public virtual void render()
        {
            makeCurrent();
            updateNativeOverlay();
            mSupport.nextFrame();
            if (mContext == null || mContext.getDriverInfo() == "Disposed")
            {
                return;
            }
            if (!mShareContext)
            {
                AsRenderSupport.clear(mStage.getColor(), 1.0f);
            }
            float scaleX = mViewPort.width / mStage.getStageWidth();
            float scaleY = mViewPort.height / mStage.getStageHeight();

            mContext.setDepthTest(false, AsContext3DCompareMode.ALWAYS);
            mContext.setCulling(AsContext3DTriangleFace.NONE);
            mSupport.setRenderTarget(null);
            mSupport.setOrthographicProjection(mViewPort.x < 0 ? -mViewPort.x / scaleX : 0.0f, mViewPort.y < 0 ? -mViewPort.y / scaleY : 0.0f, mViewPortClipped.width / scaleX, mViewPortClipped.height / scaleY);
            mStage.render(mSupport, 1.0f);
            mSupport.finishQuadBatch();
            if (mStatsDisplay != null)
            {
                mStatsDisplay.setDrawCount(mSupport.getDrawCount());
            }
            if (!mShareContext)
            {
                mContext.present();
            }
        }
 private AsQuadBatch renderPasses(AsDisplayObject _object, AsRenderSupport support, float parentAlpha, bool intoCache)
 {
     AsTexture cacheTexture = null;
     AsStage stage = _object.getStage();
     AsContext3D context = AsStarling.getContext();
     float scale = AsStarling.getCurrent().getContentScaleFactor();
     if(stage == null)
     {
         throw new AsError("Filtered object must be on the stage.");
     }
     if(context == null)
     {
         throw new AsMissingContextError();
     }
     support.finishQuadBatch();
     support.raiseDrawCount((uint)(mNumPasses));
     support.pushMatrix();
     support.setBlendMode(AsBlendMode.NORMAL);
     AsRenderSupport.setBlendFactors(PMA);
     mProjMatrix.copyFrom(support.getProjectionMatrix());
     AsTexture previousRenderTarget = support.getRenderTarget();
     if(previousRenderTarget != null)
     {
         throw new AsIllegalOperationError("It's currently not possible to stack filters! " + "This limitation will be removed in a future Stage3D version.");
     }
     calculateBounds(_object, stage, sBounds);
     updateBuffers(context, sBounds);
     updatePassTextures((int)(sBounds.width), (int)(sBounds.height), mResolution * scale);
     if(intoCache)
     {
         cacheTexture = AsTexture.empty((int)(sBounds.width), (int)(sBounds.height), PMA, true, mResolution * scale);
     }
     support.setRenderTarget(mPassTextures[0]);
     support.clear();
     support.setOrthographicProjection(sBounds.x, sBounds.y, sBounds.width, sBounds.height);
     _object.render(support, parentAlpha);
     support.finishQuadBatch();
     AsRenderSupport.setBlendFactors(PMA);
     support.loadIdentity();
     context.setVertexBufferAt(0, mVertexBuffer, AsVertexData.POSITION_OFFSET, AsContext3DVertexBufferFormat.FLOAT_2);
     context.setVertexBufferAt(1, mVertexBuffer, AsVertexData.TEXCOORD_OFFSET, AsContext3DVertexBufferFormat.FLOAT_2);
     int i = 0;
     for (; i < mNumPasses; ++i)
     {
         if(i < mNumPasses - 1)
         {
             support.setRenderTarget(getPassTexture(i + 1));
             support.clear();
         }
         else
         {
             if(intoCache)
             {
                 support.setRenderTarget(cacheTexture);
                 support.clear();
             }
             else
             {
                 support.setRenderTarget(previousRenderTarget);
                 support.getProjectionMatrix().copyFrom(mProjMatrix);
                 support.translateMatrix(mOffsetX, mOffsetY);
                 support.setBlendMode(_object.getBlendMode());
                 support.applyBlendMode(PMA);
             }
         }
         AsTexture passTexture = getPassTexture(i);
         context.setProgramConstantsFromMatrix(AsContext3DProgramType.VERTEX, 0, support.getMvpMatrix3D(), true);
         context.setTextureAt(0, passTexture.get_base());
         activate(i, context, passTexture);
         context.drawTriangles(mIndexBuffer, 0, 2);
         deactivate(i, context, passTexture);
     }
     context.setVertexBufferAt(0, null);
     context.setVertexBufferAt(1, null);
     context.setTextureAt(0, null);
     support.popMatrix();
     if(intoCache)
     {
         support.setRenderTarget(previousRenderTarget);
         support.getProjectionMatrix().copyFrom(mProjMatrix);
         AsQuadBatch quadBatch = new AsQuadBatch();
         AsImage image = new AsImage(cacheTexture);
         stage.getTransformationMatrix(_object, sTransformationMatrix);
         AsMatrixUtil.prependTranslation(sTransformationMatrix, sBounds.x + mOffsetX, sBounds.y + mOffsetY);
         quadBatch.addImage(image, 1.0f, sTransformationMatrix);
         return quadBatch;
     }
     else
     {
         return null;
     }
 }
 public virtual void clear(uint rgb, float alpha)
 {
     AsRenderSupport.clear(rgb, alpha);
 }