QWaylandReadbackGlxContext Class Reference

#include <qwaylandreadbackglxcontext.h>

Inheritance diagram for QWaylandReadbackGlxContext:

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...
QPlatformWindowFormat	platformWindowFormat () const
	QWidget has the function qplatformWindowFormat(). More...
	QWaylandReadbackGlxContext (QWaylandReadbackGlxIntegration *glxIntegration, QWaylandReadbackGlxWindow *window)
void	swapBuffers ()
	Reimplement in subclass to native swap buffers calls. More...
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
GLXFBConfig	mConfig
GLXContext	mContext
QWaylandReadbackGlxIntegration *	mGlxIntegration
GLXPixmap	mGlxPixmap
Pixmap	mPixmap
QWaylandReadbackGlxWindow *	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 54 of file qwaylandreadbackglxcontext.h.

Constructors and Destructors

QWaylandReadbackGlxContext()

QWaylandReadbackGlxContext::QWaylandReadbackGlxContext	(	QWaylandReadbackGlxIntegration *	glxIntegration,
		QWaylandReadbackGlxWindow *	window
	)

Definition at line 71 of file qwaylandreadbackglxcontext.cpp.

    : QPlatformGLContext()
    , mGlxIntegration(glxIntegration)
    , mWindow(window)
    , mBuffer(0)
    , mPixmap(0)
    , mConfig(qglx_findConfig(glxIntegration->xDisplay(),glxIntegration->screen(),window->widget()->platformWindowFormat(),GLX_PIXMAP_BIT))
    , mGlxPixmap(0)
{
    XVisualInfo *visualInfo = glXGetVisualFromFBConfig(glxIntegration->xDisplay(),mConfig);
    mContext = glXCreateContext(glxIntegration->xDisplay(),visualInfo,0,TRUE);

    geometryChanged();
}

Functions

doneCurrent()

void QWaylandReadbackGlxContext::doneCurrent ( )

virtual

Reimplement in subclass to release current context.

Typically this is calling makeCurrent with 0 "surface"

Reimplemented from QPlatformGLContext.

Definition at line 93 of file qwaylandreadbackglxcontext.cpp.

{
    QPlatformGLContext::doneCurrent();
}

geometryChanged()

void QWaylandReadbackGlxContext::geometryChanged

(

)

Definition at line 136 of file qwaylandreadbackglxcontext.cpp.

Referenced by QWaylandReadbackGlxContext(), and QWaylandReadbackGlxWindow::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;
    //XFreePixmap deletes the glxPixmap as well
    if (mPixmap) {
        XFreePixmap(mGlxIntegration->xDisplay(),mPixmap);
    }

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

    mGlxPixmap = glXCreatePixmap(mGlxIntegration->xDisplay(),mConfig,mPixmap,0);

    if (!mGlxPixmap) {
        qDebug() << "Could not make egl surface out of pixmap :(";
    }
}

getProcAddress()

void * QWaylandReadbackGlxContext::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 126 of file qwaylandreadbackglxcontext.cpp.

{
    return (void *) glXGetProcAddress(reinterpret_cast<GLubyte *>(procName.toLatin1().data()));
}

makeCurrent()

void QWaylandReadbackGlxContext::makeCurrent ( )

virtual

Reimplement in subclass to do makeCurrent on native GL context.

Reimplemented from QPlatformGLContext.

Definition at line 86 of file qwaylandreadbackglxcontext.cpp.

Referenced by swapBuffers().

{
    QPlatformGLContext::makeCurrent();

    glXMakeCurrent(mGlxIntegration->xDisplay(),mGlxPixmap,mContext);
}

platformWindowFormat()

QPlatformWindowFormat QWaylandReadbackGlxContext::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 131 of file qwaylandreadbackglxcontext.cpp.

{
    return qglx_platformWindowFromGLXFBConfig(mGlxIntegration->xDisplay(),mConfig,mContext);
}

swapBuffers()

void QWaylandReadbackGlxContext::swapBuffers ( )

virtual

Reimplement in subclass to native swap buffers calls.

Implements QPlatformGLContext.

Definition at line 98 of file qwaylandreadbackglxcontext.cpp.

{
    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)));
    mWindow->waitForFrameSync();

}

Properties

mBuffer

QWaylandShmBuffer* QWaylandReadbackGlxContext::mBuffer

private

Definition at line 71 of file qwaylandreadbackglxcontext.h.

Referenced by geometryChanged(), and swapBuffers().

mConfig

GLXFBConfig QWaylandReadbackGlxContext::mConfig

private

Definition at line 74 of file qwaylandreadbackglxcontext.h.

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

mContext

GLXContext QWaylandReadbackGlxContext::mContext

private

Definition at line 75 of file qwaylandreadbackglxcontext.h.

Referenced by makeCurrent(), platformWindowFormat(), and QWaylandReadbackGlxContext().

mGlxIntegration

QWaylandReadbackGlxIntegration* QWaylandReadbackGlxContext::mGlxIntegration

private

Definition at line 69 of file qwaylandreadbackglxcontext.h.

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

mGlxPixmap

GLXPixmap QWaylandReadbackGlxContext::mGlxPixmap

private

Definition at line 76 of file qwaylandreadbackglxcontext.h.

Referenced by geometryChanged(), and makeCurrent().

mPixmap

Pixmap QWaylandReadbackGlxContext::mPixmap

private

Definition at line 73 of file qwaylandreadbackglxcontext.h.

Referenced by geometryChanged().

mWindow

QWaylandReadbackGlxWindow* QWaylandReadbackGlxContext::mWindow

private

Definition at line 70 of file qwaylandreadbackglxcontext.h.

Referenced by geometryChanged(), and swapBuffers().

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

• /src/plugins/platforms/wayland/gl_integration/readback_glx/qwaylandreadbackglxcontext.h
• /src/plugins/platforms/wayland/gl_integration/readback_glx/qwaylandreadbackglxcontext.cpp