diff options
Diffstat (limited to 'src/gui')
| -rw-r--r-- | src/gui/egl/qegl_p.h | 4 | ||||
| -rw-r--r-- | src/gui/egl/qegl_x11.cpp | 145 |
2 files changed, 149 insertions, 0 deletions
diff --git a/src/gui/egl/qegl_p.h b/src/gui/egl/qegl_p.h index 1a5e4c0..7f753d0 100644 --- a/src/gui/egl/qegl_p.h +++ b/src/gui/egl/qegl_p.h @@ -147,6 +147,10 @@ namespace QEgl { Q_GUI_EXPORT EGLNativeDisplayType nativeDisplay(); Q_GUI_EXPORT EGLNativeWindowType nativeWindow(QWidget*); Q_GUI_EXPORT EGLNativePixmapType nativePixmap(QPixmap*); + +#ifdef Q_WS_X11 + Q_GUI_EXPORT VisualID getCompatibleVisualId(EGLConfig config); +#endif }; diff --git a/src/gui/egl/qegl_x11.cpp b/src/gui/egl/qegl_x11.cpp index e8fb662..2c0bbd3 100644 --- a/src/gui/egl/qegl_x11.cpp +++ b/src/gui/egl/qegl_x11.cpp @@ -116,4 +116,149 @@ void QEglProperties::setPaintDeviceFormat(QPaintDevice *dev) setVisualFormat(qt_x11Info(dev)); } + +VisualID QEgl::getCompatibleVisualId(EGLConfig config) +{ + VisualID visualId = 0; + EGLint eglValue = 0; + + EGLint configRedSize = 0; + eglGetConfigAttrib(display(), config, EGL_RED_SIZE, &configRedSize); + + EGLint configGreenSize = 0; + eglGetConfigAttrib(display(), config, EGL_GREEN_SIZE, &configGreenSize); + + EGLint configBlueSize = 0; + eglGetConfigAttrib(display(), config, EGL_BLUE_SIZE, &configBlueSize); + + EGLint configAlphaSize = 0; + eglGetConfigAttrib(display(), config, EGL_ALPHA_SIZE, &configAlphaSize); + + eglGetConfigAttrib(display(), config, EGL_BUFFER_SIZE, &eglValue); + int configBitDepth = eglValue; + + // See if EGL provided a valid VisualID: + eglGetConfigAttrib(display(), config, EGL_NATIVE_VISUAL_ID, &eglValue); + visualId = (VisualID)eglValue; + if (visualId) { + // EGL has suggested a visual id, so get the rest of the visual info for that id: + XVisualInfo visualInfoTemplate; + memset(&visualInfoTemplate, 0, sizeof(XVisualInfo)); + visualInfoTemplate.visualid = visualId; + + XVisualInfo *chosenVisualInfo; + int matchingCount = 0; + chosenVisualInfo = XGetVisualInfo(X11->display, VisualIDMask, &visualInfoTemplate, &matchingCount); + if (chosenVisualInfo) { + if (configBitDepth == chosenVisualInfo->depth) { +#if !defined(QT_NO_XRENDER) + // If we have XRender, actually check the visual supplied by EGL is ARGB + if (configAlphaSize > 0) { + XRenderPictFormat *format; + format = XRenderFindVisualFormat(X11->display, chosenVisualInfo->visual); + if (!format || (format->type != PictTypeDirect) || (!format->direct.alphaMask)) { + qWarning("Warning: EGL suggested using X visual ID %d for config %d, but this is not ARGB", + (int)visualId, (int)config); + visualId = 0; + } + } +#endif + } else { + qWarning("Warning: EGL suggested using X visual ID %d (%d bpp) for config %d (%d bpp), but the depths do not match!", + (int)visualId, chosenVisualInfo->depth, (int)config, configBitDepth); + visualId = 0; + } + } + XFree(chosenVisualInfo); + } + + if (visualId) { +#ifdef QT_DEBUG_X11_VISUAL_SELECTION + if (configHasAlpha) + qDebug("Using ARGB Visual ID %d provided by EGL for config %d", (int)visualId, (int)config); + else + qDebug("Using Opaque Visual ID %d provided by EGL for config %d", (int)visualId, (int)config); +#endif + return visualId; + } + + + // If EGL didn't give us a valid visual ID, try XRender +#if !defined(QT_NO_XRENDER) + if (!visualId) { + XVisualInfo visualInfoTemplate; + memset(&visualInfoTemplate, 0, sizeof(XVisualInfo)); + + visualInfoTemplate.depth = configBitDepth; + visualInfoTemplate.c_class = TrueColor; + + XVisualInfo *matchingVisuals; + int matchingCount = 0; + matchingVisuals = XGetVisualInfo(X11->display, + VisualDepthMask|VisualClassMask, + &visualInfoTemplate, + &matchingCount); + + for (int i = 0; i < matchingCount; ++i) { + XRenderPictFormat *format; + format = XRenderFindVisualFormat(X11->display, matchingVisuals[i].visual); + + // Check the format for the visual matches the EGL config + if ( (countBits(format->direct.redMask) == configRedSize) && + (countBits(format->direct.greenMask) == configGreenSize) && + (countBits(format->direct.blueMask) == configBlueSize) && + (countBits(format->direct.alphaMask) == configAlphaSize) ) + { + visualId = matchingVisuals[i].visualid; + break; + } + } + if (matchingVisuals) + XFree(matchingVisuals); + + } + if (visualId) { +# ifdef QT_DEBUG_X11_VISUAL_SELECTION + if (configHasAlpha) + qDebug("Using ARGB Visual ID %d provided by XRender for EGL config %d", (int)visualId, (int)config); + else + qDebug("Using Opaque Visual ID %d provided by XRender for EGL config %d", (int)visualId, (int)config); +# endif // QT_DEBUG_X11_VISUAL_SELECTION + return visualId; + } +#endif //!defined(QT_NO_XRENDER) + + + // Finally, if XRender also failed to find a visual (or isn't present), try to + // use XGetVisualInfo and only use the bit depth to match on: + if (!visualId) { + XVisualInfo visualInfoTemplate; + memset(&visualInfoTemplate, 0, sizeof(XVisualInfo)); + + visualInfoTemplate.depth = configBitDepth; + + XVisualInfo *matchingVisuals; + int matchingCount = 0; + matchingVisuals = XGetVisualInfo(X11->display, + VisualDepthMask, + &visualInfoTemplate, + &matchingCount); + if (matchingVisuals) { + visualId = matchingVisuals[0].visualid; + XFree(matchingVisuals); + } + } + + if (visualId) { +#ifdef QT_DEBUG_X11_VISUAL_SELECTION + qDebug("Using Visual ID %d provided by XGetVisualInfo for EGL config %d", (int)visualId, (int)config); +#endif + return visualId; + } + + qWarning("Unable to find an X11 visual which matches EGL config %d", (int)config); + return (VisualID)0; +} + + QT_END_NAMESPACE |