improve speed in software renderer in SDL2.

now it works almost with same speed like SDL1.2

3 files changed, 15 insertions, 4 deletions

diff --git a/src/render/graphics.h b/src/render/graphics.h
index c2fd7480a..eec6e4c9d 100644
--- a/src/render/graphics.h
+++ b/src/render/graphics.h
@@ -142,7 +142,7 @@ class Graphics : public gcn::Graphics
         /**
          * Resize the window to the specified size.
          */
-        bool resizeScreen(const int width, const int height);
+        virtual bool resizeScreen(const int width, const int height);
 
         /**
          * Blits an image onto the screen.
diff --git a/src/render/sdl2softwaregraphics.cpp b/src/render/sdl2softwaregraphics.cpp
index 857909636..ac9f962ac 100644
--- a/src/render/sdl2softwaregraphics.cpp
+++ b/src/render/sdl2softwaregraphics.cpp
@@ -32,7 +32,7 @@
 #include "logger.h"
 
 #include "resources/imagehelper.h"
-#include "resources/sdl2imagehelper.h"
+#include "resources/sdl2softwareimagehelper.h"
 
 #include <guichan/sdl/sdlpixel.hpp>
 
@@ -1267,7 +1267,8 @@ bool SDL2SoftwareGraphics::setVideoMode(const int w, const int h,
     }
 
     mSurface = SDL_GetWindowSurface(mWindow);
-    logger->log("window surface: %p", mSurface);
+    imageHelper->dumpSurfaceFormat(mSurface);
+    SDL2SoftwareImageHelper::setFormat(mSurface->format);
 
     int w1 = 0;
     int h1 = 0;
@@ -1276,8 +1277,16 @@ bool SDL2SoftwareGraphics::setVideoMode(const int w, const int h,
     mRect.h = h1;
 
     mRenderer = graphicsManager.createRenderer(mWindow, mRendererFlags);
-    SDLImageHelper::setRenderer(mRenderer);
     return videoInfo();
 }
 
+bool SDL2SoftwareGraphics::resizeScreen(const int width, const int height)
+{
+    const bool ret = Graphics::resizeScreen(width, height);
+
+    mSurface = SDL_GetWindowSurface(mWindow);
+    SDL2SoftwareImageHelper::setFormat(mSurface->format);
+    return ret;
+}
+
 #endif  // USE_SDL2
diff --git a/src/render/sdl2softwaregraphics.h b/src/render/sdl2softwaregraphics.h
index 7ddba5018..9fd53909d 100644
--- a/src/render/sdl2softwaregraphics.h
+++ b/src/render/sdl2softwaregraphics.h
@@ -131,6 +131,8 @@ class SDL2SoftwareGraphics : public Graphics
         void setRendererFlags(const uint32_t flags)
         { mRendererFlags = flags; }
 
+        bool resizeScreen(const int width, const int height);
+
     protected:
         virtual bool drawImage2(const Image *const image,
                                 int srcX, int srcY,