1998-03-29 21:44:57 +02:00
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This file contains information on the current implementation of the DirectDraw
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1999-01-03 18:00:19 +01:00
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API. Information specific to Direct3D is in the direct3D file.
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1998-03-29 21:44:57 +02:00
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The DirectDraw API is being used in a lot of current computergames. Its API
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layer is represented by the functions in the Win32 DLL ddraw.dll and the
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IDirectDraw* interfaces (that can be created using the API functions).
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WINE currently implements a very basic set of the DirectDraw functionality
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in graphics/ddraw.c. This implementation uses the XFree86-DGA extension
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to get very fast access to the graphics card framebuffer and doublebuffering
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features. It is as fast as the MS equivalent for the stuff that is implemented.
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Several applications already work, see below.
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Problems of the implementation using XFree86-DGA:
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- XFree86 cannot switch resolution nor depth on the fly.
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This is a problem with X and unavoidable.
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Current solution is to pop up a MessageBox with an error for
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mismatched parameters and advice the user to restart the X server
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with the specified depth and/or screensize.
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- The rest of the functionality that has to be implemented will have
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to be done in software and will be very slow.
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- This requires WINE to be run as root user so XF86DGA can mmap the
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framebuffer into the addressspace of the process.
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- Blocks all other X windowed applications.
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Status:
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- Diablo [640x480x8]:
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The movies play with speed comparable to the MS DDRAW one.
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The game doesn't work, it somehow tries to write into 2 lines _BEFORE_
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the start of the surface. I have tried to investigate this, but it is
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in code that is automatically generated.
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- WingCommander 4 / Win95 Patch [640x480x8]:
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The intromovie plays, in 8 bit mode (to reconfigure wc4, run wine
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"wc4w.exe -I"). The 16bit mode looks broken on Mystique, but I think
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this is due to the unusual colorweight (565 rgb) of the Mystique in 16bit
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mode. [Specifying it in DDPIXELFORMAT didn't help.]
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Requires to be run in 640x480xdepth mode (doesn't seem to heed
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DDSURFACEDESC.lPitch).
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You can even fly the first mission with Maniac (ignore the weird sounds),
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but it crashes as soon as you arrive at Blue Point Station...
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- Monkey Island 3 [640x480x8]:
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1998-11-22 13:33:29 +01:00
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WINE-CVS-981116:
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Works, using DGA and Xlib. (Mousecontrol is a bit off in windowed mode.)
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1998-03-29 21:44:57 +02:00
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- DiscWorld 2 [640x480x8]:
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Plays through nearly all intro movies. Sound and animation skip a lot of
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stuff (possible DirectSound asynchronization problem).
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- XvT [640x480x16]:
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Shows the splash screen, then fails with missing Joystick. I have
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investigated but failed to find a reason for this.
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- Tomb Raider 2 Demo (using 8 bit renderer) [640x480x8]:
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I have played nearly all of the DEMO level using Keyboard Controls.
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Sound is a bit weird. Keyboard/Mouse handling too due to incomplete
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DirectInput.
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- WingCommander Prophecy Demo (using software renderer) [640x480x16]:
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Plays trailer, hangs in selection screen (no keyboard input, DirectInput
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problem).
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