public override void Draw(RectangleF rect)
{
CGContext context = UIGraphics.GetCurrentContext();
switch (this.mask)
{
case SVProgressHUDMask.Black: {
UIColor.FromWhiteAlpha(0f, 0.5f).SetColor();
context.FillRect(this.Bounds);
break;
}
case SVProgressHUDMask.Gradient: {
float[] locations = new float[2] {
0.0f, 1.0f
};
float[] colors = new float[8] {
0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.75f
};
CGColorSpace colorSpace = CGColorSpace.CreateDeviceRGB();
CGGradient gradient = new CGGradient(colorSpace, colors, locations);
colorSpace.Dispose();
PointF center = new PointF(this.Bounds.Size.Width / 2f, this.Bounds.Size.Height / 2f);
float radius = Math.Min(this.Bounds.Size.Width, this.Bounds.Size.Height);
context.DrawRadialGradient(gradient, center, 0, center, radius, CGGradientDrawingOptions.DrawsAfterEndLocation);
gradient.Dispose();
break;
}
}
}
public static UIColor AverageColor(this UIImage image)
{
CGColorSpace colorSpace = CGColorSpace.CreateDeviceRGB();
byte[] rgba = new byte[4];
CGContext context = new CGBitmapContext(rgba, 1, 1, 8, 4, colorSpace, CGImageAlphaInfo.PremultipliedLast);
context.DrawImage(new CGRect(0, 0, 1, 1), image.CGImage);
colorSpace.Dispose();
colorSpace = null;
context.Dispose();
context = null;
if (rgba[3] > 0)
{
float alpha = ((float)rgba[3]) / 255.0f;
float multiplier = alpha / 255.0f;
UIColor color = new UIColor(((nfloat)rgba[0]) * multiplier, ((nfloat)rgba[1]) * multiplier, ((nfloat)rgba[2]) * multiplier, alpha);
return(color);
}
else
{
UIColor color = new UIColor(((nfloat)rgba[0]) * 255.0f, ((nfloat)rgba[1]) * 255.0f, ((nfloat)rgba[2]) * 255.0f, ((nfloat)rgba[3]) * 255.0f);
return(color);
}
}
static UIImage imageWithPDFPage(CGPDFPage page, float scale, CGAffineTransform t)
{
if (page == null)
{
return(null);
}
RectangleF box = page.GetBoxRect(CGPDFBox.Crop);
t.Scale(scale, scale);
box = new RectangleF(box.Location, new SizeF(box.Size.Width * scale, box.Size.Height * scale));
var pixelWidth = box.Size.Width;
CGColorSpace cs = CGColorSpace.CreateDeviceRGB();
//DebugAssert( cs ) ;
var _buffer = Marshal.AllocHGlobal((int)(box.Width * box.Height));
UIGraphics.BeginImageContext(box.Size);
CGContext c = UIGraphics.GetCurrentContext();
c.SaveState();
c.TranslateCTM(0f, box.Height);
c.ScaleCTM(1f, -1f);
cs.Dispose();
c.ConcatCTM(t);
c.DrawPDFPage(page);
c.RestoreState();
var image = UIGraphics.GetImageFromCurrentImageContext();
return(image);
}
void LoadBitmapData(int texId)
{
NSData texData = NSData.FromFile(NSBundle.MainBundle.PathForResource("texture1", "png"));
UIImage image = UIImage.LoadFromData(texData);
if (image == null)
{
return;
}
int width = image.CGImage.Width;
int height = image.CGImage.Height;
CGColorSpace colorSpace = CGColorSpace.CreateDeviceRGB();
byte[] imageData = new byte[height * width * 4];
CGContext context = new CGBitmapContext(imageData, width, height, 8, 4 * width, colorSpace,
CGBitmapFlags.PremultipliedLast | CGBitmapFlags.ByteOrder32Big);
context.TranslateCTM(0, height);
context.ScaleCTM(1, -1);
colorSpace.Dispose();
context.ClearRect(new RectangleF(0, 0, width, height));
context.DrawImage(new RectangleF(0, 0, width, height), image.CGImage);
GL.TexImage2D(TextureTarget.Texture2D, 0, PixelInternalFormat.Rgba, width, height, 0, PixelFormat.Rgba, PixelType.UnsignedByte, imageData);
context.Dispose();
}
public void Dispose()
{
if (cgdata != null)
{
cgdata.Dispose();
cgdata = null;
}
if (cgimage != null)
{
cgimage.Dispose();
cgimage = null;
}
if (image != null)
{
image.Dispose();
image = null;
}
if (colorSpace != null)
{
colorSpace.Dispose();
colorSpace = null;
}
//if (bits != IntPtr.Zero)
// Marshal.FreeHGlobal (bits);
bits = null;
}
/// <summary>
/// Returns the 2d alpha map of the image.
