itsmattkc
81c1922911
This makes the node system somewhat more high-level with the intent of making working with them far more flexible and stable. By making the architecture more abstracted, it becomes far less rigid which should allow us to do even more with it and make it much less crash prone.
136 lines
3.7 KiB
C++
136 lines
3.7 KiB
C++
/***
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Olive - Non-Linear Video Editor
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Copyright (C) 2020 Olive Team
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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***/
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#include "merge.h"
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namespace olive {
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const QString MergeNode::kBaseIn = QStringLiteral("base_in");
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const QString MergeNode::kBlendIn = QStringLiteral("blend_in");
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MergeNode::MergeNode()
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{
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AddInput(kBaseIn, NodeValue::kTexture, InputFlags(kInputFlagNotKeyframable));
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AddInput(kBlendIn, NodeValue::kTexture, InputFlags(kInputFlagNotKeyframable));
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}
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Node *MergeNode::copy() const
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{
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return new MergeNode();
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}
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QString MergeNode::Name() const
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{
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return tr("Merge");
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}
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QString MergeNode::id() const
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{
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return QStringLiteral("org.olivevideoeditor.Olive.merge");
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}
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QVector<Node::CategoryID> MergeNode::Category() const
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{
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return {kCategoryMath};
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}
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QString MergeNode::Description() const
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{
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return tr("Merge two textures together.");
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}
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void MergeNode::Retranslate()
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{
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SetInputName(kBaseIn, tr("Base"));
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SetInputName(kBlendIn, tr("Blend"));
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}
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ShaderCode MergeNode::GetShaderCode(const QString &shader_id) const
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{
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Q_UNUSED(shader_id)
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return ShaderCode(FileFunctions::ReadFileAsString(":/shaders/alphaover.frag"));
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}
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NodeValueTable MergeNode::Value(const QString &output, NodeValueDatabase &value) const
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{
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Q_UNUSED(output)
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ShaderJob job;
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job.InsertValue(this, kBaseIn, value);
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job.InsertValue(this, kBlendIn, value);
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NodeValueTable table = value.Merge();
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TexturePtr base_tex = job.GetValue(kBaseIn).data().value<TexturePtr>();
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TexturePtr blend_tex = job.GetValue(kBlendIn).data().value<TexturePtr>();
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if (base_tex || blend_tex) {
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if (!base_tex || (blend_tex && blend_tex->channel_count() < VideoParams::kRGBAChannelCount)) {
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// We only have a blend texture or the blend texture is RGB only, no need to alpha over
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table.Push(job.GetValue(kBlendIn));
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} else if (!blend_tex) {
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// We only have a base texture, no need to alpha over
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table.Push(job.GetValue(kBaseIn));
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} else {
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// We have both textures, push the job
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table.Push(NodeValue::kShaderJob, QVariant::fromValue(job), this);
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}
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}
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return table;
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}
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void MergeNode::Hash(QCryptographicHash &hash, const rational &time) const
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{
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// We do some hash optimization here. If only one of the inputs is connected, this node
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// functions as a passthrough so there's no alteration to the hash. The same is true if the
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// connected node happens to return nothing (a gap for instance). Therefore we only add our
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// fingerprint if the base AND the blend change the hash. Otherwise, we assume it's a passthrough.
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QByteArray current_result = hash.result();
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bool base_changed_hash = false;
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bool blend_changed_hash = false;
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if (IsInputConnected(kBaseIn)) {
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GetConnectedNode(kBaseIn)->Hash(hash, time);
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QByteArray post_base_hash = hash.result();
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base_changed_hash = (post_base_hash != current_result);
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current_result = post_base_hash;
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}
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if(IsInputConnected(kBlendIn)) {
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GetConnectedNode(kBlendIn)->Hash(hash, time);
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blend_changed_hash = (hash.result() != current_result);
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}
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if (base_changed_hash && blend_changed_hash) {
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// Something changed, so we'll add our fingerprint
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hash.addData(id().toUtf8());
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}
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}
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}
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