protected override void init(Stream stream, bool flip, Loader.LoadedCallbackMethod loadedCallback)
{
try
{
using (var image = NSImage.FromStream(stream))
{
var rep = image.Representations()[0];
int width = rep.PixelsWide;
int height = rep.PixelsHigh;
Mipmaps = new Mipmap[1];
Size = new Size2(width, height);
var data = new byte[width * height * 4];
var emptyRect = RectangleF.Empty;
using (CGContext imageContext = new CGBitmapContext(data, width, height, 8, width*4, CGColorSpace.CreateDeviceRGB(), CGImageAlphaInfo.PremultipliedLast))
using (var cgImage = image.AsCGImage(ref emptyRect, null, null))
{
imageContext.DrawImage(new RectangleF(0, 0, width, height), cgImage);
Mipmaps[0] = new Mipmap(data, width, height, 1, 4);
if (flip) Mipmaps[0].FlipVertical();
}
}
}
catch (Exception e)
{
FailedToLoad = true;
Loader.AddLoadableException(e);
if (loadedCallback != null) loadedCallback(this, false);
return;
}
Loaded = true;
if (loadedCallback != null) loadedCallback(this, true);
}
void GetImagaDataFromPath (string path)
{
NSImage src;
CGImage image;
CGContext context = null;
src = new NSImage (path);
var rect = RectangleF.Empty;
image = src.AsCGImage (ref rect, null, null);
width = image.Width;
height = image.Height;
data = new byte[width * height * 4];
CGImageAlphaInfo ai = CGImageAlphaInfo.PremultipliedLast;
context = new CGBitmapContext (data, width, height, 8, 4 * width, image.ColorSpace, ai);
// Core Graphics referential is upside-down compared to OpenGL referential
// Flip the Core Graphics context here
// An alternative is to use flipped OpenGL texture coordinates when drawing textures
context.TranslateCTM (0, height);
context.ScaleCTM (1, -1);
// Set the blend mode to copy before drawing since the previous contents of memory aren't used.
// This avoids unnecessary blending.
context.SetBlendMode (CGBlendMode.Copy);
context.DrawImage (new RectangleF (0, 0, width, height), image);
}
// Used for debuggin purposes
internal static void SaveToFile (string fileName, CGBitmapContext bitmap)
{
if (bitmap == null)
throw new ObjectDisposedException ("cgimage");
// With MonoTouch we can use UTType from CoreMobileServices but since
// MonoMac does not have that yet (or at least can not find it) I will
// use the string version of those for now. I did not want to add another
// #if #else in here.
// for now we will just default this to png
var typeIdentifier = "public.png";
// * NOTE * we only support one image for right now.
//NSMutableData imgData = new NSMutableData();
NSUrl url = NSUrl.FromFilename (fileName);
// Create an image destination that saves into the imgData
CGImageDestination dest = CGImageDestination.Create (url, typeIdentifier, 1);
// Add an image to the destination
dest.AddImage(bitmap.GetImage(), (NSDictionary)null);
// Finish the export
bool success = dest.Close ();
// if (success == false)
// Console.WriteLine("did not work");
// else
// Console.WriteLine("did work: " + path);
dest.Dispose();
dest = null;
}
public override object CreateImageBuilder (int width, int height, ImageFormat format)
{
var flags = CGBitmapFlags.ByteOrderDefault;
int bytesPerRow;
switch (format) {
case ImageFormat.ARGB32:
bytesPerRow = width * 4;
flags |= CGBitmapFlags.PremultipliedFirst;
break;
case ImageFormat.RGB24:
bytesPerRow = width * 3;
flags |= CGBitmapFlags.None;
break;
default:
throw new NotImplementedException ("ImageFormat: " + format.ToString ());
}
var bmp = new CGBitmapContext (IntPtr.Zero, width, height, 8, bytesPerRow, Util.DeviceRGBColorSpace, flags);
bmp.TranslateCTM (0, height);
bmp.ScaleCTM (1, -1);
return new CGContextBackend {
Context = bmp,
Size = new CGSize (width, height),
InverseViewTransform = bmp.GetCTM ().Invert ()
};
}
private void CreateBitmap(int width, int height)
{
// if (_bitmap == null || (_bitmap.Width < width || _bitmap.Height < height))
// {
_bitmap = CCLabelUtilities.CreateBitmap (width, height);
//}
//if (_brush == null)
//{
_brush = new CCColor4B(Microsoft.Xna.Framework.Color.White);
//}
}
private void CreateBitmap(int width, int height)
{
// if (_bitmap == null || (_bitmap.Width < width || _bitmap.Height < height))
// {
_bitmap = CCLabelUtilities.CreateBitmap (width, height);
//}
//if (_brush == null)
//{
_brush = CCColor4B.White;
//}
}
public override object ConvertToBitmap(object handle, double width, double height, double scaleFactor, ImageFormat format)
{
