Package org.eclipse.swt.internal

Class DPIUtil

java.lang.Object
org.eclipse.swt.internal.DPIUtil
public class DPIUtil extends Object
This class hold common constants and utility functions w.r.t. to SWT high DPI functionality.

The autoScaleUp(..) methods convert from API coordinates (in SWT points) to internal high DPI coordinates (in pixels) that interface with native widgets.

The autoScaleDown(..) convert from high DPI pixels to API coordinates (in SWT points).

Since:
3.105

  • Constructor Details

    • DPIUtil

      public DPIUtil()

  • Method Details

    • autoScaleDown

      public static ImageData autoScaleDown(Device device, ImageData imageData)
      Auto-scale down ImageData

    • autoScaleDown

      public static int[] autoScaleDown(int[] pointArray)

    • autoScaleDown

      public static int[] autoScaleDown(Drawable drawable, int[] pointArray)

    • autoScaleDown

      public static float[] autoScaleDown(float[] size)
      Auto-scale down float array dimensions.

    • scaleDown

      public static float[] scaleDown(float[] size, int zoom)

    • autoScaleDown

      public static float[] autoScaleDown(Drawable drawable, float[] size)
      Auto-scale down float array dimensions if enabled for Drawable class.

    • scaleDown

      public static float[] scaleDown(Drawable drawable, float[] size, int zoom)

    • autoScaleDown

      public static int autoScaleDown(int size)
      Auto-scale down int dimensions.

    • scaleDown

      public static int scaleDown(int size, int zoom)

    • autoScaleDown

      public static int autoScaleDown(Drawable drawable, int size)
      Auto-scale down int dimensions if enabled for Drawable class.

    • scaleDown

      public static int scaleDown(Drawable drawable, int size, int zoom)

    • autoScaleDown

      public static float autoScaleDown(float size)
      Auto-scale down float dimensions.

    • scaleDown

      public static float scaleDown(float size, int zoom)

    • autoScaleDown

      public static float autoScaleDown(Drawable drawable, float size)
      Auto-scale down float dimensions if enabled for Drawable class.

    • scaleDown

      public static float scaleDown(Drawable drawable, float size, int zoom)

    • autoScaleDown

      public static Point autoScaleDown(Point point)
      Returns a new scaled down Point.

    • scaleDown

      public static Point scaleDown(Point point, int zoom)

    • autoScaleDown

      public static Point autoScaleDown(Drawable drawable, Point point)
      Returns a new scaled down Point if enabled for Drawable class.

    • scaleDown

      public static Point scaleDown(Drawable drawable, Point point, int zoom)

    • autoScaleDown

      public static Rectangle autoScaleDown(Rectangle rect)
      Returns a new scaled down Rectangle.

    • scaleDown

      public static Rectangle scaleDown(Rectangle rect, int zoom)

    • autoScaleDown

      public static Rectangle autoScaleDown(Drawable drawable, Rectangle rect)
      Returns a new scaled down Rectangle if enabled for Drawable class.

    • scaleDown

      public static Rectangle scaleDown(Drawable drawable, Rectangle rect, int zoom)

    • scaleImageData

      public static ImageData scaleImageData(Device device, ImageData imageData, int targetZoom, int currentZoom)
      Auto-scale image with ImageData

    • scaleImageData

      public static ImageData scaleImageData(Device device, DPIUtil.ElementAtZoom<ImageData> elementAtZoom, int targetZoom)

    • scaleBounds

      public static Rectangle scaleBounds(Rectangle rect, int targetZoom, int currentZoom)
      Returns a new rectangle as per the scaleFactor.

    • autoScaleImageData

      public static ImageData autoScaleImageData(Device device, ImageData imageData, int imageDataZoomFactor)
      Auto-scale ImageData to device zoom that are at given zoom factor.

    • autoScaleUp

      public static ImageData autoScaleUp(Device device, ImageData imageData)
      Auto-scale up ImageData to device zoom that is at 100%.

