本文整理汇总了C#中Cairo.Context.Clip方法的典型用法代码示例。如果您正苦于以下问题：C# Context.Clip方法的具体用法？C# Context.Clip怎么用？C# Context.Clip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Cairo.Context的用法示例。
在下文中一共展示了Context.Clip方法的15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: DrawBackground
protected override void DrawBackground (Context context, Gdk.Rectangle region)
{
LayoutRoundedRectangle (context, region);
context.Clip ();
context.SetSourceColor (CairoExtensions.ParseColor ("D3E6FF"));
context.Paint ();
context.Save ();
context.Translate (region.X + region.Width / 2.0, region.Y + region.Height);
using (var rg = new RadialGradient (0, 0, 0, 0, 0, region.Height * 1.2)) {
var color = CairoExtensions.ParseColor ("E5F0FF");
rg.AddColorStop (0, color);
color.A = 0;
rg.AddColorStop (1, color);
context.Scale (region.Width / (double)region.Height, 1.0);
context.SetSource (rg);
context.Paint ();
}
context.Restore ();
LayoutRoundedRectangle (context, region, -3, -3, 2);
context.SetSourceRGBA (1, 1, 1, 0.4);
context.LineWidth = 1;
context.StrokePreserve ();
context.Clip ();
int boxSize = 11;
int x = region.Left + (region.Width % boxSize) / 2;
for (; x < region.Right; x += boxSize) {
context.MoveTo (x + 0.5, region.Top);
context.LineTo (x + 0.5, region.Bottom);
}
int y = region.Top + (region.Height % boxSize) / 2;
y += boxSize / 2;
for (; y < region.Bottom; y += boxSize) {
context.MoveTo (region.Left, y + 0.5);
context.LineTo (region.Right, y + 0.5);
}
context.SetSourceRGBA (1, 1, 1, 0.2);
context.Stroke ();
context.ResetClip ();
}示例2: CreateImageBrush
public static SurfacePattern CreateImageBrush(ImageBrush brush, Size targetSize)
{
if (brush.Source == null)
{
return null;
}
// TODO: This is directly ported from Direct2D and could probably be made more
// efficient on cairo by taking advantage of the fact that cairo has Extend.None.
var image = ((BitmapImpl)brush.Source.PlatformImpl).Surface;
var imageSize = new Size(brush.Source.PixelWidth, brush.Source.PixelHeight);
var tileMode = brush.TileMode;
var sourceRect = brush.SourceRect.ToPixels(imageSize);
var destinationRect = brush.DestinationRect.ToPixels(targetSize);
var scale = brush.Stretch.CalculateScaling(destinationRect.Size, sourceRect.Size);
var translate = CalculateTranslate(brush, sourceRect, destinationRect, scale);
var intermediateSize = CalculateIntermediateSize(tileMode, targetSize, destinationRect.Size);
var intermediate = new ImageSurface (Format.ARGB32, (int)intermediateSize.Width, (int)intermediateSize.Height);
using (var context = new Context(intermediate))
{
Rect drawRect;
var transform = CalculateIntermediateTransform(
tileMode,
sourceRect,
destinationRect,
scale,
translate,
out drawRect);
context.Rectangle(drawRect.ToCairo());
context.Clip();
context.Transform(transform.ToCairo());
Gdk.CairoHelper.SetSourcePixbuf(context, image, 0, 0);
context.Rectangle(0, 0, imageSize.Width, imageSize.Height);
context.Fill();
var result = new SurfacePattern(intermediate);
if ((brush.TileMode & TileMode.FlipXY) != 0)
{
// TODO: Currently always FlipXY as that's all cairo supports natively.
// Support separate FlipX and FlipY by drawing flipped images to intermediate
// surface.
