本文整理汇总了C#中Gdk.Pixbuf.AddAlpha方法的典型用法代码示例。如果您正苦于以下问题：C# Pixbuf.AddAlpha方法的具体用法？C# Pixbuf.AddAlpha怎么用？C# Pixbuf.AddAlpha使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Gdk.Pixbuf的用法示例。
在下文中一共展示了Pixbuf.AddAlpha方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: RenderBubbles
private void RenderBubbles(Gdk.Window win, Gdk.Rectangle size,
out Pixbuf pbactive, out Pixbuf pbinactive,
out Gdk.Pixmap pbpm)
{
int pmHeight, pmWidth;
Gdk.Pixmap daPixmap;
Gdk.Pixmap daOtherPixmap;
pmHeight = size.Height - (wbsize * 2);
pmWidth = size.Width - (wbsize * 2);
Gdk.GC gc = new Gdk.GC(win);
Gdk.Pixmap pm = new Pixmap(win, size.Width, size.Height, -1);
gc.RgbFgColor = new Gdk.Color(255, 255, 255);
pm.DrawRectangle(gc, true, 0, 0, size.Width, size.Height);
gc.RgbFgColor = new Gdk.Color(249, 253, 202);
Gdk.Point[] roundedSquare = CalculateRect(wbsize, wbsize,
pmWidth, pmHeight);
pm.DrawPolygon(gc, true, roundedSquare);
Gdk.Point[] roundedborder = CalculateRect(wbsize, wbsize,
pmWidth - 1, pmHeight - 1);
gc.RgbFgColor = new Gdk.Color(0, 0, 0);
pm.DrawPolygon(gc, false, roundedborder);
Gdk.Point[] balloonptr = CalcPointerMoveWindow( size.Width,
size.Height );
gc.RgbFgColor = new Gdk.Color(249, 253, 202);
pm.DrawPolygon(gc, true, balloonptr);
gc.RgbFgColor = new Gdk.Color(0, 0, 0);
pm.DrawLine(gc, balloonptr[0].X, balloonptr[0].Y-1, balloonptr[1].X,
balloonptr[1].Y);
pm.DrawLine(gc, balloonptr[1].X, balloonptr[1].Y, balloonptr[2].X,
balloonptr[2].Y-1);
Gdk.Pixbuf pb = new Pixbuf(Gdk.Colorspace.Rgb, false,
8, size.Width, size.Height);
pb = Pixbuf.FromDrawable( pm, pm.Colormap, 0, 0, 0, 0,
size.Width, size.Height);
pb = pb.AddAlpha(true, 255, 255,255);
RenderPixmapAndMask(pb, out daPixmap, out daOtherPixmap, 2);
pbactive = pb;
pbpm = daOtherPixmap;
gc.RgbFgColor = new Gdk.Color(255, 255, 255);
pm.DrawRectangle(gc, true, 0, 0, size.Width, size.Height);
gc.RgbFgColor = new Gdk.Color(0, 0, 0);
pm.DrawPolygon(gc, false, roundedborder);
gc.RgbFgColor = new Gdk.Color(255, 255, 255);
pm.DrawPolygon(gc, true, balloonptr);
gc.RgbFgColor = new Gdk.Color(0, 0, 0);
pm.DrawLine(gc, balloonptr[0].X, balloonptr[0].Y-1, balloonptr[1].X,
balloonptr[1].Y);
pm.DrawLine(gc, balloonptr[1].X, balloonptr[1].Y, balloonptr[2].X,
balloonptr[2].Y - 1);
pb = Pixbuf.FromDrawable( pm,
pm.Colormap, 0, 0, 0, 0, size.Width, size.Height);
pbinactive = pb;
}示例2: UnsharpMask
public static unsafe Pixbuf UnsharpMask(Pixbuf src,
double radius,
double amount,
double threshold,
ThreadProgressDialog progressDialog)
{
// Make sure the pixbuf has an alpha channel before we try to blur it
src = src.AddAlpha (false, 0, 0, 0);
Pixbuf result = Blur (src, (int)radius, progressDialog);
int sourceRowstride = src.Rowstride;
int sourceHeight = src.Height;
int sourceChannels = src.NChannels;
int sourceWidth = src.Width;
int resultRowstride = result.Rowstride;
int resultWidth = result.Width;
int resultChannels = result.NChannels;
byte[] srcRow = new byte[sourceRowstride];
byte[] destRow = new byte[resultRowstride];
byte* sourcePixels = (byte*)src.Pixels;
byte* resultPixels = (byte*)result.Pixels;
for (int row=0; row < sourceHeight; row++) {
Pixbuf_GetRow (sourcePixels, row, sourceRowstride, sourceWidth, sourceChannels, srcRow);
Pixbuf_GetRow (resultPixels, row, resultRowstride, resultWidth, resultChannels, destRow);
int diff;
for (int i=0; i < sourceWidth*sourceChannels; i++) {
diff = srcRow [i] - destRow [i];
if (Math.Abs (2 * diff) < threshold)
diff = 0;
int val = (int)(srcRow [i] + amount * diff);
if (val > 255)
val = 255;
else if (val < 0)
val = 0;
destRow [i] = (byte)val;
}
Pixbuf_SetRow (resultPixels, destRow, row, resultRowstride, resultWidth, resultChannels);
// This is the other half of the progress so start and halfway
if (progressDialog != null)
progressDialog.Fraction = ((double)row / ((double) sourceHeight - 1) ) * 0.25 + 0.75;
}
return result;
}