CODEWITHSUNDEEP
c++winapinative
jmasterx
jmasterx

Reputation: 54113

Gradient Brush in Native C++?

In c#, you can use drawing2d.lineargradientbrush, but in c++ right now I only found the CreateSolidBrush function. Is there a function in the native gdi dll to create a gradient brush? I couldn't find anything like this at msdn. Thanks

Upvotes: 4

Views: 4590

Answers (3)

Brian R. Bondy
Brian R. Bondy

Reputation: 347226

You would have to use a combination of the Win32 API GradientFill, CreateCompatibleBitmap, and CreatePatternBrush.

Upvotes: 2

Alan
Alan

Reputation: 13721

To draw a vertical gradient:

void VerticalGradient(HDC hDC, const RECT& GradientFill, 
                      COLORREF rgbTop, COLORREF rgbBottom)
{
    GRADIENT_RECT gradientRect = { 0, 1 };
    TRIVERTEX triVertext[ 2 ] = {
        GradientFill.left - 1,
        GradientFill.top - 1,
        GetRValue(rgbTop) << 8,
        GetGValue(rgbTop) << 8,
        GetBValue(rgbTop) << 8,
        0x0000,         
        GradientFill.right,
        GradientFill.bottom,
        GetRValue(rgbBottom) << 8,
        GetGValue(rgbBottom) << 8,
        GetBValue(rgbBottom) << 8,
        0x0000
    };
    GradientFill(hDC, triVertext, 2, &gradientRect, 1, GRADIENT_FILL_RECT_V);
}

Upvotes: 6

Cristian Adam
Cristian Adam

Reputation: 4834

C# uses GDI+ for Drawing2d. You can use GDI+ in C++ also - MSDN Creating a Linear Gradient

Upvotes: 2

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