From 0a69f419ffadee5822bc103be9e85d378e0d0274 Mon Sep 17 00:00:00 2001
From: Holger Schemel <info@artsoft.org>
Date: Tue, 9 Feb 2016 23:54:54 +0100
Subject: [PATCH] fixed re-initialization of textures after change of renderer

---
 src/init.c           |  5 +++--
 src/libgame/image.c  | 23 +++++++++++++++++------
 src/libgame/image.h  |  2 +-
 src/libgame/sdl.c    | 16 ++++++++++++++++
 src/libgame/sdl.h    |  1 +
 src/libgame/system.c |  5 +++++
 src/libgame/system.h |  1 +
 7 files changed, 44 insertions(+), 9 deletions(-)

diff --git a/src/init.c b/src/init.c
index ca5d16b6..375bf6a3 100644
--- a/src/init.c
+++ b/src/init.c
@@ -230,6 +230,8 @@ void InitImageTextures()
 {
   int i, j, k;
 
+  FreeAllImageTextures();
+
   for (i = 0; i < NUM_GLOBAL_ANIMS; i++)
   {
     for (j = 0; j < NUM_GLOBAL_ANIM_PARTS_ALL; j++)
@@ -241,8 +243,7 @@ void InitImageTextures()
 	if (graphic == IMG_UNDEFINED)
 	  continue;
 
-	// (re)create textures from images for fast GPU blitting, if possible
-	ReCreateImageTextures(graphic);
+	CreateImageTextures(graphic);
       }
     }
   }
diff --git a/src/libgame/image.c b/src/libgame/image.c
index 16b4574d..76d9b183 100644
--- a/src/libgame/image.c
+++ b/src/libgame/image.c
@@ -351,11 +351,11 @@ void CreateImageWithSmallImages(int pos, int zoom_factor, int tile_size)
   setString(&img_info->leveldir, leveldir_current->identifier);
 }
 
-static void CreateImageTexturesExt(int pos, boolean force)
+void CreateImageTextures(int pos)
 {
   ImageInfo *img_info = getImageInfoEntryFromImageID(pos);
 
-  if (img_info == NULL || (img_info->contains_textures && !force))
+  if (img_info == NULL || img_info->contains_textures)
     return;
 
   CreateBitmapTextures(img_info->bitmaps);
@@ -363,14 +363,25 @@ static void CreateImageTexturesExt(int pos, boolean force)
   img_info->contains_textures = TRUE;
 }
 
-void CreateImageTextures(int pos)
+void FreeImageTextures(int pos)
 {
-  CreateImageTexturesExt(pos, FALSE);
+  ImageInfo *img_info = getImageInfoEntryFromImageID(pos);
+
+  if (img_info == NULL || !img_info->contains_textures)
+    return;
+
+  FreeBitmapTextures(img_info->bitmaps);
+
+  img_info->contains_textures = FALSE;
 }
 
-void ReCreateImageTextures(int pos)
+void FreeAllImageTextures()
 {
-  CreateImageTexturesExt(pos, TRUE);
+  int num_images = getImageListSize();
+  int i;
+
+  for (i = 0; i < num_images; i++)
+    FreeImageTextures(i);
 }
 
 void ScaleImage(int pos, int zoom_factor)
diff --git a/src/libgame/image.h b/src/libgame/image.h
index 2d970823..76ff3509 100644
--- a/src/libgame/image.h
+++ b/src/libgame/image.h
@@ -68,7 +68,7 @@ void InitImageList(struct ConfigInfo *, int, struct ConfigTypeInfo *,
 void ReloadCustomImages();
 void CreateImageWithSmallImages(int, int, int);
 void CreateImageTextures(int);
-void ReCreateImageTextures(int);
+void FreeAllImageTextures();
 void ScaleImage(int, int);
 
 void FreeAllImages();
diff --git a/src/libgame/sdl.c b/src/libgame/sdl.c
index 7fbd38f7..d431aacf 100644
--- a/src/libgame/sdl.c
+++ b/src/libgame/sdl.c
@@ -349,6 +349,22 @@ void SDLCreateBitmapTextures(Bitmap *bitmap)
 #endif
 }
 
+void SDLFreeBitmapTextures(Bitmap *bitmap)
+{
+#if defined(TARGET_SDL2)
+  if (bitmap == NULL)
+    return;
+
+  if (bitmap->texture)
+    SDL_DestroyTexture(bitmap->texture);
+  if (bitmap->texture_masked)
+    SDL_DestroyTexture(bitmap->texture_masked);
+
+  bitmap->texture = NULL;
+  bitmap->texture_masked = NULL;
+#endif
+}
+
 void SDLInitVideoDisplay(void)
 {
 #if !defined(TARGET_SDL2)
diff --git a/src/libgame/sdl.h b/src/libgame/sdl.h
index 7cc3b459..121b15bf 100644
--- a/src/libgame/sdl.h
+++ b/src/libgame/sdl.h
@@ -435,6 +435,7 @@ struct MouseCursorInfo
 boolean SDLSetNativeSurface(SDL_Surface **);
 SDL_Surface *SDLGetNativeSurface(SDL_Surface *);
 void SDLCreateBitmapTextures(Bitmap *);
+void SDLFreeBitmapTextures(Bitmap *);
 
 #if defined(TARGET_SDL2)
 SDL_Surface *SDL_DisplayFormat(SDL_Surface *);
diff --git a/src/libgame/system.c b/src/libgame/system.c
index 40b1aaa4..a52b4ec2 100644
--- a/src/libgame/system.c
+++ b/src/libgame/system.c
@@ -1190,6 +1190,11 @@ void CreateBitmapTextures(Bitmap **bitmaps)
   SDLCreateBitmapTextures(bitmaps[IMG_BITMAP_STANDARD]);
 }
 
+void FreeBitmapTextures(Bitmap **bitmaps)
+{
+  SDLFreeBitmapTextures(bitmaps[IMG_BITMAP_STANDARD]);
+}
+
 void ScaleBitmap(Bitmap **bitmaps, int zoom_factor)
 {
   CreateScaledBitmaps(bitmaps, zoom_factor, 0, FALSE);
diff --git a/src/libgame/system.h b/src/libgame/system.h
index 875a6540..107d5ae0 100644
--- a/src/libgame/system.h
+++ b/src/libgame/system.h
@@ -1377,6 +1377,7 @@ Bitmap *ZoomBitmap(Bitmap *, int, int);
 void ReCreateGameTileSizeBitmap(Bitmap **);
 void CreateBitmapWithSmallBitmaps(Bitmap **, int, int);
 void CreateBitmapTextures(Bitmap **);
+void FreeBitmapTextures(Bitmap **);
 void ScaleBitmap(Bitmap **, int);
 
 void SetMouseCursor(int);
-- 
2.34.1