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/*
* zoom.cpp
*
* Copyright (C) 2009 Matthias Schiffer <matthias@gamezock.de>
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by the
* Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "Game.h"
#include "MathUtil.h"
#include "config.h"
#include "gl.h"
#include <cstdio>
#ifdef _WIN32
#else
#include <iostream>
#include <X11/X.h>
#include <X11/extensions/XInput2.h>
#include <GL/glx.h>
#include <sys/time.h>
#include <unistd.h>
#endif
#ifdef _WIN32
bool WGLInit(HINSTANCE hInstance, HWND *hWnd, HDC *hDC, HGLRC *hRC);
void WGLUninit(HWND hWnd, HDC hDC, HGLRC hRC);
LRESULT CALLBACK wndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
bool WGLInit(HINSTANCE hInstance, HWND *hWnd, HDC *hDC, HGLRC *hRC) {
WNDCLASS wc;
wc.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
wc.lpfnWndProc = (WNDPROC)wndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = hInstance;
wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = 0;
wc.lpszMenuName = 0;
wc.lpszClassName = "Zoom";
if (!RegisterClass(&wc)) {
MessageBox(0, "Failed To Register The Window Class.", "ERROR", MB_OK|MB_ICONEXCLAMATION);
return false;
}
DWORD dwExStyle = WS_EX_APPWINDOW | WS_EX_WINDOWEDGE;
DWORD dwStyle = WS_OVERLAPPEDWINDOW;
RECT windowRect;
windowRect.left = 0;
windowRect.right = DEFAULT_WIDTH;
windowRect.top = 0;
windowRect.bottom = DEFAULT_HEIGHT;
AdjustWindowRectEx(&windowRect, dwStyle, FALSE, dwExStyle);
*hWnd = CreateWindowEx(dwExStyle, "Zoom" /* Class Name */, "Zoom" /* Title*/, WS_CLIPSIBLINGS | WS_CLIPCHILDREN | dwStyle,
0, 0, windowRect.right-windowRect.left, windowRect.bottom-windowRect.top, 0, 0, hInstance, 0);
if(!*hWnd) {
MessageBox(0, "Window Creation Error.", "ERROR", MB_OK|MB_ICONEXCLAMATION);
return false;
}
static PIXELFORMATDESCRIPTOR pfd = {
sizeof(PIXELFORMATDESCRIPTOR), // Size Of This Pixel Format Descriptor
1, // Version Number
PFD_DRAW_TO_WINDOW | // Format Must Support Window
PFD_SUPPORT_OPENGL | // Format Must Support OpenGL
PFD_DOUBLEBUFFER, // Must Support Double Buffering
PFD_TYPE_RGBA, // Request An RGBA Format
16, // Select Our Color Depth
0, 0, 0, 0, 0, 0, // Color Bits Ignored
0, // No Alpha Buffer
0, // Shift Bit Ignored
0, // No Accumulation Buffer
0, 0, 0, 0, // Accumulation Bits Ignored
16, // 16Bit Z-Buffer (Depth Buffer)
0, // No Stencil Buffer
0, // No Auxiliary Buffer
PFD_MAIN_PLANE, // Main Drawing Layer
0, // Reserved
0, 0, 0 // Layer Masks Ignored
};
*hDC=GetDC(*hWnd);
if (!*hDC) {
WGLUninit(*hWnd, 0, 0);
MessageBox(0, "Can't Create A GL Device Context.", "ERROR", MB_OK|MB_ICONEXCLAMATION);
return false;
}
GLuint pixelFormat = ChoosePixelFormat(*hDC, &pfd);
if(!pixelFormat) {
WGLUninit(*hWnd, *hDC, 0);
MessageBox(0, "Can't Find A Suitable PixelFormat.", "ERROR", MB_OK|MB_ICONEXCLAMATION);
return false;
}
if(!SetPixelFormat(*hDC, pixelFormat, &pfd)) {
WGLUninit(*hWnd, *hDC, 0);
MessageBox(0, "Can't Set The PixelFormat.", "ERROR", MB_OK|MB_ICONEXCLAMATION);
return false;
}
*hRC=wglCreateContext(*hDC);
if(!*hRC) {
WGLUninit(*hWnd, *hDC, 0);
MessageBox(0, "Can't Create A GL Rendering Context.", "ERROR", MB_OK|MB_ICONEXCLAMATION);
return false;
}
if(!wglMakeCurrent(*hDC, *hRC)) {
WGLUninit(*hWnd, *hDC, *hRC);
MessageBox(0, "Can't Activate The GL Rendering Context.", "ERROR", MB_OK|MB_ICONEXCLAMATION);
return false;
}
ShowWindow(*hWnd, SW_SHOW);
SetForegroundWindow(*hWnd);
SetFocus(*hWnd);
return true;
}
void WGLUninit(HWND hWnd, HDC hDC, HGLRC hRC) {
wglMakeCurrent(0, 0);
if(hRC)
wglDeleteContext(hRC);
if(hDC)
ReleaseDC(hWnd, hDC);
if(hWnd)
DestroyWindow(hWnd);
}
