本文整理汇总了C#中CGBitmapContext.SetRGBFillColor方法的典型用法代码示例。如果您正苦于以下问题：C# CGBitmapContext.SetRGBFillColor方法的具体用法？C# CGBitmapContext.SetRGBFillColor怎么用？C# CGBitmapContext.SetRGBFillColor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CGBitmapContext的用法示例。
在下文中一共展示了CGBitmapContext.SetRGBFillColor方法的6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: DrawScreen
protected void DrawScreen ()
{
// create our offscreen bitmap context
// size
SizeF bitmapSize = new SizeF (imageView.Frame.Size);
using (CGBitmapContext context = new CGBitmapContext (IntPtr.Zero, (int)bitmapSize.Width, (int)bitmapSize.Height, 8, (int)(4 * bitmapSize.Width), CGColorSpace.CreateDeviceRGB (), CGImageAlphaInfo.PremultipliedFirst)) {
// save the state of the context while we change the CTM
context.SaveState ();
// draw our circle
context.SetRGBFillColor (1, 0, 0, 1);
context.TranslateCTM (currentLocation.X, currentLocation.Y);
context.RotateCTM (currentRotation);
context.ScaleCTM (currentScale, currentScale);
context.FillRect (new RectangleF (-10, -10, 20, 20));
// restore our transformations
context.RestoreState ();
// draw our coordinates for reference
DrawCoordinateSpace (context);
// output the drawing to the view
imageView.Image = UIImage.FromImage (context.ToImage ());
}
}示例2: AdjustImage
public static UIImage AdjustImage(RectangleF rect, UIImage template, CGBlendMode mode, float red, float green, float blue, float alpha)
{
using (var cs = CGColorSpace.CreateDeviceRGB ())
{
using (var context = new CGBitmapContext (IntPtr.Zero, (int)rect.Width, (int)rect.Height, 8, (int)rect.Height * 4, cs, CGImageAlphaInfo.PremultipliedLast))
{
context.TranslateCTM (0.0f, 0f);
//context.ScaleCTM(1.0f,-1.0f);
context.DrawImage (rect, template.CGImage);
context.SetBlendMode (mode);
context.ClipToMask (rect, template.CGImage);
context.SetRGBFillColor (red, green, blue, alpha);
context.FillRect (rect);
return UIImage.FromImage (context.ToImage ());
}
}
}示例3: MakeCalendarBadge
public static UIImage MakeCalendarBadge(UIImage template, string smallText, string bigText)
{
using (var cs = CGColorSpace.CreateDeviceRGB ()){
using (var context = new CGBitmapContext (IntPtr.Zero, 57, 57, 8, 57*4, cs, CGImageAlphaInfo.PremultipliedLast)){
//context.ScaleCTM (0.5f, -1);
context.TranslateCTM (0, 0);
context.DrawImage (new RectangleF (0, 0, 57, 57), template.CGImage);
context.SetRGBFillColor (1, 1, 1, 1);
context.SelectFont ("Helvetica", 10f, CGTextEncoding.MacRoman);
// Pretty lame way of measuring strings, as documented:
var start = context.TextPosition.X;
context.SetTextDrawingMode (CGTextDrawingMode.Invisible);
context.ShowText (smallText);
var width = context.TextPosition.X - start;
//var ns = new NSString (smallText);
//UIFont ff = UIFont.FromName ("Helvetica", 10);
context.SetTextDrawingMode (CGTextDrawingMode.Fill);
context.ShowTextAtPoint ((57-width)/2, 46, smallText);
// The big string
context.SelectFont ("Helvetica-Bold", 32, CGTextEncoding.MacRoman);
start = context.TextPosition.X;
context.SetTextDrawingMode (CGTextDrawingMode.Invisible);
context.ShowText (bigText);
width = context.TextPosition.X - start;
context.SetRGBFillColor (0, 0, 0, 1);
context.SetTextDrawingMode (CGTextDrawingMode.Fill);
context.ShowTextAtPoint ((57-width)/2, 9, bigText);
context.StrokePath ();
return UIImage.FromImage (context.ToImage ());
}
}
}示例4: Render
/// <summary>
/// Render the current complete scene.
/// </summary>
void Render()
{
try
{
lock (_renderSynchronisation)
{
RectangleF rect = _rect;
// create the view.
