all groups > dotnet drawing api > may 2005 > threads for may 22 - 28, 2005
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How come Image.FromFile() member function is not avaiable?
Posted by Gravity at 5/28/2005 12:00:00 AM
Hi,
Refering to the title, I am using Visual Studio .NET 2003, WInXP Pro SP2 to
develop C# on PocketPC.
To me surprise, I cannot locate the member function, FromFile( ) from the
System.Drawing.Image class.
My VS only show 8 members functions from the class;
(1) Dispose
(2) Equal
(3) ... more >>
Error in Replace Colors In Image and Save it!
Posted by Prasad Dannani at 5/28/2005 12:00:00 AM
Hi,
I created a Windows Application which accepts the filename to open and two
color values.
The Application opens the given bitmap file and replaces the first color
with second color. I done by traversing through the pixels.
After completing the whole process i have to save the image to ... more >>
Saving Grayscale image as real grayscale
Posted by bert at 5/27/2005 12:00:00 AM
I want to save an image which I converted to grayscale as a real
grayscale image.
When I save the image and open it in photoshop, the mode is RGB
color/ 8bit.
I want the mode to be grayscale.
I've been searching for a solution for my problem for some time now
but I can't seem to find an ... more >>
Invalidating a region and having only that region drawn
Posted by Andrew at 5/26/2005 6:57:01 PM
Hello,
In my application I perform all the drawing operations from within the form's
OnPaint method (the form is ultimately a TabPage derivative) ie
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
//the base class LayerView.OnPaint handles things like AutoScr... more >>
Handling "hide underlined letters until I press ALT" setting
Posted by Scott McChesney at 5/25/2005 11:13:41 AM
Folks -
I've done some Google searches and come up with nothing. If this has been
addressed already, please point me in the right direction.
I'm creating a custom Label control for one of my projects, so I can utilize
text trimming. I'm inheriting from a standard Label control and overri... more >>
onPaint handler
Posted by YYZ at 5/25/2005 11:13:31 AM
Is there anyway to get an onPaint handler for a textbox?
In VB 6 I would subclass the control (never done it with a textbox, but I
think it would have worked), but I don't think I can do that here in .Net.
Matt
... more >>
Scrolling again
Posted by Steve Magoon at 5/24/2005 12:38:58 PM
Hey,
Could someone help me with the following code? I would like ObjectB to
remain stationary on the panel while scrolling ObjectA, but I can't figure
out how to do it. If I'm saving the Graphics state, it seems to me that any
scrolling should not affect ObjectB when I draw it, but only Obj... more >>
Bitmaps and graphics
Posted by Bilal Abbasi at 5/24/2005 12:30:14 AM
Is there a way to create a Bitmap object and draw strings within it.
Graphics g = pic1.CreateGraphics();
Bitmap b = new Bitmap(100,100, g);
does not work.
Or
do I have to get into the nitty gritties of the Font object find the
position of each pixel in it and use the SetPixel method???
... more >>
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Complex Shapes Over other Windows (I can see it being done!)
Posted by Phil Jones at 5/24/2005 12:00:00 AM
Has anyone seen a widget app called "Konfabulator" (www.konfabulator.com).
Interestingly enough it renders the new mac Tiger widgets on a Windows PC.
What's most interesting is that the widgets are complex, semi-transparent
shapes that reveal the windows and desktop behind them (for instance ... more >>
Appending one image to other
Posted by Saurabh at 5/24/2005 12:00:00 AM
Hello All,
I am new to the image processing things, hence this question might be a bit
silly but I could not find any obvious solution....
I have an image object which is to be shown in a picturebox. The picturebox
can actually change the size depending on the anchor / docking of the form.... more >>
Copying Vector Image
Posted by Mike King at 5/23/2005 12:01:02 PM
I have created a .NET control, and I want to add the ability to copy/paste
the image of the control to MS Word. The tricking thing is that I want the
vector image not a bitmap. Does anyone know how to do that?
Bitmap PlotBitmap = new Bitmap(500, 500);
Metafile mfile = (Metafile) ((Image)... more >>
GDI+ Flat API, High-Resolution Drawing?
