bgfx/examples/common/entry_windows.cpp
2013-03-25 21:13:54 -07:00

642 lines
15 KiB
C++

/*
* Copyright 2011-2013 Branimir Karadzic. All rights reserved.
* License: http://www.opensource.org/licenses/BSD-2-Clause
*/
#include <bx/bx.h>
#if BX_PLATFORM_WINDOWS
#include "entry_p.h"
#include <bx/countof.h>
#include <bx/uint32_t.h>
#include <bx/thread.h>
#include <windowsx.h>
#define DEFAULT_WIDTH 1280
#define DEFAULT_HEIGHT 720
#define WM_USER_SET_WINDOW_SIZE (WM_USER+0)
#define WM_USER_TOGGLE_WINDOW_FRAME (WM_USER+1)
#define WM_USER_MOUSE_LOCK (WM_USER+2)
extern int _main_(int _argc, char** _argv);
namespace entry
{
struct TranslateKeyModifiers
{
int m_vk;
Modifier::Enum m_modifier;
};
static const TranslateKeyModifiers s_translateKeyModifiers[8] =
{
{ VK_LMENU, Modifier::LeftAlt },
{ VK_RMENU, Modifier::RightAlt },
{ VK_LCONTROL, Modifier::LeftCtrl },
{ VK_RCONTROL, Modifier::RightCtrl },
{ VK_LSHIFT, Modifier::LeftShift },
{ VK_RSHIFT, Modifier::RightShift },
{ VK_LWIN, Modifier::LeftMeta },
{ VK_RWIN, Modifier::RightMeta },
};
static uint8_t translateKeyModifiers()
{
uint8_t modifiers = 0;
for (uint32_t ii = 0; ii < countof(s_translateKeyModifiers); ++ii)
{
const TranslateKeyModifiers& tkm = s_translateKeyModifiers[ii];
modifiers |= 0 > GetKeyState(tkm.m_vk) ? tkm.m_modifier : Modifier::None;
}
return modifiers;
}
static uint8_t s_translateKey[256];
static Key::Enum translateKey(WPARAM _wparam)
{
return (Key::Enum)s_translateKey[_wparam&0xff];
}
struct MainThreadEntry
{
int m_argc;
char** m_argv;
static int32_t threadFunc(void* _userData);
};
struct Context
{
Context()
: m_frame(true)
, m_init(false)
, m_exit(false)
{
memset(s_translateKey, 0, sizeof(s_translateKey) );
s_translateKey[VK_ESCAPE] = Key::Esc;
s_translateKey[VK_RETURN] = Key::Return;
s_translateKey[VK_TAB] = Key::Tab;
s_translateKey[VK_BACK] = Key::Backspace;
s_translateKey[VK_SPACE] = Key::Space;
s_translateKey[VK_UP] = Key::Up;
s_translateKey[VK_DOWN] = Key::Down;
s_translateKey[VK_LEFT] = Key::Left;
s_translateKey[VK_RIGHT] = Key::Right;
s_translateKey[VK_PRIOR] = Key::PageUp;
s_translateKey[VK_NEXT] = Key::PageUp;
s_translateKey[VK_HOME] = Key::Home;
s_translateKey[VK_END] = Key::End;
s_translateKey[VK_SNAPSHOT] = Key::Print;
s_translateKey[VK_OEM_PLUS] = Key::Plus;
s_translateKey[VK_OEM_MINUS] = Key::Minus;
s_translateKey[VK_F1] = Key::F1;
s_translateKey[VK_F2] = Key::F2;
s_translateKey[VK_F3] = Key::F3;
s_translateKey[VK_F4] = Key::F4;
s_translateKey[VK_F5] = Key::F5;
s_translateKey[VK_F6] = Key::F6;
s_translateKey[VK_F7] = Key::F7;
s_translateKey[VK_F8] = Key::F8;
