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MapLink Pro 11.1.1.0.
Envitia MapLink Pro: The Ultimate Mapping Application Toolkit
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MapLink Pro 11.1.1.0.
Envitia MapLink Pro: The Ultimate Mapping Application Toolkit
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Platform interface class for X11 systems for the OpenGL drawing surface, using X11 and GLX.
This drawing surface requires graphics hardware that is OpenGL 2.1 compliant. OpenGL 3.2 or newer compliant hardware is recommended.
For OpenGL 2.1 hardware support for the following extension is required:
Hardware with support for the following OpenGL extensions is recommended, but not required. For OpenGL 3.2 or newer hardware:
This drawing surface cannot be attached to a pixmap unless the graphics driver supports hardware accelerating rendering to pixmaps. The drawing surface will fail to attach if the driver does not support this.
Non-native rendering for this drawing surface is implemented through a pixmap. During the draw of a non-native layer (identified by the TSLProperty NonNativeDrawing data layer property), the handleToDrawable and handleTo X11DrawingParameters methods of TSLRenderingInterface will return a pixmap and visual that the application should draw into for the layer, which the drawing surface will then composite onto the framebuffer.
The drawable returned from the rendering interface will be different for each non-native layer in the drawing surface, and the visual returned may be different from that used when creating the drawing surface.
The drawing surface assumes that draws to the pixmap set the alpha channel of any pixels written to correctly. When using Xlib colours with a true colour visual this can be done by setting any bits of the pixel colour not covered by the red_mask, green_mask and blue_mask bits of the XVisualInfo struct for the visual to 1.
Support for the GLX_EXT_texture_from_pixmap extension is required for non-native rendering.
Public Member Functions | |
| TSLGLXSurface (Display *display, Screen *screen, Window drawable, Visual *visual, const TSLOpenGLSurfaceCreationParameters &creationProperties) | |
| TSLGLXSurface (Display *display, Screen *screen, GLXDrawable drawable, GLXContext context, const TSLOpenGLSurfaceCreationParameters &creationProperties, Drawable nativeDrawable=0) | |
| virtual | ~TSLGLXSurface () |
| bool | attach (Display *display, Screen *screen, GLXDrawable drawable, GLXContext context, Drawable nativeDrawable=0) |
| GLXContext | context () |
| bool | makeContextCurrent () |
| virtual TSLOpenGLSurface * | caw () |
 Public Member Functions inherited from TSLOpenGLSurface | |
| virtual | ~TSLOpenGLSurface () |
| float | acquireDepthSlice () |
| virtual TSLDrawingSurface * | clone (bool copyUserData=false) |
| double | coordinateCentreX () const |
| double | coordinateCentreY () const |
| TSLOpenGLSurface * | createChildSurface () |
| float | currentDepthSlice () const |
| float | depthSliceIncrement () const |
| void | flushPendingDraws () |
| void | enableRealtimeReprojection (const char *name, bool enable) |
| double | getSwitchRangeForFP64 () const |
| bool | getLayerStorageStrategy (const char *layerName, TSLOpenGLStorageStrategyEnum &strategy) const |
| bool | getLayerTransparencyHint (const char *layerName, TSLOpenGLTransparencyHintEnum &hint) const |
| float | incrementDepthSlice (uint32_t numDrawItems) |
| const float * | modelViewMatrix () const |
| const float * | projectionMatrix () const |
| bool | setAntialiasingMode (TSLOpenGLAntialiasModeEnum mode) |
| bool | targetFrameBuffer (GLuint fbo) |
| GLuint | targetFrameBuffer () const |
| float | setDepthSlice (uint32_t numDrawItems) |
| bool | setDisplayMetrics (double dpiX, double dpiY, int horizontalSizePixels, int verticalSizePixels) |
| void | setSwitchRangeForFP64 (double range) |
| bool | setLayerStorageStrategy (const char *layerName, TSLOpenGLStorageStrategyEnum strategy) |
| bool | setLayerTransparencyHint (const char *layerName, TSLOpenGLTransparencyHintEnum hint) |