    • autoScaleUp

      public static ImageData autoScaleUp(Device device, DPIUtil.ElementAtZoom<ImageData> elementAtZoom)

    • autoScaleUp

      public static int[] autoScaleUp(int[] pointArray)

    • scaleUp

      public static int[] scaleUp(int[] pointArray, int zoom)

    • autoScaleUp

      public static int[] autoScaleUp(Drawable drawable, int[] pointArray)

    • scaleUp

      public static int[] scaleUp(Drawable drawable, int[] pointArray, int zoom)

    • autoScaleUp

      public static int autoScaleUp(int size)
      Auto-scale up int dimensions.

    • scaleUp

      public static int scaleUp(int size, int zoom)
      Auto-scale up int dimensions to match the given zoom level

    • autoScaleUp

      public static int autoScaleUp(Drawable drawable, int size)
      Auto-scale up int dimensions if enabled for Drawable class.

    • scaleUp

      public static int scaleUp(Drawable drawable, int size, int zoom)

    • autoScaleUp

      public static float autoScaleUp(float size)

    • scaleUp

      public static float scaleUp(float size, int zoom)

    • autoScaleUp

      public static float autoScaleUp(Drawable drawable, float size)

    • scaleUp

      public static float scaleUp(Drawable drawable, float size, int zoom)

    • autoScaleUp

      public static Point autoScaleUp(Point point)
      Returns a new scaled up Point.

    • scaleUp

      public static Point scaleUp(Point point, int zoom)

    • autoScaleUp

      public static Point autoScaleUp(Drawable drawable, Point point)
      Returns a new scaled up Point if enabled for Drawable class.

    • scaleUp

      public static Point scaleUp(Drawable drawable, Point point, int zoom)

    • autoScaleUp

      public static Rectangle autoScaleUp(Rectangle rect)
      Returns a new scaled up Rectangle.

    • scaleUp

      public static Rectangle scaleUp(Rectangle rect, int zoom)

    • autoScaleUp

      public static Rectangle autoScaleUp(Drawable drawable, Rectangle rect)
      Returns a new scaled up Rectangle if enabled for Drawable class.

    • scaleUp

      public static Rectangle scaleUp(Drawable drawable, Rectangle rect, int zoom)

    • mapDPIToZoom

      public static int mapDPIToZoom(int dpi)
      Compute the zoom value based on the DPI value.
      Returns:
      zoom

    • mapZoomToDPI

      public static int mapZoomToDPI(int zoom)
      Compute the DPI value value based on the zoom.
      Returns:
      DPI

    • validateAndGetImageDataAtZoom

      public static DPIUtil.ElementAtZoom<ImageData> validateAndGetImageDataAtZoom(ImageDataProvider provider, int zoom)
      Gets ImageData that are appropriate for the specified zoom level together with the zoom level at which the image data are. If there is an image at the specified zoom level, it is returned. Otherwise the next larger image at 150% and 200% is returned, if existing. If none of these is found, the 100% image is returned as a fallback. If provider or fallback image is not available, an error is thrown.

    • validateAndGetImagePathAtZoom

      public static DPIUtil.ElementAtZoom<String> validateAndGetImagePathAtZoom(ImageFileNameProvider provider, int zoom)
      Gets the image file path that are appropriate for the specified zoom level together with the zoom level at which the image data are. If there is an image at the specified zoom level, it is returned. Otherwise the next larger image at 150% and 200% is returned, if existing. If none of these is found, the 100% image is returned as a fallback. If provider or fallback image is not available, an error is thrown.

    • getNativeDeviceZoom

      public static int getNativeDeviceZoom()

    • getDeviceZoom

      public static int getDeviceZoom()

    • setDeviceZoom

      public static void setDeviceZoom(int nativeDeviceZoom)

    • setUseCairoAutoScale

      public static void setUseCairoAutoScale(boolean cairoAutoScale)

    • useCairoAutoScale

      public static boolean useCairoAutoScale()

    • getZoomForAutoscaleProperty

      public static int getZoomForAutoscaleProperty(int nativeDeviceZoom)

    • isAutoScaleOnRuntimeActive

      public static boolean isAutoScaleOnRuntimeActive()