Files
oak-editor/app/widget/scope/histogram/histogram.h
T
Mike-Solar 8d3bde5a50 Implement software scope rendering for backend-neutral display paths
The Waveform, Vectorscope and Histogram panels were black when running on
the Vulkan / backend-neutral render path because ScopeBase::OnPaint()
returned early with a TODO. The viewer emits GPU textures that live in the
viewer's own renderer; on Vulkan each ManagedDisplayWidget has a separate
device, so those textures cannot be sampled directly.

Fix by:

- Adding a backend-neutral branch in ScopeBase::OnPaint() that downloads the
  reference texture (cross-renderer if needed), color-manages it into a U8
  offscreen texture, downloads it to a QImage, and draws via QPainter.
- Adding a pure virtual DrawScopeSoftware() to ScopeBase and implementing it
  for WaveformScope, VectorscopeScope and HistogramScope.
- Fixing the managed_tex_up_to_date_ flag that was never set to true in the
  OpenGL path, which caused the color-managed scope texture to be recreated
  on every paint.

All gtest suites pass.
2026-07-13 10:19:30 +08:00

58 lines
1.4 KiB
C++

/***
Olive - Non-Linear Video Editor
Copyright (C) 2022 Olive Team
Modifications Copyright (C) 2025 mikesolar
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 HISTOGRAMSCOPE_H
#define HISTOGRAMSCOPE_H
#include "widget/scope/scopebase/scopebase.h"
namespace olive
{
class HistogramScope : public ScopeBase {
Q_OBJECT
public:
HistogramScope(QWidget *parent = nullptr);
MANAGEDDISPLAYWIDGET_DEFAULT_DESTRUCTOR(HistogramScope)
protected slots:
virtual void OnInit() override;
virtual void OnDestroy() override;
protected:
virtual ShaderCode GenerateShaderCode() override;
QVariant CreateSecondaryShader();
virtual void DrawScope(TexturePtr managed_tex, QVariant pipeline) override;
virtual void DrawScopeSoftware(QPainter &p, const QImage &image) override;
private:
QVariant pipeline_secondary_;
TexturePtr texture_row_sums_;
};
}
#endif // HISTOGRAMSCOPE_H