s_translateKey[VK_F9] = Key::F9;
s_translateKey[VK_F10] = Key::F10;
s_translateKey[VK_F11] = Key::F11;
s_translateKey[VK_F12] = Key::F12;
s_translateKey[VK_NUMPAD0] = Key::NumPad0;
s_translateKey[VK_NUMPAD1] = Key::NumPad1;
s_translateKey[VK_NUMPAD2] = Key::NumPad2;
s_translateKey[VK_NUMPAD3] = Key::NumPad3;
s_translateKey[VK_NUMPAD4] = Key::NumPad4;
s_translateKey[VK_NUMPAD5] = Key::NumPad5;
s_translateKey[VK_NUMPAD6] = Key::NumPad6;
s_translateKey[VK_NUMPAD7] = Key::NumPad7;
s_translateKey[VK_NUMPAD8] = Key::NumPad8;
s_translateKey[VK_NUMPAD9] = Key::NumPad9;
s_translateKey['0'] = Key::Key0;
s_translateKey['1'] = Key::Key1;
s_translateKey['2'] = Key::Key2;
s_translateKey['3'] = Key::Key3;
s_translateKey['4'] = Key::Key4;
s_translateKey['5'] = Key::Key5;
s_translateKey['6'] = Key::Key6;
s_translateKey['7'] = Key::Key7;
s_translateKey['8'] = Key::Key8;
s_translateKey['9'] = Key::Key9;
s_translateKey['A'] = Key::KeyA;
s_translateKey['B'] = Key::KeyB;
s_translateKey['C'] = Key::KeyC;
s_translateKey['D'] = Key::KeyD;
s_translateKey['E'] = Key::KeyE;
s_translateKey['F'] = Key::KeyF;
s_translateKey['G'] = Key::KeyG;
s_translateKey['H'] = Key::KeyH;
s_translateKey['I'] = Key::KeyI;
s_translateKey['J'] = Key::KeyJ;
s_translateKey['K'] = Key::KeyK;
s_translateKey['L'] = Key::KeyL;
s_translateKey['M'] = Key::KeyM;
s_translateKey['N'] = Key::KeyN;
s_translateKey['O'] = Key::KeyO;
s_translateKey['P'] = Key::KeyP;
s_translateKey['Q'] = Key::KeyQ;
s_translateKey['R'] = Key::KeyR;
s_translateKey['S'] = Key::KeyS;
s_translateKey['T'] = Key::KeyT;
s_translateKey['U'] = Key::KeyU;
s_translateKey['V'] = Key::KeyV;
s_translateKey['W'] = Key::KeyW;
s_translateKey['X'] = Key::KeyX;
s_translateKey['Y'] = Key::KeyY;
s_translateKey['Z'] = Key::KeyZ;
}
int32_t main(int _argc, char** _argv)
{
HINSTANCE instance = (HINSTANCE)GetModuleHandle(NULL);
WNDCLASSEX wnd;
memset(&wnd, 0, sizeof(wnd) );
wnd.cbSize = sizeof(wnd);
wnd.lpfnWndProc = DefWindowProc;
wnd.hInstance = instance;
wnd.hIcon = LoadIcon(instance, IDI_APPLICATION);
wnd.hCursor = LoadCursor(instance, IDC_ARROW);
wnd.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
wnd.lpszClassName = "bgfx_letterbox";
wnd.hIconSm = LoadIcon(instance, IDI_APPLICATION);
RegisterClassExA(&wnd);
memset(&wnd, 0, sizeof(wnd) );
wnd.cbSize = sizeof(wnd);
wnd.style = CS_HREDRAW | CS_VREDRAW;
wnd.lpfnWndProc = wndProc;
wnd.hInstance = instance;
wnd.hIcon = LoadIcon(instance, IDI_APPLICATION);
wnd.hCursor = LoadCursor(instance, IDC_ARROW);
wnd.lpszClassName = "bgfx";
wnd.hIconSm = LoadIcon(instance, IDI_APPLICATION);
RegisterClassExA(&wnd);
