Creating transparent parent window without using LWA_COLORKEY or effecting child windows

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英文:

c++ | Creating transparent parent window without using LWA_COLORKEY or effecting child windows

问题

我正在尝试让我的父窗口变成透明，但不影响我的子窗口的透明度。
我尝试使用LWA_ALPHA，但这也改变了子窗口的透明度，这不是我想要的。
LWA_COLORKEY 有效，但我意识到你不能拥有半透明的效果，而且会降低你的帧速率，所以我不想使用这个，因为它不适用于我想要实现的效果。

我还尝试了dwextendmargin，但似乎没有任何作用。

任何帮助都将不胜感激。
这是我的窗口和窗口类的代码：

  1. //注册窗口类
  2. WNDCLASSEX wc = {
  3. 	sizeof(WNDCLASSEX),
  4. 	CS_CLASSDC | CS_HREDRAW | CS_VREDRAW,
  5. 	WndProc,
  6. 	0L,
  7. 	0L,
  8. 	hInst,
  9. 	NULL,
  10. 	NULL, NULL,
  11. 	NULL,
  12. 	_T("    "),
  13. 	NULL
  14. };
  16. RegisterClassExA(&wc);
  18. //创建窗口
  20. wnd = CreateWindowExA( //父窗口
  21. 	WS_EX_TOPMOST,
  22. 	wc.lpszClassName,
  23. 	"",
  24. 	WS_POPUP | WS_VISIBLE | WS_EX_TRANSPARENT | WS_CLIPCHILDREN,
  25. 	0, 0, //位置
  26. 	sInfo->Width, sInfo->Height, //大小
  27. 	NULL,
  28. 	NULL,
  29. 	hInst,
  30. 	NULL);
  32. child = CreateWindowA(
  33. 	wc.lpszClassName, 
  34. 	"",
  35. 	WS_CHILD | WS_VISIBLE, 
  36. 	0, 0, 
  37. 	sInfo->Width, sInfo->Height, 
  38. 	wnd, 
  39. 	NULL, 
  40. 	hInst, 
  41. 	NULL);
英文:

I am trying to have my parent window transparent and my child window not effected by this transparency.
I did use LWA_alpha but that changed the transparency of the child window aswell which I do not want.
LWA_colorkey was working but I realised you cannot have something semi transparent, and it also halfs your fps so i dont want to use this as it doesnt work for what I want to make.

I have also used the dwextendmargin thing but this didnt seem to do anything.

Any help would be appriciated.
Here is the code for my windows and window's class

  1. //Register Window Class
  2. 	WNDCLASSEX wc = {
  3. 	sizeof(WNDCLASSEX),
  4. 	CS_CLASSDC | CS_HREDRAW | CS_VREDRAW,
  5. 	WndProc,
  6. 	0L,
  7. 	0L,
  8. 	hInst,
  9. 	NULL,
  10. 	NULL, NULL,
  11. 	NULL,
  12. 	_T("    "),
  13. 	NULL
  14. 	};
  16. 	RegisterClassExA(&wc);
  18. 	//Create Window
  20. 	wnd = CreateWindowExA( //parent window
  21. 		WS_EX_TOPMOST,
  22. 		wc.lpszClassName,
  23. 		"",
  24. 		WS_POPUP | WS_VISIBLE | WS_EX_TRANSPARENT | WS_CLIPCHILDREN,
  25. 		0, 0, //Pos
  26. 		sInfo->Width, sInfo->Height, //Size
  27. 		NULL,
  28. 		NULL,
  29. 		hInst,
  30. 		NULL);
  32. child = CreateWindowA(
  33. 		wc.lpszClassName, 
  34. 		"",
  35. 		WS_CHILD | WS_VISIBLE, 
  36. 		0, 0, 
  37. 		sInfo->Width, sInfo->Height, 
  38. 		wnd, 
  39. 		NULL, 
  40. 		hInst, 
  41. 		NULL);

答案1

得分: 0

我最终决定切换到OpenGL，因为这样做会容易得多。

英文:

I ended up just switching to opengl as it was alot easier to do this task.

答案2

得分: -2

使用以下代码：
SetLayeredWindowAttributes(hwnd, RGB(255,0,0), 0, LWA_COLORKEY);

英文:

Use this
SetLayeredWindowAttributes(hwnd, RGB(255,0,0), 0, LWA_COLORKEY);

huangapple
  • 本文由 发表于 2023年2月27日 01:55:57
  • 转载请务必保留本文链接：https://go.coder-hub.com/75573962.html
  • alpha
  • c++
  • transparent
  • winapi
  • window
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