Matteo Bruni : wined3d: Reject unsupported pitches in wined3d_surface_update_desc().

[Alexandre Julliard]

Module: wine
Branch: master
Commit: b47695bf3abd188a9e4185c43df3c80ea92bd74b
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=b47695bf3abd188a9e4185c43df3c80ea92bd74b

Author: Matteo Bruni <mbruni at codeweavers.com>
Date:   Wed Feb 18 19:21:00 2015 +0100

wined3d: Reject unsupported pitches in wined3d_surface_update_desc().

---

 dlls/wined3d/texture.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/dlls/wined3d/texture.c b/dlls/wined3d/texture.c
index 675ca9e..6b2e266 100644
--- a/dlls/wined3d/texture.c
+++ b/dlls/wined3d/texture.c
@@ -658,6 +658,19 @@ HRESULT CDECL wined3d_texture_update_desc(struct wined3d_texture *texture, UINT
         return WINED3DERR_INVALIDCALL;
     }
 
+    /* We have no way of supporting a pitch that is not a multiple of the pixel
+     * byte width short of uploading the texture row-by-row.
+     * Fortunately that's not an issue since D3D9Ex doesn't allow a custom pitch
+     * for user-memory textures (it always expects packed data) while DirectDraw
+     * requires a 4-byte aligned pitch and doesn't support texture formats
+     * larger than 4 bytes per pixel nor any format using 3 bytes per pixel.
+     * This check is here to verify that the assumption holds. */
+    if (pitch % texture->resource.format->byte_count)
+    {
+        WARN("Pitch unsupported, not a multiple of the texture format byte width.\n");
+        return WINED3DERR_INVALIDCALL;
+    }
+
     surface = surface_from_resource(texture->sub_resources[0]);
     if (surface->resource.map_count || (surface->flags & SFLAG_DCINUSE))
     {