[PATCH 4/7] wined3d: Initialize unwritten texcoord varyings in the VS.

[Henri Verbeet]

On 2 October 2015 at 14:54, Matteo Bruni <mbruni at codeweavers.com> wrote:
> @@ -4998,7 +4996,22 @@ static GLuint generate_param_reorder_function(struct shader_glsl_priv *priv,
>                          output->register_idx, reg_mask[1]);
>              }
>          }
> -        shader_addline(buffer, "}\n");
> +
> +        for (i = 0; i < MAX_TEXTURES; ++i)
> +        {
> +            if (ps && !(ps->reg_maps.texcoord & (1u << i)))
> +                continue;
> +
> +            if (texcoords_written_mask[i] != WINED3DSP_WRITEMASK_ALL)
> +            {
> +                if (gl_info->limits.glsl_varyings < wined3d_max_compat_varyings(gl_info)
> +                        && !texcoords_written_mask[i])
> +                    continue;
> +
> +                shader_glsl_write_mask_to_str(~texcoords_written_mask[i] & WINED3DSP_WRITEMASK_ALL, reg_mask);
> +                shader_addline(buffer, "gl_TexCoord[%u]%s = vec4(0.0)%s;\n", i, reg_mask, reg_mask);
> +            }
> +        }
>      }
>      else
>      {
Doesn't this end up writing 0.0 to .w instead of 1.0? IIRC unwritten
texture coordinates are assumed to be (0, 0, 0, 1) in D3D. May apply
to the previous patch in the series as well.