int pixelWidth = (int)(width * scaleFactor);
int pixelHeight = (int)(height * scaleFactor);
if (handle is CustomImage) {
var flags = CGBitmapFlags.ByteOrderDefault;
int bytesPerRow;
switch (format) {
case ImageFormat.ARGB32:
bytesPerRow = pixelWidth * 4;
flags |= CGBitmapFlags.PremultipliedFirst;
break;
case ImageFormat.RGB24:
bytesPerRow = pixelWidth * 3;
flags |= CGBitmapFlags.None;
break;
default:
throw new NotImplementedException ("ImageFormat: " + format.ToString ());
}
var bmp = new CGBitmapContext (IntPtr.Zero, pixelWidth, pixelHeight, 8, bytesPerRow, Util.DeviceRGBColorSpace, flags);
bmp.TranslateCTM (0, pixelHeight);
bmp.ScaleCTM ((float)scaleFactor, (float)-scaleFactor);
var ctx = new CGContextBackend {
Context = bmp,
Size = new SizeF ((float)width, (float)height),
InverseViewTransform = bmp.GetCTM ().Invert (),
ScaleFactor = scaleFactor
};
var ci = (CustomImage)handle;
ci.DrawInContext (ctx);
var img = new NSImage (((CGBitmapContext)bmp).ToImage (), new SizeF (pixelWidth, pixelHeight));
var imageData = img.AsTiff ();
var imageRep = (NSBitmapImageRep)NSBitmapImageRep.ImageRepFromData (imageData);
var im = new NSImage ();
im.AddRepresentation (imageRep);
im.Size = new SizeF ((float)width, (float)height);
bmp.Dispose ();
return im;
}
else {
NSImage img = (NSImage)handle;
NSBitmapImageRep bitmap = img.Representations ().OfType<NSBitmapImageRep> ().FirstOrDefault ();
if (bitmap == null) {
var imageData = img.AsTiff ();
var imageRep = (NSBitmapImageRep)NSBitmapImageRep.ImageRepFromData (imageData);
var im = new NSImage ();
im.AddRepresentation (imageRep);
im.Size = new SizeF ((float)width, (float)height);
return im;
}
return handle;
}
}
internal static CGBitmapContext CreateBitmap (int width, int height) //, PixelFormat format)
{
int bitsPerComponent, bytesPerRow;
CGColorSpace colorSpace;
CGBitmapFlags bitmapInfo;
// bool premultiplied = false;
int bitsPerPixel = 0;
// Don't forget to set the Image width and height for size.
imageSize.Width = width;
imageSize.Height = height;
colorSpace = CGColorSpace.CreateDeviceRGB ();
bitsPerComponent = 8;
bitsPerPixel = 32;
bitmapInfo = CGBitmapFlags.PremultipliedLast;
bytesPerRow = width * bitsPerPixel/bitsPerComponent;
int size = bytesPerRow * height;
bitmapBlock = Marshal.AllocHGlobal (size);
var bitmapContext = new CGBitmapContext (bitmapBlock,
width, height,
bitsPerComponent,
bytesPerRow,
colorSpace,
bitmapInfo);
// This works for now but we need to look into initializing the memory area itself
bitmapContext.ClearRect (new CGRect (0,0,width,height));
return bitmapContext;
}
internal static void NativeDrawString (CGBitmapContext bitmapContext, string s, CTFont font, CCColor4B brush, CGRect layoutRectangle)
{
if (font == null)
throw new ArgumentNullException ("font");
if (s == null || s.Length == 0)
return;
bitmapContext.ConcatCTM (bitmapContext.GetCTM().Invert());
// This is not needed here since the color is set in the attributed string.
//bitmapContext.SetFillColor(brush.R/255f, brush.G/255f, brush.B/255f, brush.A/255f);
// I think we only Fill the text with no Stroke surrounding
//bitmapContext.SetTextDrawingMode(CGTextDrawingMode.Fill);
var attributedString = buildAttributedString(s, font, brush);
// Work out the geometry
CGRect insetBounds = layoutRectangle;
CGPoint textPosition = new CGPoint(insetBounds.X,
insetBounds.Y);
float boundsWidth = (float)insetBounds.Width;
// Calculate the lines
nint start = 0;
nint length = attributedString.Length;
var typesetter = new CTTypesetter(attributedString);
float baselineOffset = 0;
// First we need to calculate the offset for Vertical Alignment if we
// are using anything but Top
if (vertical != CCVerticalTextAlignment.Top) {
while (start < length) {
nint count = typesetter.SuggestLineBreak((int)start, (double)boundsWidth);
var line = typesetter.GetLine (new NSRange(start, count));
// Create and initialize some values from the bounds.
nfloat ascent;
nfloat descent;
nfloat leading;
line.GetTypographicBounds(out ascent, out descent, out leading);
baselineOffset += (float)Math.Ceiling ((float)(ascent + descent + leading + 1)); // +1 matches best to CTFramesetter's behavior
line.Dispose ();
start += count;
}
}
start = 0;
while (start < length && textPosition.Y < insetBounds.Bottom)
{
// Now we ask the typesetter to break off a line for us.
// This also will take into account line feeds embedded in the text.
