wined3d: Factor out wined3d_texture_set_lod() function.

dlls/wined3d/stateblock.c

@@ -3321,28 +3321,14 @@ void CDECL wined3d_device_apply_stateblock(struct wined3d_device *device,
 unsigned int CDECL wined3d_stateblock_set_texture_lod(struct wined3d_stateblock *stateblock,
         struct wined3d_texture *texture, unsigned int lod)
 {
-    struct wined3d_resource *resource;
-    unsigned int old = texture->lod;
+    unsigned int old;
 
     TRACE("texture %p, lod %u.\n", texture, lod);
 
-    /* The d3d9:texture test shows that SetLOD is ignored on non-managed
-     * textures. The call always returns 0, and GetLOD always returns 0. */
-    resource = &texture->resource;
-    if (!(resource->usage & WINED3DUSAGE_MANAGED))
-    {
-        TRACE("Ignoring LOD on texture with resource access %s.\n",
-                wined3d_debug_resource_access(resource->access));
-        return 0;
-    }
+    old = wined3d_texture_set_lod(texture, lod);
 
-    if (lod >= texture->level_count)
-        lod = texture->level_count - 1;
-
-    if (texture->lod != lod)
+    if (old != lod)
     {
-        texture->lod = lod;
-
         for (unsigned int i = 0; i < WINED3D_MAX_COMBINED_SAMPLERS; ++i)
         {
             /* Mark the texture as changed. The next time the appplication

dlls/wined3d/texture.c

@@ -1784,6 +1784,30 @@ unsigned int CDECL wined3d_texture_get_lod(const struct wined3d_texture *texture
     return texture->lod;
 }
 
+unsigned int CDECL wined3d_texture_set_lod(struct wined3d_texture *texture, unsigned int lod)
+{
+    struct wined3d_resource *resource;
+    unsigned int old = texture->lod;
+
+    TRACE("texture %p, returning %u.\n", texture, texture->lod);
+
+    /* The d3d9:texture test shows that SetLOD is ignored on non-managed
+     * textures. The call always returns 0, and GetLOD always returns 0. */
+    resource = &texture->resource;
+    if (!(resource->usage & WINED3DUSAGE_MANAGED))
+    {
+        TRACE("Ignoring LOD on texture with resource access %s.\n",
+                wined3d_debug_resource_access(resource->access));
+        return 0;
+    }
+
+    if (lod >= texture->level_count)
+        lod = texture->level_count - 1;
+
+    texture->lod = lod;
+    return old;
+}
+
 UINT CDECL wined3d_texture_get_level_count(const struct wined3d_texture *texture)
 {
     TRACE("texture %p, returning %u.\n", texture, texture->level_count);

include/wine/wined3d.h

@@ -2883,6 +2883,7 @@ ULONG __cdecl wined3d_texture_decref(struct wined3d_texture *texture);
 HRESULT __cdecl wined3d_texture_get_dc(struct wined3d_texture *texture, unsigned int sub_resource_idx, HDC *dc);
 unsigned int __cdecl wined3d_texture_get_level_count(const struct wined3d_texture *texture);
 unsigned int __cdecl wined3d_texture_get_lod(const struct wined3d_texture *texture);
+unsigned int __cdecl wined3d_texture_set_lod(struct wined3d_texture *texture, unsigned int lod);
 HRESULT __cdecl wined3d_texture_get_overlay_position(const struct wined3d_texture *texture,
         unsigned int sub_resource_idx, LONG *x, LONG *y);
 void * __cdecl wined3d_texture_get_parent(const struct wined3d_texture *texture);