| b23636c9 |
// Micro-GLUT, bare essentials
// By Ingemar Ragnemalm 2012
// I wrote this since GLUT seems not to have been updated to support
// creation of a 3.2 context on the Mac. You can use FreeGLUT
// which has this support, but I felt I wanted something without the old-style
// material, and that is small enough to include as a single source file.
// 120309 First Win32 version. Incomplete, lacks timers and more. Also, most settings are not supported.
// 130204 Tried to add GL3 and GLEW. No success.
// Forgotten for too long...
// 1508013 Running with all current utities and GLEW, with the psychedelic teapot demo!
// Timers and rescaling enabled, needs testing.
// 150817: Timers and rescaling runs fine!
// Menus and warp pointer are missing, but this looks good enough for "first beta version"!
// Tested mainly with the Psychedelic Teapot example.
// 150919 Added the very useful glutKeyIsDown plus support for key up events.
// 150920: glutInitWindowPosition and glutInitWindowSize are now working
// 150923: Keyboard events now report ASCII values instead of virtual codes. Also, various special keys like arrow keys should work.
// Finally, I have taken some steps to make special key callbacks obsolete by smarter mapping of special keys.
// 151203: Added a stdio window.
// 160222: Fixed a bug affecting glutKeyIsDown (a very important call which works better now).
// 1602??: Added glutWarpPointer, glutHideCursor, glutShowCursor.
// 160309: Added glutFullScreen, glutExitFullScreen, glutToggleFullScreen.
// 170221: Added glutPositionWindow, glutReshapeWindow. Changed default behavior on resize.
// 170913: Added glutMouseIsDown, corrected support for glutMotionFunc (dragging).
// 200405: Added BeginPaint etc as response to WM_PAINT to make Windows stop sending PAINT repeatedly.
// Also avoided having events blocking timers in the event loop.
// 210524: Important overhaul! After removing WinMain and moving its functionality to glutInit,
// MicroGlut now works with MinGW, and outputs printf's properly! I also moved glewInit into MicroGlut
// to reduce/remove system dependencies from your code. This means MinGW (DevC++ etc) in, Visual Studio OUT!
// Visual Studio's inability to printf is unbearable and MinGW is a lot better.
// 210524: Added glutMotionFunc in the header file.
// 210530: Temporary fix for the window size. It is not how I want it to be but it looks OK and will have to do for now.
// 220112: Added support for modifier keys
#include <windows.h>
#include "glew.h"
#include <gl/gl.h>
#include "MicroGlut.h"
#include <stdio.h>
#include <io.h>
#include <fcntl.h>
#ifndef _WIN32
This line causes an error if you are not using Windows. It means that you are accidentally compiling the Windows version.
Have a look at your paths.
#endif
// Vital internal variables
void (*gDisplay)(void);
void (*gReshape)(int width, int height);
void (*gKey)(unsigned char key, int x, int y);
void (*gKeyUp)(unsigned char key, int x, int y);
void (*gSpecialKey)(unsigned char key, int x, int y); // I consider this obsolete!
void (*gSpecialKeyUp)(unsigned char key, int x, int y); // I consider this obsolete!