/// </summary>
/// <returns>The RGB as from image.</returns>
/// <param name="image">Image.</param>
/// <param name="x">The x coordinate.</param>
/// <param name="y">The y coordinate.</param>
/// <param name="count">Count.</param>
private static float[,] GetAlphasFromImage(UIImage image, int x, int y, int count)
{
nint bytesPerPixel = 4;
nint bitsPerComponent = 8;
CGImage imageRef = image.CGImage;
nint width = imageRef.Width;
nint height = imageRef.Height;
CGColorSpace colorSpace = CGColorSpace.CreateDeviceRGB();
byte[] rawData = new byte[height * width * bytesPerPixel];
nint bytesPerRow = bytesPerPixel * width;
CGContext context = new CGBitmapContext(rawData, width, height, bitsPerComponent, bytesPerRow, colorSpace, CGImageAlphaInfo.PremultipliedLast);
context.DrawImage(new CGRect(0, 0, width, height), imageRef);
colorSpace.Dispose();
context.Dispose();
float[,] ret = new float[width, height];
for (int h = 0; h < height; h++)
{
for (int w = 0; w < width; w++)
{
ret[w, h] = rawData[bytesPerRow * h + (w * bytesPerPixel) + 3] / 255.0f;
}
}
return(ret);
}
public static CGGradient CreateGradient(List <UIColor> colors, List <float> points)
{
List <nfloat> colorf = new List <nfloat>();
foreach (UIColor c in colors)
{
nfloat r, g, b, a;
c.GetRGBA(out r, out g, out b, out a);
colorf.Add(r);
colorf.Add(g);
colorf.Add(b);
colorf.Add(a);
}
nfloat [] components = colorf.ToArray();
nfloat[] locations = new nfloat[points.Count];
for (int i = 0; i < points.Count; i++)
{
locations[i] = points[i];
}
CGColorSpace space = CGColorSpace.CreateDeviceRGB();
CGGradient normalGradient = new CGGradient(space, components, locations);
space.Dispose();
return(normalGradient);
}
public static void TexImage2D(Stream data, out int width, out int height)
{
data.Position = 0;
var nsData = NSData.FromStream(data);
UIImage image = UIImage.LoadFromData(nsData);
if (image == null)
{
new Exception("could not load image data");
}
width = image.CGImage.Width;
height = image.CGImage.Height;
CGColorSpace colorSpace = CGColorSpace.CreateDeviceRGB();
byte [] imageData = new byte[height * width * 4];
CGContext context = new CGBitmapContext(imageData, width, height, 8, 4 * width, colorSpace,
CGBitmapFlags.PremultipliedLast | CGBitmapFlags.ByteOrder32Big);
colorSpace.Dispose();
context.ClearRect(new RectangleF(0, 0, width, height));
context.DrawImage(new RectangleF(0, 0, width, height), image.CGImage);
GL.TexImage2D(TextureTarget.Texture2D, 0, PixelInternalFormat.Rgba, width, height, 0, PixelFormat.Rgba, PixelType.UnsignedByte, imageData);
context.Dispose();
}
public static UIColor AverageColor(this UIImage image)
{
CGColorSpace colorSpace = CGColorSpace.CreateDeviceRGB();
// int bytesPerRow = (int)image.Size.Width * 4; // note that bytes per row should
// //be based on width, not height.
