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wined3d: Detect vertex shader 2.0 support using a pixel shader 2.0 limit. 

Without this vertex shader 3.0 is reported on non-Nvidia cards that
only support vertex shader 2.0. Reporting 3.0 would result in slow
software rendering as it is much more advanced than 2.0.
This commit is contained in:
Roderick Colenbrander 2007-10-27 23:54:10 +02:00 committed by Alexandre Julliard
parent 6760ce83a4
commit efc18d79af
1 changed files with 7 additions and 4 deletions
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11
dlls/wined3d/directx.c
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@ -2367,10 +2367,13 @@ static HRESULT WINAPI IWineD3DImpl_GetDeviceCaps(IWineD3D *iface, UINT Adapter,
if (vs_selected_mode == SHADER_GLSL) {
/* Nvidia Geforce6/7 or Ati R4xx/R5xx cards with GLSL support, support VS 3.0 but older Nvidia/Ati
models with GLSL support only support 2.0. In case of nvidia we can detect VS 2.0 support using
vs_nv_version which is based on NV_vertex_program. For Ati cards there's no easy way, so for
now only support 2.0/3.0 detection on Nvidia GeforceFX cards and default to 3.0 for everything else */
if(GLINFO_LOCATION.vs_nv_version == VS_VERSION_20)
* models with GLSL support only support 2.0. In case of nvidia we can detect VS 2.0 support using
* vs_nv_version which is based on NV_vertex_program.
* For Ati cards there's no way using glsl (it abstracts the lowlevel info away) and also not
* using ARB_vertex_program. It is safe to assume that when a card supports pixel shader 2.0 it
* supports vertex shader 2.0 too and the way around. We can detect ps2.0 using the maximum number
* of native instructions, so use that here. For more info see the pixel shader versioning code below. */
if((GLINFO_LOCATION.vs_nv_version == VS_VERSION_20) || (GLINFO_LOCATION.ps_arb_max_instructions <= 512))
*pCaps->VertexShaderVersion = WINED3DVS_VERSION(2,0);
else
*pCaps->VertexShaderVersion = WINED3DVS_VERSION(3,0);