void (*gMouseMoved)(int x, int y);
void (*gMouseDragged)(int x, int y);
void (*gMouseFunc)(int button, int state, int x, int y);
unsigned int gContextInitMode = GLUT_RGBA | GLUT_DOUBLE | GLUT_DEPTH;
void (*gIdle)(void);
char updatePending = 1;
char gRunning = 1;
int gContextVersionMajor = 0;
int gContextVersionMinor = 0;
char gKeymap[256];
char gButtonPressed[10] = {0,0,0,0,0,0,0,0,0,0};
// Prototype
static void checktimers();
// -----------
// Globals (was in GLViewDataPtr)
//NSOpenGLContext *m_context;
float lastWidth, lastHeight;
//NSView *theView;
HWND hWnd;
HDC hDC;
HGLRC hRC;
HINSTANCE gInstance;
// Enable OpenGL
void EnableOpenGL(HWND hWnd, HDC * hDC, HGLRC * hRC)
{
PIXELFORMATDESCRIPTOR pfd;
int format;
int zdepth; // , sdepth;
#if defined WGL_CONTEXT_MAJOR_VERSION_ARB
// NOT tested because WGL_CONTEXT_MAJOR_VERSION_ARB is undefined on my computer
int attribs[] =
{
WGL_CONTEXT_MAJOR_VERSION_ARB, 3,
WGL_CONTEXT_MINOR_VERSION_ARB, 2,
WGL_CONTEXT_FLAGS_ARB, 0,
0
};
#endif
// get the device context (DC)
*hDC = GetDC( hWnd );
if (gContextInitMode & GLUT_DEPTH)
zdepth = 32;
else
zdepth = 0;
// Not used yet
// if (gContextInitMode & GLUT_STENCIL)
// sdepth = 32;
// else
// sdepth = 0;
// set the pixel format for the DC
// MUCH OF THIS SHOULD BE OPTIONAL (like depth and stencil above)!
ZeroMemory( &pfd, sizeof( pfd ) );
pfd.nSize = sizeof( pfd );
pfd.nVersion = 1;
pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
pfd.iPixelType = PFD_TYPE_RGBA;
pfd.cColorBits = 24;
pfd.cDepthBits = zdepth;
pfd.iLayerType = PFD_MAIN_PLANE;
format = ChoosePixelFormat( *hDC, &pfd );
SetPixelFormat( *hDC, format, &pfd );
#if defined WGL_CONTEXT_MAJOR_VERSION_ARB
// NOT tested because WGL_CONTEXT_MAJOR_VERSION_ARB is undefined on my computer
// Try to support new OpenGL!
attribs[1] = gContextVersionMajor;
attribs[3] = gContextVersionMinor;
if(wglewIsSupported("WGL_ARB_create_context") == 1)
{
*hRC = wglCreateContextAttribsARB(*hDC,0, attribs);
wglMakeCurrent(*hDC, *hRC);
}
else
{ //It's not possible to make a GL 3.x context. Use the old style context (GL 2.1 and before)
// create and enable the render context (RC)
*hRC = wglCreateContext( *hDC );
wglMakeCurrent( *hDC, *hRC );
}
#else
*hRC = wglCreateContext( *hDC );
wglMakeCurrent( *hDC, *hRC );
#endif
glewInit();
}
// Disable OpenGL
void DisableOpenGL(HWND hWnd, HDC hDC, HGLRC hRC)
{
wglMakeCurrent( NULL, NULL );
wglDeleteContext( hRC );
ReleaseDC( hWnd, hDC );
}
void glutPostRedisplay()
{
updatePending = 1;
}
// ------------------ Main program ---------------------
//MGApplication *myApp;
//NSView *view;
//NSWindow *window;
//static struct timeval timeStart;
int gWindowPosX = 10;
int gWindowPosY = 50;
int gWindowWidth = 400;
int gWindowHeight = 400;
void glutInitWindowPosition (int x, int y)
{
gWindowPosX = x;
gWindowPosY = y;
}
void glutInitWindowSize (int width, int height)
{
gWindowWidth = width;
gWindowHeight = height;
}
void glutCreateWindow(const char *title)
{
/* // Convert title to szTitle!
#define MAX_LOADSTRING 100
TCHAR szTitle[MAX_LOADSTRING]; // The title bar text
int size_needed = MultiByteToWideChar(CP_UTF8, 0, &title[0], strlen(title), NULL, 0);
MultiByteToWideChar(CP_UTF8, 0, &title[0], strlen(title), &szTitle[0], size_needed);
szTitle[size_needed] = 0; // Zero terminate
// Convert class name to szCn!
