scopes: moved all shared code to a base class to easily add more scopes

2020-05-05 02:41:16 +10:00
parent 30efe054c7
commit 51c896ed7e
8 changed files with 310 additions and 409 deletions
@@ -0,0 +1,163 @@
+/***
+
+  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 "scopebase.h"
+
+#include "render/backend/opengl/openglrenderfunctions.h"
+
+OLIVE_NAMESPACE_ENTER
+
+ScopeBase::ScopeBase(QWidget* parent) :
+  ManagedDisplayWidget(parent),
+  buffer_(nullptr)
+{
+  EnableDefaultContextMenu();
+}
+
+ScopeBase::~ScopeBase()
+{
+  CleanUp();
+
+  if (context()) {
+    disconnect(context(), &QOpenGLContext::aboutToBeDestroyed, this, &ScopeBase::CleanUp);
+  }
+}
+
+void ScopeBase::SetBuffer(Frame *frame)
+{
+  buffer_ = frame;
+
+  UploadTextureFromBuffer();
+}
+
+void ScopeBase::showEvent(QShowEvent* e)
+{
+  ManagedDisplayWidget::showEvent(e);
+
+  UploadTextureFromBuffer();
+}
+
+OpenGLShaderPtr ScopeBase::CreateShader()
+{
+  return OpenGLShader::CreateDefault();
+}
+
+void ScopeBase::DrawScope()
+{
+  managed_tex().Bind();
+
+  OpenGLRenderFunctions::Blit(pipeline());
+
+  managed_tex().Release();
+}
+
+OpenGLShaderPtr ScopeBase::pipeline()
+{
+  return pipeline_;
+}
+
+OpenGLTexture &ScopeBase::managed_tex()
+{
+  return managed_tex_;
+}
+
+void ScopeBase::UploadTextureFromBuffer()
+{
+  if (!isVisible()) {
+    return;
+  }
+
+  if (buffer_) {
+    makeCurrent();
+
+    if (!texture_.IsCreated()
+        || texture_.width() != buffer_->width()
+        || texture_.height() != buffer_->height()
+        || texture_.format() != buffer_->format()) {
+      texture_.Destroy();
+      managed_tex_.Destroy();
+
+      texture_.Create(context(), buffer_);
+      managed_tex_.Create(context(), buffer_->video_params());
+    } else {
+      texture_.Upload(buffer_);
+    }
+
+    doneCurrent();
+  }
+
+  update();
+}
+
+void ScopeBase::CleanUp()
+{
+  makeCurrent();
+
+  pipeline_ = nullptr;
+  texture_.Destroy();
+  managed_tex_.Destroy();
+  framebuffer_.Destroy();
+
+  doneCurrent();
+}
+
+void ScopeBase::initializeGL()
+{
+  ManagedDisplayWidget::initializeGL();
+
+  pipeline_ = CreateShader();
+
+  framebuffer_.Create(context());
+
+  connect(context(), &QOpenGLContext::aboutToBeDestroyed, this, &ScopeBase::CleanUp, Qt::DirectConnection);
+
+  UploadTextureFromBuffer();
+}
+
+void ScopeBase::paintGL()
+{
+  QOpenGLFunctions* f = context()->functions();
+
+  f->glClearColor(0, 0, 0, 0);
+  f->glClear(GL_COLOR_BUFFER_BIT);
+
+  if (buffer_ && pipeline() && texture_.IsCreated()) {
+    // Convert reference frame to display space
+    framebuffer_.Attach(&managed_tex_);
+    framebuffer_.Bind();
+
+    texture_.Bind();
+
+    f->glViewport(0, 0, texture_.width(), texture_.height());
+
+    color_service()->ProcessOpenGL();
+
+    texture_.Release();
+
+    framebuffer_.Release();
+    framebuffer_.Detach();
+
+    f->glViewport(0, 0, width(), height());
+
+    DrawScope();
+  }
+}
+
+OLIVE_NAMESPACE_EXIT