result.Extend = Extend.Reflect;
}
else
{
result.Extend = Extend.Repeat;
}
if (brush.TileMode != TileMode.None)
{
var matrix = result.Matrix;
matrix.InitTranslate(-destinationRect.X, -destinationRect.Y);
result.Matrix = matrix;
}
return result;
}
}示例3: clip
public void clip(Context ctx)
{
foreach (Rectangle r in list)
ctx.Rectangle(r);
ctx.Clip();
}示例4: OnFillRegionComputed
protected unsafe override void OnFillRegionComputed(Point[][] polygonSet)
{
SimpleHistoryItem hist = new SimpleHistoryItem (Icon, Name);
hist.TakeSnapshotOfLayer (PintaCore.Layers.CurrentLayer);
PintaCore.Layers.ToolLayer.Clear ();
ImageSurface surface = PintaCore.Layers.ToolLayer.Surface;
ColorBgra* surf_data_ptr = (ColorBgra*)surface.DataPtr;
int surf_width = surface.Width;
for (int x = 0; x < stencil.Width; x++)
for (int y = 0; y < stencil.Height; y++)
if (stencil.GetUnchecked (x, y))
surface.SetPixel (surf_data_ptr, surf_width, x, y, fill_color);
using (Context g = new Context (PintaCore.Layers.CurrentLayer.Surface)) {
g.AppendPath (PintaCore.Layers.SelectionPath);
g.FillRule = FillRule.EvenOdd;
g.Clip ();
g.Antialias = Antialias.Subpixel;
g.SetSource (surface);
g.Paint ();
}
PintaCore.History.PushNewItem (hist);
PintaCore.Workspace.Invalidate ();
}示例5: DrawShape
protected override Rectangle DrawShape(Rectangle rect, Layer l)
{
Document doc = PintaCore.Workspace.ActiveDocument;
Rectangle dirty;
using (Context g = new Context (l.Surface)) {
g.AppendPath (doc.SelectionPath);
g.FillRule = FillRule.EvenOdd;
g.Clip ();
g.Antialias = UseAntialiasing ? Antialias.Subpixel : Antialias.None;
dirty = g.DrawLine (shape_origin, current_point , outline_color, BrushWidth);
}
return dirty;
}示例6: DrawShape
protected override Rectangle DrawShape(Rectangle rect, Layer l)
{
Rectangle dirty;
using (Context g = new Context (l.Surface)) {
g.AppendPath (PintaCore.Layers.SelectionPath);
g.FillRule = FillRule.EvenOdd;
g.Clip ();
g.Antialias = Antialias.Subpixel;
if (FillShape && StrokeShape)
dirty = g.FillStrokedRectangle (rect, fill_color, outline_color, BrushWidth);
else if (FillShape)
dirty = g.FillRectangle (rect, outline_color);
else
dirty = g.DrawRectangle (rect, outline_color, BrushWidth);
}
return dirty;
}示例7: OnFillRegionComputed
protected unsafe override void OnFillRegionComputed(Point[][] polygonSet)
{
SimpleHistoryItem hist = new SimpleHistoryItem (Icon, Name);
hist.TakeSnapshotOfLayer (PintaCore.Layers.CurrentLayer);
using (Context g = new Context (PintaCore.Layers.CurrentLayer.Surface)) {
g.AppendPath (PintaCore.Layers.SelectionPath);
g.FillRule = FillRule.EvenOdd;
g.Clip ();
// Reset FillRule to the default
g.FillRule = FillRule.Winding;
g.AppendPath (g.CreatePolygonPath (polygonSet));
g.Antialias = Antialias.Subpixel;
g.Color = fill_color;
g.Fill ();
}
PintaCore.History.PushNewItem (hist);
PintaCore.Workspace.Invalidate ();
}示例8: DrawShape
protected override Rectangle DrawShape(Rectangle rect, Layer l)
{
Document doc = PintaCore.Workspace.ActiveDocument;
Rectangle dirty;
using (Context g = new Context (l.Surface)) {
g.AppendPath (doc.Selection.SelectionPath);
g.FillRule = FillRule.EvenOdd;
g.Clip ();
g.Antialias = UseAntialiasing ? Antialias.Subpixel : Antialias.None;
if (FillShape && StrokeShape)
dirty = g.FillStrokedRectangle (rect, fill_color, outline_color, BrushWidth);
else if (FillShape)
dirty = g.FillRectangle (rect, outline_color);
else
dirty = g.DrawRectangle (rect, outline_color, BrushWidth);
}
return dirty;
}示例9: Draw
private void Draw(DrawingArea drawingarea1, Color tool_color, Cairo.PointD point, bool first_pixel)
{
int x = (int)point.X;
int y = (int) point.Y;
if (last_point.Equals (point_empty)) {
last_point = new Point (x, y);
if (!first_pixel)
return;
}
Document doc = PintaCore.Workspace.ActiveDocument;
if (doc.Workspace.PointInCanvas (point))
surface_modified = true;
ImageSurface surf = PintaCore.Layers.CurrentLayer.Surface;
if (first_pixel) {
// Does Cairo really not support a single-pixel-long single-pixel-wide line?
