| 1 | #Region "Microsoft.VisualBasic::2a647313fb64d477e080229f308b3733, Microsoft.VisualBasic.Core\Extensions\Image\Bitmap\BitmapBuffer.vb" |
| 2 | |
| 3 | ' Author: |
| 4 | ' |
| 5 | ' asuka (amethyst.asuka@gcmodeller.org) |
| 6 | ' xie (genetics@smrucc.org) |
| 7 | ' xieguigang (xie.guigang@live.com) |
| 8 | ' |
| 9 | ' Copyright (c) 2018 GPL3 Licensed |
| 10 | ' |
| 11 | ' |
| 12 | ' GNU GENERAL PUBLIC LICENSE (GPL3) |
| 13 | ' |
| 14 | ' |
| 15 | ' This program is free software: you can redistribute it and/or modify |
| 16 | ' it under the terms of the GNU General Public License as published by |
| 17 | ' the Free Software Foundation, either version 3 of the License, or |
| 18 | ' (at your option) any later version. |
| 19 | ' |
| 20 | ' This program is distributed in the hope that it will be useful, |
| 21 | ' but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 22 | ' MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 23 | ' GNU General Public License for more details. |
| 24 | ' |
| 25 | ' You should have received a copy of the GNU General Public License |
| 26 | ' along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 27 | |
| 28 | |
| 29 | |
| 30 | ' /********************************************************************************/ |
| 31 | |
| 32 | ' Summaries: |
| 33 | |
| 34 | ' Class BitmapBuffer |
| 35 | ' |
| 36 | ' Properties: Height, Size, Stride, Width |
| 37 | ' |
| 38 | ' Constructor: (+1 Overloads) Sub New |
| 39 | ' |
| 40 | ' Function: FromBitmap, FromImage, GetEnumerator, GetImage, GetIndex |
| 41 | ' GetPixel, IEnumerable_GetEnumerator, OutOfRange |
| 42 | ' |
| 43 | ' Sub: Dispose, SetPixel |
| 44 | ' |
| 45 | ' Operators: + |
| 46 | ' |
| 47 | ' |
| 48 | ' /********************************************************************************/ |
| 49 | |
| 50 | #End Region |
| 51 | |
| 52 | Imports System.Drawing |
| 53 | Imports System.Drawing.Imaging |
| 54 | Imports System.Runtime.CompilerServices |
| 55 | Imports sys = System.Math |
| 56 | |
| 57 | Namespace Imaging.BitmapImage |
| 58 | |
| 59 | ''' <summary> |
| 60 | ''' Unsafe memory pointer of the <see cref="Bitmap"/> data buffer.(线程不安全的图片数据对象) |
| 61 | ''' </summary> |
| 62 | Public Class BitmapBuffer : Inherits Emit.Marshal.Byte |
| 63 | Implements IDisposable |
| 64 | Implements IEnumerable(Of Color) |
| 65 | |
| 66 | ReadOnly raw As Bitmap |
| 67 | ReadOnly handle As BitmapData |
| 68 | |
| 69 | Protected Sub New(ptr As IntPtr, |
| 70 | byts%, |
| 71 | raw As Bitmap, |
| 72 | handle As BitmapData) |
| 73 | |
| 74 | Call MyBase.New(ptr, byts) |
| 75 | |
| 76 | Me.raw = raw |
| 77 | Me.handle = handle |
| 78 | |
| 79 | Stride = handle.Stride |
| 80 | Width = raw.Width |
| 81 | Height = raw.Height |
| 82 | Size = New Size(Width, Height) |
| 83 | End Sub |
| 84 | |
| 85 | Public ReadOnly Property Width As Integer |
| 86 | Public ReadOnly Property Height As Integer |
| 87 | Public ReadOnly Property Size As Size |
| 88 | Public ReadOnly Property Stride As Integer |
| 89 | |
| 90 | ''' <summary> |
| 91 | ''' Gets a copy of the original raw image value that which constructed this bitmap object class |
| 92 | ''' </summary> |
| 93 | ''' <returns></returns> |
| 94 | ''' |
| 95 | <MethodImpl(MethodImplOptions.AggressiveInlining)> |
| 96 | Public Function GetImage() As Bitmap |
| 97 | Return DirectCast(raw.Clone, Bitmap) |
| 98 | End Function |
| 99 | |
| 100 | ' pixel: (1,1)(2,1)(3,1)(4,1)(1,2)(2,2)(3,2)(4,2) |
| 101 | ' buffer: BGRA|BGRA|BGRA|BGRA|BGRA|BGRA|BGRA|BGRA| |
| 102 | ' bitmap pixels: |
| 103 | ' |
| 104 | ' (1,1)(2,1)(3,1)(4,1) |
| 105 | ' (1,2)(2,2)(3,2)(4,2) |
| 106 | ' |
| 107 | ' width = 4 pixel |
| 108 | ' height = 2 pixel |
| 109 | |
| 110 | ''' <summary> |
| 111 | ''' 返回第一个元素的位置 |
| 112 | ''' </summary> |
| 113 | ''' <param name="x"></param> |
| 114 | ''' <param name="y"></param> |
| 115 | ''' <returns>B, G, R</returns> |
| 116 | ''' <remarks> |
| 117 | ''' ###### 2017-11-29 |
| 118 | ''' 经过测试,对第一行的数据的计算没有问题 |
| 119 | ''' </remarks> |
| 120 | <MethodImpl(MethodImplOptions.AggressiveInlining)> |
| 121 | Public Function GetIndex(x As Integer, y As Integer) As Integer |
| 122 | y = y * (Width * 4) |
| 123 | x = x * 4 |
| 124 | Return x + y |
