I'm writing a simple slideshow app and want to use fade-in
transitions, alpha blending the next image from 0-100% opacity, on top
of the current image.  Seems like it should be simple enough to do
using ColorMatrix.Matrix33 and ImageAttributes.SetColorMatrix to set

Bitmap class have a constructor Bitmap(int width, int height), so it
is possible to create a Bitmap object with the given dimension, and
then you can manipulate it later.
Now my work need co create enough much big Bitmap, but I don't know

It seems that GDI+ converts bitmaps to 32bpp when it loads them
for processing. Though I needs only 4bpp images, the resulting bitmaps
occupies 8 times more memory. And if bitmaps have very large sizes,
the web server hangs. Are there any image processing library/modules

Hello team,
I've hit a brick wall. Here's what I'm tying to achieve:
When i save images to my webserver i also save a thumbnail using
(Bitmap bitmap = new Bitmap(image, ThumbnailWidth, ThumbnailHeight)).

I am having some trouble with the AddMemoryFont method. I am trying to
embed an OpenType font but it keeps giving me the following:
System.InvalidOperationException: Error loading font --->
System.IO.FileNotFoundException: File not found.

I have created a program which displays a raster image and allows the
user to zoom in on it to see detail.  However as it stands now, when
you zoom in on the image you limit viewable area of it.  In other
words, you cannot scroll up and down or left and right, and view the

I have a small application that reads a multipage TIFF (thanks Bob Powell!)
and then simply rewrites the pages to a new TIFF file.  It doesn't do
anything to it except extract the pages and then reassemble them into a new
file.  The problem is that the new file is 778kb and the ...

Has anybody already run a GDI+ heavy project under framework 3.0?
I was under the impression that framework 3.0 would  pipe the GDI+
commands through WPF and thus through DirectX. And thus have some
hardware support.

Is there a way in GDI+ to draw image with perspective warp?
There is a way to have perspective warp on GraphicsPath, but I can't find a
way to draw image like that.
Thanks.

I hope someone can help.
I need to be able to draw a freehand line (which I am doing at present in a
picturebox), which is easy enough using a GraphicsPath.... however, I am
stuck at the second part of my requirements, which is to record how large

One reads an image from a file that has, maybe, a resolution of 300 PPI.
And another image that is 600ppi.
And Draw them it onto a PictureBox.Image that has a 96ppi resolution.
How does one go about maintaining the correct size (inches)

I want to draw a rectangle with color changing in both directions.
for example:
(0,0)= 0,0,0   ..    (.5,.5)=0,0,128   ..    (1,1)=0,0,255
...

What is the best way to draw a checkerboard of 10x10 pixels on a form.
I could brut force it  but I imagine there is a better way.
The background is already white so I need only draw the black squares.
Thanks in advance

exact code:
try
{
   Bitmap err_bmp = new Bitmap(200, 50, PixelFormat.Format16bppRgb555);

How can I draw dynamic diagram with gdi+
I want to draw a live diagram. I have to draw sine(sinus) like diagrams that
changes by time. It slides every second a pixel left to right. I made it
with setpixel() and arrays but it requires more and more memory.