Package panamagl.canvas.swt

Class GLCanvasSWT

java.lang.Object

org.eclipse.swt.widgets.Widget

org.eclipse.swt.widgets.Control

org.eclipse.swt.widgets.Scrollable

org.eclipse.swt.widgets.Composite

org.eclipse.swt.widgets.Canvas

panamagl.canvas.swt.GLCanvasSWT

All Implemented Interfaces:

org.eclipse.swt.graphics.Drawable, panamagl.canvas.GLCanvas

public class GLCanvasSWT
extends org.eclipse.swt.widgets.Canvas
implements panamagl.canvas.GLCanvas

An SWT Canvas that renders OpenGL offscreen via FBO and paints the result as an image. Unlike GLCanvasSWT_direct which uses SWT's native GLCanvas with a real GL context, this canvas uses the OffscreenRenderer pipeline (FBO rendering + pixel readback) consistent with the Swing and JavaFX offscreen canvases. The rendering pipeline is:

1. display() triggers OffscreenRenderer.onDisplay(panamagl.canvas.GLCanvas, panamagl.GLEventListener)
2. ThreadRedirect_SWT routes to the appropriate thread
3. FBO render + FBOReader_SWT.read(panamagl.offscreen.FBO, panamagl.opengl.GL) produces a SWTImage
4. setScreenshot(panamagl.Image<?>) stores the image and calls Control.redraw()
5. SWT Paint event draws the ImageData to screen via GC

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected class	GLCanvasSWT.ResizeHandler	The GLCanvasSWT.ResizeHandler will trigger rendering on the main macOS thread and then trigger repaint by the thread selected by ThreadRedirect attached to the OffscreenRenderer.

Nested classes/interfaces inherited from interface panamagl.canvas.GLCanvas

panamagl.canvas.GLCanvas.Flip

Field Summary

Fields

Modifier and Type	Field	Description
protected org.eclipse.swt.graphics.Color	color
protected panamagl.performance.RenderCounter	counter
protected panamagl.factory.PanamaGLFactory	factory
protected panamagl.canvas.GLCanvas.Flip	flip
protected boolean	hiDPIEnabled
protected panamagl.GLEventListener	listener
protected panamagl.offscreen.OffscreenRenderer	offscreen
protected SWTImage	out
protected PixelScaleSupportSWT	pixelScaleSupport
protected AtomicBoolean	rendering

Fields inherited from class org.eclipse.swt.widgets.Composite

embeddedHandle

Fields inherited from class org.eclipse.swt.widgets.Widget

handle

Constructor Summary

Constructors

Constructor	Description
GLCanvasSWT(org.eclipse.swt.widgets.Composite parent, int style, panamagl.factory.PanamaGLFactory factory)

Method Summary

Modifier and Type	Method	Description
void	addPixelScaleListener(panamagl.canvas.PixelScaleListener l)
void	display()
panamagl.opengl.GLContext	getContext()
panamagl.offscreen.FBO	getFBO()
panamagl.canvas.GLCanvas.Flip	getFlip()
panamagl.opengl.GL	getGL()
panamagl.GLEventListener	getGLEventListener()
int	getHeight()
panamagl.performance.RenderCounter	getMonitoring()
panamagl.offscreen.OffscreenRenderer	getOffscreenRenderer()
int	getPhysicalHeight()
int	getPhysicalWidth()
panamagl.canvas.PixelScale	getPixelScale()
PixelScaleSupportSWT	getPixelScaleSupport()	Test/diagnostics access to the pixel-scale support.
panamagl.Image<?>	getScreenshot()
int	getWidth()
boolean	isHiDPIEnabled()
boolean	isInitialized()
boolean	isRendering()
protected void	onPixelScaleChanged()	Re-resize the FBO with new physical dimensions when the pixel scale changes.
protected void	paintComponentNow(org.eclipse.swt.widgets.Display display, org.eclipse.swt.graphics.GC gc)	Render GL image and stop counting elapsed time for rendering (started at display()).
void	removePixelScaleListener(panamagl.canvas.PixelScaleListener l)
void	repaint()
void	setFBO(panamagl.offscreen.FBO fbo)
void	setFlip(panamagl.canvas.GLCanvas.Flip flip)
void	setGLEventListener(panamagl.GLEventListener listener)	Does not call display().
void	setHiDPIEnabled(boolean enabled)
void	setOffscreenRenderer(panamagl.offscreen.OffscreenRenderer offscreen)
protected void	setRendering(boolean value)
void	setScreenshot(panamagl.Image<?> image)	Update the image to be displayed.

