GDI+ Bitmap size limitation?

[Metaspace]

It seems that bitmaps of the GDI+ Bitmap class are limited to a size of 32767 pixels in either direction (width, height).
I use Visual C++ 6.0 with latest patch, plus Platform SDK.

This limit is not documented, and I have not found anything on the topic on the net; all I did find was that GDI+ is supposed to overcome any previous short-int limitations (e.g., GDI display surface).

In the attached demo application (see CTest_bmpView::OnDraw), if 32768 or a larger value is used for the width or height of the GDI+ bitmap, although creation of the bitmap and operations on it (e.g., FillRectangle) are successful, display (using Graphics::DrawImage) or saving (Bitmap::Save) fail, with status code InvalidParameter and Win32Error, respectively.
Additional error information obtained using ::GetLastError is useless ("Operation Successful").

Has anyone encountered this problem, or even better, knows how to overcome it? Would also appreciate the odd report of reproducibility.

[Metaspace]

I'd also be interested whether anyone can reproduce this problem with a newer environment, e.g., DevStudio 200X.

Thanks in advance!

[Metaspace]

Anyone?

[Xiphias]

That's a pretty big bitmap...
i think you're right in that it might be limited to a signed short in either direction.
which limits the maximum size of a bitmap to slightly below 24 gigabytes.

32767 * 32767 * 24 (bits pr pixel) = 25768230936 bytes
25768230936 / 1024^3 = 23.998535

now I'm not saying you'll never need that big bitmaps, i'm just saying that if you need a bitmap that big, you'll probably need to implement it yourself..

just out of curiousity, what are you using it for?

[Metaspace]

Nobody spoke of using a bitmap with size 2^15 X 2^15;

I need to display some wich may be up to a few tens of thousands of pixels high (displayed in a scrollable view), but only a few dozen pixel wide.
Used for some exotic legends in map display.

Of course there are workarounds (which I do find awkward, especially after Microsoft boasted about overcoming 16bit limitiations with GDI+)

Thx for answering,

-Metaspace