add from giga-device, new branch added

StgSharp.Common/Graphics/Image.cs

@@ -0,0 +1,210 @@
+//-----------------------------------------------------------------------
+//-----------------------------------------------------------------------
+//     file="Image.cs"
+//     Project: StgSharp
+//     AuthorGroup: Nitload Space
+//     Copyright (c) Nitload Space. All rights reserved.
+//     
+//     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 StgSharp.Graphics.OpenGL;
+using StgSharp.Internal;
+using StgSharp.Mathematics;
+
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StgSharp.Graphics
+{
+    public class Image : ISSDSerializable, IImageProvider
+    {
+
+        private byte[] _data;
+        private ImageInfo _rawInfo;
+        private int _pixelUpdateCount = 0;
+
+        internal unsafe Image()
+        {
+            _rawInfo = new ImageInfo();
+        }
+
+        internal Image( ImageInfo information )
+        {
+            _rawInfo = information;
+            _data = Array.Empty<byte>();
+
+            //int length = _rawInfo.width * _rawInfo.height * _rawInfo.channel;
+        }
+
+        public (int width, int height) Size
+        {
+            get => (_rawInfo.Width, _rawInfo.Height);
+        }
+
+        public byte[] PixelBuffer
+        {
+            get
+            {
+                if( ( _data.Length == 0 ) || ( _data == null ) )
+                {
+                    GetBytes();
+                    return _data!;
+                }
+                return _data;
+            }
+        }
+
+        public ImageChannel Channel => _rawInfo.Channel;
+
+        /// <summary>
+        ///   Hash code of time pixels updated last time.
+        /// </summary>
+        public int PixelUpdateCount
+        {
+            get => _pixelUpdateCount;
+            internal set => _pixelUpdateCount = value;
+        }
+
+        public int ChannelCount => _rawInfo.ChannelCount;
+
+        public int Height
+        {
+            get => _rawInfo.Height;
+            internal set => _rawInfo.Height = value;
+        }
+
+        public int Width
+        {
+            get => _rawInfo.Width;
+            internal set => _rawInfo.Width = value;
+        }
+
+        public int PixelSize => ImageInfo.GetPixelSize( _rawInfo.pixelLayout, _rawInfo.Channel );
+
+        public PixelChannelLayout PixelLayout
+        {
+            get => _rawInfo.pixelLayout;
+            private set => _rawInfo.pixelLayout = value;
+        }
+
+        public SerializableTypeCode SSDTypeCode => SerializableTypeCode.PixelImage;
+
+        internal ref byte[] Data
+        {
+            get => ref _data;
+        }
+
+        public void FromBytes( byte[] stream ) { }
+
+        public static unsafe Image FromFile( string route, ImageLoader loader )
+        {
+            Image ret = new Image();
+            fixed( ImageInfo* iptr = &ret._rawInfo ) {
+                InternalIO.InternalLoadImage( route, iptr, loader );
+            }
+            return ret;
+        }
+
+        public static Image FromMemory(
+                            (int width, int height) size,
+                            ImageChannel channel,
+                            byte[] stream )
+        {
+            ImageInfo _info = new ImageInfo
+            {
+                Height = size.height,
+                Width = size.width,
+                Channel = channel,
+                StreamPtr = IntPtr.Zero
+            };
+            Image ret = new Image( _info );
+            ret.PixelLayout = PixelChannelLayout.Byte;
+            ret._data = stream;
+            return ret;
+        }
+
+        public static Image FromMemory(
+                            (int width, int height) size,
+                            ImageChannel channel,
+                            PixelChannelLayout layout,
+                            byte[] stream )
+        {
+            ImageInfo _info = new ImageInfo
+            {
+                Height = size.height,
+                Width = size.width,
+                Channel = channel,
+                StreamPtr = IntPtr.Zero
+            };
+            Image ret = new Image( _info );
+            ret.PixelLayout = layout;
+            ret._data = stream;
+            return ret;
+        }
+
+        public unsafe byte[] GetBytes()
+        {
+            if( _data.Length == 0 )
+            {
+                int size = Width * Height * ImageInfo.GetPixelSize( PixelLayout, Channel );
+                _data = new Span<byte>( ( byte* )_rawInfo.StreamPtr, size ).ToArray();
+                fixed( ImageInfo* pptr = &_rawInfo ) {
+                    InternalIO.InternalUnloadImage( pptr );
+                }
+                _rawInfo.StreamPtr = IntPtr.Zero;
+            }
+            return _data;
+        }
+
+        public Image ProvideImage() => this;
+
+        internal static Image FromMemory( ImageInfo info, byte[] data, int operationCount )
+        {
+            return new Image
+            {
+                _rawInfo = info,
+                _data = data,
+                _pixelUpdateCount = operationCount
+            };
+        }
+
+        byte[] ISSDSerializable.GetBytes()
+        {
+            throw new NotImplementedException();
+        }
+
+    }
+}
+
+namespace StgSharp.Graphics.OpenGL
+{
+    public static partial class GlHelper { }
+}