#define MAX_LOADSTRING 100
char cn[] = "MicroGlutWC";
TCHAR szCn[MAX_LOADSTRING]; // The title bar text
size_needed = MultiByteToWideChar(CP_UTF8, 0, &cn[0], strlen(cn), NULL, 0);
MultiByteToWideChar(CP_UTF8, 0, &cn[0], strlen(cn), &szCn[0], size_needed);
szCn[size_needed] = 0; // Zero terminate
*/
/* RECT r;
r.left = gWindowPosX;
r.top = gWindowPosY;
r.right = gWindowWidth+gWindowPosX;
r.bottom = gWindowHeight+gWindowPosY;
r.left = 0;
r.top = 0;
r.right = gWindowWidth;
r.bottom = gWindowHeight;
AdjustWindowRect(&r, WS_CAPTION | WS_POPUPWINDOW, 0);
*/
// Grabbed from FreeGLUT since AdjustWindowRect did not work for me
// create main window
int h = GetSystemMetrics(SM_CYCAPTION) + GetSystemMetrics(SM_CXDLGFRAME)*2 + gWindowHeight;
int w = GetSystemMetrics(SM_CXDLGFRAME)*2 + gWindowWidth;
// Same window settings as QuakeII
// WS_BORDER WS_DLGFRAME WS_CLIPSIBLINGS
// hWnd = CreateWindowEx(WS_EX_APPWINDOW,
// g_appName, title,
// WS_BORDER | WS_DLGFRAME | WS_CLIPSIBLINGS,
// CW_USEDEFAULT, CW_USEDEFAULT, w, h,
// NULL, NULL, g_hMainInst, NULL);
// This is with a +10 offset which gives the proper size. I am not happy with this but it will have to do for now since none of
// the "real" methods gave the right result.
hWnd = CreateWindow("MicroGlutWC", title,
WS_CAPTION | WS_POPUPWINDOW | WS_VISIBLE | WS_OVERLAPPEDWINDOW,
gWindowPosX, gWindowPosY, w+10, h+10,
NULL, NULL, gInstance, NULL);
/*
hWnd = CreateWindow(
// szCn, szTitle,
"MicroGlutWC", title,
WS_CAPTION | WS_POPUPWINDOW | WS_VISIBLE | WS_OVERLAPPEDWINDOW, // WS_OVERLAPPEDWINDOW gives rescalable window
// 0, 0, 256, 256,
// r.left, r.top, r.right-r.left, r.bottom-r.top,
// gWindowPosX, gWindowPosY, r.right-r.left, r.bottom-r.top,
gWindowPosX, gWindowPosY, gWindowWidth + 16, gWindowHeight + 39, // Hard-coded because I get AdjustWindowRect wrong
NULL, NULL, gInstance, NULL );
if (hWnd == NULL)
printf("No window\n");
*/
// enable OpenGL for the window
EnableOpenGL( hWnd, &hDC, &hRC );
}
void glutMainLoop()
{
BOOL quit = 0;
MSG msg;
// program main loop
while ( !quit )
{
// check for messages
if ( PeekMessage( &msg, NULL, 0, 0, PM_REMOVE ) )
{
// handle or dispatch messages
if ( msg.message == WM_QUIT )
{
quit = TRUE;
}
else
{
TranslateMessage( &msg );
DispatchMessage( &msg );
}
}
// else - SKIPPED in order not to have events blocking timers
{
if (updatePending)
{
gDisplay();
updatePending = 0;
}
if (gIdle)
gIdle();
// TIMERS!
checktimers();
}
}
}
// This won't work yet
//void glutCheckLoop()
//{
//}
void glutDisplayFunc(void (*func)(void))
{
gDisplay = func;
}
void glutReshapeFunc(void (*func)(int width, int height))
{
gReshape = func;
if (func != NULL)
gReshape(gWindowWidth, gWindowHeight);
}
void glutKeyboardFunc(void (*func)(unsigned char key, int x, int y))
{
gKey = func;
}
void glutKeyboardUpFunc(void (*func)(unsigned char key, int x, int y))
{
gKeyUp = func;
}
// I consider this obsolete!
void glutSpecialFunc(void (*func)(unsigned char key, int x, int y))
{
gSpecialKey = func;
}
// I consider this obsolete!
