/*
 Copyright (c) 2013 yvt
 
 This file is part of OpenSpades.
 
 OpenSpades is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.
 
 OpenSpades is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
 
 You should have received a copy of the GNU General Public License
 along with OpenSpades.  If not, see <http://www.gnu.org/licenses/>.
 
 */

#include "GLQuadRenderer.h"
#include "GLProgramAttribute.h"
#include <stdint.h>

namespace spades {
	namespace draw {
		GLQuadRenderer::GLQuadRenderer(IGLDevice *device):
		device(device){
			
		}
		
		GLQuadRenderer::~GLQuadRenderer(){
			
		}
		
		void GLQuadRenderer::SetCoordAttributeIndex(IGLDevice::UInteger idx){
			attrIndex = idx;
			
		}
		
		void GLQuadRenderer::Draw(){
			static const uint8_t vertices[][4]={
				{0,0}, {1,0}, {1,1}, {0,1}
			};
			
			device->EnableVertexAttribArray(attrIndex, true);
			device->VertexAttribPointer(attrIndex, 2,
										IGLDevice::UnsignedByte, false,
										4, vertices);
			device->DrawArrays(IGLDevice::TriangleFan, 0, 4);
			device->EnableVertexAttribArray(attrIndex, false);
		}
	}
}