| 125 | End Function |
| 126 | |
| 127 | <MethodImpl(MethodImplOptions.AggressiveInlining)> |
| 128 | Public Function OutOfRange(x%, y%) As Boolean |
| 129 | Return x < 0 OrElse x >= Width OrElse y < 0 OrElse y >= Height |
| 130 | End Function |
| 131 | |
| 132 | ''' <summary> |
| 133 | ''' Gets the color of the specified pixel in this <see cref="Bitmap"/>. |
| 134 | ''' (<paramref name="x"/>和<paramref name="y"/>都是以零为底的) |
| 135 | ''' </summary> |
| 136 | ''' <param name="x">The x-coordinate of the pixel to retrieve.</param> |
| 137 | ''' <param name="y">The y-coordinate of the pixel to retrieve.</param> |
| 138 | ''' <returns> |
| 139 | ''' A <see cref="Color"/> structure that represents the color of the specified pixel. |
| 140 | ''' </returns> |
| 141 | ''' |
| 142 | <MethodImpl(MethodImplOptions.AggressiveInlining)> |
| 143 | Public Function GetPixel(x As Integer, y As Integer) As Color |
| 144 | Dim i As Integer = GetIndex(x, y) |
| 145 | Dim iA As Byte = buffer(i + 3) |
| 146 | Dim iR As Byte = buffer(i + 2) |
| 147 | Dim iG As Byte = buffer(i + 1) |
| 148 | Dim iB As Byte = buffer(i + 0) |
| 149 | |
| 150 | Return Color.FromArgb(CInt(iA), CInt(iR), CInt(iG), CInt(iB)) |
| 151 | End Function |
| 152 | |
| 153 | ''' <summary> |
| 154 | ''' Sets the color of the specified pixel in this System.Drawing.Bitmap.(这个函数线程不安全) |
| 155 | ''' </summary> |
| 156 | ''' <param name="x">The x-coordinate of the pixel to set.</param> |
| 157 | ''' <param name="y">The y-coordinate of the pixel to set.</param> |
| 158 | ''' <param name="color"> |
| 159 | ''' A System.Drawing.Color structure that represents the color to assign to the specified |
| 160 | ''' pixel.</param> |
| 161 | ''' |
| 162 | <MethodImpl(MethodImplOptions.AggressiveInlining)> |
| 163 | Public Sub SetPixel(x As Integer, y As Integer, color As Color) |
| 164 | Dim i As Integer = GetIndex(x, y) |
| 165 | |
| 166 | buffer(i + 3) = color.A |
| 167 | buffer(i + 2) = color.R |
| 168 | buffer(i + 1) = color.G |
| 169 | buffer(i + 0) = color.B |
| 170 | End Sub |
| 171 | |
| 172 | ''' <summary> |
| 173 | ''' 这个函数会自动复制原始图片数据里面的东西的 |
| 174 | ''' </summary> |
| 175 | ''' <param name="res"></param> |
| 176 | ''' <returns></returns> |
| 177 | ''' |
| 178 | <MethodImpl(MethodImplOptions.AggressiveInlining)> |
| 179 | Public Shared Function FromImage(res As Image) As BitmapBuffer |
| 180 | Return BitmapBuffer.FromBitmap(New Bitmap(res)) |
| 181 | End Function |
| 182 | |
| 183 | Public Shared Function FromBitmap(curBitmap As Bitmap) As BitmapBuffer |
| 184 | ' Lock the bitmap's bits. |
| 185 | Dim rect As New Rectangle(0, 0, curBitmap.Width, curBitmap.Height) |
| 186 | Dim bmpData As BitmapData = curBitmap.LockBits( |
| 187 | rect, |
| 188 | ImageLockMode.ReadWrite, |
| 189 | curBitmap.PixelFormat) |
| 190 | |
| 191 | ' Get the address of the first line. |
| 192 | Dim ptr As IntPtr = bmpData.Scan0 |
| 193 | ' Declare an array to hold the bytes of the bitmap. |
| 194 | Dim bytes As Integer = sys.Abs(bmpData.Stride) * curBitmap.Height |
| 195 | |
| 196 | Return New BitmapBuffer(ptr, bytes, curBitmap, bmpData) |
| 197 | End Function |
| 198 | |
| 199 | Protected Overrides Sub Dispose(disposing As Boolean) |
| 200 | Call Write() |
| 201 | Call raw.UnlockBits(handle) |
| 202 | End Sub |
| 203 | |
| 204 | Public Iterator Function GetEnumerator() As IEnumerator(Of Color) Implements IEnumerable(Of Color).GetEnumerator |
| 205 | For Each x As Color In buffer.Colors |
| 206 | Yield x |
| 207 | Next |
| 208 | End Function |
| 209 | |
| 210 | Private Iterator Function IEnumerable_GetEnumerator() As IEnumerator Implements IEnumerable.GetEnumerator |
| 211 | Yield GetEnumerator() |
| 212 | End Function |
| 213 | |
| 214 | ''' <summary> |
| 215 | ''' Current pointer location offset to next position |
| 216 | ''' </summary> |
| 217 | ''' <param name="bmp"></param> |
| 218 | ''' <param name="offset%"></param> |
| 219 | ''' <returns></returns> |
| 220 | ''' |
| 221 | <MethodImpl(MethodImplOptions.AggressiveInlining)> |
| 222 | Public Overloads Shared Operator +(bmp As BitmapBuffer, offset%) As BitmapBuffer |
| 223 | bmp.index += offset |
| 224 | Return bmp |
| 225 | End Operator |
| 226 | End Class |
| 227 | End Namespace |