// byte[] ctxBuffer = new byte[bytesPerRow * (int)image.Size.Height];
// var previewContext =
// new CGBitmapContext(ctxBuffer, (int)image.Size.Width,
// (int)image.Size.Height, 8, bytesPerRow, colorSpace, CGImageAlphaInfo.Last);
byte[] rgba = new byte[4];
CGContext context = new CGBitmapContext(rgba, 1, 1, 8, 4, colorSpace, CGImageAlphaInfo.PremultipliedLast);
context.DrawImage(new CGRect(0, 0, 1, 1), image.CGImage);
// CGColorSpace.Release(colorSpace);
colorSpace.Dispose();
colorSpace = null;
context.Dispose();
context = null;
// CGContextRelease(context);
if (rgba[3] > 0)
{
float alpha = ((float)rgba[3]) / 255.0f;
float multiplier = alpha / 255.0f;
UIColor color = new UIColor(((nfloat)rgba[0]) * multiplier, ((nfloat)rgba[1]) * multiplier, ((nfloat)rgba[2]) * multiplier, alpha);
return(color);
}
else
{
UIColor color = new UIColor(((nfloat)rgba[0]) * 255.0f, ((nfloat)rgba[1]) * 255.0f, ((nfloat)rgba[2]) * 255.0f, ((nfloat)rgba[3]) * 255.0f);
return(color);
}
}
public static UIImage MakeRoundCornerImage(UIImage img, int cornerWidth, int cornerHeight)
{
UIImage newImage = null;
if (null != img)
{
var w = img.Size.Width;
var h = img.Size.Height;
CGColorSpace colorSpace = CGColorSpace.CreateDeviceRGB();
CGContext context = new CGBitmapContext(null, (int)w, (int)h, 8, (int)(4 * w), colorSpace, CGImageAlphaInfo.PremultipliedFirst);
context.BeginPath();
var rect = new RectangleF(0, 0, img.Size.Width, img.Size.Height);
AddRoundedRectToPath(context, rect, cornerWidth, cornerHeight);
context.ClosePath();
context.Clip();
var cgImage = img.CGImage;
context.DrawImage(new RectangleF(0, 0, w, h), cgImage);
cgImage.Dispose();
CGImage imageMasked = ((CGBitmapContext)context).ToImage();
context.Dispose();
colorSpace.Dispose();
newImage = new UIImage(imageMasked);
imageMasked.Dispose();
}
return(newImage);
}
public static CGColor CreateColor(int red, int green, int blue, int alpha)
{
CGColorSpace colorSpace = CGColorSpace.CreateDeviceRGB();
var color = new CGColor(colorSpace, new nfloat[] { red / 255f, green / 255f, blue / 255f, alpha / 255f });
colorSpace.Dispose();
return(color);
}
void CheckIndexedFile(CGImage img)
{
CGColorSpace cs = img.ColorSpace;
Assert.That(cs.Components, Is.EqualTo((nint)1), "Components");
Assert.That(cs.Model, Is.EqualTo(CGColorSpaceModel.Indexed), "GetBaseColorSpace");
var table = cs.GetColorTable();
Assert.That(table.Length, Is.EqualTo(768), "GetColorTable");
cs.Dispose();
}
private Texture(String filename)
{
#if __ANDROID__
AssetManager assets = GameActivity.Instance.Assets;
Bitmap bitmap = null;
using (Stream stream = assets.Open(filename))
{
bitmap = BitmapFactory.DecodeStream(stream);
Width = bitmap.Width;
Height = bitmap.Height;
}
GL.GenTextures(1, out _GLID);
GL.BindTexture(All.Texture2D, _GLID);
GL.TexParameter(All.Texture2D, All.TextureWrapS, (Int32)All.Repeat);
GL.TexParameter(All.Texture2D, All.TextureWrapT, (Int32)All.Repeat);
GL.TexParameter(All.Texture2D, All.TextureMinFilter, (Int32)All.Linear);
GL.TexParameter(All.Texture2D, All.TextureMagFilter, (Int32)All.Linear);
GLUtils.TexImage2D((Int32)All.Texture2D, 0, bitmap, 0);
GL.GenerateMipmap(All.Texture2D);
GL.BindTexture(All.Texture2D, 0);
bitmap.Recycle();
#elif __IOS__
UIImage image = UIImage.FromFile(filename);
nint cgWidth = image.CGImage.Width;
nint cgHeight = image.CGImage.Height;
Width = (Int32)cgWidth;
