1 files changed, 101 insertions, 0 deletions
diff --git a/src/widgets/kernel/qrhiwidget.h b/src/widgets/kernel/qrhiwidget.h
new file mode 100644
index 0000000000..45fe7b7482
--- /dev/null
+++ b/src/widgets/kernel/qrhiwidget.h
@@ -0,0 +1,101 @@
+// Copyright (C) 2023 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+#ifndef QRHIWIDGET_H
+#define QRHIWIDGET_H
+
+#include <QtWidgets/qwidget.h>
+
+QT_BEGIN_NAMESPACE
+
+class QRhiWidgetPrivate;
+class QRhi;
+class QRhiTexture;
+class QRhiRenderBuffer;
+class QRhiRenderTarget;
+class QRhiCommandBuffer;
+
+class Q_WIDGETS_EXPORT QRhiWidget : public QWidget
+{
+    Q_OBJECT
+    Q_DECLARE_PRIVATE(QRhiWidget)
+    Q_PROPERTY(int sampleCount READ sampleCount WRITE setSampleCount NOTIFY sampleCountChanged)
+    Q_PROPERTY(TextureFormat colorBufferFormat READ colorBufferFormat WRITE setColorBufferFormat NOTIFY colorBufferFormatChanged)
+    Q_PROPERTY(QSize fixedColorBufferSize READ fixedColorBufferSize WRITE setFixedColorBufferSize NOTIFY fixedColorBufferSizeChanged)
+    Q_PROPERTY(bool mirrorVertically READ isMirrorVerticallyEnabled WRITE setMirrorVertically NOTIFY mirrorVerticallyChanged)
+    QDOC_PROPERTY(bool autoRenderTarget READ isAutoRenderTargetEnabled WRITE setAutoRenderTarget)
+
+public:
+    explicit QRhiWidget(QWidget *parent = nullptr, Qt::WindowFlags f = {});
+    ~QRhiWidget() override;
+
+    enum class Api {
+        Null,
+        OpenGL,
+        Metal,
+        Vulkan,
+        Direct3D11,
+        Direct3D12,
+    };
+    Q_ENUM(Api)
+
+    enum class TextureFormat {
+        RGBA8,
+        RGBA16F,
+        RGBA32F,
+        RGB10A2,
+    };
+    Q_ENUM(TextureFormat)
+
+    Api api() const;
+    void setApi(Api api);
+
+    bool isDebugLayerEnabled() const;
+    void setDebugLayerEnabled(bool enable);
+
+    int sampleCount() const;
+    void setSampleCount(int samples);
+
+    TextureFormat colorBufferFormat() const;
+    void setColorBufferFormat(TextureFormat format);
+
+    QSize fixedColorBufferSize() const;
+    void setFixedColorBufferSize(QSize pixelSize);
+    void setFixedColorBufferSize(int w, int h) { setFixedColorBufferSize(QSize(w, h)); }
+
+    bool isMirrorVerticallyEnabled() const;
+    void setMirrorVertically(bool enabled);
+
+    QImage grabFramebuffer() const;
+
+protected:
+    bool isAutoRenderTargetEnabled() const;
+    void setAutoRenderTarget(bool enabled);
+
+    virtual void initialize(QRhiCommandBuffer *cb);
+    virtual void render(QRhiCommandBuffer *cb);
+    virtual void releaseResources();
+
+    QRhi *rhi() const;
+    QRhiTexture *colorTexture() const;
+    QRhiRenderBuffer *msaaColorBuffer() const;
+    QRhiTexture *resolveTexture() const;
+    QRhiRenderBuffer *depthStencilBuffer() const;
+    QRhiRenderTarget *renderTarget() const;
+
+    void resizeEvent(QResizeEvent *e) override;
+    void paintEvent(QPaintEvent *e) override;
+    bool event(QEvent *e) override;
+
+Q_SIGNALS:
+    void frameSubmitted();
+    void renderFailed();
+    void sampleCountChanged(int samples);
+    void colorBufferFormatChanged(TextureFormat format);
+    void fixedColorBufferSizeChanged(const QSize &pixelSize);
+    void mirrorVerticallyChanged(bool enabled);
+};
+
+QT_END_NAMESPACE
+
+#endif