164 lines
3.6 KiB
C++
164 lines
3.6 KiB
C++
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/***
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Olive - Non-Linear Video Editor
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Copyright (C) 2019 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 "waveform.h"
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#include "node/node.h"
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#include "render/backend/opengl/openglrenderfunctions.h"
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OLIVE_NAMESPACE_ENTER
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WaveformScope::WaveformScope(QWidget* parent) :
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ManagedDisplayWidget(parent),
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buffer_(nullptr)
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{
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EnableDefaultContextMenu();
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}
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WaveformScope::~WaveformScope()
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{
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CleanUp();
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if (context()) {
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disconnect(context(), &QOpenGLContext::aboutToBeDestroyed, this, &WaveformScope::CleanUp);
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}
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}
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void WaveformScope::SetBuffer(Frame *frame)
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{
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buffer_ = frame;
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UploadTextureFromBuffer();
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}
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void WaveformScope::showEvent(QShowEvent* e)
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{
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ManagedDisplayWidget::showEvent(e);
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UploadTextureFromBuffer();
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}
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void WaveformScope::initializeGL()
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{
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ManagedDisplayWidget::initializeGL();
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pipeline_ = OpenGLShader::Create();
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pipeline_->create();
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pipeline_->addShaderFromSourceCode(QOpenGLShader::Vertex, OpenGLShader::CodeDefaultVertex());
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pipeline_->addShaderFromSourceCode(QOpenGLShader::Fragment, Node::ReadFileAsString(":/shaders/rgbwaveform.frag"));
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pipeline_->link();
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framebuffer_.Create(context());
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connect(context(), &QOpenGLContext::aboutToBeDestroyed, this, &WaveformScope::CleanUp, Qt::DirectConnection);
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UploadTextureFromBuffer();
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}
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void WaveformScope::paintGL()
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{
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QOpenGLFunctions* f = context()->functions();
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f->glClearColor(0, 0, 0, 0);
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f->glClear(GL_COLOR_BUFFER_BIT);
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if (!pipeline_ || !texture_.IsCreated()) {
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return;
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}
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{
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// Convert reference frame to display space
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framebuffer_.Attach(&managed_tex_);
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framebuffer_.Bind();
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texture_.Bind();
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f->glViewport(0, 0, texture_.width(), texture_.height());
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color_service()->ProcessOpenGL();
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texture_.Release();
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framebuffer_.Release();
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framebuffer_.Detach();
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}
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{
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// Draw waveform through shader
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pipeline_->bind();
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pipeline_->setUniformValue("ove_resolution", texture_.width(), texture_.height());
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pipeline_->setUniformValue("ove_viewport", width(), height());
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// The general size of a pixel
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pipeline_->setUniformValue("threshold", 2.0f / static_cast<float>(height()));
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pipeline_->release();
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f->glViewport(0, 0, width(), height());
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managed_tex_.Bind();
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OpenGLRenderFunctions::Blit(pipeline_);
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managed_tex_.Release();
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}
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}
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void WaveformScope::UploadTextureFromBuffer()
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{
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if (!buffer_ || !isVisible()) {
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return;
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}
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makeCurrent();
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if (!texture_.IsCreated()
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|| texture_.width() != buffer_->width()
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|| texture_.height() != buffer_->height()
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|| texture_.format() != buffer_->format()) {
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texture_.Destroy();
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managed_tex_.Destroy();
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texture_.Create(context(), buffer_);
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managed_tex_.Create(context(), buffer_->width(), buffer_->height(), buffer_->format());
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} else {
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texture_.Upload(buffer_);
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}
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doneCurrent();
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update();
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}
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void WaveformScope::CleanUp()
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{
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makeCurrent();
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pipeline_ = nullptr;
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texture_.Destroy();
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managed_tex_.Destroy();
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framebuffer_.Destroy();
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doneCurrent();
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}
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OLIVE_NAMESPACE_EXIT
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