QWaylandReadbackEglContext Class Reference

#include <qwaylandreadbackeglcontext.h>

Inheritance diagram for QWaylandReadbackEglContext:

Public Functions
void	doneCurrent ()
	Reimplement in subclass to release current context. More...
void	geometryChanged ()
void *	getProcAddress (const QString &procName)
	Reimplement in subclass to native getProcAddr calls. More...
void	makeCurrent ()
	Reimplement in subclass to do makeCurrent on native GL context. More...
virtual QPlatformWindowFormat	platformWindowFormat () const
	QWidget has the function qplatformWindowFormat(). More...
	QWaylandReadbackEglContext (QWaylandReadbackEglIntegration *eglIntegration, QWaylandReadbackEglWindow *window)
void	swapBuffers ()
	Reimplement in subclass to native swap buffers calls. More...
	~QWaylandReadbackEglContext ()
Public Functions inherited from QPlatformGLContext
	QPlatformGLContext ()
	All subclasses needs to specify the platformWindow. More...
virtual	~QPlatformGLContext ()
	If this is the current context for the thread, doneCurrent is called. More...

Properties
QWaylandShmBuffer *	mBuffer
EGLConfig	mConfig
EGLContext	mContext
QWaylandReadbackEglIntegration *	mEglIntegration
Pixmap	mPixmap
EGLSurface	mPixmapSurface
QWaylandReadbackEglWindow *	mWindow

Additional Inherited Members
Static Public Functions inherited from QPlatformGLContext
static const QPlatformGLContext *	currentContext ()
	Returns the last context which called makeCurrent. More...
Protected Variables inherited from QPlatformGLContext
QScopedPointer< QPlatformGLContextPrivate >	d_ptr

Detailed Description

Definition at line 53 of file qwaylandreadbackeglcontext.h.

Constructors and Destructors

QWaylandReadbackEglContext()

QWaylandReadbackEglContext::QWaylandReadbackEglContext	(	QWaylandReadbackEglIntegration *	eglIntegration,
		QWaylandReadbackEglWindow *	window
	)

Definition at line 75 of file qwaylandreadbackeglcontext.cpp.

    : mEglIntegration(eglIntegration)
    , mWindow(window)
    , mBuffer(0)
    , mPixmap(0)
    , mConfig(q_configFromQPlatformWindowFormat(eglIntegration->eglDisplay(),window->widget()->platformWindowFormat(),true,EGL_PIXMAP_BIT))
    , mPixmapSurface(EGL_NO_SURFACE)
{
    QVector<EGLint> eglContextAttrs;
    eglContextAttrs.append(EGL_CONTEXT_CLIENT_VERSION);
    eglContextAttrs.append(2);
    eglContextAttrs.append(EGL_NONE);

    mContext = eglCreateContext(eglIntegration->eglDisplay(),mConfig,0,eglContextAttrs.constData());

    geometryChanged();
}

~QWaylandReadbackEglContext()

QWaylandReadbackEglContext::~QWaylandReadbackEglContext

(

)

Definition at line 93 of file qwaylandreadbackeglcontext.cpp.

{
    eglDestroyContext(mEglIntegration->eglDisplay(),mContext);
}

Functions

doneCurrent()

void QWaylandReadbackEglContext::doneCurrent ( )

virtual

Reimplement in subclass to release current context.

Typically this is calling makeCurrent with 0 "surface"

Reimplemented from QPlatformGLContext.

Definition at line 107 of file qwaylandreadbackeglcontext.cpp.

{
    QPlatformGLContext::doneCurrent();
    eglMakeCurrent(mEglIntegration->eglDisplay(),EGL_NO_SURFACE,EGL_NO_SURFACE,EGL_NO_CONTEXT);
}

geometryChanged()

void QWaylandReadbackEglContext::geometryChanged

(

)

Definition at line 151 of file qwaylandreadbackeglcontext.cpp.

Referenced by QWaylandReadbackEglContext(), and QWaylandReadbackEglWindow::setGeometry().

{
    QSize size(mWindow->geometry().size());
    if (size.isEmpty()) {
        //QGLWidget wants a context for a window without geometry
        size = QSize(1,1);
    }

    mWindow->waitForFrameSync();

    delete mBuffer;
    if (mPixmap)
        XFreePixmap(mEglIntegration->xDisplay(),mPixmap);

    mBuffer = new QWaylandShmBuffer(mEglIntegration->waylandDisplay(),size,QImage::Format_ARGB32);
    mWindow->attach(mBuffer);
    mPixmap = XCreatePixmap(mEglIntegration->xDisplay(),mEglIntegration->rootWindow(),size.width(),size.height(),mEglIntegration->depth());
    XSync(mEglIntegration->xDisplay(),False);

    mPixmapSurface = eglCreatePixmapSurface(mEglIntegration->eglDisplay(),mConfig,mPixmap,0);
    if (mPixmapSurface == EGL_NO_SURFACE) {
        qDebug() << "Could not make egl surface out of pixmap :(";
    }
}

getProcAddress()

void * QWaylandReadbackEglContext::getProcAddress ( const QString &  procName )

virtual

Reimplement in subclass to native getProcAddr calls.