void glutSpecialUpFunc(void (*func)(unsigned char key, int x, int y))
{
gSpecialKeyUp = func;
}
void glutPassiveMotionFunc(void (*func)(int x, int y))
{
gMouseMoved = func;
}
void glutMotionFunc(void (*func)(int x, int y))
{
gMouseDragged = func;
}
void glutMouseFunc(void (*func)(int button, int state, int x, int y))
{
gMouseFunc = func;
}
// You can safely skip this
void glutSwapBuffers()
{
SwapBuffers(hDC);
}
int glutGet(int type)
{
// struct timeval tv;
// gettimeofday(&tv, NULL);
// return (tv.tv_usec - timeStart.tv_usec) / 1000 + (tv.tv_sec - timeStart.tv_sec)*1000;
return GetTickCount();
}
void glutInitDisplayMode(unsigned int mode)
{
gContextInitMode = mode;
}
void glutIdleFunc(void (*func)(void))
{
gIdle = func;
}
char glutKeyIsDown(unsigned char c)
{
if (c == GLUT_KEY_SHIFT)
return ( ( ( GetKeyState( VK_LSHIFT ) < 0 ) ||
( GetKeyState( VK_RSHIFT ) < 0 ) ) );
if (c == GLUT_KEY_CTRL)
return ( ( ( GetKeyState( VK_LCONTROL ) < 0 ) ||
( GetKeyState( VK_RCONTROL ) < 0 ) ) );
if (c == GLUT_KEY_ALT)
return ( ( ( GetKeyState( VK_LMENU ) < 0 ) ||
( GetKeyState( VK_RMENU ) < 0 ) ) );
return gKeymap[c];
}
static unsigned char scan2ascii(WPARAM vk, LPARAM scancode)
{
static HKL layout;
static unsigned char State[256];
int count;
static short unsigned int chars1[2];
layout = GetKeyboardLayout(0);
if (GetKeyboardState(State)==FALSE)
return 0;
count = ToAsciiEx(vk,scancode,State,&chars1[0],0,layout);
if (count > 0) return (char)chars1[0];
else return 0;
}
static void doKeyboardEvent(WPARAM wParam, LPARAM lParam, void (*keyFunc)(unsigned char key, int x, int y), void (specialKeyFunc)(unsigned char key, int x, int y), char keyMapValue)
{
unsigned char c;
switch(wParam)
{
case VK_F1:
c = GLUT_KEY_F1; break;
case VK_F2:
c = GLUT_KEY_F2; break;
case VK_F3:
c = GLUT_KEY_F3; break;
case VK_F4:
c = GLUT_KEY_F4; break;
case VK_F5:
c = GLUT_KEY_F5; break;
case VK_F6:
c = GLUT_KEY_F6; break;
case VK_F7:
c = GLUT_KEY_F7; break;
// F8 and up ignored since they are not possible on some keyboards - like mine
case VK_LEFT:
c = GLUT_KEY_LEFT; break;
case VK_UP:
c = GLUT_KEY_UP; break;
case VK_RIGHT:
c = GLUT_KEY_RIGHT; break;
case VK_DOWN:
c = GLUT_KEY_DOWN; break;
case VK_ESCAPE:
c = GLUT_KEY_ESC; break;
case VK_PRIOR:
c = GLUT_KEY_PAGE_UP; break;
case VK_NEXT:
c = GLUT_KEY_PAGE_DOWN; break;
case VK_HOME:
c = GLUT_KEY_HOME; break;
case VK_END:
c = GLUT_KEY_END; break;
case VK_INSERT:
c = GLUT_KEY_INSERT; break;
default:
c = scan2ascii(wParam,lParam);
if (c == 0) return;
}
if (keyFunc != NULL)
{
keyFunc(c, 0, 0); // TO DO: x and y
}
else
if (specialKeyFunc != NULL && c < 32)