Methods inherited from class org.eclipse.swt.widgets.Canvas

drawBackground, getCaret, getIME, scroll, setCaret, setFont, setIME

Methods inherited from class org.eclipse.swt.widgets.Composite

changed, checkSubclass, drawBackground, getBackgroundMode, getChildren, getLayout, getLayoutDeferred, getTabList, isLayoutDeferred, layout, layout, layout, layout, layout, setBackgroundMode, setFocus, setLayout, setLayoutDeferred, setTabList, toString

Methods inherited from class org.eclipse.swt.widgets.Scrollable

computeTrim, getClientArea, getHorizontalBar, getScrollbarsMode, getVerticalBar, setScrollbarsMode

Methods inherited from class org.eclipse.swt.widgets.Control

addControlListener, addDragDetectListener, addFocusListener, addGestureListener, addHelpListener, addKeyListener, addMenuDetectListener, addMouseListener, addMouseMoveListener, addMouseTrackListener, addMouseWheelListener, addPaintListener, addTouchListener, addTraverseListener, computeSize, computeSize, dragDetect, dragDetect, forceFocus, getAccessible, getBackground, getBackgroundImage, getBorderWidth, getBounds, getCursor, getDragDetect, getEnabled, getFont, getForeground, getLayoutData, getLocation, getMenu, getMonitor, getOrientation, getParent, getRegion, getShell, getSize, getTextDirection, getToolTipText, getTouchEnabled, getVisible, internal_dispose_GC, internal_new_GC, isAutoScalable, isEnabled, isFocusControl, isReparentable, isVisible, moveAbove, moveBelow, pack, pack, print, redraw, redraw, removeControlListener, removeDragDetectListener, removeFocusListener, removeGestureListener, removeHelpListener, removeKeyListener, removeMenuDetectListener, removeMouseListener, removeMouseMoveListener, removeMouseTrackListener, removeMouseWheelListener, removePaintListener, removeTouchListener, removeTraverseListener, requestLayout, setBackground, setBackgroundImage, setBounds, setBounds, setCapture, setCursor, setDragDetect, setEnabled, setForeground, setLayoutData, setLocation, setLocation, setMenu, setOrientation, setParent, setRedraw, setRegion, setSize, setSize, setTextDirection, setToolTipText, setTouchEnabled, setVisible, toControl, toControl, toDisplay, toDisplay, traverse, traverse, traverse, update

Methods inherited from class org.eclipse.swt.widgets.Widget

addDisposeListener, addListener, addTypedListener, checkWidget, dispose, getData, getData, getDisplay, getListeners, getStyle, getTypedListeners, isAutoDirection, isDisposed, isListening, notifyListeners, removeDisposeListener, removeListener, removeListener, removeTypedListener, reskin, setData, setData

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface panamagl.canvas.GLCanvas

isVisible

Field Details

factory

protected panamagl.factory.PanamaGLFactory factory

listener

protected panamagl.GLEventListener listener

offscreen

protected panamagl.offscreen.OffscreenRenderer offscreen

out

protected SWTImage out

counter

protected panamagl.performance.RenderCounter counter

rendering

protected AtomicBoolean rendering

flip

protected panamagl.canvas.GLCanvas.Flip flip

color

protected org.eclipse.swt.graphics.Color color

pixelScaleSupport

protected PixelScaleSupportSWT pixelScaleSupport

hiDPIEnabled

protected volatile boolean hiDPIEnabled

Constructor Details

GLCanvasSWT

public GLCanvasSWT(org.eclipse.swt.widgets.Composite parent,
 int style,
 panamagl.factory.PanamaGLFactory factory)

Method Details

onPixelScaleChanged

protected void onPixelScaleChanged()

Re-resize the FBO with new physical dimensions when the pixel scale changes.

