From 3a78c62bb2334ed6b6d7fc23e717b08c1de2c2ef Mon Sep 17 00:00:00 2001
From: Kevin Ottens <kevin.ottens@kdab.com>
Date: Mon, 20 Mar 2017 12:53:13 +0100
Subject: [Shader Graph Gen.] Introduce QShaderNode

Nodes will allow to describe inputs, outputs or value transformations in
a shader graph.

Change-Id: I44f806d9595fd0e68fc9026cda2b4fa0a62af283
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>
---
 src/gui/util/qshadernode.cpp | 142 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 142 insertions(+)
 create mode 100644 src/gui/util/qshadernode.cpp

(limited to 'src/gui/util/qshadernode.cpp')

diff --git a/src/gui/util/qshadernode.cpp b/src/gui/util/qshadernode.cpp
new file mode 100644
index 0000000000..36fddb2235
--- /dev/null
+++ b/src/gui/util/qshadernode.cpp
@@ -0,0 +1,142 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 Klaralvdalens Datakonsult AB (KDAB).
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the Qt Quick Layouts 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 "qshadernode_p.h"
+
+QT_BEGIN_NAMESPACE
+
+QShaderNode::Type QShaderNode::type() const Q_DECL_NOTHROW
+{
+    int inputCount = 0;
+    int outputCount = 0;
+    for (const auto &port : qAsConst(m_ports)) {
+        switch (port.direction) {
+        case QShaderNodePort::Input:
+            inputCount++;
+            break;
+        case QShaderNodePort::Output:
+            outputCount++;
+            break;
+        }
+    }
+
+    return (inputCount == 0 && outputCount == 0) ? Invalid
+         : (inputCount > 0 && outputCount == 0) ? Output
+         : (inputCount == 0 && outputCount > 0) ? Input
+         : Function;
+}
+
+QUuid QShaderNode::uuid() const Q_DECL_NOTHROW
+{
+    return m_uuid;
+}
+
+void QShaderNode::setUuid(const QUuid &uuid) Q_DECL_NOTHROW
+{
+    m_uuid = uuid;
+}
+
+QVector<QShaderNodePort> QShaderNode::ports() const Q_DECL_NOTHROW
+{
+    return m_ports;
+}
+
+void QShaderNode::addPort(const QShaderNodePort &port)
+{
+    removePort(port);
+    m_ports.append(port);
+}
+
+void QShaderNode::removePort(const QShaderNodePort &port)
+{
+    const auto it = std::find_if(m_ports.begin(), m_ports.end(),
+                                 [port](const QShaderNodePort &p) {
+                                    return p.name == port.name;
+                                 });
+    if (it != m_ports.end())
+        m_ports.erase(it);
+}
+
+void QShaderNode::addRule(const QShaderFormat &format, const QShaderNode::Rule &rule)
+{
+    removeRule(format);
+    m_rules << qMakePair(format, rule);
+}
+
+void QShaderNode::removeRule(const QShaderFormat &format)
+{
+    const auto it = std::find_if(m_rules.begin(), m_rules.end(),
+                                 [format](const QPair<QShaderFormat, Rule> &entry) {
+                                     return entry.first == format;
+                                 });
+    if (it != m_rules.end())
+        m_rules.erase(it);
+}
+
+QVector<QShaderFormat> QShaderNode::availableFormats() const
+{
+    auto res = QVector<QShaderFormat>();
+    std::transform(m_rules.cbegin(), m_rules.cend(),
+                   std::back_inserter(res),
+                   [](const QPair<QShaderFormat, Rule> &entry) { return entry.first; });
+    return res;
+}
+
+QShaderNode::Rule QShaderNode::rule(const QShaderFormat &format) const
+{
+    const auto it = std::find_if(m_rules.crbegin(), m_rules.crend(),
+                                 [format](const QPair<QShaderFormat, Rule> &entry) {
+        return format.supports(entry.first);
+    });
+    return it != m_rules.crend() ? it->second : Rule();
+}
+
+QShaderNode::Rule::Rule(const QByteArray &subs, const QByteArrayList &snippets) Q_DECL_NOTHROW
+    : substitution(subs),
+      headerSnippets(snippets)
+{
+}
+
+bool operator==(const QShaderNode::Rule &lhs, const QShaderNode::Rule &rhs) Q_DECL_NOTHROW
+{
+    return lhs.substitution == rhs.substitution
+        && lhs.headerSnippets == rhs.headerSnippets;
+}
+
+QT_END_NAMESPACE
-- 
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