Package com.jogamp.nativewindow

Interface ScalableSurface

All Known Implementing Classes:

JAWTWindow

public interface ScalableSurface

Adding mutable surface pixel scale property to implementing class, usually to a NativeSurface implementation, see setSurfaceScale(float[]).

Field Summary

Fields

Modifier and Type	Field	Description
static float	AUTOMAX_PIXELSCALE	Setting surface-pixel-scale of 0.0f, results in maximum platform dependent pixel-scale, i.e.
static float	IDENTITY_PIXELSCALE	Setting surface-pixel-scale of 1.0f, results in same pixel- and window-units.

Method Summary

Modifier and Type	Method	Description
boolean	canSetSurfaceScale()	Returns true if setSurfaceScale(float[]) is supported, otherwise false.
float[]	getCurrentSurfaceScale(float[] result)	Returns the current pixel scale of the associated NativeSurface.
float[]	getMaximumSurfaceScale(float[] result)	Returns the maximum pixel scale of the associated NativeSurface.
float[]	getMinimumSurfaceScale(float[] result)	Returns the minimum pixel scale of the associated NativeSurface.
float[]	getRequestedSurfaceScale(float[] result)	Returns the requested pixel scale of the associated NativeSurface.
boolean	setSurfaceScale(float[] pixelScale)	Request a pixel scale in x- and y-direction for the associated NativeSurface, where size_in_pixel_units = pixel_scale * size_in_window_units.

Field Detail

IDENTITY_PIXELSCALE

static final float IDENTITY_PIXELSCALE

Setting surface-pixel-scale of 1.0f, results in same pixel- and window-units.

See Also:

Constant Field Values

AUTOMAX_PIXELSCALE

static final float AUTOMAX_PIXELSCALE

Setting surface-pixel-scale of 0.0f, results in maximum platform dependent pixel-scale, i.e. pixel-units >> window-units where available.

See Also:

Constant Field Values

Method Detail

canSetSurfaceScale

boolean canSetSurfaceScale()

Returns true if setSurfaceScale(float[]) is supported, otherwise false.

For pure downstream scalable surfaces like AWT widgets, setting the picel scale is not supported since the pixel scale is set by the underlying toolkit.

setSurfaceScale

boolean setSurfaceScale(float[] pixelScale)

Request a pixel scale in x- and y-direction for the associated NativeSurface, where size_in_pixel_units = pixel_scale * size_in_window_units.

Default pixel scale request for both directions is AUTOMAX_PIXELSCALE.

If canSetSurfaceScale() returns false, requested pixel scale is AUTOMAX_PIXELSCALE, immutable and method returns false.

In case platform only supports uniform pixel scale, i.e. one scale for both directions, either AUTOMAX_PIXELSCALE or the maximum requested pixel scale component is used.

The requested pixel scale will be validated against platform limits before native scale-setup, i.e. clipped to IDENTITY_PIXELSCALE if not supported or clipped to the platform maximum. It can be queried via getRequestedSurfaceScale(float[]).

The actual realized pixel scale values of the NativeSurface can be queried via getCurrentSurfaceScale(float[]) or computed via surface.convertToPixelUnits(new int[] { 1, 1 })

Parameters:

pixelScale - requested surface pixel scale float[2] values for x- and y-direction.

Returns:

true if the current pixel scale has changed, otherwise false.

See Also:

getRequestedSurfaceScale(float[]), canSetSurfaceScale()

getRequestedSurfaceScale

float[] getRequestedSurfaceScale(float[] result)

Returns the requested pixel scale of the associated NativeSurface.

If canSetSurfaceScale() returns false, requested pixel scale is AUTOMAX_PIXELSCALE and immutable.

Parameters:

result - float[2] storage for the result

Returns:

the passed storage containing the current pixelScale for chaining

See Also:

setSurfaceScale(float[]), canSetSurfaceScale()

getCurrentSurfaceScale

float[] getCurrentSurfaceScale(float[] result)

Returns the current pixel scale of the associated NativeSurface.

Parameters:

result - float[2] storage for the result

Returns:

the passed storage containing the current pixelScale for chaining

getMinimumSurfaceScale

float[] getMinimumSurfaceScale(float[] result)

Returns the minimum pixel scale of the associated NativeSurface.

Parameters:

result - float[2] storage for the result

Returns:

the passed storage containing the minimum pixelScale for chaining

getMaximumSurfaceScale

float[] getMaximumSurfaceScale(float[] result)

Returns the maximum pixel scale of the associated NativeSurface.

The maximum pixel scale maybe used to determine the proper dpi value of the monitor displaying this NativeSurface.

    surfacePpMM = monitorPpMM * currentSurfaceScale / nativeSurfaceScale,
    with PpMM == pixel per millimeter
 

Parameters:

result - float[2] storage for the result

Returns:

the passed storage containing the maximum pixelScale for chaining