// Example: "This is text \n with a line feed embedded inside it"
nint count = typesetter.SuggestLineBreak((int)start, (double)boundsWidth);
var line = typesetter.GetLine(new NSRange(start, count));
// Create and initialize some values from the bounds.
nfloat ascent;
nfloat descent;
nfloat leading;
line.GetTypographicBounds(out ascent, out descent, out leading);
// Calculate the string format if need be
var penFlushness = 0.0f;
if (horizontal == CCTextAlignment.Right)
penFlushness = (float)line.GetPenOffsetForFlush(1.0f, boundsWidth);
else if (horizontal == CCTextAlignment.Center)
penFlushness = (float)line.GetPenOffsetForFlush(0.5f, boundsWidth);
// initialize our Text Matrix or we could get trash in here
var textMatrix = CGAffineTransform.MakeIdentity();
if (vertical == CCVerticalTextAlignment.Top)
textMatrix.Translate(penFlushness, insetBounds.Height - textPosition.Y -(float)Math.Floor(ascent - 1));
if (vertical == CCVerticalTextAlignment.Center)
textMatrix.Translate(penFlushness, ((insetBounds.Height / 2) + (baselineOffset / 2)) - textPosition.Y -(float)Math.Floor(ascent - 1));
if (vertical == CCVerticalTextAlignment.Bottom)
textMatrix.Translate(penFlushness, baselineOffset - textPosition.Y -(float)Math.Floor(ascent - 1));
// Set our matrix
bitmapContext.TextMatrix = textMatrix;
// and draw the line
line.Draw(bitmapContext);
// Move the index beyond the line break.
start += count;
textPosition.Y += (float)Math.Ceiling(ascent + descent + leading + 1); // +1 matches best to CTFramesetter's behavior
line.Dispose();
}
}
private void InitWithCGImage (CGImage image, All filter)
{
int width, height, i;
CGContext context = null;
IntPtr data;
CGColorSpace colorSpace;
IntPtr tempData;
bool hasAlpha;
CGImageAlphaInfo info;
CGAffineTransform transform;
Size imageSize;
SurfaceFormat pixelFormat;
bool sizeToFit = false;
if (image == null) {
throw new ArgumentException (" NSImage is invalid! " );
}
info = image.AlphaInfo;
hasAlpha = ((info == CGImageAlphaInfo.PremultipliedLast) || (info == CGImageAlphaInfo.PremultipliedFirst) || (info == CGImageAlphaInfo.Last) || (info == CGImageAlphaInfo.First) ? true : false);
if (image.ColorSpace != null) {
if (hasAlpha) {
pixelFormat = SurfaceFormat.Rgba32;
} else {
pixelFormat = SurfaceFormat.Rgb32;
}
} else {
pixelFormat = SurfaceFormat.Alpha8;
}
imageSize = new Size (image.Width,image.Height);
transform = CGAffineTransform.MakeIdentity ();
width = imageSize.Width;
if ((width != 1) && ((width & (width - 1)) != 0)) {
i = 1;
while ((sizeToFit ? 2 * i : i) < width)
i *= 2;
width = i;
}
height = imageSize.Height;
if ((height != 1) && ((height & (height - 1)) != 0)) {
i = 1;
while ((sizeToFit ? 2 * i : i) < height)
i *= 2;
height = i;
}
// TODO: kMaxTextureSize = 1024
while ((width > 1024) || (height > 1024)) {
width /= 2;
height /= 2;
transform = CGAffineTransform.MakeScale (0.5f, 0.5f);
imageSize.Width /= 2;
imageSize.Height /= 2;
}
switch (pixelFormat) {
case SurfaceFormat.Rgba32:
colorSpace = CGColorSpace.CreateDeviceRGB ();
data = Marshal.AllocHGlobal (height * width * 4);
context = new CGBitmapContext (data, width, height, 8, 4 * width, colorSpace,CGImageAlphaInfo.PremultipliedLast);
colorSpace.Dispose ();
break;
case SurfaceFormat.Rgb32:
colorSpace = CGColorSpace.CreateDeviceRGB ();
data = Marshal.AllocHGlobal (height * width * 4);
context = new CGBitmapContext (data, width, height, 8, 4 * width, colorSpace, CGImageAlphaInfo.NoneSkipLast);
colorSpace.Dispose ();
break;
case SurfaceFormat.Alpha8:
data = Marshal.AllocHGlobal (height * width);
context = new CGBitmapContext (data, width, height, 8, width, null, CGImageAlphaInfo.Only);
break;
default:
throw new NotSupportedException ("Invalid pixel format");
}
context.ClearRect (new RectangleF (0,0,width,height));
context.TranslateCTM (0, height - imageSize.Height);
if (!transform.IsIdentity) {
context.ConcatCTM (transform);
}
context.DrawImage (new RectangleF (0, 0, image.Width, image.Height), image);
//Convert "RRRRRRRRRGGGGGGGGBBBBBBBBAAAAAAAA" to "RRRRRGGGGGGBBBBB"
if (pixelFormat == SurfaceFormat.Rgb32) {
tempData = Marshal.AllocHGlobal (height * width * 2);
