This bug report was migrated from our old Bugzilla tracker.

Reported in version: HG 2.0
Reported for operating system, platform: Windows (All), x86

Comments on the original bug report:

On 2011-11-29 12:28:02 +0000, Ellie wrote:

Direct3D renderer should set D3DCREATE_FPU_PRESERVE for not behaving vastly different to OpenGL/software rendering on doubles and break some libraries really badly.

Most notable affected example: Lua, which does the most unpredictable things which are really almost impossible to debug/find out for beginners who never heard this culprit exists.

Since I believe all renderers should behave the same on that doubles simply work as expected in a program, this should really be changed! (also this wasted a few days of my life wondering why everything in my program was so broken)

Please change src/render/direct3d/SDL_render_direct3d.c:441 from:

result = IDirect3D9_CreateDevice(data->d3d, data->adapter,
D3DDEVTYPE_HAL,
pparams.hDeviceWindow,
(caps.
DevCaps &
D3DDEVCAPS_HWTRANSFORMANDLIGHT) ?
D3DCREATE_HARDWARE_VERTEXPROCESSING :
D3DCREATE_SOFTWARE_VERTEXPROCESSING,
&pparams, &data->device);

to:

result = IDirect3D9_CreateDevice(data->d3d, data->adapter,
D3DDEVTYPE_HAL,
pparams.hDeviceWindow,
D3DCREATE_FPU_PRESERVE | ((caps.
DevCaps &
D3DDEVCAPS_HWTRANSFORMANDLIGHT) ?
D3DCREATE_HARDWARE_VERTEXPROCESSING :
D3DCREATE_SOFTWARE_VERTEXPROCESSING),
&pparams, &data->device);

Please note this currently makes any accelerated (non-software) SDL Texture renderers inoperable in Lua applications on some Windows configurations in combination with bug # 1331

Of course there might be other ways to fix this I am not aware of, I am not a Windows/Direct3D guru. But if you can't think of any, please take this route soon.

On 2011-12-20 23:13:18 +0000, Ellie wrote:

Any chance we can get this added soon? It's such a little change, yet meaning much e.g. to Lua applications (for which this bug is somewhat of a blocker).

On 2011-12-29 02:18:38 +0000, Sam Lantinga wrote:

Fixed, thanks!
http://hg.libsdl.org/SDL/rev/d4621a7e0faa