wined3d: Store sRGB read control support in struct wined3d_d3d_info.

dlls/wined3d/adapter_gl.c

@@ -3794,6 +3794,7 @@ static BOOL wined3d_adapter_init_gl_caps(struct wined3d_adapter *adapter,
     d3d_info->draw_base_vertex_offset = !!gl_info->supported[ARB_DRAW_ELEMENTS_BASE_VERTEX];
     d3d_info->vertex_bgra = !!gl_info->supported[ARB_VERTEX_ARRAY_BGRA];
     d3d_info->texture_swizzle = !!gl_info->supported[ARB_TEXTURE_SWIZZLE];
+    d3d_info->srgb_read_control = !!gl_info->supported[EXT_TEXTURE_SRGB_DECODE];
 
     if (gl_info->supported[ARB_TEXTURE_MULTISAMPLE])
         d3d_info->multisample_draw_location = WINED3D_LOCATION_TEXTURE_RGB;

dlls/wined3d/wined3d_private.h

@@ -212,6 +212,7 @@ struct wined3d_d3d_info
     unsigned int draw_base_vertex_offset : 1;
     unsigned int vertex_bgra : 1;
     unsigned int texture_swizzle : 1;
+    unsigned int srgb_read_control : 1;
     enum wined3d_feature_level feature_level;
 
     DWORD multisample_draw_location;
@@ -4819,7 +4820,7 @@ static inline BOOL needs_separate_srgb_gl_texture(const struct wined3d_context *
     unsigned int flags = texture->resource.format_flags
             & (WINED3DFMT_FLAG_SRGB_READ | WINED3DFMT_FLAG_SRGB_WRITE);
 
-    return (!context->gl_info->supported[EXT_TEXTURE_SRGB_DECODE]
+    return (!context->d3d_info->srgb_read_control
             || (flags && flags != (WINED3DFMT_FLAG_SRGB_READ | WINED3DFMT_FLAG_SRGB_WRITE)))
             && context->d3d_info->wined3d_creation_flags & WINED3D_SRGB_READ_WRITE_CONTROL;
 }