OpenGLES---分离窗口和OpenGLES代码
AppProtocol 协议(初始化,绘制,销毁)
AppWin 窗口实现
AppDelegate 实现OpenGLES初始化,绘制,销毁
注释:cocos2dx中抄的(去掉父类中的单例，就这点不太一样，都是一个对象)
-- AppProtocol AppWin 窗口实现 (AppWin.hpp)
#pragma once
#include
#include
class AppProtocol
{
public:
virtual bool ini()=0;//初始化
virtual void renderer()=0;//画
virtual void destroy()=0;//销毁
};
/**
* 1:注册窗口 RegisterClassEx
* 2:创建窗口 CreateWindowEx
* 3:更新显示窗口 ShowWindow
* 4:消息循环 PeekMessage/GetMessage
***/
class AppWin:public AppProtocol
{
public:
AppWin(HINSTANCE hInstance):_hInstance(hInstance){
WNDCLASSEX winClass;
winClass.lpszClassName = _T("CELLWinApp");//窗口名字
winClass.cbSize = sizeof(winClass);
winClass.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;//窗口类型
winClass.lpfnWndProc = wndProc;
winClass.hInstance = hInstance;
winClass.hIcon = 0;//图标
winClass.hIconSm = 0;
winClass.hCursor = LoadCursor(hInstance, IDC_ARROW);//鼠标样式
winClass.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
winClass.lpszMenuName = NULL;//窗口菜单
winClass.cbClsExtra = 0;
winClass.cbWndExtra = 0;
//1：注册窗口
RegisterClassEx(&winClass);
}
virtual~AppWin(void){
UnregisterClass(_T("CELLWinApp"),_hInstance);
}
virtual LRESULT onEvent(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam){
switch (msg){ //处理得到的消息
case WM_CLOSE:
case WM_DESTROY://处理窗口关闭时的消息
{
::PostQuitMessage(0);
}
break;
case WM_LBUTTONDOWN: //鼠标左键被按下的消息
break;
case WM_RBUTTONDOWN://鼠标右键被按下的消息
break;
case WM_MOUSEMOVE://鼠标移动
break;
case WM_KEYDOWN://监听键盘按键
switch (wParam){
case VK_LEFT:
break;
default:
break;
}
break;
default:
return DefWindowProc( hWnd, msg, wParam, lParam );
}
return S_OK;
}
static LRESULT CALLBACK wndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam){
AppWin* pThis = (AppWin*)GetWindowLong(hWnd,GWL_USERDATA);
if (pThis)
{
return pThis->onEvent(hWnd,msg,wParam,lParam);
}
if (WM_CREATE == msg)
{
CREATESTRUCT* pCreate = (CREATESTRUCT*)lParam;
DWORD_PTR pCreateParams = (DWORD_PTR)pCreate->lpCreateParams;
SetWindowLong(hWnd,GWL_USERDATA,pCreateParams);
}
return DefWindowProc( hWnd, msg, wParam, lParam );
}
int main(int wWidth,int wHegith){
//2：创建窗口
_hWnd = CreateWindowEx( NULL, _T("CELLWinApp"), _T("CELLWinApp"), WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, wWidth, wHegith, NULL, NULL, _hInstance,this );
if (_hWnd == 0) {
return -1;
}
//3:更新显示窗口
ShowWindow(_hWnd,SW_SHOW);//SW_MAXIMIZE(扩大窗口),SW_SHOW
if(!ini()){
return 0;
}
//4:消息循环
MSG msg = {0};
while(msg.message != WM_QUIT){ //消息不等于退出
if (msg.message == WM_DESTROY || msg.message == WM_CLOSE){
break;
}
//有消息，处理消息，无消息，则进行渲染绘制
if( PeekMessage( &msg, NULL, 0, 0, PM_REMOVE ) ){
TranslateMessage( &msg );//消息处理
DispatchMessage( &msg );//分发给当前程序
}else{
//绘制
renderer();
}
}
destroy();
return 0;
}
private:
HINSTANCE _hInstance; //实例句柄
