Prev: how to Automatically select next item in listbox
Next: Control Paper size in Crystal Report Viewer
From: Ricardo Furtado on 11 Dec 2007 04:53
I'm using OpenGL in Visual Basic .net 2005 and i need to use the following
function

glBitmap(width as integer,height as integer, xorig as single, yorig as
single, xmove as single, ymove as single, bitmap as System.InPtr)

or

glBitmap(width as integer,height as integer, xorig as single, yorig as
single, xmove as single, ymove as single, bitmap() as byte)

I've been looking for a way to pass an array of bytes or a pointer to an
image, in visual basic .net but i don't seem to find it.
either if i use an image
Dim imgToPtr As Image = Image.FromFile("C:\TestImage.jpg")

or a bitmap
Dim bmpTest As Bitmap = New Bitmap("C:\TestImage.jpg")

i can't find a way to convert it to a pointer or an array of bytes.

Can you help?

My thanks in advanced

Ricardo Furtado
From: Armin Zingler on 11 Dec 2007 07:49
"Ricardo Furtado" <RicardoFurtado(a)discussions.microsoft.com> schrieb
> I'm using OpenGL in Visual Basic .net 2005 and i need to use the
> following function
>
> glBitmap(width as integer,height as integer, xorig as single, yorig
> as single, xmove as single, ymove as single, bitmap as System.InPtr)
>
> or
>
> glBitmap(width as integer,height as integer, xorig as single, yorig
> as single, xmove as single, ymove as single, bitmap() as byte)
>
> I've been looking for a way to pass an array of bytes or a pointer
> to an image, in visual basic .net but i don't seem to find it.
> either if i use an image
> Dim imgToPtr As Image = Image.FromFile("C:\TestImage.jpg")
>
> or a bitmap
> Dim bmpTest As Bitmap = New Bitmap("C:\TestImage.jpg")
>
> i can't find a way to convert it to a pointer or an array of bytes.
>
> Can you help?

Have a look at the Bitmap's LockBits function. The Scan0 property of the
returned object might be what you're looking for. I don't know if the
function expects any header.


Armin

 | 
Pages: 1
Prev: how to Automatically select next item in listbox
Next: Control Paper size in Crystal Report Viewer