Note: its convenient to use qPrintable(const QString &str) to get the const char * pointer

Implements QPlatformGLContext.

Definition at line 141 of file qwaylandreadbackeglcontext.cpp.

{
    return (void *) eglGetProcAddress(procName.toLatin1().data());
}

makeCurrent()

void QWaylandReadbackEglContext::makeCurrent ( )

virtual

Reimplement in subclass to do makeCurrent on native GL context.

Reimplemented from QPlatformGLContext.

Definition at line 98 of file qwaylandreadbackeglcontext.cpp.

Referenced by swapBuffers().

{
    QPlatformGLContext::makeCurrent();

    mWindow->waitForFrameSync();

    eglMakeCurrent(mEglIntegration->eglDisplay(),mPixmapSurface,mPixmapSurface,mContext);
}

platformWindowFormat()

QPlatformWindowFormat QWaylandReadbackEglContext::platformWindowFormat ( ) const

virtual

QWidget has the function qplatformWindowFormat().

That function is for the application programmer to request the format of the window and the context that he wants.

Reimplement this function in a subclass to indicate what format the glContext actually has.

Implements QPlatformGLContext.

Definition at line 146 of file qwaylandreadbackeglcontext.cpp.

{
    return qt_qPlatformWindowFormatFromConfig(mEglIntegration->eglDisplay(),mConfig);
}

swapBuffers()

void QWaylandReadbackEglContext::swapBuffers ( )

virtual

Reimplement in subclass to native swap buffers calls.

Implements QPlatformGLContext.

Definition at line 113 of file qwaylandreadbackeglcontext.cpp.

{
    eglSwapBuffers(mEglIntegration->eglDisplay(),mPixmapSurface);

    if (QPlatformGLContext::currentContext() != this) {
        makeCurrent();
    }

    QSize size = mWindow->geometry().size();

    QImage img(size,QImage::Format_ARGB32);
    const uchar *constBits = img.bits();
    void *pixels = const_cast<uchar *>(constBits);

    glReadPixels(0,0, size.width(), size.height(), GL_RGBA,GL_UNSIGNED_BYTE, pixels);

    img = img.mirrored();
    qgl_byteSwapImage(img,GL_UNSIGNED_INT_8_8_8_8_REV);
    constBits = img.bits();

    const uchar *constDstBits = mBuffer->image()->bits();
    uchar *dstBits = const_cast<uchar *>(constDstBits);
    memcpy(dstBits,constBits,(img.width()*4) * img.height());


    mWindow->damage(QRegion(QRect(QPoint(0,0),size)));
}

Properties

mBuffer

QWaylandShmBuffer* QWaylandReadbackEglContext::mBuffer

private

Definition at line 71 of file qwaylandreadbackeglcontext.h.

Referenced by geometryChanged(), and swapBuffers().

mConfig

EGLConfig QWaylandReadbackEglContext::mConfig

private

Definition at line 75 of file qwaylandreadbackeglcontext.h.

Referenced by geometryChanged(), platformWindowFormat(), and QWaylandReadbackEglContext().

mContext

EGLContext QWaylandReadbackEglContext::mContext

private

Definition at line 76 of file qwaylandreadbackeglcontext.h.

Referenced by makeCurrent(), QWaylandReadbackEglContext(), and ~QWaylandReadbackEglContext().

mEglIntegration

QWaylandReadbackEglIntegration* QWaylandReadbackEglContext::mEglIntegration

private

Definition at line 69 of file qwaylandreadbackeglcontext.h.

Referenced by doneCurrent(), geometryChanged(), makeCurrent(), platformWindowFormat(), swapBuffers(), and ~QWaylandReadbackEglContext().

mPixmap

Pixmap QWaylandReadbackEglContext::mPixmap

private

Definition at line 73 of file qwaylandreadbackeglcontext.h.

Referenced by geometryChanged().

mPixmapSurface

EGLSurface QWaylandReadbackEglContext::mPixmapSurface

private

Definition at line 77 of file qwaylandreadbackeglcontext.h.

Referenced by geometryChanged(), makeCurrent(), and swapBuffers().

mWindow

QWaylandReadbackEglWindow* QWaylandReadbackEglContext::mWindow

private

Definition at line 70 of file qwaylandreadbackeglcontext.h.

Referenced by geometryChanged(), makeCurrent(), and swapBuffers().

---

The documentation for this class was generated from the following files:

• /src/plugins/platforms/wayland/gl_integration/readback_egl/qwaylandreadbackeglcontext.h
• /src/plugins/platforms/wayland/gl_integration/readback_egl/qwaylandreadbackeglcontext.cpp