| void | setRGBABackgroundColour (unsigned char r, unsigned char g, unsigned char b, unsigned char a) |
| TSLOpenGLStateTracker * | stateTracker () |
| void | shaderPreloadEnabled (bool enabled) |
| bool | shaderPreloadEnabled () const |
| bool | preloadProjectionShaders (const TSLCoordinateSystem *cs, bool loadfp64Variant) |
| void | flushLoadedShaders () |
| void | rasterProjectionControlPointParameters (unsigned int minPointsPerRaster, unsigned int maxPointsPerRaster, unsigned int gridSizePixels) |
| void | textRoundingEnabled (bool enabled) |
| bool | textRoundingEnabled () const |
| void | textRoundingAmount (unsigned int px) |
| unsigned int | textRoundingAmount () const |
| Public Member Functions inherited from TSLDrawingSurface | |
| bool | clearAllRendering () |
| bool | clearDynamicColours () |
| TSLRasterBuffer * | createRasterBuffer (unsigned int width, unsigned int height, TSLRasterBuffer::Format format, TSLRasterBuffer::FilterMode filterMode=TSLRasterBuffer::Linear) |
| bool | declutterIsVisible (const char *feature_name, double resolution=0.0, const char *layer_name=0) const |
| bool | drawDU (TSLDeviceUnits x1, TSLDeviceUnits y1, TSLDeviceUnits x2, TSLDeviceUnits y2, bool clear, bool updateExtentOnly=false) |
| bool | drawUU (double x1, double y1, double x2, double y2, bool clear, bool updateExtentOnly=false) |
| bool | DUToLatLong (TSLDeviceUnits x, TSLDeviceUnits y, double *latitude, double *longitude, bool local=false, bool boundCheck=true) const |
| bool | DUToMU (TSLDeviceUnits x1, TSLDeviceUnits y1, double *x2, double *y2) const |
| bool | DUToTMC (TSLDeviceUnits x1, TSLDeviceUnits y1, TSLTMC *x2, TSLTMC *y2) const |
| bool | DUToUU (TSLDeviceUnits x1, TSLDeviceUnits y1, double *x2, double *y2) const |
| TSLEntity * | findEntityDU (TSLDeviceUnits x, TSLDeviceUnits y, TSLDeviceUnits aperture, int depth, const char *feature_name=NULL) |
| TSLEntity * | findEntityUU (double x, double y, double aperture, int depth, const char *feature_name=NULL) |
| TSLEntity * | findSelectedEntityDU (TSLDeviceUnits x, TSLDeviceUnits y, TSLDeviceUnits aperture, int depth=-1, bool ignoreMapDataLayers=false) |
| TSLEntity * | findSelectedEntityUU (double x, double y, double aperture, int depth=-1, bool ignoreMapDataLayers=false) |
| bool | getColourIndices (int **indices, int *num) |
| TSLDataLayer * | getCoordinateProvidingLayer () |
| const TSLDataLayer * | getCoordinateProvidingLayer () const |
| bool | getDeclutterRange (const char *featureName, double *innerLimit, double *outerLimit, const char *dataLayerName=0, const char *detailLayerName=0) |
| bool | getDeviceCapabilities (int &horizontalSizeMM, int &verticalSizeMM, int &horizontalSizePixels, int &verticalSizePixels) const |
| bool | getDeviceCapabilities (TSLDeviceCapabilities &capabilities) const |
| void | getDUExtent (TSLDeviceUnits *x1, TSLDeviceUnits *y1, TSLDeviceUnits *x2, TSLDeviceUnits *y2) const |
| bool | getFillStyleIndices (int **indices, int *num) |
| bool | getFontStyleIndices (int **indices, int *num) |
| bool | getLineStyleIndices (int **indices, int *num) |
| void | getMUExtent (double *x1, double *y1, double *x2, double *y2) const |
| bool | getSymbolStyleIndices (int **indices, int *num) |
| TSLDrawingSurfaceTiledBufferControl * | getTiledBufferController () |
| void | getTMCExtent (TSLEnvelope &extent) const |
| void | getUUExtent (double *x1, double *y1, double *x2, double *y2) const |
| bool | getViewedLatLongRange (double *latitude, double *longitude, double *range, bool local=false, bool boundCheck=true) const |
| bool | latLongToDU (double latitude, double longitude, TSLDeviceUnits *x, TSLDeviceUnits *y, bool local=false) const |
| bool | latLongToMU (double latitude, double longitude, double *x, double *y, bool local=false) const |
| bool | latLongToTMC (double latitude, double longitude, TSLTMC *x, TSLTMC *y, bool local=false) const |
| bool | latLongToUU (double latitude, double longitude, double *x, double *y, bool local=false) const |
| bool | MUToDU (double x1, double y1, TSLDeviceUnits *x2, TSLDeviceUnits *y2) const |
