text: /**
   * Copyright (c) 2006-2015 LOVE Development Team
   *
   * This software is provided 'as-is', without any express or implied
   * warranty.  In no event will the authors be held liable for any damages
   * arising from the use of this software.
   *
   * Permission is granted to anyone to use this software for any purpose,
   * including commercial applications, and to alter it and redistribute it
   * freely, subject to the following restrictions:
   *
   * 1. The origin of this software must not be misrepresented; you must not
   *    claim that you wrote the original software. If you use this software
   *    in a product, an acknowledgment in the product documentation would be
   *    appreciated but is not required.
   * 2. Altered source versions must be plainly marked as such, and must not be
   *    misrepresented as being the original software.
   * 3. This notice may not be removed or altered from any source distribution.
   **/
  
  // LOVE
  #include "Quad.h"
  
  // C
  #include <cstring> // For memcpy
  
  namespace love
  {
  namespace graphics
  {
  
  Quad::Quad(const Quad::Viewport &v, float sw, float sh)
  	: sw(sw)
  	, sh(sh)
  {
  	memset(vertices, 255, sizeof(Vertex) * 4);
  	refresh(v, sw, sh);
  }
  
  Quad::~Quad()
  {
  }
  
  void Quad::refresh(const Quad::Viewport &v, float sw, float sh)
  {
  	viewport = v;
  
  	// Vertices are ordered for use with triangle strips:
  	// 0----2
  	// |  / |
  	// | /  |
  	// 1----3
  	vertices[0].x = 0.0f;
  	vertices[0].y = 0.0f;
  	vertices[1].x = 0.0f;
  	vertices[1].y = v.h;
  	vertices[2].x = v.w;
  	vertices[2].y = 0.0f;
  	vertices[3].x = v.w;
  	vertices[3].y = v.h;
  
  	vertices[0].s = v.x/sw;
  	vertices[0].t = v.y/sh;
  	vertices[1].s = v.x/sw;
  	vertices[1].t = (v.y+v.h)/sh;
  	vertices[2].s = (v.x+v.w)/sw;
  	vertices[2].t = v.y/sh;
  	vertices[3].s = (v.x+v.w)/sw;
  	vertices[3].t = (v.y+v.h)/sh;
  }
  
  void Quad::setViewport(const Quad::Viewport &v)
  {
  	refresh(v, sw, sh);
  }
  
  Quad::Viewport Quad::getViewport() const
  {
  	return viewport;
  }
  
  const Vertex *Quad::getVertices() const
  {
  	return vertices;
  }
  
  } // graphics
  } // love
  