int d32;
short d16;
int inPixel32Count = 0, outPixel16Count=0;
for (i = 0; i < width * height; ++i, inPixel32Count+=sizeof(int)) {
d32 = Marshal.ReadInt32 (data, inPixel32Count);
short R = (short)((((d32 >> 0) & 0xFF) >> 3) << 11);
short G = (short)((((d32 >> 8) & 0xFF) >> 2) << 5);
short B = (short)((((d32 >> 16) & 0xFF) >> 3) << 0);
d16 = (short)(R | G | B);
Marshal.WriteInt16 (tempData, outPixel16Count, d16);
outPixel16Count += sizeof(short);
}
Marshal.FreeHGlobal (data);
data = tempData;
}
InitWithData (data, pixelFormat, width, height, imageSize, filter);
context.Dispose ();
Marshal.FreeHGlobal (data);
}
public override object ConvertToBitmap(object handle, int pixelWidth, int pixelHeight, ImageFormat format)
{
if (handle is CustomImage) {
var flags = CGBitmapFlags.ByteOrderDefault;
int bytesPerRow;
switch (format) {
case ImageFormat.ARGB32:
bytesPerRow = pixelWidth * 4;
flags |= CGBitmapFlags.PremultipliedFirst;
break;
case ImageFormat.RGB24:
bytesPerRow = pixelWidth * 3;
flags |= CGBitmapFlags.None;
break;
default:
throw new NotImplementedException ("ImageFormat: " + format.ToString ());
}
var bmp = new CGBitmapContext (IntPtr.Zero, pixelWidth, pixelHeight, 8, bytesPerRow, Util.DeviceRGBColorSpace, flags);
bmp.TranslateCTM (0, pixelHeight);
bmp.ScaleCTM (1, -1);
var ctx = new CGContextBackend {
Context = bmp,
Size = new SizeF (pixelWidth, pixelHeight),
InverseViewTransform = bmp.GetCTM ().Invert ()
};
var ci = (CustomImage)handle;
ci.DrawInContext (ctx);
var img = new NSImage (((CGBitmapContext)bmp).ToImage (), new SizeF (pixelWidth, pixelHeight));
var imageData = img.AsTiff ();
var imageRep = (NSBitmapImageRep) NSBitmapImageRep.ImageRepFromData (imageData);
var im = new NSImage ();
im.AddRepresentation (imageRep);
return im;
}
else
return handle;
}
private void InitWithCGImage(CGImage image, All filter)
{
int width, height, i;
CGContext context = null;
IntPtr data;
CGColorSpace colorSpace;
IntPtr tempData;
bool hasAlpha;
CGImageAlphaInfo info;
CGAffineTransform transform;
Size imageSize;
SurfaceFormat pixelFormat;
//bool sizeToFit = false;
if (image == null) {
throw new ArgumentException (" NSImage is invalid! " );
}
info = image.AlphaInfo;
hasAlpha = ((info == CGImageAlphaInfo.PremultipliedLast) || (info == CGImageAlphaInfo.PremultipliedFirst) || (info == CGImageAlphaInfo.Last) || (info == CGImageAlphaInfo.First) ? true : false);
if (image.ColorSpace != null) {
if (hasAlpha) {
pixelFormat = SurfaceFormat.Color;
} else {
pixelFormat = SurfaceFormat.Color;
}
} else {
pixelFormat = SurfaceFormat.Alpha8;
}
imageSize = new Size (image.Width,image.Height);
transform = CGAffineTransform.MakeIdentity ();
width = imageSize.Width;
// Take out the width and height adjustments for power of 2
// If not then GetData and SetData is messed up.
// The Mac opengl version supports non power of 2 textures
// so we do not have to make them so
// if ((width != 1) && ((width & (width - 1)) != 0)) {
// i = 1;
// while ((sizeToFit ? 2 * i : i) < width)
// i *= 2;
// width = i;
// }
height = imageSize.Height;
// The Mac opengl version supports non power of 2 textures
// so we do not have to make them so
// if ((height != 1) && ((height & (height - 1)) != 0)) {
// i = 1;
// while ((sizeToFit ? 2 * i : i) < height)
// i *= 2;
// height = i;
// }
// TODO: kMaxTextureSize = 1024
// while ((width > 1024) || (height > 1024)) {
// width /= 2;
// height /= 2;
// transform = CGAffineTransform.MakeScale (0.5f, 0.5f);
// imageSize.Width /= 2;
// imageSize.Height /= 2;
// }
float size = Math.Max(width,height);
if(size > 1024)
{
float ratio = 1024 / size;
width = (int)(width * ratio);
height = (int)(height * ratio);
transform = CGAffineTransform.MakeScale(ratio, ratio);
imageSize.Width = (int)(imageSize.Width * ratio);
imageSize.Height = (int)(imageSize.Height * ratio);;
}
switch (pixelFormat) {
case SurfaceFormat.Color:
colorSpace = CGColorSpace.CreateDeviceRGB ();
data = Marshal.AllocHGlobal (height * width * 4);
context = new CGBitmapContext (data, width, height, 8, 4 * width, colorSpace,CGImageAlphaInfo.PremultipliedLast);
colorSpace.Dispose ();
break;
case SurfaceFormat.Alpha8:
