public virtual void renderCustom(AsMatrix mvpMatrix, float parentAlpha, String blendMode)
        {
            if (mNumQuads == 0)
            {
                return;
            }
            if (mSyncRequired)
            {
                syncBuffers();
            }
            bool        pma         = mVertexData.getPremultipliedAlpha();
            AsContext3D context     = AsStarling.getContext();
            bool        tinted      = mTinted || (parentAlpha != 1.0f);
            String      programName = mTexture != null?getImageProgramName(tinted, mTexture.getMipMapping(), mTexture.getRepeat(), mTexture.getFormat(), mSmoothing) : QUAD_PROGRAM_NAME;

            sRenderAlpha[0] = sRenderAlpha[1] = sRenderAlpha[2] = pma ? parentAlpha : 1.0f;
            sRenderAlpha[3] = parentAlpha;
            AsMatrixUtil.convertTo3D(mvpMatrix, sRenderMatrix);
            AsRenderSupport.setBlendFactors(pma, blendMode != null ? blendMode : this.getBlendMode());
            context.setProgram(AsStarling.getCurrent().getProgram(programName));
            context.setProgramConstantsFromVector(AsContext3DProgramType.VERTEX, 0, sRenderAlpha, 1);
            context.setProgramConstantsFromMatrix(AsContext3DProgramType.VERTEX, 1, sRenderMatrix, true);
            context.setVertexBufferAt(0, mVertexBuffer, AsVertexData.POSITION_OFFSET, AsContext3DVertexBufferFormat.FLOAT_2);
            if (mTexture == null || tinted)
            {
                context.setVertexBufferAt(1, mVertexBuffer, AsVertexData.COLOR_OFFSET, AsContext3DVertexBufferFormat.FLOAT_4);
            }
            if (mTexture != null)
            {
                context.setTextureAt(0, mTexture.get_base());
                context.setVertexBufferAt(2, mVertexBuffer, AsVertexData.TEXCOORD_OFFSET, AsContext3DVertexBufferFormat.FLOAT_2);
            }
            context.drawTriangles(mIndexBuffer, 0, mNumQuads * 2);
            if (mTexture != null)
            {
                context.setTextureAt(0, null);
                context.setVertexBufferAt(2, null);
            }
            context.setVertexBufferAt(1, null);
            context.setVertexBufferAt(0, null);
        }