diff options
Diffstat (limited to 'src/gui/egl/qegl_x11.cpp')
| -rw-r--r-- | src/gui/egl/qegl_x11.cpp | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/src/gui/egl/qegl_x11.cpp b/src/gui/egl/qegl_x11.cpp index be89efe78..daaa4ba12 100644 --- a/src/gui/egl/qegl_x11.cpp +++ b/src/gui/egl/qegl_x11.cpp @@ -125,7 +125,17 @@ void QEglProperties::setVisualFormat(const QX11Info *xinfo) setValue(EGL_RED_SIZE, countBits(visual->red_mask)); setValue(EGL_GREEN_SIZE, countBits(visual->green_mask)); setValue(EGL_BLUE_SIZE, countBits(visual->blue_mask)); - setValue(EGL_ALPHA_SIZE, 0); // XXX + + EGLint alphaBits = 0; +#if !defined(QT_NO_XRENDER) + XRenderPictFormat *format; + format = XRenderFindVisualFormat(xinfo->display(), visual); + if (format && (format->type == PictTypeDirect) && format->direct.alphaMask) { + alphaBits = countBits(format->direct.alphaMask); + qDebug("QEglProperties::setVisualFormat() - visual's alphaMask is %d", alphaBits); + } +#endif + setValue(EGL_ALPHA_SIZE, alphaBits); } extern const QX11Info *qt_x11Info(const QPaintDevice *pd); |