Height = (Int32)cgHeight;
CGColorSpace colorSpace = CGColorSpace.CreateDeviceRGB();
Byte[] data = new Byte[Width * Height * 4];
CGContext context = new CGBitmapContext(data, cgWidth, cgHeight, 8, 4 * Width, colorSpace, CGBitmapFlags.PremultipliedLast | CGBitmapFlags.ByteOrderDefault);
colorSpace.Dispose();
context.ClearRect(new CGRect(0, 0, cgWidth, cgHeight));
context.DrawImage(new CGRect(0, 0, cgWidth, cgHeight), image.CGImage);
GL.GenTextures(1, out _GLID);
GL.BindTexture(TextureTarget.Texture2D, _GLID);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapS, (Int32)All.Repeat);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapT, (Int32)All.Repeat);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (Int32)TextureMinFilter.LinearMipmapLinear);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (Int32)TextureMagFilter.Linear);
GL.TexImage2D(TextureTarget.Texture2D, 0, PixelInternalFormat.Rgba, Width, Height, 0, PixelFormat.Rgba, PixelType.UnsignedByte, data);
context.Dispose();
GL.GenerateMipmap(TextureTarget.Texture2D);
GL.BindTexture(TextureTarget.Texture2D, 0);
#endif
LoadedTextures.Add(filename, this);
_Filename = filename;
}
public UIImage ProcessedImage()
{
nfloat scale = UIScreen.MainScreen.Scale;
CGImage imageRef = _originalImage.CGImage;
if (imageRef == null)
{
return(null);
}
var bytesPerRow = 0;
var bitsPerComponent = imageRef.BitsPerComponent;
CGColorSpace colorSpace = CGColorSpace.CreateDeviceRGB();
var bitmapInfo = imageRef.BitmapInfo;
CGBitmapContext context = new CGBitmapContext(null,
(nint)(_targetSize.Width * scale),
(nint)(_targetSize.Height * scale),
bitsPerComponent,
bytesPerRow,
colorSpace,
bitmapInfo);
colorSpace.Dispose();
if (context == null)
{
imageRef.Dispose();
return(null);
}
CGRect targetFrame = LocalCropFrame();
context.InterpolationQuality = CGInterpolationQuality.High;
context.SetBlendMode(CGBlendMode.Copy);
context.DrawImage(targetFrame, imageRef);
var contextImage = context.ToImage();
UIImage finalImage = null;
context.Dispose();
if (contextImage != null)
{
finalImage = UIImage.FromImage(contextImage, scale, UIImageOrientation.Up);
contextImage.Dispose();
}
imageRef.Dispose();
return(finalImage);
}
public static CGGradient CreateNormalGradient(nfloat r1, nfloat g1, nfloat b1, nfloat a1,
nfloat r2, nfloat g2, nfloat b2, nfloat a2)
{
nfloat [] components = new nfloat[] { r1, g1, b1, a1, r2, g2, b2, a2 };
nfloat [] locations = new nfloat[] { 0f, 1f };
CGColorSpace space = CGColorSpace.CreateDeviceRGB();
CGGradient normalGradient = new CGGradient(space, components, locations);
space.Dispose();
return(normalGradient);
}
public GLTexture(string inFilename)
{
GL.Enable(EnableCap.Texture2D);
GL.Enable(EnableCap.Blend);
filename = inFilename;
GL.Hint(HintTarget.GenerateMipmapHint, HintMode.Nicest);
GL.GenTextures(1, out texture);
GL.BindTexture(TextureTarget.Texture2D, texture);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapS, (int)All.Repeat);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapT, (int)All.Repeat);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)All.Linear);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)All.Linear);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)All.Nearest);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)All.Nearest);
//TODO Remove the Substring method if you don't support iOS versions prior to iOS 6.
