wined3d: Use shader and fragment capabilities to select d3d level

[Henri Verbeet]

On 23 June 2014 21:10, Andrei Slăvoiu <andrei.slavoiu at gmail.com> wrote:
> +static UINT d3d_level_from_gl_info(const struct wined3d_gl_info *gl_info)
> +{
> +    struct shader_caps shader_caps;
> +    struct fragment_caps fragment_caps;
> +    const struct wined3d_shader_backend_ops *shader_backend;
> +    const struct fragment_pipeline *fragment_pipeline;
> +
> +    shader_backend = select_shader_backend(gl_info);
> +    shader_backend->shader_get_caps(gl_info, &shader_caps);
> +
> +    if (shader_caps.vs_version >= 4)
> +      return 10;
> +    //wine can not use SM 4 on mesa drivers as the necessary functionality is not exposed on compatibility contexts, but still set the pci id accordingly
Please avoid C99 features like // comments.

> +    if (shader_caps.vs_version == 3 && gl_info->glsl_version >= MAKEDWORD_VERSION(1, 30))
> +      return 10;
> +    if (shader_caps.vs_version >= 2)
> +      return 9;
> +    if (shader_caps.vs_version == 1)
> +      return 8;
> +
> +    fragment_pipeline = select_fragment_implementation(gl_info, shader_backend);
> +    fragment_pipeline->get_caps(gl_info, &fragment_caps);
> +
> +    if (fragment_caps.TextureOpCaps & WINED3DTEXOPCAPS_DOTPRODUCT3)
> +      return 7;
> +    if (gl_info->limits.textures > 1)
> +      return 6;
That's "fragment_caps.MaxSimultaneousTextures".

It probably makes sense to reorganize things a bit. For example, the
gl_info parameter to the select_card() callbacks in struct
gl_vendor_selection is really only used by select_card_nvidia_binary()
and select_card_amd_binary() to call d3d_level_from_gl_info(), but I
don't think anything of value would be lost if those used a plain
table like e.g. select_card_amd_mesa(). (At which point you wouldn't
need a callback there anymore either.) d3d_level_from_gl_info() should
probably get the shader and fragment caps passed as parameters, and be
renamed. It probably makes sense to make it return some kind of enum
instead of a plain number, so you can e.g. distinguish between D3D9
SM2 and D3D9 SM3. That would also allow the fallback card selection
code to use plain tables instead of callbacks.