本文整理汇总了C#中Cairo.Context.Scale方法的典型用法代码示例。如果您正苦于以下问题：C# Context.Scale方法的具体用法？C# Context.Scale怎么用？C# Context.Scale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.Scale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: OnTransformIp
protected override FlowReturn OnTransformIp (Gst.Buffer buf) {
if (!buf.IsWritable)
return FlowReturn.Error;
Cairo.ImageSurface img = new Cairo.ImageSurface (buf.Data, Cairo.Format.Rgb24, width, height, width*4);
using (Cairo.Context context = new Cairo.Context (img)) {
double dx = (double) ( (buf.Timestamp / Clock.MSecond) % 2180) / 5;
context.Save ();
context.Scale (width / 640.0, height / 480.0);
context.MoveTo (300, 10 + dx);
context.LineTo (500 - dx, 400);
context.LineWidth = 4.0;
context.Color = new Color (0, 0, 1.0);
context.Stroke();
context.Restore ();
if (lastX != -1 && lastY != -1) {
context.Color = new Color (1.0, 0, 0);
context.Translate (lastX, lastY);
context.Scale (Math.Min (width / 640.0, height / 480.0), Math.Min (width / 640.0, height / 480.0));
context.Arc (0, 0, 10.0, 0.0, 2 * Math.PI);
context.Fill();
}
}
img.Destroy ();
return base.OnTransformIp (buf);
}示例2: Draw
protected override void Draw(Context cr, Pixbuf prev, Pixbuf next, int width, int height, double progress)
{
cr.Color = new Color (0, 0, 0);
if (prev != null) {
double scale = Math.Min ((double)width/(double)prev.Width, (double)height/(double)prev.Height);
cr.Save ();
cr.Translate (-progress * width, 0);
cr.Rectangle (0, 0, width, .5 * (height - scale*prev.Height));
cr.Fill ();
cr.Rectangle (0, height - .5 * (height - scale*prev.Height), width, .5 * (height - scale*prev.Height));
cr.Fill ();
cr.Rectangle (0, 0, .5 * (width - scale*prev.Width), height);
cr.Fill ();
cr.Rectangle (width - .5 * (width - scale*prev.Width), 0, .5 * (width - scale*prev.Width), height);
cr.Fill ();
cr.Rectangle (0, 0, width, height);
cr.Scale (scale, scale);
CairoHelper.SetSourcePixbuf (cr, prev, .5 * ((double)width/scale - prev.Width), .5 * ((double)height/scale - prev.Height));
cr.Fill ();
cr.Restore ();
}
if (next != null) {
double scale = Math.Min ((double)width/(double)next.Width, (double)height/(double)next.Height);
cr.Save ();
cr.Translate (width * (1.0 - progress), 0);
cr.Rectangle (0, 0, width, .5 * (height - scale*next.Height));
cr.Fill ();
cr.Rectangle (0, height - .5 * (height - scale*next.Height), width, .5 * (height - scale*next.Height));
cr.Fill ();
cr.Rectangle (0, 0, .5 * (width - scale*next.Width), height);
cr.Fill ();
cr.Rectangle (width - .5 * (width - scale*next.Width), 0, .5 * (width - scale*next.Width), height);
cr.Fill ();
cr.Rectangle (0, 0, width, height);
cr.Scale (scale, scale);
CairoHelper.SetSourcePixbuf (cr, next, .5 * ((double)width/scale - next.Width), .5 * ((double)height/scale - next.Height));
cr.Fill ();
cr.Restore ();
}
}示例3: Draw