data = Marshal.AllocHGlobal (height * width);
context = new CGBitmapContext (data, width, height, 8, width, null, CGImageAlphaInfo.Only);
break;
default:
throw new NotSupportedException ("Invalid pixel format");
}
context.ClearRect (new RectangleF (0,0,width,height));
context.TranslateCTM (0, height - imageSize.Height);
if (!transform.IsIdentity) {
context.ConcatCTM (transform);
}
context.DrawImage (new RectangleF (0, 0, image.Width, image.Height), image);
//Convert "RRRRRRRRRGGGGGGGGBBBBBBBBAAAAAAAA" to "RRRRRGGGGGGBBBBB"
/*
if(pixelFormat == SurfaceFormat.Rgb32) {
tempData = Marshal.AllocHGlobal(height * width * 2);
int d32;
short d16;
int inPixel32Count=0,outPixel16Count=0;
for(i = 0; i < width * height; ++i, inPixel32Count+=sizeof(int))
{
d32 = Marshal.ReadInt32(data,inPixel32Count);
short R = (short)((((d32 >> 0) & 0xFF) >> 3) << 11);
short G = (short)((((d32 >> 8) & 0xFF) >> 2) << 5);
short B = (short)((((d32 >> 16) & 0xFF) >> 3) << 0);
d16 = (short) (R | G | B);
Marshal.WriteInt16(tempData,outPixel16Count,d16);
outPixel16Count += sizeof(short);
}
Marshal.FreeHGlobal(data);
data = tempData;
}
*/
InitWithData (data, pixelFormat, width, height, imageSize, filter);
context.Dispose ();
Marshal.FreeHGlobal (data);
}
public Bitmap(int width, int height, PixelFormat format)
{
imageTransform = new CGAffineTransform(1, 0, 0, -1, 0, height);
int bitsPerComponent, bytesPerRow;
CGColorSpace colorSpace;
CGBitmapFlags bitmapInfo;
bool premultiplied = false;
int bitsPerPixel = 0;
pixelFormat = format;
// Don't forget to set the Image width and height for size.
imageSize.Width = width;
imageSize.Height = height;
switch (format){
case PixelFormat.Format32bppPArgb:
case PixelFormat.DontCare:
premultiplied = true;
colorSpace = CGColorSpace.CreateDeviceRGB ();
bitsPerComponent = 8;
bitsPerPixel = 32;
bitmapInfo = CGBitmapFlags.PremultipliedFirst;
break;
case PixelFormat.Format32bppArgb:
colorSpace = CGColorSpace.CreateDeviceRGB ();
bitsPerComponent = 8;
bitsPerPixel = 32;
bitmapInfo = CGBitmapFlags.PremultipliedFirst;
break;
case PixelFormat.Format32bppRgb:
colorSpace = CGColorSpace.CreateDeviceRGB ();
bitsPerComponent = 8;
bitsPerPixel = 32;
bitmapInfo = CGBitmapFlags.NoneSkipLast;
break;
case PixelFormat.Format24bppRgb:
colorSpace = CGColorSpace.CreateDeviceRGB ();
bitsPerComponent = 8;
bitsPerPixel = 32;
bitmapInfo = CGBitmapFlags.NoneSkipLast;
break;
default:
throw new Exception ("Format not supported: " + format);
}
bytesPerRow = width * bitsPerPixel/bitsPerComponent;
int size = bytesPerRow * height;
bitmapBlock = Marshal.AllocHGlobal (size);
var bitmap = new CGBitmapContext (bitmapBlock,
width, height,
bitsPerComponent,
bytesPerRow,
colorSpace,
bitmapInfo);
// This works for now but we need to look into initializing the memory area itself
// TODO: Look at what we should do if the image does not have alpha channel
bitmap.ClearRect (new RectangleF (0,0,width,height));
var provider = new CGDataProvider (bitmapBlock, size, true);
NativeCGImage = new CGImage (width, height, bitsPerComponent, bitsPerPixel, bytesPerRow, colorSpace, bitmapInfo, provider, null, false, CGColorRenderingIntent.Default);
dpiWidth = dpiHeight = ConversionHelpers.MS_DPI;
physicalDimension.Width = width;
physicalDimension.Height = height;
// The physical size may be off on certain implementations. For instance the dpiWidth and dpiHeight
// are read using integers in core graphics but in windows it is a float.
// For example:
// coregraphics dpiWidth = 24 as integer
// windows dpiWidth = 24.999935 as float
// this gives a few pixels difference when calculating the physical size.
// 256 * 96 / 24 = 1024
// 256 * 96 / 24.999935 = 983.04
//
// https://bugzilla.xamarin.com/show_bug.cgi?id=14365
// PR: https://github.com/mono/maccore/pull/57
//
physicalSize = new SizeF (physicalDimension.Width, physicalDimension.Height);
physicalSize.Width *= ConversionHelpers.MS_DPI / dpiWidth;
physicalSize.Height *= ConversionHelpers.MS_DPI / dpiHeight;
rawFormat = ImageFormat.MemoryBmp;
pixelFormat = format;
}
private void MakeSureWeHaveAnAlphaChannel()
{
// Initialize our prmultiplied tables.