HWND hwnd = CreateWindowA("bgfx_letterbox"
, "BGFX"
, WS_POPUP|WS_SYSMENU
, -32000
, -32000
, 0
, 0
, NULL
, NULL
, instance
, 0
);
m_hwnd = CreateWindowA("bgfx"
, "BGFX"
, WS_OVERLAPPEDWINDOW|WS_VISIBLE
, 0
, 0
, DEFAULT_WIDTH
, DEFAULT_HEIGHT
, hwnd
, NULL
, instance
, 0
);
bgfx::winSetHwnd(m_hwnd);
adjust(DEFAULT_WIDTH, DEFAULT_HEIGHT, true);
m_width = DEFAULT_WIDTH;
m_height = DEFAULT_HEIGHT;
m_oldWidth = DEFAULT_WIDTH;
m_oldHeight = DEFAULT_HEIGHT;
MainThreadEntry mte;
mte.m_argc = _argc;
mte.m_argv = _argv;
bx::Thread thread;
thread.init(mte.threadFunc, &mte);
m_init = true;
m_eventQueue.postSizeEvent(m_width, m_height);
MSG msg;
msg.message = WM_NULL;
while (!m_exit)
{
WaitMessage();
while (0 != PeekMessage(&msg, NULL, 0U, 0U, PM_REMOVE) )
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
thread.shutdown();
DestroyWindow(m_hwnd);
DestroyWindow(hwnd);
return 0;
}
LRESULT process(HWND _hwnd, UINT _id, WPARAM _wparam, LPARAM _lparam)
{
if (m_init)
{
switch (_id)
{
case WM_USER_SET_WINDOW_SIZE:
{
uint32_t width = GET_X_LPARAM(_lparam);
uint32_t height = GET_Y_LPARAM(_lparam);
adjust(width, height, true);
}
break;
case WM_USER_TOGGLE_WINDOW_FRAME:
{
if (m_frame)
{
m_oldWidth = m_width;
m_oldHeight = m_height;
}
adjust(m_oldWidth, m_oldHeight, !m_frame);
}
break;
case WM_USER_MOUSE_LOCK:
setMouseLock(!!_lparam);
break;
case WM_DESTROY:
break;
case WM_QUIT:
case WM_CLOSE:
m_exit = true;
m_eventQueue.postExitEvent();
break;
case WM_SIZING:
{
RECT& rect = *(RECT*)_lparam;
uint32_t width = rect.right - rect.left - m_frameWidth;
uint32_t height = rect.bottom - rect.top - m_frameHeight;
//Recalculate size according to aspect ratio
switch (_wparam)
{
case WMSZ_LEFT:
case WMSZ_RIGHT:
{
float aspectRatio = 1.0f/m_aspectRatio;
width = bx::uint32_max(DEFAULT_WIDTH/4, width);
height = uint32_t(float(width)*aspectRatio);
}
break;
default:
{
float aspectRatio = m_aspectRatio;
height = bx::uint32_max(DEFAULT_HEIGHT/4, height);
width = uint32_t(float(height)*aspectRatio);
}
break;
}
//Recalculate position using different anchor points
switch(_wparam)
{
case WMSZ_LEFT:
case WMSZ_TOPLEFT:
case WMSZ_BOTTOMLEFT:
rect.left = rect.right - width - m_frameWidth;
rect.bottom = rect.top + height + m_frameHeight;
break;
default:
rect.right = rect.left + width + m_frameWidth;
rect.bottom = rect.top + height + m_frameHeight;
break;
}
m_eventQueue.postSizeEvent(m_width, m_height);
}
return 0;
case WM_SIZE:
{
uint32_t width = GET_X_LPARAM(_lparam);
uint32_t height = GET_Y_LPARAM(_lparam);
m_width = width;
m_height = height;
m_eventQueue.postSizeEvent(m_width, m_height);
}
