QX11AlphaDetector Struct Reference

Public Functions
bool	hasAlpha () const
bool	hasXRenderAndAlpha () const
	QX11AlphaDetector (const QImage *i, Qt::ImageConversionFlags flags)

Public Variables
bool	checked
bool	has
const QImage *	image

Detailed Description

Definition at line 379 of file qpixmap_x11.cpp.

Constructors and Destructors

QX11AlphaDetector()

QX11AlphaDetector::QX11AlphaDetector ( const QImage *  i, Qt::ImageConversionFlags  flags  )

inline

Definition at line 396 of file qpixmap_x11.cpp.

        : image(i), checked(false), has(false)
    {
        if (flags & Qt::NoOpaqueDetection) {
            checked = true;
            has = image->hasAlphaChannel();
        }
    }

Functions

hasAlpha()

bool QX11AlphaDetector::hasAlpha ( ) const

inline

Definition at line 381 of file qpixmap_x11.cpp.

Referenced by QX11PixmapData::fromImage().

                          {
        if (checked)
            return has;
        // Will implicitly also check format and return quickly for opaque types...
        checked = true;
        has = image->isNull() ? false : const_cast<QImage *>(image)->data_ptr()->checkForAlphaPixels();
        return has;
    }

hasXRenderAndAlpha()

bool QX11AlphaDetector::hasXRenderAndAlpha ( ) const

inline

Definition at line 390 of file qpixmap_x11.cpp.

Referenced by QX11PixmapData::fromImage().

                                    {
        if (!X11->use_xrender)
            return false;
        return hasAlpha();
    }

Properties

checked

bool QX11AlphaDetector::checked

mutable

Definition at line 406 of file qpixmap_x11.cpp.

has

bool QX11AlphaDetector::has

mutable

Definition at line 407 of file qpixmap_x11.cpp.

image

const QImage* QX11AlphaDetector::image

Definition at line 405 of file qpixmap_x11.cpp.

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The documentation for this struct was generated from the following file:

• /src/gui/image/qpixmap_x11.cpp