tritriada.blogg.se

1. #Php image resize on the fly how to
2. #Php image resize on the fly code

But the user has to know whichever method u r using and has to operate on the new size returned in the same manner.

Put the width into a long (or ulong), shift it left 16 times and or it with ur height and return a single ulong which has both parameters as sort of packed into one variable. Or u can use a structure to do that.Īs a non nice hack u can mask upper 16 bits of width and height, unless u r working with images which may have a size more than 65535, which is unlikely. Its bool and so is checkbox so that gets done automatically.Ībout returning w & h back to caller, we can not return 2 values, so to do that u might create an array with 2 elements and put width height into array and return it.

While calling the resize, use your checkbox status as last parameter. The preserveAspectRatio would probably be a check box in you code.

#Php image resize on the fly how to

I'm not a vb person but I can suggest the idea and u can see how to do it in vb. In this example, I simply read the original image from disk and then save the resized image to a MemoryStream for use later in the application: We can then call the method at an appropriate point to resize the image. GraphicsHandle.DrawImage(image, 0, 0, newWidth, newHeight) GraphicsHandle.InterpolationMode = InterpolationMode.HighQualityBicubic

Using graphicsHandle As Graphics = Graphics.FromImage(newImage) NewHeight = CInt(originalHeight * percent)Įnd If Dim newImage As Image = New Bitmap(newWidth, newHeight)

#Php image resize on the fly code

Copy Code ' Visual Basic Public Shared Function ResizeImage( ByVal image As Image, _īyVal size As Size, Optional ByVal preserveAspectRatio As Boolean = True) As Imageĭim newWidth As Integer Dim newHeight As Integer If preserveAspectRatio Then Dim originalWidth As Integer = image.Widthĭim originalHeight As Integer = image.Heightĭim percentWidth As Single = CSng(size.Width) / CSng(originalWidth)ĭim percentHeight As Single = CSng(size.Height) / CSng(originalHeight)ĭim percent As Single = If(percentHeight < percentWidth,