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/* === S Y N F I G ========================================================= */
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/*! \file synfig/rendering/common/task/taskblend.cpp
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** \brief TaskBlend
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**
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** $Id$
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**
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** \legal
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** ......... ... 2015-2018 Ivan Mahonin
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**
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** This package is free software; you can redistribute it and/or
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** modify it under the terms of the GNU General Public License as
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** published by the Free Software Foundation; either version 2 of
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** the License, or (at your option) any later version.
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**
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** This package is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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** General Public License for more details.
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** \endlegal
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*/
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/* ========================================================================= */
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/* === H E A D E R S ======================================================= */
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#ifdef USING_PCH
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# include "pch.h"
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#else
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#ifdef HAVE_CONFIG_H
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# include <config.h></config.h>
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#endif
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#include "taskblend.h"
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#endif
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using namespace synfig;
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using namespace rendering;
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/* === M A C R O S ========================================================= */
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/* === G L O B A L S ======================================================= */
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/* === P R O C E D U R E S ================================================= */
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/* === M E T H O D S ======================================================= */
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Task::Token TaskBlend::token(
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DescAbstract<taskblend>("Blend") );</taskblend>
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int
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TaskBlend::get_pass_subtask_index() const
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{
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bool a = (bool)sub_task_a();
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bool b = (bool)sub_task_b();
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if (!a && !b)
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return PASSTO_NO_TASK;
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if (!a && Color::is_onto(blend_method))
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return PASSTO_NO_TASK;
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if (blend_method == Color::BLEND_COMPOSITE) {
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if (!b)
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return 0;
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if (approximate_equal_lp(amount, ColorReal(0.0)))
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return a ? 0 : PASSTO_NO_TASK;
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if (!a && approximate_equal_lp(amount, ColorReal(1.0)))
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return 1;
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}
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return PASSTO_THIS_TASK;
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}
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Rect
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TaskBlend::calc_bounds() const
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{
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Rect ra = sub_task_a() ? sub_task_a()->get_bounds() : Rect::zero();
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Rect rb = sub_task_b() ? sub_task_b()->get_bounds() : Rect::zero();
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Rect bounds = ra | rb;
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if (Color::is_onto(blend_method))
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bounds &= ra;
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if (approximate_equal(amount, Color::value_type(1)) && Color::is_straight(blend_method))
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bounds &= rb;
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return bounds;
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}
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/* === E N T R Y P O I N T ================================================= */
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