1 files changed, 48 insertions, 3 deletions
diff --git a/indra/llrender/llrendertarget.cpp b/indra/llrender/llrendertarget.cpp
index 99f0da330c..846311a8d0 100644
--- a/indra/llrender/llrendertarget.cpp
+++ b/indra/llrender/llrendertarget.cpp
@@ -69,6 +69,42 @@ LLRenderTarget::~LLRenderTarget()
 	release();
 }
 
+void LLRenderTarget::resize(U32 resx, U32 resy, U32 color_fmt)
+{ 
+	//for accounting, get the number of pixels added/subtracted
+	S32 pix_diff = (resx*resy)-(mResX*mResY);
+		
+	mResX = resx;
+	mResY = resy;
+
+	for (U32 i = 0; i < mTex.size(); ++i)
+	{ //resize color attachments
+		gGL.getTexUnit(0)->bindManual(mUsage, mTex[i]);
+		LLImageGL::setManualImage(LLTexUnit::getInternalType(mUsage), 0, color_fmt, mResX, mResY, GL_RGBA, GL_UNSIGNED_BYTE, NULL, false);
+		sBytesAllocated += pix_diff*4;
+	}
+
+	if (mDepth)
+	{ //resize depth attachment
+		if (mStencil)
+		{
+			//use render buffers where stencil buffers are in play
+			glBindRenderbuffer(GL_RENDERBUFFER, mDepth);
+			glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, mResX, mResY);
+			glBindRenderbuffer(GL_RENDERBUFFER, 0);
+		}
+		else
+		{
+			gGL.getTexUnit(0)->bindManual(mUsage, mDepth);
+			U32 internal_type = LLTexUnit::getInternalType(mUsage);
+			LLImageGL::setManualImage(internal_type, 0, GL_DEPTH_COMPONENT24, mResX, mResY, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, NULL, false);
+		}
+
+		sBytesAllocated += pix_diff*4;
+	}
+}
+	
+
 bool LLRenderTarget::allocate(U32 resx, U32 resy, U32 color_fmt, bool depth, bool stencil, LLTexUnit::eTextureType usage, bool use_fbo, S32 samples)
 {
 	stop_glerror();
@@ -127,10 +163,19 @@ bool LLRenderTarget::addColorAttachment(U32 color_fmt)
 	}
 
 	U32 offset = mTex.size();
-	if (offset >= 4 ||
-		(offset > 0 && (mFBO == 0 || !gGLManager.mHasDrawBuffers)))
+
+	if( offset >= 4 )
+	{
+		llwarns << "Too many color attachments" << llendl;
+		llassert( offset < 4 );
+		return false;
+	}
+	if( offset > 0 && (mFBO == 0 || !gGLManager.mHasDrawBuffers) )
 	{
-		llerrs << "Too many color attachments!" << llendl;
+		llwarns << "FBO not used or no drawbuffers available; mFBO=" << (U32)mFBO << " gGLManager.mHasDrawBuffers=" << (U32)gGLManager.mHasDrawBuffers << llendl;
+		llassert(  mFBO != 0 );
+		llassert( gGLManager.mHasDrawBuffers );
+		return false;
 	}
 
 	U32 tex;