GradientFill
This function is a replacement of the GradientFill function of Windows, that is bugged under windows 9x and ME.
void GradientFillRect(HDC hdc, LPRECT rcGradient, COLORREF firstColor, COLORREF secondColor, BOOL isVertical = FALSE)
{
BYTE startRed = GetRValue(firstColor);
BYTE startGreen = GetGValue(firstColor);
BYTE startBlue = GetBValue(firstColor);
BYTE endRed = GetRValue(secondColor);
BYTE endGreen = GetGValue(secondColor);
BYTE endBlue = GetBValue(secondColor);
HBRUSH endColor = CreateSolidBrush(secondColor);
FillRect(hdc, rcGradient, endColor);
DeleteObject(endColor);
int dy = 2;
int length = (isVertical ? rcGradient->bottom - rcGradient->top
: rcGradient->right - rcGradient->left) - dy;
for (int dn = 0; dn <= length; dn += dy)
{
BYTE currentRed = (BYTE)MulDiv(endRed-startRed, dn, length) + startRed;
BYTE currentGreen = (BYTE)MulDiv(endGreen-startGreen, dn, length) + startGreen;
BYTE currentBlue = (BYTE)MulDiv(endBlue-startBlue, dn, length) + startBlue;
RECT currentRect = {0};
if (isVertical)
{
currentRect.left = rcGradient->left;
currentRect.top = rcGradient->top + dn;
currentRect.right = currentRect.left + rcGradient->right - rcGradient->left;
currentRect.bottom = currentRect.top + dy;
}
else
{
currentRect.left = rcGradient->left + dn;
currentRect.top = rcGradient->top;
currentRect.right = currentRect.left + dy;
currentRect.bottom = currentRect.top + rcGradient->bottom - rcGradient->top;
}
HBRUSH currentColor = CreateSolidBrush( RGB(currentRed,currentGreen,currentBlue) );
FillRect(hdc, &currentRect, currentColor);
DeleteObject(currentColor);
}
}
Arguments
- hdc
- A handle to the device context the gradient must be drawn to
- rcGradient
- A pointer to a RECT structure that specify the rect of the device context where to draw the gradient
- firstColor
- The first color of the gradient. If it's a vertical gradient, this is the color at the top. If it's an horizontal gradient, this is the leftmost color.
- secondColor
- The second color of the gradient. If it's a vertical gradient, this is the color at the bottom. If it's an horizontal gradient, this is rightmost color.
- isVertical
- Use FALSE if you want a horizontal gradient (from left to right), or TRUE if you want a vertical gradient (from top to bottom). The default value is FALSE (horizontal gradient).
Comments
Anonimo wrote:
nice
(18.05.2009, 00:21)
Script by Alex
This page was last modified
34 months, 3 weeks, 2 days and 9 hours ago
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