if (!ConversionHelpers.sTablesInitialized)
ConversionHelpers.CalculateTables ();
var alphaInfo = NativeCGImage.AlphaInfo;
var hasAlpha = ((alphaInfo == CGImageAlphaInfo.PremultipliedLast)
|| (alphaInfo == CGImageAlphaInfo.PremultipliedFirst)
|| (alphaInfo == CGImageAlphaInfo.Last)
|| (alphaInfo == CGImageAlphaInfo.First) ? true : false);
if (cachedContext != null && cachedContext.Handle != IntPtr.Zero)
{
return;
}
// set our pixel format
pixelFormat = PixelFormat.Format32bppArgb;
// and mark the rawformat as from memory
rawFormat = ImageFormat.MemoryBmp;
//format = GetBestSupportedFormat (pixelFormat);
cachedContext = CreateCompatibleBitmapContext (NativeCGImage.Width, NativeCGImage.Height, pixelFormat);
// Fill our pixel data with the actual image information
cachedContext.DrawImage (new RectangleF (0, 0, NativeCGImage.Width, NativeCGImage.Height), NativeCGImage);
// Dispose of the prevous image that is allocated.
NativeCGImage.Dispose ();
// Get a reference to the pixel data
bitmapBlock = cachedContext.Data;
int size = cachedContext.BytesPerRow * cachedContext.Height;
var provider = new CGDataProvider (cachedContext.Data, size, true);
// Get the image from the bitmap context.
//NativeCGImage = bitmapContext.ToImage ();
CGColorSpace colorSpace = CGColorSpace.CreateDeviceRGB();
NativeCGImage = new CGImage (cachedContext.Width, cachedContext.Height, cachedContext.BitsPerComponent,
cachedContext.BitsPerPixel, cachedContext.BytesPerRow,
colorSpace,
cachedContext.AlphaInfo,
provider, null, true, CGColorRenderingIntent.Default);
colorSpace.Dispose ();
}
private void InitWithCGImage(CGImage image)
{
int width, height;
CGBitmapContext bitmap = null;
bool hasAlpha;
CGImageAlphaInfo alphaInfo;
CGColorSpace colorSpace;
int bitsPerComponent, bytesPerRow;
CGBitmapFlags bitmapInfo;
bool premultiplied = false;
int bitsPerPixel = 0;
if (image == null) {
throw new ArgumentException (" image is invalid! " );
}
alphaInfo = image.AlphaInfo;
hasAlpha = ((alphaInfo == CGImageAlphaInfo.PremultipliedLast) || (alphaInfo == CGImageAlphaInfo.PremultipliedFirst) || (alphaInfo == CGImageAlphaInfo.Last) || (alphaInfo == CGImageAlphaInfo.First) ? true : false);
imageSize.Width = image.Width;
imageSize.Height = image.Height;
width = image.Width;
height = image.Height;
// Not sure yet if we need to keep the original image information
// before we change it internally. TODO look at what windows does
// and follow that.
bitmapInfo = image.BitmapInfo;
bitsPerComponent = image.BitsPerComponent;
bitsPerPixel = image.BitsPerPixel;
bytesPerRow = width * bitsPerPixel/bitsPerComponent;
int size = bytesPerRow * height;
colorSpace = image.ColorSpace;
// Right now internally we represent the images all the same
// I left the call here just in case we find that this is not
// possible. Read the comments for non alpha images.
if(colorSpace != null) {
if( hasAlpha ) {
premultiplied = true;
colorSpace = CGColorSpace.CreateDeviceRGB ();
bitsPerComponent = 8;
bitsPerPixel = 32;
bitmapInfo = CGBitmapFlags.PremultipliedLast;
}
else
{
// even for images without alpha we will internally
// represent them as RGB with alpha. There were problems
// if we do not do it this way and creating a bitmap context.
// The images were not drawing correctly and tearing. Also
// creating a Graphics to draw on was a nightmare. This
// should probably be looked into or maybe it is ok and we
// can continue representing internally with this representation
premultiplied = true;
colorSpace = CGColorSpace.CreateDeviceRGB ();
bitsPerComponent = 8;
bitsPerPixel = 32;
bitmapInfo = CGBitmapFlags.NoneSkipLast;
}
} else {
premultiplied = true;
colorSpace = CGColorSpace.CreateDeviceRGB ();
bitsPerComponent = 8;
bitsPerPixel = 32;
bitmapInfo = CGBitmapFlags.NoneSkipLast;
}
bytesPerRow = width * bitsPerPixel/bitsPerComponent;
size = bytesPerRow * height;
bitmapBlock = Marshal.AllocHGlobal (size);
bitmap = new CGBitmapContext (bitmapBlock,
width, height,
bitsPerComponent,
bytesPerRow,
colorSpace,
bitmapInfo);
bitmap.ClearRect (new RectangleF (0,0,width,height));
// We need to flip the Y axis to go from right handed to lefted handed coordinate system
var transform = new CGAffineTransform(1, 0, 0, -1, 0, image.Height);
bitmap.ConcatCTM(transform);
bitmap.DrawImage(new RectangleF (0, 0, image.Width, image.Height), image);
var provider = new CGDataProvider (bitmapBlock, size, true);
NativeCGImage = new CGImage (width, height, bitsPerComponent,
bitsPerPixel, bytesPerRow,
colorSpace,
bitmapInfo,
provider, null, true, image.RenderingIntent);
colorSpace.Dispose();
bitmap.Dispose();
}
public void CreateFromImage(Bitmap image)
{
var handler = image.Handler as BitmapHandler;
SourceImage = image;
#if OSX
var rep = handler.Control.Representations().OfType<NSBitmapImageRep>().FirstOrDefault();
if (rep.BitsPerPixel != 32)
{
// CoreGraphics only supports drawing to 32bpp, create a new 32-bpp image and copy back when disposed or flushed.