surf.Flush ();
int shiftedX = (int)point.X;
int shiftedY = (int)point.Y;
ColorBgra source = surf.GetColorBgraUnchecked (shiftedX, shiftedY);
source = UserBlendOps.NormalBlendOp.ApplyStatic (source, tool_color.ToColorBgra ());
surf.SetColorBgra (source, shiftedX, shiftedY);
surf.MarkDirty ();
} else {
using (Context g = new Context (surf)) {
g.AppendPath (doc.Selection.SelectionPath);
g.FillRule = FillRule.EvenOdd;
g.Clip ();
g.Antialias = Antialias.None;
// Adding 0.5 forces cairo into the correct square:
// See https://bugs.launchpad.net/bugs/672232
g.MoveTo (last_point.X + 0.5, last_point.Y + 0.5);
g.LineTo (x + 0.5, y + 0.5);
g.Color = tool_color;
g.LineWidth = 1;
g.LineCap = LineCap.Square;
g.Stroke ();
}
}
Gdk.Rectangle r = GetRectangleFromPoints (last_point, new Point (x, y));
doc.Workspace.Invalidate (r);
last_point = new Point (x, y);
}示例10: clip
public void clip(Context cr, int width, int height)
{
Normalize (cr, width, height);
cr.Arc(0.5, 0.5, 0.3, 0, 2 * Math.PI);
cr.Clip();
cr.NewPath(); // current path is not consumed by cairo_clip()
cr.Rectangle(0, 0, 1, 1);
cr.Fill();
cr.Color = new Color (0, 1, 0);
cr.MoveTo(0, 0);
cr.LineTo(1, 1);
cr.MoveTo(1, 0);
cr.LineTo(0, 1);
cr.Stroke();
}示例11: Draw
void Draw (Context ctx)
{
int tabArea = tabEndX - tabStartX;
int x = GetRenderOffset ();
const int y = 0;
int n = 0;
Action<Context> drawActive = c => {
};
var drawCommands = new List<Action<Context>> ();
for (; n < notebook.Tabs.Count; n++) {
if (x + TabWidth < tabStartX) {
x += TabWidth;
continue;
}
if (x > tabEndX)
break;
int closingWidth;
var cmd = DrawClosingTab (n, new Gdk.Rectangle (x, y, 0, Allocation.Height), out closingWidth);
drawCommands.Add (cmd);
x += closingWidth;
var tab = (DockNotebookTab)notebook.Tabs [n];
bool active = tab == notebook.CurrentTab;
int width = Math.Min (TabWidth, Math.Max (50, tabEndX - x - 1));
if (tab == notebook.Tabs.Last ())
width += LastTabWidthAdjustment;
width = (int)(width * tab.WidthModifier);
if (active) {
int tmp = x;
drawActive = c => DrawTab (c, tab, Allocation, new Gdk.Rectangle (tmp, y, width, Allocation.Height), true, true, draggingTab, CreateTabLayout (tab));
tab.Allocation = new Gdk.Rectangle (tmp, Allocation.Y, width, Allocation.Height);
} else {
int tmp = x;
bool highlighted = tab == highlightedTab;
if (tab.SaveStrength > 0.0f) {
tmp = (int)(tab.SavedAllocation.X + (tmp - tab.SavedAllocation.X) * (1.0f - tab.SaveStrength));
}
drawCommands.Add (c => DrawTab (c, tab, Allocation, new Gdk.Rectangle (tmp, y, width, Allocation.Height), highlighted, false, false, CreateTabLayout (tab)));
tab.Allocation = new Gdk.Rectangle (tmp, Allocation.Y, width, Allocation.Height);
}
x += width;
}
var allocation = Allocation;
int tabWidth;
drawCommands.Add (DrawClosingTab (n, new Gdk.Rectangle (x, y, 0, allocation.Height), out tabWidth));
drawCommands.Reverse ();
DrawBackground (ctx, allocation);
// Draw breadcrumb bar header
if (notebook.Tabs.Count > 0) {
ctx.Rectangle (0, allocation.Height - BottomBarPadding, allocation.Width, BottomBarPadding);
ctx.SetSourceColor (Styles.BreadcrumbBackgroundColor);
ctx.Fill ();
}
ctx.Rectangle (tabStartX - LeanWidth / 2, allocation.Y, tabArea + LeanWidth, allocation.Height);
ctx.Clip ();
foreach (var cmd in drawCommands)
cmd (ctx);
ctx.ResetClip ();
// Redraw the dragging tab here to be sure its on top. We drew it before to get the sizing correct, this should be fixed.
