From: Ricardo Cruz <rick2@aeiou.pt>
Date: Tue, 19 Oct 2004 17:45:38 +0000 (+0000)
Subject: Added filter to horizontal flip Surfaces.
X-Git-Url: https://git.verplant.org/?a=commitdiff_plain;h=f1e420934b6afd3c65183db7d87018cbfbde1221;p=supertux.git

Added filter to horizontal flip Surfaces.

SVN-Revision: 2034
---

diff --git a/lib/video/surface.cpp b/lib/video/surface.cpp
index 718fbeba9..1c69e3f9f 100644
--- a/lib/video/surface.cpp
+++ b/lib/video/surface.cpp
@@ -197,9 +197,9 @@ Surface::reload()
   }
 }
 
-void Surface::apply_mask(Color color)
+void Surface::apply_filter(int filter, Color color)
 {
-impl->apply_mask(color);
+impl->apply_filter(filter, color);
 }
 
 Surface::~Surface()
@@ -255,7 +255,25 @@ Surface::resize(int w_, int h_)
 void
 apply_filter_to_surface(SDL_Surface* surface, int filter, Color color)
 {
-if(filter == MASK_FILTER)
+if(filter == HORIZONTAL_FLIP_FILTER)
+  {
+  SDL_Surface* sur_copy = sdl_surface_from_sdl_surface(surface, true);
+  SDL_BlitSurface(surface, NULL, sur_copy, NULL);
+  SDL_SetAlpha(sur_copy,0,0);
+
+  SDL_Rect src, dst;
+  src.y = dst.y = 0;
+  src.w = dst.w = 1;
+  src.h = dst.h = sur_copy->h;
+  for(int x = 0; x < sur_copy->w; x++)
+    {
+    src.x = x; dst.x = sur_copy->w - x;
+    SDL_BlitSurface(sur_copy, &src, surface, &dst);
+    }
+
+  SDL_FreeSurface(sur_copy);
+  }
+else if(filter == MASK_FILTER)
   {
   SDL_Surface* sur_copy = sdl_surface_from_sdl_surface(surface, true);
 
@@ -841,9 +859,9 @@ SurfaceOpenGL::draw_stretched(float x, float y, int sw, int sh, Uint8 alpha, Uin
 }
 
 void
-SurfaceOpenGL::apply_mask(Color color)
+SurfaceOpenGL::apply_filter(int filter, Color color)
 {
-  ::apply_filter_to_surface(sdl_surface, MASK_FILTER, color);
+  ::apply_filter_to_surface(sdl_surface, filter, color);
   create_gl(sdl_surface,&gl_texture);
 
   w = sdl_surface->w;
@@ -1053,9 +1071,9 @@ SurfaceSDL::draw_stretched(float x, float y, int sw, int sh, Uint8 alpha, Uint32
 }
 
 void
-SurfaceSDL::apply_mask(Color color)
+SurfaceSDL::apply_filter(int filter, Color color)
 {
-  ::apply_filter_to_surface(sdl_surface, MASK_FILTER, color);
+  ::apply_filter_to_surface(sdl_surface, filter, color);
 
   w = sdl_surface->w;
   h = sdl_surface->h;
diff --git a/lib/video/surface.h b/lib/video/surface.h
index 23d0c2e3f..ef311d8a5 100644
--- a/lib/video/surface.h
+++ b/lib/video/surface.h
@@ -59,7 +59,9 @@ namespace SuperTux
 
   /// types of filters
   enum {
-    MASK_FILTER
+    HORIZONTAL_FLIP_FILTER,
+    MASK_FILTER,
+    NONE_FILTER
   };
 
   /** This class holds all the data necessary to construct a surface */
@@ -118,7 +120,7 @@ namespace SuperTux
 
       void resize(int widht, int height);
 
-      void apply_mask(Color color);
+      void apply_filter(int filter, Color color = Color(0,0,0));
     };
 
   /** Surface implementation, all implementation have to inherit from
@@ -146,7 +148,7 @@ namespace SuperTux
 
       SDL_Surface* get_sdl_surface() const; // @evil@ try to avoid this function
 
-      virtual void apply_mask(Color color) = 0;
+      virtual void apply_filter(int filter, Color color = Color(0,0,0)) = 0;
     };
 
   class SurfaceSDL : public SurfaceImpl
@@ -162,7 +164,7 @@ namespace SuperTux
       int draw_part(float sx, float sy, float x, float y, float w, float h,  Uint8 alpha, Uint32 effect = NONE_EFFECT);
       int draw_stretched(float x, float y, int w, int h, Uint8 alpha, Uint32 effect = NONE_EFFECT);
 
-      void apply_mask(Color color);
+      void apply_filter(int filter, Color color);
     };
 
 #ifndef NOOPENGL
@@ -183,7 +185,7 @@ namespace SuperTux
       int draw_part(float sx, float sy, float x, float y, float w, float h,  Uint8 alpha, Uint32 effect = NONE_EFFECT);
       int draw_stretched(float x, float y, int w, int h, Uint8 alpha, Uint32 effect = NONE_EFFECT);
 
-      void apply_mask(Color color);
+      void apply_filter(int filter, Color color);
 
     private:
       void create_gl(SDL_Surface * surf, GLuint * tex);