DrawingImage = new Bitmap(image.Width, image.Height, PixelFormat.Format32bppRgb);
handler = DrawingImage.Handler as BitmapHandler;
rep = handler.Control.Representations().OfType<NSBitmapImageRep>().FirstOrDefault();
}
graphicsContext = NSGraphicsContext.FromBitmap(rep);
graphicsContext = graphicsContext.IsFlipped ? graphicsContext : NSGraphicsContext.FromGraphicsPort(graphicsContext.GraphicsPortHandle, true);
disposeContext = true;
Control = graphicsContext.GraphicsPort;
PointsPerPixel = (float)(rep.PixelsWide / handler.Control.Size.Width);
#elif IOS
var cgimage = handler.Control.CGImage;
Control = new CGBitmapContext(handler.Data.MutableBytes, cgimage.Width, cgimage.Height, cgimage.BitsPerComponent, cgimage.BytesPerRow, cgimage.ColorSpace, cgimage.BitmapInfo);
PointsPerPixel = (float)(cgimage.Width / handler.Control.Size.Width);
#endif
height = image.Size.Height;
SetDefaults();
InitializeContext(true);
if (DrawingImage != null && SourceImage != null)
{
// draw source image onto context, when source is incompatible for CoreGraphics drawing.
DrawImage(SourceImage, 0, 0);
}
}
public void CreateFromImage(Bitmap image)
{
var handler = image.Handler as BitmapHandler;
#if OSX
var rep = handler.Control.Representations().OfType<NSBitmapImageRep>().FirstOrDefault();
graphicsContext = NSGraphicsContext.FromBitmap(rep);
graphicsContext = graphicsContext.IsFlipped ? graphicsContext : NSGraphicsContext.FromGraphicsPort(graphicsContext.GraphicsPortHandle, true);
disposeContext = true;
Control = graphicsContext.GraphicsPort;
scale = (float)(rep.PixelsWide / handler.Control.Size.Width);
#elif IOS
var cgimage = handler.Control.CGImage;
Control = new CGBitmapContext(handler.Data.MutableBytes, cgimage.Width, cgimage.Height, cgimage.BitsPerComponent, cgimage.BytesPerRow, cgimage.ColorSpace, cgimage.BitmapInfo);
scale = cgimage.Width / handler.Control.Size.Width;
#endif
height = image.Size.Height;
SetDefaults();
InitializeContext(true);
}
public static Graphics FromImage(Image image)
{
if (image == null)
throw new ArgumentNullException ("image");
if ((image.PixelFormat & PixelFormat.Indexed) != 0)
throw new Exception ("Cannot create Graphics from an indexed bitmap.");
Bitmap b = image as Bitmap;
if (b == null)
throw new Exception ("Can not create Graphics contexts from " + image.GetType () + " Images, only Bitmaps are supported");
var cgimage = b.NativeCGImage;
if (b.bitmapBlock == IntPtr.Zero){
throw new Exception ("Missing functionality: currently we can not create graphics contexts from bitmaps loaded from disk, need to do some extra work");
}
// Creates a context using the parameters that were used initially for the bitmap,
// reusing the memory address space on it as well.
var bitmapContext = new CGBitmapContext (b.bitmapBlock,
cgimage.Width,
cgimage.Height,
cgimage.BitsPerComponent,
cgimage.BytesPerRow,
cgimage.ColorSpace,
cgimage.AlphaInfo);
return new Graphics (bitmapContext);
}
internal CGBitmapContext GetRenderableContext()
{
if (cachedContext != null && cachedContext.Handle != IntPtr.Zero)
return cachedContext;
var format = GetBestSupportedFormat (pixelFormat);
var bitmapContext = CreateCompatibleBitmapContext (NativeCGImage.Width, NativeCGImage.Height, format);
bitmapContext.DrawImage (new RectangleF (0, 0, NativeCGImage.Width, NativeCGImage.Height), NativeCGImage);
int size = bitmapContext.BytesPerRow * bitmapContext.Height;
var provider = new CGDataProvider (bitmapContext.Data, size, true);
CGColorSpace colorSpace = CGColorSpace.CreateDeviceRGB();
NativeCGImage = new CGImage (bitmapContext.Width, bitmapContext.Height, bitmapContext.BitsPerComponent,
bitmapContext.BitsPerPixel, bitmapContext.BytesPerRow,
colorSpace,
bitmapContext.AlphaInfo,
provider, null, true, CGColorRenderingIntent.Default);
colorSpace.Dispose ();
cachedContext = bitmapContext;
return cachedContext;
}
public Bitmap(int width, int height, PixelFormat format)
{
int bitsPerComponent, bytesPerRow;
CGColorSpace colorSpace;
CGBitmapFlags bitmapInfo;
bool premultiplied = false;
int bitsPerPixel = 0;
// Don't forget to set the Image width and height for size.