View2D view = _cacheRenderer.Create((int)(rect.Width * _extra), (int)(rect.Height * _extra),
this.Map, (float)this.Map.Projection.ToZoomFactor(this.MapZoom),
this.MapCenter, _invertX, _invertY, this.MapTilt);
if (rect.Width == 0)
{ // only render if a proper size is known.
return;
}
// calculate width/height.
int imageWidth = (int)(rect.Width * _extra * _scaleFactor);
int imageHeight = (int)(rect.Height * _extra * _scaleFactor);
// create a new bitmap context.
CGColorSpace space = CGColorSpace.CreateDeviceRGB();
int bytesPerPixel = 4;
int bytesPerRow = bytesPerPixel * imageWidth;
int bitsPerComponent = 8;
// get old image if available.
CGBitmapContext image = new CGBitmapContext(null, imageWidth, imageHeight,
bitsPerComponent, bytesPerRow,
space, // kCGBitmapByteOrder32Little | kCGImageAlphaNoneSkipLast
CGBitmapFlags.PremultipliedFirst | CGBitmapFlags.ByteOrder32Big);
long before = DateTime.Now.Ticks;
// build the layers list.
var layers = new List<Layer>();
for (int layerIdx = 0; layerIdx < this.Map.LayerCount; layerIdx++)
{
layers.Add(this.Map[layerIdx]);
}
// add the internal layer.
try
{
image.SetRGBFillColor(1, 1, 1, 1);
image.FillRect(new RectangleF(
0, 0, imageWidth, imageHeight));
// notify the map that the view has changed.
this.Map.ViewChanged((float)this.Map.Projection.ToZoomFactor(this.MapZoom), this.MapCenter,
view);
long afterViewChanged = DateTime.Now.Ticks;
OsmSharp.Logging.Log.TraceEvent("OsmSharp.Android.UI.MapView", TraceEventType.Information,
"View change took: {0}ms @ zoom level {1}",
(new TimeSpan(afterViewChanged - before).TotalMilliseconds), this.MapZoom);
float sceneZoomFactor = (float)this.Map.Projection.ToZoomFactor(this.MapZoom);
// does the rendering.
bool complete = _cacheRenderer.Render(new CGContextWrapper(image,
new RectangleF(0, 0, (int)(rect.Width * _extra), (int)(rect.Height * _extra))),
layers, view, sceneZoomFactor);
long afterRendering = DateTime.Now.Ticks;
OsmSharp.Logging.Log.TraceEvent("OsmSharp.Android.UI.MapView", TraceEventType.Information,
"Rendering took: {0}ms @ zoom level {1}",
(new TimeSpan(afterRendering - afterViewChanged).TotalMilliseconds), this.MapZoom);
if (complete)
{ // there was no cancellation, the rendering completely finished.
lock (_bufferSynchronisation)
{
if (_onScreenBuffer != null &&
_onScreenBuffer.Tag != null)
{ // on screen buffer.
(_onScreenBuffer.Tag as CGImage).Dispose();
}
// add the newly rendered image again.
_onScreenBuffer = new ImageTilted2D(view.Rectangle, new byte[0], float.MinValue, float.MaxValue);
_onScreenBuffer.Tag = image.ToImage();
// store the previous view.
_previousRenderedZoom = view;
}
this.InvokeOnMainThread(InvalidateMap);
}
long after = DateTime.Now.Ticks;
OsmSharp.Logging.Log.TraceEvent("OsmSharp.iOS.UI.MapView", TraceEventType.Information,
"Rendering in {0}ms", new TimeSpan(after - before).TotalMilliseconds);
}
finally
{
//.........这里部分代码省略.........
示例5: Render
/// <summary>
/// Render the current complete scene.
/// </summary>
void Render()
{
try
{
if (Monitor.TryEnter(_cacheRenderer, 1000))
{
try
{
// use object
RectangleF rect = _rect;
// create the view.
float size = System.Math.Max(_rect.Width, _rect.Height);
var view = _cacheRenderer.Create((int)(size * _extra), (int)(size * _extra),
this.Map, (float)this.Map.Projection.ToZoomFactor(this.MapZoom),
this.MapCenter, _invertX, _invertY, this.MapTilt);
if (rect.Width == 0)
{ // only render if a proper size is known.
return;
}
// calculate width/height.
int imageWidth = (int)(size * _extra * _scaleFactor);
int imageHeight = (int)(size * _extra * _scaleFactor);
// create a new bitmap context.