string extension = Path.GetExtension(filename).Substring(1);
string baseFilename = Path.GetFileNameWithoutExtension(filename);
string path = NSBundle.MainBundle.PathForResource(baseFilename, extension);
NSData texData = NSData.FromFile(path);
UIImage image = UIImage.LoadFromData(texData);
if (image == null)
{
return;
}
nint width = image.CGImage.Width;
nint height = image.CGImage.Height;
CGColorSpace colorSpace = CGColorSpace.CreateDeviceRGB();
byte [] imageData = new byte[height * width * 4];
CGContext context = new CGBitmapContext(imageData, width, height, 8, 4 * width, colorSpace,
CGBitmapFlags.PremultipliedLast | CGBitmapFlags.ByteOrder32Big);
context.TranslateCTM(0, height);
context.ScaleCTM(1, -1);
colorSpace.Dispose();
context.ClearRect(new CGRect(0, 0, width, height));
context.DrawImage(new CGRect(0, 0, width, height), image.CGImage);
GL.TexImage2D(TextureTarget.Texture2D, 0, PixelInternalFormat.Rgba, (int)width, (int)height, 0, PixelFormat.Rgba, PixelType.UnsignedByte, imageData);
context.Dispose();
}
private UIImage gradientImageWithSize(SizeF size, float[] locations, float[] components, int count)
{
UIGraphics.BeginImageContextWithOptions(size, false, 0);
CGContext context = UIGraphics.GetCurrentContext();
CGColorSpace colorSpace = CGColorSpace.CreateDeviceRGB();
CGGradient colorGradient = new CGGradient(colorSpace, components, locations);
colorSpace.Dispose();
context.DrawLinearGradient(colorGradient, new PointF(0, 0), new PointF(size.Width, 0), 0);
colorGradient.Dispose();
UIImage image = UIGraphics.GetImageFromCurrentImageContext();
UIGraphics.EndImageContext();
return(image);
}
public override void Draw(RectangleF rect)
{
base.Draw(rect);
CGContext context = UIGraphics.GetCurrentContext();
CGColorSpace colorSpace = CGColorSpace.CreateDeviceRGB();
float step = 0.166666666666667f;
float[] locations = new float[] {
0.00f,
step,
step *2,
step *3,
step *4,
step *5,
1.0f
};
CGColor c1 = new CGColor(1, 0, 1, 1);
CGColor c2 = new CGColor(1, 1, 0, 1);
CGColor c3 = new CGColor(0, 1, 1, 1);
CGColor[] colors = new CGColor[] {
UIColor.Red.CGColor,
c1,
UIColor.Blue.CGColor,
c3,
UIColor.Green.CGColor,
c2,
UIColor.Red.CGColor
};
CGGradient gradiend = new CGGradient(colorSpace, colors, locations);
context.DrawLinearGradient(gradiend, new PointF(rect.Size.Width, 0), new PointF(0, 0), CGGradientDrawingOptions.DrawsBeforeStartLocation);
gradiend.Dispose();
colorSpace.Dispose();
} // draw
public void SetOriginalImage(UIImage originalImage, CGRect cropFrame)
{
LoadIndicator.StartAnimating();
InvokeOnMainThread(() =>
{
CGImage imageRef = originalImage.CGImage;
UIImageOrientation imageOrientation = originalImage.Orientation;
if (imageRef == null)
{
return;
}
var bytesPerRow = 0;
var width = imageRef.Width;
var height = imageRef.Height;
var bitsPerComponent = imageRef.BitsPerComponent;
CGColorSpace colorSpace = CGColorSpace.CreateDeviceRGB();
CGBitmapFlags bitmapInfo = imageRef.BitmapInfo;
switch (imageOrientation)
{
case UIImageOrientation.RightMirrored:
case UIImageOrientation.LeftMirrored:
case UIImageOrientation.Right:
case UIImageOrientation.Left:
width = imageRef.Height;
height = imageRef.Width;
break;
default:
break;
}
