void GetImagaDataFromPath (string path)
{
int width, height;
NSImage src;
CGImage image;
CGContext context = null;
RectangleF rect = RectangleF.Empty;
data = new byte[TEXTURE_WIDTH * TEXTURE_HEIGHT * 4];
src = new NSImage (path);
image = src.AsCGImage (ref rect, null, null);
width = image.Width;
height = image.Height;
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);
}
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 ()
};
}
void GetImagaDataFromPath (string path)
{
NSImage src;
CGImage image;
CGContext context = null;
src = new NSImage (path);
image = src.AsCGImage (RectangleF.Empty, null, null);
width = image.Width;
height = image.Height;
int bytesPerRow = image.BytesPerRow;
int bitsPerPixel = image.BitsPerPixel;
int bitsPerComponent = image.BitsPerComponent;
data = new byte[bytesPerRow * height * 4];
CGImageAlphaInfo ai = CGImageAlphaInfo.PremultipliedLast;
CGColorSpace colorSpace = CGColorSpace.CreateDeviceRGB();
context = new CGBitmapContext (data, width, height, 8, 4 * width, 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);
}
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;
}
}
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;
}
