scope: implemented waveform scope

2020-04-20 22:58:29 +10:00
parent 9db82ddc2e
commit 6f4bf70d3e
30 changed files with 800 additions and 18 deletions
@@ -0,0 +1,82 @@
+
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2019 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 "waveform.h"
+
+#include "node/node.h"
+#include "render/backend/opengl/openglrenderfunctions.h"
+
+OLIVE_NAMESPACE_ENTER
+
+WaveformScope::WaveformScope(QWidget* parent) :
+  QOpenGLWidget(parent),
+  texture_(nullptr)
+{
+
+}
+
+void WaveformScope::SetTexture(OpenGLTexture *texture)
+{
+  texture_ = texture;
+
+  update();
+}
+
+void WaveformScope::initializeGL()
+{
+  pipeline_ = OpenGLShader::Create();
+  pipeline_->create();
+  pipeline_->addShaderFromSourceCode(QOpenGLShader::Vertex, OpenGLShader::CodeDefaultVertex());
+  pipeline_->addShaderFromSourceCode(QOpenGLShader::Fragment, Node::ReadFileAsString(":/shaders/rgbwaveform.frag"));
+  pipeline_->link();
+}
+
+void WaveformScope::paintGL()
+{
+  context()->functions()->glClearColor(0, 0, 0, 0);
+  context()->functions()->glClear(GL_COLOR_BUFFER_BIT);
+
+  if (!pipeline_ || !texture_) {
+    return;
+  }
+
+  pipeline_->bind();
+  pipeline_->setUniformValue("ove_resolution", texture_->width(), texture_->height());
+
+  // The general size of a pixel
+  pipeline_->setUniformValue("threshold", 2.0f / static_cast<float>(height()));
+
+  pipeline_->release();
+
+  texture_->Bind();
+
+  OpenGLRenderFunctions::Blit(pipeline_);
+
+  texture_->Release();
+}
+
+void WaveformScope::CleanUp()
+{
+  pipeline_ = nullptr;
+  texture_ = nullptr;
+}
+
+OLIVE_NAMESPACE_EXIT