windows屏幕保护opengl程序模板

Visual Studio 2013 屏幕保护程序opengl模板

ScreenSaver.cpp

#define VC_EXTRALEAN

#include <windows.h>
#include <commctrl.h>
#include <scrnsave.h>

#include <time.h>
#include <math.h>
#include <string>
#include <time.h>

#include "resource.h"

#include <gl\GLU.h>
#include <gl\GL.h>
#pragma comment(lib, "opengl32.lib")
#pragma comment(lib, "glu32.lib")

#pragma comment(lib, "scrnsavw.lib")
#pragma comment (lib, "comctl32.lib")

bool SetupOpenGL();

void KillGL();

void DrawGLScene();

HDC					hDC = NULL;
HGLRC				hRC = NULL;
HWND				hWnd = NULL;
HINSTANCE			hInstance;

int uTimer;

LONG WINAPI ScreenSaverProc(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam)
{
// 处理屏幕保护消息
switch (message)
{
case WM_CREATE:
// 创建屏幕保护窗口消息 最先执行
hWnd = hwnd;
SetupOpenGL();
// 设置定时器 (间隔为16毫秒，为了每分钟刷新60次 (1000/60 = 16)
uTimer = SetTimer(hwnd, 1, 16, NULL);
return 0;

case WM_ERASEBKGND:
// 清除屏幕保护背景
// opengl不使用
return 0;

case WM_TIMER:
// 定时器消息
DrawGLScene();
return 0;

case WM_DESTROY:
// 销毁
KillTimer(hwnd, uTimer);
KillGL();
PostQuitMessage(0);
return 0;
}
return DefScreenSaverProc(hwnd, message, wparam, lparam);
}

BOOL WINAPI ScreenSaverConfigureDialog(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam)
{
return true;
}

BOOL WINAPI RegisterDialogClasses(HANDLE hmodule)
{
return true;
}

bool SetupOpenGL()
{
GLuint PixelFormat;

int width;
int height;

width = GetDeviceCaps(GetDC(NULL), HORZRES);
height = GetDeviceCaps(GetDC(NULL), VERTRES);

RECT		WindowRect;
WindowRect.left = (long)0;
WindowRect.right = (long)width;
WindowRect.top = (long)0;
WindowRect.bottom = (long)height;

//设置opengl上下文
static	PIXELFORMATDESCRIPTOR pfd =
{
sizeof(PIXELFORMATDESCRIPTOR),
1,
PFD_DRAW_TO_WINDOW |
PFD_SUPPORT_OPENGL |
PFD_DOUBLEBUFFER,
PFD_TYPE_RGBA,
24,
0, 0, 0, 0, 0, 0,
0,
0,
0,
0, 0, 0, 0,
16,
0,
0,
PFD_MAIN_PLANE,
0,
0, 0, 0
};

if (!(hDC = GetDC(hWnd)))
{
KillGL();
MessageBox(NULL, TEXT("Can't Create A GL Device Context."), TEXT("ERROR"), MB_OK | MB_ICONEXCLAMATION);
return FALSE;
}

if (!(PixelFormat = ChoosePixelFormat(hDC, &pfd)))
{
KillGL();
MessageBox(NULL, TEXT("Can't Find A Suitable PixelFormat."), TEXT("ERROR"), MB_OK | MB_ICONEXCLAMATION);
return FALSE;
}

if (!SetPixelFormat(hDC, PixelFormat, &pfd))
{
KillGL();
MessageBox(NULL, TEXT("Can't Set The PixelFormat."), TEXT("ERROR"), MB_OK | MB_ICONEXCLAMATION);
return FALSE;
}

if (!(hRC = wglCreateContext(hDC)))
{
KillGL();
MessageBox(NULL, TEXT("Can't Create A GL Rendering Context."), TEXT("ERROR"), MB_OK | MB_ICONEXCLAMATION);
return FALSE;
}

if (!wglMakeCurrent(hDC, hRC))
{
KillGL();
MessageBox(NULL, TEXT("Can't Activate The GL Rendering Context."), TEXT("ERROR"), MB_OK | MB_ICONEXCLAMATION);
return FALSE;
}

//透视矩阵
if (height == 0){ height = 1; }
glViewport(0, 0, width, height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(45.0f, (GLfloat)width / (GLfloat)height, 0.1f, 100.0f);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();

//初始化opengl一些参数
glShadeModel(GL_SMOOTH);
glClearColor(0.0f, 0.0f, 0.0f, 0.5f);
glClearDepth(1.0f);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LEQUAL);
glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);

return TRUE;
}

void KillGL(GLvoid){
ChangeDisplaySettings(NULL, 0);					// If So Switch Back To The Desktop
if (hRC){										// Do We Have A Rendering Context?
wglMakeCurrent(NULL, NULL);					// Release The DC And RC Contexts
wglDeleteContext(hRC);						// Delete The RC
hRC = NULL;									// Set RC To NULL
}
ReleaseDC(hWnd, hDC);							// Release The DC
}

void DrawGLScene()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity();

glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
glTranslatef(-1.5f, 0.0f, -6.0f);
glBegin(GL_TRIANGLES);
glVertex3f(0.0f, 1.0f, 0.0f);
glVertex3f(-1.0f, -1.0f, 0.0f);
glVertex3f(1.0f, -1.0f, 0.0f);
glEnd();
glTranslatef(3.0f, 0.0f, 0.0f);
glBegin(GL_QUADS);
glVertex3f(-1.0f, 1.0f, 0.0f);
glVertex3f(1.0f, 1.0f, 0.0f);
glVertex3f(1.0f, -1.0f, 0.0f);
glVertex3f(-1.0f, -1.0f, 0.0f);
glEnd();

SwapBuffers(hDC);
}

模板代码托管在 https://github.com/tiancode/windows_opengl_screensaver_template