Why don't Direct2D and DirectWrite use traditional COM objects?

Posted by David Brown on Stack Overflow See other posts from Stack Overflow or by David Brown
Published on 2010-05-14T21:53:39Z Indexed on 2010/05/14 23:34 UTC
Read the original article Hit count: 585

Filed under:

direct2d

|

directwrite

|

com

|

c#

|

.NET

I'm toying with a little 2D game engine in C# and decided to use Direct2D and DirectWrite for rendering. I know there's the Windows API Code Pack and SlimDX, but I'd really like to dig in and write an interface from scratch. I'm trying to do it without Managed C++, but Direct2D and DirectWrite don't appear to use traditional COM objects. They define interfaces that derive from IUnknown, but there appears to be no way to actually use them from C# with COM interop. There are IIDs in d2d1.h, but no CLSID.

Of course, I'm really new to COM interop, so perhaps I'm just missing something. Can someone shed some light on this situation?

© Stack Overflow or respective owner

Related posts about direct2d

Direct2D fallback to GDI in XP

as seen on Stack Overflow - Search for 'Stack Overflow'
I'd like to use Direct2D for my .Net application using the Windows Code pack. Since some of my users are using XP, I need to provide a GDI+ fallback. I wonder how people usually do this kind of fallback. Do they abstract/interface all the necessary graphics feature into some custom generic library… >>> More
Learning Direct2D

as seen on Stack Overflow - Search for 'Stack Overflow'
I have some experince creating windows controls in GDI and now I'm looking for good resources (APIs, samples & good practices) to start learning about Direct2d. >>> More
Where to start with Direct2d?

as seen on Stack Overflow - Search for 'Stack Overflow'
Interested in learning Direct2d to create a Windows 8 app, but after 2 hours of research I'm thoroughly confused. Samples like this (Creating a Simple Direct2D Application) seem to assume you know what an HWND and HRESULT is, and how the Windows API works in general. My question is this: do you need… >>> More
How can I obtain a HBITMAP or HICON from a Direct2D bitmap?

as seen on Game Development - Search for 'Game Development'
Is there any way to obtain a HBITMAP or HICON from a ID2D1Bitmap * using Direct2D? I am using this function to load the bitmap. The reason I ask is because I am creating my level editor tool and would like to draw a PNG image on a standard button control. I know that you can do this using GDI+: HBITMAP… >>> More
C++ Direct 2D How To Resize ID2D1Bitmap

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm making myself a simple GUI library for a game I'm making and each control needs to have a Bitmap to draw to when the control needs redrawing. When it does not need to be redrawn, it will have an already made bitmap ready to display to the screen. Since controls can be resized, this Bitmap also… >>> More

Related posts about directwrite

DirectWrite Producing Strange Artifacts?

as seen on Game Development - Search for 'Game Development'
I've written the basis to my UI system around Direct2D. I like it because it's fast and easy to use (even if I had to do some messy work to get it to work with DirectX11). However, I notice when using DirectWrite I'm getting strange problems with my text. As you can see, the e is a little screwwed… >>> More
Why don't Direct2D and DirectWrite use traditional COM objects?

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm toying with a little 2D game engine in C# and decided to use Direct2D and DirectWrite for rendering. I know there's the Windows API Code Pack and SlimDX, but I'd really like to dig in and write an interface from scratch. I'm trying to do it without Managed C++, but Direct2D and DirectWrite don't… >>> More
Directx and Open Libraries list? [closed]

as seen on Game Development - Search for 'Game Development'
I've just been looking for comparissons between open and proprietary frameworks and libraries. More so just to get an idea of what exists than how they compare. For example: We have DirectX (graphics) and its open counterpart OpenGL DirectX (sound) and OpenAL But there are other DirectX libraries… >>> More
Why is firefox 4 not HW accelerated?

as seen on Super User - Search for 'Super User'
At first i thought it was my computer but then i tried chrome. Why isnt firefox not hardware accelerated? The first screenshot shows chrome at 23% usage. The 2nd shows 59%. I have 2 cpus which is why it isnt 100% usage. The game pictured is biolab Heres the text for about:support Application… >>> More