love2d.love/src/modules/graphics/Canvas.cpp

/**
 * Copyright (c) 2006-2016 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.
 **/

#include "Canvas.h"
#include "Graphics.h"

namespace love
{
namespace graphics
{

love::Type Canvas::type("Canvas", &Texture::type);
int Canvas::canvasCount = 0;

Canvas::Canvas()
{
	canvasCount++;
}

Canvas::~Canvas()
{
	canvasCount--;
}

void Canvas::drawv(love::graphics::Graphics *gfx, const love::Matrix4 &t, const Vertex *v)
{
	if (gfx->isCanvasActive(this))
		throw love::Exception("Cannot render a Canvas to itself!");

	Texture::drawv(gfx, t, v);
}

} // graphics
} // love