HGE修改引擎适用于MFC的子窗口的修改

来源：互联网发布：郭德纲知乎编辑：程序博客网时间：2024/05/07 18:02

打开hge181/src/core/system.cpp

找到System_Initiate()函数，可以看见里面有段代码是用于创建窗口。

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// Register window class
winclass.style = CS_DBLCLKS | CS_OWNDC | CS_HREDRAW | CS_VREDRAW;
winclass.lpfnWndProc = WindowProc;
winclass.cbClsExtra = 0;
winclass.cbWndExtra = 0;
winclass.hInstance = hInstance;
winclass.hCursor = LoadCursor(NULL, IDC_ARROW);
winclass.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
winclass.lpszMenuName = NULL;
winclass.lpszClassName = WINDOW_CLASS_NAME;
if(szIcon) winclass.hIcon = LoadIcon(hInstance, szIcon);
else winclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
if (!RegisterClass(&winclass)) {
_PostError("Can't register window class");
return false;
}
// Create window
width=nScreenWidth + GetSystemMetrics(SM_CXFIXEDFRAME)*2;
height=nScreenHeight + GetSystemMetrics(SM_CYFIXEDFRAME)*2 + GetSystemMetrics(SM_CYCAPTION);
rectW.left=(GetSystemMetrics(SM_CXSCREEN)-width)/2;
rectW.top=(GetSystemMetrics(SM_CYSCREEN)-height)/2;
rectW.right=rectW.left+width;
rectW.bottom=rectW.top+height;
styleW=WS_POPUP|WS_CAPTION|WS_SYSMENU|WS_MINIMIZEBOX|WS_VISIBLE; //WS_OVERLAPPED | WS_SYSMENU | WS_MINIMIZEBOX;
rectFS.left=0;
rectFS.top=0;
rectFS.right=nScreenWidth;
rectFS.bottom=nScreenHeight;
styleFS=WS_POPUP|WS_VISIBLE; //WS_POPUP
if(hwndParent)
{
rectW.left=0;
rectW.top=0;
rectW.right=nScreenWidth;
rectW.bottom=nScreenHeight;
styleW=WS_CHILD|WS_VISIBLE;
bWindowed=true;
}
if(bWindowed)
hwnd = CreateWindowEx(0, WINDOW_CLASS_NAME, szWinTitle, styleW,
rectW.left, rectW.top, rectW.right-rectW.left, rectW.bottom-rectW.top,
hwndParent, NULL, hInstance, NULL);
else
hwnd = CreateWindowEx(WS_EX_TOPMOST, WINDOW_CLASS_NAME, szWinTitle, styleFS,
0, 0, 0, 0,
NULL, NULL, hInstance, NULL);
if (!hwnd)
{
_PostError("Can't create window");
return false;
}
ShowWindow(hwnd, SW_SHOW);shi

这段代码是创建窗口。

但因为我们是创建基于MFC窗口消息的图形，其窗口创建MFC已经帮其做好了。所以需要将其删除。

再找到SystemSetStatusHwnd函数，修改代码：

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void CALL HGE_Impl::System_SetStateHwnd(hgeHwndState state, HWND value)
{
switch(state)
{
case HGE_HWND: if(!hwnd) hwnd = value; break;
case HGE_HWNDPARENT: if(!hwnd) hwndParent=value; break;
}
}

这样做是方便我们设置渲染的窗口。比如对话框之类的。

接下来在HGE_IMP.H文件中定义成员

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RECT flipSrcRect;
RECT flipDstRect;

并将其初始化为0.

