Implement opacity cache for SDL surfaces.

Enabled by default.
Can be disabled in configuration option "alphaCache" if set it to 0.

Reviewed-by: Bertram

1 files changed, 15 insertions, 0 deletions

diff --git a/src/resources/resourcemanager.cpp b/src/resources/resourcemanager.cpp
index c63b626e..00e4726e 100644
--- a/src/resources/resourcemanager.cpp
+++ b/src/resources/resourcemanager.cpp
@@ -533,3 +533,18 @@ SDL_Surface *ResourceManager::loadSDLSurface(const std::string &filename)
 
     return tmp;
 }
+
+void ResourceManager::scheduleDelete(SDL_Surface* surface)
+{
+    mDeletedSurfaces.insert(surface);
+}
+
+void ResourceManager::clearScheduled()
+{
+    for (std::set<SDL_Surface*>::iterator i = mDeletedSurfaces.begin(),
+         i_end = mDeletedSurfaces.end(); i != i_end; ++i)
+    {
+        SDL_FreeSurface(*i);
+    }
+    mDeletedSurfaces.clear();
+}