OneScript/src/TestApp/Controls/ImageArray.cs at develop · bapho-bush/OneScript · GitHub

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/*----------------------------------------------------------

This Source Code Form is subject to the terms of the

Mozilla Public License, v.2.0. If a copy of the MPL

was not distributed with this file, You can obtain one

at http://mozilla.org/MPL/2.0/.

----------------------------------------------------------*/

using System;

using System.Collections.Generic;

using System.Drawing;

using System.Windows.Media;

using System.Windows.Media.Imaging;

namespace V8Reader.Core

{

class ImageArray

{

Bitmap m_CompleteImage;

public int Count { get; private set; }

public int IconWidth { get; private set; }

public int IconHeight { get; private set; }

public ImageArray(Bitmap Source, int ItemWidth, int ItemHeight)

{

if (ItemWidth <= 0 || ItemHeight <= 0)

throw new ArgumentException();

m_CompleteImage = (Bitmap)Source.Clone();

Count = m_CompleteImage.Width / ItemWidth;

IconWidth = ItemWidth;

IconHeight = ItemHeight;

}

public Bitmap this[int index]

{

get

{

return GetItem(index);

}

private Bitmap GetItem(int index)

{

if (index < 0 || index >= Count)

throw new IndexOutOfRangeException();

int startPoint = IconWidth * index;

Bitmap ItemBitmap = new Bitmap(IconWidth, IconHeight, m_CompleteImage.PixelFormat);

Graphics.FromImage(ItemBitmap).DrawImage(m_CompleteImage,

new Rectangle(0, 0, IconWidth, IconHeight),

new Rectangle(startPoint, 0, IconWidth, IconHeight),

GraphicsUnit.Pixel);

return ItemBitmap;

}

class WPFImageArray

{

public WPFImageArray(BitmapImage Source, int ItemWidth, int ItemHeight)

{

m_CompleteImage = Source.Clone();

m_CompleteImage.Freeze();

Load(ItemWidth, ItemHeight);

}

public WPFImageArray(Uri ResourceURI, int ItemWidth, int ItemHeight)

{

m_CompleteImage = new BitmapImage(ResourceURI);

Load(ItemWidth, ItemHeight);

}

public ImageSource this[int index]

{

get

{

return GetItem(index);

}

private ImageSource GetItem(int index)

{

if (index < 0 || index >= Count)

throw new IndexOutOfRangeException();

if(m_Cache.ContainsKey(index))

{

return m_Cache[index];

}

int startPoint = IconWidth * index;

var Frame = new System.Windows.Int32Rect(startPoint, 0, IconWidth, IconHeight);

byte[] bits = new byte[m_CompleteImage.PixelHeight * stride];

m_CompleteImage.CopyPixels(Frame, bits, stride, 0);

WriteableBitmap target = new WriteableBitmap(

IconWidth,

IconHeight,

m_CompleteImage.DpiX, m_CompleteImage.DpiY,

m_CompleteImage.Format, null);

// Write the pixel data to the WriteableBitmap.

target.WritePixels(

new System.Windows.Int32Rect(0, 0, IconWidth, IconHeight),

bits, stride, 0);

target.Freeze();

m_Cache.Add(index, target);

return target;

}

private void Load(int ItemWidth, int ItemHeight)

{

//int bytesPerPixel = (width * m_CompleteImage.Format.BitsPerPixel + 7) / 8;

//stride = width * bytesPerPixel;

stride = m_CompleteImage.PixelWidth * (m_CompleteImage.Format.BitsPerPixel / 8);

Count = (int)m_CompleteImage.Width / ItemWidth;

IconWidth = ItemWidth;

IconHeight = ItemHeight;

}

public int Count { get; private set; }

public int IconWidth { get; private set; }

public int IconHeight { get; private set; }

private BitmapImage m_CompleteImage;

private int stride;

private Dictionary<int, ImageSource> m_Cache = new Dictionary<int,ImageSource>();

}

OneScript/src/TestApp/Controls/ImageArray.cs at develop · bapho-bush/OneScript · GitHub

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