qt-everywhere-src-5.15.1/qtbase/src/plugins/platforms/openwfd/qopenwfdoutputbuffer.cpp

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#include "qopenwfdoutputbuffer.h"

#include "qopenwfdport.h"

QOpenWFDOutputBuffer::QOpenWFDOutputBuffer(const QSize &size, QOpenWFDPort *port)
    : mPort(port)
    , mAvailable(true)
{
    qDebug() << "creating output buffer for size" << size;
    glGenRenderbuffers(1,&mRbo);
    glBindRenderbuffer(GL_RENDERBUFFER, mRbo);

    mGbm_buffer = gbm_bo_create(port->device()->gbmDevice(),
                  size.width(),
                  size.height(),
                  GBM_BO_FORMAT_XRGB8888,
                  GBM_BO_USE_SCANOUT | GBM_BO_USE_RENDERING);

    mEglImage = port->device()->eglCreateImage(port->device()->eglDisplay(),0, EGL_NATIVE_PIXMAP_KHR, mGbm_buffer, 0);

    port->device()->glEglImageTargetRenderBufferStorage(GL_RENDERBUFFER,mEglImage);

    mWfdSource = wfdCreateSourceFromImage(port->device()->handle(),port->pipeline(),mEglImage,WFD_NONE);
    if (mWfdSource == WFD_INVALID_HANDLE) {
        qWarning("failed to create wfdSource from image");
    }
}

QOpenWFDOutputBuffer::~QOpenWFDOutputBuffer()
{
    wfdDestroySource(mPort->device()->handle(),mWfdSource);
    if (!mPort->device()->eglDestroyImage(mPort->device()->eglDisplay(),mEglImage)) {
        qDebug("could not delete eglImage");
    }
    gbm_bo_destroy(mGbm_buffer);

    glDeleteRenderbuffers(1, &mRbo);
}

void QOpenWFDOutputBuffer::bindToCurrentFbo()
{
    glFramebufferRenderbuffer(GL_FRAMEBUFFER,
                              GL_COLOR_ATTACHMENT0,
                              GL_RENDERBUFFER,
                              mRbo);
    if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
        qDebug("framebuffer not ready!");
    }
}