QBBBuffer Class Reference

#include <qbbbuffer.h>

Public Functions
const QImage *	image () const
QImage *	image ()
void	invalidateInCache ()
screen_buffer_t	nativeBuffer () const
	QBBBuffer ()
	QBBBuffer (screen_buffer_t buffer)
	QBBBuffer (const QBBBuffer &other)
QRect	rect () const
virtual	~QBBBuffer ()

Properties
screen_buffer_t	mBuffer
QImage	mImage

Detailed Description

Definition at line 51 of file qbbbuffer.h.

Constructors and Destructors

QBBBuffer() [1/3]

QBBBuffer::QBBBuffer

(

)

Definition at line 54 of file qbbbuffer.cpp.

    : mBuffer(NULL)
{
#if defined(QBBBUFFER_DEBUG)
    qDebug() << "QBBBuffer::QBBBuffer - empty";
#endif
}

QBBBuffer() [2/3]

QBBBuffer::QBBBuffer

(

screen_buffer_t

buffer

)

Definition at line 62 of file qbbbuffer.cpp.

    : mBuffer(buffer)
{
#if defined(QBBBUFFER_DEBUG)
    qDebug() << "QBBBuffer::QBBBuffer - normal";
#endif

    // get size of buffer
    errno = 0;
    int size[2];
    int result = screen_get_buffer_property_iv(buffer, SCREEN_PROPERTY_BUFFER_SIZE, size);
    if (result != 0) {
        qFatal("QBB: failed to query buffer size, errno=%d", errno);
    }

    // get stride of buffer
    errno = 0;
    int stride;
    result = screen_get_buffer_property_iv(buffer, SCREEN_PROPERTY_STRIDE, &stride);
    if (result != 0) {
        qFatal("QBB: failed to query buffer stride, errno=%d", errno);
    }

    // get access to buffer's data
    errno = 0;
    uchar* dataPtr = NULL;
    result = screen_get_buffer_property_pv(buffer, SCREEN_PROPERTY_POINTER, (void **)&dataPtr);
    if (result != 0) {
        qFatal("QBB: failed to query buffer pointer, errno=%d", errno);
    }
    if (dataPtr == NULL) {
        qFatal("QBB: buffer pointer is NULL, errno=%d", errno);
    }

    // get format of buffer
    errno = 0;
    int screenFormat;
    result = screen_get_buffer_property_iv(buffer, SCREEN_PROPERTY_FORMAT, &screenFormat);
    if (result != 0) {
        qFatal("QBB: failed to query buffer format, errno=%d", errno);
    }

    // convert screen format to QImage format
    QImage::Format imageFormat = QImage::Format_Invalid;
    switch (screenFormat) {
    case SCREEN_FORMAT_RGBX4444:
        imageFormat = QImage::Format_RGB444;
        break;
    case SCREEN_FORMAT_RGBA4444:
        imageFormat = QImage::Format_ARGB4444_Premultiplied;
        break;
    case SCREEN_FORMAT_RGBX5551:
        imageFormat = QImage::Format_RGB555;
        break;
    case SCREEN_FORMAT_RGB565:
        imageFormat = QImage::Format_RGB16;
        break;
    case SCREEN_FORMAT_RGBX8888:
        imageFormat = QImage::Format_RGB32;
        break;
    case SCREEN_FORMAT_RGBA8888:
        imageFormat = QImage::Format_ARGB32_Premultiplied;
        break;
    default:
        qFatal("QBB: unsupported buffer format, format=%d", screenFormat);
    }

    // wrap buffer in an image
    mImage = QImage(dataPtr, size[0], size[1], stride, imageFormat);
}

QBBBuffer() [3/3]

QBBBuffer::QBBBuffer

(

const QBBBuffer &

other

)

Definition at line 133 of file qbbbuffer.cpp.

    : mBuffer(other.mBuffer),
      mImage(other.mImage)
{
#if defined(QBBBUFFER_DEBUG)
    qDebug() << "QBBBuffer::QBBBuffer - copy";
#endif
}

~QBBBuffer()

QBBBuffer::~QBBBuffer ( )

virtual

Definition at line 142 of file qbbbuffer.cpp.

{
#if defined(QBBBUFFER_DEBUG)
    qDebug() << "QBBBuffer::~QBBBuffer";
#endif
}

Functions

image() [1/2]

const QImage* QBBBuffer::image ( ) const

inline

Definition at line 60 of file qbbbuffer.h.

Referenced by QBBRasterWindowSurface::paintDevice().

{ return (mBuffer != NULL) ? &mImage : NULL; }

image() [2/2]

QImage* QBBBuffer::image ( )

inline

Definition at line 61 of file qbbbuffer.h.

{ return (mBuffer != NULL) ? &mImage : NULL; }

invalidateInCache()

void QBBBuffer::invalidateInCache

(

)

Definition at line 149 of file qbbbuffer.cpp.

Referenced by QBBWindow::copyBack(), and rect().

{
#if defined(QBBBUFFER_DEBUG)
    qDebug() << "QBBBuffer::invalidateInCache";
#endif

    // verify native buffer exists
    if (mBuffer == NULL) {
        qFatal("QBB: can't invalidate cache for null buffer");
    }

    // evict buffer's data from cache
    errno = 0;
    int result = msync(mImage.bits(), mImage.height() * mImage.bytesPerLine(), MS_INVALIDATE | MS_CACHE_ONLY);
    if (result != 0) {
        qFatal("QBB: failed to invalidate cache, errno=%d", errno);
    }
}

nativeBuffer()

screen_buffer_t QBBBuffer::nativeBuffer ( ) const

inline

Definition at line 59 of file qbbbuffer.h.

Referenced by QBBWindow::copyBack(), and QBBWindow::post().

{ return mBuffer; }

rect()

QRect QBBBuffer::rect ( ) const

inline

Definition at line 63 of file qbbbuffer.h.

Referenced by QBBWindow::copyBack().

{ return mImage.rect(); }

Properties

mBuffer

screen_buffer_t QBBBuffer::mBuffer

private

Definition at line 68 of file qbbbuffer.h.

Referenced by image(), invalidateInCache(), and nativeBuffer().

mImage

QImage QBBBuffer::mImage

private

Definition at line 69 of file qbbbuffer.h.

Referenced by image(), invalidateInCache(), QBBBuffer(), and rect().

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

• /src/plugins/platforms/blackberry/qbbbuffer.h
• /src/plugins/platforms/blackberry/qbbbuffer.cpp