| bool | MUToLatLong (double x, double y, double *latitude, double *longitude, bool local=false, bool boundCheck=true) const |
| bool | MUToTMC (double x1, double y1, TSLTMC *x2, TSLTMC *y2) const |
| bool | MUToUU (double x1, double y1, double *x2, double *y2) const |
| bool | pan (double x1, double y1, bool auto_redraw=true) |
| bool | pan (double x1, double y1, TSLDeviceUnits xDU, TSLDeviceUnits yDU, bool auto_redraw=true) |
| TSLMapQuery * | query (const char *layerName, TSLTMC x1, TSLTMC y1, TSLTMC x2, TSLTMC y2, int depth=-1, const char *feature_name=NULL) const |
| TSLMapQuery * | query (const char *layerName, TSLTMC x1, TSLTMC y1, TSLTMC x2, TSLTMC y2, TSLSelector *selector) const |
| bool | redraw () |
| bool | reset (bool auto_redraw=true) |
| bool | resize (double x1, double y1, double x2, double y2, bool auto_redraw=true, bool keep_aspect=false) |
| bool | rotate (double angle) |
| double | rotation () const |
| bool | setDeclutterRange (const char *featureName, double innerLimit, double outerLimit, const char *dataLayerName=0, const char *detailLayerName=0) |
| bool | setDeviceCapabilities (const int horizontalSizeMM=0, const int verticalSizeMM=0, const int horizontalSizePixels=0, const int verticalSizePixels=0) |
| bool | setDeviceCapabilities (const TSLDeviceCapabilities &capabilities) |
| void | setRedrawCallback (TSLDrawingSurfaceDrawCallback *callback) |
| bool | setupDynamicColours (const char *filename) |
| bool | setViewedLatLongRange (double latitude, double longitude, double range, bool local=false, bool auto_redraw=true, bool keep_aspect=false) |
| void | TMCperDU (double &xr, double &yr) |
| double | TMCperUU () |
| bool | TMCToDU (TSLTMC x1, TSLTMC y1, TSLDeviceUnits *x2, TSLDeviceUnits *y2) const |
| bool | TMCToLatLong (TSLTMC x, TSLTMC y, double *latitude, double *longitude, bool local=false, bool boundCheck=true) const |
| bool | TMCToMU (TSLTMC x1, TSLTMC y1, double *x2, double *y2) const |
| bool | TMCToUU (TSLTMC x1, TSLTMC y1, double *x2, double *y2) const |
| bool | updateEntityExtent (TSLEntity *entity, const char *layerName) |
| void | userUnitOrigin (double x_origin, double y_origin) |
| void | userUnitOrigin (TSLUUEnum origin_enum) |
| void | userUnits (double factor) |
| double | userUnits () |
| bool | UUToDU (double x1, double y1, TSLDeviceUnits *x2, TSLDeviceUnits *y2) const |
| bool | UUToLatLong (double x, double y, double *latitude, double *longitude, bool local=false, bool boundCheck=true) const |
| bool | UUToMU (double x1, double y1, double *x2, double *y2) const |
| bool | UUToTMC (double x1, double y1, TSLTMC *x2, TSLTMC *y2) const |
| bool | wndResize (TSLDeviceUnits x1, TSLDeviceUnits y1, TSLDeviceUnits x2, TSLDeviceUnits y2, bool auto_redraw=true, TSLResizeActionEnum action=TSLResizeActionNone) |
| bool | zoom (double percent, bool zoom_in, bool auto_redraw=true) |
| TSLDrawingSurface () | |
| virtual | ~TSLDrawingSurface () |
| void | clearSymbolList () |
| void | clearFontList () |
| void | clearLineList () |
| void | clearFillList () |
| bool | removeFillStyle (TSLStyleID style) |
| bool | removeLineStyle (TSLStyleID style) |
| bool | removeSymbolStyle (TSLStyleID style) |
| bool | removeFontStyle (TSLStyleID style) |
| TSLStyleID | createFontID (const TSLSimpleString &name, TSLFontType meaningOfName, int fontWeight, bool italic=false, bool underline=false, bool antiAliased=false, const unsigned char *memoryBlock=NULL, TSLSize memoryBlockSize=0) |
| TSLStyleID | createStandardLineID (const unsigned char *pattern, TSLSize patternLength, int initialOffset, TSLLineScalingType scaleType) |
| TSLStyleID | createSymbolLineID (int symbolID, double size=0.0, TSLDimensionUnits sizeUnits=TSLDimensionUnitsUndefined, float rotation=0.0f, double anchorPointX=0.0, double anchorPointY=0.0, TSLDimensionUnits anchorPointUnits=TSLDimensionUnitsUndefined) |
| TSLStyleID | createStandardFillID (const unsigned char *pattern=NULL, TSLSize patternSizeInBytes=0, int patternXSize=0, int patternYSize=0) |