break;
case WM_SYSCOMMAND:
switch (_wparam)
{
case SC_MINIMIZE:
case SC_RESTORE:
{
HWND parent = GetWindow(_hwnd, GW_OWNER);
if (NULL != parent)
{
PostMessage(parent, _id, _wparam, _lparam);
}
}
}
break;
case WM_MOUSEMOVE:
{
int32_t mx = GET_X_LPARAM(_lparam);
int32_t my = GET_Y_LPARAM(_lparam);
if (m_mouseLock)
{
mx -= m_mx;
my -= m_my;
if (0 == mx
&& 0 == my)
{
break;
}
setMousePos(m_mx, m_my);
}
m_eventQueue.postMouseEvent(mx, my);
}
break;
case WM_LBUTTONDOWN:
case WM_LBUTTONUP:
case WM_LBUTTONDBLCLK:
{
int32_t mx = GET_X_LPARAM(_lparam);
int32_t my = GET_Y_LPARAM(_lparam);
m_eventQueue.postMouseEvent(mx, my, MouseButton::Left, _id == WM_LBUTTONDOWN);
}
break;
case WM_MBUTTONDOWN:
case WM_MBUTTONUP:
case WM_MBUTTONDBLCLK:
{
int32_t mx = GET_X_LPARAM(_lparam);
int32_t my = GET_Y_LPARAM(_lparam);
m_eventQueue.postMouseEvent(mx, my, MouseButton::Middle, _id == WM_MBUTTONDOWN);
}
break;
case WM_RBUTTONUP:
case WM_RBUTTONDOWN:
case WM_RBUTTONDBLCLK:
{
int32_t mx = GET_X_LPARAM(_lparam);
int32_t my = GET_Y_LPARAM(_lparam);
m_eventQueue.postMouseEvent(mx, my, MouseButton::Right, _id == WM_RBUTTONDOWN);
}
break;
case WM_KEYDOWN:
case WM_SYSKEYDOWN:
case WM_KEYUP:
case WM_SYSKEYUP:
{
uint8_t modifiers = translateKeyModifiers();
Key::Enum key = translateKey(_wparam);
m_eventQueue.postKeyEvent(key, modifiers, _id == WM_KEYDOWN || _id == WM_SYSKEYDOWN);
}
break;
default:
break;
}
}
return DefWindowProc(_hwnd, _id, _wparam, _lparam);
}
void adjust(uint32_t _width, uint32_t _height, bool _windowFrame)
{
m_width = _width;
m_height = _height;
m_aspectRatio = float(_width)/float(_height);
ShowWindow(m_hwnd, SW_SHOWNORMAL);
RECT rect;
RECT newrect = {0, 0, (LONG)_width, (LONG)_height};
DWORD style = WS_POPUP|WS_SYSMENU;
if (m_frame)
{
GetWindowRect(m_hwnd, &m_rect);
m_style = GetWindowLong(m_hwnd, GWL_STYLE);
}
if (_windowFrame)
{
rect = m_rect;
style = m_style;
}
else
{
#if defined(__MINGW32__)
rect = m_rect;
style = m_style;
#else
HMONITOR monitor = MonitorFromWindow(m_hwnd, MONITOR_DEFAULTTONEAREST);
MONITORINFO mi;
mi.cbSize = sizeof(mi);
GetMonitorInfo(monitor, &mi);
newrect = mi.rcMonitor;
rect = mi.rcMonitor;
#endif // !defined(__MINGW__)
}
SetWindowLong(m_hwnd, GWL_STYLE, style);
uint32_t prewidth = newrect.right - newrect.left;
uint32_t preheight = newrect.bottom - newrect.top;
AdjustWindowRect(&newrect, style, FALSE);
m_frameWidth = (newrect.right - newrect.left) - prewidth;
m_frameHeight = (newrect.bottom - newrect.top) - preheight;
UpdateWindow(m_hwnd);
if (rect.left == -32000
|| rect.top == -32000)
{
rect.left = 0;
rect.top = 0;
}
int32_t left = rect.left;