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) {
HWND hWnd = 0;
HDC hDC = 0;
HGLRC hRC = 0;
if(!WGLInit(hInstance, &hWnd, &hDC, &hRC)) {
return 0;
}
glewInit();
resize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
bool running = true;
MSG msg;
while(running) {
unsigned long delta = 0;
unsigned long ticks = GetTickCount();
while(PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
if(msg.message == WM_QUIT)
{
running = false;
break;
}
else // If Not, Deal With Window Messages
{
TranslateMessage(&msg); // Translate The Message
DispatchMessage(&msg); // Dispatch The Message
}
}
delta = GetTickCount()-ticks;
if(delta < MIN_FRAME_DELTA) {
Sleep(MIN_FRAME_DELTA - delta);
delta = GetTickCount()-ticks;
}
ticks += delta;
static DisplayClass render;
render.renderScene(delta);
SwapBuffers(hDC);
}
WGLUninit(hWnd, hDC, hRC);
return msg.wParam;
}
LRESULT CALLBACK wndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {
switch(uMsg) {
case WM_CLOSE:
PostQuitMessage(0);
return 0;
case WM_SIZE:
resize(LOWORD(lParam), HIWORD(lParam));
return 0;
default:
return DefWindowProc(hWnd, uMsg, wParam, lParam);
}
}
#else
bool XIInit(Display *disp, int *opcode) {
int event, error;
if (!XQueryExtension(disp, "XInputExtension", opcode, &event, &error)) {
std::cerr << "X Input extension not available." << std::endl;
return false;
}
int major = 2, minor = 0;
if (XIQueryVersion(disp, &major, &minor) == BadRequest) {
std::cerr << "XI2 not available. Server supports " << major << "." << minor << std::endl;
return false;
}
return true;
}
bool GLXinit(Display *disp, Atom windele, Window *wnd, GLXContext *gc, int *xi_opcode, int *pointer) {
static const int msAttributeList[] = {GLX_RENDER_TYPE, GLX_RGBA_BIT,
GLX_DRAWABLE_TYPE, GLX_WINDOW_BIT,
GLX_X_RENDERABLE, True,
GLX_DOUBLEBUFFER, True,
GLX_DEPTH_SIZE, 1,
GLX_STENCIL_SIZE, 1,
GLX_SAMPLE_BUFFERS, 1,
GLX_SAMPLES, 4,
None};
static const int attributeList[] = {GLX_RENDER_TYPE, GLX_RGBA_BIT,
GLX_DRAWABLE_TYPE, GLX_WINDOW_BIT,
GLX_X_RENDERABLE, True,
GLX_DOUBLEBUFFER, True,
GLX_DEPTH_SIZE, 1,
GLX_STENCIL_SIZE, 1,
None};
if(!XIInit(disp, xi_opcode))
return false;
bool ok = false;
int nElements;
GLXFBConfig *fbConfig = glXChooseFBConfig(disp, DefaultScreen(disp), msAttributeList, &nElements);
if(!fbConfig || !nElements) {
if(fbConfig) {
XFree(fbConfig);
}
fbConfig = glXChooseFBConfig(disp, DefaultScreen(disp), attributeList, &nElements);
}
if(fbConfig && nElements) {
XVisualInfo *vi = glXGetVisualFromFBConfig(disp, *fbConfig);
if(vi) {
Colormap cmap = XCreateColormap(disp, RootWindow(disp, vi->screen), vi->visual, AllocNone);
XSetWindowAttributes swa;
swa.colormap = cmap;
swa.border_pixel = 0;
swa.event_mask = StructureNotifyMask | KeyPressMask | KeyReleaseMask/* | PointerMotionMask | ButtonPressMask | ButtonReleaseMask*/;
*wnd = XCreateWindow(disp, RootWindow(disp, vi->screen), 0, 0, DEFAULT_WIDTH, DEFAULT_HEIGHT, 0, vi->depth, InputOutput,
vi->visual, CWBorderPixel|CWColormap|CWEventMask, &swa);
XClassHint chint;
chint.res_name = const_cast<char*>("Zoom");
chint.res_class = const_cast<char*>("zoom");
XSetClassHint(disp, *wnd, &chint);
char *str = const_cast<char*>("Zoom");
XTextProperty name;
if(XStringListToTextProperty(&str, 1, &name) != 0)
{
XSetWMName(disp, *wnd, &name);
XFree(name.value);
}
XSetWMProtocols(disp, *wnd, &windele, 1);
XColor color;
color.pixel = WhitePixel(disp, vi->screen);
XQueryColor(disp, cmap, &color);
Pixmap pixmap = XCreatePixmap(disp, *wnd, 1, 1, 1);
Cursor cursor = XCreatePixmapCursor(disp, pixmap, pixmap, &color, &color, 0, 0);
XSync(disp, False);
XFreePixmap(disp, pixmap);
XMapWindow(disp, *wnd);
XSync(disp, False);
