DirectDraw provides device independence through the DirectDraw driver. The DirectDraw driver is a device-specific interface usually provided by the display hardware manufacturer. DirectDraw exposes methods to the application and uses the DirectDraw portion of the display driver to work directly with the hardware. Applications never call the display driver directly.
Under Windows 2000 and later, the DirectDraw driver is always implemented as 32-bit code. The DirectDraw driver can be part of the display driver or a separate DLL that communicates with the display driver through a private interface defined by the driver writer. The DirectDraw documentation assumes that under Windows 2000 and later, the DirectDraw driver is part of the display driver.
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The DirectDraw driver contains only device-dependent code and performs no emulation. If a function is not performed by the hardware, the DirectDraw driver does not report it as a hardware capability. Additionally, the DirectDraw driver does not validate parameters because the DirectDraw runtime does this before the driver is invoked.
I think your problem is simply that SC4 doesn't recognise your new card and until you can find the right settings for your graphics rules/video cards sgr files it simply won't be able to. Bear in mind just because your old GPU and it's drivers supported SC4 well does not mean that the newer card will also, it may be that some driver support was changed that affects this.
There are a lot of problems you can run into with older games and newer equipment, it may be worth trying some older versions of the NVidia drivers. If that doesn't help it could simply be that the drivers/hardware just don't play very nicely with SC4, in which case you may be restricted to Software Rendering if OpenGL doesn't work. Some changes have been going on with WDDM drivers and how they communicates with DirectX, the downside to this is that somewhere a backwards compatibility layer that SC4 needs from DirectX is removed. If this is the case and you can't find an older driver as a workaround you may not be able to do anything about it. Such problems seem more prevalent on Windows 8/8.1 systems and with certain newer graphics chips.
Open GL still renders everything very strangely (world appears as white and all sprites appear with black boxes around them). I've rolled the Nvidia driver back to the first one compatible with the 980 (which i swear worked with the game when I first purchased the card this October).
Don't rely totally on Windows to do your driver roll backs, if you've got one try the disc that came with the card for an older driver, usually they aren't that up to date when shipped and will be the first one most people install. After that try Nvidia's webpage or do some searching on google, usually you can find most old driver versions.
Since you can't even initialise Direct X in the first place your problem has to reside with the drivers ability to support the older DX modes that SC4 needs to utilise, so if it worked before then you should be able to get it going again.
A fresh driver install will most likely fix it. DirectDraw failing is generally due to a driver issue. Did you uninstall the drivers when you upgraded the card from your 760? And also, this might be an important question: do any other games work?
I've used Geforce Experience as my primary way of keeping up to date with GPU drivers. While I was still using the 760 in September-October before I got the 980, the drivers with support for the 980 had already been installed. It was pretty much plug & play when I installed the newer card. When I first installed the card I went through pretty much everything in my steam library just to screw around with maxing out the graphics, didn't run into any issues. At the current time I haven't seen any other issues as well (there have been a handful of driver updates since then).
I helped a close friend build a PC just a few weeks after picking up my 980 using relatively similar hardware (i5-4690k & GTX 970), and he's been running the game with no issue using that 970 (which I believe shares a variant of the GM204 chip with the 980). As a test as well, I just had him make sure his drivers were all up to date and the game ran with no direct draw issues. (This is where the fresh OS install thought came about, its also a good excuse to switch to a small SSD).
The final solution to the Windoze problem is to dual boot a Linux distribution and run the game under control of the Linux/wine layer. The windows decor can be freely chosen with this method, and your hardware is automatically recognized by the Linux kernel and the appropriate drivers loaded. Linux is the Swiss army knife of operating systems.
Since your problems lie with DriectX, perhaps a Windows install will get things back to where they were, it is possible some update you've not paid any attention to has caused this. Something has changed the drivers or DirectX in a way that removes something SC4 needs to run under DirectX. Since you can't technically re-install DirectX, a fresh Windows install with very careful application of updates and selection of the graphics drivers used may indeed make a difference.
One thing you need to keep in mind, more than likely whatever stopped SC4 working will also allow your spangly new GPU to work better with all the newer stuff, somewhere you will probably have to compromise. Since you've an SSD to install anyway, you'd have nothing to loose (except some time) if you unplugged your existing drive and tested a new Install on the SSD without the other drive there. If you get SC4 working this way, you can decide how to set up your system going forwards, but I'd be very careful to keep copies of any working drivers somewhere safe thereafter (maybe image the drive at this point too). I'm using an i7 4770 with a GTX 750ti on Win7 and driver version 340.52 which I believe is the latest version, it seems to be the higher end cards (and Win 8/8.1) where this problem resides from what I'm seeing on the forums - frankly bought my system for SC4 and I take great care to ensure I can go back before installing GPU driver updates, Windows Restore is your friend here.
I've been on various Linux distributions since Vista came out, and while some of the distros do, in fact, represent the attitude you describe, I have settled on Ubuntu because it does not have this attitude and runs my stuff doing what I want. Considering that my GPU is no longer supported by the manufacturer (AMD) on the current Linux kernel, I am able to run SC4 with hardware (DirectX) support using an alternative driver supplied automatically by the distribution with no input on my part.
rsc204 & A Nonny Moose, I really appreciate your advice over the last few days. As for now I'll be mildly content with the software rendering method, and will look further into Linux into the meantime perhaps as a viable long-term option. (as well as an SSD, they're so inexpensive now for 128 and 256GB capacities that I may as well down the road)
First of all, my initial approach to this problem is partially documented at the end of the readme on GitHub. It may still work for Deadlock 2, but it was suffering from heavy GDI resource leaks in StarCraft so I abandoned that approach. It seems like some of the ReleaseDC calls were not being caught by hotpatching - perhaps being called only internally by some kernel mode driver like win32k.sys. Unfortunately the leak was heavy enough that it even broke my desktop rendering after a longer test session (even after exiting the game) and the only way to recover was to log off from my Windows account. (Strange, I thought the number of GDI handles is nowadays only limited by system memory, at least according to some docs I remember reading... maybe something else was broken and the problem wasn't caused by the leak?). I couldn't think of a good enough solution for this (I know next to nothing about kernel hooking) so I changed approach for the upcoming v0.2.0 version.
Something similar may actually be available for OpenGL too, as there seems to be a function in WDDM that does exactly this (D3DKMTCreateDCFromMemory: -us/library/windows/hardware/ff546826(v=vs.85).aspx). In fact, the DirectDraw implementation may actually be using this when suitable drivers are available, as you can find this function in ddraw.dll's import table.
An outdated or corrupt video card driver can also lead to DirectDraw Error dderr_unsupported in Windows 11/10 when playing legacy games. To fix it, you should update your graphics card driver to the latest version.
There are still a surprising number of really old machines out there with crappy/non-existent 3d acceleration and drivers that have never been updated, such that using DirectDraw is still going to be way faster than OpenGL or D3D. I experienced this while working on a 2d multiplayer game that is about 10 years old now when I tried to write a new rendering backend in OpenGL to support other platforms. A lot of players reported that the OpenGL mode was unplayable due to low frame rates. I would also agree with the Brazilian poster that this is more common outside of the US and Europe, but it's still true in those places as well.
Regular, inexpensive drivers will not be able to help you without applying additional programming effort. What you need is a real graphics processing chip like the FT81X or BT81X, they work in AVR, ARM and STM32, with some limitations in ESP32, but that can be solved using images in the form of cell arrays; It could also be feasible the series of industrial displays that have appeared lately with drivers for Arduino, or perhaps some chips from 4D systems. This particular type of display requires an extra investment, which in the end is worth considering.
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