Add Flip/Flop node (#1850)

* Add Flip/Flop node

* Rename node Flip

* Missed files

Co-authored-by: itsmattkc <34096995+itsmattkc@users.noreply.github.com>

app/node/distort/CMakeLists.txt

@@ -15,6 +15,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 add_subdirectory(crop)
+add_subdirectory(flip)
 add_subdirectory(transform)
 
 set(OLIVE_SOURCES

app/node/distort/flip/CMakeLists.txt

@@ -0,0 +1,22 @@
+# Olive - Non-Linear Video Editor
+# Copyright (C) 2021 Olive Team
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program 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 for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+set(OLIVE_SOURCES
+  ${OLIVE_SOURCES}
+  node/distort/flip/flipdistortnode.cpp
+  node/distort/flip/flipdistortnode.h
+  PARENT_SCOPE
+)

app/node/distort/flip/flipdistortnode.cpp

@@ -0,0 +1,95 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2021 Olive Team
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program 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 for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
+#include "flipdistortnode.h"
+
+namespace olive {
+
+const QString FlipDistortNode::kTextureInput = QStringLiteral("tex_in");
+const QString FlipDistortNode::kHorizontalInput = QStringLiteral("horiz_in");
+const QString FlipDistortNode::kVerticalInput = QStringLiteral("vert_in");
+
+FlipDistortNode::FlipDistortNode()
+{
+  AddInput(kTextureInput, NodeValue::kTexture, InputFlags(kInputFlagNotKeyframable));
+
+  AddInput(kHorizontalInput, NodeValue::kBoolean, false);
+
+  AddInput(kVerticalInput, NodeValue::kBoolean, false);
+}
+
+Node* FlipDistortNode::copy() const
+{
+  return new FlipDistortNode();
+}
+
+QString FlipDistortNode::Name() const
+{
+  return tr("Flip");
+}
+
+QString FlipDistortNode::id() const
+{
+  return QStringLiteral("org.oliveeditor.Olive.flip");
+}
+
+QVector<Node::CategoryID> FlipDistortNode::Category() const
+{
+  return {kCategoryDistort};
+}
+
+QString FlipDistortNode::Description() const
+{
+  return tr("Flips an image horizontally or vertically");
+}
+
+void FlipDistortNode::Retranslate()
+{
+  SetInputName(kTextureInput, tr("Input"));
+  SetInputName(kHorizontalInput, tr("Horizontal"));
+  SetInputName(kVerticalInput, tr("Vertical"));
+}
+
+ShaderCode FlipDistortNode::GetShaderCode(const QString& shader_id) const
+{
+  Q_UNUSED(shader_id)
+  return ShaderCode(FileFunctions::ReadFileAsString(":/shaders/flip.frag"));
+}
+
+void FlipDistortNode::Value(const NodeValueRow &value, const NodeGlobals &globals, NodeValueTable *table) const
+{
+  ShaderJob job;
+
+  job.InsertValue(value);
+
+  // If there's no texture, no need to run an operation
+  if (!job.GetValue(kTextureInput).data().isNull()) {
+    // Only run shader if at least one of flip or flop are selected
+    if (job.GetValue(kHorizontalInput).data().toBool() || job.GetValue(kVerticalInput).data().toBool()) {
+      table->Push(NodeValue::kShaderJob, QVariant::fromValue(job), this);
+    } else {
+    // If we're not flipping or flopping just push the texture
+    table->Push(job.GetValue(kTextureInput));
+    }
+  }
+
+}
+
+}

app/node/distort/flip/flipdistortnode.h

@@ -0,0 +1,56 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2021 Olive Team
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program 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 for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
+#ifndef FLIPDISTORTNODE_H
+#define FLIPDISTORTNODE_H
+
+#include "node/node.h"
+
+namespace olive {
+
+class FlipDistortNode : public Node
+{
+  Q_OBJECT
+public:
+  FlipDistortNode();
+
+  NODE_DEFAULT_DESTRUCTOR(FlipDistortNode)
+
+  virtual Node* copy() const override;
+
+  virtual QString Name() const override;
+  virtual QString id() const override;
+  virtual QVector<CategoryID> Category() const override;
+  virtual QString Description() const override;
+
+  virtual void Retranslate() override;
+
+  virtual ShaderCode GetShaderCode(const QString &shader_id) const override;
+  virtual void Value(const NodeValueRow& value, const NodeGlobals &globals, NodeValueTable *table) const override;
+
+  static const QString kTextureInput;
+  static const QString kHorizontalInput;
+  static const QString kVerticalInput;
+
+};
+
+}
+
+#endif // FLIPDISTORTNODE_H

app/node/factory.cpp

@@ -30,6 +30,7 @@
 #include "block/transition/crossdissolve/crossdissolvetransition.h"
 #include "block/transition/diptocolor/diptocolortransition.h"
 #include "distort/crop/cropdistortnode.h"
+#include "distort/flip/flipdistortnode.h"
 #include "distort/transform/transformdistortnode.h"
 #include "effect/opacity/opacityeffect.h"
 #include "generator/matrix/matrix.h"
@@ -256,6 +257,8 @@ Node *NodeFactory::CreateFromFactoryIndex(const NodeFactory::InternalID &id)
     return new NodeGroup();
   case kOpacityEffect:
     return new OpacityEffect();
+  case kFlipDistort:
+    return new FlipDistortNode();
   case kNoiseGenerator:
     return new NoiseGeneratorNode();
 

app/node/factory.h

@@ -63,6 +63,7 @@ public:
     kShapeGenerator,
     kGroupNode,
     kOpacityEffect,
+    kFlipDistort,
     kNoiseGenerator,
 
     // Count value

app/shaders/flip.frag

@@ -0,0 +1,19 @@
+uniform sampler2D tex_in;
+uniform bool horiz_in;
+uniform bool vert_in;
+
+varying vec2 ove_texcoord;
+
+void main(void) {
+    if (!horiz_in && !vert_in) {
+        gl_FragColor = texture2D(tex_in, ove_texcoord);
+        return;
+    }
+
+    vec2 new_coord = ove_texcoord;
+
+    if (horiz_in) new_coord.x = 1.0 - new_coord.x;
+    if (vert_in) new_coord.y = 1.0 - new_coord.y;
+
+    gl_FragColor = texture2D(tex_in, new_coord);
+}