XIGetClientPointer(disp, *wnd, pointer);
XIEventMask eventmask;
unsigned char mask[4] = {0};
eventmask.deviceid = 2;
eventmask.mask_len = sizeof(mask);
eventmask.mask = mask;
/*XISetMask(mask, XI_ButtonPress);
XISetMask(mask, XI_Motion);
XISetMask(mask, XI_KeyPress);*/
XISetMask(mask, XI_RawMotion);
XIGrabDevice(disp, *pointer, *wnd, CurrentTime, cursor, GrabModeAsync, GrabModeAsync, True, &eventmask);
*gc = glXCreateContext(disp, vi, NULL, True);
glXMakeCurrent(disp, *wnd, *gc);
ok = true;
XFree(vi);
}
}
if(fbConfig)
XFree(fbConfig);
XSync(disp, 0);
return ok;
}
int main() {
Display *disp = XOpenDisplay(0);
Atom windele = XInternAtom(disp, "WM_DELETE_WINDOW", False);
Window wnd;
GLXContext gc;
int xi_opcode;
int pointer;
if(!GLXinit(disp, windele, &wnd, &gc, &xi_opcode, &pointer))
return 1;
glewInit();
Zoom::Game game;
game.resize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
GLint samples;
glGetIntegerv(GL_SAMPLES, &samples);
std::cerr << "Using " << samples << " samples" << std::endl;
bool running = true;
unsigned long delta = 0;
unsigned long frames = 0, tocks = 0;
unsigned input = 0;
struct timeval tv;
gettimeofday(&tv, NULL);
unsigned long ticks = tv.tv_usec;
while(running) {
while(XPending(disp)) {
XEvent event;
XNextEvent(disp, &event);
switch(event.type) {
case ConfigureNotify:
game.resize(event.xconfigure.width, event.xconfigure.height);
break;
case ClientMessage:
if(static_cast<Atom>(event.xclient.data.l[0]) == windele)
running = false;
break;
case KeyPress:
switch(XKeycodeToKeysym(disp, event.xkey.keycode, 0)) {
case XK_Up: case XK_w: input |= Zoom::Game::FORWARD; break;
case XK_Down: case XK_s: input |= Zoom::Game::BACKWARD; break;
case XK_Left: case XK_a: input |= Zoom::Game::LEFT; break;
case XK_Right: case XK_d: input |= Zoom::Game::RIGHT; break;
case XK_Escape: running = false; break;
}
break;
case KeyRelease:
switch(XKeycodeToKeysym(disp, event.xkey.keycode, 0)) {
case XK_Up: case XK_w: input &= ~Zoom::Game::FORWARD; break;
case XK_Down: case XK_s: input &= ~Zoom::Game::BACKWARD; break;
case XK_Left: case XK_a: input &= ~Zoom::Game::LEFT; break;
case XK_Right: case XK_d: input &= ~Zoom::Game::RIGHT; break;
}
break;
case GenericEvent:
if(event.xcookie.extension == xi_opcode && XGetEventData(disp, &event.xcookie)) {
switch(event.xcookie.evtype) {
case XI_RawMotion:
XIRawEvent *rawEvent = reinterpret_cast<XIRawEvent*>(event.xcookie.data);
float deltaX = 0, deltaY = 0;
double *rawValuator = rawEvent->raw_values;
if(rawEvent->valuators.mask_len >= 1) {
if(XIMaskIsSet(rawEvent->valuators.mask, 0)) {
deltaX = (float)*rawValuator;
++rawValuator;
}
if(XIMaskIsSet(rawEvent->valuators.mask, 1)) {
deltaY = (float)*rawValuator;
++rawValuator;
}
}
if(deltaX != 0 || deltaY != 0)
game.turn(deltaX, deltaY);
}
XFreeEventData(disp, &event.xcookie);
}
}
}
if(!running) break;
game.setInput(input);
game.run(delta);
game.render();
glXSwapBuffers(disp, wnd);
XSync(disp, 0);
long slept = 0;
gettimeofday(&tv, NULL);
delta = ((tv.tv_usec + 1000000 - ticks)%1000000)/1000;
if(delta < MIN_FRAME_DELTA) {
usleep((MIN_FRAME_DELTA-delta)*1000);
slept += (MIN_FRAME_DELTA-delta);
gettimeofday(&tv, NULL);
delta = ((tv.tv_usec + 1000000 - ticks)%1000000)/1000;
}
ticks = (ticks + delta*1000) % 1000000;
frames++;
tocks += delta*1000;
if(tocks > 1000000) {
std::cerr << frames << " fps; slept a total of " << slept << " ms" << std::endl;
frames = 0;
tocks -= 1000000;
slept = 0;
}
}
XIUngrabDevice(disp, pointer, CurrentTime);
XDestroyWindow(disp, wnd);
glXDestroyContext(disp, gc);
XCloseDisplay(disp);
return 0;
}
#endif
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