WGL_CONTEXT_CORE_PROFILE_BIT_ARB,
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0,
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};
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HGLRC gl33_context = wglCreateContextAttribsARB(real_dc, 0, gl33_attribs);
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if (!gl33_context) {
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fatal_error("Failed to create OpenGL 3.3 context.");
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}
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if (!wglMakeCurrent(real_dc, gl33_context)) {
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fatal_error("Failed to activate OpenGL 3.3 rendering context.");
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}
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return gl33_context;
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}
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static LRESULT CALLBACK
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window_callback(HWND window, UINT msg, WPARAM wparam, LPARAM lparam)
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{
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LRESULT result = 0;
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switch (msg) {
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case WM_CLOSE:
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case WM_DESTROY:
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PostQuitMessage(0);
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break;
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default:
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result = DefWindowProcA(window, msg, wparam, lparam);
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break;
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}
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return result;
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}
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static HWND
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create_window(HINSTANCE inst)
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{
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WNDCLASSA window_class = {};
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window_class.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
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window_class.lpfnWndProc = window_callback;
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window_class.hInstance = inst;
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window_class.hCursor = LoadCursor(0, IDC_ARROW);
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window_class.hbrBackground = 0;
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window_class.lpszClassName = "WGL_fdjhsklf";
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if (!RegisterClassA(&window_class)) {
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fatal_error("Failed to register window.");
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}
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// Specify a desired width and height, then adjust the rect so the window's client area will be
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// that size.
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RECT rect = { };
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rect.right = 1024;
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rect.bottom = 576;
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DWORD window_style = WS_OVERLAPPEDWINDOW;
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AdjustWindowRect(&rect, window_style, false);
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HWND window = CreateWindowExA(
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0,
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window_class.lpszClassName,
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"OpenGL",
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window_style,
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CW_USEDEFAULT,
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CW_USEDEFAULT,
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rect.right - rect.left,
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rect.bottom - rect.top,
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0,
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0,
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inst,
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0);
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if (!window) {
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fatal_error("Failed to create window.");
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}
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return window;
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}
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int WINAPI
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WinMain(HINSTANCE inst, HINSTANCE prev, LPSTR cmd_line, int show)
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{
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HWND window = create_window(inst);
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HDC gldc = GetDC(window);
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HGLRC glrc = init_opengl(gldc);
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ShowWindow(window, show);
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UpdateWindow(window);
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bool running = true;
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while (running) {
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MSG msg;
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while (PeekMessageA(&msg, 0, 0, 0, PM_REMOVE)) {
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if (msg.message == WM_QUIT) {
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running = false;
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}
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else {
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TranslateMessage(&msg);
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DispatchMessageA(&msg);
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}
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}
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glClearColor(1.0f, 0.5f, 0.5f, 1.0f);
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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// Do OpenGL rendering here
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SwapBuffers(gldc);
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}
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return 0;
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}
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#endif
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Reference in New Issue
Block a user