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/****************************************************************************
**
** Copyright (C) 2017 Klaralvdalens Datakonsult AB (KDAB).
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qshadergenerator_p.h"
QT_BEGIN_NAMESPACE
QByteArray QShaderGenerator::createShaderCode() const
{
auto code = QByteArrayList();
if (format.isValid()) {
const auto isGLES = format.api() == QShaderFormat::OpenGLES;
const auto major = format.version().majorVersion();
const auto minor = format.version().minorVersion();
const auto version = major == 2 && isGLES ? 100
: major == 3 && isGLES ? 300
: major == 2 ? 100 + 10 * (minor + 1)
: major == 3 && minor <= 2 ? 100 + 10 * (minor + 3)
: major * 100 + minor * 10;
const auto profile = isGLES ? QByteArrayLiteral(" es")
: version >= 150 && format.api() == QShaderFormat::OpenGLCoreProfile ? QByteArrayLiteral(" core")
: version >= 150 && format.api() == QShaderFormat::OpenGLCompatibilityProfile ? QByteArrayLiteral(" compatibility")
: QByteArray();
code << (QByteArrayLiteral("#version ") + QByteArray::number(version) + profile);
code << QByteArray();
}
for (const auto &node : graph.nodes()) {
for (const auto &snippet : node.rule(format).headerSnippets) {
code << snippet;
}
}
code << QByteArray();
code << QByteArrayLiteral("void main()");
code << QByteArrayLiteral("{");
for (const auto &statement : graph.createStatements()) {
const auto node = statement.node;
auto line = node.rule(format).substitution;
for (const auto &port : node.ports()) {
const auto portName = port.name;
const auto portDirection = port.direction;
const auto isInput = port.direction == QShaderNodePort::Input;
const auto portIndex = statement.portIndex(portDirection, portName);
const auto variableIndex = isInput ? statement.inputs.at(portIndex)
: statement.outputs.at(portIndex);
if (variableIndex < 0)
continue;
const auto placeholder = QByteArray(QByteArrayLiteral("$") + portName.toUtf8());
const auto variable = QByteArray(QByteArrayLiteral("v") + QByteArray::number(variableIndex));
line.replace(placeholder, variable);
}
code << QByteArrayLiteral(" ") + line;
}
code << QByteArrayLiteral("}");
code << QByteArray();
return code.join('\n');
}
QT_END_NAMESPACE
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