使用透明度/不透明度绘制文本 [英] Draw Text with Transparency / Opacity

问题描述

嘿朋友



如何使用透明度/不透明度的CDC绘制文字？



像水印 [ ^ ]在MFC中？



在Windows上可以选择使用类似

 typedef DWORD（WINAPI * PSLWA）制作Windows Alpha Blend / Transparent（HWND， DWORD，BYTE，DWORD）; 
 
静态PSLWA pSetLayeredWindowAttributes = NULL; 
 static BOOL initialized = FALSE; 
 
 
 BOOL MakeWindowTransparent（HWND hWnd，unsigned char factor）
 {
 / *首先，看看我们是否可以获得我们需要的API调用。如果我们尝试过
 *一次，我们不需要再试一次。 * / 
 if（！initialized）
 {
 HMODULE hDLL = LoadLibrary（user32）; 
 
 pSetLayeredWindowAttributes = 
（PSLWA）GetProcAddress（hDLL，SetLayeredWindowAttributes）; 
 
 initialized = TRUE; 
} 
 
 / * ...省略...... * / 
} 

有没有相关的文字方式？





问候

解决方案

< blockquote>也许这会对你有帮助



C ++ GDI +透明分层窗口上的绘图文字

http://stackoverflow.com/questions/4783781/c-gdi-drawing-text-on-a-透明分层窗口 [ ^ ]

Hey Friends

Any idea of how i can draw a text using CDC with Transparency / Opacity ?

Something like Watermarking[^] in MFC ?

On Windows there is option of making Windows Alpha Blend / Transparent using something like

typedef DWORD (WINAPI *PSLWA)(HWND, DWORD, BYTE, DWORD);

static PSLWA pSetLayeredWindowAttributes = NULL;
static BOOL initialized = FALSE;


BOOL MakeWindowTransparent(HWND hWnd, unsigned char factor)
{
   /* First, see if we can get the API call we need. If we''ve tried
    * once, we don''t need to try again. */
   if (!initialized)
   {
      HMODULE hDLL = LoadLibrary ("user32");

      pSetLayeredWindowAttributes = 
         (PSLWA) GetProcAddress(hDLL, "SetLayeredWindowAttributes");

      initialized = TRUE;
   }

   /* ... elided ... */
}

Is there any related way for Text ?


Regards

解决方案

Perhaps this will help you

C++ GDI+ drawing text on a transparent layered window
http://stackoverflow.com/questions/4783781/c-gdi-drawing-text-on-a-transparent-layered-window[^]

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