{
specialKeyFunc(c, 0, 0); // TO DO: x and y
}
gKeymap[c] = keyMapValue;
//printf("key %i %i\n", c, keyMapValue);
}
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
int x = LOWORD(lParam);
int y = HIWORD(lParam);
// static char firstTime = 1;
//
// if (firstTime)
// {
// if (gReshape != NULL)
// gReshape(gWindowWidth, gWindowHeight);
// firstTime = 0;
// }
switch (message)
{
case WM_LBUTTONUP:
if (gMouseFunc != NULL)
gMouseFunc(GLUT_LEFT_BUTTON, GLUT_UP, x, y);
gButtonPressed[0] = 0;
break;
case WM_LBUTTONDOWN:
if (gMouseFunc != NULL)
gMouseFunc(GLUT_LEFT_BUTTON, GLUT_DOWN, x, y);
gButtonPressed[0] = 1;
break;
case WM_RBUTTONUP:
if (gMouseFunc != NULL)
gMouseFunc(GLUT_RIGHT_BUTTON, GLUT_UP, x, y);
gButtonPressed[1] = 0;
break;
case WM_RBUTTONDOWN:
if (gMouseFunc != NULL)
gMouseFunc(GLUT_RIGHT_BUTTON, GLUT_DOWN, x, y);
gButtonPressed[1] = 1;
break;
case WM_MOUSEMOVE:
if (gMouseMoved != NULL)
gMouseMoved(x, y);
if (gButtonPressed[0] || gButtonPressed[1])
if (gMouseDragged != NULL)
gMouseDragged(x, y);
break;
case WM_CREATE:
return 0;
case WM_CLOSE:
PostQuitMessage( 0 );
return 0;
case WM_DESTROY:
return 0;
case WM_KEYDOWN:
doKeyboardEvent(wParam, lParam, gKey, gSpecialKey, 1);
return 0;
case WM_KEYUP:
doKeyboardEvent(wParam, lParam, gKeyUp, gSpecialKeyUp, 0);
return 0;
case WM_SIZE:
if (gReshape != NULL)
gReshape(LOWORD(lParam), HIWORD(lParam));
else
{ glViewport(0,0,LOWORD(lParam), HIWORD(lParam));
glutPostRedisplay();
}
break;
case WM_PAINT: // Don't have Windows fighting us while resize!
if (gDisplay)
{
PAINTSTRUCT ps;
BeginPaint(hWnd, &ps); // Added to make Windows stop sending PAINT repeatedly.
OutputDebugStringA("paint\n");
gDisplay();
EndPaint(hWnd, &ps);
updatePending = 0;
}
break;
case WM_ERASEBKGND:
return 1;
break;
default:
return DefWindowProc( hWnd, message, wParam, lParam );
}
return 0;
}
void glutInit(int *argcp, char **argv)
{
int i;
int hCrt;
FILE *hf;
for (i = 0; i < 256; i++) gKeymap[i] = 0;
WNDCLASS wc;
gInstance = GetModuleHandle(NULL);
// register window class
wc.style = CS_OWNDC;
wc.lpfnWndProc = WndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = gInstance;
wc.hIcon = LoadIcon( NULL, IDI_APPLICATION );
wc.hCursor = LoadCursor( NULL, IDC_ARROW );
wc.hbrBackground = (HBRUSH)GetStockObject( BLACK_BRUSH );
wc.lpszMenuName = NULL;
wc.lpszClassName = "MicroGlutWC";
if (!RegisterClass( &wc ))
MessageBox(NULL, "RegisterClass failed", "?", MB_ICONEXCLAMATION | MB_OK);
// Make printf work!
AllocConsole();
hCrt = _open_osfhandle(
//(long)
(long long)GetStdHandle(STD_OUTPUT_HANDLE), // This gives a warning but it works.
