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// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "gpu/demos/framework/window.h"
namespace {
LRESULT CALLBACK WindowProc(HWND hwnd, UINT msg,
WPARAM w_param, LPARAM l_param) {
LRESULT result = 0;
switch (msg) {
case WM_CLOSE:
::DestroyWindow(hwnd);
break;
case WM_DESTROY:
::PostQuitMessage(0);
break;
case WM_ERASEBKGND:
// Return a non-zero value to indicate that the background has been
// erased.
result = 1;
break;
case WM_PAINT: {
gpu::demos::Window* window = reinterpret_cast<gpu::demos::Window*>(
GetWindowLongPtr(hwnd, GWL_USERDATA));
if (window != NULL) window->OnPaint();
::ValidateRect(hwnd, NULL);
break;
}
default:
result = ::DefWindowProc(hwnd, msg, w_param, l_param);
break;
}
return result;
}
} // namespace.
namespace gpu {
namespace demos {
void Window::MainLoop() {
// Set this to the GWL_USERDATA so that it is available to WindowProc.
SetWindowLongPtr(window_handle_, GWL_USERDATA,
reinterpret_cast<LONG_PTR>(this));
MSG msg;
bool done = false;
while (!done) {
while (::PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
if (msg.message == WM_QUIT) done = true;
::TranslateMessage(&msg);
::DispatchMessage(&msg);
}
// Message queue is empty and application has not quit yet - keep painting.
if (!done) ::InvalidateRect(window_handle_, NULL, FALSE);
}
}
gfx::NativeWindow Window::CreateNativeWindow(const wchar_t* title,
int width, int height) {
WNDCLASS wnd_class = {0};
HINSTANCE instance = GetModuleHandle(NULL);
wnd_class.style = CS_OWNDC;
wnd_class.lpfnWndProc = WindowProc;
wnd_class.hInstance = instance;
wnd_class.hbrBackground =
reinterpret_cast<HBRUSH>(GetStockObject(BLACK_BRUSH));
wnd_class.lpszClassName = L"gpu_demo";
if (!RegisterClass(&wnd_class)) return NULL;
DWORD wnd_style = WS_OVERLAPPED | WS_SYSMENU;
RECT wnd_rect;
wnd_rect.left = 0;
wnd_rect.top = 0;
wnd_rect.right = width;
wnd_rect.bottom = height;
AdjustWindowRect(&wnd_rect, wnd_style, FALSE);
HWND hwnd = CreateWindow(
wnd_class.lpszClassName,
title,
wnd_style,
0,
0,
wnd_rect.right - wnd_rect.left,
wnd_rect.bottom - wnd_rect.top,
NULL,
NULL,
instance,
NULL);
if (hwnd == NULL) return NULL;
ShowWindow(hwnd, SW_SHOWNORMAL);
return hwnd;
}
gfx::PluginWindowHandle Window::PluginWindow(gfx::NativeWindow hwnd) {
return hwnd;
}
} // namespace demos
} // namespace gpu
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