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// win-window.cpp
#define _CRT_SECURE_NO_WARNINGS 1
#include <slang.h>
#include <slang-com-helper.h>
#include "../window.h"
#define WIN32_LEAN_AND_MEAN
#define NOMINMAX
#include <Windows.h>
#undef WIN32_LEAN_AND_MEAN
#undef NOMINMAX
#ifdef _MSC_VER
#pragma warning(disable: 4996)
#endif
#include <stdio.h>
namespace renderer_test {
class WinWindow : public Window
{
public:
virtual SlangResult initialize(int width, int height) SLANG_OVERRIDE;
virtual void show() SLANG_OVERRIDE;
virtual void* getHandle() const SLANG_OVERRIDE { return m_hwnd; }
virtual SlangResult runLoop(WindowListener* listener) SLANG_OVERRIDE;
virtual ~WinWindow();
static LRESULT CALLBACK windowProc(HWND windowHandle, UINT message, WPARAM wParam, LPARAM lParam);
protected:
HINSTANCE m_hinst = nullptr;
HWND m_hwnd = nullptr;
};
//
// We use a bare-minimum window procedure to get things up and running.
//
/* static */LRESULT CALLBACK WinWindow::windowProc(HWND windowHandle, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message)
{
case WM_CLOSE:
PostQuitMessage(0);
return 0;
}
return DefWindowProcW(windowHandle, message, wParam, lParam);
}
static ATOM _getWindowClassAtom(HINSTANCE hinst)
{
static ATOM s_windowClassAtom;
if (s_windowClassAtom)
{
return s_windowClassAtom;
}
WNDCLASSEXW windowClassDesc;
windowClassDesc.cbSize = sizeof(windowClassDesc);
windowClassDesc.style = CS_OWNDC | CS_HREDRAW | CS_VREDRAW;
windowClassDesc.lpfnWndProc = &WinWindow::windowProc;
windowClassDesc.cbClsExtra = 0;
windowClassDesc.cbWndExtra = 0;
windowClassDesc.hInstance = hinst;
windowClassDesc.hIcon = 0;
windowClassDesc.hCursor = 0;
windowClassDesc.hbrBackground = 0;
windowClassDesc.lpszMenuName = 0;
windowClassDesc.lpszClassName = L"SlangRenderTest";
windowClassDesc.hIconSm = 0;
s_windowClassAtom = RegisterClassExW(&windowClassDesc);
return s_windowClassAtom;
}
SlangResult WinWindow::initialize(int widthIn, int heightIn)
{
// Do initial window-creation stuff here, rather than in the renderer-specific files
m_hinst = GetModuleHandleA(0);
// First we register a window class.
ATOM windowClassAtom = _getWindowClassAtom(m_hinst);
if (!windowClassAtom)
{
fprintf(stderr, "error: failed to register window class\n");
return SLANG_FAIL;
}
// Next, we create a window using that window class.
// We will create a borderless window since our screen-capture logic in GL
// seems to get thrown off by having to deal with a window frame.
DWORD windowStyle = WS_POPUP;
DWORD windowExtendedStyle = 0;
RECT windowRect = { 0, 0, widthIn, heightIn };
AdjustWindowRectEx(&windowRect, windowStyle, /*hasMenu=*/false, windowExtendedStyle);
{
auto width = windowRect.right - windowRect.left;
auto height = windowRect.bottom - windowRect.top;
LPWSTR windowName = L"Slang Render Test";
m_hwnd = CreateWindowExW(
windowExtendedStyle,
(LPWSTR)windowClassAtom,
windowName,
windowStyle,
0, 0, // x, y
width, height,
NULL, // parent
NULL, // menu
m_hinst,
NULL);
}
if (!m_hwnd)
{
fprintf(stderr, "error: failed to create window\n");
return SLANG_FAIL;
}
return SLANG_OK;
}
void WinWindow::show()
{
// Once initialization is all complete, we show the window...
int showCommand = SW_SHOW;
ShowWindow(m_hwnd, showCommand);
}
SlangResult WinWindow::runLoop(WindowListener* listener)
{
// ... and enter the event loop:
while (!m_isQuitting)
{
MSG message;
int result = PeekMessageW(&message, NULL, 0, 0, PM_REMOVE);
if (result != 0)
{
if (message.message == WM_QUIT)
{
m_quitValue = (int)message.wParam;
return SLANG_OK;
}
TranslateMessage(&message);
DispatchMessageW(&message);
}
else
{
if (listener)
{
SLANG_RETURN_ON_FAIL(listener->update(this));
}
}
}
return SLANG_OK;
}
WinWindow::~WinWindow()
{
if (m_hwnd)
{
DestroyWindow(m_hwnd);
}
}
Window* createWinWindow()
{
return new WinWindow;
}
} // namespace renderer_test
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