Direct3D example

direct3d.cpp

#include <windows.h>
#include <windowsx.h>
#include <stdio.h>
#include <d3d9.h>

#pragma comment (lib, "d3d9.lib")

LPDIRECT3D9 d3d;
LPDIRECT3DDEVICE9 device;

const int W = 1200, H = 800;

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);

void Initialize(HWND hWnd)
{
	d3d = Direct3DCreate9(D3D_SDK_VERSION);

	D3DPRESENT_PARAMETERS d3dpp;

	ZeroMemory(&d3dpp, sizeof(d3dpp));
	d3dpp.Windowed = TRUE;
	d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
	d3dpp.hDeviceWindow = hWnd;
	d3dpp.BackBufferFormat = D3DFMT_A8R8G8B8;
	d3dpp.BackBufferWidth = W;
	d3dpp.BackBufferHeight = H;

	d3d->CreateDevice(D3DADAPTER_DEFAULT,
		D3DDEVTYPE_HAL,
		hWnd,
		D3DCREATE_SOFTWARE_VERTEXPROCESSING,
		&d3dpp,
		&device);

	printf("Hello world\n");
}

void Cleanup()
{
	device->Release();
	d3d->Release();
}

void Draw(void)
{
	IDirect3DSurface9 *surface = nullptr;
	device->CreateOffscreenPlainSurface(W, H, D3DFMT_A8R8G8B8, D3DPOOL_SYSTEMMEM, &surface, nullptr);

	IDirect3DSurface9 *buffer = nullptr;
	device->GetBackBuffer(0, 0, D3DBACKBUFFER_TYPE_MONO, &buffer);

	HDC targetdc = NULL;
	surface->GetDC(&targetdc);

	HWND srcwnd = GetConsoleWindow();
	HDC scrdc = GetDC(srcwnd);

	BOOL res = BitBlt(targetdc, 0, 0, W, H, scrdc, 0, 0, SRCCOPY);
	ReleaseDC(srcwnd, scrdc);
	surface->ReleaseDC(targetdc);

	device->UpdateSurface(surface, NULL, buffer, NULL);
	device->Present(NULL, NULL, NULL, NULL);
}

DWORD t=0;
int c=0;

int main()
{
	HWND hWnd;
	WNDCLASSEX wc;

	ZeroMemory(&wc, sizeof(WNDCLASSEX));

	wc.cbSize = sizeof(WNDCLASSEX);
	wc.style = CS_HREDRAW | CS_VREDRAW;
	wc.lpfnWndProc = WndProc;
	wc.hInstance = GetModuleHandle(NULL);
	wc.hCursor = LoadCursor(NULL, IDC_ARROW);
	wc.hbrBackground = (HBRUSH)COLOR_WINDOW;
	wc.lpszClassName = L"WindowClass";

	RegisterClassEx(&wc);

	hWnd = CreateWindowEx(NULL,
		L"WindowClass",
		L"Direct3D Test",
		WS_OVERLAPPEDWINDOW,
		CW_USEDEFAULT, 0,
		W, H,
		NULL,
		NULL,
		GetModuleHandle(NULL),
		NULL);

	ShowWindow(hWnd, SW_SHOW);

	Initialize(hWnd);

	MSG msg;

	while (TRUE)
	{
		while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
		{
			TranslateMessage(&msg);
			DispatchMessage(&msg);
		}

		if (msg.message == WM_QUIT)	break;

		DWORD t1 = GetTickCount();
		Draw();
		DWORD t2 = GetTickCount();
		t += t2 - t1;
		c++;
		if(c==50) printf("%f\n", t/(float)c);
	}
		
	Cleanup();

	return msg.wParam;
}

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	switch (message)
	{
	case WM_DESTROY:
	{
		PostQuitMessage(0);
		return 0;
	} break;
	}

	return DefWindowProc(hWnd, message, wParam, lParam);
}