protected override void Draw(Context cr, Pixbuf prev, Pixbuf next, int width, int height, double progress)
{
cr.SetSourceColor (new Color (0, 0, 0, progress));
if (next != null) {
double scale = Math.Min ((double)width/(double)next.Width, (double)height/(double)next.Height);
cr.Save ();
cr.Rectangle (0, 0, width, .5 * (height - scale*next.Height));
cr.Fill ();
cr.Rectangle (0, height - .5 * (height - scale*next.Height), width, .5 * (height - scale*next.Height));
cr.Fill ();
cr.Rectangle (0, 0, .5 * (width - scale*next.Width), height);
cr.Fill ();
cr.Rectangle (width - .5 * (width - scale*next.Width), 0, .5 * (width - scale*next.Width), height);
cr.Fill ();
cr.Rectangle (0, 0, width, height);
cr.Scale (scale, scale);
CairoHelper.SetSourcePixbuf (cr, next, .5 * ((double)width/scale - next.Width), .5 * ((double)height/scale - next.Height));
cr.PaintWithAlpha (progress);
cr.Restore ();
}
}示例4: draw
static void draw (Context cr, int width, int height)
{
double xc = 0.5;
double yc = 0.5;
double radius = 0.4;
double angle1 = 45.0 * (Math.PI / 180.0); // angles are specified
double angle2 = 180.0 * (Math.PI / 180.0); // in radians
cr.Scale (width, height);
cr.LineWidth = 0.04;
cr.Arc (xc, yc, radius, angle1, angle2);
cr.Stroke ();
// draw helping lines
cr.Color = new Color(1, 0.2, 0.2, 0.6);
cr.Arc (xc, yc, 0.05, 0, 2 * Math.PI);
cr.Fill ();
cr.LineWidth = 0.03;
cr.Arc (xc, yc, radius, angle1, angle1);
cr.LineTo (new PointD (xc, yc));
cr.Arc (xc, yc, radius, angle2, angle2);
cr.LineTo (new PointD (xc, yc));
cr.Stroke ();
}示例5: Draw
void Draw(Context cr, int width, int height)
{
cr.LineWidth = 1.0;
cr.Color = new Color(1.0, 1.0, 1.0);
cr.Rectangle(0, 0, width, height);
cr.Fill();
cr.Save();
cr.Scale(scale_factor, scale_factor);
try
{
if(diagram != null)
{
DiagramRenderer dr = new DiagramRenderer(cr, width, height, diagram);
cr.Color = new Color(0.0, 0.0, 0.0);
dr.Render();
dr.Draw();
}
}
catch
{
error_counter++;
}
cr.Restore();
}示例6: OvalPath
void OvalPath (Context cr, double xc, double yc, double xr, double yr)
{
Matrix m = cr.Matrix;
cr.Translate (xc, yc);
cr.Scale (1.0, yr / xr);
cr.MoveTo (xr, 0.0);
cr.Arc (0, 0, xr, 0, 2 * Math.PI);
cr.ClosePath ();
cr.Matrix = m;
}示例7: Render
public static void Render (Context cr, Rectangle box,
double xalign, double yalign, Color innerColor, Color outerColor)
{
// virtual size of the figure we will draw below on the 1:1 scale
double original_width = 8;
double original_height = 12;
// figure out the scale dimensions of the bounding box and the glyph
double box_size = Math.Min (box.Width, box.Height);
double original_size = Math.Max (original_width, original_height);
// create a scale for the box (ratio between virtual glyph size and the box),
// then re-scale to account for the extra size that will be added via stroke.
