Added a new function to know if an image is using an alpha channel.

This all will be useful for my next patch: Repair windows opacity break in SDL mode.

1 files changed, 8 insertions, 2 deletions

diff --git a/src/resources/image.h b/src/resources/image.h
index c97523a9..535a3536 100644
--- a/src/resources/image.h
+++ b/src/resources/image.h
@@ -111,12 +111,18 @@ class Image : public Resource
         { return mBounds.h; }
 
         /**
-         * Tells if the image was loade using OpenGL or SDL
+         * Tells if the image was loaded using OpenGL or SDL
          * @return true if OpenGL, false if SDL.
          */
         bool isAnOpenGLOne() const;
 
         /**
+         * Tells if the image has got an alpha channel
+         * @return true if OpenGL, false if SDL.
+         */
+        bool hasAlphaChannel();
+
+        /**
          * Sets the alpha value of this image.
          */
         virtual void setAlpha(float alpha);
@@ -181,6 +187,7 @@ class Image : public Resource
         SDL_Rect mBounds;
         bool mLoaded;
         float mAlpha;
+        bool mAlphaChannel;
 
       // -----------------------
       // SDL protected members
@@ -191,7 +198,6 @@ class Image : public Resource
 
         static Image *_SDLload(SDL_Surface *tmpImage);
 
-
         SDL_Surface *mSDLSurface;