| TSLStyleID | createSymbolFillID (int symbolID, double size=0.0, TSLDimensionUnits sizeUnits=TSLDimensionUnitsUndefined, float rotation=0.0f, double anchorPointX=0.0, double anchorPointY=0.0, TSLDimensionUnits anchorPointUnits=TSLDimensionUnitsUndefined) |
| TSLStyleID | createSVGSymbolID (const TSLSimpleString &name, const unsigned char *memoryBlock=NULL, TSLSize memoryBlockSize=0) |
| TSLStyleID | createFontSymbolID (const TSLSimpleString &name, TSLFontType meaningOfName, const unsigned char *memoryBlock=NULL, TSLSize memoryBlockSize=0) |
| TSLStyleID | createRasterSymbolID (const TSLSimpleString &name, int xorigin, int yorigin, bool scaleable, const unsigned char *memoryBlock=NULL, TSLSize memoryBlockSize=0) |
| TSLStyleID | createSymbolIDFromSymbol (TSLStyleID symbolID, int numberofColourPairs, const int *colourFrom, const int *colourTo) |
| Public Member Functions inherited from TSLDrawingSurfaceBase | |
| bool | addDataLayer (TSLDataLayer *data_layer_interface, const char *data_id) |
| bool | addDynamicRenderer (TSLDynamicRenderer *renderer, TSLFeatureID featureID=-1, const char *layerName=0) |
| bool | addFeatureRendering (const char *featureName, TSLFeatureID featureID) |
| void | attach (TSLDeviceContext handle) |
| void | attach (TSLWindowHandle handle) |
| void | attach (TSLDrawableHandle handle) |
| bool | bringInFrontof (const char *move_data_layer, const char *target_data_layer) |
| bool | bringToFront (const char *move_data_layer) |
| bool | clearAllDeclutterData (const char *layer_name=0) |
| void | clearAllDynamicRenderers () |
| bool | clearBackgroundColour () |
| bool | clearDeclutterData (const char *feature_name, const char *layer_name=0) |
| bool | clearDynamicRenderer (TSLFeatureID featureID=-1, const char *layerName=0) |
| bool | clearFeatureRendering (const char *featureName, TSLFeatureID featureID) |
| bool | clearFrame () |
| bool | copyDeclutterData (const char *src_feature_name, const char *dest_feature_name, const char *src_layer_name=0, const char *dest_layer_name=0) |
| void | detach () |
| void | detachAllDynamicRenderers () |
| bool | detachDynamicRenderer (TSLFeatureID featureID=-1, const char *layerName=0) |
| const char * | featureClass (TSLFeatureID feature_id) |
| bool | forceLayer (const char *data_id, const char *detail_layer_name) |
| bool | getBackgroundColour (TSLStyleID *value) |
| bool | getColourValue (int colour, unsigned char &r, unsigned char &g, unsigned char &b) |
| TSLDataLayer * | getDataLayer (const char *data_id) |
| bool | getDataLayerInfo (int N, TSLDataLayer **dataLayer, const char **layerName) const |
| bool | getDataLayerProps (const char *data_id, TSLPropertyEnum property_id, TSLPropertyValue *old_value) |
| bool | getDeclutterStatus (const char *feature_name, TSLDeclutterStatusResultEnum *value, const char *dataLayerName=0, const char *detailLayerName=0) |
| bool | getDeclutterStatus (TSLFeatureID feature_id, TSLDeclutterStatusResultEnum *value, const char *dataLayerName, const char *detailLayerName=0) |
| TSLDynamicRenderer * | getDynamicRenderer (TSLFeatureID featureID=-1, const char *layerName=0) |
| bool | getFeatureRendering (const char *featureName, TSLFeatureID featureID, TSLRenderingAttributeInt attribute, int *result) const |
| bool | getFeatureRendering (const char *featureName, TSLFeatureID featureID, TSLRenderingAttributeDouble attribute, double *result) const |
| bool | getFeatureRendering (const char *featureName, TSLFeatureID featureID, TSLRenderingAttributeBool attribute, bool *result) const |
| bool | getFeatureRendering (const char *featureName, TSLFeatureID featureID, TSLRenderingAttributes *result) const |
| int | getNumDataLayers () const |
| bool | getOption (TSLOptionEnum option) |
| void | id (int id_) |
| int | id () const |
| bool | idleProcess () |
| bool | loadDeclutter (const char *filename) |
| bool | loadRendering (const char *filename) |
| TSLPickResultSet * | pick (TSLDeviceUnits x, TSLDeviceUnits y, TSLDeviceUnits aperture, int depth, TSLPickSelector *selector=0) |
| TSLPickResultSet * | pick (const char *data_id, TSLDeviceUnits x, TSLDeviceUnits y, TSLDeviceUnits aperture, int depth=-1, TSLPickSelector *selector=0) |