protected:
HWND _hWnd; //窗口句柄
public:
};
-- 实现OpenGLES初始化,绘制,销毁 (AppDelegate.hpp)
#include "AppWin.hpp"
#include
#include
#include "freeImage/FreeImage.h"
class AppDelegate :public AppWin
{
public:
AppDelegate(HINSTANCE hInstance):AppWin(hInstance){}
virtual ~AppDelegate(){}
bool ini(){
//1:获取 Display
_display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
//2:初始化 egl
EGLint major;//返回主版本号
EGLint minor;//返回次版本号
eglInitialize(_display, &major, &minor);
//3:选择 Config
const EGLint attribs[] ={
//属性是一对一的初始化(类似与key->value)
EGL_SURFACE_TYPE, EGL_WINDOW_BIT,//把数据画到窗口上
EGL_BLUE_SIZE, 8,//R 占8个比特位
EGL_GREEN_SIZE, 8,//G 占8个比特位
EGL_RED_SIZE, 8, //B 占8个比特位
EGL_DEPTH_SIZE,24,//深度值 占24个比特位 画图的深度值 （前后顺序的层）
EGL_NONE //这个机构结束了
};
EGLint format(0);
EGLint numConfigs(0);
//让EGL为你选择一个配置
eglChooseConfig(_display, attribs, &_config, 1, &numConfigs);
//可以查询某个配置的某个属性
eglGetConfigAttrib(_display, _config, EGL_NATIVE_VISUAL_ID, &format);
//4:创建 Surface
_surface = eglCreateWindowSurface(_display, _config, _hWnd, NULL);
//5:创建上下文对象
EGLint attr[] ={ EGL_CONTEXT_CLIENT_VERSION, 2, EGL_NONE, EGL_NONE };
//创建上下文对象
EGLContext _context = eglCreateContext(_display, _config, EGL_NO_CONTEXT, attr);
//6:查看 Display Surface Context 是否创建成功
if (eglMakeCurrent(_display, _surface, _surface, _context) == EGL_FALSE){
return false;
}
//查询Suface的属性 获取Suface中的宽高
eglQuerySurface(_display, _surface, EGL_WIDTH, &_width);
eglQuerySurface(_display, _surface, EGL_HEIGHT, &_height);
return true;
}
void destroy(){
if (_display != EGL_NO_DISPLAY){//当前的Display 不等于null
//清楚绑定的 Surface Context
eglMakeCurrent(_display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
if (_context != EGL_NO_CONTEXT){//不等于空Context
//销毁上下文
eglDestroyContext(_display, _context);
}
if (_surface != EGL_NO_SURFACE){//不等于空Surface
//销毁Surface
eglDestroySurface(_display, _surface);
}
//终止Dispay
eglTerminate(_display);
}
//把 Display Context Surface 设置成初始化
_display = EGL_NO_DISPLAY;
_context = EGL_NO_CONTEXT;
_surface = EGL_NO_SURFACE;
}
void renderer(){
//glDrawArrays(GL_TRIANGLE_STRIP,0,0);
glClearColor(0,0,1,1);//刷屏
//清除颜色GL_COLOR_BUFFER_BIT 和 清除深度值GL_DEPTH_BUFFER_BIT
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glViewport(0,0,_width,_height);//绘制区域
eglSwapBuffers(_display,_surface);
}
protected:
int _width; // 视口 宽度
int _height;// 视口 高度
EGLDisplay _display;
EGLContext _context;
EGLSurface _surface;
EGLConfig _config;
}; -- 调用(main.cpp)
#include "AppDelegate.hpp"
int APIENTRY _tWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR lpCmdLine, int nCmdShow)
{
UNREFERENCED_PARAMETER(hPrevInstance);
UNREFERENCED_PARAMETER(hInstance);
UNREFERENCED_PARAMETER(lpCmdLine);
UNREFERENCED_PARAMETER(nCmdShow);
AppDelegate app(hInstance);
app.main(800,600);
return 0;
}