Posted by george NO[at]SPAM neosoft.com at 5/23/2005 11:11:33 AM
Using the GDI+ Flat API, I am able to draw at 96dpi resolution to a VB6
PictureBox control, and (awkwardly) dump the image to gdi+ supported
file formats, like tif.
I need to create higher resolution (say 360dpi) tif files. It seems
that .Net can create a high-resolution, in-memory bitmap obj... more >>
GDI+ Flat API, Odd Issue with Dash and Smoothing
Posted by george NO[at]SPAM neosoft.com at 5/23/2005 11:01:06 AM
I'm using the GDI+ flat API version 5.1.3102.2180 (latest/good version?
The SDK shows 5.1.3102.1360!). When I attempt to set smoothing to
anything other than AntiAlias, while using a dash pattern other than
solid AND the pen width is 1 pixel wide, the pattern is in inches
rather than in pixels... more >>
exception while Creating a bitmap from xml file
Posted by jay jay via .NET 247 at 5/23/2005 10:16:12 AM
Hi,
I am trying to create a image from an xml file. Xml file has string representation of a image.
here is the code snippet:
DataSet ds=new DataSet();
ds.ReadXml("Northwind.xml");
string pic=ds.Tables[1].Rows[0][3].ToString();
byte[] str=Encoding.UTF8.GetBytes(pic);
MemoryStream s... more >>
Problem using GraphicsPath
Posted by Richard L Rosenheim at 5/23/2005 7:56:43 AM
When I use the following code:
myFont = new Font("Tahoma", 24, System.Drawing.GraphicsUnit.Point);
GraphicsPath pth = New GraphicsPath();
pth.AddString("Sample", myFont.FontFamily, (int)myFont.Style,
myFont.Size, new Point(x, y), StringFormat.GenericTypographic);
... more >>
3D transformation
Posted by Lebesgue at 5/23/2005 12:00:00 AM
Is it possible to "emulate" 3D transformation using GDI+ somehow?
I would like to rotate a string around vertical axis.
I know how to apply rotation transform to Graphics object, but only as 2D
transform.
I think this will not be possible directly, but hope there is a chance to do
it using some... more >>
Create Bitmap from byte[]
Posted by Ondrej Sevecek at 5/23/2005 12:00:00 AM
Hello,
I have a byte[] array containing values of 0-255 representing gray levels of
a picture. This has no common format (.bmp, .jpg, ...) it only stores the
bytes, one per a pixel.
I converted it from original matrix byte[,] so I know its real dimensions.
Now, I would like to display thi... more >>
Scroll panel image
Posted by Leif Eirik Olsen at 5/23/2005 12:00:00 AM
Hi all,
On a panel where I initially draw a Line, I would like to :
Copy the image of the Panel
Rewrite the copied image back to the same panel, but 1 pixel to the left of
it origin position.
Feel like I've tried everyting, but nothing seems to be correct. I'm sure
I'm missing something ob... more >>
DrawImage and ImageAttributes to show pixelized scaled bitmap
Posted by Ondrej Sevecek at 5/23/2005 12:00:00 AM
Hello,
I have a bitmap. I use DrawImage() method to show the bitmap. It can scale
the picture according to the destination rectangle..
DrawImage(
image,
scaleToRectangle,
0, 0, imageWidth, imageHeight,
Pixel,
imageAttributes
);
The scaled picture is smooth and its origin... more >>
Invalid parameter used exception while creating bitmap
Posted by jay jay via .NET 247 at 5/22/2005 2:04:24 AM
Hi,
I am trying to create a image from an xml file. Xml file has string representation of a image.
here is the code snippet:
DataSet ds=new DataSet();
ds.ReadXml("Northwind.xml");
string pic=ds.Tables[1].Rows[0][3].ToString();
byte[] str=Encoding.UTF8.GetBytes(pic);
MemoryStream s... more >>
Same Error
Posted by jay jay via .NET 247 at 5/22/2005 12:08:55 AM
(Type your message here)
--------------------------------
From: jay jay
hi got the same error,
byte[] imByte=Convert.FromBase64String(Imagetext);
Bitmap b = (Bitmap)Bitmap.FromStream( new MemoryStream(imByte)); // This line is throwing error.
Somebody please help me.
---------------... more >>
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