| bool | queryActiveLayer (const char *data_id, char *detail_layer_name, int detail_layer_name_size) |
| bool | removeDataLayer (const char *data_id) |
| bool | saveDeclutter (const char *filename, TSLMapLinkVersion ver=TSL_CURRENT_MAPLINK_VERSION) |
| bool | saveRendering (const char *filename, TSLMapLinkVersion ver=TSL_CURRENT_MAPLINK_VERSION) |
| bool | sendToBack (const char *move_data_layer) |
| bool | sendToBackOf (const char *move_data_layer, const char *target_data_layer) |
| bool | setBackgroundColour (int value) |
| bool | setCoordinateProvidingLayer (const char *layer_name) |
| bool | setDataLayerProps (const char *data_id, TSLPropertyEnum property_id, TSLPropertyValue new_value) |
| bool | setDeclutterStatus (const char *feature_name, TSLDeclutterStatusEnum value, const char *dataLayerName=0, const char *detailLayerName=0) |
| bool | setDeclutterStatus (TSLFeatureID feature_id, TSLDeclutterStatusEnum value, const char *dataLayerName=0, const char *detailLayerName=0) |
| bool | setDeclutterStatusOnAllFeatures (TSLDeclutterStatusEnum value, const char *dataLayerName=0, const char *detailLayerName=0) |
| bool | setFeatureRendering (const char *featureName, TSLFeatureID featureID, TSLRenderingAttributeInt attribute, int value) |
| bool | setFeatureRendering (const char *featureName, TSLFeatureID featureID, TSLRenderingAttributeDouble attribute, double value) |
| bool | setFeatureRendering (const char *featureName, TSLFeatureID featureID, TSLRenderingAttributeBool attribute, bool value) |
| bool | setFeatureRendering (const char *featureName, TSLFeatureID featureID, TSLRenderingAttributes *value) |
| bool | setFrame (int style, int colour, int thickness) |
| virtual void | setOption (TSLOptionEnum option, bool value) |
| double | TMCperMU () |
| TSLDrawingSurfaceTypeEnum | type () const |
| void | userWord (void *ptr) const |
| void * | userWord () const |
| bool | cloneDynamicRenderersFrom (const TSLDrawingSurfaceBase *otherSurface) |
| void | addDuplicateLayers (bool value) |
| virtual | ~TSLDrawingSurfaceBase () |
Static Public Member Functions | |
| static int | preferredVisualID (Display *display, Screen *screen, const TSLOpenGLSurfaceCreationParameters &creationProperties) |
| Static Public Member Functions inherited from TSLDrawingSurface | |
| static void | cleanup () |
| static bool | copy (TSLDrawingSurface *copyTo, TSLDrawingSurface *copyFrom, bool copyUserData=false) |
| static TSLStyleID | getIDOfNearestColour (int r, int g, int b) |
| static bool | loadStandardConfig (const char *path=0, bool delayLoadIncludes=false) |
| static bool | setupColours (const char *filename) |
| static bool | setupFillStyles (const char *filename, bool delayLoadIncludes=false) |
| static bool | setupFonts (const char *filename, bool delayLoadIncludes=false) |
| static bool | setupLineStyles (const char *filename, bool delayLoadIncludes=false) |
| static bool | setupSymbols (const char *filename, bool delayLoadIncludes=false) |
| static void | disableAntiAliasFonts () |
| static void | enableAntiAliasFonts () |
| Static Public Member Functions inherited from TSLDrawingSurfaceBase | |
| static bool | addLoader (TSLFileLoader *loader) |
| static bool | addPathList (TSLPathList *path_list) |
| static bool | findFile (const char *filename, TSLSimpleString &foundPath) |
| static TSLFileLoader * | getLoader () |
Protected Member Functions | |
| TSLGLXSurface () | |
| Protected Member Functions inherited from TSLOpenGLSurface | |
| TSLOpenGLSurface () | |
| Protected Member Functions inherited from TSLDrawingSurfaceBase | |
| TSLDrawingSurfaceBase () | |
Additional Inherited Members | |
| Protected Attributes inherited from TSLDrawingSurfaceBase | |
| void * | m_classID |
| TSLGLXSurface::TSLGLXSurface | ( | Display * | display, |
| Screen * | screen, | ||
| Window | drawable, | ||
| Visual * | visual, | ||
| const TSLOpenGLSurfaceCreationParameters & | creationProperties ) |
Constructs a new drawing surface, creating a new OpenGL context and attaching it to the given window. The drawing surface owns the context created.