// glyph_scale is the stroke width and the actual transformation size
double box_scale = box_size / original_size;
double glyph_scale = Math.Floor ((box_size - box_scale) / original_size);
// compute the alignment to the pixel grid for the stroke/scale
double pixel_align = Math.Floor (glyph_scale + 0.5) / 2.0;
// figure out the actual size in pixels of the glyph
double actual_width = glyph_scale * original_width + 2 * Math.Floor (pixel_align);
double actual_height = glyph_scale * original_height + 2 * Math.Floor (pixel_align);
// compute the offset accounting for box, grid alignment, and figure alignment
double tx = box.X + pixel_align + Math.Round ((box.Width - actual_width) * xalign);
double ty = box.Y + pixel_align + Math.Round ((box.Height - actual_height) * yalign);
// save the context, and transform the current/new context
cr.Save ();
cr.Translate (tx, ty);
cr.Scale (glyph_scale, glyph_scale);
// define how the strokes look
cr.LineWidth = 1;
cr.LineCap = LineCap.Round;
cr.LineJoin = LineJoin.Round;
// inner 'b' note
cr.Color = innerColor;
cr.MoveTo (0, 2);
cr.LineTo (2, 0);
cr.Arc (4, 8, 2, Math.PI, Math.PI * 3);
cr.Stroke ();
// outer 'cut' circle
cr.Color = outerColor;
cr.Arc (4, 8, 4, Math.PI * 1.5, Math.PI * 1.12);
cr.Stroke ();
cr.Restore ();
}示例8: DrawBasis
public void DrawBasis(Context cr, int CubePxSize)
{
if (OriginalFile == null)
return;
if (DrawingSvg == null)
ModifyDrawingImage();
FrameScale = DrawingSvg.Dimensions.Width / SvgWidht;
double ratio = CubePxSize / (BaseWidht * FrameScale);
cr.Scale(ratio, ratio);
cr.Translate(0.0 - ((BaseX - AddX) * FrameScale), 0.0 - ((BaseY - AddY) * FrameScale));
DrawingSvg.RenderCairo(cr);
}示例9: 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10: BasicDraw
public override void BasicDraw (Context context) {
double midwidth = DisplayBox.Width / 2.0;
double midheight = DisplayBox.Height / 2.0;
context.LineWidth = LineWidth;
context.Save ();
context.Translate (DisplayBox.X + midwidth, DisplayBox.Y + midheight);
context.Scale (midwidth - 1.0, midheight - 1.0);
context.Arc (0.0, 0.0, 1.0, 0.0, 2.0 * Math.PI);
context.Restore ();
context.Color = FillColor;
context.FillPreserve ();
context.Color = LineColor;
context.Stroke ();
}示例11: Draw
//FIXME: Figure produces invalid results
public override PointD Draw(Context context, PointD a, PointD b)
{
// Save context
context.Save ();
if (_scaleX != _scaleY)
context.Scale(_scaleX, _scaleY);
var midpoint = new PointD (a.X + 2 * _radius, a.Y + 2 * _radius);
context.Arc (midpoint.X, midpoint.Y, _radius, 0, (2 * Math.PI));
context.Restore ();
context.Stroke ();
return Geometry.EdgePointOfCircle (midpoint, _radius, b);
}示例12: Draw
void Draw(Context cr, int width, int height)
{
Surface overlay = cr.Target.CreateSimilar(Content.ColorAlpha, width, height);
Surface addSurface = cr.Target.CreateSimilar(Content.ColorAlpha, width, height);
// FillChecks (cr, 0, 0,width, height);//w, h);
// cr.Save ();
using (Context cr_overlay = new Context(overlay))
if (listPoint != null && listPoint.Count > 0) {
using (Context cr_addSurface = new Context(addSurface)) {
BarierPoint actualPoint;
BarierPoint nearstBP;
for (int i = 0; i < listPoint.Count; i++) {
actualPoint = listPoint[i];
if (i == listPoint.Count-1) {
nearstBP = listPoint[0];
} else
nearstBP = listPoint[i + 1];
Cairo.Color clrPoint;
if (actualPoint.Equals(movingPoint))
clrPoint =colorSelectPoint;
else
clrPoint = colorPoint;
cr_addSurface.Color = clrPoint;
OvalPath(cr_addSurface, actualPoint.X * scaling, actualPoint.Y * scaling, pointWidth, pointWidth);
cr_addSurface.Fill();
cr_addSurface.Color = colorLine;
LinePath(cr_addSurface, actualPoint.X * scaling, actualPoint.Y * scaling, nearstBP.X * scaling, nearstBP.Y * scaling);
cr_addSurface.Fill();
}
cr_overlay.Operator = Operator.Add;
cr_overlay.SetSourceSurface(addSurface, 0, 0);
cr_overlay.Paint();
}
cr.Scale(1 / scaling, 1 / scaling);
cr.SetSourceSurface(overlay, (int)(drawOffsetX), (int)(drawOffsetY));
cr.Paint();
}
addSurface.Destroy();
overlay.Destroy();
}示例13: Draw
/**
The Draw method draws the clock on the given Cairo.Context in a width by
height -area.
