opengl纹理贴图源码

#include "ggl.h" #include "scene.h" #pragma comment(lib,"opengl32.lib") #pragma comment(lib,"glu32.lib") //LRESULT CAllBACK GLWindowProc(HWND hwnd,UINT msg,WPARAM wParam,LPARAM lParam) //{ // switch(msg) // { // case WM_CLOSE: // PostQuitMessage(0); // return 0; // } // return DefWindowProc(hwnd,msg,wParam,lParam); //} unsigned char * LoadFileContent(const char *path, int &filesize) { unsigned char*fileContent = nullptr; filesize = 0; FILE*pFile = fopen(path, "rb"); if (pFile) { fseek(pFile, 0, SEEK_END); int nLen = ftell(pFile); if (nLen > 0) { rewind(pFile); fileContent = new unsigned char[nLen + 1]; fread(fileContent, sizeof(unsigned char), nLen, pFile); fileContent[nLen] = '\0'; filesize = nLen; } fclose(pFile); } return fileContent; } LRESULT CALLBACK GLWindowProc(HWND hwnd,UINT msg,WPARAM wParam,LPARAM lParam) { switch(msg) { case WM_CLOSE: PostQuitMessage(0); return 0; } return DefWindowProc(hwnd,msg,wParam,lParam); } INT WINAPI WinMain(HINSTANCE hinstance,HINSTANCE hPreInstance,LPSTR IpCmdLine,int nShowCmd) { //注册窗口 WNDCLASSEX wndclass; wndclass.cbClsExtra=0;//额外空间 wndclass.cbSize=sizeof(WNDCLASSEX); //实际空间 wndclass.cbWndExtra=0;//额外内存 wndclass.hbrBackground=NULL;//背景设置 wndclass.hCursor=LoadCursor(NULL,IDC_ARROW);//光标设置为箭头 wndclass.hIcon=NULL; //程序图标 wndclass.hIconSm=NULL; // wndclass.hInstance=hinstance; wndclass.lpfnWndProc=GLWindowProc; //用户操作 wndclass.lpszClassName=L"GLWindow"; //注册窗口名称 wndclass.lpszMenuName=NULL;//菜单名称 wndclass.style= CS_VREDRAW|CS_HREDRAW; //重绘时采用的方式 垂直或者水平方式 ATOM atom =RegisterClassEx(&wndclass); //窗口注册 if(!atom) { MessageBox(NULL,L"Notice",L"error",MB_OK); } //控制视口大小 RECT rect; rect.left=0; rect.right=800; rect.top=0; rect.bottom =600; //param1 对视口的需求,paranm2窗口风格 AdjustWindowRect(&rect,WS_OVERLAPPEDWINDOW,NULL); int windowWith=rect.right-rect.left; int windowHerght=rect.bottom-rect.top; //param1,窗口额外风格，param2 窗口名称与注册一直，param3,字符串显示到窗口的标题栏，para4,窗口风格，para56，位置，para:7：宽 ，高， HWND hwnd =CreateWindowEx(NULL,L"GLWindow",L"OPENGL Window",WS_OVERLAPPEDWINDOW,100,100,windowWith,windowHerght,NULL,NULL,hinstance,NULL); ShowWindow(hwnd,SW_SHOW); //选定像素格式-创建渲染环境-使渲染环境生效 //选定像素格式 UpdateWindow(hwnd); HDC dc=GetDC(hwnd); PIXELFORMATDESCRIPTOR pfd; memset(&pfd,0,sizeof(PIXELFORMATDESCRIPTOR)); pfd.nVersion=1; pfd.nSize=sizeof(PIXELFORMATDESCRIPTOR); pfd.cColorBits=32; pfd.cDepthBits=24; pfd.cStencilBits=8; pfd.iPixelType=PFD_TYPE_RGBA; pfd.dwFlags=PFD_DRAW_TO_WINDOW|PFD_SUPPORT_OPENGL|PFD_DOUBLEBUFFER; int pixFormat = ChoosePixelFormat(dc,&pfd); SetPixelFormat(dc,pixFormat,&pfd); //创建渲染环境 HGLRC rc = wglCreateContext(dc); //使渲染环境生效 wglMakeCurrent(dc,rc); Init(); //持续工作 MSG msg; while(true) { //获取消息队列里的消息 //param 5,从消息队列中移除 if(PeekMessage(&msg,NULL,NULL,NULL,PM_REMOVE)) { if(msg.message==WM_QUIT) //如果关闭消息就跳出 { break; } TranslateMessage(&msg); DispatchMessage(&msg); //派发消息 } Draw(); SwapBuffers(dc); } return 0; }