This constructor cannot be used to create a drawing surface attached to a pixmap.
To check if the drawing surface has successfully attached, check that the context() method returns non-zero.
| display | The display connection for the drawing surface to use. |
| screen | The screen for the drawing surface to use. |
| drawable | The window to attach the drawing surface to. |
| visual | The visual to use to create the OpenGL context with the desired attributes. The preferred visual for the drawing surface can be retrieved using the preferredVisualID() method - see the documentation for this method for more information. |
| creationProperties | Options that affect the creation of the drawing surface. See the documentation for TSLOpenGLSurfaceCreationParameters for the available options. |
| TSLGLXSurface::TSLGLXSurface | ( | Display * | display, |
| Screen * | screen, | ||
| GLXDrawable | drawable, | ||
| GLXContext | context, | ||
| const TSLOpenGLSurfaceCreationParameters & | creationProperties, | ||
| Drawable | nativeDrawable = 0 ) |
Constructs a new drawing surface using an existing OpenGL context. The drawing surface does not assume ownership of the context.
To check if the drawing surface has successfully attached, check that the context() method returns non-zero.
| display | The display connection for the drawing surface to use. |
| screen | The screen for the drawing surface to use. |
| drawable | The drawable to which the OpenGL context is attached. |
| context | The existing OpenGL context. This context should have already been made current in the current thread. |
| creationProperties | Options that affect the creation of the drawing surface. See the documentation for TSLOpenGLSurfaceCreationParameters for the available options. |
| nativeDrawable | The Xlib drawable to which the drawing surface is being attached. This is only required to use non-native rendering with a drawing surface created with this constructor, in all other cases it may be left as the default. |
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protected |
| bool TSLGLXSurface::attach | ( | Display * | display, |
| Screen * | screen, | ||
| GLXDrawable | drawable, | ||
| GLXContext | context, | ||
| Drawable | nativeDrawable = 0 ) |
Attaches the drawing surface to the given window using the given OpenGL context. This will detach the drawing surface from any window it is currently attached to.
| display | The display connection for the drawing surface to use. |
| screen | The screen for the drawing surface to use. |
| drawable | The drawable to which the OpenGL context is attached. |
| context | The existing OpenGL context. This context should have already been made current in the current thread. |
| nativeDrawable | The Xlib drawable to which the drawing surface is being attached. This is only required to use non-native rendering with a drawing surface attached with this method, in all other cases it may be left as the default. |
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virtual |
| GLXContext TSLGLXSurface::context | ( | ) |
Returns the OpenGL context in use by the drawing surface. If this returns NULL, the drawing surface did not attach successfully and cannot be used.
| bool TSLGLXSurface::makeContextCurrent | ( | ) |
Binds the OpenGL context held by the drawing surface to the current thread. This method can be used to change the thread used for drawing to the drawing surface.
Returns true if the context was made current in this thread, or false if there was an error or the drawing surface was not attached.
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static |
This method can be used to determine the preferred visual for the drawing surface prior to creating a window in the application. On X11 systems the visual used for a window determines the properties of the drawing surface such as the use of double buffering and antialiasing modes, therefore using the correct visual is extremely important to the functioning and appearance of anything rendered by the drawing surface.
The drawing surface prefers visuals with the highest colour and depth sizes, and the highest number of samples (for antialiasing) that is not greater than creationProperties.numMultisampleSamples().
Returns the visual ID of the visual the drawing surface would like to use, or -1 if no suitable visual could be found.