CGColorSpace space = CGColorSpace.CreateDeviceRGB();
int bytesPerPixel = 4;
int bytesPerRow = bytesPerPixel * imageWidth;
int bitsPerComponent = 8;
// get old image if available.
CGBitmapContext image = new CGBitmapContext(null, imageWidth, imageHeight,
bitsPerComponent, bytesPerRow,
space, // kCGBitmapByteOrder32Little | kCGImageAlphaNoneSkipLast
CGBitmapFlags.PremultipliedFirst | CGBitmapFlags.ByteOrder32Big);
long before = DateTime.Now.Ticks;
// build the layers list.
var layers = new List<Layer>();
for (int layerIdx = 0; layerIdx < this.Map.LayerCount; layerIdx++)
{
layers.Add(this.Map[layerIdx]);
}
// add the internal layer.
try
{
image.SetRGBFillColor(1, 1, 1, 1);
image.FillRect(new RectangleF(
0, 0, imageWidth, imageHeight));
// notify the map that the view has changed.
var normalView = _cacheRenderer.Create(_rect.Width, _rect.Height,
this.Map, (float)this.Map.Projection.ToZoomFactor(this.MapZoom),
this.MapCenter, _invertX, _invertY, this.MapTilt);
this.Map.ViewChanged((float)this.Map.Projection.ToZoomFactor(this.MapZoom), this.MapCenter,
normalView, view);
long afterViewChanged = DateTime.Now.Ticks;
OsmSharp.Logging.Log.TraceEvent("OsmSharp.Android.UI.MapView", TraceEventType.Information,
"View change took: {0}ms @ zoom level {1}",
(new TimeSpan(afterViewChanged - before).TotalMilliseconds), this.MapZoom);
float zoomFactor = this.MapZoom;
float sceneZoomFactor = (float)this.Map.Projection.ToZoomFactor(this.MapZoom);
// does the rendering.
bool complete = _cacheRenderer.Render(new CGContextWrapper(image,
new RectangleF(0, 0, (int)(size * _extra), (int)(size * _extra))),
_map.Projection, layers, view, sceneZoomFactor);
long afterRendering = DateTime.Now.Ticks;
if (complete)
{ // there was no cancellation, the rendering completely finished.
lock (_bufferSynchronisation)
{
if (_onScreenBuffer != null &&
_onScreenBuffer.NativeImage != null)
{ // on screen buffer.
_onScreenBuffer.NativeImage.Dispose();
}
// add the newly rendered image again.
_onScreenBuffer = new ImageTilted2D(view.Rectangle,
new NativeImage(image.ToImage()), float.MinValue, float.MaxValue);
// store the previous view.
_previouslyRenderedView = view;
}
// make sure this view knows that there is a new rendering.
this.InvokeOnMainThread(SetNeedsDisplay);
}
long after = DateTime.Now.Ticks;
//.........这里部分代码省略.........
示例6: CreateTextBitmapContext
CGBitmapContext CreateTextBitmapContext (string str, out byte[] bitmapData)
{
NSString text = new NSString (str);
UIFont font = UIFont.FromName ("HelveticaNeue-Light", 128);
SizeF size = text.StringSize (font);
int width = (int)size.Width;
int height = (int)size.Height;
bitmapData = new byte[256*256*4];
CGBitmapContext bitmapContext = new CGBitmapContext (bitmapData, 256, 256, 8, 256*4, CGColorSpace.CreateDeviceRGB (), CGImageAlphaInfo.PremultipliedLast);
//Console.WriteLine ("bitmap context size: {0} x {1}", bitmapContext.Width, bitmapContext.Height);
UIGraphics.PushContext (bitmapContext);
float grayLevel = str == " " ? .8f : 1;
bitmapContext.SetRGBFillColor (grayLevel, grayLevel, grayLevel, 1);
bitmapContext.FillRect (new RectangleF (0, 0, 256.0f, 256.0f));
bitmapContext.SetRGBFillColor (0, 0, 0, 1);
text.DrawString (new PointF ((256.0f - width) / 2.0f, (256.0f - height) / 2.0f + font.Descender), font);
UIGraphics.PopContext ();
return bitmapContext;
}