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// Copyright (c) 2006-2009 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/app_framework/application.h"
#include "gpu/command_buffer/client/gles2_implementation.h"
#include "gpu/command_buffer/client/gles2_lib.h"
#include "gpu/command_buffer/service/command_buffer_service.h"
#include "gpu/command_buffer/service/gpu_processor.h"
using gpu::Buffer;
using gpu::CommandBufferService;
using gpu::GPUProcessor;
using gpu::gles2::GLES2CmdHelper;
using gpu::gles2::GLES2Implementation;
// TODO(alokp): Implement it on mac and linux when gpu process is functional
// on these OS'.
#if defined(OS_WIN)
namespace {
static const int32 kCommandBufferSize = 1024 * 1024;
static const int32 kTransferBufferSize = 512 * 1024;
static 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_PAINT: {
using gpu_demos::Application;
Application* app = reinterpret_cast<Application*>(
GetWindowLongPtr(hwnd, GWL_USERDATA));
if (app != NULL) app->OnPaint();
::ValidateRect(hwnd, NULL);
break;
}
default:
result = ::DefWindowProc(hwnd, msg, w_param, l_param);
break;
}
return result;
}
} // namespace.
namespace gpu_demos {
Application::Application()
: width_(512),
height_(512),
window_handle_(NULL) {
}
Application::~Application() {
}
void Application::MainLoop() {
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) SendMessage(window_handle_, WM_PAINT, 0, 0);
}
}
void Application::OnPaint() {
Draw();
gles2::GetGLContext()->SwapBuffers();
}
bool Application::InitRenderContext() {
window_handle_ = CreateNativeWindow();
if (window_handle_ == NULL) {
return false;
}
scoped_ptr<CommandBufferService> command_buffer(new CommandBufferService);
if (!command_buffer->Initialize(kCommandBufferSize)) {
return false;
}
scoped_refptr<GPUProcessor> gpu_processor(
new GPUProcessor(command_buffer.get()));
if (!gpu_processor->Initialize(window_handle_)) {
return false;
}
command_buffer->SetPutOffsetChangeCallback(
NewCallback(gpu_processor.get(), &GPUProcessor::ProcessCommands));
GLES2CmdHelper* helper = new GLES2CmdHelper(command_buffer.get());
if (!helper->Initialize()) {
// TODO(alokp): cleanup.
return false;
}
int32 transfer_buffer_id =
command_buffer->CreateTransferBuffer(kTransferBufferSize);
Buffer transfer_buffer =
command_buffer->GetTransferBuffer(transfer_buffer_id);
if (transfer_buffer.ptr == NULL) return false;
gles2::g_gl_impl = new GLES2Implementation(helper,
transfer_buffer.size,
transfer_buffer.ptr,
transfer_buffer_id);
return command_buffer.release() != NULL;
}
NativeWindowHandle Application::CreateNativeWindow() {
WNDCLASS wnd_class = {0};
HINSTANCE instance = GetModuleHandle(NULL);
wnd_class.style = CS_OWNDC;
wnd_class.lpfnWndProc = (WNDPROC)WindowProc;
wnd_class.hInstance = instance;
wnd_class.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
wnd_class.lpszClassName = L"opengles2.0";
if (!RegisterClass(&wnd_class)) return NULL;
DWORD wnd_style = WS_VISIBLE | WS_POPUP | WS_BORDER | WS_SYSMENU | WS_CAPTION;
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,
wnd_class.lpszClassName,
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);
// Set this to the GWL_USERDATA so that it is available to WindowProc.
SetWindowLongPtr(hwnd, GWL_USERDATA, (LONG_PTR)this);
return hwnd;
}
} // namespace gpu_demos
#endif // defined(OS_WIN)
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