QGLPixelBufferPrivate Class Reference

#include <qglpixelbuffer_p.h>

Public Functions
bool	cleanup ()
void	common_init (const QSize &size, const QGLFormat &f, QGLWidget *shareWidget)
bool	init (const QSize &size, const QGLFormat &f, QGLWidget *shareWidget)
	QGLPixelBufferPrivate (QGLPixelBuffer *q)

Public Variables
HGLRC	ctx
QEglContext *	ctx
HDC	dc
QGLFormat	format
QGLPBufferGLPaintDevice	glDevice
bool	has_render_texture:1
bool	invalid
HPBUFFERARB	pbuf
EGLSurface	pbuf
QGLPixelBuffer *	q_ptr
QGLContext *	qctx
QGLFormat	req_format
QPointer< QGLWidget >	req_shareWidget
QSize	req_size
int	textureFormat

Detailed Description

Definition at line 150 of file qglpixelbuffer_p.h.

Constructors and Destructors

QGLPixelBufferPrivate()

QGLPixelBufferPrivate::QGLPixelBufferPrivate ( QGLPixelBuffer *  q )

inline

Definition at line 153 of file qglpixelbuffer_p.h.

                                             : q_ptr(q), invalid(true), qctx(0), pbuf(0), ctx(0)
    {
#ifdef Q_WS_WIN
        dc = 0;
#elif defined(Q_WS_MACX)
        share_ctx = 0;
#endif
    }

Functions

cleanup()

bool QGLPixelBufferPrivate::cleanup

(

)

Definition at line 154 of file qglpixelbuffer_egl.cpp.

Referenced by nearest_gl_texture_size(), and qt_format_to_attrib_list().

{
    // No need to destroy "pbuf" here - it is done in QGLContext::reset().
    return true;
}

common_init()

void QGLPixelBufferPrivate::common_init	(	const QSize &	size,
		const QGLFormat &	f,
		QGLWidget *	shareWidget
	)

Definition at line 137 of file qglpixelbuffer.cpp.

{
    Q_Q(QGLPixelBuffer);
    if(init(size, format, shareWidget)) {
        req_size = size;
        req_format = format;
        req_shareWidget = shareWidget;
        invalid = false;
        qctx = new QGLContext(format);
        qctx->d_func()->sharing = (shareWidget != 0);
        if (shareWidget != 0 && shareWidget->d_func()->glcx) {
            QGLContextGroup::addShare(qctx, shareWidget->d_func()->glcx);
            shareWidget->d_func()->glcx->d_func()->sharing = true;
        }

        glDevice.setPBuffer(q);
        qctx->d_func()->paintDevice = q;
        qctx->d_func()->valid = true;
#if defined(Q_WS_WIN) && !defined(QT_OPENGL_ES)
        qctx->d_func()->dc = dc;
        qctx->d_func()->rc = ctx;
#elif (defined(Q_WS_X11) && defined(QT_NO_EGL))
        qctx->d_func()->cx = ctx;
        qctx->d_func()->pbuf = (void *) pbuf;
        qctx->d_func()->vi = 0;
#elif defined(Q_WS_MAC)
        qctx->d_func()->cx = ctx;
        qctx->d_func()->vi = 0;
#elif !defined(QT_NO_EGL)
        qctx->d_func()->eglContext = ctx;
        qctx->d_func()->eglSurface = pbuf;
#endif
    }
}

init()

bool QGLPixelBufferPrivate::init	(	const QSize &	size,
		const QGLFormat &	f,
		QGLWidget *	shareWidget
	)

Definition at line 58 of file qglpixelbuffer_egl.cpp.

Referenced by nearest_gl_texture_size(), and qt_format_to_attrib_list().

{
    // Create the EGL context.
    ctx = new QEglContext();
    ctx->setApi(QEgl::OpenGL);

    // Find the shared context.
    QEglContext *shareContext = 0;
    if (shareWidget && shareWidget->d_func()->glcx)
        shareContext = shareWidget->d_func()->glcx->d_func()->eglContext;

    // Choose an appropriate configuration.  We use the best format
    // we can find, even if it is greater than the requested format.
    // We try for a pbuffer that is capable of texture rendering if possible.
    textureFormat = EGL_NONE;
    if (shareContext) {
        // Use the same configuration as the widget we are sharing with.
        ctx->setConfig(shareContext->config());
#if QGL_RENDER_TEXTURE
        if (ctx->configAttrib(EGL_BIND_TO_TEXTURE_RGBA) == EGL_TRUE)
            textureFormat = EGL_TEXTURE_RGBA;
        else if (ctx->configAttrib(EGL_BIND_TO_TEXTURE_RGB) == EGL_TRUE)
            textureFormat = EGL_TEXTURE_RGB;
#endif
    } else {
        QEglProperties configProps;
        qt_eglproperties_set_glformat(configProps, f);
        configProps.setDeviceType(QInternal::Pbuffer);
        configProps.setRenderableType(ctx->api());
        bool ok = false;
#if QGL_RENDER_TEXTURE
        textureFormat = EGL_TEXTURE_RGBA;
        configProps.setValue(EGL_BIND_TO_TEXTURE_RGBA, EGL_TRUE);
        ok = ctx->chooseConfig(configProps, QEgl::BestPixelFormat);
        if (!ok) {
            // Try again with RGB texture rendering.
            textureFormat = EGL_TEXTURE_RGB;
            configProps.removeValue(EGL_BIND_TO_TEXTURE_RGBA);
            configProps.setValue(EGL_BIND_TO_TEXTURE_RGB, EGL_TRUE);
            ok = ctx->chooseConfig(configProps, QEgl::BestPixelFormat);
            if (!ok) {
                // One last try for a pbuffer with no texture rendering.
                configProps.removeValue(EGL_BIND_TO_TEXTURE_RGB);
                textureFormat = EGL_NONE;
            }
        }
#endif
        if (!ok) {
            if (!ctx->chooseConfig(configProps, QEgl::BestPixelFormat)) {
                delete ctx;
                ctx = 0;
                return false;
            }
        }
    }

