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//
// BmpPicture.cs
//
// Author:
// Jean-Philippe Bruyère <jp.bruyere@hotmail.com>
//
// Copyright (c) 2013-2017 Jean-Philippe Bruyère
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
using System;
using System.IO;
using Cairo;
namespace Crow
{
/// <summary>
/// Derived from FILL for loading and drawing bitmaps in the interface
/// </summary>
public class BmpPicture : Picture
{
byte[] image = null;
#region CTOR
/// <summary>
/// Initializes a new instance of BmpPicture.
/// </summary>
public BmpPicture ()
{}
/// <summary>
/// Initializes a new instance of BmpPicture by loading the image pointed by the path argument
/// </summary>
/// <param name="path">image path, may be embedded</param>
public BmpPicture (string path) : base(path)
{}
#endregion
/// <summary>
/// load the image for rendering from the path given as argument
/// </summary>
/// <param name="path">image path, may be embedded</param>
public override void Load (Interface iface, string path)
{
Path = path;
if (sharedResources.ContainsKey (path)) {
sharedPicture sp = sharedResources [path];
image = (byte[])sp.Data;
Dimensions = sp.Dims;
} else {
using (Stream stream = iface.GetStreamFromPath (path)) {
loadBitmap (new System.Drawing.Bitmap (stream));
}
sharedResources [path] = new sharedPicture (image, Dimensions);
}
Loaded = true;
}
//load image via System.Drawing.Bitmap, cairo load png only
void loadBitmap (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);
Dimensions = 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);
}
#region implemented abstract members of Fill
public override void SetAsSource (Context ctx, Rectangle bounds = default(Rectangle))
{
float widthRatio = 1f;
float heightRatio = 1f;
if (Scaled){
widthRatio = (float)bounds.Width / Dimensions.Width;
heightRatio = (float)bounds.Height / Dimensions.Height;
}
if (KeepProportions) {
if (widthRatio < heightRatio)
heightRatio = widthRatio;
else
widthRatio = heightRatio;
}
using (ImageSurface tmp = new ImageSurface (Format.Argb32, bounds.Width, bounds.Height)) {
using (Context gr = new Context (tmp)) {
gr.Translate (bounds.Left, bounds.Top);
gr.Scale (widthRatio, heightRatio);
gr.Translate ((bounds.Width/widthRatio - Dimensions.Width)/2, (bounds.Height/heightRatio - Dimensions.Height)/2);
using (ImageSurface imgSurf = new ImageSurface (image, Format.Argb32,
Dimensions.Width, Dimensions.Height, 4 * Dimensions.Width)) {
gr.SetSourceSurface (imgSurf, 0,0);
gr.Paint ();
}
}
ctx.SetSource (tmp);
}
}
#endregion
/// <summary>
/// paint the image in the rectangle given in arguments according
/// to the Scale and keepProportion parameters.
/// </summary>
/// <param name="gr">drawing Backend context</param>
/// <param name="rect">bounds of the target surface to paint</param>
/// <param name="subPart">used for svg only</param>
public override void Paint (Context gr, Rectangle rect, string subPart = "")
{
float widthRatio = 1f;
float heightRatio = 1f;
if (Scaled){
widthRatio = (float)rect.Width / Dimensions.Width;
heightRatio = (float)rect.Height / Dimensions.Height;
}
if (KeepProportions) {
if (widthRatio < heightRatio)
heightRatio = widthRatio;
else
widthRatio = heightRatio;
}
gr.Save ();
gr.Translate (rect.Left,rect.Top);
gr.Scale (widthRatio, heightRatio);
gr.Translate ((rect.Width/widthRatio - Dimensions.Width)/2, (rect.Height/heightRatio - Dimensions.Height)/2);
using (ImageSurface imgSurf = new ImageSurface (image, Format.Argb32,
Dimensions.Width, Dimensions.Height, 4 * Dimensions.Width)) {
gr.SetSourceSurface (imgSurf, 0,0);
gr.Paint ();
}
gr.Restore ();
}
}
}
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