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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Cairo;
using System.IO;
using System.Runtime.InteropServices;
namespace go
{
public class Image : GraphicObject
{
byte[] image;
Rsvg.Handle hSVG;
Size imgSize;
string _imgPath;
[System.Xml.Serialization.XmlIgnore]
public System.Drawing.Bitmap Bitmap {
set {
loadImage (value);
}
}
[System.Xml.Serialization.XmlAttributeAttribute("Path")]
public string ImagePath {
get { return _imgPath; }
set {
_imgPath = value;
loadImage (_imgPath);
}
}
public Image () : base()
{
}
public Image (string ImagePath, Rectangle _bounds)
: base(_bounds)
{
_imgPath = ImagePath;
loadImage(_imgPath);
}
public Image (string ImagePath)
: base()
{
_imgPath = ImagePath;
loadImage(_imgPath);
}
public Image (System.Drawing.Bitmap _bitmap)
: base()
{
Bitmap = _bitmap;
}
protected override Size measureRawSize ()
{
if (image == null && hSVG == null)
loadRessourceSvg ("go.image.icons.question_mark");
return imgSize + Margin*2;
}
void loadRessourceSvg(string resId)
{
Stream s = System.Reflection.Assembly.GetExecutingAssembly().GetManifestResourceStream(resId);
using (MemoryStream ms = new MemoryStream ()) {
s.CopyTo (ms);
hSVG = new Rsvg.Handle (ms.ToArray ());
imgSize = new Size (hSVG.Dimensions.Width, hSVG.Dimensions.Height);
_imgPath = resId;
//loadImage (@"Images/Icons/question_mark.svg");
}
}
//load image via System.Drawing.Bitmap, cairo load png only
public void loadImage (string path)
{
if (!File.Exists(path))
return;
if (path.EndsWith (".svg", true,System.Globalization.CultureInfo.InvariantCulture)) {
hSVG = new Rsvg.Handle (path);
imgSize = new Size (hSVG.Dimensions.Width, hSVG.Dimensions.Height);
}else
loadImage (new System.Drawing.Bitmap (path));
_imgPath = path;
}
public void loadImage (System.Drawing.Bitmap bitmap)
{
if (bitmap == null)
return;
System.Drawing.Imaging.BitmapData data = bitmap.LockBits
(new System.Drawing.Rectangle (0, 0, bitmap.Width, bitmap.Height),
System.Drawing.Imaging.ImageLockMode.ReadOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
imgSize = new Size (bitmap.Width, bitmap.Height);
int stride = data.Stride;
int bitmapSize = Math.Abs (data.Stride) * bitmap.Height;
image = new byte[bitmapSize];
System.Runtime.InteropServices.Marshal.Copy (data.Scan0, image, 0, bitmapSize);
bitmap.UnlockBits (data);
//bitmap.Dispose();
}
protected override void onDraw (Context gr)
{
base.onDraw (gr);
float widthRatio = (float)ClientRectangle.Width / imgSize.Width;
float heightRatio = (float)ClientRectangle.Height / imgSize.Height;
float ratio = Math.Min (widthRatio, heightRatio);
Rectangle rImg = ClientRectangle;
gr.Save ();
gr.Scale (widthRatio, heightRatio);
if (hSVG == null) {
using (ImageSurface imgSurf = new ImageSurface (image, Format.Argb32,
imgSize.Width, imgSize.Height, 4 * imgSize.Width)) {
gr.SetSourceSurface (imgSurf, (int)(rImg.X / widthRatio), (int)(rImg.Y / heightRatio));
gr.Paint ();
}
} else {
gr.Translate (rImg.X/widthRatio, rImg.Y/heightRatio);
hSVG.RenderCairo (gr);
}
gr.Restore ();
}
}
}
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