CGSize imageSize = new CGSize(width, height);
CGBitmapContext context = new CGBitmapContext(null,
width,
height,
bitsPerComponent,
bytesPerRow,
colorSpace,
bitmapInfo);
colorSpace.Dispose();
if (context == null)
{
imageRef.Dispose();
return;
}
switch (imageOrientation)
{
case UIImageOrientation.RightMirrored:
case UIImageOrientation.Right:
context.TranslateCTM(imageSize.Width / 2, imageSize.Height / 2);
context.RotateCTM(-((nfloat)Math.PI / 2));
context.TranslateCTM(-imageSize.Height / 2, -imageSize.Width / 2);
break;
case UIImageOrientation.LeftMirrored:
case UIImageOrientation.Left:
context.TranslateCTM(imageSize.Width / 2, imageSize.Height / 2);
context.RotateCTM((nfloat)(Math.PI / 2));
context.TranslateCTM(-imageSize.Height / 2, -imageSize.Width / 2);
break;
case UIImageOrientation.Down:
case UIImageOrientation.DownMirrored:
context.TranslateCTM(imageSize.Width / 2, imageSize.Height / 2);
context.RotateCTM((nfloat)Math.PI);
context.TranslateCTM(-imageSize.Width / 2, -imageSize.Height / 2);
break;
default:
break;
}
context.InterpolationQuality = CGInterpolationQuality.High;
context.SetBlendMode(CGBlendMode.Copy);
context.DrawImage(new CGRect(0, 0, imageRef.Width, imageRef.Height), imageRef);
CGImage contextImage = context.ToImage();
context.Dispose();
if (contextImage != null)
{
_originalImage = UIImage.FromImage(contextImage, originalImage.CurrentScale, UIImageOrientation.Up);
contextImage.Dispose();
}
imageRef.Dispose();
BeginInvokeOnMainThread(() =>
{
CGSize convertedImageSize = new CGSize(_originalImage.Size.Width / _cropSizeRatio,
_originalImage.Size.Height / _cropSizeRatio);
ImageView.Alpha = 0;
ImageView.Image = _originalImage;
CGSize sampleImageSize = new CGSize(Math.Max(convertedImageSize.Width, ScrollView.Frame.Size.Width),
Math.Max(convertedImageSize.Height, ScrollView.Frame.Size.Height));
ScrollView.MinimumZoomScale = 1;
ScrollView.MaximumZoomScale = 1;
ScrollView.ZoomScale = 1;
ImageView.Frame = new CGRect(0, 0, convertedImageSize.Width, convertedImageSize.Height);
nfloat zoomScale = 1;
if (convertedImageSize.Width < convertedImageSize.Height)
{
zoomScale = (ScrollView.Frame.Size.Width / convertedImageSize.Width);
}
else
{
zoomScale = (ScrollView.Frame.Size.Height / convertedImageSize.Height);
}
ScrollView.ContentSize = sampleImageSize;
if (zoomScale < 1)
{
ScrollView.MinimumZoomScale = zoomScale;
ScrollView.MaximumZoomScale = 1;
ScrollView.ZoomScale = zoomScale;
}
else
{
ScrollView.MinimumZoomScale = zoomScale;
ScrollView.MaximumZoomScale = zoomScale;
ScrollView.ZoomScale = zoomScale;
}
ScrollView.ContentInset = UIEdgeInsets.Zero;
ScrollView.ContentOffset = new CGPoint((ImageView.Frame.Size.Width - ScrollView.Frame.Size.Width) / 2, (ImageView.Frame.Size.Height - ScrollView.Frame.Size.Height) / 2);
if (cropFrame.Size.Width > 0 && cropFrame.Size.Height > 0)
{
nfloat scale = UIScreen.MainScreen.Scale;
nfloat newZoomScale = (_targetSize.Width * scale) / cropFrame.Size.Width;
ScrollView.ZoomScale = newZoomScale;
nfloat heightAdjustment = (_targetSize.Height / _cropSizeRatio) - ScrollView.ContentSize.Height;
nfloat offsetY = cropFrame.Y + (heightAdjustment * _cropSizeRatio * scale);
ScrollView.ContentOffset = new CGPoint(cropFrame.X / scale / _cropSizeRatio,