打开hge181/src/core/graphics.cpp文件修改Gfx_EndScene函数修改代码如下：

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void CALL HGE_Impl::Gfx_EndScene(bool use_fliRect /*= 0*/)
{
_render_batch(true);
pD3DDevice->EndScene();
if(!pCurTarget)
{
if (!use_fliRect)
{
pD3DDevice->Present( NULL, NULL, NULL, NULL );
return;
}
pD3DDevice->Present(&flipSrcRect, &flipDstRect, NULL,NULL);
}
}

修改_GfxInit()在 pD3D=Direct3DCreate8(120); // D3D_SDK_VERSION这句代码前面添加如下代码：

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if( bWindowed )
{
int width=nScreenWidth + GetSystemMetrics(SM_CXFIXEDFRAME)*2;
int height=nScreenHeight + GetSystemMetrics(SM_CYFIXEDFRAME)*2 + GetSystemMetrics(SM_CYCAPTION);
rectW.left=(GetSystemMetrics(SM_CXSCREEN)-width)/2;
rectW.top=(GetSystemMetrics(SM_CYSCREEN)-height)/2;
rectW.right=rectW.left+width;
rectW.bottom=rectW.top+height;
if(!hwnd)
{
_PostError("hwnd is NULL");
return false;
}
styleW=GetWindowLong(hwnd,GWL_STYLE);
}
else
{
rectFS.left=0;
rectFS.top=0;
rectFS.right=nScreenWidth;
rectFS.bottom=nScreenHeight;
styleFS = WS_POPUP|WS_VISIBLE;
}

rectW和rectFS顾名思义分别设置渲染子窗口区域，渲染整个屏幕区域。

并添加一个接口

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void CALL HGE_Impl::Gfx_SetFlipRect(int top, int left, int right, int bottom)
{
flipSrcRect.top = top;
flipSrcRect.left = left;
flipSrcRect.right =right;
flipSrcRect.bottom = bottom;
flipDstRect.top = top;
flipDstRect.left = left;
flipDstRect.right =right;
flipDstRect.bottom = bottom;
}

这几句代码的作用是为了兼容MFC绘制模式。我们在这里的pD3DDevice->Present(&flipSrcRect, &flipDstRect, NULL,NULL);函数的作用是为了绘制到指定的我们的渲染区域。

调用过程如下。创建对话框,在初始化对话框上面初始化Render

具体代码如下：

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CRect rect;
HWND hwnd = GetDlgItem(IDC_STATIC_RENDER)->GetSafeHwnd();
GetDlgItem(IDC_STATIC_RENDER)->GetClientRect(&rect);
hge = hgeCreate(HGE_VERSION);
hge->System_SetState(HGE_SCREENWIDTH, rect.Width());
hge->System_SetState(HGE_SCREENHEIGHT, rect.Height());
hge->System_SetState(HGE_WINDOWED, true);
//hge->System_SetState(HGE_HWNDPARENT, GetSafeHwnd());
hge->System_SetState(HGE_HWND,hwnd);
hge->System_SetState(HGE_FRAMEFUNC, FrameFunc);
hge->System_SetState(HGE_FPS,60);
hge->System_SetState(HGE_DONTSUSPEND, true);
hge->System_SetState(HGE_TEXTUREFILTER, false);
hge->System_SetState(HGE_SCREENBPP, 32);
hge->System_SetState(HGE_LOGFILE, "log.txt");
hge->System_Initiate();
hge->Gfx_SetFlipRect(25, 25, rect.Width()-50, rect.Height()-50);
m_htexture = hge->Texture_Load("minimap.dds");
m_pic = new hgeSprite(hge, m_htexture);//这里的接口稍稍做一点变动，涉及到后面四个参数的操作可以屏蔽掉
//因为这步就可以重新设置图片大小
m_pic->SetTextureRect( 0, 0, hge->Texture_GetWidth(m_htexture), hge->Texture_GetHeight(m_htexture) );

后面创建图片并具体渲染，我们可以模仿hgeSprite这种方式创建。然后在OnTimer里面进行渲染。

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void CDxTestDlg::OnPaint()
{
/// render to target
m_render->Gfx_Clear(0);
m_render->Gfx_BeginScene();
m_pic->RenderEx(100, 100, 0.0f, 0.5, 0.5);
m_render->Gfx_EndScene(true);
}