jsl-prism.MaskDrawSemiRoundRect.jsl Maven / Gradle / Ivy
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This contains the native files for the backport of OpenJFX 8 to run on Java 7.
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/*
* Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
param float2 oinvarcradii;
param float2 idim;
// See MaskFillRoundRect.jsl and MaskFillPgram.jsl for a description of the
// coordinate systems and parameters used by those calculations. This shader
// is a hybrid that simply performs each of those calculations, the round
// rect calculations with the values for the outer round rect and the pgram
// calculations with the values for the inner round rect, then subtracts the
// 2 coverages.
float rrmask(float2 abstco, float2 flatdim, float2 invarcradii)
{
float2 ecctco = max(abstco - flatdim, 0.001) * invarcradii;
float ecclensq = dot(ecctco, ecctco);
float pix = dot(ecctco / ecclensq, invarcradii);
return clamp(0.5 + (1.0 + 0.25*pix*pix - ecclensq)/(2.0*pix), 0.0, 1.0);
}
float pgrammask(float2 abstco, float2 tcc)
{
float2 cov = clamp(tcc + 0.5 - abstco, 0.0, 1.0);
cov = min(cov, tcc * 2.0);
return cov.x * cov.y;
}
float mask(float2 tco, float2 oflatdim)
{
float2 abstco = abs(tco);
float ocov = rrmask(abstco, oflatdim, oinvarcradii);
float icov = pgrammask(abstco, idim);
return clamp(ocov - icov, 0.0, 1.0);
}