_O_TEXT
);
hf = _fdopen( hCrt, "w" );
*stdout = *hf;
i = setvbuf( stdout, NULL, _IONBF, 0 );
*stderr = *hf;
// printf("allocated console and window class\n");
}
void glutClose()
{ /* shutdown OpenGL */
DisableOpenGL (hWnd, hDC, hRC);
/* destroy the window explicitly */
DestroyWindow (hWnd);
// return 0; // msg.wParam;
}
// NOTE: The timer is not designed with any multithreading in mind!
typedef struct TimerRec
{
int arg;
int time;
int repeatTime;
void (*func)(int arg);
char repeating;
struct TimerRec *next;
struct TimerRec *prev;
} TimerRec;
TimerRec *gTimers = NULL;
void glutTimerFunc(int millis, void (*func)(int arg), int arg)
{
TimerRec *t = (TimerRec *)malloc(sizeof(TimerRec));
t->arg = arg;
t->time = millis + glutGet(GLUT_ELAPSED_TIME);
t->repeatTime = 0;
t->repeating = 0;
t->func = func;
t->next = gTimers;
t->prev = NULL;
if (gTimers != NULL)
gTimers->prev = t;
gTimers = t;
}
// Added by Ingemar
void glutRepeatingTimer(int millis)
{
TimerRec *t = (TimerRec *)malloc(sizeof(TimerRec));
t->arg = 0;
t->time = millis + glutGet(GLUT_ELAPSED_TIME);
t->repeatTime = millis;
t->repeating = 1;
t->func = NULL;
t->next = gTimers;
t->prev = NULL;
if (gTimers != NULL)
gTimers->prev = t;
gTimers = t;
}
// From http://stackoverflow.com/questions/5801813/c-usleep-is-obsolete-workarounds-for-windows-mingw
void usleep(__int64 usec)
{
HANDLE timer;
LARGE_INTEGER ft;
ft.QuadPart = -(10*usec); // Convert to 100 nanosecond interval, negative value indicates relative time
timer = CreateWaitableTimer(NULL, TRUE, NULL);
SetWaitableTimer(timer, &ft, 0, NULL, NULL, 0);
WaitForSingleObject(timer, INFINITE);
CloseHandle(timer);
}
static void checktimers()
{
if (gTimers != NULL)
{
TimerRec *t, *firethis = NULL;
int now = glutGet(GLUT_ELAPSED_TIME);
int nextTime = now + 1000; // Distant future, 1 second
t = gTimers;
for (t = gTimers; t != NULL; t = t->next)
{
if (t->time < nextTime) nextTime = t->time; // Time for the next one
if (t->time < now) // See if this is due to fire
{
firethis = t;
}
}
if (firethis != NULL)
{
// Fire the timer
if (firethis->func != NULL)
firethis->func(firethis->arg);
else
glutPostRedisplay();
// Remove the timer if it was one-shot, otherwise update the time
if (firethis->repeating)
{
firethis->time = now + firethis->repeatTime;
}
else
{
if (firethis->prev != NULL)
firethis->prev->next = firethis->next;
else
gTimers = firethis->next;
if (firethis->next != NULL)
firethis->next->prev = firethis->prev;
free(firethis);
}
}
// Otherwise, sleep until any timer should fire
if (!updatePending)
if (nextTime > now)
{
usleep((nextTime - now)*1000);
}
}
else
// If no timer and no update, sleep a little to keep CPU load low
if (!updatePending)
usleep(10);
}
void glutInitContextVersion(int major, int minor)
{
gContextVersionMajor = major;
gContextVersionMinor = minor;
}
void glutHideCursor()
{
ShowCursor(0);
}
void glutShowCursor()
{
ShowCursor(1);
}
void glutWarpPointer(int x, int y)
{
POINT coords;
coords.x = x;
coords.y = y;
ClientToScreen(hWnd, &coords);
SetCursorPos(coords.x, coords.y);
}
// ----------------------------- Full-screen mode support! ---------------------------------
static int savedWidth;
static int savedHeight;
//static int savedColourBits;
//static int savedRefreshRate;
static int savedXPosition;
static int savedYPosition;
// This can be useful if you want to change the resolution.