paintComponentNow

protected void paintComponentNow(org.eclipse.swt.widgets.Display display,
 org.eclipse.swt.graphics.GC gc)

Render GL image and stop counting elapsed time for rendering (started at display()). Equivalent to GLCanvasSwing.paintComponent(..)

display

public void display()

Specified by:

display in interface panamagl.canvas.GLCanvas

isInitialized

public boolean isInitialized()

Specified by:

isInitialized in interface panamagl.canvas.GLCanvas

isRendering

public boolean isRendering()

Specified by:

isRendering in interface panamagl.canvas.GLCanvas

setRendering

protected void setRendering(boolean value)

getGLEventListener

public panamagl.GLEventListener getGLEventListener()

Specified by:

getGLEventListener in interface panamagl.canvas.GLCanvas

setGLEventListener

public void setGLEventListener(panamagl.GLEventListener listener)

Does not call display(). Should be called explicitely.

Specified by:

setGLEventListener in interface panamagl.canvas.GLCanvas

getGL

public panamagl.opengl.GL getGL()

Specified by:

getGL in interface panamagl.canvas.GLCanvas

getContext

public panamagl.opengl.GLContext getContext()

Specified by:

getContext in interface panamagl.canvas.GLCanvas

getMonitoring

public panamagl.performance.RenderCounter getMonitoring()

Specified by:

getMonitoring in interface panamagl.canvas.GLCanvas

getWidth

public int getWidth()

Specified by:

getWidth in interface panamagl.canvas.GLCanvas

getHeight

public int getHeight()

Specified by:

getHeight in interface panamagl.canvas.GLCanvas

repaint

public void repaint()

Specified by:

repaint in interface panamagl.canvas.GLCanvas

setScreenshot

public void setScreenshot(panamagl.Image<?> image)

Update the image to be displayed. Should not be used by anything else than offscreen rendering. TODO : make method name clearer and visibility hidden?

Specified by:

setScreenshot in interface panamagl.canvas.GLCanvas

getScreenshot

public panamagl.Image<?> getScreenshot()

Specified by:

getScreenshot in interface panamagl.canvas.GLCanvas

getOffscreenRenderer

public panamagl.offscreen.OffscreenRenderer getOffscreenRenderer()

Specified by:

getOffscreenRenderer in interface panamagl.canvas.GLCanvas

setOffscreenRenderer

public void setOffscreenRenderer(panamagl.offscreen.OffscreenRenderer offscreen)

Specified by:

setOffscreenRenderer in interface panamagl.canvas.GLCanvas

getFlip

public panamagl.canvas.GLCanvas.Flip getFlip()

Specified by:

getFlip in interface panamagl.canvas.GLCanvas

setFlip

public void setFlip(panamagl.canvas.GLCanvas.Flip flip)

Specified by:

setFlip in interface panamagl.canvas.GLCanvas

getFBO

public panamagl.offscreen.FBO getFBO()

setFBO

public void setFBO(panamagl.offscreen.FBO fbo)

getPixelScale

public panamagl.canvas.PixelScale getPixelScale()

Specified by:

getPixelScale in interface panamagl.canvas.GLCanvas

getPhysicalWidth

public int getPhysicalWidth()

Specified by:

getPhysicalWidth in interface panamagl.canvas.GLCanvas

getPhysicalHeight

public int getPhysicalHeight()

Specified by:

getPhysicalHeight in interface panamagl.canvas.GLCanvas

addPixelScaleListener

public void addPixelScaleListener(panamagl.canvas.PixelScaleListener l)

Specified by:

addPixelScaleListener in interface panamagl.canvas.GLCanvas

removePixelScaleListener

public void removePixelScaleListener(panamagl.canvas.PixelScaleListener l)

Specified by:

removePixelScaleListener in interface panamagl.canvas.GLCanvas

isHiDPIEnabled

public boolean isHiDPIEnabled()

Specified by:

isHiDPIEnabled in interface panamagl.canvas.GLCanvas

setHiDPIEnabled

public void setHiDPIEnabled(boolean enabled)

Specified by:

setHiDPIEnabled in interface panamagl.canvas.GLCanvas

getPixelScaleSupport

public PixelScaleSupportSWT getPixelScaleSupport()

Test/diagnostics access to the pixel-scale support.