本文整理汇总了VB.NET中System.Drawing.Imaging.ImageAttributes.SetColorMatrix方法的典型用法代码示例。如果您正苦于以下问题:VB.NET ImageAttributes.SetColorMatrix方法的具体用法?VB.NET ImageAttributes.SetColorMatrix怎么用?VB.NET ImageAttributes.SetColorMatrix使用的例子?那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.Drawing.Imaging.ImageAttributes
的用法示例。
在下文中一共展示了ImageAttributes.SetColorMatrix方法的3个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的VB.NET代码示例。
示例1: SetColorMatrixExample
Public Sub SetColorMatrixExample(ByVal e As PaintEventArgs)
' Create a rectangle image with all colors set to 128 (medium
' gray).
Dim myBitmap As New Bitmap(50, 50, PixelFormat.Format32bppArgb)
Dim g As Graphics = Graphics.FromImage(myBitmap)
g.FillRectangle(New SolidBrush(Color.FromArgb(255, 128, 128, _
128)), New Rectangle(0, 0, 50, 50))
myBitmap.Save("Rectangle1.jpg")
' Open an Image file and draw it to the screen.
Dim myImage As Image = Image.FromFile("Rectangle1.jpg")
e.Graphics.DrawImage(myImage, 20, 20)
' Initialize the color matrix.
Dim myColorMatrix As New ColorMatrix
myColorMatrix.Matrix00 = 1.75F
' Red
myColorMatrix.Matrix11 = 1.0F
' Green
myColorMatrix.Matrix22 = 1.0F
' Blue
myColorMatrix.Matrix33 = 1.0F
' alpha
myColorMatrix.Matrix44 = 1.0F
' w
' Create an ImageAttributes object and set the color matrix.
Dim imageAttr As New ImageAttributes
imageAttr.SetColorMatrix(myColorMatrix)
' Draw the image using the color matrix.
Dim rect As New Rectangle(100, 20, 200, 200)
e.Graphics.DrawImage(myImage, rect, 0, 0, 200, 200, _
GraphicsUnit.Pixel, imageAttr)
' Image
End Sub
'SetColorMatrixExample
示例2: RotateColors
Private Sub RotateColors(ByVal e As PaintEventArgs)
Dim image As Bitmap = New Bitmap("RotationInput.bmp")
Dim imageAttributes As New ImageAttributes()
Dim width As Integer = image.Width
Dim height As Integer = image.Height
Dim degrees As Single = 60.0F
Dim r As Double = degrees * System.Math.PI / 180 ' degrees to radians
Dim colorMatrixElements As Single()() = { _
New Single() {CSng(System.Math.Cos(r)), _
CSng(System.Math.Sin(r)), 0, 0, 0}, _
New Single() {CSng(-System.Math.Sin(r)), _
CSng(-System.Math.Cos(r)), 0, 0, 0}, _
New Single() {0, 0, 2, 0, 0}, _
New Single() {0, 0, 0, 1, 0}, _
New Single() {0, 0, 0, 0, 1}}
Dim colorMatrix As New ColorMatrix(colorMatrixElements)
imageAttributes.SetColorMatrix( _
colorMatrix, _
ColorMatrixFlag.Default, _
ColorAdjustType.Bitmap)
e.Graphics.DrawImage(image, 10, 10, width, height)
' Pass in the destination rectangle (2nd argument), the upper-left corner
' (3rd and 4th arguments), width (5th argument), and height (6th
' argument) of the source rectangle.
e.Graphics.DrawImage( _
image, _
New Rectangle(150, 10, width, height), _
0, 0, _
width, _
height, _
GraphicsUnit.Pixel, _
imageAttributes)
End Sub
示例3: SetColorMatrix
' 导入命名空间
Imports System.Drawing.Imaging
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class SetColorMatrix
public Shared Sub Main
Application.Run(New Form1)
End Sub
End class
public class Form1
Inherits System.Windows.Forms.Form
Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)
Dim g As Graphics = Me.CreateGraphics()
g.Clear(Me.BackColor)
Dim rect As New Rectangle(20, 20, 200, 100)
Dim bitmap As New Bitmap("yourfile.jpg")
Dim ptsArray As Single()() = {New Single() {1, 0, 0, 0, 0}, New Single() {0, 1, 0, 0, 0}, New Single() {0, 0, 1, 0, 0}, New Single() {0, 0, 0, 0.5F, 0}, New Single() {0, 0, 0, 0, 1}}
Dim clrMatrix As New ColorMatrix(ptsArray)
clrMatrix.Matrix34 = 0.8F
clrMatrix.Matrix11 = 0.3F
Dim imgAttributes As New ImageAttributes
imgAttributes.SetColorMatrix(clrMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap)
g.FillRectangle(Brushes.Red, rect)
rect.Y += 120
g.FillEllipse(Brushes.Black, rect)
g.DrawImage(bitmap, New Rectangle(0, 0, bitmap.Width, bitmap.Height), 0, 0, bitmap.Width, bitmap.Height, GraphicsUnit.Pixel, imgAttributes)
g.Dispose()
End Sub
Public Sub New()
MyBase.New()
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(292, 273)
Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
End Sub
End Class