Draw clears the canvas, sets up the clock transform and calls the clock
drawing methods. In the clock transform, the clock area coords go from
-1.0 to 1.0, rotation 0 is at 12:00 and rotation increases clockwise.
The clock drawing functions are DrawClockFace, DrawHourHand, DrawMinuteHand,
DrawSecondHand and DrawPin. The transform origin is at the middle of the
window and the transform preserves the aspect ratio.
All operations on the context take place inside a Save-Restore -pair.
@param cr Cairo.Context to draw on.
@param width The width of the drawable area.
@param height The height of the drawable area.
*/
void Draw(Context cr, uint width, uint height)
{
uint boxSize = Math.Min (width, height);
DateTime date = DateTime.Now;
cr.Save ();
// Clear the canvas
cr.Color = new Color (1, 1, 1);
cr.Rectangle (0, 0, width, height);
cr.Fill ();
// Set canvas transform so that the coords go from -1.0 to 1.0,
// rotation 0.0 is 12:00 and rotation increases clockwise.
//
// First, center the clock box to the window.
cr.Translate ((width - boxSize) / 2.0, (height - boxSize) / 2.0);
// Then scale the box so that -1.0 .. 1.0 spans the whole box.
cr.Scale (boxSize / 2.0, boxSize / 2.0);
// And move the origin to the center of the box.
cr.Translate (1.0, 1.0);
// Finally, rotate CCW by 90 degrees to make rotation 0 point up.
// We don't need to flip the rotation direction, because angle grows
// clockwise in the "Y grows down" default transform.
cr.Rotate (-Math.PI / 2.0);
// Draw the clock
DrawClockFace (cr);
DrawHourHand (cr, (uint)date.Hour);
DrawMinuteHand (cr, (uint)date.Minute);
DrawSecondHand (cr, (uint)date.Second);
DrawPin (cr);
cr.Restore ();
}示例14: SetAsSource
public override void SetAsSource(Context ctx, Rectangle bounds = default(Rectangle))
{
float widthRatio = 1f;
float heightRatio = 1f;
if (Scaled){
widthRatio = (float)bounds.Width / Dimensions.Width;
heightRatio = (float)bounds.Height / Dimensions.Height;
}
if (KeepProportions) {
if (widthRatio < heightRatio)
heightRatio = widthRatio;
else
widthRatio = heightRatio;
}
using (ImageSurface tmp = new ImageSurface (Format.Argb32, bounds.Width, bounds.Height)) {
using (Cairo.Context gr = new Context (tmp)) {
gr.Translate (bounds.Left, bounds.Top);
gr.Scale (widthRatio, heightRatio);
gr.Translate ((bounds.Width/widthRatio - Dimensions.Width)/2, (bounds.Height/heightRatio - Dimensions.Height)/2);
hSVG.RenderCairo (gr);
}
ctx.SetSource (tmp);
}
}示例15: DrawSelected
public override void DrawSelected(Context context)
{
context.Save ();
context.Translate (DisplayBox.X, DisplayBox.Y);
context.Scale (DisplayBox.Width, DisplayBox.Height);
context.Rectangle (0.0, 0.0, 1, 1);
context.Restore ();
context.Save ();
context.LineWidth = 3;
context.Color = new Cairo.Color (1, 0.0784314, 0.576471, 1);
context.Stroke ();
context.Restore ();
context.Save ();
BasicDrawSelected (context);
foreach (IFigure fig in FiguresEnumerator) {
fig.Draw (context);
}
context.Restore ();
}