ZoneShaderNodeRhi.h

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// SPDX-FileCopyrightText: 2026 fuddlesworth
// SPDX-License-Identifier: LGPL-2.1-or-later
 
#pragma once
 
#include <PhosphorRendering/ShaderNodeRhi.h>
#include <PhosphorRendering/ZoneLabelTexture.h>
#include <PhosphorRendering/ZoneShaderCommon.h>
#include <PhosphorRendering/phosphorrendering_export.h>
 
#include <QImage>
#include <QQuickItem>
 
#include <memory>
 
#include <rhi/qrhi.h>
 
namespace PhosphorRendering {
 
class PHOSPHORRENDERING_EXPORT ZoneShaderNodeRhi : public ShaderNodeRhi
{
public:
    explicit ZoneShaderNodeRhi(QQuickItem* item);
    ~ZoneShaderNodeRhi() override;
 
    quint64 instanceId() const
    {
        return m_instanceId;
    }
 
    void setZoneCounts(int total, int highlighted);
 
    void setLabelsTexture(const ZoneLabelTexture& labels);
 
    void prepare() override;
    void releaseResources() override;
 
private:
    void uploadLabelsTexture(QRhi* rhi, QRhiCommandBuffer* cb);
 
    ZoneLabelTexture m_labels;
    QList<QRect> m_prevTileRects;
    bool m_labelsNeedFullClear = false;
    std::unique_ptr<QRhiTexture> m_labelsTexture;
    std::unique_ptr<QRhiSampler> m_labelsSampler;
    quint64 m_instanceId = 0;
    bool m_labelsTextureDirty = false;
    bool m_labelsInitialized = false;
    // Cap how many times we retry RHI texture/sampler creation. Without a cap,
    // a permanent failure (driver wedged, persistent OOM) turns prepare() into
    // a hot loop that runs init + logs every frame forever. The vertex-shader
    // load in tools/shader-render's RenderEffect uses the same one-shot-latch
    // pattern; we mirror it here for the daemon's render path.
    int m_labelsInitFailureCount = 0;
    bool m_labelsInitGaveUp = false;
};
 
} // namespace PhosphorRendering