From 41c00e87d42580881d8c7001f39014814e3b55f2 Mon Sep 17 00:00:00 2001
From: Kahrl <kahrl@gmx.net>
Date: Thu, 2 Feb 2012 04:11:56 +0100
Subject: [PATCH] Don't leak textures all over the place

---
 src/mesh.cpp |  3 +++
 src/tile.cpp | 40 ++++++++++++++++++++++++++++------------
 2 files changed, 31 insertions(+), 12 deletions(-)

diff --git a/src/mesh.cpp b/src/mesh.cpp
index 0f075f72b..b9ec82e18 100644
--- a/src/mesh.cpp
+++ b/src/mesh.cpp
@@ -433,6 +433,9 @@ video::ITexture *generateTextureFromMesh(scene::IMesh *mesh,
 	}
 
 	// Create render target texture
+	video::ITexture *oldtexture = driver->findTexture(texture_name.c_str());
+	if(oldtexture)
+		driver->removeTexture(oldtexture);
 	video::ITexture *rtt = driver->addRenderTargetTexture(
 			dim, texture_name.c_str(), video::ECF_A8R8G8B8);
 	if(rtt == NULL)
diff --git a/src/tile.cpp b/src/tile.cpp
index f7f1779ca..e676c56c4 100644
--- a/src/tile.cpp
+++ b/src/tile.cpp
@@ -518,6 +518,15 @@ core::dimension2d<u32> imageTransformDimension(u32 transform, core::dimension2d<
 // Apply transform to image data
 void imageTransform(u32 transform, video::IImage *src, video::IImage *dst);
 
+/*
+	Adds a new texture to the video driver and returns a pointer to it.
+	This pointer should not be dropped. Any texture that was registered
+	with that name before is removed (this may invalidate some ITexture
+	pointers).
+*/
+video::ITexture* register_texture(video::IVideoDriver *driver,
+		std::string name, video::IImage *img);
+
 /*
 	Generate image based on a string like "stone.png" or "[crack0".
 	if baseimg is NULL, it is created. Otherwise stuff is made on it.
@@ -686,11 +695,9 @@ u32 TextureSource::getTextureIdDirect(const std::string &name)
 				" create texture \""<<name<<"\""<<std::endl;
 	}
 	
+	// Create texture from resulting image
 	if(baseimg != NULL)
-	{
-		// Create texture from resulting image
-		t = driver->addTexture(name.c_str(), baseimg);
-	}
+		t = register_texture(driver, name, baseimg);
 	
 	/*
 		Add texture to caches (add NULL textures too)
@@ -809,7 +816,7 @@ void TextureSource::rebuildImagesAndTextures()
 		// Create texture from resulting image
 		video::ITexture *t = NULL;
 		if(img)
-			t = driver->addTexture(sap->name.c_str(), img);
+			t = register_texture(driver, sap->name, img);
 		
 		// Replace texture
 		sap->a.atlas = t;
@@ -1044,7 +1051,7 @@ void TextureSource::buildMainAtlas(class IGameDef *gamedef)
 	/*
 		Make texture
 	*/
-	video::ITexture *t = driver->addTexture("__main_atlas__", atlas_img);
+	video::ITexture *t = register_texture(driver, "__main_atlas__", atlas_img);
 	assert(t);
 
 	/*
@@ -1135,6 +1142,15 @@ video::IImage* generate_image_from_scratch(std::string name,
 	return baseimg;
 }
 
+video::ITexture* register_texture(video::IVideoDriver *driver,
+		std::string name, video::IImage *img)
+{
+	video::ITexture *old_texture = driver->findTexture(name.c_str());
+	if(old_texture)
+		driver->removeTexture(old_texture);
+	return driver->addTexture(name.c_str(), img);
+}
+
 bool generate_image(std::string part_of_name, video::IImage *& baseimg,
 		IrrlichtDevice *device, SourceImageCache *sourcecache)
 {
@@ -1541,12 +1557,12 @@ bool generate_image(std::string part_of_name, video::IImage *& baseimg,
 			assert(img_top && img_left && img_right);
 
 			// Create textures from images
-			video::ITexture *texture_top = driver->addTexture(
-					(imagename_top + "__temp__").c_str(), img_top);
-			video::ITexture *texture_left = driver->addTexture(
-					(imagename_left + "__temp__").c_str(), img_left);
-			video::ITexture *texture_right = driver->addTexture(
-					(imagename_right + "__temp__").c_str(), img_right);
+			video::ITexture *texture_top = register_texture(driver,
+					imagename_top + "__temp1__", img_top);
+			video::ITexture *texture_left = register_texture(driver,
+					imagename_left + "__temp2__", img_left);
+			video::ITexture *texture_right = register_texture(driver,
+					imagename_right + "__temp3__", img_right);
 			assert(texture_top && texture_left && texture_right);
 
 			// Drop images
-- 
2.25.1