屏幕截图: http://i.imgur.com/hbExq9N.jpg
您好,我正在尝试在静态控件上设置带有Alpha通道的png图片,但透明像素总是填充白色或黑色。
无论图像是否位于静态控件顶部或只是绘制在主窗口上都不重要。
如果您有一些想法,请给予反馈。
谢谢
抱歉,我应该在之前发布代码。
//First try loading icon with transparency to static control or button:
//static control;
HWND hL;
HICON iStick;
case WM_CREATE:
iStick = (HICON)LoadImage(hInst, MAKEINTRESOURCE(IDI_ICON1), IMAGE_ICON, 0, 0, LR_LOADTRANSPARENT);
hL = CreateWindow(L"STATIC", NULL, WS_CHILD | WS_VISIBLE | SS_BITMAP/*SS_ICON*/, 193, 290, 32, 32, hwnd, NULL, hInst, NULL);
SendMessage(hL, STM_SETIMAGE, IMAGE_ICON, (LPARAM)iStick);
//SendMessage(hL, STM_SETICON, IMAGE_ICON, (LPARAM)iStick);
//Second try to draw on background 32bit bmp A8R8G8B8 :
PAINTSTRUCT ps;
HDC hdc;
RECT r;
static HDC membit;
static BITMAP bm;
case WM_CREATE:
SetWindowLong(hWnd, GWL_EXSTYLE, WS_EX_TOPMOST | WS_EX_LAYERED);
SetWindowPos(hWnd, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOMOVE |SWP_NOSIZE);
SetLayeredWindowAttributes(hWnd, 0, (255 * 100) / 100, LWA_ALPHA);
hStick = LoadBitmap(hInst, MAKEINTRESOURCE(IDB_BITMAP15));
GetObject(hStick, sizeof(bm), &bm);
membit = CreateCompatibleDC(hdc);
SelectObject(membit, hStick);
ReleaseDC(hWnd, hdc);
case WM_CTLCOLOREDIT:
SetTextColor((HDC)wParam, RGB(65, 65, 65)); //
return 0;
//MakeStaticbackground transparent
case WM_CTLCOLORSTATIC:
SetBkMode((HDC)wParam, TRANSPARENT); //
SetTextColor((HDC)wParam, RGB(38, 205, 247)); //
return (BOOL)GetStockObject(NULL_BRUSH);
case WM_PAINT:
hdc = BeginPaint(hWnd, &ps);
GetClientRect(hWnd, &r);
FillRect(hdc, &r, hBrush);
SetBkMode(hdc, TRANSPARENT);
BLENDFUNCTION BlendFunction;
BlendFunction.AlphaFormat = AC_SRC_ALPHA;
BlendFunction.BlendFlags = 0;
BlendFunction.BlendOp = AC_SRC_OVER;
BlendFunction.SourceConstantAlpha = 255;
//BitBlt(hdc, 500, 280, bm.bmWidth, bm.bmHeight, membit, 0, 0, SRCCOPY);
AlphaBlend(hdc, 500, 280, bm.bmWidth, bm.bmHeight, membit, 0, 0, 32, 32, BlendFunction);
//TransparentBlt(hdc, 500, 300, 32, 32, membit, 32, 32, 32, 32, RGB(255, 255, 255));
EndPaint(hWnd, &ps);
break;
case WM_ERASEBKGND:
return (LRESULT)1;
还有其他我记不起来的问题,但背景像素总是填充白色或黑色。
HDC hDC = ::GetDC(hwnd);
DrawIconEx(hDC, 193 + (js.lX / 22), 290 + (js.lY / 22), iStick, 32, 32, 0, NULL, DI_NORMAL); DrawIconEx(hDC, 340 + (js.lZ / 22), 290 + (js.lRz / 22), iStick, 32, 32, 0, NULL, DI_NORMAL); //DestroyIcon(iStick); ReleaseDC(hwnd, hDC); - Borys ShobatWS_EX_LAYERED
和SetLayeredWindowAttributes
。用普通位图绘制背景图像。只用图标绘制那些移动的黑色精灵。还要添加WS_CLIPCHILDREN
。如果仍然有闪烁,可以尝试使用ExcludeClipRect在绘画中手动排除控件区域。 - Barmak Shemirani