    // Retrieve the actual format properties.
    qt_glformat_from_eglconfig(format, ctx->config());

    // Create the attributes needed for the pbuffer.
    QEglProperties attribs;
    attribs.setValue(EGL_WIDTH, size.width());
    attribs.setValue(EGL_HEIGHT, size.height());
#if QGL_RENDER_TEXTURE
    if (textureFormat != EGL_NONE) {
        attribs.setValue(EGL_TEXTURE_FORMAT, textureFormat);
        attribs.setValue(EGL_TEXTURE_TARGET, EGL_TEXTURE_2D);
    }
#endif

    // Create the pbuffer surface.
    pbuf = eglCreatePbufferSurface(ctx->display(), ctx->config(), attribs.properties());
#if QGL_RENDER_TEXTURE
    if (pbuf == EGL_NO_SURFACE && textureFormat != EGL_NONE) {
        // Try again with texture rendering disabled.
        textureFormat = EGL_NONE;
        attribs.removeValue(EGL_TEXTURE_FORMAT);
        attribs.removeValue(EGL_TEXTURE_TARGET);
        pbuf = eglCreatePbufferSurface(ctx->display(), ctx->config(), attribs.properties());
    }
#endif
    if (pbuf == EGL_NO_SURFACE) {
        qWarning() << "QGLPixelBufferPrivate::init(): Unable to create EGL pbuffer surface:" << QEgl::errorString();
        return false;
    }

    // Create a new context for the configuration.
    if (!ctx->createContext(shareContext)) {
        delete ctx;
        ctx = 0;
        return false;
    }

    return true;
}

Properties

ctx [1/2]

HGLRC QGLPixelBufferPrivate::ctx

Definition at line 183 of file qglpixelbuffer_p.h.

Referenced by init(), nearest_gl_texture_size(), and qt_format_to_attrib_list().

ctx [2/2]

QEglContext* QGLPixelBufferPrivate::ctx

Definition at line 198 of file qglpixelbuffer_p.h.

dc

HDC QGLPixelBufferPrivate::dc

Definition at line 179 of file qglpixelbuffer_p.h.

Referenced by qt_format_to_attrib_list().

format

QGLFormat QGLPixelBufferPrivate::format

Definition at line 169 of file qglpixelbuffer_p.h.

glDevice

QGLPBufferGLPaintDevice QGLPixelBufferPrivate::glDevice

Definition at line 168 of file qglpixelbuffer_p.h.

has_render_texture

bool QGLPixelBufferPrivate::has_render_texture

Definition at line 180 of file qglpixelbuffer_p.h.

Referenced by qt_format_to_attrib_list().

invalid

bool QGLPixelBufferPrivate::invalid

Definition at line 166 of file qglpixelbuffer_p.h.

Referenced by qt_format_to_attrib_list().

pbuf [1/2]

HPBUFFERARB QGLPixelBufferPrivate::pbuf

Definition at line 182 of file qglpixelbuffer_p.h.

Referenced by init(), nearest_gl_texture_size(), and qt_format_to_attrib_list().

pbuf [2/2]

EGLSurface QGLPixelBufferPrivate::pbuf

Definition at line 197 of file qglpixelbuffer_p.h.

q_ptr

QGLPixelBuffer* QGLPixelBufferPrivate::q_ptr

Definition at line 165 of file qglpixelbuffer_p.h.

qctx

QGLContext* QGLPixelBufferPrivate::qctx

Definition at line 167 of file qglpixelbuffer_p.h.

Referenced by QGLWindowSurface::updateGeometry().

req_format

QGLFormat QGLPixelBufferPrivate::req_format

Definition at line 171 of file qglpixelbuffer_p.h.

req_shareWidget

QPointer<QGLWidget> QGLPixelBufferPrivate::req_shareWidget

Definition at line 172 of file qglpixelbuffer_p.h.

req_size

QSize QGLPixelBufferPrivate::req_size

Definition at line 173 of file qglpixelbuffer_p.h.

textureFormat

int QGLPixelBufferPrivate::textureFormat

Definition at line 199 of file qglpixelbuffer_p.h.

Referenced by init().

---

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

• /src/opengl/qglpixelbuffer_p.h
• /src/opengl/qglpixelbuffer.cpp
• /src/opengl/qglpixelbuffer_egl.cpp
• /src/opengl/qglpixelbuffer_mac.mm
• /src/opengl/qglpixelbuffer_stub.cpp
• /src/opengl/qglpixelbuffer_win.cpp
• /src/opengl/qglpixelbuffer_x11.cpp