fix partial texture update on open

Author: mastercoms

src/game/client/game_controls/interactivewebpanel.h

@@ -34,6 +34,8 @@ class CInteractiveWebPanel : public EditablePanel
 
     void LoadInteractivePanel();
 
+    void ForceFullTextureUpload() { m_pHTML->ForceFullTextureUpload(); }
+
 private:
     void LoadInteractivePanel(bool bForceReload);
 

src/game/client/tf/tf_hud_mainmenuoverride.cpp

@@ -379,6 +379,7 @@ void CHudMainMenuOverride::OnTick()
 					else
 					{
 						GetGameStateManager()->QueueEvent( "openedmenu", "" );
+						m_pMainMenuWebUi->ForceFullTextureUpload();
 					}
 					m_pMainMenuWebUi->SetVisible( bGameUIVisible );
 				}

src/vgui2/vgui_controls/HTML.cpp

@@ -1314,7 +1314,7 @@ void HTML::BrowserNeedsPaint( HTML_NeedsPaint_t *pCallback )
 		m_allocedTextureWidth = pCallback->unWide;
 		m_allocedTextureHeight = pCallback->unTall;
 	}
-	else if ( (int)pCallback->unUpdateWide > 0 && (int)pCallback->unUpdateTall > 0 )
+	else if ( !m_bNeedsFullTextureUpload && (int)pCallback->unUpdateWide > 0 && (int)pCallback->unUpdateTall > 0 )
 	{
 		surface()->DrawUpdateRegionTextureRGBA( m_iHTMLTextureID, pCallback->unUpdateX, pCallback->unUpdateY, (const unsigned char *)pCallback->pBGRA, pCallback->unUpdateWide, pCallback->unUpdateTall, IMAGE_FORMAT_BGRA8888 );
 	}