6 files changed, 22 insertions, 15 deletions
diff --git a/indra/llrender/llfontgl.cpp b/indra/llrender/llfontgl.cpp
index 0e2946632a..cf0a117567 100644
--- a/indra/llrender/llfontgl.cpp
+++ b/indra/llrender/llfontgl.cpp
@@ -364,12 +364,7 @@ S32 LLFontGL::render(const LLWString &wstr, S32 begin_offset, F32 x, F32 y, cons
 
 	if (right_x)
 	{
-        F32 cr_x = (cur_x - origin.mV[VX]) / sScaleX;
-        if (*right_x < cr_x)
-        {
-            // rightmost edge of previously drawn text, don't draw over previous text
-            *right_x = cr_x;
-        }
+		*right_x = (cur_x - origin.mV[VX]) / sScaleX;
 	}
 
 	//FIXME: add underline as glyph?
diff --git a/indra/llrender/llglslshader.cpp b/indra/llrender/llglslshader.cpp
index b30bc1aed6..58c1186a3e 100644
--- a/indra/llrender/llglslshader.cpp
+++ b/indra/llrender/llglslshader.cpp
@@ -349,8 +349,8 @@ void LLGLSLShader::unloadInternal()
         for (GLsizei i = 0; i < count; i++)
         {
             glDetachObjectARB(mProgramObject, obj[i]);
-            glDeleteObjectARB(obj[i]);
-        }
+                glDeleteObjectARB(obj[i]);
+            }
 
         glDeleteObjectARB(mProgramObject);
 
diff --git a/indra/llrender/llimagegl.cpp b/indra/llrender/llimagegl.cpp
index ebed454271..81a5537f78 100644
--- a/indra/llrender/llimagegl.cpp
+++ b/indra/llrender/llimagegl.cpp
@@ -487,14 +487,15 @@ bool LLImageGL::checkSize(S32 width, S32 height)
 	return check_power_of_two(width) && check_power_of_two(height);
 }
 
-void LLImageGL::setSize(S32 width, S32 height, S32 ncomponents, S32 discard_level)
+bool LLImageGL::setSize(S32 width, S32 height, S32 ncomponents, S32 discard_level)
 {
 	if (width != mWidth || height != mHeight || ncomponents != mComponents)
 	{
 		// Check if dimensions are a power of two!
 		if (!checkSize(width,height))
 		{
-			LL_ERRS() << llformat("Texture has non power of two dimension: %dx%d",width,height) << LL_ENDL;
+			LL_WARNS() << llformat("Texture has non power of two dimension: %dx%d",width,height) << LL_ENDL;
+			return false;
 		}
 		
 		if (mTexName)
@@ -529,6 +530,8 @@ void LLImageGL::setSize(S32 width, S32 height, S32 ncomponents, S32 discard_leve
 			mMaxDiscardLevel = MAX_DISCARD_LEVEL;
 		}
 	}
+
+	return true;
 }
 
 //----------------------------------------------------------------------------
@@ -909,7 +912,11 @@ BOOL LLImageGL::preAddToAtlas(S32 discard_level, const LLImageRaw* raw_image)
 	S32 h = raw_image->getHeight() << discard_level;
 
 	// setSize may call destroyGLTexture if the size does not match
-	setSize(w, h, raw_image->getComponents(), discard_level);
+	if (!setSize(w, h, raw_image->getComponents(), discard_level))
+	{
+		LL_WARNS() << "Trying to create a texture with incorrect dimensions!" << LL_ENDL;
+		return FALSE;
+	}
 
 	if( !mHasExplicitFormat )
 	{
@@ -1273,7 +1280,11 @@ BOOL LLImageGL::createGLTexture(S32 discard_level, const LLImageRaw* imageraw, S
 	S32 h = raw_h << discard_level;
 
 	// setSize may call destroyGLTexture if the size does not match
-	setSize(w, h, imageraw->getComponents(), discard_level);
+	if (!setSize(w, h, imageraw->getComponents(), discard_level))
+	{
+		LL_WARNS() << "Trying to create a texture with incorrect dimensions!" << LL_ENDL;
+		return FALSE;
+	}
 
 	if( !mHasExplicitFormat )
 	{
diff --git a/indra/llrender/llimagegl.h b/indra/llrender/llimagegl.h
index 21982eab1d..ad2aea9067 100644
--- a/indra/llrender/llimagegl.h
+++ b/indra/llrender/llimagegl.h
@@ -94,7 +94,7 @@ protected:
 public:
 	virtual void dump();	// debugging info to LL_INFOS()
 	
-	void setSize(S32 width, S32 height, S32 ncomponents, S32 discard_level = -1);
+	bool setSize(S32 width, S32 height, S32 ncomponents, S32 discard_level = -1);
 	void setComponents(S32 ncomponents) { mComponents = (S8)ncomponents ;}
 	void setAllowCompression(bool allow) { mAllowCompression = allow; }
 
diff --git a/indra/llrender/llrender.cpp b/indra/llrender/llrender.cpp
index 69420dd0bb..0e242a20f6 100644
--- a/indra/llrender/llrender.cpp
+++ b/indra/llrender/llrender.cpp
@@ -2039,7 +2039,8 @@ void LLRender::vertexBatchPreTransformed(LLVector3* verts, S32 vert_count)
 		}
 	}
 
-	mVerticesp[mCount] = mVerticesp[mCount-1];
+	if( mCount > 0 ) // ND: Guard against crashes if mCount is zero, yes it can happen
+		mVerticesp[mCount] = mVerticesp[mCount-1];
 }
 
 void LLRender::vertexBatchPreTransformed(LLVector3* verts, LLVector2* uvs, S32 vert_count)
diff --git a/indra/llrender/llshadermgr.cpp b/indra/llrender/llshadermgr.cpp
index b297223c2e..55f0791174 100644
--- a/indra/llrender/llshadermgr.cpp
+++ b/indra/llrender/llshadermgr.cpp
@@ -520,7 +520,7 @@ void LLShaderMgr::dumpObjectLog(GLhandleARB ret, BOOL warns, const std::string&
 		if (!filename.empty())
 		{
             LL_CONT << "From " << filename << ":\n";
-        }
+		}
         LL_CONT << log << LL_ENDL;
 	}
  }