static int enterFullscreenExt(HWND hwnd, int fullscreenWidth, int fullscreenHeight, int colourBits, int refreshRate)
{
DEVMODE fullscreenSettings;
int isChangeSuccessful=0;
RECT windowBoundary;
GetWindowRect(hwnd, &windowBoundary);
savedWidth = windowBoundary.right - windowBoundary.left;
savedHeight = windowBoundary.bottom - windowBoundary.top;
savedXPosition = windowBoundary.left;
savedYPosition = windowBoundary.top;
EnumDisplaySettings(NULL, 0, &fullscreenSettings);
fullscreenSettings.dmPelsWidth = fullscreenWidth;
fullscreenSettings.dmPelsHeight = fullscreenHeight;
fullscreenSettings.dmBitsPerPel = colourBits;
fullscreenSettings.dmDisplayFrequency = refreshRate;
fullscreenSettings.dmFields = DM_PELSWIDTH |
DM_PELSHEIGHT |
DM_BITSPERPEL |
DM_DISPLAYFREQUENCY;
SetWindowLongPtr(hwnd, GWL_EXSTYLE, WS_EX_APPWINDOW | WS_EX_TOPMOST);
SetWindowLongPtr(hwnd, GWL_STYLE, WS_POPUP | WS_VISIBLE);
SetWindowPos(hwnd, HWND_TOPMOST, 0, 0, fullscreenWidth, fullscreenHeight, SWP_SHOWWINDOW);
// isChangeSuccessful = ChangeDisplaySettings(&fullscreenSettings, CDS_FULLSCREEN) == DISP_CHANGE_SUCCESSFUL;
ShowWindow(hwnd, SW_MAXIMIZE);
return isChangeSuccessful;
}
static int enterFullscreen(HWND hwnd)
{
int fullscreenWidth;
int fullscreenHeight;
int colourBits;
int refreshRate;
HDC windowHDC;
windowHDC = GetDC(hwnd);
fullscreenWidth = GetDeviceCaps(windowHDC, HORZRES);
fullscreenHeight = GetDeviceCaps(windowHDC, VERTRES);
colourBits = GetDeviceCaps(windowHDC, BITSPIXEL);
refreshRate = GetDeviceCaps(windowHDC, VREFRESH);
return enterFullscreenExt(hwnd, fullscreenWidth, fullscreenHeight, colourBits, refreshRate);
}
static int exitFullscreen(HWND hwnd)
{
int isChangeSuccessful;
SetWindowLongPtr(hwnd, GWL_EXSTYLE, WS_EX_LEFT);
SetWindowLongPtr(hwnd, GWL_STYLE, WS_OVERLAPPEDWINDOW | WS_VISIBLE);
isChangeSuccessful = ChangeDisplaySettings(NULL, CDS_RESET) == DISP_CHANGE_SUCCESSFUL;
SetWindowPos(hwnd, HWND_NOTOPMOST, savedXPosition, savedYPosition, savedWidth, savedHeight, SWP_SHOWWINDOW);
ShowWindow(hwnd, SW_RESTORE);
return isChangeSuccessful;
}
int isFullScreen = 0;
void glutFullScreen()
{
if (!isFullScreen)
enterFullscreen(hWnd);
isFullScreen = 1;
}
void glutExitFullScreen()
{
if (isFullScreen)
exitFullscreen(hWnd);
isFullScreen = 0;
}
void glutToggleFullScreen()
{
if (!isFullScreen)
enterFullscreen(hWnd);
else
exitFullscreen(hWnd);
isFullScreen = !isFullScreen;
}
// Added 2017-02-21
void glutPositionWindow(int x, int y)
{
RECT r;
GetWindowRect(hWnd, &r);
MoveWindow(hWnd, x, y, r.right-r.left, r.bottom-r.top, TRUE);
}
void glutReshapeWindow(int width, int height)
{
RECT r;
GetWindowRect(hWnd, &r);
MoveWindow(hWnd, r.left, r.top, width, height, TRUE);
}
char glutMouseIsDown(unsigned int c)
{
return gButtonPressed[c];
}
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