Buffer layered sprites under SDL

This improves framerate and allows transparent overlay for complex
sprites. Two copies of the buffer are kept, one at full opacity,
one with variable opactiy, to reduce calls to setAlpha.

Reviewed-by: Bertram

1 files changed, 3 insertions, 3 deletions

diff --git a/src/actorsprite.cpp b/src/actorsprite.cpp
index da81873f..92894b04 100644
--- a/src/actorsprite.cpp
+++ b/src/actorsprite.cpp
@@ -304,14 +304,14 @@ void ActorSprite::setupSpriteDisplay(const SpriteDisplay &display,
     {
         std::string file = "graphics/sprites/" + (*it)->sprite;
         int variant = (*it)->variant;
-        push_back(AnimatedSprite::load(file, variant));
+        addSprite(AnimatedSprite::load(file, variant));
     }
 
     // Ensure that something is shown, if desired
     if (size() == 0 && forceDisplay)
     {
         if (display.image.empty())
-            push_back(AnimatedSprite::load("graphics/sprites/error.xml"));
+            addSprite(AnimatedSprite::load("graphics/sprites/error.xml"));
         else
         {
             ResourceManager *resman = ResourceManager::getInstance();
@@ -321,7 +321,7 @@ void ActorSprite::setupSpriteDisplay(const SpriteDisplay &display,
             if (!img)
                 img = Theme::getImageFromTheme("unknown-item.png");
 
-            push_back(new ImageSprite(img));
+            addSprite(new ImageSprite(img));
         }
     }