imageSize.Width = width;
imageSize.Height = height;
switch (format){
case PixelFormat.Format32bppPArgb:
premultiplied = true;
colorSpace = CGColorSpace.CreateDeviceRGB ();
bitsPerComponent = 8;
bitsPerPixel = 32;
bitmapInfo = CGBitmapFlags.PremultipliedFirst;
break;
case PixelFormat.Format32bppArgb:
colorSpace = CGColorSpace.CreateDeviceRGB ();
bitsPerComponent = 8;
bitsPerPixel = 32;
bitmapInfo = CGBitmapFlags.PremultipliedFirst;
break;
case PixelFormat.Format32bppRgb:
colorSpace = CGColorSpace.CreateDeviceRGB ();
bitsPerComponent = 8;
bitsPerPixel = 32;
bitmapInfo = CGBitmapFlags.None;
break;
default:
throw new Exception ("Format not supported: " + format);
}
bytesPerRow = width * bitsPerPixel/bitsPerComponent;
int size = bytesPerRow * height;
bitmapBlock = Marshal.AllocHGlobal (size);
var bitmap = new CGBitmapContext (bitmapBlock,
width, height,
bitsPerComponent,
bytesPerRow,
colorSpace,
CGImageAlphaInfo.PremultipliedLast);
// This works for now but we need to look into initializing the memory area itself
// TODO: Look at what we should do if the image does not have alpha channel
bitmap.ClearRect (new RectangleF (0,0,width,height));
var provider = new CGDataProvider (bitmapBlock, size, true);
NativeCGImage = new CGImage (width, height, bitsPerComponent, bitsPerPixel, bytesPerRow, colorSpace, bitmapInfo, provider, null, false, CGColorRenderingIntent.Default);
}
private CGBitmapContext CreateCompatibleBitmapContext(int width, int height, PixelFormat pixelFormat, IntPtr pixelData)
{
int bitsPerComponent, bytesPerRow;
CGColorSpace colorSpace;
CGImageAlphaInfo alphaInfo;
bool premultiplied = false;
int bitsPerPixel = 0;
// CoreGraphics only supports a few options so we have to make do with what we have
// https://developer.apple.com/library/mac/qa/qa1037/_index.html
switch (pixelFormat)
{
case PixelFormat.Format32bppPArgb:
case PixelFormat.DontCare:
premultiplied = true;
colorSpace = CGColorSpace.CreateDeviceRGB ();
bitsPerComponent = 8;
bitsPerPixel = 32;
alphaInfo = CGImageAlphaInfo.PremultipliedLast;
break;
case PixelFormat.Format32bppArgb:
colorSpace = CGColorSpace.CreateDeviceRGB ();
bitsPerComponent = 8;
bitsPerPixel = 32;
alphaInfo = CGImageAlphaInfo.PremultipliedLast;
break;
case PixelFormat.Format32bppRgb:
colorSpace = CGColorSpace.CreateDeviceRGB ();
bitsPerComponent = 8;
bitsPerPixel = 32;
alphaInfo = CGImageAlphaInfo.PremultipliedLast;
break;
case PixelFormat.Format24bppRgb:
colorSpace = CGColorSpace.CreateDeviceRGB ();
bitsPerComponent = 8;
bitsPerPixel = 32;
alphaInfo = CGImageAlphaInfo.PremultipliedLast;
break;
default:
throw new Exception ("Format not supported: " + pixelFormat);
}
bytesPerRow = width * bitsPerPixel/bitsPerComponent;
int size = bytesPerRow * height;
var bitmap = new CGBitmapContext (pixelData,
width, height,
bitsPerComponent,
bytesPerRow,
colorSpace,
alphaInfo);
colorSpace.Dispose ();
return bitmap;
}
private void DrawNoise(float opacity)
{
if (_noiseImageRef == null)
{
const int width = 124;
const int height = width;
const int size = width * height;
var rgba = new byte[size];
var random = new Random(120);
for (var i = 0; i < size; i++)
{
rgba[i] = (byte)(random.Next() % 256);
}
var colorSpace = CGColorSpace.CreateDeviceGray();
var bitmapContext = new CGBitmapContext(rgba, width, height, 8, width, colorSpace, CGImageAlphaInfo.None);
_noiseImageRef = bitmapContext.ToImage();
}
var context = NSGraphicsContext.CurrentContext.GraphicsPort;
NSGraphicsContext.CurrentContext.SaveGraphicsState();
context.SetAlpha(opacity);
context.SetBlendMode(CGBlendMode.Screen);
var scaleFactor = Window.BackingScaleFactor;
context.ScaleCTM(1f / scaleFactor, 1f / scaleFactor);
var imageRect = new RectangleF(PointF.Empty, new SizeF(_noiseImageRef.Width, _noiseImageRef.Height));
context.DrawTiledImage(imageRect, _noiseImageRef);
NSGraphicsContext.CurrentContext.RestoreGraphicsState();
}