(offsetY / scale / _cropSizeRatio) - heightAdjustment);
}
ScrollView.SetNeedsLayout();
UIView.Animate(0.3,
() =>
{
LoadIndicator.Alpha = 0;
ImageView.Alpha = 1;
}, () =>
{
LoadIndicator.StopAnimating();
});
});
});
}
public void Dispose()
{
_context.Dispose();
_colorSpace.Dispose();
_handle.Free();
}
public override void Draw(RectangleF rectB)
{
CGColorSpace cs = null;
CGContext ctx = null;
RectangleF bds;
ctx = UIGraphics.GetCurrentContext();
cs = CGColorSpace.CreateDeviceRGB();
if (Vertical)
{
ctx.TranslateCTM(0, Bounds.Height);
ctx.ScaleCTM(1, -1);
bds = Bounds;
}
else
{
ctx.TranslateCTM(0, Bounds.Height);
ctx.RotateCTM(-(float)Math.PI / 2);
bds = new RectangleF(0, 0, Bounds.Height, Bounds.Width);
}
ctx.SetFillColorSpace(cs);
ctx.SetStrokeColorSpace(cs);
if (NumLights == 0)
{
float currentTop = 0;
if (BgColor != null)
{
BgColor.SetColor();
ctx.FillRect(bds);
}
foreach (var thisTresh in ColorThresholds)
{
var val = Math.Min(thisTresh.MaxValue, Level);
var rect = new RectangleF(0, bds.Height * currentTop, bds.Width, bds.Height * (val - currentTop));
thisTresh.Color.SetColor();
ctx.FillRect(rect);
if (Level < thisTresh.MaxValue)
{
break;
}
currentTop = val;
}
if (BorderColor != null)
{
BorderColor.SetColor();
bds.Inflate(-0.5f, -0.5f);
ctx.StrokeRect(bds);
}
}
else
{
float lightMinVal = 0;
float insetAmount, lightVSpace;
int peakLight = -1;
lightVSpace = bds.Height / (float)NumLights;
if (lightVSpace < 4)
{
insetAmount = 0;
}
else if (lightVSpace < 8)
{
insetAmount = 0.5f;
}
else
{
insetAmount = 1;
}
if (PeakLevel > 0)
{
peakLight = (int)PeakLevel * NumLights;
if (peakLight >= NumLights)
{
peakLight = NumLights - 1;
}
}
for (int light_i = 0; light_i < NumLights; light_i++)
{
float lightMaxVal = (light_i + 1) / (float)NumLights;
float lightIntensity;
RectangleF lightRect;
UIColor lightColor;
if (light_i == peakLight)
{
lightIntensity = 1;
}
else
{
lightIntensity = (Level - lightMinVal) / (lightMaxVal - lightMinVal);
lightIntensity = Clamp(0, lightIntensity, 1);
if (!VariableLightIntensity && lightIntensity > 0)
{
lightIntensity = 1;
}
}
lightColor = ColorThresholds [0].Color;
int color_i = 0;
for (; color_i < ColorThresholds.Length - 1; color_i++)
{
var thisTresh = ColorThresholds [color_i];
var nextTresh = ColorThresholds [color_i + 1];
if (thisTresh.MaxValue <= lightMaxVal)
{
//Console.WriteLine ("PICKED COLOR at {0}", color_i);
lightColor = nextTresh.Color;
}
}
lightRect = new RectangleF(0, bds.Height * light_i / (float)NumLights,
bds.Width, bds.Height * (1f / NumLights));
lightRect.Inset(insetAmount, insetAmount);
if (BgColor != null)
{
BgColor.SetColor();
ctx.FillRect(lightRect);
}
//Console.WriteLine ("Got: {0} {1}", lightColor, UIColor.Red);
//lightColor = UIColor.Red;
if (lightIntensity == 1)
{
lightColor.SetColor();
//Console.WriteLine ("Setting color to {0}", lightColor);
ctx.FillRect(lightRect);
}
else if (lightIntensity > 0)
{
using (var clr = new CGColor(lightColor.CGColor, lightIntensity)){
ctx.SetFillColorWithColor(clr);
ctx.FillRect(lightRect);
}
}
if (BorderColor != null)
{
BorderColor.SetColor();
lightRect.Inset(0.5f, 0.5f);
ctx.StrokeRect(lightRect);
}
lightMinVal = lightMaxVal;
}
}
