Loading...

XML

Word

Printable

Type: Suggestion
Resolution: Fixed
Priority: Not Evaluated
Fix Version/s: None
Affects Version/s: 6.3.0 RC
Component/s: Quick: SceneGraph
Labels:
None

Platform/s:

All

I use QtQuick with the wlroots library, use the QQuickRenderControl and QQuickRenderTarget(It's a OpenGL render buffer object, it's from a EGLImageKHR), to render a QQuickWindow to a wlr_output. but the vertical direction is reversed, in the Qt5, i can use the QQuickCustomRenderStage to set "QSGAbstraceRenderer::setProjectionMatrix", how do it on Qt6?

Maybe we should add a function to QQuickRenderControl to allow control the projection matrix, for a example:

class Q_QUICK_EXPORT QQuickRenderTarget
{
...
    virtual bool configureRenderer(QSGAbstractRenderer *renderer, QQuickWindow *window) const { return false; }
...
}

void QQuickWindowPrivate::renderSceneGraph(const QSize &size, const QSize &surfaceSize)
{
...
    if (!renderControl || !renderControl->configureRenderer(renderer, q))
          const bool flipY = rhi ? !rhi->isYUpInNDC() : false;
          QSGAbstractRenderer::MatrixTransformFlags matrixFlags;
          if (flipY)
              matrixFlags |= QSGAbstractRenderer::MatrixTransformFlipY;
          ...
    }
...
}