# HG changeset patch
# User Connor Behan <connor.behan@gmail.com>
# Date 1370038985 -7200
# Node ID 52b02042b27f75acbcb2bd4822bedb00ab680e67
# Parent  08ed531fed70978385cf9253bbc8389b0abe76ca
Bug 722975: Unbreak builds using --with-system-cairo. r=bas

diff --git a/gfx/thebes/gfxPlatform.cpp b/gfx/thebes/gfxPlatform.cpp
--- a/gfx/thebes/gfxPlatform.cpp
+++ b/gfx/thebes/gfxPlatform.cpp
@@ -548,23 +548,31 @@ struct SourceSurfaceUserData
   BackendType mBackendType;
 };
 
 void SourceBufferDestroy(void *srcSurfUD)
 {
   delete static_cast<SourceSurfaceUserData*>(srcSurfUD);
 }
 
+#if MOZ_TREE_CAIRO
 void SourceSnapshotDetached(cairo_surface_t *nullSurf)
 {
   gfxImageSurface* origSurf =
     static_cast<gfxImageSurface*>(cairo_surface_get_user_data(nullSurf, &kSourceSurface));
 
   origSurf->SetData(&kSourceSurface, NULL, NULL);
 }
+#else
+void SourceSnapshotDetached(void *nullSurf)
+{
+  gfxImageSurface* origSurf = static_cast<gfxImageSurface*>(nullSurf);
+  origSurf->SetData(&kSourceSurface, NULL, NULL);
+}
+#endif
 
 RefPtr<SourceSurface>
 gfxPlatform::GetSourceSurfaceForSurface(DrawTarget *aTarget, gfxASurface *aSurface)
 {
   void *userData = aSurface->GetData(&kSourceSurface);
 
   if (userData) {
     SourceSurfaceUserData *surf = static_cast<SourceSurfaceUserData*>(userData);
@@ -667,24 +675,28 @@ gfxPlatform::GetSourceSurfaceForSurface(
       }
 
       srcBuffer = Factory::CreateWrappingDataSourceSurface(imgSurface->Data(),
                                                            imgSurface->Stride(),
                                                            size, format);
 
     }
 
+#if MOZ_TREE_CAIRO
     cairo_surface_t *nullSurf =
 	cairo_null_surface_create(CAIRO_CONTENT_COLOR_ALPHA);
     cairo_surface_set_user_data(nullSurf,
                                 &kSourceSurface,
                                 imgSurface,
                                 NULL);
     cairo_surface_attach_snapshot(imgSurface->CairoSurface(), nullSurf, SourceSnapshotDetached);
     cairo_surface_destroy(nullSurf);
+#else
+    cairo_surface_set_mime_data(imgSurface->CairoSurface(), "mozilla/magic", (const unsigned char*) "data", 4, SourceSnapshotDetached, imgSurface.get());
+#endif
   }
 
   SourceSurfaceUserData *srcSurfUD = new SourceSurfaceUserData;
   srcSurfUD->mBackendType = aTarget->GetType();
   srcSurfUD->mSrcSurface = srcBuffer;
   aSurface->SetData(&kSourceSurface, srcSurfUD, SourceBufferDestroy);
 
   return srcBuffer;