TImageEnView.LayersRotationUseFilterOnPreview

Declaration

property LayersRotationUseFilterOnPreview: Boolean;

Description

Displays the user's rotation with the selected anti-alias effect immediately (i.e. before calling LayersFixRotations).

Note: By default, display of the anti-aliasing will occur after a short delay (to improver performance). This can be configured with LayersFastDrawing.

Default: True

Layer Performance Properties

To improve the performance in layer applications, consider the following properties:
◼LayersCaching: Caches the view of each layer. Much faster but uses more memory.
◼LayersFastDrawing: Display quality of layers (and whether the quality view is delayed).
◼LayerFastDrawingEffects specifies which features are disabled while fast drawing.
◼ZoomFilter/DelayZoomFilter: Display quality of images (and whether the quality view is delayed). This option is ignored if LayersFastDrawing is active
◼LayersRotationUseFilterOnPreview: Whether the quality filter (LayersRotationFilter) is previewed without applying the rotation

Review the Demos\LayerEditing\Layers_AllTypes\ demo for example code.

Example

// Always display rotated layers at low quality (for best performance)
ImageEnView1.LayersRotationUseFilterOnPreview := False;

// Rotate the current layer 45 degrees clockwise at highest quality
ImageEnView1.CurrentLayer.Rotate := -45;
ImageEnView1.LayersRotationFilter := ierBilinear;
ImageEnView1.LayersRotationUseFilterOnPreview := True;
ImageEnView1.LayersFastDrawing := iefDelayed;

// Allow the user to free rotate layers at highest quality
ImageEnView1.MouseInteractLayers := [mlRotateLayers];
ImageEnView1.LayersRotationFilter := ierBilinear;
ImageEnView1.LayersRotationUseFilterOnPreview := True;
ImageEnView1.LayersFastDrawing := iefDelayed;

See Also

◼LayersRotationFilter
◼LayersFastDrawing

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