cs.Dispose();
}
// see http://deathbyalgorithm.blogspot.fr/2013/05/opentk-textures.html
public static int LoadTexture(string name, int quality, bool repeat, bool flip_y)
{
string prefix;
#if __IOS__
prefix = "OpenGLDemo.iOS.";
#endif
#if __ANDROID__
prefix = "OpenGLDemo.Droid.";
#endif
var assembly = typeof(App2).GetTypeInfo().Assembly;
// foreach (var res in assembly.GetManifestResourceNames())
// System.Diagnostics.Debug.WriteLine("found resource: " + res);
Stream stream = assembly.GetManifestResourceStream(prefix + name + ".png");
byte[] imageData;
using (MemoryStream ms = new MemoryStream())
{
stream.CopyTo(ms);
imageData = ms.ToArray();
}
#if __ANDROID__
Bitmap b = BitmapFactory.DecodeByteArray(imageData, 0, imageData.Length);
#elif __IOS__
UIImage image = ImageFromByteArray(imageData);
int width = (int)image.CGImage.Width;
int height = (int)image.CGImage.Height;
CGColorSpace colorSpace = CGColorSpace.CreateDeviceRGB();
byte[] imageData2 = new byte[height * width * 4];
CGContext context = new CGBitmapContext(imageData2, width, height, 8, 4 * width, colorSpace,
CGBitmapFlags.PremultipliedLast | CGBitmapFlags.ByteOrder32Big);
colorSpace.Dispose();
context.ClearRect(new RectangleF(0, 0, width, height));
context.DrawImage(new RectangleF(0, 0, width, height), image.CGImage);
#endif
int [] textures = new int[1];
//Generate a new texture target in gl
GL.GenTextures(1, textures);
//Will bind the texture newly/empty created with GL.GenTexture
//All gl texture methods targeting Texture2D will relate to this texture
GL.BindTexture(TextureTarget.Texture2D, textures[0]);
//The reason why your texture will show up glColor without setting these parameters is actually
//TextureMinFilters fault as its default is NearestMipmapLinear but we have not established mipmapping
//We are only using one texture at the moment since mipmapping is a collection of textures pre filtered
//I'm assuming it stops after not having a collection to check.
switch (quality)
{
case 1: //High quality
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)All.Linear);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)All.Linear);
break;
//case 0:
default: //Low quality
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)All.Nearest);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)All.Nearest);
break;
}
if (repeat)
{
//This will repeat the texture past its bounds set by TexImage2D
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapS, (int)All.Repeat);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapT, (int)All.Repeat);
}
else
{
//This will clamp the texture to the edge, so manipulation will result in skewing
//It can also be useful for getting rid of repeating texture bits at the borders
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapS, (int)All.ClampToEdge);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapT, (int)All.ClampToEdge);
}
#if __ANDROID__
GLUtils.TexImage2D((int)All.Texture2D, 0, b, 0);
b.Recycle();
#elif __IOS__
GL.TexImage2D(TextureTarget.Texture2D, 0, PixelInternalFormat.Rgba, width, height, 0, PixelFormat.Rgba, PixelType.UnsignedByte, imageData2);
#endif
GL.BindTexture(TextureTarget.Texture2D, 0);
return(textures[0]);
}