drawActive (ctx);
}示例12: DrawChannel
private void DrawChannel(Context g, ColorBgra color, int channel, long max, float mean)
{
Rectangle rect = Allocation.ToCairoRectangle ();
Histogram histogram = Histogram;
int l = (int)rect.X;
int t = (int)rect.Y;
int r = (int)(rect.X + rect.Width);
int b = (int)(rect.Y + rect.Height);
int entries = histogram.Entries;
long[] hist = histogram.HistogramValues [channel];
++max;
if (FlipHorizontal) {
Utility.Swap(ref l, ref r);
}
if (!FlipVertical) {
Utility.Swap(ref t, ref b);
}
PointD[] points = new PointD[entries + 2];
points[entries] = new PointD (Utility.Lerp (l, r, -1), Utility.Lerp (t, b, 20));
points[entries + 1] = new PointD (Utility.Lerp (l, r, -1), Utility.Lerp (b, t, 20));
for (int i = 0; i < entries; i += entries - 1) {
points[i] = new PointD (
Utility.Lerp (l, r, (float)hist[i] / (float)max),
Utility.Lerp (t, b, (float)i / (float)entries));
CheckPoint (rect, points [i]);
}
long sum3 = hist[0] + hist[1];
for (int i = 1; i < entries - 1; ++i) {
sum3 += hist[i + 1];
points[i] = new PointD(
Utility.Lerp(l, r, (float)(sum3) / (float)(max * 3.1f)),
Utility.Lerp(t, b, (float)i / (float)entries));
CheckPoint (rect, points [i]);
sum3 -= hist[i - 1];
}
byte intensity = selected[channel] ? (byte)96 : (byte)32;
ColorBgra pen_color = ColorBgra.Blend (ColorBgra.Black, color, intensity);
ColorBgra brush_color = color;
brush_color.A = intensity;
g.LineWidth = 1;
g.Rectangle (rect);
g.Clip ();
g.DrawPolygonal (points, pen_color.ToCairoColor ());
g.FillPolygonal (points, brush_color.ToCairoColor ());
}示例13: Crop
public void Crop(Gdk.Rectangle rect, Path path)
{
ImageSurface dest = new ImageSurface (Format.Argb32, rect.Width, rect.Height);
using (Context g = new Context (dest)) {
// Move the selected content to the upper left
g.Translate (-rect.X, -rect.Y);
g.Antialias = Antialias.None;
// Respect the selected path
g.AppendPath (path);
g.FillRule = Cairo.FillRule.EvenOdd;
g.Clip ();
g.SetSource (Surface);
g.Paint ();
}
(Surface as IDisposable).Dispose ();
Surface = dest;
}示例14: OnStartTransform
protected override void OnStartTransform()
{
base.OnStartTransform ();
Document doc = PintaCore.Workspace.ActiveDocument;
original_selection = new List<List<IntPoint>> (doc.Selection.SelectionPolygons);
original_transform.InitMatrix (doc.SelectionLayer.Transform);
hist = new MovePixelsHistoryItem (Icon, Name, doc);
hist.TakeSnapshot (!doc.ShowSelectionLayer);
if (!doc.ShowSelectionLayer) {
// Copy the selection to the temp layer
doc.CreateSelectionLayer ();
doc.ShowSelectionLayer = true;
using (Cairo.Context g = new Cairo.Context (doc.SelectionLayer.Surface)) {
g.AppendPath (doc.Selection.SelectionPath);
g.FillRule = FillRule.EvenOdd;
g.SetSource (doc.CurrentUserLayer.Surface);
g.Clip ();
g.Paint ();
}
Cairo.ImageSurface surf = doc.CurrentUserLayer.Surface;
using (Cairo.Context g = new Cairo.Context (surf)) {
g.AppendPath (doc.Selection.SelectionPath);
g.FillRule = FillRule.EvenOdd;
g.Operator = Cairo.Operator.Clear;
g.Fill ();
}
}
PintaCore.Workspace.Invalidate ();
}示例15: GetClippedLayer
public ImageSurface GetClippedLayer(int index)
{
Cairo.ImageSurface surf = new Cairo.ImageSurface (Cairo.Format.Argb32, ImageSize.Width, ImageSize.Height);
using (Cairo.Context g = new Cairo.Context (surf)) {
g.AppendPath (SelectionPath);
g.Clip ();
g.SetSource (Layers[index].Surface);
g.Paint ();
}
return surf;
}