int32_t top = rect.top;
int32_t width = (newrect.right-newrect.left);
int32_t height = (newrect.bottom-newrect.top);
if (!_windowFrame)
{
float aspectRatio = 1.0f/m_aspectRatio;
width = bx::uint32_max(DEFAULT_WIDTH/4, width);
height = uint32_t(float(width)*aspectRatio);
left = newrect.left+(newrect.right-newrect.left-width)/2;
top = newrect.top+(newrect.bottom-newrect.top-height)/2;
}
HWND parent = GetWindow(m_hwnd, GW_OWNER);
if (NULL != parent)
{
if (_windowFrame)
{
SetWindowPos(parent
, HWND_TOP
, -32000
, -32000
, 0
, 0
, SWP_SHOWWINDOW
);
}
else
{
SetWindowPos(parent
, HWND_TOP
, newrect.left
, newrect.top
, newrect.right-newrect.left
, newrect.bottom-newrect.top
, SWP_SHOWWINDOW
);
}
}
SetWindowPos(m_hwnd
, HWND_TOP
, left
, top
, width
, height
, SWP_SHOWWINDOW
);
ShowWindow(m_hwnd, SW_RESTORE);
m_frame = _windowFrame;
}
void setMousePos(int32_t _mx, int32_t _my)
{
POINT pt = { _mx, _my };
ClientToScreen(m_hwnd, &pt);
SetCursorPos(pt.x, pt.y);
}
void setMouseLock(bool _lock)
{
if (_lock != m_mouseLock)
{
if (_lock)
{
m_mx = m_width/2;
m_my = m_height/2;
ShowCursor(false);
setMousePos(m_mx, m_my);
}
else
{
setMousePos(m_mx, m_my);
ShowCursor(true);
}
m_mouseLock = _lock;
}
}
static LRESULT CALLBACK wndProc(HWND _hwnd, UINT _id, WPARAM _wparam, LPARAM _lparam);
EventQueue m_eventQueue;
HWND m_hwnd;
RECT m_rect;
DWORD m_style;
uint32_t m_width;
uint32_t m_height;
uint32_t m_oldWidth;
uint32_t m_oldHeight;
uint32_t m_frameWidth;
uint32_t m_frameHeight;
float m_aspectRatio;
int32_t m_mx;
int32_t m_my;
bool m_frame;
bool m_mouseLock;
bool m_init;
bool m_exit;
};
static Context s_ctx;
LRESULT CALLBACK Context::wndProc(HWND _hwnd, UINT _id, WPARAM _wparam, LPARAM _lparam)
{
return s_ctx.process(_hwnd, _id, _wparam, _lparam);
}
const Event* poll()
{
return s_ctx.m_eventQueue.poll();
}
void release(const Event* _event)
{
s_ctx.m_eventQueue.release(_event);
}
void setWindowSize(uint32_t _width, uint32_t _height)
{
PostMessage(s_ctx.m_hwnd, WM_USER_SET_WINDOW_SIZE, 0, (_height<<16) | (_width&0xffff) );
}
void toggleWindowFrame()
{
PostMessage(s_ctx.m_hwnd, WM_USER_TOGGLE_WINDOW_FRAME, 0, 0);
}
void setMouseLock(bool _lock)
{
PostMessage(s_ctx.m_hwnd, WM_USER_MOUSE_LOCK, 0, _lock);
}
int32_t MainThreadEntry::threadFunc(void* _userData)
{
MainThreadEntry* self = (MainThreadEntry*)_userData;
int32_t result = _main_(self->m_argc, self->m_argv);
PostMessage(s_ctx.m_hwnd, WM_QUIT, 0, 0);
return result;
}
} // namespace entry
int main(int _argc, char** _argv)
{
using namespace entry;
return s_ctx.main(_argc, _argv);
}
#endif // BX_PLATFORM_WINDOWS